Internal gear pump has two kinds of tooth profile namely: involute profile and cycloidal tooth profile.

内啮合齿轮泵有两种齿形即：渐开线齿形和摆线齿形。

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Cycloidal tooth profile of the internal gear pump, also called cycloidal rotor pump, pump the small gear and internal gear only related a tooth, so the internal gear pump do not need to set partition.

摆线齿形的内啮合齿轮泵又叫做摆线转子泵，泵中的小齿轮和内齿轮只相关一个齿，因此这种内啮合齿轮泵不需要设置隔板。

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