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1. (WO2018198368) VANE PUMP

Pub. No.:    WO/2018/198368    International Application No.:    PCT/JP2017/017072
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 29 01:59:59 CEST 2017
IPC: F04C 18/344
Inventors: OGURA Takahiro
小倉 崇寛
In this vane pump, inner and outer walls constituting two layers are integrally formed in an annular shape in a pump housing (15), the lower section of an inner circumferential wall (22) is closed by a bottom wall (24) and the upper section is closed by an upper plate (27), and a track-shaped accommodation space (30) is thereby defined. A rotor (31) is arranged within the accommodation space (30) and a pump chamber (32) is thereby defined. When the rotor (31) is rotationally driven, a vane (33) on the outer circumference thereof causes the capacity of the pump chamber (32) to change and air is taken in and discharged. Openings (49) are formed on both the front and rear sides of the outer circumferential wall (16) of the pump housing (15), an annular space between the inner circumferential wall (22) and the outer circumferential wall (16) is made to function as a left-side ventilation path (50a) and a right-side ventilation path (50b), and heat within the accommodation space (30) is released to the exterior by cooling air flowing through the interior of said ventilation paths.