Title:
ベーンポンプ装置
Document Type and Number:
Japanese Patent JP6900429
Kind Code:
B2
Abstract:
To provide a vane pump device which can reduce the pressure of a pump chamber at a start of a suction process.SOLUTION: A vane pump device has a rotor which rotates while supporting ten pieces of vanes so as to be movable to a rotation radial direction, and a cam ring having an internal peripheral face opposing an external peripheral face of the rotor. The vane pump device is transited to a suction process for sucking a working fluid into at least a pump chamber, and to a discharge process for discharging the working fluid from the pump chamber by a change of a volume of the pump chamber caused by a change of a distance from a rotation center of the rotor up to the internal peripheral face of the cam ring according to a rotation angle of the rotor, and after a zone in which distances are the same covers a prescribed rotation angle, when setting an angle for equally dividing a rotation angle at which an end part of a discharge port at a downstream side is formed, and a rotation angle at which an end part of a suction port at an upstream side is formed as a center angle, a start point angle being a rotation angle at which the distance starts to become long is 2.5 degrees or smaller in a rotation angle difference with respect to the center angle.SELECTED DRAWING: Figure 13
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Inventors:
Naoya Taga
Application Number:
JP2019141744A
Publication Date:
July 07, 2021
Filing Date:
July 31, 2019
Export Citation:
Assignee:
Hitachi Astemo, Ltd.
International Classes:
F04C2/344
Domestic Patent References:
| JP52009043Y1 | ||||
| JP32006152Y1 | ||||
| JP63159686A |
Foreign References:
| US20110223050 |
Attorney, Agent or Firm:
Fumio Ogata