General Analysis of Minimum Film Thickness in Line Contact Elastohydrodynamic Lubrication

被引：0

作者：

Hou Y.-K. ^{[1
]}

Liu Z.-G. ^{[1
]}

Liu Z.-X. ^{[1
]}

Wang Q.-J. ^{[2
]}

Hu D.-K. ^{[1
]}

Xing B. ^{[2
]}

机构：

[1] School of Power and Energy, Northwestern Polytechnical University, Xi’an

[2] Key Laboratory of Power Transmission Technology on Aero-Engine, Aero Engine Corporation of China, Shenyang

来源：

Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 03期

关键词：

Aeroengine; Elastohydrodynamic lubrication; Film thickness; Line contact; Thermal effect;

D O I：

10.13675/j.cnki.tjjs.210824

中图分类号：

学科分类号：

摘要：

Aiming at the pitch circle position of a spur gear in an aeroengine，considering the thermal effect of elastohydrodynamic lubrication，the effects of velocity parameters（-u），load parameters（-w）and material parameters（-g）on isothermal solution and thermal solution were studied. Three empirical formulas widely used to calculate the minimum oil film thickness under isothermal conditions are compared and analyzed. It is found that the error between the isothermal solution and thermal of elastohydrodynamic lubrication calculated by the formula of Грубин and Dowson is large within the working conditions studied in this paper. Yang’s formula has a small error in isothermal solution and thermal solution under low velocity or moderate load parameters，which can be directly used to predict the minimum oil film thickness of line contact in some working conditions. All three isotherm empirical formulas overestimate the effect of load parameters. The relative error of 10% is taken as the boundary between the quantized isothermal solution and thermal solution，and the reference range of each dimensionless parameter is given. If one of the following conditions is met，the influence of thermal effects in elastohydrodynamic lubrication cannot be ignored，and the isothermal solution is no longer applicable：（1）-u>10-10；（2）-w <5×5-10 and -u >5×10-11；（3）-w >3×10-4 © 2023 Journal of Propulsion Technology. All rights reserved.

引用

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