新型摆线转子泵啮合特性的研究

对一种新型圆弧摆线内啮合转子泵进行了研究.新型转子泵在保证连续传动的基础上,将密封与传动的功能赋予齿廓的不同部分,从而避免了内转子的每个齿始终与外转子接触,使得其啮合特性得到极大改善--从根本上消除了普通转子泵所特有的外转子滑动系数出现极大值的现象,并使啮合角的变化范围更加合理.与普通转子泵相比,新型转子泵大大减少了磨损,降低了对转子制造安装精度的要求.因此,新型转子泵可以采用较普通转子泵更高的工作转速、更多的齿数,并获得更大的流量、更小的波动和更小的磨损.分析了新型圆弧摆线内啮合转子泵内外转子齿廓的构成及啮合原理,并与普通摆线转子泵进行了啮合特性对比分析.

Study on the meshing characteristic of a new cycloidal pump

A new type of arc cycloidal internal meshing rotary pump was studied. In this new type of pump, different parts of the tooth profile are endowed with different functions like sealing and driving, while maintaining continuous transmission. As a result, continuous contact of each tooth of the inner rotor with the outer rotor is avoided, which results in great improvement of its meshing characteristic-the maximization of the sliding coefficient of the outer rotor in general cycloidal pump, is totally eliminated, and the varying range of the meshing angle becomes more reasonable. Compared with general cycloidal pump, this new type of pump reduces wear greatly and degrades the requirement of manufacturing and assembling accuracies. So, this new type of cycloidal pump is capable of operating with higher rotation speed and more teeth, higher specific flow rate, less flow fluctuation and wear. In this paper, the profile of inner and outer rotors and the meshing principle of this new type of cycloidal pump are discussed. The meshing characteristic of the pump is compared with that of general cycloidal pump.