FINITE ELEMENT MODEL FOR MOTION AND CONTACT ANALYSIS IN A TROCHOIDAL-TYPE MACHINE

摘要

In a trochoidal-type machine, the rotor and chamber will be in direct contact when apex seals are removed. The reliability and efficiency of the machine will depend on the magnitude of these contact forces. In this paper, a finite element model that simulates the planetary rotation of a rotor inside a chamber is developed. The model is then used to analyze contact forces between rotor and chamber for a range of shaft angle. The results from this model are compared with the results from a simplified analytical model. Good agreements are obtained. This model will be further developed in the future to do dynamic contact analysis in a trochoidal-typc machine without apex seals.