The well-designed, precision-machined arc blades reduce the compressive stress of the blades on the curves within the stator and increase the service life of the stators and blades The stator adopts an advanced high-power impact-free transition curve so that the blade has a good state of motion and force to ensure that the blade and the stator are between the blade and the stator Good contact and minimizes flow loss, pressure and flow ripple with less noise and longer life The side panels are hydraulically balanced for better volumetric efficiency The overall reliability of the oil pump in the selection of key parts and advanced heat treatment process is further improved The use of plug-in structure of the main internal parts made into a component form of the pump core replacement can be completed in a few minutes Good interchangeability Repair method.