초록 ▼

A variable displacement vane pump is provided in which a pair of rings having oval-shaped inner contours are rotatably mounted in side-by-side relationship. The rings are adapted for relative rotation to each other from a first position wherein the inner contours are in register with each other and

A variable displacement vane pump is provided in which a pair of rings having oval-shaped inner contours are rotatably mounted in side-by-side relationship. The rings are adapted for relative rotation to each other from a first position wherein the inner contours are in register with each other and a moved position wherein the inner contours are out-of-register, and means are provided for effecting the relative rotation, which include a gear system operatively connected to the rings. A rotor member is mounted for rotation within the rings and is formed with a plurality of circumferentially spaced recesses which extend the entire axial length of the rotor. Each of the recesses carries a pair of vanes in abutting relationship. The vanes are mounted for radial movement in the recesses and are adapted for slidable contact with the inner contours of the rings. The vanes form two side-by-side rows of vanes with each row in tracking relationship with the inner contours of the rings. With the inner contours rotated to the first position, rotation of the vanes will pump a maximum volume of fluid through the pump and with the inner contours rotated to the moved position, the vanes will pump a reduced volume of fluid through the pump.

대표청구항 ▼

A variable displacement vane pump comprising a casing having an inlet and an outlet, a cavity formed in said casing between said inlet and said outlet a pair of rings having oval-shaped inner contours and rotatably mounted in said cavity in side-by-side relationship, said rings being adapted for rel

A variable displacement vane pump comprising a casing having an inlet and an outlet, a cavity formed in said casing between said inlet and said outlet a pair of rings having oval-shaped inner contours and rotatably mounted in said cavity in side-by-side relationship, said rings being adapted for relative rotation to each other between a first position wherein said inner contours are in register and a moved position wherein said inner contours are out-of-register, a rotor mounted in said cavity for rotation within said rings and having a plurality of circumferentially spaced recesses, a pair of vanes movably mounted in abutting relationship in each of said recesses and adapted for slidable contact with said inner contours of the rings, means operatively connected to said rings for effecting said relative rotation comprising gear segments formed on said rings, a pair of pinion members rotatably mounted in said casing in operative engagement with said gear segments, a rack member having linear rack gears in operative engagement with said pinion members, and said rack member being movable substantially radially of said rings.