The gear form of internal gearing cycloidal gear pump has important influence on machining and characteristics of pump, such as flow rate, fluctuation rate and noise etc.

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.

Internal gear pump structure and other gear pump structure similar to, mainly by the outer rotor and rotor, pump shaft, pump body, the front cover, bracket, sealing device, bearing, etc.