The friction and abrasion of the vane tip has been one of the main factors for the design of rotary vane compressor. Besides the contact force between vane tip and cylinder internal wall, the moving range and regulation of the contact point have big effect on the friction and abrasion of vane tip. On the basis of geometric analysis the position and moving range of contact point is derived in this paper, and an algorithm for the perfect profile of vane tip is proposed. Given an instance, the relative calculation and analysis are done, and results show that improper tip profile can cause "cuspidal point slippage" in the movement of vane.
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