节点外啮合齿轮胶合承载能力中平均摩擦因数的计算方法  

Calculation of mean friction coefficient in scuffing strength for gear drive with meshing beyond pitch point

作　　者：孙永正[1] 朱如鹏[1] 鲍和云[1] 

机构地区：[1]南京航空航天大学机电学院江苏省精密与微细制造技术重点实验室,南京210016

出　　处：《航空动力学报》2013年第9期2155-2160,共6页Journal of Aerospace Power

基　　金：中央高校基本科研业务费专项资金(NS2012050);江苏省高校优势学科建设工程;南京航空航天大学基本科研业务费专项科研项目(NS2012050,NP2011014)

摘　　要：分析了现有胶合承载能力计算中平均摩擦因数计算方法的不足之处,根据节点外啮合齿轮传动的啮合特点,以相关标准中渐开线圆柱齿轮的计算公式为基础,提出了一种更为合理且精度较高的平均摩擦因数计算方法,以满足节点外啮合齿轮胶合承载能力计算的需要.通过对内、外啮合副节点前啮合和节点后啮合实例的计算,得出除外啮合节点前啮合以外,利用标准计算得到的平均摩擦因数的误差都超过18.5%,而改进计算方法所得的误差都在6.5%之内,证实了这种改进的平均摩擦因数计算方法具有更高的精度,而且这一计算方法也适用于标准齿轮传动.The shortcomings in current method of mean friction coefficient calculation of scuffing strength were analyzed.Based on the meshing characteristics of gear drive with meshing beyond pitch point and the formula of involute cylindrical gear in related standard,a more reasonable and accurate calculation method of mean friction coefficient was proposed to meet the need for calculation of scuffing strength of the gear drive with meshing beyond pitch point.Through calculating the examples of external-meshing and internal-meshing gear drive with meshing behind and before pitch points,it was found that errors of mean friction coefficients are more than 18.5% except external-meshing gear drive with meshing before pitch point,when they are calculated by standard formula;all of errors are less than 6.5% when they are calculated by improved formula,which confirms that the improved calculation method of mean friction coefficient is more accurate.This calculation method is also applicable to the normal transmission of gears.

关 键 词：平均摩擦因数 节点前啮合 节点后啮合 节点外系数 胶合 

分 类 号：V232.8[航空宇航科学与技术—航空宇航推进理论与工程] TH132.413[机械工程—机械制造及自动化]