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接触应力是摆线油马达(下面简称马达)重要的验算项目。在设计中,若马达参数选择得不合理,就有可能使其接触应力超过许用接触应力,从而使其使用压力降低,或者在使用中发生摆线轮与针柱咬粘。一、接触应力σ的理论计算为了探讨方便,假设如下:(1)装配间隙为零,无泄漏。(2)运动零件间,无摩擦损耗。(3)各零件无受力变形。马达针柱的齿廓为圆弧,摆线轮齿廓是短幅外摆线。针柱与摆线轮的接触,可以认为是二个瞬时圆柱体接触,因此接触应力可根据赫兹接触应力公式计算。赫兹接触应力公式为由外摆线形成的原理可知:(1)所有针柱都与摆线轮的齿廓相接触。(2)在摆线轮运动过程中,所有针柱与摆线轮齿廓啮合的公法线
Contact stress is the cycloid oil motor (hereinafter referred to as the motor) an important checking items. In the design, if the motor parameters are not properly selected, it is possible to make the contact stress exceeds the allowable contact stress, so that the use of pressure to reduce, or occur in use, the cycloid and the needle bite stick. First, the theoretical calculation of contact stress σ In order to explore convenience, the assumptions are as follows: (1) Assembly clearance is zero, no leakage. (2) moving parts, no friction loss. (3) All parts without force deformation. Motor needle column tooth profile for the arc, cycloid profile is short epicyclic. The contact between the pin and the cycloidal wheel can be considered as two instantaneous cylinder contacts, so the contact stress can be calculated according to the Hertz contact stress formula. Hertz contact stress formula for the formation of the principle from the epicyclone know: (1) All the pins are in contact with the cycloid profile. (2) During the motion of the cycloid gear, all the normal lines of the pins that mesh with the cycloidal gear tooth profile