Results 191 to 200 of about 3,112 (223)
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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 ...
Fengxia Lu +4 more
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Prediction of Oil Flow inside Tractor Transmission for Splash Type Lubrication
SAE Technical Paper Series, 2019<div class="section abstract"><div class="htmlview paragraph">This study introduces a method to examine the flow path of the lubricant inside a transmission housing of a tractor. A typical gearbox has several loads bearing elements which are in relative sliding motion to each other which causes heat to be released.
Tanmay Sushant Santra +5 more
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Journal of Tribology, 2021
Abstract Planetary gears are used in several applications given that they provide high reduction ratio in a compact size. Two kinds of lubrication are used in these applications: injection or splash lubrication. In case of splash lubrication, the authors already highlighted the importance of the centrifugal effects leading to the ...
Boni, J.B., Changenet, C., Ville, F.
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Abstract Planetary gears are used in several applications given that they provide high reduction ratio in a compact size. Two kinds of lubrication are used in these applications: injection or splash lubrication. In case of splash lubrication, the authors already highlighted the importance of the centrifugal effects leading to the ...
Boni, J.B., Changenet, C., Ville, F.
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Research on characteristics of splash lubrication and power losses of reducer based on
AbstractThe distribution of lubricant flow field inside the two‐stage transmission reducer is very complicated during splash lubrication, which is difficult to be visually simulated and analysed using traditional finite element methods (FEM). There are many problems in model processing, algorithm selection, mesh division, and computational workload ...
Huanlong Liu +3 more
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Industrial Lubrication and Tribology, 2021
Purpose This paper aims to propose a numerical method to calculate the convective heat transfer coefficient of spiral bevel gears under the condition of splash lubrication and to reveal the lubrication and temperature characteristics between the gears and the oil-air two-phase flow.
Fengxia Lu +4 more
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Purpose This paper aims to propose a numerical method to calculate the convective heat transfer coefficient of spiral bevel gears under the condition of splash lubrication and to reveal the lubrication and temperature characteristics between the gears and the oil-air two-phase flow.
Fengxia Lu +4 more
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Flow and Heat Transfer Simulation in a Splash Lubricated Bell 525 Accessory Gearbox
Proceedings of the Vertical Flight Society 73rd Annual Forum, 2017Operating temperatures in a drive system gearbox are impacted by multiple factors like mechanical power, operating environment, geometrical design and lubricant properties. Cooling and lubrication performance is critical to operation and durability.
Siddhartha Mukherjee +2 more
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Influences of an oil guide device on splash lubrication performance in a spiral bevel gearbox
Tribology International, 2019Abstract The splash-lubricated intermediate gearbox of a helicopter is employed to investigate the influence of an oil guide device on lubrication performance in spiral bevel geared transmissions. A CFD (Computational Fluid Dynamics) numerical model of the gearbox which is mainly composed of an oil guide device, spiral bevel gears and the casing wall
Yiyao Jiang +4 more
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Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
With practical physical immersion depth as their joint, the relations between the oil distribution characteristics and the associated no-load power losses for splash-lubricated orthogonal face gears are explored and quantified in this paper. Firstly, a theoretical analytical model is proposed to estimate the churning losses of an isolated face gear ...
Yu Dai +4 more
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With practical physical immersion depth as their joint, the relations between the oil distribution characteristics and the associated no-load power losses for splash-lubricated orthogonal face gears are explored and quantified in this paper. Firstly, a theoretical analytical model is proposed to estimate the churning losses of an isolated face gear ...
Yu Dai +4 more
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Oil film deposition characteristics and judgment of lubrication effect of splash lubricated gears
Journal of Mechanical Science and Technology, 2023Fengxia Lu +4 more
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Analysis and verification of splash lubrication for electric vehicle gearbox
International Journal of Heavy Vehicle Systems, 2022Zhang Qingyong +3 more
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