标准直齿圆柱齿轮传动接触强度计算的研究  

Study on the contact strength calculation of standard cylindrical spur gear transmission

作　　者：胡爱萍[1] 刘善淑[1] 陈权[1] 

机构地区：[1]江苏工业学院机械与能源工程学院,江苏常州213016

出　　处：《机械设计》2008年第11期45-48,共4页Journal of Machine Design

摘　　要：针对渐开线齿轮传动接触强度计算方法的不同,对外啮合标准直齿圆柱齿轮传动的接触强度计算进行了研究。发现以节点作为接触应力计算点的接触强度计算方法误差较大,埋下齿面早期点蚀的隐患较大。隐患大小与模数无关,而与小齿轮齿数和两轮齿数比有关。当齿数比一定,小齿轮齿数越少,或当小齿轮齿数一定,两轮齿数比越大,则齿面最大接触应力与节点处接触应力的应力比就越大,造成齿面早期点蚀的隐患越大。绘制了渐开线外啮合标准直齿圆柱齿轮传动的应力比随两轮齿数比和小齿轮齿数的变化曲线,利用应力比对以节点作为接触应力计算点的接触强度计算公式进行了修正,可实现既精确又简便的接触强度计算。Aimed at the differences on the calculation methods of contact strength of involute gear transmission, a study had been carried out on the contact strength calculation of the outer meshed standard cylindrical spur gear transmission. It has been discovered that the contact strength calculation method that takes pitch point as the computing point of contact stress would bear a rather big error, and buried hidden troubles in early staged spot corrosion of tooth surface. The magnitude of hidden trouble bears no relation with the modulus but has relations with the teeth number of pinion and teeth number ratio of two gears . When the ratio of teeth numbers is given, the less the pinion teeth number is, or when the teeth number of pinion is fixed and the bigger the teeth number ratio of two gears is, the larger the stress ratio of maximum contact stress of tooth surface with contact stress at pitch point place would be, thus the hidden trouble that causes early staged spot erosion of tooth surface would be much larger. Curves of the stress ratio of the involute outer meshing standard cylindrical spur gear transmission that vary along with the teeth number ratios of two gears and the teeth number of pinion were protracted. Utilizing the stress ratio, the modification was carried out on the contact strength calculation formula that takes pitch point as the contact stress calculation point, thus the both accurate and convenient contact strength calculation can be realized.

关 键 词：齿轮传动 接触强度 强度计算 

分 类 号：TH132.4[机械工程—机械制造及自动化]