The influence of the design parameters on the profile sliding in an internal hypocycloid gear pair

Abstract

While hypogerotor pump working, the profiles of the inner and outer rotors match together following gearing rule of the hypocycloidal gear-set. Therefore, those two opposite profiles matching each other like in generation process, and during action, one will roll and slip in relation with the other. Relative sliding between two profiles in the contact point causes wearing out of the tooth profile. Aiming to evaluate influence of the geometrical dimension parameters of the pump rotor profile on the wear, in this paper, the authors established equation for determining slip coefficient from geometrical dimensions. Furthermore, the authors have investigated and evaluated the phenomenon of the profile slipping to find out the geometrical dimensional parameters for avoiding unequal wearing of the inner and outer rotors of the hypogerotor pump.