Journal articles: 'Crankshaft'

1

Sun, Zhi Juan, and Jing Tao Dai. "Modal and Strength Analysis of Crankshaft in Piston Compressor." Advanced Materials Research 945-949 (June 2014): 676–79. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.676.

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For research on comprehensive performance of crankshaft in piston compressor, multi-body dynamics model was built to get mechanical boundary conditions of the crankshaft, and the fatigue strength was verified; Finite element model (FEM) of the crankshaft was established, and the 1st 6 modal of the crankshaft was obtained. The results showed that fatigue strength and dynamic characteristic of the crankshaft was qualified. Theoretical basis could be provided for optimize the crankshaft’s structure by fatigue strength and modal analysis.

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2

Baragetti, S. "Design Criteria for High Power Engines Crankshafts." Open Mechanical Engineering Journal 9, no. 1 (April 23, 2015): 271–81. http://dx.doi.org/10.2174/1874155x01509010271.

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The reliability of any mechanical system, in which the linear displacement of a piston is converted into the rotation of a power transmission shaft, strongly depends on the reliability of the crankshaft. The crankshaft is the critical component and any damage occurring to the crankshaft may put the mechanical system out of order. The numerical finite element simulation of crankshafts with multiple rods is often time consuming even if quite accurate if the aim is to evaluate the stress-strain behavior at the notched area and verify the component. The development of a simplified numerical model would prove effective to reduce the time needed to reach a good approximation design of the crankshaft. The aim of this paper is to give the designer a numerical procedure that allows to determine the strain and stress state and verify crankshafts having two or more rods.

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Wei, Yao Bing, and Zhen Zhen Qu. "The Static Analysis of the Parallel Bars of the Crankshaft of a Mini Air Compressor on ANSYS." Applied Mechanics and Materials 397-400 (September 2013): 344–54. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.344.

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Mechanical model of crankshaft and connecting rod mechanism of reciprocating compressor was built. Then the order of stress was obtained every ten degrees while crankshaft turning. The larger stress of crankshaft initial turnings was utilized to calculate the whole model and the unreliable region and destructive working condition then was determined. The situation was simulated with ANALYS and the static characteristics, i.e. stress and strain, of the crankshaft was also obtained. The simulated results testify the analysis and the results of the paper have great value for reference when designing crankshafts.

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4

Nozdrzykowski, Krzysztof, Zenon Grządziel, and Jozef Harušinec. "Determining and Analysing Support Conditions at Variable Construction of Crankshafts." New Trends in Production Engineering 1, no. 1 (October 1, 2018): 553–60. http://dx.doi.org/10.2478/ntpe-2018-0069.

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Abstract The article presents study results of the influence of crankshaft construction changes on the choice of support conditions allowing to eliminate deflections and elastic deformations of crankshafts under their self-weight. For the purpose of this study we implemented a programme for strength calculations Nastran FX 2010 which enables modelling the research subject with a finite element method and counting the value if reaction forces ensuring zero value of deflections on main journals at a change in the crankshaft’s angle of rotation.

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CHEN, XIAO PING, XIAO LI YU, RU FU HU, and JIAN FENG LI. "PREDICTION OF CRANKSHAFT FATIGUE LIMIT LOAD BY CRACK-MODELING TECHNIQUE." Journal of Advanced Manufacturing Systems 10, no. 01 (June 2011): 127–34. http://dx.doi.org/10.1142/s0219686711002065.

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In this paper, combining the previous crankshaft fatigue test data with Crack-Modeling Technique, the threshold stress intensity range, ΔKth of crankshaft can be derived. The calculated threshold, ΔKth takes the effect of material properties and processing technology into account. Then, using the threshold, ΔKth, we can predict the fatigue limit load of the different types of crankshafts with the same material properties and processing technology by Crack-Modeling Technique. This study shows that the standard crack may be a good equivalent to the crankshaft stress concentration and the prediction of the crankshaft fatigue limit load is accurate.

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6

Zhan, Ke, Xiao Ling Yu, Bin Yan Yu, and Jia Xie. "Torsional Vibration Analysis for Large-Scale Reciprocating Compressor Crankshaft." Applied Mechanics and Materials 457-458 (October 2013): 428–32. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.428.

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This paper presents a new method which combined multi-body dynamics theory and finite element technology to calculate transient stress of the crankshaft of the large-scale reciprocating compressor. On the basis of multi-body dynamics theory, the kinematical simulation of the crankshaft, the connecting rod, the piston and other components were performed, and thus to get the vibration modal of the crankshaft. So we can judge whether the crankshafts torsional resonance will happen, as well as get the real loads on the crankshaft when it worked. Then the transient stress of the crankshaft can be calculated using finite element technology. Comparing to traditional stress calculating methods, this new method not only considers the variable inertia which caused by reciprocating masss movement, but also can calculate the integrated vibration stress of crankshaft in three directions, including torsion, lateral and axial. Therefore, this method can describe dynamic characteristics of the crankshaft more accurately and more entirely.

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Denisov, Aleksandr, Artur Asoyan, Alexey Verkhutov, Natalija Kokodeeva, and Dmitrij Nikitin. "Change of Carrying Shaft Innovative Capacity in The Process of Growth of Fatal Cracks." MATEC Web of Conferences 334 (2021): 02014. http://dx.doi.org/10.1051/matecconf/202133402014.

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In the paper, the processes of changing the technical state of the crankshaft due to deformation and fatigue failure are considered. The defect method is presented, which allows to estimate the degree of fatigue damage of the crankshaft and to choose the way of restoration of the crankshafts

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8

Okamura, H., A. Shinno, T. Yamanaka, A. Suzuki, and K. Sogabe. "Simple Modeling and Analysis for Crankshaft Three-Dimensional Vibrations, Part 1: Background and Application to Free Vibrations." Journal of Vibration and Acoustics 117, no. 1 (January 1, 1995): 70–79. http://dx.doi.org/10.1115/1.2873869.

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To simplify the analysis of the three-dimensional vibrations of automobile engine crankshafts under firing conditions, the crankshaft was idealized by a set of jointed structures consisting of simple round rods and simple beam blocks of rectangular cross-section. The front pulley, timing gear, and the fly-wheel were idealized by a set of masses and moments of inertia. The main journal bearings were idealized by a set of linear springs and dash-pots. For each constituent member, the dynamic stiffness matrix was derived (in closed form) from the transfer matrix. Then the dynamic stiffness matrix for the total crankshaft system was constructed, and the natural frequencies and mode shapes were calculated. The modeling and analysis procedures were applied to the analysis of free vibrations of four kinds of crankshafts: single cylinder, three-cylinder in-line, four-cylinder in-line, and V-six engines. The different coupling behavior of the three-dimensional vibrations in the planar-structure and the solid-structure crankshaft is discussed, and the influence of the bearing oil film stiffness on the crankshaft natural frequency is also analyzed.

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9

Tabakov, Petr A., and Aleksey P. Tabakov. "Device for checking crankshaft bending and its straightening." Tekhnicheskiy servis mashin, no. 2 (June 10, 2020): 96–101. http://dx.doi.org/10.22314/2618-8287-2020-58-2-96-101.

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Before grinding, the crankshafts are checked for curvature, the allowed runout of the average root neck should be within 0.03-0.05 mm. Straightening is performed on a hydraulic press, installing the crankshaft on prisms in the side root necks, and to check the degree of straightening, one have to move the crankshaft to the grinding machine and fix it on the centers. Such devices have many disadvantages. (Research purpose) The research purpose is in expanding the functionality of the crankshaft straightening device, developing drawings and application of a patent for a device that could check the bending of the crankshaft at the centers, as well as straightening with a fixed reverse bend, which eliminates multiple straightening and increases the life of the shaft and the resource of the internal combustion engine. (Materials and methods) The article proposes upgraded equipment, protected by a patent, to increase the life of the crankshaft, labor productivity by 3-4 times and the accuracity of straightening. (Results and discussion) Authors have made drawings and got patent N191590 from August 14, 2019 for a device for checking the bending of the shaft on the centers and straightening under the press. The article describes the equipment work. (Conclusions) Checking the crankshaft for bending at the centers and straightening with a fixed reverse bend on a single device significantly improves labor productivity and straightening accuracy. The straightening of crankshafts by the proposed method is more than 99 percent without breakdowns.

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10

Chen, Xiao Ping, and Ru Fu Hu. "Analysis of Surface Rolling Process Impact on Crankshaft Fatigue Strength." Advanced Materials Research 488-489 (March 2012): 236–40. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.236.

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In this paper, the fatigue comparative test includes two groups of crankshafts, one group with surface rolling process and the other not, has been finished. And the test results are analyzed. The parent standard deviation test shows that there is not effect of surface rolling process impact on the uniformity of crankshaft fatigue strength. But it is sure that there is the impact of surface rolling process impact on the average of crankshaft fatigue strength by the average maternal test. So the surface rolling process can be used to improve crankshaft fatigue strength.

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11

Li, Hui Qin, Dong Wang, Yan Li, and Xiu Li Zhang. "Three-Dimensional FEM Analysis for a Kind of Engine Crankshaft." Applied Mechanics and Materials 184-185 (June 2012): 605–8. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.605.

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By using SolidWorks2010 software 3d entity modeling for the engine crankshaft of the developed tobacco harvest machine was built, and Ansys system combining working conditions to crankshaft with Ansys finite element method was imported. Then the crankshaft's stress result figure in four conditions was got, the stress concentration area was found, comparing and the analysis the the working conditions of the results, thus the basis theory for the engine of the crankshaft structure optimization design and research was provided.

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12

Wang, San Wu, Jiang Wu, Yao Deng Fan, Shou Ma, and Xi Bin Gong. "Crankshaft Composite Lathe’s Tool Tip Trajectory Error Analysis and Simulation." Advanced Materials Research 823 (October 2013): 199–204. http://dx.doi.org/10.4028/www.scientific.net/amr.823.199.

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The crankshaft composite follow crankshaft turning lathes use the following tool system to complete the turning of crankshaft, when crankshaft machining is working, the turret mechanisms processing error and assembly errors will affect the crankshafts processing quality, So it is difficult to control the actual machining accuracy, or it may cause the waste of material. Therefore, in this paper, by analyzing the impact of the rod length errors on the trajectory of the tool tip, the tool tip trajectorys equations can be built. Using MATLAB tools, we can build the tip point trajectory modeling and solve the deviation between the actual tip point and the ideal trajectory, and finally can get the result of rod lengths error on the accuracy of the actual processing, which will provide basis for the design and analysis in future.

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13

Ba, Peng, Shu Tian Zhang, and Xiu Heng Zhang. "The Feature Parametric Design of Crankshaft for Reciprocating Compressor." Applied Mechanics and Materials 431 (October 2013): 116–20. http://dx.doi.org/10.4028/www.scientific.net/amm.431.116.

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For shorten the product design cycle and saved the cost, the 2.5L reciprocating compressor crankshaft is parametric designed by Pro/E. stress analysis about crankshaft during a revolution was done to check each dangerous cross-section based on dynamics, materials mechanics. The result shows that the feature parametric designs obviously shorten the design cycle and saved the design cost of different specifications crankshafts for reciprocating compressor.

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14

Rajendran, S., and M. V. Narasimhan. "Effect of Inertia Variation Due to Reciprocating Parts and Connecting Rod on Coupled Free Vibration of Crankshaft." Journal of Engineering for Gas Turbines and Power 119, no. 1 (January 1, 1997): 257–63. http://dx.doi.org/10.1115/1.2815557.

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The inertia due to reciprocating parts and connecting rods, as felt by the crankshaft, varies with the crank angle. The effect of inertia variation on torsional free vibration of crankshafts has been studied extensively. In this paper, the effect on combined torsional and bending free vibrations is examined. Single-cylinder engine crankshaft geometry is considered for the study. The results indicate that the inertial coupling, introduced by the reciprocating parts and connecting rod, significantly influences the free vibration characteristics, particularly when the natural frequencies of the crankskahft are closely spaced. The results suggest that, under such conditions, modeling the crankshaft as a pure torsional system would involve considerable error.

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15

Chybowski, Leszek, Krzysztof Nozdrzykowski, Zenon Grządziel, and Lech Dorobczyński. "Evaluation of Model-Based Control of Reaction Forces at the Supports of Large-Size Crankshafts." Sensors 20, no. 9 (May 6, 2020): 2654. http://dx.doi.org/10.3390/s20092654.

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A support control automation system employing force sensors to a large-size crankshaft main journals’ flexible support-system was studied. The current system was intended to evaluate the geometric condition of crankshafts in internal combustion diesel engines. The support reaction forces were changed to minimize the crankshaft elastic deflection as a function of the crank angle. The aim of this research was to verify the hypothesis that the mentioned change can be expressed by a monoharmonic model regardless of a crankshaft structure. The authors’ investigations have confirmed this hypothesis. It was also shown that an algorithmic approach improved the mathematical model mapping with the reaction forces due to faster and more accurate calculations of a phase shift angle. The verification of the model for crankshafts with different structural designs made it possible to assess how well the model fits the coefficients of determination that were calculated with the finite element analysis (FEA). For the crankshafts analyzed, the coefficients of determination R2 were greater than 0.9997, while the maximum relative percentage errors δmax were up to 1.0228%. These values can be considered highly satisfactory for the assessment of the conducted study.

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16

Luo, Jun, Jie Sun, and Guang Jie Yuan. "Finite Element Model Analysis on Five-Cylinder Marine Diesel’s Crankshaft Based on UG and ANSYS." Advanced Materials Research 538-541 (June 2012): 677–81. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.677.

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Ship host is the heart of one ship, while the crankshaft is the core components of ship host. Created a three-dimension crankshaft’s modal through UG, then use FEM software ANSYS to simplified the characteristics details and constraints. Take the modal analysis of the crankshaft in order to gain the natural frequency and mode shapes).

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17

Huang, Yi Cheng, and Dain Yu Lin. "Dynamic Motion and Modal Analysis Simulation for the Balance Mass of the Crankshaft of a Two-Cylinder Reciprocating Air Compressor." Applied Mechanics and Materials 511-512 (February 2014): 696–99. http://dx.doi.org/10.4028/www.scientific.net/amm.511-512.696.

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The purpose of this study is to suppress the problem of vibration which occurs in a running two-cylinder reciprocating compressor. Determining an optimal crankshaft counterweight and narrowing the trajectory orbit of the crankshaft connecting rod mechanism is achieved. Use of finite element software (ANSYS) was used to simulate the modality of the two cylinders. In additions, the inertial force influenced to the crankshaft under different counterweight design was simulated. Simulation results by using SolidWorks software show the new counterweight was able to reduce the crankshafts eccentric by 4mm and the orbit trajectory by 10mm. This study provides the procedures pertaining to the bettering performance and assessment for an existing reciprocating compressor.

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18

Tarasenko, Boris, Evgeny Shapiro, Sergey Voinash, Alexey Kamenchukov, and Аbdul Мudalif Dzhasheev. "Improvement of the Method for Restoring the Bearing Supports of Steel Crankshaft." Materials Science Forum 1031 (May 2021): 50–57. http://dx.doi.org/10.4028/www.scientific.net/msf.1031.50.

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In the science of car repair, the problem of restoring worn-out crankshafts is very relevant. The engineering solutions proposed in the article will provide an increase in the technical and economic indicators of repair: an increase in the quality of coating by a gas-flame method with a finishing non-abrasive antifriction treatment. At the same time, the engineering solution consisting in the formation of one groove on each journal of the crankshaft, brazing of a copper wire, followed by flame spraying of a coating, sealed by a disk, and grinding of the journals (the bearing supports), provides a non-wear effect. So, thanks to the coil of copper wire, the resource of the crankshaft increases and the cost of repaired crankshafts are reduced in comparison with new ones.

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19

Purnama, Harry. "Analisis Transien Untuk Memprediksi Kedalaman Pengerasan Permukaan Pada Bagian Kritis Crankshaft." Majalah Ilmiah Pengkajian Industri 10, no. 2 (August 15, 2016): 129–36. http://dx.doi.org/10.29122/mipi.v10i2.140.

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Dalam penelitian ini simulasi dinamis transien diterapkan pada crankshaft dengan silinder ganda empat stroke. Analisis elemen hingga dilakukan dengan menggunakan software bantu ANSYS untuk memperoleh tegangan von-misses di lokasi kritis, sedangkan permodelan 3D menggunakan software 3D modeling CATIA. Beban dan kondisi batas yang diterapkan sesuai dengan kondisi engine mounting di ANSYS. Simulasi transien di mana pembebanan didasarkan pada waktu diharapkan dapat memperoleh kedalaman dari konsentrasi tegangan. Hal ini dapat membantu untuk proses m dari crankshaft, pengerasan permukaan.Â * In this study a transient dynamic simulation was conducted on a crankshaft for double cylinder four stroke engine. Finite element analysis was performed to obtain of von-misses stress at critical locations using ANSYS, while the model creation can be created by well known 3D modeling software CATIA. The load and boundary conditions were applied according to the engine mounting conditions in ANSYS. The simulation with the proper time step be expected depth of stress concentration. It can help to the next process of crankshaft, surface hardening.Â Kata kunci : Analisa Transient, Time Step, ANSYS, Crankshft, Pengerasan Permukaan.

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20

Nikabdullah, N., Reza Alebrahim, Salvinder S. K. Singh, Mohd Izzali Ismail, and Mohd Azali Abu Bakar. "Stress Analysis on an Automotive Crankshaft under Mixed Mode Loading." Applied Mechanics and Materials 465-466 (December 2013): 453–57. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.453.

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The failures of the crankshafts are constantly subjected to cyclic loading which will tend to display the effects of fatigue that is stochastic in nature. The maximum bending moment occurs during the combustion cycle, where the direction of forces acting on the crankshaft will be exactly towards the centre of the crank radius. The torsional stress occurs during the power cycle can be considered as a quasi-static torsion as it is in steady condition. The aim of this paper is to illustrate the development of the analytical stress analysis used to determine mixed mode loading acting on the crankshaft. The analytical method developed according to the geometric ratio of the connecting rod and crankpin web to determine the variation of bending moment and torsional stress. It was observed that the maximum bending moment and torsional stress acting on the crankshaft are at angles and respectively due to the geometric ratio of the connecting rod and crankpin web. The analytical method that was derived and used for this study provides a good accuracy in determining the critical angles for bending moment and torsional stress acting on the crankshaft based on the geometric ratio.

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21

Pereira, Marcos Venicius S., Fathi Aref Darwish, André Feiferis, and Tiago Lima Castro. "Multiaxial fatigue criteria applied to motor crankshaft in thermoelectric power plants." MATEC Web of Conferences 300 (2019): 04003. http://dx.doi.org/10.1051/matecconf/201930004003.

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Fatigue failures of motor crankshafts operating in thermoelectric power plants have recently been reported. Stress fields provided by finite element calculations at critical points of a crankshaft that failed in service are used to test the structural integrity of the component. Taking into account the fact that the stresses acting at a given point are most likely out of phase, multiaxial fatigue criteria based on the von Mises stress are considered to be most suitable for predicting the fatigue behavior of the crankshaft. Using the von Mises stress, it was also possible to apply octahedral shear stress-based criteria and the results obtained have indicated that the crankshaft made of DIN 34CrNiMo6 steel should not suffer fatigue failure under the action of the stress fields in question. However, such failures have been occurring and this apparent discrepancy is presented and briefly discussed in the present study.

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22

Yuan, Zi Xia, Shou Qi Cao, Li Zheng Zhang, and Shuai Zhang. "Research of the Worm Gear and Worm on the Splicing Marine Crankshaft's Trimming Device." Applied Mechanics and Materials 475-476 (December 2013): 1439–44. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1439.

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For the convenience of the research of the splicing marine crankshaft's trimming device design, this article provides a design idea, and the strength calculation of the core parts of worm gear and worm strength calculation and checking methods are studied to according to the different models of splicing crankshaft to choose proper trimming device of worm gear and worm. Foreword More than ten cylinder large Marine crankshaft is heavily in research and development in our country, the initial design concept through two small crank were spliced. Now we need to design a bracket can be tuned to ensure that the crankshaft used for splicing two concentricity error is within the allowable range . This article briefly introduces the requirements for the working platform and technology trimmer splicing type ship.

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23

Torims, Toms. "Laser Cladding Device for In Situ Repairs of Marine Crankshafts." Advanced Materials Research 712-715 (June 2013): 709–14. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.709.

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This paper presents the development and design of the laser cladding machine for marine diesel engine crankshaft in-situ repairs. The described technology and device is designed to perform crankpin journal build-up operations directly in the engine housing, without removing the crankshaft from the engine. Furthermore, this technology could be successful-ly combined with the subsequent final machining operation grinding. There is already equipment and technology in place for in-situ crankpin grinding operations. Both technological platforms can be combined to deliver the most appropriate output. For the very first time, this paper outlines the novel, in-situ concept of applying laser cladding to marine crankshafts. The principal design of the in-situ laser clad-ding machine is provided and is accompanied with a de-tailed description of the in-situ laser cladding machine construction. The proposed device and method satisfy ship-board crankshaft surface renovation needs and opens up an entirely new dimension for the industrial application of laser cladding technologies.

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Heath, A. R., and P. M. McNamara. "Crankshaft Stress Analysis—Combination of Finite Element and Classical Analysis Techniques." Journal of Engineering for Gas Turbines and Power 112, no. 3 (July 1, 1990): 268–75. http://dx.doi.org/10.1115/1.2906491.

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The conflicting legislative and customer pressures on engine design, for example, combining low friction and a high level of refinement, require sophisticated tools if competitive designs are to be realized. This is particularly true of crankshafts, probably the most analyzed of all engine components. This paper describes the hierarchy of methods used for crankshaft stress analysis with case studies. A computer-based analysis system is described that combines FE and classical methods to allow optimized designs to be produced efficiently. At the lowest level simplified classical techniques are integrated into the CAD-based design process. These methods give the rapid feedback necessary to perform concept design iterations. Various levels of FE analysis are available to carry out more detailed analyses of the crankshaft. The FE studies may feed information to or take information from the classical methods. At the highest level a method for including the load sharing effects of the flexible crankshaft within a flexible block interconnected by nonlinear oil films is described. This method includes the FE modeling of the complete crankshaft and the consideration of its stress field throughout an engine cycle. Fatigue assessment is performed to calculate the distribution of fatigue safety factor on the surface of the crankshaft. This level of analysis can be used for failure investigation, or detailed design optimization and verification. The method is compatible with those used for vibration and oil film analysis.

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Bao, Ke, Ri Dong Liao, and Zheng Xing Zuo. "Stress Calculation of Fillet Rolled Crankshaft in Bending Fatigue Tests." Applied Mechanics and Materials 44-47 (December 2010): 2798–804. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2798.

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The stresses around the fillet of fillet rolled crankshaft section in bending fatigue test are quite complicated, which include the residual stresses induced by fillet rolling process and bending stresses caused by bending fatigue test loads. In this paper, the corresponding three dimensional finite element models of roller- shaft are created and the residual stresses near the fillet of crankshaft section are obtained by flexible-flexible contact computation. Then the transient analysis of bending fatigue test based on modal superposition method is carried out and the bending stresses are got. The results of stress can be used to the bending fatigue design of crankshafts.

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Nozdrzykowski, Krzysztof, and Zenon Grządziel. "Modelling and Simulation Testing of Main Bearing Loads and Strains in Crankshafts Caused by Deviations in the Position of the Shaft Journal and Bearing Axes." Multidisciplinary Aspects of Production Engineering 3, no. 1 (September 1, 2020): 41–56. http://dx.doi.org/10.2478/mape-2020-0004.

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AbstractThis article presents the results of a simulation, testing the variation of main bearing loads and strains in crankshafts caused by geometrical deviations of the bearing system to justify the necessity and purposefulness of measurements of both the shape and axes position deviations of crankshaft journals. Measurements of these deviations at the existing level of applied measuring techniques are significantly limited. The research also accentuates the practical implementation of a measuring system equipped with the so-called flexible support system for the measured object, developed at the Maritime University of Szczecin. This system makes it possible to eliminate elastic deformations of the crankshaft due to its own weight, whereby the measurements of geometrical deformations of the crankshafts can be carried out with appropriate accuracy in conditions corresponding to the non-reference measurements when determining the object measured in counterpoints. The obtained results have fully confirmed the purposefulness of the conducted research and the validity of the theses.

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27

Priebsch, H. H., J. Affenzeller, and S. Gran. "Prediction Technique for Stress and Vibration of Nonlinear Supported, Rotating Crankshafts." Journal of Engineering for Gas Turbines and Power 115, no. 4 (October 1, 1993): 711–20. http://dx.doi.org/10.1115/1.2906764.

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Design analyses of crankshafts, including bearings, are necessary for both the layout of new engines and the modification of existing engines (increased power output, etc.). To improve the existing calculation systems for crankshafts and bearings, AVL has developed a new method. This method enables the coupled vibrations in the torsional, bending, and axial directions, including gyroscopic effects, to be analyzed. For simulation of multibearing effects, the bearing models consider both the hydrodynamic oil film and the stiffness of the bearing structure. The calculation of forced vibrations is carried out using the gas and mass forces acting upon the rotating crankshaft. Comparisons of calculated to measured results demonstrate the accuracy of this calculation technique. The method can be used for passenger car, truck, and medium speed engines. In this paper examples of truck and passenger car engine applications confirm the additional possibilities for the estimation of crankshaft dynamics. Also the improvement of the results obtained from the new technique compared with those from classical calculation methods is described.

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Taraza, D., N. A. Henein, and W. Bryzik. "The Frequency Analysis of the Crankshaft’s Speed Variation: A Reliable Tool for Diesel Engine Diagnosis." Journal of Engineering for Gas Turbines and Power 123, no. 2 (December 6, 2000): 428–32. http://dx.doi.org/10.1115/1.1359479.

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The speed variation of the crankshaft may be easily and accurately measured using a shaft encoder and counting the pulses of the internal clock of the data acquisition system. If the crankshaft would be a rigid body, the variation of its angular speed could be directly correlated to the total gas-pressure torque. Actually, the variation of the crankshaft’s speed has a complex nature being influenced by the torsional stiffness of the cranks, the mass moments of inertia of the reciprocating masses and the average speed and load of the engine. Analyzing only the lower harmonic orders of the speed variation spectrum can filter out the distortions produced by the dynamic response of the crankshaft. The information carried by these harmonic orders permits to establish correlations between measurements and the average gas pressure torque of the engine, and to detect malfunctions and identify faulty cylinders.

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Qin, Wen Jie, D. W. Jia, and Q. Y. Liu. "Multibody System Dynamics Simulation of Loads in Main Bearings of Crankshafts." Materials Science Forum 628-629 (August 2009): 55–60. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.55.

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In this paper, as for the calculation of loads in main bearings in a crankshaft system, multibody system dynamics is used to simulate the dynamic characteristics of the system composed of flexible and rigid bodies, coupled with hydrodynamic lubrication analysis further. The multibody system model with flexible crankshaft of one V8 diesel engine is built in ADAMS software, in which the bearings are modeled as rigid constrained bearings and hydrodynamic bearings respectively. The resulted loads in main bearings using different models are compared. The results show that the deformation of crankshafts has great effect on the values of loads in main bearings, and the bearing loads in different directions tend to uniformity due to the hydrodynamic lubrication.

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30

Ran, Li. "Mechanics Research with Prediction on the Fatigue Life of the Five-Cylinder Emulsion Pump Crankshaft." Advanced Materials Research 738 (August 2013): 163–66. http://dx.doi.org/10.4028/www.scientific.net/amr.738.163.

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In this paper, dynamic mechanics analysis was performed, in order to investigate the maximum forces acting on the crankshaft under working conditions. Then, three dimensional, finite element analyses have been conducted, in an attempt to predict the fatigue crack-initiation locations and lives. The maximum loadings, used in finite element analyses, were analytical obtained, which correspond to the five critical rotational angles of the first crankpin, i.e. = 40 º, 110º, 185 º, 255 º, 325 º. The maximum stress site was found to be approximately on the fillet of the first main journal of the crankshaft. The predicted fatigue life of the crankshafts was obtained by use of a stress-life (S-N) approach.

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Zhao, Yang, and Shou Qi Cao. "Modal Analysis of Large Marine Crankshaft." Applied Mechanics and Materials 271-272 (December 2012): 1022–26. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.1022.

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Based on the modal analysis of finite element theory, in this paper, a 3-D model is built in CATIA. And simplify the details of the characteristics and constraints depengding on working condition. The Lanczons method of ANSYS software is used in the model analysis in order to obtain natural frequencies and vibration mode vectors of the former 15 orders. And the dangerous areas is located in the crankshaft. These provide a theoretical basis for the optimized design of the crankshadft.

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MCADAM, D. J., and G. F. WOHLGEMUTH. "STRESS DISTRIBUTION IN CRANKSHAFTS AND ITS RELATION TO CRANKSHAFT FAILURES." Journal of the American Society for Naval Engineers 36, no. 2 (March 18, 2009): 244–81. http://dx.doi.org/10.1111/j.1559-3584.1924.tb05447.x.

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Jang, Joon, and Woo Chun Choi. "Prediction of angle error due to torsional deformation in non-circular grinding." Mechanical Sciences 12, no. 1 (February 4, 2021): 51–57. http://dx.doi.org/10.5194/ms-12-51-2021.

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Abstract. Non-circular grinding is used in the grinding of crankshafts. In contrast to general grinding, the precision in non-circular grinding is affected by torsional deformation, which results in errors in the grinding depth. In this study, an equation to detect the angle error caused by torsional deformation is established considering the grinding force, the structure of the crankshaft, and the distribution of torque. The angle error due to torsional deformation was found to be up to 0.44 arcsec, which is 5 % of the angle error obtained from previous studies. This difference occurred as the previous studies did not exclusively detect the errors caused by bending deformation and torsional deformation. However, the established equation detects these errors separately. The fundamental cause of the two errors is the change in the structure of the crankshaft caused by bending. Further, the errors were eliminated via steady rest to reduce the bending of the crankshaft. Although the proposed equation is not entirely error-free, the results obtained by the equation have higher accuracy than those of previous studies.

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Safarov, D. T., and A. V. Chekh. "Finding allowance distribution for root and connecting rod necks of crankshaft forging according to coordinate measurements." Omsk Scientific Bulletin, no. 181 (2022): 33–41. http://dx.doi.org/10.25206/1813-8225-2022-181-33-41.

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The article analyzes various ways to ensure the geometric parameters of forgings in the processes of hot volumetric stamping. The fact of high efficiency of coordinate measurements of geometric parameters of forgings has been established to ensure the identification of negative production factors affecting the geometric accuracy of forgings manufacturing. The designs of common control devices and measurement schemes of geometric parameters of the crankshaft forging do not allow performing coordinate measurements of the crankshaft forging in shop conditions. The coordinate scheme, the design of the control device and the method of determining the size of the parameters of the allowance distribution along the root and connecting rod necks of the crankshaft are considered. On the basis of the methodology given in the article for determining the parameters of the allowance distribution, a technique for controlling the geometric accuracy of hot volumetric stamping has been developed, the accuracy of controlling the output parameters of the geometric accuracy of forgings of crankshafts of heavy-duty vehicles has been improved.

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Sun, Jun, Lei Shu, Xianhao Song, Guangsheng Liu, Feng Xu, Enming Miao, Zhihao Xu, Zheng Zhang, and Junwei Zhao. "Multi-objective optimization design of engine crankshaft bearing." Industrial Lubrication and Tribology 68, no. 1 (February 8, 2016): 86–91. http://dx.doi.org/10.1108/ilt-03-2015-0040.

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Purpose – This paper aims to use the crankshaft-bearing system of a four-cylinder internal combustion engine as the studying object, and develop a multi-objective optimization design of the crankshaft-bearing. In the current optimization design of engine crankshaft-bearing, only the crankshaft-bearing was considered as the studying object. However, the corresponding relations of major structure dimensions exist between the crankshaft and the crankshaft-bearing in internal combustion engine, and there are the interaction effects between the crankshaft and the crankshaft-bearing during the operation of internal combustion engine. Design/methodology/approach – The crankshaft mass and the total frictional power loss of crankshaft-bearing s are selected as the objective functions in the optimization design of crankshaft-bearing. The Particle Swarm Optimization algorithm based on the idea of decreasing strategy of inertia weight with the exponential type is used in the optimization calculation. Findings – The total frictional power loss of crankshaft-bearing and the crankshaft mass are decreased, respectively, by 26.2 and 5.3 per cent by the multi-objective optimization design of crankshaft-bearing, which are more reasonable than the ones of single-objective optimization design in which only the crankshaft-bearing is considered as the studying object. Originality/value – The crankshaft-bearing system of a four-cylinder internal combustion engine is taken as the studying object, and the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system is developed. The results of this paper are helpful to the design of the crankshaft-bearing for engine. There is universal significance to research the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system. The research method of the multi-objective optimization design of crankshaft-bearing based on the crankshaft-bearing system can be used to the optimization design of the bearing in the shaft-bearing system of ordinary machinery.

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Ortjohann, Timo, Martin Rebbert, Franz Maassen, and Mike Robers. "Crankshaft simulation." MTZ worldwide 67, no. 5 (May 2006): 30–32. http://dx.doi.org/10.1007/bf03227847.

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Nozdrzykowski, Krzysztof, and Leszek Chybowski. "A Force-Sensor-Based Method to Eliminate Deformation of Large Crankshafts during Measurements of Their Geometric Condition." Sensors 19, no. 16 (August 10, 2019): 3507. http://dx.doi.org/10.3390/s19163507.

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This article describes an innovative method for eliminating deformation in large crankshafts during measurement of their geometric condition. The currently available techniques for measuring crankshaft geometry are introduced and classified according to their applicability and the method of measurement. The drawbacks of the methods have been identified and a solution to these problems has been proposed. The influence of the rigid support of a shaft on its deformation, and thus on the reduction in the accuracy of crankshaft geometry measurements, has also been investigated. The concept and main versions of the proposed measuring system with active compensation for shaft deflection, by means of actuators cooperating with force transducers monitoring the deflection of individual crank journals of a crankshaft being measured, have been presented and the flexible support control system has also been described. The problems relating to the operation of the control system have been furnished along with a way to solve them, including the issue of noise reduction in the signal from the force transducer and the influence of the controller parameters on the operation of the flexible support. The computer system that controls the flexible supports has been briefly characterized, and the performance of the prototype system and the model reference system has been compared. The results have shown that the system is able to effectively eliminate the deflection and elastic deformation of the crankshaft under the influence of its own weight.

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Yakovlev, K. A., and A. V. Latynin. "Increase of wear resistance of crankshafts of timber transport machines." IOP Conference Series: Earth and Environmental Science 875, no. 1 (October 1, 2021): 012062. http://dx.doi.org/10.1088/1755-1315/875/1/012062.

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Abstract The paper considers the technological process of restoration of crankshaft necks by plasma spraying with wear-resistant thermoreacting powder PG-NA80. Wear of the crankshaft necks during operation requires repair, restoration or replacement of this part. As a result of the literature analysis, plasma spraying was found to be the most optimal and relatively inexpensive method of crankshaft recovery. The purpose of our work is to investigate the wear resistance properties of the sprayed coating and the search for op-optimal parameters of its application process. The sprayed coatings were studied according to two parameters: joint strength and wear resistance. For the study, experimental equipment of the plasma spraying laboratory of the department was used. As a result of the experimental study, separate regression equations of the effect of the main factors of plasma spraying on relative wear resistance were obtained. A comparison of physical, mechanical and tribotechnical characteristics showed an improvement in the properties of coatings by 8-12% obtained from thermoreacting powder in comparison with traditional PGSR-4 and PN55T45. Analysis of the obtained research results showed that this technological process can be effectively used to restore worn out crankshafts of forestry vehicles.

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Wichettapong, Kitti, and Sujin Bureerat. "Maximizing Volumetric Efficiency of a Diesel Engine Using an Air Pump to Compress Air-Biogas Mixture into the Engine via Venturi." Applied Mechanics and Materials 148-149 (December 2011): 1051–57. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.1051.

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This paper presents the effect of using a modified air pump to compress the mixture of air and biogas into a single cylinder diesel engine. The crankshafts of both were modified such that two equal size sprockets could be fastened to them. A toothed belt was used to synchronize the crank positions of the pump and diesel engine. By adjusting the angular positions of the crankshaft of the pump at 205 degrees in advance compared to the angular positions of the crankshaft of the diesel engine, the maximum volumetric efficiency of 99.95% could be achieved at 1200 rpm. And when supplementing diesel fuel with biogas via the large venturi, the consumption of 50 cc. of diesel extended to 194.18% at 1200 rpm as compared to running the engine with 50 cc. of diesel alone.

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Ouyang, Lin Hui, Xiao Tao Deng, and Zhu Feng Yue. "Strength Analysis of Crankshaft Interfaces Considering Contact Problem." Advanced Materials Research 945-949 (June 2014): 680–83. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.680.

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Since the work conditions of the crankshaft are complicated and the crankshaft interfaces are very weak, strength analysis of crankshaft interfaces is very important. Three dimensional finite element model of the crankshaft is built for strength analysis of the crankshaft interfaces. The crankshaft has three interfaces. During the analysis, contact problem is taken into account. The results show that the maximal stress of the crankshaft is 535MPa, which is less than the yield limit of 1Cr11Ni2W2MoV steel (993MPa). Therefore, the crankshaft interfaces can not be broken during the work of caterpillar tractor.

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Sun, Jun, and Changlin Gui. "Effect of Lubrication Status of Bearing on Crankshaft Strength." Journal of Tribology 129, no. 4 (June 6, 2007): 887–94. http://dx.doi.org/10.1115/1.2768977.

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There is direct interaction between crankshaft and bearing in an internal combustion engine. The effect of lubrication status of bearing was not considered in the present calculation of crankshaft strength. A given oil film pressure distribution of bearing was generally used as load acted on journal. In this paper, a crankshaft-bearing system was taken as the study object. On the basis of lubrication analysis of misaligned bearing caused by crankshaft deformation, the stress and strength of-crankshaft were calculated using analytical oil film pressure of bearing as the load boundary condition. Crankshaft deformation and bearing load were calculated by whole crankshaft beam-element method. The lubrication of crankshaft bearing was analyzed by the kinetics method. Crankshaft stress was calculated by the finite-element method. The results show that when the effect of crankshaft deformation under load is considered, the offset distribution of oil film pressure of bearing appears and the highest oil film pressure increases remarkably, which result in the stresses of local area on fillet surface of crankshaft journal increase obviously and the safety factor of crankshaft decreases.

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Ouyang, Lin Hui, Xiao Tao Deng, and Zhu Feng Yue. "Strength Checking of Caterpillar Tractor Guide Wheel Crankshaft under Working Condition." Applied Mechanics and Materials 610 (August 2014): 74–77. http://dx.doi.org/10.4028/www.scientific.net/amm.610.74.

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Guide wheel crankshaft used in caterpillar tractor is analyzed under working condition. The crankshaft is made of 45Cr steel. Since the work conditions of the crankshaft are complicated, three dimensional finite element model of the crankshaft is built for strength checking of the crankshaft. Appropriate boundary condition is applied. The results show that the maximal stress of the crankshaft is 728MPa, which is less than the yield limit of 45Cr steel (835MPa). Therefore, the crankshaft can not be broken during the work of caterpillar tractor.

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43

Xia, Chang Gao, Jian Kuan Su, and Mao Hui Pan. "Study on Crankshaft Design Based on CAD/CAE." Advanced Materials Research 201-203 (February 2011): 830–35. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.830.

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This paper presents an integrated method, which is based on the CAD/CAE, for engine crankshaft design. A parametric modeling system of engine crankshaft is established with the CATIA secondary development tools. Taking advantage of the finite element analysis procedure of engine crankshaft strength which is programmed with ANSYS APDL programming language, the parametric loading, automatic solution and result analysis of the crankshaft strength can be realized. Integrating the parametric modeling system of engine crankshaft and the special finite element analysis procedure of the engine crankshaft strength, the three-dimensional digital model of the crankshaft can be generated rapidly. By changing the structure dimension, the crankshaft series design is achieved and the design and analysis can be improved. Therefore, it is helpful to improve the design quality and efficiency of crankshaft and shorten the design cycle.

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Helmiyansah, Helmiyansah. "ANALISA TEGANGAN PADA CRANKSHAFT SEPEDA MOTOR SUZUKI SMASH MENGGUNAKAN SOFTWARE SOLIDWORKS." Jurnal Teknik Mesin 5, no. 3 (March 15, 2017): 16. http://dx.doi.org/10.22441/jtm.v5i3.1212.

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Pentingnya untuk mengetahui besar tegangan maksimum dan faktor keamanan maksimum pada material crankshaft sepeda motor Suzuki Smash dengan bantuan Software Solidworks 2012. Bahan material yang dipilih untuk crankshaft adalah Alloy Steel. Melalui penggunaan software maka akan lebih mudah menampilkan gaya aksi dan reaksi pada crankshaft akibat pembebanan gaya radial yang diterima oleh crankshaft sebesar 1,4 N. Prosedur penelitian di mulai dengan mengukur dimensi crankshaft dari motor Suzuki Smash kemudian dibuatkan model 3D untuk menganalisis. Hasil analisa ditampilkan berupa gambar yang menunjukan distribusi tegangan pada Crankshaft. Dari hasil analisa software disimpulkan bahwa tegangan maksimum pada Crankshaft sebesar 8,74 x10-3 N/mm² dengan faktor keamanan terendah sebesar 8,09 x 1012.

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Zhang, You Jun, Nan Zhao, and Jie Lu. "Finite Element Modal Analysis of Reciprocating Compressor Crankshaft Based on ANSYS Workbench." Applied Mechanics and Materials 488-489 (January 2014): 1208–10. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.1208.

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Crankshaft is one of the important parts of reciprocating compressor. It takes a large reciprocating compressor crankshaft as the research object. First it establishes the three-dimensional solid model of the crankshaft by the software Pro/E. Then it contacts the Pro/E and ANSYS Workbench by the interface to establish the finite element model of the crankshaft. After taking the modal analysis and calculations of the crankshaft in the ANSYS Workbench module, it obtains the foundation for the design of the crankshaft structure.

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Ang, Yoon Zuan, and Pei Xuan Ku. "Study on Failure Analysis of Crankshaft Using Finite Element Analysis." MATEC Web of Conferences 335 (2021): 03001. http://dx.doi.org/10.1051/matecconf/202133503001.

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Crankshaft is one of the crucial parts for the internal combustion engine which required effective and precise working. In this study, the aim of the study is to identify the stress state in the crankshaft and to explain the failure in automotive crankshaft and fatigue life of crankshaft by using finite element analysis. The 3D solid modelling of the crankshaft model was designed and developed using SolidWorks. A static structural and dynamic analysis on an L-twin cylinder crankshaft were used to determine the maximum equivalent stress and total deformation at critical locations of the crankshaft. The model was tested under dynamic loading conditions to determine fatigue life, safety factor, equivalent alternating stress and damage using the fatigue tool. The results obtained from this study indicated that the crankshaft has obvious fatigue crack which was belongs to fatigue fracture. The fatigue fracture developed was only attributed to the propagating and initiate cracks on the edges of the lubrication hole under cyclic bending and torsion. Overall, the crankshaft is safe for both static and fatigue loadings. In dynamic analysis, the critical frequency obtained in the frequency response curve should be avoided which it may cause failure of the crankshaft.

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Yu, Zhi Min, Shi Hai Zhang, and Shi Xun Jiang. "Research for the Crack Dynamic Monitoring of Marine Diesel Engine." Applied Mechanics and Materials 556-562 (May 2014): 3107–11. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.3107.

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crankshaft is one of the most important parts and crankshaft fatigue fracture is a major failure. In order to alert fatigue fracture of crankshaft to prevent accidents, diesel engine crankshaft dynamic monitoring based on the actual situations of diesel engines, significance of dynamic balance for marine diesel engine crankshaft system is discussed and as well vibration monitoring and field dynamic balance system for diesel engine crankshaft system is constructed. The least square method is applied to fit fundamental frequency vibration signals of crankshaft system and the field dynamic balance strategy is designed on the basis of the influence coefficient method. The feasibility of the dynamic balance system is tested through experiments in the paper.

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Ding, Yu, Cong Biao Sui, and Yuan Yao. "Dynamic Crankshaft Strength Calculation of Diesel Engine Using Simulation Techniques." Advanced Materials Research 860-863 (December 2013): 1699–702. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.1699.

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Crankshaft is one of the most important parts in diesel engine. The fatigue failure and fracture of crankshaft may lead to damage to the other parts, even some accidents. Recently with the increasing requirement of engine power and engine reliability, the investigation of the crankshaft strength becomes more important. Since during the engine work process, the extremely complicated force are loaded on the crankshaft and different vibration caused by torque, bending, etc., the crankshaft may create the resonance and appended dynamic stress in the working frequency range, which will be easy to bring about the bending and torsion damage after short work period. In this paper, the traditional algorithm on the basis of MATLAB/SIMULINK software is used to carry out the dynamic calculation and analysis for a certain type of diesel engine crankshaft. The crankshaft stress state and its variation are analyzed, and the results of the bending moment, torsion versus crank angle are obtained. Finally, the fatigue strength of crankshaft is checked and the safety factor is calculated to verify the crankshaft reliability.

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Liu, Song. "Foundry and Development of Ductile Iron Crankshaft." Open Mechanical Engineering Journal 9, no. 1 (October 7, 2015): 791–96. http://dx.doi.org/10.2174/1874155x01509010791.

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In this paper, we introduce the production of ductile iron crankshaft of the engine status quo and development. Ductile iron crankshaft discussed smelting process, alloying and manufacturing process mode. This paper focuses on the application of isothermal hardened spheroidal graphite cast iron in the crankshaft, especially its application in the power of the engine crankshaft. We also introduce a way for casting production technique of high strength-high toughness nodular iron crankshaft. In order to increase the strength, toughness of the nodular iron crankshaft and improve casting quality, a series of investigations were carried out on the mini-amount alloying technique, control technique of iron melt eutectic point, nodularizing treating technique, curved parting method and the structure normalization process and, as the result, the high-strength and high toughness nodular iron crankshaft was successfully developed. The tensile strength of the crankshaft was increased from original 872 MPa to 927 MPa.

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S. Abdulhussain, Uzaldin, Taj Elssir Hassan, and Maisara Mohy Eldin Gasim. "Theoretical Performance Comparison between Inline, Offset and Twin Crankshaft Internal Combustion Engine Models." FES Journal of Engineering Sciences 2, no. 1 (November 6, 2006): 26. http://dx.doi.org/10.52981/fjes.v2i1.91.

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Twin crankshaft is a new engine arrangement introduced to overcome cylinder’s liner wear problems encountered in the conventional inline crankshaft engine due to the effect of the side thrust force. The offset crankshaft arrangement was also introduced to solve the same problem. In this work a computer programs was built to obtain the theoretical performance comparison between the three engines arrangements (inline, twin and offset crankshaft engines), and compared the theatrical performance with the experimental results, which done to the engine’s models. The study results show that the twin crankshaft engine model exhibited no thrust force, and that the thrust force in the offset crankshaft model is smaller than that in the inline crankshaft engine model. These agree with experimental results obtained from the same engine model.

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Journal articles on the topic 'Crankshaft'

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