Loose volume model research on the interference fit compressor rotor using the method of temperature difference

Abstract

In order to dismantle non-destructively the impeller and shaft under interference fit, the loaded temperature is planned reasonably for the temperature difference dismantling process. Through selecting suitable loaded temperature parameters, the desired dismantling effect can be acquired. Through theoretical analysis and FEM calculation with ANSYS, the loose volume model of the mating surfaces between the impeller and the shaft during the temperature difference dismantling process is built. Besides, through changing relevant parameters, the influence of the temperature heating location and the heating time on the loose amount between the shaft and hole is analyzed, and the reasonable heating temperature, heating location and heating time are obtained. The results show: when the other factors are constant, the temperature loading on the impeller hub is better than on the flow channel, and when the heating time is 1 400 s, the loose amount between the shaft and hole is the largest.

Keywords

• interference fit
• loose volume
• heating time
• heating location