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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 +3 more
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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
Pedro M.T. Marques +3 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
Pedro M.T. Marques +3 more
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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.
M Handschuh, A Guner, A Kahraman
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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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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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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
openaire +1 more source
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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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, 2023Michael Handschuh, A Kahraman
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