Results 201 to 210 of about 629 (229)
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Determination of oil distribution and churning power loss of gearboxes by finite volume CFD method
Tribology International, 2017Abstract Sufficient oil supply of all machine elements in gearboxes is usually required to avoid damage and to reduce friction during operation. However, dip lubrication and injection lubrication always result in hydraulic gear power losses. Especially in high-speed and dip-lubricated gearboxes with high oil levels, churning losses can represent a ...
Hua Liu, Karsten Stahl, Thomas Lohner
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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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Tribology International, 2013
Abstract In this study gear oils were tested for power loss behaviour in a two stage multiplying gearbox, on a back-to-back test rig with recirculating power. The tests were performed at low input speeds and high input torques with oil sump temperature set free. A power loss model simulating the power loss mechanisms was implemented to evaluate gear
R Martins +2 more
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Abstract In this study gear oils were tested for power loss behaviour in a two stage multiplying gearbox, on a back-to-back test rig with recirculating power. The tests were performed at low input speeds and high input torques with oil sump temperature set free. A power loss model simulating the power loss mechanisms was implemented to evaluate gear
R Martins +2 more
exaly +2 more sources
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
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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), 2022Chaobo Chen, Shenlong Li
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An experimental investigation of windage and oil churning power losses of gears and discs
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2022This study presents comparable sets of churning and windage power loss measurements of a gear. Measurements are performed under windage (air only) and churning (immersion in oil up to a certain level) to quantify load-independent power losses of a family of spur and helical gears along with representative discs. Aiming at quantifying the impact of gear
M Handschuh, A Guner, A Kahraman
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Churning power loss of the intermediate gearbox in a helicopter under splash lubrication
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2021Based on computational fluid dynamics, a two-phase flow model was established to calculate the churning power loss of the spiral bevel gears under splash lubrication. The error between the simulation results and experiment results is only 7.04%. Taking a certain helicopter as an example, the churning power loss of the intermediate gearbox is ∼2.6051 kW,
Fengxia Lu +4 more
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Oil Churning Power Losses of a Gear Pair: Experiments and Model Validation
Journal of Tribology, 2009This paper presents the results of an experimental study on load-independent (spin) power losses of spur gear pairs operating under dip-lubricated conditions. The experiments were performed over a wide range of operating speed, temperature, oil levels, and key gear design parameters to quantify their influence on spin power losses.
S. Seetharaman +3 more
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