VANE PUMP - TAIHO KOGYO CO LTD

Title:

VANE PUMP

Document Type and Number:

WIPO Patent Application WO/2018/084105

Kind Code:

A1

Abstract:

Provided is a vane pump capable of suppressing the sudden opening of a reed valve. Thus, a vane pump (1) is equipped with: a housing (2) having a circumferential wall section (200), a floor wall section (201), and a pump chamber (A); a rotor (3) capable of rotating and positioned in the pump chamber (A); a vane (4) which partitions the pump chamber (A) into a plurality of operating chambers (A1, A2) and is provided on the rotor (3) so as to be capable of sliding in the radial direction; and a reed valve (5) for opening and closing a discharge hole (201a) in the floor wall section (201). The position where the sliding direction of the vane (4) relative to the rotor (3) reverses from radially outward to radially inward is a reference position (θ1), and the section on the discharge hole (201a) side from the reference position (θ1) in the pump chamber (A) is the discharge section (AD). A pressure relief groove (201b) is positioned in the section of the floor wall section (201) that corresponds to the discharge section (AD), while maintaining a gap (E) between said groove and the circumferential wall section (200). When the vane (4) overlays the pressure relief groove (201b), the pair of operating chambers (A1, A2) on both sides of the vane (4) in the direction of rotation are connected to one another by the pressure relief groove (201b).

Inventors:

SUZUKI YUJI (JP)
UTO AKIHIRO (JP)
MIYARA NAOYUKI (JP)
HARA HIROKI (JP)
KIYOMIYA SHINSUKE (JP)
FUJII AKIRA (JP)

Application Number:

PCT/JP2017/039087

Publication Date:

May 11, 2018

Filing Date:

October 30, 2017

Export Citation:

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Assignee:

TAIHO KOGYO CO LTD (JP)
TOYOTA MOTOR CO LTD (JP)

International Classes:

F04C18/344; F04C29/12

Foreign References:

JP2004263690A	2004-09-24
JP2002070774A	2002-03-08

Other References: