计算3K行星轮系效率的简便方法

A handy way for calculating the efficiency of 3K planetary trian

本文给出计算３Ｋ行星轮系啮合效率的简便方法：先将３Ｋ行星轮系的效率写成两个２Ｋ—Ｈ行星轮系效率的乘积形式，再将其中出现的，不含最大中心轮的转化机构效率代号稍做改换，即可得出３Ｋ行星轮系效率的表达式。

his paper gives out a handy way for calculation the engaging efficiency of 3K planetary train. At first the efficiency of 3K planetary train is written as the form of product of two efficiency formulas for 2K-H planetary train,and then change a little bit the efficiency code, which appears during production, of the converted mechanism not including the biggest sun gear, thus the efficiency expression of the 3K planetary train can be obtained.