Abstract: The radial compliance design of scroll compressor can avoid the damage of liquid hammer or solid impurities through the concession of moving disc. However, too large compliance angle leads to excessive contact force between moving and stationary disc and intensified friction. Too small compliance angle leads to insufficient contact force between moving and stationary disc, contributing to leakage. To obtain a more appropriate radial compliance angle, CFD simulation is used to study the influence of radial compliance driving angle on the dynamic gas force and the contact force between the moving and stationary disc. The results show that the contact force between the moving and stationary disc decreases with the reduction of driving angle. Through the whole machine test at different angles, it is found that the input force under DOE-B condition decreases by about 1.0% when the driving angle is decreased by 10°. The efficiency is improved by about 1.0%, which verifies the effectiveness of the established CFD simulation method. The research can provide theoretical and practical guidance for the optimal design of radial compliance driving angle of scroll compressor.

Key words: Radial compliance, Contact force, Driving angle, Scroll compressor, CFD computation