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1. (WO2018062104) PUMP DEVICE

Pub. No.:    WO/2018/062104    International Application No.:    PCT/JP2017/034550
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Tue Sep 26 01:59:59 CEST 2017
IPC: F04C 15/06
F04C 2/10
F04C 15/00
H02K 7/14
H02K 21/14
Applicants: NIDEC TOSOK CORPORATION
日本電産トーソク株式会社
Inventors: HOMMA Kazuhiro
本間 和博
ITO Yosuke
伊東 陽介
Title: PUMP DEVICE
Abstract:
This pump device 10 is provided with a shaft 41, a motor unit 20 which rotates the shaft 41, and a pump unit 30 which is driven by the motor unit 20 via the shaft 41 and discharges oil. The pump device 10 comprises a first oil flow path which connects the inside of the pump unit 30 and the inside of a housing 12, a second oil flow path which is disposed between a stator 50 and a rotor 40, and a third oil flow path which passes radially outside of the stator 50 and the rotor 40 to connect from the second flow path to an inlet 32c of the pump. One or multiple grooves 55 are provided on the outer peripheral surface of the rotor 40 or the inner peripheral surface of the stator 50, and the grooves 55 are inclined with respect to the direction of travel of the oil.