变齿厚渐开线齿轮副啮合效率研究

Research on the Meshing Efficiency of Variable Tooth Thickness Gear

由于变齿厚渐开线啮合副变位系数沿轴向变化的特点,其啮合角、锥角、重合度、不同端截面齿顶圆上的压力角、滑动率等参数与普通渐开线啮合副不同,其啮合效率计算也与普通渐开线啮合副有所区别。分析了变齿厚齿轮啮合副效率的计算特点和影响因素,如变位系数对变齿厚齿轮副重合度和啮合效率的影响;在此基础上,提出了一种新型效率计算方法;通过实例,进行了啮合效率计算分析,并进行了锥角、齿条刀具倾斜角和端面啮合角对啮合效率的影响分析。

Due to the characteristics of modification coefficient change along the axial in variable tooth thickness gears,the contact angle,cone angle,contact ratio,pressure angle of addendum circle in different normal section,sliding rate and other parameters are deviated from common involute meshing pairs,and the meshing efficiency calculation formula is also different with the common involute meshing pairs.Calculation characteristics and influencing factors of conical involute gears,such as the influence of the modification coefficient on the contact ratio and mating efficiency in conical involute gears are analyzed.Based on this,a new method for calculating the efficiency is proposed.Calculation and analysis of meshing efficiency are carried out by some examples,and the impact factors of cone angle,rack tool inclining angle and transverse contact angle to meshing efficiency are analyzed.