Stress of Rotating Elastic Interference Fits Used in a Micro Gas Turbine

Abstract

Interference fits, which are widely used in flexible couplings, can transfer large torques while avoiding unbalance. The model of the interference fit is built, and the exact solution of the radial stress, hoop stress and tangential stress of the rotating interference fits are obtained. Then taking the interference fits of the coupling for a high speed micro gas turbine as an example, the radial stress and Von Mises stress are plotted using the numerical method. Meanwhile, the minimum interference fit of the coupling is defined.