Results 191 to 200 of about 316 (219)
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A Novel Prediction Model for Churning Power Loss of Spur Gear
Lubrication ScienceABSTRACTThe prediction of churning power loss has been a difficult problem in the analysis of spur gears. Thus, an analytical prediction model based on the redefinition of churning power loss and energy transformation is proposed to estimate the churning power of spur gears. Churning power loss is defined as the combination of the power loss due to the
Fuchun Jia, Binyu Wang, Yao Fu
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Tribology International, 2021
Abstract To study the influence of dynamic flight attitudes on the splash lubrication performance and churning power losses of the intermediate spiral bevel gearbox in a helicopter, a three-dimensional (3D) simulation model consisting of a spiral bevel gear pair, two bearing caps with oil guide holes and the housing is established, and CFD ...
Xiaozhou Hu +3 more
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Abstract To study the influence of dynamic flight attitudes on the splash lubrication performance and churning power losses of the intermediate spiral bevel gearbox in a helicopter, a three-dimensional (3D) simulation model consisting of a spiral bevel gear pair, two bearing caps with oil guide holes and the housing is established, and CFD ...
Xiaozhou Hu +3 more
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Materials Today: Proceedings, 2020
Abstract Worm gears have very high total power losses due to high sliding motion and strong reduction ratio resulting in low efficiency. It is currently assumed that the total power loss (TPL) is caused by the load dependent losses; it is not caused by any non-load dependent losses.
Hardik G. Chothani, Kalpesh D. Maniya
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Abstract Worm gears have very high total power losses due to high sliding motion and strong reduction ratio resulting in low efficiency. It is currently assumed that the total power loss (TPL) is caused by the load dependent losses; it is not caused by any non-load dependent losses.
Hardik G. Chothani, Kalpesh D. Maniya
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Numerical Modeling of Churning Power Loss of Gear System Based on Moving Particle Method
Tribology Transactions, 2019Churning power losses are an important portion of transmission load-independent power losses, especially in high-speed condition and dip-lubricated gearboxes with high immersion depth.
Dong Guo +4 more
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Forschung im Ingenieurwesen, 2016
Energy efficiency represents one of the most relevant trends in many fields, including the sector of power transmissions and gears, which are involved whenever power has to transmitted and transformed. For instance, in the automotive industry, gearboxes can contribute to the overall efficiency of the system and promote lower fuel consumption and ...
CONCLI, FRANCO, GORLA, CARLO
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Energy efficiency represents one of the most relevant trends in many fields, including the sector of power transmissions and gears, which are involved whenever power has to transmitted and transformed. For instance, in the automotive industry, gearboxes can contribute to the overall efficiency of the system and promote lower fuel consumption and ...
CONCLI, FRANCO, GORLA, CARLO
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Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2018
Sufficient oil supply of all machine elements in gearboxes is usually required to avoid damage during operation. Quite frequently, transmissions are conservatively designed with an oversupply of oil to guarantee operational reliability. An oversupply of oil results in an unnecessarily high amount of oil being kept in motion, which in turn leads to ...
Hua Liu +6 more
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Sufficient oil supply of all machine elements in gearboxes is usually required to avoid damage during operation. Quite frequently, transmissions are conservatively designed with an oversupply of oil to guarantee operational reliability. An oversupply of oil results in an unnecessarily high amount of oil being kept in motion, which in turn leads to ...
Hua Liu +6 more
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A Numerical Analysis Method of the Churning Power Loss of a Planetary Gear System
2022 International Conference on Mechanical and Electronics Engineering (ICMEE), 2022Shenlong Li +3 more
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2017
Thanks to the recent developments in the computer science, simulations are becoming an increasingly widespread approach that can help the designers in the development of new products. In the specific field of gearboxes, simulations up to now have been used mainly for structural and dynamic analysis.
Concli, F, Gorla, C
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Thanks to the recent developments in the computer science, simulations are becoming an increasingly widespread approach that can help the designers in the development of new products. In the specific field of gearboxes, simulations up to now have been used mainly for structural and dynamic analysis.
Concli, F, Gorla, C
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Numerical study on the churning power loss of spiral bevel gears at splash lubrication system
Lubrication ScienceAbstractIn order to predict the spiral bevel gear churning power loss, based on the Computational Fluid Dynamics (CFD) method, the computational model for the splash lubrication of the spiral bevel gear pair is established and validated by experiments.
Shuai Hu, Wuqi Gong, Peng Gui
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Modeling of oil churning power loss in spiral bevel gears under oil injection lubrication
Physics of FluidsSpiral bevel gears are widely used in automobile transmission systems, and their performance plays a crucial role in driveline safety and transmission efficiency. However, studies on the lubrication performance and churning power loss of spiral bevel gears under an injection lubrication system are still insufficient.
Shuai Hu, Wuqi Gong, Xinda Ren
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