Abstract: With the rapid expansion of new refrigerants and new fields, and the increasingly stringent customer conditions, the reliability requirements of rotary compressors are getting higher and higher, but there is no mature wear prediction method for friction pairs in the industry. Aiming at a R290 heat pump compressor, taking the friction pair of vane-blade groove as an example, starting with the basic models of boundary lubrication, mixed lubrication and fluid lubrication, integrating the influencing factors such as load, oil-refrigerant mixture properties and speed during the operation of the compressor, the classical Archard model is adopted. A theoretical model for predicting the wear of the friction pair of the rotary compressor is established, and the simulation results are consistent with the wear data after the long-term reliability test; The establishment of the method is helpful for the rapid reliability prediction of the rotary compressor and the improvement of the development speed.

Key words: Wear, Compressor, Reliability, Refrigerant