VANE PUMP DEVICE

• Main Author: TAGA NAOYA
• Format: Patent
• Language: Chinese; English
• Published: 18.01.2022
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

A vane pump device that has: a rotor that supports 10 vanes so as to be movable in the rolling radius direction and rotates same; and a cam ring having an inner circumferential surface facing the outer circumferential surface of the rotor. The vane pump device transitions to a suction step in which hydraulic fluid is sucked into at least a pump chamber and a discharge step in which the hydraulic fluid is discharged from the pump chamber, by the capacity of the pump chamber changing in accordance with the rotation angle, as a result of the distance from the rotational center of the rotor to the inner circumferential surface of the cam ring changing in accordance with the rotation angle of the rotor. A starting angle, being a rotation angle at which the distance starts to increase after segments having the same distance have reached a prescribed rotation angle, has a rotation angle difference of no more than 2.5 degrees relative to a center angle, when the center angle is an angle that equally divides a rotatio