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Journal articles on the topic 'Gearbox'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Truta, Marian, Octavian Fieraru, Radu Vilau, Valentin Vinturis, and Marin Marinescu. "Static and Dynamic Analysis of a Planetary Gearbox Working Process." Advanced Materials Research 837 (November 2013): 489–94. http://dx.doi.org/10.4028/www.scientific.net/amr.837.489.

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Present paper focuses on the power circuits within planetary gearboxes, providing an original mathematical model. This model is an excellent instrument to analyze and determine the torque, angular speed, power factors, global gear ratios and efficiency distribution. The analysis itself has been developed for the second-gear, forward-motion of the gearbox. The analysis provides the mathematical model of the gearboxs way of working both in the static and dynamic modes. The method starts with issuing the equivalent graph (network structure) of the gearbox. Using this model, the gearbox is associa

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2

Gong, Jingyi, Geng Liu, Bing Yuan, Lan Liu, Long Yang, and Fukang Wu. "Coupled dynamics characteristics analysis of the marine multi-gearbox system under multi-source excitation." Advances in Mechanical Engineering 14, no. 4 (2022): 168781322210929. http://dx.doi.org/10.1177/16878132221092999.

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The marine multi-gearbox system has the characteristics of multi-source excitation and multi-gearbox coupled. The interaction among gearboxes is inevitable. To reveal the coupled mechanism, a coupled dynamic model of multi-gearbox system is proposed in this paper by the generalized finite element method and the substructure method. The dynamic model of each gearbox in the multi-gearbox system is also established. Under the same working conditions, the dynamic response of single gearbox and multi-gearbox system are obtained. The results show that the adjacent gear pairs of adjacent gearboxes ar

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3

Bligh, A. O., Noor A. Ahmed, and Y. Y. Zheng. "Design and Manufacture of a Planetary Gearbox Rig." Applied Mechanics and Materials 397-400 (September 2013): 176–88. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.176.

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Planetary gearboxes are required in many applications but have a high failure rate especially in wind turbines where rapid growth in turbine size is placing larger demands on the gearboxes. Current condition monitoring techniques are less effective at detecting faults in planetary gearboxes due to the complexity of the internal rotating components. A small scale planetary gearbox was, therefore, needed for testing on a gearbox test rig to develop a more effective method of condition monitoring. The detailed computer design and manufacture of the planetary gearbox for this purpose is detailed i

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4

Lin, Deng-Fa, Po-Hung Chen, and Mike Williams. "Measurement and Analysis of Current Signals for Gearbox Fault Recognition of Wind Turbine." Measurement Science Review 13, no. 2 (2013): 89–93. http://dx.doi.org/10.2478/msr-2013-0010.

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This paper presents a novel solution method based on measurement and analysis of current signals for gearbox fault recognition of wind turbine. A gearbox with typical oil-leakage fault is purposely made. The oil-leakage gearbox and a normal gearbox are used as experimental models to measure and analyze the current signals of generator. This work employs wavelet transform (WT), empirical mode decomposition (EMD) and fast Fourier transform (FFT) to analyze the current signals for both the oil-leakage and the normal gearboxes. K-nearest neighbors (KNN) is used on automatic fault recognition. Firs

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5

Dechen, Yao, Limin Jia, Yong Qin, and Yang Jianwei. "A Method for Railway Gearbox Faults Detection Based on Time- Frequency Feature Parameters and Genetic Algorithm Neural Network." Open Mechanical Engineering Journal 8, no. 1 (2014): 349–53. http://dx.doi.org/10.2174/1874155x01408010349.

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Early identification of faults in railway gearboxes is a challenging task in gearbox fault detection. There are extensive studies, such as patents and papers have been fully developed for processing vibration signals to obtain diagnostic information about gearbox. We have proposed a new technique for detecting faults in the railway gearbox by applying the time frequency parameters and genetic algorithm neural network to deal with railway gearbox fault signals. In this method, wavelet analysis and empirical mode decomposition (EMD) are carried out on gearbox vibration signals for extracting the

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6

Kuzhelnyi, Yaroslav, Olga Aksonova, and Dmytro Mashkovtsev. "Analysis of Design Features of Different Types of Car Gearboxes." Central Ukrainian Scientific Bulletin. Technical Sciences 1, no. 7(38) (2023): 196–204. http://dx.doi.org/10.32515/2664-262x.2023.7(38).1.196-204.

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One of the important components of the car design is the gearbox, which is part of the transmission. It is the gearbox that is responsible for changing the direction of the car and its speed. This affects traction and dynamic properties in general. The purpose of this article is to analyze the design features of various types of car gearboxes. The work analyzes the design features of various types of car gearboxes. The purpose of the gearbox, the effect on the traction-speed properties, which are a set of properties that determine the possible speed ranges and the maximum intensity of accelera

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7

Rakhit, A. K. "An Improved Epicyclic Gearbox for Reduced and Controllable Subsynchronous Vibrations in Gas Turbogenerator Applications." Journal of Engineering for Gas Turbines and Power 119, no. 3 (1997): 640–46. http://dx.doi.org/10.1115/1.2817032.

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An improvement is made to the design of an epicyclic gearbox that limits the dynamic eccentricities of gearbox components. Gearboxes were manufactured to the new design and tested, showed reduced levels of subsynchronous vibrations at the turbine bearings. The in-situ balancing feature of the gearbox is also found to be very effective in reducing these vibrations further. The improved gearboxes not only assured the service life of the turbine bearings, but also increased the success rate of package testing the first time with substantial cost savings.

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8

Yu, He, Wankai Shi, and Zhenhao Su. "Research on the Calculation Method for the Load Distribution of the Dual-Input Counter-Rotating Transmission System." Applied Sciences 14, no. 7 (2024): 2899. http://dx.doi.org/10.3390/app14072899.

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In order to solve the problem of an uneven load distribution in a double-input and double-output gearbox, based on the small-displacement Jacobi spin theory and considering the manufacturing and assembly errors of the gearbox, a Jacobi spin analysis model of the gearbox was established. In order to improve the accuracy of the three-dimensional tolerance analysis of the gearbox, on the basis of the processing method of parallel chain of gears and shafts and box and shafts, the serialization method of parallel chain of meshing gear pairs is proposed, and the gearbox was established. For the thre

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9

Miao, Qiang, and Qinghua Zhou. "Planetary Gearbox Vibration Signal Characteristics Analysis and Fault Diagnosis." Shock and Vibration 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/126489.

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Planetary gearboxes are widely used in helicopters, wind turbines, mining machinery, and so forth. The structure and motion type of a planetary gearbox are more complex in comparison with a fixed-shaft one, which makes condition monitoring and fault diagnosis of planetary gearbox a challenging issue in practical applications. In order to understand the fundamental nature of planetary gearbox vibration, this paper conducts an investigation on vibration characteristics of a single-stage planetary gearbox. Assuming that the gearbox and the sensor revolve inversely at the speed of planet carrier,

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10

Yue, Xiao Feng, and Cheng Wei Zhu. "The Application and Research of Order Analysis in Gearbox Fault Diagnosis." Applied Mechanics and Materials 635-637 (September 2014): 844–50. http://dx.doi.org/10.4028/www.scientific.net/amm.635-637.844.

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This paper researched the failure mechanism of the gearbox and resample algorithm in order analysis. For diagnosing the types of gearbox’s fault by analyzing the acquisition of vibration signal and extracting the fault characteristics of the gear. A function that relation gearbox vibration signal amplitude to order and shaft speed and transform from the time domain signal to angular domain signal was deduced. The MQ250 gearbox model was applied for the experimental analysis in this paper, the fault mechanism function of this gearbox has been successfully verified and the gearbox fault characte

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11

Sharipov, V. M., M. I. Dmitriyev, A. S. Zenin, I. A. Malanin, and I. A. Smirnov. "On the slipping of friction clutches during gear shifting without interruption of power flow in gearboxes of cars and tractors." Traktory i sel hozmashiny 82, no. 6 (2015): 5–9. http://dx.doi.org/10.17816/0321-4443-65386.

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The article considers the slipping process of friction clutches in gearboxes of cars and tractors during gear shifting without interruption of power flow. It is proved that the gear shifting process in gearbox without power flow interruption occurs when clutch friction discs of engaged gear are slipping and discs of disengaging gear are closed. At this, the value of torque transmitted by disengaging friction clutch in gearbox depends on a value of frictional moment of engaging friction clutch. The results of this article also apply to composite gearboxes such as DSG (Direct Shift Gearbox).

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12

S K, Nithin, S. K. Ramalinge Gowda, Rayappa Shrinivas Mahale, and Adarsh Patil. "A Review on Gearbox Condition Monitoring and Signal Analysis Techniques." Scientific Hypotheses 1 (April 10, 2024): 36–46. http://dx.doi.org/10.69530/15vwy749.

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The manufacturing industry propels the globe forward. Every manufacturing business has many machines and gears for power conversion, speed reduction, and torque amplification, and many of them can be controlled. It is projected that 10 million new gearboxes enter service each year, with a total component value of more than $5 billion. The reliability of gear driven machinery and gearboxes is critical to industry's economic viability. Any malfunction in the machinery can lead to a significant breakdown expense. This paper includes a review of the literature on methods for signal analysis and ge

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13

KRESELYUK, Yuri V. "Analysis of the problems of mechanical gearboxes of transport systems and their solution using a magnetic sensor." Proceedings of Petersburg Transport University 2021, no. 4 (2021): 561–70. http://dx.doi.org/10.20295/1815-588x-2021-4-561-570.

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Objective: Increasing reliability of mechanical gearboxes using a magnetic sensor, which will sig nifi cantly increase the reliability of transport mechanisms and systems in general. Methods: An analysis of incidents covered in the media was carried out. Results: Conclusions are drawn about the consequences of failure of mechanical gearboxes. To prevent emergency situations caused by a breakdown of a mechanical gearbox, it is proposed to use a magnetic sensor, which allows carrying out analysis and diagnostics of the gearbox and its components during operation. A mathematical model of a magnet

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14

Кучкаров, Владимир, Vladimir Kuchkarov, Дмитрий Демидов, and Dmitriy Demidov. "HISTORICAL REVIEW OF DESIGN DEVELOPMENT OF MOTOR CAR GEARBOXES." Bulletin of Bryansk state technical university 2017, no. 1 (2017): 125–32. http://dx.doi.org/10.12737/24903.

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The paper reports the review in the development of motor car gearbox design. The main task consists in the detection of the reasons for changes in gearbox design for the definition of the field for gearbox substantiated application in motor car design. In the main part the advantages and shortcomings of manual, automated, infinitely variable and automatic gearboxes are under consideration. There are shown and analyzed functional diagrams of gearbox designs considered. In the conclusion it is pointed out that the most promising design of a gearbox is a robot gearbox with two clutche

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15

Lee, Geun-Ho, Young-Jun Park, Ju-Seok Nam, Joo-Young Oh, and Jeong-Gil Kim. "Design of a Mechanical Power Circulation Test Rig for a Wind Turbine Gearbox." Applied Sciences 10, no. 9 (2020): 3240. http://dx.doi.org/10.3390/app10093240.

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We developed a mechanical power circulation test rig for a wind turbine gearbox with a power rating of 5.8 MW or less. The test rig consists of an electric motor, two auxiliary gearboxes, a torque-applying device, lubrication systems, cooling systems, and control systems. The torque generating device consists of a planetary gearbox and a hydraulic control system and is used to apply the desired torque to the test gearbox. The hydraulic control system applies the torque on the ring gear of the planetary gearbox. The gears and bearings of the two auxiliary gearboxes and planetary gearboxes met t

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16

Anh, Le Hoang, Nguyen Hong Linh, Nguyen Huu Quang, et al. "Cost optimization of two-stage helical gearboxes with second stage double gear-sets." EUREKA: Physics and Engineering, no. 6 (November 18, 2021): 89–101. http://dx.doi.org/10.21303/2461-4262.2021.001855.

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In practice, the cost of a gearbox plays a very important role in the trade. Therefore, reducing the cost of gearboxes is an important task not only when manufacturing the gearboxes but also when designing them. In order to reduce the cost of a gearbox, there are many solutions in which determining the optimal partial gear ratios of a gearbox is an effective measure. This is because it not only the size, the mass but also the cost of a gearbox depends greatly on the partial gear ratios. This work presents a method for calculating the cost function of two-stage helical gearboxes with second-sta

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17

Anh, Le Hoang, Nguyen Hong Linh, Nguyen Huu Quang, et al. "Cost optimization of two-stage helical gearboxes with second stage double gear-sets." EUREKA: Physics and Engineering, no. 6 (November 18, 2021): 89–101. https://doi.org/10.21303/2461-4262.2021.001855.

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In practice, the cost of a gearbox plays a very important role in the trade. Therefore, reducing the cost of gearboxes is an important task not only when manufacturing the gearboxes but also when designing them. In order to reduce the cost of a gearbox, there are many solutions in which determining the optimal partial gear ratios of a gearbox is an effective measure. This is because it not only the size, the mass but also the cost of a gearbox depends greatly on the partial gear ratios. This work presents a method for calculating the cost function of two-stage helical gearboxes with second-sta

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18

Su, Hongsheng, Dantong Wang, and Xuping Duan. "Condition Maintenance Decision of Wind Turbine Gearbox Based on Stochastic Differential Equation." Energies 13, no. 17 (2020): 4480. http://dx.doi.org/10.3390/en13174480.

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Maintenance decision analysis is necessary to ensure the safe and stable operation of wind turbine equipment. To address gearboxes with a high failure rate in wind turbines, this paper establishes a new stochastic differential equation model of gearbox state transition to maximize the utilization of gearboxes. This model divides the state of the gearbox into two parts: internal degradation and external random interference. Weibull distribution and polynomial approximation were used to construct the internal degradation model of the gearbox. The external random interference is simulated by Brow

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19

Li, Zhang, Xing Dong Wang, Chang Yi Hu, Chi Zhong Chen, and Li Ming. "Vibration Test and Fault Diagnosis for Main Hoist Gearbox of Heavy Casting Crane." Applied Mechanics and Materials 532 (February 2014): 374–77. http://dx.doi.org/10.4028/www.scientific.net/amm.532.374.

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In view of the structure and running characteristics of gearbox of large and special crane, we have respectively carried out vibration test of fault and free-fault gearbox containing planetary gear in the work. With the help of Matlab engineering software, we can read and process the collected vibration signal of gearbox and draw the time-domain and frequency-domain graph. Through the comparative analysis of vibration information of gearboxes, we can determine the link between fault type and signal characteristic value, effectively realize the fault diagnosis of gearbox.

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20

Ji, Tian, Changwen Tao, and Tao Sun. "Lubrication optimization of high-speed train drive gearbox." Vibroengineering Procedia 56 (October 18, 2024): 196–201. http://dx.doi.org/10.21595/vp.2024.24347.

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The gears in the high-speed heavy-duty gearbox of the high-speed train are typical high-speed heavy-duty gears. Combined with the transmission principle and structural characteristics of the high-speed train drive gearbox, to ensure adequate lubrication of meshing gears and bearings, an optimization of the lubricating oil flow inside the gearbox was conducted. The oil and gas two-phase flow model inside the gearbox adopts the VOF model, and the turbulence model adopts the standard κ-ε model. Fluent is used for simulation calculation. The results show that the exhaust port position of the gearb

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21

Jammu, V. B., K. Danai, and D. G. Lewicki. "Structure-Based Connectionist Network for Fault Diagnosis of Helicopter Gearboxes." Journal of Mechanical Design 120, no. 1 (1998): 100–105. http://dx.doi.org/10.1115/1.2826659.

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A new method of diagnosis is introduced for helicopter gearboxes that relies on the knowledge of the gearbox “structure” and characteristics of the “features” of vibration for component fault isolation. Both the structural knowledge and featural knowledge in this method are defined as the fuzzy weights of a connectionist network that maps each sampled set of vibration features, obtained from a signal analyzer, into fault possibility values associated with individual gearbox components. The structural weights in this network are defined to represent the influence of gearbox component faults on

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22

Yang, Wen Zhi, Ju Feng Cao, and Wei Zhang. "Study on Dynamic Simulation of Wind Turbine Gearbox Based on Pro/E and ADAMS." Applied Mechanics and Materials 644-650 (September 2014): 442–45. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.442.

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Domestic wind turbines with 1.5MW gearbox as the research object, application of virtual prototyping technology (ADAMS) simulation of dynamics of wind turbine gearbox when braking .According to research gear box structure, size and other parameters, using Pro / E software to create a solid model of wind turbine gearboxes. After importing to the ADAMS software, add the necessary constraints and loads, virtual prototype model of the gearbox is established. The simulation of dynamics of wind turbine gearbox are carried out by using ADAMS, and the angular velocity of the in-out shaft, gear meshing

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23

Wang, Fei Fei, Xiao Qing Xiao, and Hong Shan Zhao. "Wind Turbine Gearbox Failure Prediction Based on Time Series Analysis and Statistical Process Control." Advanced Materials Research 347-353 (October 2011): 2236–40. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.2236.

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The Time Series method and Statistical Process Control strategy is applied to predict failures of wind turbine gearboxes. First, based on the real-time temperature data of gearboxes measured by temperature sensors, the temperature prediction model under normal operating conditions is established by ARIMA model. The analysis of the predicted values and the actual values of gearbox temperature is done, and proves that its residuals are normally distributed; then combined with statistical process control (SPC) methods, the big number of temperature data is used to calculate the standard deviation

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24

Timofeev, Andrei, Aleksandr Tarasov, and Yurii Novoselov. "Development of the manipulator hinge based on the original planetary differential gearbox." Robotics and Technical Cybernetics 12, no. 2 (2024): 139–45. http://dx.doi.org/10.31776/rtcj.12208.

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For manipulation in small spaces, a compact hinge based on an original planetary differential gearbox is pro-posed. The kinematic diagram of the gearbox is described, the methodology for choosing its optimal parameters is outlined, and compared with wave and traditional planetary gearboxes from leading companies. A joint design is presented, including a planetary differential gearbox, motor, an angle sensor and slip rings. A manipulator built on the basis of the proposed hinges is described.

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25

Zhang, Yangyang, Yunxian Jia, Weiyi Wu, Zhonghua Cheng, Xiaobo Su, and Aqiang Lin. "A Diagnosis Method for the Compound Fault of Gearboxes Based on Multi-Feature and BP-AdaBoost." Symmetry 12, no. 3 (2020): 461. http://dx.doi.org/10.3390/sym12030461.

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Gearbox is an important structure of rotating machinery, and the accurate fault diagnosis of gearboxes is of great significance for ensuring efficient and safe operation of rotating machinery. Aiming at the problem that there is little common compound fault data of gearboxes, and there is a lack of an effective diagnosis method, a gearbox fault simulation experiment platform is set up, and a diagnosis method for the compound fault of gearboxes based on multi-feature and BP-AdaBoost is proposed. Firstly, the vibration signals of six typical states of gearbox are obtained, and the original signa

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26

Klausen, Andreas, Johannes Kalaoja, Surya Teja Kandukuri, and Kjell G. Robbersmyr. "Sensitivity Analysis of Online Oil Quality Monitoring for Early Detection of Water Ingress in Marine Propulsion Systems." PHM Society European Conference 5, no. 1 (2020): 10. http://dx.doi.org/10.36001/phme.2020.v5i1.1268.

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   Gearboxes are critical equipment in the vessel propulsion system. Lubrication contamination caused by water ingress or condensation is one of the major failure modes in marine gearboxes leading to accelerated aging of lubricant, resulting in accelerated wear of gearbox components such as bearing and gears. This article presents a systematic evaluation of moisture ingress sensitivity of three commercial online oil quality monitoring sensors. A laboratory setup consisting of an industrial multi-stage planetary gearbox is utilised for the experimental studies. Furthermore, th

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27

Zhong, Xian You, Liang Cai Zeng, Chun Hua Zhao, Jin Zhang, and Shi Qing Wan. "Research of Condition Monitoring and Fault Diagnosis Techniques for Wind Turbine Gearbox." Applied Mechanics and Materials 197 (September 2012): 206–10. http://dx.doi.org/10.4028/www.scientific.net/amm.197.206.

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Wind power industry enormously expanded during the last several years. However, wind turbines are subjected to different sorts of failures, which lead to the increasement of the cost. The wind turbine gearbox is the most critical component in terms of high failure rates and long time to repair. This paper described common failures and root causes of wind turbine gearboxes. Then it focused on fault diagnosis and monitoring techniques for the wind turbine gearbox. The challenges and future research directions were presented, and the simulator rig of wind turbine gearbox was designed to develop c

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28

Achtenová, Gabriela, and Jiří Pakosta. "Advanced Usage of Inertia Test Stand – Measurement of the Gearbox No-Load Losses." Journal of Middle European Construction and Design of Cars 12, no. 3 (2014): 16–20. http://dx.doi.org/10.2478/mecdc-2014-0011.

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Abstract In the laboratories of Czech Technical University in Prague a new inertia test stand was designed and realised. Its main purpose is to test the behavior and endurance of the internal shift mechanisms of passenger car gearboxes. In this paper we present further usage of the test stand, which consists of measurement of gearbox losses. The gearbox on the inertia test stand cannot be loaded; therefore the target is the measurement of losses resulting mainly from splash lubrication and some additional gearbox friction (e.g. friction in shaft sealing, bearing losses). The most typical passe

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29

Safina, G., and Yu Konyaev. "Application of Maple Mathematical Package to Search for Transfer Gear Oscillation Frequencies." Bulletin of Science and Practice 10, no. 5 (2024): 35–39. http://dx.doi.org/10.33619/2414-2948/102/04.

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Considers direct spectral problem of determination of frequencies of free torsional oscillations of transfer gearbox, component part of power plants with diesel fuel, gearboxes. The gearbox is modeled by a dynamic mechanical system with three degrees of freedom of bearings and gear. The frequency equation of the direct problem was found, according to which numerical calculations were carried out to search for the frequencies of torsional vibrations of the transfer gearbox. To the conclusion of the equation and the search for the frequencies of the gearbox oscillations, a software implementatio

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30

Polivaev, Oleg I. "Development and research of the efficiency of a tractor transmission with a disc type gearbox." Tractors and Agricultural Machinery 89, no. 4 (2023): 293–98. http://dx.doi.org/10.17816/0321-4443-106273.

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BACKGROUND: Modern tractors are equipped with gearboxes that are divided into three ranges, such as slow, operating and transport, for the sake of better power usage and fuel efficiency of the engine as well as getting higher performance. In addition, gearboxes must have a large number of gears, that leads to an increase in their mass and dimensions. An increasing mass of gearbox leads to additional high-quality metal consumption as well as energy costs for self-propelling of a tractor, which reduces its operational capabilities. AIMS: Increasing the number of gears and reducing the weig

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Gurko, Alexander, and Mykola Mykhalevych. "OPTIMAL CONTROL OF AN ACTUATOR OF A ROBOTIC GEARBOX." Bulletin of Kharkov National Automobile and Highway University 1, no. 92 (2021): 72. http://dx.doi.org/10.30977/bul.2219-5548.2021.92.1.72.

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Problem. Despite the vigorous development of electric vehicles, the task of facilitating the driver to handle with elements of mechanical transmission remains relevant. For this purpose, the automation of mechanical transmission units is performed. For instance, so-called robotic gearboxes are widespread. The principle of operation of such gearboxes is similar to mechanical ones, but special separate actuators carry out the selection and shifting into the desired gear. The design of a robotic gearbox was proposed at the Automobile Department of Kharkiv National Automobile and Highway Universit

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Yudistira, Muhammad Dwi Andika, and A’rasy Fahruddin. "GearBox Wear Analysis on Milling Machine." Procedia of Engineering and Life Science 7 (March 19, 2024): 651–57. http://dx.doi.org/10.21070/pels.v7i0.1535.

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PT. Sinergi Gula Nusantara PG. Kremboong is a company engaged in sugar cane processing. To meet production targets, the machine must work for a full day and always be in good condition. Continuous use of the machine, considering the age of the machine, can cause the machine to wear out and cause a lot of trouble. The gearbox is an important component in transmitting power from the motor. Combustion motorbikes and electric motorbikes have very different characteristics. Electric motorbikes have superior torque even at low rpm. Therefore, the use of a gearbox to stabilize the torque of an electr

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33

Zheng, Zhan Qiang, Wan Kai Shi, and Kai You Liu. "Operational Modal Test for Wind Turbine Gearbox." Applied Mechanics and Materials 86 (August 2011): 483–86. http://dx.doi.org/10.4028/www.scientific.net/amm.86.483.

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Wind turbine gearbox is a key component of wind power system and it is prone to failure because of complex working environment, so the vibration and noise problems of it can not be ignored. The modal parameters of gearbox can be got by experiment method, which is a necessary condition to improve the structure of gearbox and make dynamic analysis and design to it. Modal testing has been used to gearbox by operational modal analysis which is in several actual working conditions and the modal parameters in corresponding working conditions is obtained by stochastic subspace identification. Meanwhi

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Sundukov, A. E., and E. V. Shakhmatov. "Modelling width of the spectral component of a gas-turbine engine gearbox output shaft speed." VESTNIK of Samara University. Aerospace and Mechanical Engineering 23, no. 2 (2024): 157–66. http://dx.doi.org/10.18287/2541-7533-2024-23-2-157-166.

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Gearbox is the most stressed component in an aircraft gas-turbine engine. This implies the need for finding ways to monitor its technical condition. Practice shows that the most efficient method is vibration-based diagnostics. However, this method requires the use of sophisticated measurement systems and highly skilled personnel. This paper shows that errors of gear coupling manufacture and assembly, characteristics of machine operating mode, design factors, frequency modulation of the carrier of the engine rotor speed in the stationary mode of its operation, and wear of teeth flanks determine

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Sreenatha, M., and P. B. Mallikarjuna. "A Fault Diagnosis Technique for Wind Turbine Gearbox: An Approach using Optimized BLSTM Neural Network with Undercomplete Autoencoder." Engineering, Technology & Applied Science Research 13, no. 1 (2023): 10170–74. http://dx.doi.org/10.48084/etasr.5595.

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The gearbox is one of the critical components of a wind turbine. Proactive maintenance of wind turbine gearboxes is crucial to decrease maintenance and operational costs and the long downtime of the complete system. As the gearbox is a significant part of the wind turbine, a fault in the gearbox leads to the breakdown of the wind turbine system. Hence, it is important to study and analyze the faults in wind turbine gearbox systems. In this article, a neural network-based model, a Bidirectional Long Short-Term Memory (BLSTM) fused with an autoencoder is intended to categorize the condition of t

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Zamponi, Laurent, Emmanuel Mermoz, and Jean Marc Linares. "Study of Bearing Modelling in the Helicopter Gearbox." Applied Mechanics and Materials 86 (August 2011): 721–24. http://dx.doi.org/10.4028/www.scientific.net/amm.86.721.

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In trying to incessantly reduce gearboxes weight, designers can negatively impact the service reliability, particularly in the aeronautic industry, where a weight reduction is often linked with stiffness decrease. Looking for weight savings, gearbox casings are classically made of magnesium or aluminium alloy. In addition, helicopter gearbox design is included the integration of several functions within the same part (like the shafts which gather one or more gears, splines and integrated bearings raceways). These particularities in the design are requiring some specific methodologies for Power

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Maláková, Silvia, Samuel Sivák, and Jozef Krajňák. "GEARBOX LUBRICATION SYSTEM OPTIMIZATION." Acta Mechatronica 6, no. 2 (2021): 21–24. http://dx.doi.org/10.22306/am.v6i2.75.

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The aim of gearbox lubrication is to reduce wear on the sides of the teeth, increase of the efficiency by reducing friction as well as dissipating the heat generated by friction. Lubrication of gearboxes is a discontinuous process, that means, during the meshing every meshed pair of teeth needs to have a new lubrication film created on the surfaces. The geometric shape of the sides of the teeth is conditioned by rolling and sliding movement, therefore gears often work under a mixed friction condition. This is confirmed by damage to gearboxes and by measured power losses. This contribution is d

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Ning, Feng Lian. "Load-Excursion Failure Analysis of the Gearbox’s Input Pinion." Applied Mechanics and Materials 86 (August 2011): 196–200. http://dx.doi.org/10.4028/www.scientific.net/amm.86.196.

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In this paper, the failure of gearbox’s input pinion was introduced. According to gearbox structure, the factor of load-excursion was analyzed and a method of correcting gear’s helix angle was proposed. Finally, the problem was solved by correcting the gear’s helix angle and thinking about the influence of the bushes matting under heat conditions. The calculation method of correcting gear helix angle was proven to be valid by other gearbox tests, and provided a reference for correcting the gear’s helix angle of other gearbox’s.

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Bondarenko, Oleksiy, Oleksandr Ustynenko, Roman Protasov, and Sergij Andrienko. "CRITERIA AND OBJECTIVE FUNCTIONS IN THE RATIONAL DESIGN OF TWO-SHAFT GEARBOXES." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 2 (December 28, 2024): 14–21. https://doi.org/10.20998/2079-0775.2024.2.02.

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The relevance of the scientific and practical task of forming criteria and objective functions in the rational design of two-shaft gearboxes is described. This has made it possible to understand the need to highlight the topic and conduct relevant research and scientific discussions on the issue. The most significant mass and dimensional characteristics of two-shaft gearboxes from the perspective of vehicle design have been identified and used as criteria for optimal and rational design. Specifically: the center distance, which determines the placement of the gearbox shafts and its height; the

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Zheng, Huai Liang, Ri Xin Wang, and Min Qiang Xu. "Study on the Variable Weight Method for Gearbox Fuzzy State Evaluation." Applied Mechanics and Materials 651-653 (September 2014): 885–90. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.885.

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Based on the gearbox as the research object, we discussed the problem: how to confirm every part’s weight when assess gearbox’s state by fuzzy comprehensive evaluation method. Contraposing the main problem of the weight-fixed Analytic Hierarchy Process (AHP) that ignoring every part’s fault degree in the process of evaluation, a variable weight method is proposed base on the rate of fault degree contribution. And to a state known gearbox, the weight of each part in the whole gearbox assessment is confirmed by the AHP and the variable weight method respectively. The comparison of the two assess

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Tang, Qiancheng, and Yang Tang. "VR/AR-based Wind Turbine Gearbox Maintenance Training System." Academic Journal of Science and Technology 13, no. 1 (2024): 61–67. http://dx.doi.org/10.54097/szcxr417.

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In view of the remote geographical location of wind farms, complex environmental conditions, especially the complex structure of gearboxes in wind turbines, which leads to the difficulty of equipment maintenance and troubleshooting, combined with the rapidly developing virtual reality technology (VR) and augmented reality technology (AR), a VR/AR wind power gearbox maintenance training system is designed to solve the above problems. The system includes a maintenance training system for gearbox maintenance, disassembly and assembly learning, exercises, working principle display, detailed data q

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Shen, Gang, Dong Xiang, Peng Mou, Jing Min Jiang, and Lang Gao. "Analysis of Vibration Characteristics for Wind Turbine Gearbox." Applied Mechanics and Materials 496-500 (January 2014): 962–68. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.962.

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Wind turbine is the high-end and important equipment, of which the reliability and stability is always one of the main problems. Because the gearbox is running under the condition of dynamic load caused by random wind speed, it has important significance for improving reliability of the transmission system to research dynamic behaviors of wind turbine gearbox, especially the vibration characteristics. First of all, time-varying stiffness of the meshing gear-pair is calculated in this article. Then the dynamic model of parallel gears is established and the corresponding vibration characteristic

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Wang, Chun Chieh, Yuan Kang, and Tse Yi Tu. "The Performance Analysis and Prognosis Techniques of Gearbox." Applied Mechanics and Materials 319 (May 2013): 393–98. http://dx.doi.org/10.4028/www.scientific.net/amm.319.393.

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Under the situation of increasingly stringent requirements for production speed and quality, gearboxes in many manufacturing equipment production lines lose final processing quality after long-term severe service.Machine fault prognosis is for experts or on-site maintenance personnel to use measurement equipment to capture signals and conduct diagnosis and maintenance based on personal experience. As technologies are advancing rapidly and equipment is evolving with increasing level of scale, automation and complexity, traditional diagnostic methods are no longer applicable. The article aims at

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Bhattacharjee, Debraj, Prabha Bhola, and Pranab K. Dan. "A heuristic synthesis of multistage planetary gearbox layout for automotive transmission." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 2 (2018): 336–47. http://dx.doi.org/10.1177/1464419318759893.

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The automatic transmission system is very crucial for the high-speed vehicles, where the planetary or epicyclic gearbox is a standard feature. With the increase in design intricacies of planetary gearbox, mathematical modelling has become complex in nature and therefore there is a need for modelling of multistage planetary gearbox including the shifting scheme. A random search-based synthesis of three degrees of freedom (DOF) high-speed planetary gearbox has been presented in this paper, which derives an efficient gear shifting mechanism through designing the transmission schematic of eight sp

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Siddiqui, Muhammad Omer, Ashish Chodvadiya, and Jingjing Luo. "The influence of journal bearings on the gearbox dynamics of a 5 MW wind turbine drivetrain." Journal of Physics: Conference Series 2626, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1742-6596/2626/1/012009.

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Abstract In recent years, journal bearings have been replacing roller bearings in wind turbine gearboxes, as they are believed to provide higher reliability compared with roller bearings. However, replacing roller bearings with journal bearings can drastically change the gearbox dynamics. Journal bearings have complex dynamics at different operating speeds, and, as a wind turbine operates at various speeds, it is vital to analyze the gearbox dynamics for the entire speed range. This contribution presents the dynamic response of a wind turbine gearbox when the roller bearings of the high-speed

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Gui, Xiangyu, and Xiaojing Fu. "Optimization of Heat Dissipation and Control Scheme for Wind Turbine Gearbox Based on FloMaster-Simulink co-Simulation." Journal of Physics: Conference Series 2584, no. 1 (2023): 012049. http://dx.doi.org/10.1088/1742-6596/2584/1/012049.

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Abstract Due to favorable wind conditions and steadily rising temperatures, the demand for heat dissipation for the gearbox of wind turbines rises every spring and summer, and the energy consumption of the heat dissipation system rises as well. In cases where the gearbox oil temperature is excessively high due to poor heat dissipation, the wind turbine unit may only operate at a limited load or shut down. This article suggests a restoration strategy that uses seawater to cool the gearbox lubrication system, based on the operation of the gearbox cooling system of wind turbines. The original win

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Hrdlička, Filip. "3D printed planetary gearbox for robotic arm joints." Design of Machines and Structures 12, no. 1 (2022): 38–46. http://dx.doi.org/10.32972/dms.2022.004.

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3D printing technology has become very popular in last several years as a cheap way how to make different parts. 3D printing is as a perfect tool for prototyping of various, mostly difficult, structures which is the reason why it is more and more use in mechanical design. This article is focused on assessment if 3D printing technology can be used for creating light, durable and cheap variation of classic metal or moulded plastic gearboxes for electric motors which can be used for low cost robotic arms. For this purpose was in CAD software designed a small two-stage planetary gearbox with ident

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He, Jun, Shixi Yang, Evangelos Papatheou, Xin Xiong, Haibo Wan, and Xiwen Gu. "Investigation of a multi-sensor data fusion technique for the fault diagnosis of gearboxes." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 13 (2019): 4764–75. http://dx.doi.org/10.1177/0954406219834048.

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Gearbox is the key functional unit in a mechanical transmission system. As its operating condition being complex and the interference transmitting from diverse paths, the vibration signals collected from an individual sensor may not provide a fully accurate description on the health condition of a gearbox. For this reason, a new method for fault diagnosis of gearboxes based on multi-sensor data fusion is presented in this paper. There are three main steps in this method. First, prior to feature extraction, two signal processing methods, i.e. the energy operator and time synchronous averaging,

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Hildebrand, Lucas, Florian Dangl, Constantin Paschold, Thomas Lohner, and Karsten Stahl. "CFD Analysis on the Heat Dissipation of a Dry-Lubricated Gear Stage." Applied Sciences 12, no. 20 (2022): 10386. http://dx.doi.org/10.3390/app122010386.

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Power losses in gearboxes result in frictional heating. Sufficient heat transfer from the gearbox to the environment is required for reliable operation. The heat dissipation from gears is linked to their interaction with fluids in the gearbox. Recent research has demonstrated the use of Computational Fluid Dynamics (CFD) to predict the gearbox fluid flow and no-load losses in an isothermal manner. This study focuses on a numerical analysis of the heat dissipation within a dry-lubricated gearbox under atmospheric conditions. Spur gears and helical gears are investigated. The air flow in the gea

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Czaban, Jaroslaw, and Dariusz Szpica. "The Diagnostic System of A – 604 Automatic Transmission." Acta Mechanica et Automatica 8, no. 3 (2014): 151–55. http://dx.doi.org/10.2478/ama-2014-0027.

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Abstract Automatic gearbox gains increasing popularity in Europe. Little interest in diagnosis of such type of transmission in Poland results from the fact of small share in the whole market of operated cars, so there is a lack of availability of special diagnostic devices. These factors cause issues of expensive repairs, often involving a replacement of subassembly to new or aftermarket one. To a small extent some prophylactic diagnostic tests are conducted, which can eliminate future gearbox system failures. In the paper, the proposition of diagnostic system of popular A - 604 gearbox was pr

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