Variable displacement pump with flow delivery to different systems with different pressure schedules

    公开(公告)号:US11994078B1

    公开(公告)日:2024-05-28

    申请号:US18074782

    申请日:2022-12-05

    CPC classification number: F02C9/30 F16K31/046 F04C2270/18 F04C2270/585

    Abstract: A system includes a variable displacement pump (VDP) with a pump inlet and a pump outlet. The VDP is configured to receive a flow at the pump inlet at a first pressure and to outlet a flow from the pump outlet at a second pressure elevated relative to the first pressure. The VDP includes a variable displacement mechanism configured to vary the second pressure. A controller is operatively connected to a pressure sensor and to the variable displacement mechanism for control of the VDP. An output splitter is configured to split flow from the pump outlet to a first outlet branch and to a second outlet branch for supplying two different systems each having a different pressure schedule. The output splitter is operatively connected to the controller, which is configured to control the output splitter to regulate pressure in both of the first and second outlet branches.

    HYDRAULIC VALVE MODULE FOR SAFE DEACTIVATION IN THE CASE OF FAILURE OF AN EXTERNAL CURRENT SUPPLY, AND METHOD FOR OPERATING A HYDRAULIC VALVE

    公开(公告)号:US20230167918A1

    公开(公告)日:2023-06-01

    申请号:US17910954

    申请日:2021-03-02

    CPC classification number: F16K31/046

    Abstract: Techniques involve a hydraulic valve module having at least one hydraulic valve with a valve slide which can be adjusted by way of an electric actuator in order to supply hydraulic lines with hydraulic liquid by way of the hydraulic valve. The hydraulic valve module has a controller and an electric energy store. The controller and the electric energy store are set up to move the valve slide out of every possible valve slide position into a deactivation position by way of the electric actuator and energy which is stored in the electric energy store. This allows the safe operation of hydraulic valves without a restoring spring, wherein valves of this type and the actuators thereof can be of smaller and less expensive construction than in the case of conventional valves with a restoring spring.

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