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1. (WO2018062198) GEAR PUMP OR GEAR MOTOR

Pub. No.:    WO/2018/062198    International Application No.:    PCT/JP2017/034780
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Wed Sep 27 01:59:59 CEST 2017
IPC: F04C 2/18
F03C 2/08
F04C 11/00
F04C 15/00
Applicants: DAIKIN INDUSTRIES, LTD.
ダイキン工業株式会社
Inventors: TSUZUKI, Katsunari
都築 克成
Title: GEAR PUMP OR GEAR MOTOR
Abstract:
The present invention is configured so that, even if there is no space for installing a piston in contact with the center of the front end surface of a drive shaft, thrust force occurring in a drive gear can be cancelled. The primary pump 2 of this gear pump 1 has: a primary drive gear 20 and a primary driven gear 21, which are helical gears; and a primary drive shaft 27 having a primary connection section 30 formed on the front end surface thereof. A secondary pump 3 has a secondary drive shaft 54 having a secondary connection section 60 formed at the front end surface thereof. The gear pump 1 is provided with: a connection member 70 for connecting the primary connection section 30 and the secondary connection section 60 and in contact with the outer edge of the front end surface of the primary drive shaft 27; and a space 90 which faces the receiving surface 74 of the connection member 70, the receiving surface 74 facing the secondary pump 3, and to which operating fluid can be supplied.