This paper presents a complete dynamic analysis of roller and vane of a rotary compressor widely used for air-conditioners. An approach and a set of equations are developed estimating the type of motion at vane tip and roller interface and calculating the frictional force in accordance with the motion type. The forces on roller caused by relative motion between roller and cylinder wall are analyzed. The relative motion between vane tip and roller and the rotating velocity of roller of inverter rotary compressors and HFC410A rotary compressors are discussed in detail. The effect of secondary pressure pulse in compression chamber on the pursuing ability of vane as the compressors operate at high speed is shown.
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