The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.
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.
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这两种内啮合齿轮泵的工作原理和外啮合齿轮泵的工作原理相同。
These two kinds of internal gear pump working principle and external gear pump working principle the same.