In order to utilize HFC refrigerant, which is said to m'ake lubricating condition worse, as a working fluid in a refrigeration cycle, it is needed to evaluate the lubricating condition at sliding parts accurately. In this study, we analyzed oil film at vane sides in a vane compressor with a hydrodynamic lubrication theory. We also analyzed the vane behavior, frictional loss on the vane side and leakage flow through these clearances under steady-state operating condition. It is clarified that the inclination of the vane in a vane slot of a rotor changes with rotor rotation and the vane is pressed strongly on its trailing side against an edge of the vane slot when pressure of working fluid in compression chamber approaches discharge pressure. The calculated results of vane behavior and contact forces are influenced by method of modeling of the oil film pressure under the condition that the vane comes into contact with the rotor.
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