Impeller pump system

The utility model relates to an impeller pump system. Impeller pump system includes the impeller pump, two -position three way pilot control valve and off -centre apart from set piston jar, two -position three way pilot control valve's first entry and the pressure hydraulic fluid port of impeller pump intercommunication, press hydraulic fluid port and two -position three way pilot control valve's the second entrance to communicate, two -position three way pilot control valve's export and the second entrance selectively communicate according to the pressure of the pressure oil of first entry, and the export communicates with the eccentric pole chamber that has apart from the set piston jar, eccentric piston apart from the set piston jar supports and leans on on the stator of impeller pump. Adopt guide's fluid to carry out guide's control to two -position three way directional control valve to avoided the adoption of the spring that rigidity is big, the linearity of impeller pump pressure regulating is good, ha