内啮合斜齿轮的齿面闪温计算

CALCULATION OF FLASH TEMPERATURE ON TOOTH SURFACE OF INTERNAL HELICAL GEARS

本文计算了内啮合斜齿轮齿面各点的载荷、曲率半径和切向速度,在此基础上,分别用线接触弹流理论和Block基本公式计算了内啮合斜齿轮在工作条件下的齿面接触闪温分布,并对其胶合强度作了基本分析,为此类齿轮的胶合强度设计和校核提供了有效的计算方法。

An accurate calculating approach for flash temperature of internal helical gears is presented. Firstly, the load distribution on tooth surface is obtained by using 3-D finite element method and loaded tooth contact analysis technique. Then, the relative velocities and curvature radii of every node on the tooth surfaces for a pair of internal helical gears are determined. Under these conditions, the flash temperature on tooth is calculated by using Block's basic equation. Further, the thermal elastohydrodynamic analysis of line contact is applied to determination of the temperature distribution in oil film. This analysis is more accurate, though more tedious. The calculated results reveal the relationship between the gear parameters and flash temperature, which will help engineers in designing internal helical gears with high scuffing load capacity.