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    GEAR PUMP OR GEAR MOTOR
    1.
    发明公开
    GEAR PUMP OR GEAR MOTOR 审中-公开

    公开(公告)号：EP3203083A4

    公开(公告)日：2018-03-28

    申请号：EP15846157

    申请日：2015-09-29

    申请人： DAIKIN IND LTD

    发明人： TSUZUKI KATSUNARI

    IPC分类号： F04C2/18 ,  F03C2/08 ,  F04C15/00

    CPC分类号： F04C2/16 ,  F01C21/02 ,  F01C21/08 ,  F03C2/08 ,  F04C2/18 ,  F04C15/00 ,  F04C15/06 ,  F04C2240/30 ,  F04C2240/50

    摘要： Friction between end portions of drive and idler shafts and pistons lead to reduction in mechanical efficiency and/or wearing out of parts. A gear pump 1 of the present invention includes: a casing 6; a drive gear 2 and a driven gear 3 each configured as a helical gear, the drive gear 2 and the driven gear 3 meshing with each other in the casing 6 and partitioning the inside of the casing 6 so as to include a high-pressure space and a low-pressure space; and a drive-side space 16 and an idler-side space 116 each configured to allow pressure therein to become higher than a pressure in the low-pressure space, the drive-side space 16 facing an end portion of a drive shaft 4 rotatably supporting the drive gear 2, the idler-side space 116 facing an end portion of an idler shaft 5 rotatably supporting the driven gear 3. The end portion of the drive shaft 4b is pushed in a predetermined direction by working fluid supplied to the drive-side space 16, and the end portion of the idler shaft 5b is pushed in the predetermined direction by working fluid supplied to the idler-side space 116.