Results 21 to 30 of about 23,962 (275)

Research on the Power Loss of High-Speed and High-Load Ball Bearing for Cryogenic Turbopump

Machines, 2022
This paper studies the lubrication characteristics of ball bearings for cryogenic turbopumps. First, the frictional coefficients between 440C and a Ag coating, 440C and solid PTFE (polytetrafluoroethylene), and 440C and a PTFE coating in LN2 (liquid ...
Wenhu Zhang, Chaojie Zhang, Xusheng Miao, Liang Li, Sier Deng   +4 more
doaj   +1 more source

Experimental Investigations About the Power Loss Transition Between Churning and Windage for Spur Gears

Journal of Tribology, 2020
Abstract Oil sump lubrication is commonly used in gearboxes. When considering consistent speeds, oil immersion is usually set to low level in order to reduce associated power losses. This configuration is already used in some parts of helicopter mechanical transmissions, and it is under consideration as a lubrication solution for future ...
Quiban, Romain, Changenet, Christophe, Marchesse, Yann, Ville, Fabrice   +3 more
openaire   +1 more source

Computational and experimental analysis of the churning power losses in an industrial planetary speed reducer [PDF]

WIT Transactions on Engineering Sciences, 2012
Advantages of planetary speed reducers are well known and due to their compact design and power density they are suitable for a wide range of applications. Efficiency is becoming more and more of a main concern in the design of power transmissions and the demand for high efficiency gearboxes is continuously increasing.
CONCLI, FRANCO, GORLA, CARLO
openaire   +2 more sources

Research on Splash Lubrication Characteristics of the Planetary Gear Train Based on the MPS Method

Jixie chuandong, 2023
In order to analyze the lubrication characteristics of the planetary gear transmission of shield main drive reducers, a simulation model of splash lubrication of the single-stage planetary gear train is established using the moving particle semi-implicit
Shi Lubing, Chen Huixiao, Yan Shidang, Wang Jun, Ding Haohao, Pei Bang, Liu Zhongming, Wang Wenjian   +7 more
doaj  

Numerical Simulation of the Churning Power Losses in the Automotive Hypoid Gear Reducer

Journal of Applied Mathematics and Physics, 2018
Improving vehicle transmission efficiency and reducing vehicle fuel consumption is currently one of the main objectives in the automotive field. Reducing gear churning power losses has significant influence on the decreasing vehicle fuel consumption. Based on the two phase flow theory, a 2D two-phase model of the simplified hypoid gear is established ...
Lin Zou, Mingya Du, Bing Jia, Jinli Xu, Liangshun Ren   +4 more
openaire   +2 more sources

Power Losses of Oil-Bath-Lubricated Ball Bearings—A Focus on Churning Losses

Lubricants
This study investigates the power losses of rolling element bearings (REBs) lubricated using an oil bath. Experimental tests conducted on two different deep-groove ball bearings (DGBBs) provide valuable insights into the behaviour of DGBBs under different oil levels, generating essential data for developing accurate models of power losses. Observations
Florian de Cadier de Veauce, Yann Marchesse, Thomas Touret, Christophe Changenet, Fabrice Ville, Luc Amar, Charlotte Fossier   +6 more
openaire   +2 more sources

Optimization of Churning Resistance of Hypoid Gear for Automobile Rear Axle

Jixie chuandong, 2021
The purpose of is to discuss an accessible approach to reduce the churning resistance of hypoid gear of automobile rear axle. A CFD model of automobile rear axle is conducted based on VOF and standard k-ε model， the churning power loss mechanism of rear ...
Yunxiao Shen, Jinli Xu, Jiwei Zhu, Wenchao Yang   +3 more
doaj  

Power loss analysis in altered tooth-sum spur gearing

MATEC Web of Conferences, 2018
The main cause of power loss or dissipation of heat in case of meshed gears is due to friction existing between gear tooth mesh and is a major concern in low rotational speed gears, whereas in case of high operating speed the power loss taking place due ...
Sachidananda H. K., Raghunandana K., Shivamurthy B.   +2 more
doaj   +2 more sources

A Study on the Lubrication Characteristics and Parameter Influence of a High-Speed Train Herringbone Gearbox

Lubricants
To investigate the lubrication characteristics in high-speed train gearboxes, a two-stage herringbone gearbox with an idle gear was analyzed. The lubricant flow and distribution were shown using the moving particle semi-implicit (MPS) method.
Shuai Shao, Kailin Zhang, Yuan Yao, Yi Liu, Jieren Yang, Zhuangzhuang Xin, Kuangzhou He   +6 more
doaj   +1 more source

Lubrication mechanism in gearbox of high-speed railway trains

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2020
In this study, the moving particle semi-implicit (MPS) method is employed for numerical simulation of flow field in gearbox of high-speed railway trains so as to understand the lubrication mechanism and mode in the gearbox during high-speed operation.
Xingqiao DENG, Shisong WANG, Shike WANG, Jie WANG, Yucheng LIU, Yangqing DOU, Ge HE, Linmao QIAN   +7 more
doaj   +1 more source