Journal articles: 'Crankshaft mechanism'

1

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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2

Kioschos, Hans C., Marc A. Asher, Richard G. Lark, and E. James Harner. "Overpowering the Crankshaft Mechanism." Spine 21, no. 10 (May 1996): 1168–73. http://dx.doi.org/10.1097/00007632-199605150-00008.

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3

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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4

FUJIWARA, Takanori, Masahiro MIYAGAWA, and Shinya TSUKAMOTO. "Analysis of the Crankshaft Pin Grinding Mechanism with CNC Crankshaft Pin Grinder." Proceedings of the JSME annual meeting 2004.4 (2004): 289–90. http://dx.doi.org/10.1299/jsmemecjo.2004.4.0_289.

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5

Liu, Can, Shan Shan Shen, and Chun Liang Zhang. "Dynamics Influence of Joints with Clearance on Complex Mechanism." Applied Mechanics and Materials 681 (October 2014): 15–18. http://dx.doi.org/10.4028/www.scientific.net/amm.681.15.

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The effects of joints with clearance between Crankshaft and cycloidal wheel on needle pendulum gear drive in 2K-V reducer are considered by Virtual Prototyping. A comparative analysis reveals angular velocity, acceleration change and the loading conditions of the input and output components. Joggle force between Crankshaft and cycloidal wheel are also analysized. It is a convenient way for stiffness design of 2K-V reducer.

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6

Hongqiang, Wan, Han Peiying, Ge Shuai, Fancong Li, and Zhang Simiao. "Mechanical Vibration Mechanism Motion Simulation of Ultrasonic Composite Vibration Polishing Equipment." MATEC Web of Conferences 237 (2018): 01014. http://dx.doi.org/10.1051/matecconf/201823701014.

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In order to design a kind of mechanical vibration part with stable motion in ultrasonic composite vibration polishing equipment. firstly, the main working principle of ultrasonic composite vibration polishing equipment is briefly introduced. Secondly, the mechanical vibration structure of the design is analyzed theoretically, again, using ADAMS software to simulate the crankshaft connecting rod piston mechanism. When the crankshaft speed is 750r/min, the stroke of the piston is 90mm, which is similar to the theoretical analysis value. Finally, using ANSYS Workbench software to analyze the crankshaft statics. The analysis shows that the design of the mechanical vibration structure is reasonable, which provides a theoretical basis for the study of the mechanical vibration structure of ultrasonic composite vibration polishing equipment.

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7

Nehme, H., N. G. Chalhoub, and N. Henein. "Development of a Dynamic Model for Predicting the Rigid and Flexible Motions of the Crank Slider Mechanism." Journal of Engineering for Gas Turbines and Power 120, no. 3 (July 1, 1998): 678–86. http://dx.doi.org/10.1115/1.2818199.

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A continuous model is developed to predict the rigid and flexible motions of the piston assembly/connecting rod/crankshaft mechanism for a single cylinder engine. The model accounts for the torsional vibration and the out-of-plane transverse deformation of the crankshaft along with the out-of-plane transverse deformation of the connecting rod. The eigenvalue problem of the crankshaft, including the counterweights, the flywheel, and the crank gear, is solved to obtain the analytical expressions for the elastic modes of the crankshaft. The resulting mode shapes are then used in the assumed modes method to approximate the structural flexibility terms. The differential-algebraic equations of motion are obtained by implementing the Lagrange principle. The digital simulation results illustrate the role played by the topological nonlinearities inherent in the system and reveal the relationships with which the rigid and flexible motions of the crank-slider mechanism would interact.

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8

Yu, Bin-yan, Quan-ke Feng, and Xiao-ling Yu. "Dynamic simulation and stress analysis for reciprocating compressor crankshaft." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 4 (July 9, 2012): 845–51. http://dx.doi.org/10.1177/0954406212453523.

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With the continuous trend toward high speed and large size, the reciprocating compressor crankshaft faces more serious potential threat of crack due to vibration. Therefore, early stress analysis of the crankshaft must be done thoroughly in the design stage. This article introduces a method, which combines flexible body dynamic and finite element analysis to calculate stress of the crankshaft. In this method, the load variation with time is obtained by flexible body dynamics simulation of crank and connecting rod mechanism. After that loads are loaded on finite element model of the crankshaft, and then the stress of the crankshaft is calculated in time domain. This stress can be utilized to do fatigue analysis and predict the life of crankshaft. Using this method, stress of a practical crankshaft, belonging to 6M51 reciprocating compressor, is calculated. The result showed that the maximum von Mises stress is 158 MPa, and the estimated life, which was calculated by Palmgren–Miner linear damage accumulation theory, is 2.0230e + 007 hours.

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9

Huang, Yi Cheng, and Fong You Lee. "Dynamic Balancing Modal Analysis and Vibration Suppressing Design for Reciprocating Compressor Crankshaft." Applied Mechanics and Materials 157-158 (February 2012): 996–99. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.996.

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The purpose of this study is to improve the problem of vibration which occurs in a running reciprocating compressor, by determining an optimal crankshaft counterweight and narrowing the movement trajectory of the crankshaft connecting rod mechanism. An analytical solution method is applied to satisfy the requirements for vibration reduction. Use of finite element software is to simulate the modality and deformation of crankshaft under various conditions of counterweight. Modal testing shows a difference of less than 6 % between the simulation and the experimental results. After the crankshaft counterweight is machined and installed, the new crankshaft is able to reduce compressor vibrations from 32 mm/s down to 15.8 mm/s and noise reduction of 3 dB. This study can provide information pertaining to the design process and assessment to any future new compressor designs.

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10

Liu, Ying, Hong Xin Zhang, and Kai Yin. "Multidisplinary Optimization of Crank-Link Mechanism of HCPE Based on iSIGHT." Applied Mechanics and Materials 300-301 (February 2013): 99–103. http://dx.doi.org/10.4028/www.scientific.net/amm.300-301.99.

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The technology of multidisciplinary design optimization was elaborated, and the structure principle and dynamic model of HCPE were briefly presented. Based on the minimum volume, the collaborative optimization model of crank-link mechanism was constructed. The approximate response surface models of connecting rod and crankshaft were established by means of ANSYS calculation. By combined with iSIGHT software, the collaborative optimization system was realized, and the calculation speed was improved. The optimized volume decreased by 0.803% under the premise that couldn't change the crankshaft counterbalance. So the mass of the engine is reduced and the performance is improved.

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11

Zhang, M., Yun Huang, and L. Zhang. "Research on the Mechanism of Coordinate Polishing Crankshaft Crankpin with Abrasive Belt." Key Engineering Materials 487 (July 2011): 457–61. http://dx.doi.org/10.4028/www.scientific.net/kem.487.457.

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Under the conditions of crankshaft uniform rotation, the schematic diagram of coordinate polishing crankpin was analyzed and found that the grinding time and speech changed, when the abrasive grinded crankpin. At the same time, the surface roughness was the relevant with the grinding time, grinding for a long time the roughness value was low, grinding time was short then the roughness value was high. In order to ensure that the surface roughness was homogeneity, so that the abrasive grinded the grinding point in the same time, in other words, the abrasive grinded crankpin in the constant velocity. And then the abrasive grinding crankpin was analyzed in the constant velocity, the crankshaft angle was draw the relationship between horizontal displacement and the swing angle. Simultaneity, adopted the level cylinder and the oscillating cylinder mutual moving, that resulted in the mechanism following the rotation of crankshaft back and forth movement, it was due to the weight of mechanism and the lag of the cylinder, and finally the mechanism of lag error was analyzed.

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12

Zainudin, Mohd Farid, Abu Bakar Rosli, Gan Leong Ming, Tanti Zanariah Shamshir Ali, and Billy Anak Sup. "Design and Stress Simulation of Crankshaft for Slider-Crank Drive Stirling Engine." Applied Mechanics and Materials 699 (November 2014): 678–83. http://dx.doi.org/10.4028/www.scientific.net/amm.699.678.

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In this present work, the design and simulation of crankshaft for multi-cylinder Stirling engine is studied based on finite element analysis. The proposed crankshaft design is based on the typical crosshead slider-crank mechanism that is being used with the consideration of design needs for multi-cylinder Stirling engine. The study focused on the piston-crankshaft assembly that is subjected to compression load in Stirling cycle. Based on the simulation results, the maximum von Mises stress for crankshaft model varies from 0.82 MPa at 1 bar charge pressure to 1.65 MPa at 20 bar charge pressure. Minimum factor of safety is founded to be 33 with maximum deformation under maximum charge pressure. For piston-crankshaft assembly load, minimum factor safety of 2 was observed with maximum compression pressure for minimum charge pressure. The results indicate no yielding and structural failure under compression load case, can be satisfied.

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13

Silva, F. S. "An Investigation into the Mechanism of a Crankshaft Failure." Key Engineering Materials 245-246 (July 2003): 351–58. http://dx.doi.org/10.4028/www.scientific.net/kem.245-246.351.

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14

Bai, Shu Zhan, Yu Ping Hu, Hai Long Zhang, Sheng Wei Zhou, Ying Jun Jia, and Guo Xiang Li. "Failure Analysis of Commercial Vehicle Crankshaft: A Case Study." Applied Mechanics and Materials 192 (July 2012): 78–82. http://dx.doi.org/10.4028/www.scientific.net/amm.192.78.

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A failure analysis has been conducted on a diesel engine crankshaft used in a commercial vehicle, which is made from 42CrMo forging steel, and the crankshaft was after induction hardening process. The fracture occurred between the 4th journal and the 4th crankpin, fracture section indicates that fatigue is the dominant mechanism of failure for this crankshaft. In order to find the failure causes, the dimension of journal boss fillet, material chemical compositions, surface hardness and depth of hardness layer were evaluated. Chemical compositions of crankshaft material, surface hardness and the depth of hardness layer are within the specified range, however the dimension of journal boss fillet is less than specified, and the transition zone of hardness layer was found on the journal boss fillet. Heavy segregation and many non-metallic inclusions aggregate zones were found from metallographic, these would lead to the reduction of endurance bending strength. FEA analysis results suggest that the dimension of journal boss fillet have an important effect on the stress and stress amplitude of the crankshaft. So the disqualification machining and material property are the main causes for the crankshaft fatigue fracture.

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15

Boretti, Albert. "Super Turbocharging the Direct Injection Diesel engine." Nonlinear Engineering 7, no. 1 (March 26, 2018): 17–27. http://dx.doi.org/10.1515/nleng-2017-0067.

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Abstract The steady operation of a turbocharged diesel direct injection (TDI) engine featuring a variable speed ratio mechanism linking the turbocharger shaft to the crankshaft is modelled in the present study. Key parameters of the variable speed ratio mechanism are range of speed ratios, efficiency and inertia, in addition to the ability to control relative speed and flow of power. The device receives energy from, or delivers energy to, the crankshaft or the turbocharger. In addition to the pistons of the internal combustion engine (ICE), also the turbocharger thus contributes to the total mechanical power output of the engine. The energy supply from the crankshaft is mostly needed during sharp accelerations to avoid turbo-lag, and to boost torque at low speeds. At low speeds, the maximum torque is drastically improved, radically expanding the load range. Additionally, moving closer to the points of operation of a balanced turbocharger, it is also possible to improve both the efficiency η, defined as the ratio of the piston crankshaft power to the fuel flow power, and the total efficiency η*, defined as the ratio of piston crankshaft power augmented of the power from the turbocharger shaft to the fuel flow power, even if of a minimal extent. The energy supply to the crankshaft is possible mostly at high speeds and high loads, where otherwise the turbine could have been waste gated, and during decelerations. The use of the energy at the turbine otherwise waste gated translates in improvements of the total fuel conversion efficiency η* more than the efficiency η. Much smaller improvements are obtained for the maximum torque, yet again moving closer to the points of operation of a balanced turbocharger. Adopting a much larger turbocharger (target displacement x speed 30% larger than a conventional turbocharger), better torque outputs and fuel conversion efficiencies η* and η are possible at every speed vs. the engine with a smaller, balanced turbocharger. This result motivates further studies of the mechanism that may considerably benefit traditional powertrains based on diesel engines.

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16

Bartoš, Josef. "A study of decay mechanism of alkyl macroradicals in polyisobutylene." Collection of Czechoslovak Chemical Communications 50, no. 8 (1985): 1699–713. http://dx.doi.org/10.1135/cccc19851699.

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The macroradicals generated in polyisobutylene by γ-radiolysis at 77 K have been studied from the point of view of their structure and reactivity with the use of the ESR method and various kinetic models. In the region of 223-243 K a single type of macroradicals is only present, ~C(CH3)2CHC(CH2)2~, these radicals being decayed according to the second order kinetics with effective activation energy of 77.5 kJ mol-1. This result was interpreted within the model of diffusion-controlled reactions using the activation energy approach. Various potential mechanisms of transport of the centres have been tested on the molecular level. Approach of the reactants is controlled by intermolecular hydrogen transfer connected with quasi-crankshaft motions of the chain segments, and at suitable conditions, especially at early stages of the decay, it is possible also to consider a physical mechanism of approach of near-standing reactants with participation of crankshaft motions of the chain segments.

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17

Sun, Yu, Chen Hai Guo, and Xiao Hui Cao. "The Research on Regularity of Residual Stress Distribution of Engine Crankshaft Fillet Rolling." Advanced Materials Research 512-515 (May 2012): 2047–50. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2047.

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The paper sets up the Finite Element Model on the basis of crankshaft fillet rolling experiment and its mechanism. And then the paper shows the distribution of the residual stress in different depths of rolled crankshaft fillet through numerical simulation. It is found that the fatigue strength can greatly be produced by the method of the engine crankshaft fillet rolling in most of fillet areas; Simultaneously, two strips of tensile stress which is related to reduce the crankshaft fatigue strength will be generated in the peripheries. The tensile stress strips only emerge in the surface layer of the fillet, and then mainly disappear in the depths of 0.4mm below the surface layer. The paper concludes that the main reason of strips of tensile stress lies on the transition between the deformed region and the non-deformed reformed region after trolley wheel pressure is imposed on through a further research.

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18

Xie, Xibin, Jingkui Ruan, and Xiang Wang. "Dynamic Analysis of Crankshaft and Link Mechanism in Air Compressor." Information Technology Journal 12, no. 24 (December 1, 2013): 8293–97. http://dx.doi.org/10.3923/itj.2013.8293.8297.

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19

Shao, Yi Min, and Liang Hua Wan. "Simulation on Vibration of Engine Crank-Connecting Rod Mechanism with Manufacturing Errors Using ADAMS." Applied Mechanics and Materials 34-35 (October 2010): 1088–91. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1088.

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The present study investigates the dynamic response of single-cylinder reciprocating engines. In particular, simplified models of the crank-connecting rod mechanism are examined, which take into the flexibility of the crankshaft. Crankshaft, connecting rod and piston are major parts of the crank-connecting rod mechanism, and their size, mass, centroid location parameters are required precisely in manufacturing process. However, manufacturing error cannot be avoided completely in practical manufacturing process, and it would lead to different vibration performance of engine. Therefore, understanding the effect of manufacturing error on the vibration performance of engine is the aim of this paper. In order to obtain dynamic characteristics of engine, both rigid and flexible body dynamics simulation were done by using software ADAMS.

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20

Liu, Chang Zhen, Yong Gang Hao, Xiao Fei Chen, and Xu Dong Li. "Fracture Analysis of a Crankshaft Used for Heavy-Duty Truck." Applied Mechanics and Materials 654 (October 2014): 61–64. http://dx.doi.org/10.4028/www.scientific.net/amm.654.61.

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A failure investigation for a diesel engine crankshaft has been conducted which was used for truck in this paper, which is made from 42CrMo steel. The fracture occurred on the crank web between the 4th crankpin and the 4th journal, the fracture section indicates that fatigue is the dominant mechanism. The dimensions, chemical compositions of material and surface hardness were evaluated in order to find the failure causes. Chemical compositions, the depth of hardness layer and surface hardness are qualified; however, there are transition zone of hardness layer on the journal boss fillet, the dimensions of journal boss is not qualified, it less than specified dimension, and many non-metallic inclusions aggregate zones and heavy segregation were found from metallographic photo, these would reduce the tensile strength. FEA analysis is also used to analysis the strength of this crankshaft, and the results suggest that the dimension of journal boss fillet is the key dimension, which has an important effect on the strength of the crankshaft. So the disqualified machining dimensions, material property are the main reasons for the fraction of this crankshaft.

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21

Kukuča, Pavol, Dalibor Barta, Robert Labuda, and Tsvetomir Gechev. "Engine with unconventional crank mechanism FIK1." MATEC Web of Conferences 244 (2018): 03004. http://dx.doi.org/10.1051/matecconf/201824403004.

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The geometry and kinematics of unconventional engine mechanism FIK1 are described in the paper. Transformation of the piston linear movement to rotational movement is done by a swinging board, a baseboard and a crankshaft. The paper describes the trajectory and acceleration of an observed point on the swinging board in all three planes as well as the kinematics of the piston movement. The principle of the unconventional mechanism FIK1 is protected by patents No. 283742 and No. 283743. A mathematical model of the mechanism and some significant results are presented.

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22

Zhang, Xiao Xun, Chi Ying Ma, Yun Hua Sun, and Fang Ma. "Stress Analysis and Failure Mechanism of H13 Steel Hot-Forging Die for Automobile Engine Crankshaft." Applied Mechanics and Materials 217-219 (November 2012): 1994–97. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1994.

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The hot forging process of automobile engine crankshaft was simulated in the present study on the basis of the finite element software DEFORM-3D. The materials of die and crankshaft workpiece are H13 steel and L1438 steel, respectively. The material flow in the die, contact pressure distribution and temperature distribution of the die were investigated. The interaction forces between the workpiece and the dies were mapped onto die faces to serve as load boundary conditions for die stress analysis. The results showed that the die stress reduces with increasing temperature and increases with increasing strain rate. Such behavior is likely associated with flow stress of the workpiece, which reduces with increasing temperature and increases with increasing strain rate. High flow stress results in high die stresses and hence more easily leads to die failure.

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23

MUTO, Yoshihiko, Yasuaki SUZUKI, Yoshiyuki KIDOGUCHI, and Kei MIWA. "905 Combustion Characteristics of Spark Ignition Engine Employing Z-crankshaft Mechanism." Proceedings of Conference of Chugoku-Shikoku Branch 2005.43 (2005): 323–24. http://dx.doi.org/10.1299/jsmecs.2005.43.323.

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24

Abd Rahman, Fatimah, Amesh Eromal Gomes, Noor Ain Kamsani, Roslina Mohd Sidek, Shaiful Jahari Hashim, Fakhrul Zaman Rokhani, Mohd Suffian Zamali, and Farhan Mohamed Ali. "Random missing tooth error detection in crankshaft function of an engine control unit." Journal of Mechanical Engineering and Sciences 14, no. 2 (June 23, 2020): 6895–905. http://dx.doi.org/10.15282/jmes.14.2.2020.28.0540.

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Automotive industry is migrating to electronic based control which has promoted the evaluation and enhancement of engine control performance using electronic components in the research field. Modern engines are controlled by Engine Control Unit (ECU) where not only functions and control systems are in placed, but also the fail-safe mechanisms must be integrated in the ECU to ensure user safety when an error occurred. This work focuses on developing a reliable crankshaft function in an ECU using field-programmable gate array (FPGA). ABa test is carried out and the number of occurrences at unintended location are being monitored in the system to detect the random missing tooth. The reliability of the function is tested by evaluating response of the crankshaft function in an ECU when an unexpected missing tooth occurs during its operation. The developed system is able to detect the random missing tooth on a crank trigger wheel at an accuracy of 100% when the wheel is on a run at a constant wheel rotational speed. It also flags error message for further processing in other functional units of the ECU as a safe-fail mechanism for the system. Implementation of the random missing tooth detection in the crankshaft function is shown to work in the system which is developed using Verilog code

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25

Zhang, H. Y., S. Qu, C. Dong, C. M. Fu, Q. S. Zang, and Z. F. Zhang. "Failure Analysis of a Diesel Engine Crankshaft." Practical Metallography 58, no. 5 (May 1, 2021): 282–98. http://dx.doi.org/10.1515/pm-2021-0020.

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Abstract A six-cylinder crankshaft in a 12L diesel engine was locked after testing for about 840 hours in the bench test. The fractography investigation indicates that fatigue is the dominant failure mechanism of the crankshaft. It is found that the fatigue crack mainly initiated at the fillet of the crankweb between the 6th main journal and 6th crankpin. The fatigue crack initiation area lies outside the induction surface hardened zone. From detailed metallographic inspection, abnormal microstructure containing Widmannstatten was found in the fatigue crack initiation area and the 5th main journal, while that was not found at the severely deformed crankweb. Since the region containing Widmannstatten has lower hardness, the root cause of the failure may be that the abnormal microstructure lowered the fatigue strength at the stress concentrated fillet. The crankshaft prematurely fractured under the complex stress condition in the bench test.

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Kukuča, Pavol, Dalibor Barta, Ján Dižo, and Jacek Caban. "Piston kinematics of a combustion engine with unconventional crank mechanism." MATEC Web of Conferences 244 (2018): 03006. http://dx.doi.org/10.1051/matecconf/201824403006.

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The article deals with a theoretical solution of kinematic variables describing the movement of a combustion engine piston with unconventional mechanism FIK protected by patents No. 283742 and No. 283743 [1]. The course of the path, the velocity, and the acceleration were calculated to assess the dynamic properties of the unconventional mechanism, which transform the piston linear movement to rotational movement by using a swinging board, a baseboard and a crankshaft.

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Wang, Xiao Jun, and Zhao Hui Liu. "Design of High Speed NC Crankshaft Grinding Machine." Applied Mechanics and Materials 33 (October 2010): 17–21. http://dx.doi.org/10.4028/www.scientific.net/amm.33.17.

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Siemens AG SINUMERIK820 is used for high-speed numerical control (NC) grinder, which integers CNC and PLC and is safe and reliable. The mechanism of high speed spindle is that the motor and spindle are combined as one body; rapid feedrate is realized by steep-lead ball screw and increasing feed servo motor rotation speed; the wear particles of wheel are mainly of cubic Boron Nitride and diamonds; and the machine is more stable and reliable.

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Jin, Sui Ying, Ning Wu, Yu Jing Jia, and Guang Zhen Cheng. "Crank and Slide Rebar Cutting Machine." Applied Mechanics and Materials 189 (July 2012): 330–33. http://dx.doi.org/10.4028/www.scientific.net/amm.189.330.

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The project designed the rebar cutting machine which commonly used in the construction industry. The main working principle of the rebar cutting machine is that the motive power provided by the motor, after reducing the speed through the primary belt transmission and secondary gear transmission decelerator, it will drive the crankshaft rotating, and the crankshaft drives the connecting rod to make the slide and moving blade do the reciprocating linear motion in the slipway, and select the crank-slider mechanism as the mechanical actuator. In order to cut rebar, we will make the activity blade and fixed blade staggered.

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29

Fujiwara, T., Shinya Tsukamoto, and M. Miyagawa. "Analysis of the Grinding Mechanism with Wheel Head Oscillating Type CNC Crankshaft Pin Grinder." Key Engineering Materials 291-292 (August 2005): 163–70. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.163.

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In this study, the crankshaft pin grinding mechanism, which is carried out with wheel head oscillating type CNC crankshaft pin grinder, is theoretically analyzed. In order to maintain grinding process, the pin rotates and also rocks along wheel working surface, because the wheel head oscillates with journal rotation. Then, it is made clear that cylindrical plunge grinding process progresses in the pin grinding process for the first time. Therefore, grinding speed ratio, which is defined as ratio of substantial pin surface speed to wheel surface speed, is firstly formulated. Secondly, undeformed chip size generated by a grain is estimated with the grinding velocity ratio. Finally, the grinding performance is predicted with experimental equations, which obtained previous study. By this simulation, it is made clear that dimensional accuracy and also surface roughness vary on whole of the pin surface with constant journal rotation grinding method. On the contrary, deviations of both the dimensional accuracy and the surface roughness are reduced with controlled speed ratio grinding method, in which journal rotation speed is adequately controlled.

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30

Li, Wen Hui, Sheng Qiang Yang, Shi Chun Yang, and Hong Ling Chen. "Research of Uniformity and Effect on Crankshaft Barrel Finishing." Advanced Materials Research 97-101 (March 2010): 4120–23. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.4120.

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At present, crankshafts are finished mostly by abrasive cloth and manual steel brush, which is not ideal on finishing quality, efficiency, cost and cleanness degree. So a new process, horizontal spindle barrel finishing, is developed. Based on its finishing mechanism, factors and effect affecting finishing uniformity are analyzed by theory and experiment, finishing effect is defined, which provides basis for parameters selection of crankshafts barrel finishing.

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31

Plotnikov, P. I., and J. Sokołowski. "Dynamics of a Crankshaft Mechanism under the Pressure of a Viscous Gas." Proceedings of the Steklov Institute of Mathematics 310, no. 1 (September 2020): 220–49. http://dx.doi.org/10.1134/s0081543820050181.

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32

Wu, Jufei, and Qian Wang. "Finite Element Analysis of New Crankshaft Automatic Adjustment Mechanism of Pumping Unit." IOP Conference Series: Materials Science and Engineering 274 (December 2017): 012006. http://dx.doi.org/10.1088/1757-899x/274/1/012006.

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33

Yin, Bi Feng, Jiang Guang He, Yi Xu, and Yong Qiang Li. "The Novel Design of Full-Balancing Mechanism for Single-Cylinder Diesel Engine." Applied Mechanics and Materials 37-38 (November 2010): 1520–24. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.1520.

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One new sliding-block balancing mechanism is proposed for the single-cylinder diesel engine. In the new mechanism, the sliding block is installed against the engine piston. The reciprocation trajectory of sliding block is collinear with the piston trajectory, while sliding block and piston move in the opposite direction, just like two opposite crank connecting rods. The new mechanism includes the crankshaft, connecting rod ring, the slider and the guide components. Through the bearing, connecting rod is installed in the eccentric journal of the crankshaft. The circular connecting rod is in the accurate guiding surface of the slider; and the guide pins are in the guide groove. Guide rod connects with supporting shaft through the guide hole of the slide. The optimized parameters for the sliding block show that the ratio of eccentric distance of the eccentric journal to the length of the connecting rod is equal to the ratio of crank radius to connecting rod length. The appropriate results can balance both the centrifugal inertia force and the reciprocating inertia force generated by piston group. Even the complete balance of the first and second-order reciprocating inertia forces can be obtained, which can reduce the vibration and noise of diesel engine.

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Doughty, S., A. J. Smalley, and B. F. Evans. "Internal Dynamic Force Analysis for V-Type Engine/Compressor With Articulated Power Cylinder Connecting Rod Mechanism." Journal of Engineering for Gas Turbines and Power 111, no. 3 (July 1, 1989): 530–35. http://dx.doi.org/10.1115/1.3240285.

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This paper presents a systematic analysis of the internal dynamic forces within a V-engine/compressor with articulated power cylinders. All inertial terms are included in the formulation, which is solvable for the crankshaft torque and all reactions. After formulating the necessary description, the results are applied to two case studies involving pipeline compressor units.

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Xiao, Mao Hua, Fei Yang, Zun Mang Ke, Si Hong Zhu, and Deng Song Xiao. "The Design of the Drive System of the Crank Underdrive Quick Presses." Key Engineering Materials 584 (September 2013): 189–93. http://dx.doi.org/10.4028/www.scientific.net/kem.584.189.

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Based on production needs, a main transmission mechanism of underdrive speed press was designed in this paper. The design of the main transmission mechanism is the improvements and alternative of sine institutions slider-crank mechanism made. Underdrive and dual slider mechanism were designed, in order to achieve the presses punching process. The nominal pressure angle and the nominal torque were calculated. A preliminary calculation and design of the crankshaft, bearings, slider of the main drive mechanism. Ensure reliable operation and to provide a basis for the optimization design.

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Zhang, Yu Feng, Min Rui Li, and Jian Cheng Wang. "Study on Surfacing Technics of 18CrNiWA Engine Crankshaft Surfacing Welding with Flux-Cored Wire." Advanced Materials Research 926-930 (May 2014): 246–49. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.246.

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It discussed repairing the worn engine crankshaft with chromium series metal powder-cored wire. The Mo, Mn, V, Ti metal powder and the SiC ultrafine particles, WC nanopowder added in chromium series metal powder-cored wire. That made the surfacing layer obtained high bonding strength, high hardness, and obtained high fracture toughness. The result indicated the SiC ultrafine particles/WC nanopowder could promotion the in-situ reaction in the surfacing layer, formed the dissemination strengthening, the melting strengthening and so on multi-mechanism strengthening effect. SiC and the metal matrix was not merely the mechanical bond, the partial regions were by the chemical bond. That realized in the structure continuity. And the repaired crankshaft surface wear-resisting disposition enhanced 24% than the original.

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Salahutdinov, Il'mas, Andrey Gluschenko, Denis Molochnikov, Sergey Petryakov, and Ilnar Gayaziev. "THEORETICAL JUSTIFICATION OF THE ASSESSMENT OF THE TECHNICAL CONDITION OF THE INTERNAL COMBUSTION ENGINE BY THE VALUE OF THE TOTAL EMF IN FRICTION PAIRS." Vestnik of Kazan State Agrarian University 16, no. 1 (April 15, 2021): 90–95. http://dx.doi.org/10.12737/2073-0462-2021-90-95.

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The research was carried out in order to determine the possibility of assessing the technical condition of an internal combustion engine (ICE) by the value of the total electromotive force (EMF) that occurs in its friction pairs. The contact area of the rubbing parts and the gap between them affects the electrical resistance in contact, and, accordingly, the value of the resulting EMF according to the established dependence. To confirm the theoretical results, studies were carried out on the UMP-417 engine using a developed measuring complex and a manufactured current-collecting device mounted on the output end of the engine crankshaft. With the operating mode corresponding to the speed of the crankshaft 800 min-1, the total value of the EMF in the measurement circuit cylinder liner-engine block-crankshaft-current collector (TSU) was 83...95 mV. At the same time, in the piston–cylinder liner friction pair, it was equal to 37 ... 47 mV, and in the crank mechanism friction pairs - 46...48 mV. The correspondence of the results of the theoretical calculation and bench studies of the values of the EMF value for a real internal combustion engine was: when measured using the Fluke device for the friction unit of the cylinder liner-piston – 62.1 %, for the friction units of the crank mechanism (root neck-connecting rod, connecting rod neck-connecting rod, root neck-engine block) - 15.1 %. When measured by the V1net device, for the cylinder liner – piston friction unit-85.5 %, for the crank mechanism friction units (root neck-connecting rod, connecting rod neck-connecting rod, root necks-engine block) - 93.2 %. The proposed method for determining the state of the engine by the value that occurs in its EMF friction nodes can be used in the technical diagnostics of engines

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ZHOU, Xun. "Fatigue crack growth regular tests for engine crankshaft and analysis on the mechanism." Chinese Journal of Mechanical Engineering 44, no. 01 (2008): 238. http://dx.doi.org/10.3901/jme.2008.01.238.

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Subharaj, Chelliah, Uthirapathi Natarajan, and Xevier Hyacinth Suganthi. "Sustainable eco-design for fixture index mechanism in crankshaft speed sensor assembly line." Advances in Mechanical Engineering 11, no. 7 (July 2019): 168781401985278. http://dx.doi.org/10.1177/1687814019852785.

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The purpose of this article is to examine the relationship of sustainable manufacturing process and sustainability performance, which considers the environmental, economic, and social aspects. Sustainable manufacturing considering ecological system and corrosion properties has attracted interest in gaining deep insights into the application of daily business operations. Currently, there is an internal pressure in the firms to reduce the costs of production, increase the product quantity with quality, minimize the defects and reliability as well as facilitate faster and flexible delivery. In addition, these firms attempt to seek to satisfy end users and improve operational efficiency. Market pressure, society’s demand for environmental-friendly process, and regulatory compliance are mostly discussed as additional pressure to the green operations initiative in the automotive firms. In this article, an existing model was designed using the computer-aided design software and the results were analyzed to fill research gaps in the effects of the eco-system on environmental and operational performance. This study provides new research opportunities for developing models in building simulation-based design of eco-efficient systems. Finally, the article suggests that the operations should apply parsimony principles of ecosystem measurements to foresee the imminent organizational outcome to enlighten industry counterparts with guidance to enhance further robust statistical modeling and construct development.

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Han, Shao Jun, Chao Chen, and Xiong Li. "Study on Block Structure Optimization of Single Degree of Freedom Crankshaft Fillet Rolling Machine." Advanced Materials Research 655-657 (January 2013): 222–26. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.222.

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Made a static analysis of the SDOF rolling arm of the crankshaft rolling mechanism by using ANSYS finite element analysis software, obtained stress distribution and deformation of the rolling arm in clamping condition, then optimized the size of the rolling arm. Achieve the purpose of reducing the weight of the rolling arm,within the yield limit of the material.

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Tihonov, Еvgenii, Valentin Bazykin, Olga Gerasimova, and Sergey Soloviev. "Mathematical model of the mechanism of the "alpha" type Stirling engine for operation in the timber industry complex." E3S Web of Conferences 210 (2020): 08010. http://dx.doi.org/10.1051/e3sconf/202021008010.

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This article discusses the multi-criteria parameterization of the crank-slider group of the Stirling engine type "alpha". The dependences of the displacement of the piston and the displacer are obtained, taking into account a number of variable geometric parameters. The resulting equation of movement of the piston from displacement of the propellant is composed of a crankshaft angle, which will allow to obtain a numerical model simulation of the crank-slider group that will significantly reduce the time of numerical calculations. The dependence of the torque on the crankshaft with known pressures on the piston and the displacer is obtained. This study will eventually allow us to determine the optimal parameters of the designed steering engine, depending on the power and operating temperatures. This will allow us to design an engine for use in the timber industry (use of logging and woodworking waste as fuel). Effective use for energy generation is an urgent task of the forest complex. Currently, obtained torque equation will allow us to study the working process of the engine when solving the gas-dynamic problem of cyclic flow of gas from the cavity of the piston cylinder to the cavity of the displacer cylinder and back.

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Liu, Jun, and Jiang Zhu. "Design Research on Working Mechanism of Beam Pumping Unit." Applied Mechanics and Materials 37-38 (November 2010): 340–43. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.340.

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Based on the unique geometry and mechanical movement of beam pumping unit, this paper presented a simple swing equation and computed motorial parameter, meanwhile under the conditions of the static load and inertial load of the polished-rod of a conventional pumping unit, it also presented an equivalent dynamic model of the pumping unit system and the type-curves of net torque of the crankshaft with the characteristic of inertial counterbalance having been computed, the model can provide a theoretical base for study on the other transient working parameters of beam pumping unit. Being satisfied with motion accuracy and boundary constraints, the optimization model of beam pumping unit is established. The simulated annealing algorithm with penalty strategy is adopted to solve the optimal model, so that optimization process was simplified and the global optimal solution is ensured reliably.

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Zhao, Man, Shurong Yu, Chao Li, and Yang Yu. "Effect of Mechanism Error on Input Torque of Scroll Compressor." International Journal of Rotating Machinery 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/438127.

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Based on the fundamental principle of plane four-bar mechanism, the force on the equivalent parallel four-bar mechanism was analyzed for scroll compressor with mini-crank antirotation, and the formula of input torque was proposed. The change of input torque caused by the mechanism size error was analyzed and verified with an example. The calculation results show that the mechanism size error will cause large fluctuation in input torque at the drive rod and connecting rod collinear and the fluctuation extreme value increases with rotational speed. Decreasing of the crankshaft eccentricity errors is helpful for reducing the effects of dimension error on input torque but will increase the friction loss of orbiting and fixed scroll wrap. The influence of size error should be considered in design in order to select suitable machining accuracy and reduce the adverse effect caused by size error.

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Badoiu, Dorin. "Research Concerning the Influence of Balancing the Conventional Pumping Units on their Dynamics." Revista de Chimie 72, no. 2 (May 7, 2021): 178–85. http://dx.doi.org/10.37358/rc.21.2.8429.

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The paper analyses the influence of the rotary balancing and of the combined balancing (rotary and oscillating) on the variation of the motor torque at the crankshaft and on the variation of the connection forces acting in the joints of the mechanism of the conventional pumping units. For this purpose a computer program has been developed and a series of results in the case of a C-640D-305-120 pumping unit are presented.

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Guan, Nanxiang, Ao Wang, Yongpeng Gu, Zhifeng Xie, and Ming Zhou. "A Novel Coaxial Balance Mechanism for Reciprocating Piston Engines." Applied Sciences 11, no. 12 (June 18, 2021): 5647. http://dx.doi.org/10.3390/app11125647.

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Vibration is an important issue faced by reciprocating piston engines, and is caused by reciprocating inertia forces of the piston set. To reduce the vibration without changing the main structure and size of the original engine, we proposed a novel coaxial balance mechanism design based on a compact unit body. By introducing a second-order balance mass, this mechanism can significantly increase the efficiency of vibration reduction. The proposed mechanism can effectively balance the first-order and second-order inertia forces with the potential of balancing high-order inertia forces. To accurately determine the second-order balance mass, a closed-form method was developed. Simulation results with a single-cylinder piston DK32 engine demonstrate the effectiveness and advantage of the proposed mechanism. At a crankshaft speed of 2350 r/min, compared with the first-order balance device, the average root mean square velocity of the test points on the engine’s cylinder was reduced by 97.31%, and the support reaction force was reduced by 96.54%.

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Zhang, Xiao Ming, Yu Qing Wang, and Jie Fang. "Dynamic Simulation of Crank-Connecting Rod-Piston Mechanism of Internal Combustion Engine Based on Virtual Prototype Technology." Applied Mechanics and Materials 143-144 (December 2011): 433–36. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.433.

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A virtual prototype model of S195 diesel engine was established by using CAD, finite element analysis based on virtual prototype technology and dynamics theory of flexible multibody systems to study the kinetic discipline of the crank-rod mechanism,vibration of cylinder block caused by inertia force and the balance problem of inertia force.The rigid body and flexible body simulation were compared.The interaction force between components could be determined by flexible multibody dynamics analysis of the crankshaft system under the real working condition. The simulation results are accordant with those in true working state of S195 diesel engine. This research provides a feasible advanced method for design and development of diesel engine.

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Pasricha, M. S. Pasricha, and F. M. Hashim. "Effect of the reciprocating mass of slider-crank mechanism on torsional vibrations of diesel engine systems." ASEAN Journal on Science and Technology for Development 23, no. 1&2 (October 30, 2017): 71. http://dx.doi.org/10.29037/ajstd.94.

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The torsional vibration phenomenon in the running gear of reciprocating engine systems isusually dealt with by considering a series of constant inertias connected by sections of massless shafting. However in reality, a slider crank mechanism is a vibrating system with varying inertia because the effective inertia of the total oscillating mass of each crank assembly varies twice per revolution of the crankshaft. Large variations in inertia torques can give rise to the phenomenonof secondary resonance in torsional vibration of modern marine diesel engines which can not be explained by conventional theory incorporating only the mean values of the varying inertias. In the past associated secondary resonances and regions of instability tended to be dismissed by most engineers as interesting but of no importance. The situation changed in recent years since there is evidence of the existence of thesecondary resonance effects which could have contributed to a number of otherwise inexplicable crankshaft failures in large slow speed marine engines. The cyclic variation of the polar moment of inertia of the reciprocating parts during each revolution causes a periodic variation of frequency and corres ponding amplitude of vibration of reciprocating engine systems. It also causes an increase in the speed range over which resonance effects are experienced and only a partial explanation of the behaviour of the systems has been worked out. It is impossible to avoid these instabilities by changes in thedesign , unless of course the variations in mass and spring constant can be made zero. In the present paper a critical appraisal of the regions of instability as determined from the equation of motion which takes into account variation of inertia is given. The motion in the form of complex waveforms is studied at different speeds of engine rotation. A comparison of theoretical results with Goldsbrough’s experimental resultsand Gregory’s analysis is included.

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Guan, Xing Quan, Qiu Ping Lu, and Wei Dong Liu. "Study on the Working Principle of a New Type of Power Transmission Mechanism for Gasoline Engine." Advanced Materials Research 744 (August 2013): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.744.223.

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This paper presents a new heat-work device, which chooses the gear-rack mechanism to realize the reciprocating motion of cylinder, and that applies swing rod rotation to transmit thermal energy, it changes the use of traditional engine crank-link mechanism and improves the mechanical transmission efficiency effectively. Using incomplete gear mesh, the length of displacement can change in the exhaust stroke, so that the combustion exhaust gas can discharge more. The premix gas is completed ahead of schedule two stroke earlier than traditional gasoline engine in the auxiliary cylinder, and mixture gas burn more thoroughly. To combine swing rod with overrunning clutch install on the output straight shaft, it can replace the crankshaft for output power.

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Bartoš, Josef, and Jozef Tiňo. "A study of the mechanism of decay of alkyl macroradicals in isotactic polypropylene." Collection of Czechoslovak Chemical Communications 50, no. 6 (1985): 1391–401. http://dx.doi.org/10.1135/cccc19851391.

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The kinetic data of decay of alkyl macroradicals in two temperature regions in isotactic polypropylene exposed to gamma radiation at 77 K were interpreted in terms of the model of diffusion-limited reactions at the activation energy level. The potential molecular mechanisms of transfer of the radical centres were tested from the point of view of their physical and/or chemical migration. Two mechanisms are suggested for the mutual approach of the centres in macroradical decay regions I and II in the amorphous zones of the matrix. Both of them involve the contribution of segmental conformational motions, the mobility of the terminal segments being of importance in region I whereas in region II the mutual nearing of the reactants proceeds in a relay way via intermolecular H-abstraction in conjunction with crank and crankshaft motions of the end and inner segments of the chain.

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Groza, Doru. "Balancing of a Slider-Crank Mechanism by Using a Counter Mass and a Progressive Spring with Two Rates." Applied Mechanics and Materials 823 (January 2016): 37–42. http://dx.doi.org/10.4028/www.scientific.net/amm.823.37.

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This paper investigates the possibility to individually balance the specific shaking forces and shaking moment of the slider-crank mechanism. The most common mean of balancing the slider crank mechanism is to use a counter mass. This solution is applied for almost every slider-crank mechanism used in commercial mechanical devices. However the nature of the mechanism does not allow a perfect balancing in such a way. The different nature of motions that govern the piston displacement and crank rotation imply that a counter mass can only statically balance the mechanism. An ideal dynamic balancing cannot be achieved this way. Therefore in this paper the excitations that act on the mechanism are split by the nature of motion that generates them and balanced accordingly. Two motions are defined, respectively the motion of the piston and the motion of the crank. The inertia force associated with the crank motion is balanced by building a dynamically equivalent system around the axis of the crankshaft while the excitation associated with the motion of the piston is balanced with a progressive spring with two rates.

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Journal articles on the topic 'Crankshaft mechanism'

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