VANE PUMP

摘要

A first main back pressure supply port 55 and a first subsidiary back pressure supply port 56 are formed in a first sliding contact surface 5a of a first side member 5, the first main back pressure supply port 55 is formed in a groove shape in the first sliding contact surface 5a, and the first subsidiary back pressure supply port 56 communicates with the first subsidiary discharge port 54. A second main back pressure supply port 65 and a second subsidiary back pressure supply port 66 are formed in a second side member 6, the second main back pressure supply port 65 passes through the second side member in the axial direction and the second subsidiary back pressure supply port 66 is formed in a groove shape in a second sliding contact surface 6a.

主权项

1. A vane pump comprising:
a pump unit including: a rotor in which a plurality of vanes are slidably mounted in a radial direction; a cam ring inside which the rotor is installed; a first side member having first main and subsidiary intake ports and first main and subsidiary discharge ports along a circumferential direction on both sides in the axial direction of the cam ring; and a second side member having second main and subsidiary intake ports and second main and subsidiary discharge ports along the circumferential direction, wherein a first main back pressure supply port and a first subsidiary back pressure supply port are formed in a first sliding contact surface of the first side member, the first main back pressure supply port is formed in a groove shape in the first sliding contact surface, the first subsidiary back pressure supply port is configured so as to communicate with the first subsidiary discharge port, a second main back pressure supply port and a second subsidiary back pressure supply port are formed in the second side member, the second main back pressure supply port passes through the second side member in the axial direction, and the second subsidiary back pressure supply port is formed in a groove shape in a second sliding contact surface without passing through the second side member in the axial direction.