Cartridge vane pump

Abstract

A cartridge vane pump includes: a body-side side plate that is brought into contact with end surfaces of a rotor and a cam ring; first and second discharge ports that are formed in the body-side side plate; and an adapter that is formed with first and second connection channels for connecting the first and second discharge ports formed in the body-side side plate and first and second discharge channels formed in a body.

1 . A cartridge vane pump accommodated in a body of fluid pressure device in an attachable and detachable manner, the cartridge vane pump comprising:
 a rotor linked to a driving shaft, the rotor being configured to be rotationally driven;   a plurality of slits formed in a radiating pattern so as to have opening portions at an outer circumference of the rotor;   vanes respectively inserted into the slits in a freely slidable manner;   a cam ring configured to have an inner circumference cam face with which tip end portions of the vanes are brought into sliding contact;   pump chambers defined between the rotor, the cam ring, and the adjacent vanes;   a cover member brought into contact with one end surfaces of the rotor and the cam ring, the cover member being fixed to the body;   a side plate brought into contact with other end surfaces of the rotor and the cam ring;   a discharge port formed in the side plate, the discharge port being configured such that working fluid discharged from the pump chambers is guided thereinto; and   an adapter formed with a connection channel for connecting the discharge port formed in the side plate and a discharge channel formed in the body.   
     
     
         2 . The cartridge vane pump according to  claim 1 , further comprising
 a biasing member configured to constantly bias the side plate towards the rotor.   
     
     
         3 . The cartridge vane pump according to  claim 2 , wherein
 the biasing member is a seal member provided between the adapter and the side plate in a compressed state, the biasing member being the seal member configured to surround and seal an outer circumference of the discharge port formed in the side plate.   
     
     
         4 . The cartridge vane pump according to  claim 1 , wherein
 in a state in which the cartridge vane pump is accommodated in the body, the adapter defines, with a bottom surface of the body, a ring-shaped high-pressure chamber into which high-pressure working fluid that has been discharged from the pump chambers is guided, the adapter being configured to bias the side plate towards the rotor by the high-pressure working fluid that has been guided to the high-pressure chamber.   
     
     
         5 . The cartridge vane pump according to  claim 1 , wherein
 the side plate is formed of a sintered metal, and   the adapter is formed of an aluminum alloy.