Vane pump with coated vanes
AssigneeShowa Corporation
InventorsYoshihiro Tsukahara, Tomohiro Tanaka
Life of this patent
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Abstract
Provided is a vane pump. In the vane pump, a high-hardness main coating layer is provided on a distal end portion of each vane, and an intermediate coating layer having an intermediate hardness between a hardness of a base material of the vane and a hardness of the main coating layer is provided between the base material of the vane and the main coating layer.
Claims16
A vane pump in which vanes are received into grooves formed at a plurality of circumferential positions of a rotor fixed to a pump shaft, and distal end portions of the vanes are pressed and slid on a cam ring, comprising:
- an intermediate coating layer provided on a base material of the distal end portion of each of the vanes;
- a high-hardness main coating layer provided on the intermediate coating layer;
- and the intermediate coating layer has an intermediate hardness between a hardness of the base material of the vane and a hardness of the main coating layer;
- wherein the intermediate coating layer is made of CrN, and the main coating layer is made of TiCrN.
A vane pump in which vanes are received into grooves formed at a plurality of circumferential positions of a rotor fixed to a pump shaft, and distal end portions of the vanes are pressed and slid on a cam ring, comprising:
- an intermediate coating layer provided on a base material of the distal end portion of each of the vanes;
- a high-hardness main coating layer provided on the intermediate coating layer;
- and the intermediate coating layer has an intermediate hardness between a hardness of the base material of the vane and a hardness of the main coating layer;
- wherein a coloring coating layer is formed on an outside of the main coating layer;
- and
- wherein a thickness of the intermediate coating layer deposited on a surface of the base material is in a range of 0.4 to 0.8 .mu.m, and a thickness of the main coating layer deposited on a surface of the intermediate coating layer is in a range of 2.0 to 3.0 .mu.m.
A vane pump in which vanes are received into grooves formed at a plurality of circumferential positions of a rotor fixed to a pump shaft, and distal end portions of the vanes are pressed and slid on a cam ring, comprising:
- an intermediate coating layer provided on a base material of the distal end portion of each of the vanes;
- a high-hardness main coating layer provided on the intermediate coating layer;
- and the intermediate coating layer has an intermediate hardness between a hardness of the base material of the vane and a hardness of the main coating layer;
- wherein a thickness of the intermediate coating layer deposited on a surface of the base material is in a range of 0.4 to 0.8 .mu.m, and a thickness of the main coating layer deposited on a surface of the intermediate coating layer is in a range of 2.0 to 3.0 .mu.m.
Dependencies are inferred from the claim text.