Conference Year
2018
Keywords
Rotary Compressor, Vane, Wear, Friction power, Lubrication
Abstract
In this article, a numerical method was established to analyze the friction power and wear of vane in the rotary compressor. In this method, the time domain was divided into many steps, the physical process was simplified as an explicit model. At each delta time step, three sub models were calculated iteratively, the geometric model, the contact model and the friction model. Firstly, in the geometric model, geometric kinematics of vane and piston were obtained by calculating multi body dynamical equation. Secondly, in the contact model, Reynolds equation and elastic contact equation were solved as a coupled problem to get the thickness distribution of oil film in the sliding surface. From the oil film thickness distribution, the asperity contact stress and oil film pressure could be obtained, and all other mechanical information could be calculated. Thirdly, in the friction model, the friction power and wear depth distribution were obtained. The friction power was calculated by the time integration of PV value. The PV value was calculated by substituting asperity contact stress and vane sliding velocity. The friction power was input into the Archard wear theory to get the wear depth distribution. Base on this numerical method, the friction power and wear depth distribution of vane friction pairs were got for different rotary compressors in different conditions. Some of the experiments can be replaced by this numerical method, especially the durability experiment. The parametric sensitivity analysis could be done, so, furthermore, it can offer design reference for rotary compressor.