Vane pump

A vane pump, pump cavity technology, applied in the direction of pumps, pump components, rotary piston pumps, etc., can solve problems such as vane damage
CN102365461AInactive Publication Date: 2012-02-29TAIHO INDUSTRIES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TAIHO INDUSTRIES CO LTD
Publication Date
2012-02-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

Disclosed is a vane pump (1) wherein lubricant is supplied to a pump chamber (2A) via an axial oil supply port (11a), a diametric oil supply port (11b), and an axial oil supply groove (11c) of an oil supply passage (11). A gas passage (13) is comprised of a gas groove (13a) which is formed in the outer peripheral surface of a shaft (3B) of a rotor (3) and which has an end portion communicating with an outer space. The other end portion of the gas groove is intermittently overlapped with the axial oil supply groove (11c) by the rotation of the rotor, so as to communicate with the axial oil supply groove (11c). The gas passage is comprised of the gas groove (13a) in the shape of a groove, and accordingly, tends not to become clogged in comparison with a conventional apparatus in which the gas passage (13) is comprised of a through-hole, and thus, the flow passage area of the gas passage can be reduced. Therefore, air can be prevented from being introduced from the gas passage into the pump chamber, and the drive torque of an engine can be prevented from increasing.
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Description

technical field

[0001] The present invention relates to a vane pump, and more specifically, to a vane pump in which an oil supply passage through which lubricating oil flows is formed inside a rotor, and lubricating oil is intermittently supplied into a pump chamber by rotation of the rotor. Background technique

[0002] Conventionally, there is known a vane pump (Patent Document 1) that includes a housing having a substantially circular pump chamber, a rotor that rotates at an eccentric position relative to the center of the pump chamber, and rotates the rotor to rotate the pump chamber. The pump chamber is always divided into a plurality of vanes, the oil supply passage intermittently communicated with the pump chamber by the rotation of the rotor, and the pump chamber and the pump chamber when the oil supply passage communicates with the pump chamber by the rotation of the rotor. gas pathways communicating with the external space,

[0003] Furthermore, the oil supply pas...

Claims

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