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1. (WO2018159474) PUMP DEVICE

Pub. No.:    WO/2018/159474    International Application No.:    PCT/JP2018/006625
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Sat Feb 24 00:59:59 CET 2018
IPC: F04C 15/06
F04C 2/10
F04C 15/00
Applicants: NIDEC TOSOK CORPORATION
日本電産トーソク株式会社
Inventors: KOBAYASHI Yoshiyuki
小林 喜幸
HOMMA Kazuhiro
本間 和博
HIGUCHI Koji
樋口 孔二
ITO Yosuke
伊東 陽介
Title: PUMP DEVICE
Abstract:
This pump device 10 comprises a motor unit 20 which rotates the shaft 41, a pump unit 30 which is driven by the shaft 41 and which sucks in and delivers oil to the motor unit 20. The pump device 10 comprises: a first flow path through which, by negative pressure in the pump unit 30, oil is sucked through a suction port 32c provided in a pump cover 32 into the pump unit 30; a second flow path through which, by pressurization in the pump unit 30, oil is delivered from an delivery port 31c provided in the pump body 31 into the motor unit 20; a third flow path which is provided between the stator 50 and the rotor 40; a fourth flow path 4 which is provided between the stator 50 and the housing 12; and a fifth flow path through which the oil inside of the motor unit 20 is discharged from a discharge port 12b provided in the housing 12.