动力传输齿轮表面闪温的部分弹流热分析

采用部分热弹性流体动力润滑理论对非修缘直齿轮的表面闪温进行了研究。通过数值计算过程,分析了齿轮在一个啮合循环中,表面粗糙纹理、表面粗糙度等形貌参数及工况参数对轮齿表面和油膜内闪温的影响规律。本文的研究方法对齿轮胶合机理和提高齿轮胶合承载能力的研究都是有意义的。

THERMO-PEHL ANALYSIS FOR THE SURFACE FLASH TEMPERATURE OF POWER TRANSMISSION GEARS

A thermal-partial elastohydrodynamic lubrication theory is used to study the surface flash temperature of the quasi-steady state spur gears in this paper. By solving simultaneously average Reynolds equation, nominal film thickness equation, energy equation, asperity contact temperature equation, etc., the effects of surface topography parameters such as surface texture orientation and surface roughness and other operating condition parameters on the flash temperatures in the oil film layer and on the gear teeth surfaces in the meshing cycle are analyzed. The calculation results in current work show that the surface flash temperatures of involute gears increase with the increases of surface texture orientation value and surface roughness root-mean-square value, and that in the arc of action, the maximum temperature rise appeares at point A where the tip of a driven tooth touches the flank of a driving tooth. The research method adopted in the paper are fo some significance to the study of gear scuffing mechanism and the study to increase the gear scuffing load carry capacity.