CONTROL VALVE, IMPACT DEVICE AND METHOD
    5.
    发明公开

    公开(公告)号:EP4261441A1

    公开(公告)日:2023-10-18

    申请号:EP22168155.4

    申请日:2022-04-13

    摘要: A control valve, an impact device for a rock breaking apparatus, and a method. The control valve (26) is an elongated piece with a central axis and radial outer and inner surfaces (Ros, Ris). The control valve comprises several control surfaces at axial distances from each other for controlling hydraulic fluid flows (Hff) in response to axial control movement (M). One or more radial surfaces of the control valve comprise one or more slanted surface (SS) longitudinal direction of which have oblique orientation in relation to the central axis (Ca) of the control valve. Then the control valve rotates or turns during a working cycle due to hydraulic flow effecting on the slanted surfaces.

    HYDRAULIC MACHINE
    9.
    发明公开
    HYDRAULIC MACHINE 审中-公开

    公开(公告)号:EP4155556A1

    公开(公告)日:2023-03-29

    申请号:EP22178154.5

    申请日:2017-12-14

    摘要: A hydraulic machine comprising a first working fluid supply (110), and a controller (20), the controller calculates a first required flow rate as a function of a first maximum allowable flow rate and a value of a first signal and calculates a third required flow rate as a function of a value of a third signal, and controls the first working fluid supply to discharge working fluid at a flow rate obtained by adding the first required flow rate and the third required flow rate.