Hydraulic system having low speed operation
    1.
    发明授权
    Hydraulic system having low speed operation 有权
    液压系统低速运行

    公开(公告)号:US09366272B2

    公开(公告)日:2016-06-14

    申请号:US13963150

    申请日:2013-08-09

    申请人: Caterpillar Inc.

    摘要: A hydraulic fan circuit is provided. The hydraulic fan circuit includes a tank, a motor having a fluid inlet and a fluid outlet and a pump to draw fluid at a low pressure from the tank and discharge the fluid at elevated pressures to the motor via the fluid inlet. The hydraulic fan circuit further includes a directional control valve disposed between the fluid outlet of the motor and the tank. The directional control valve is operable to move between a flow blocking position and a flow passing position. Further, the directional control valve is configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. Furthermore, the hydraulic fan circuit includes a pressure control circuit configured to provide a pilot fluid flow at varying pressure to move the directional control valve.

    摘要翻译: 提供液压风扇电路。 液压风扇回路包括油箱,具有流体入口和流体出口的马达和用于从罐中抽取低压的流体并经由流体入口将流体以升高的压力排出到马达的泵。 液压风扇回路还包括设置在电动机的流体出口和罐之间的方向控制阀。 方向控制阀可操作以在阻流位置和流动通过位置之间移动。 此外,方向控制阀被配置为将电动机的正转速降低到通过控制泵输出可获得的最低正向速度。 此外,液压风扇回路包括压力控制回路,该压力控制回路构造成在变化的压力下提供先导流体流动以移动方向控制阀。

    HYDRAULIC SYSTEM HAVING LOW SPEED OPERATION
    2.
    发明申请
    HYDRAULIC SYSTEM HAVING LOW SPEED OPERATION 有权
    具有低速运行的液压系统

    公开(公告)号:US20150040548A1

    公开(公告)日:2015-02-12

    申请号:US13963150

    申请日:2013-08-09

    申请人: Caterpillar Inc.

    IPC分类号: F15B15/02

    摘要: A hydraulic fan circuit is provided. The hydraulic fan circuit includes a tank, a motor having a fluid inlet and a fluid outlet and a pump to draw fluid at a low pressure from the tank and discharge the fluid at elevated pressures to the motor via the fluid inlet. The hydraulic fan circuit further includes a directional control valve disposed between the fluid outlet of the motor and the tank. The directional control valve is operable to move between a flow blocking position and a flow passing position. Further, the directional control valve is configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. Furthermore, the hydraulic fan circuit includes a pressure control circuit configured to provide a pilot fluid flow at varying pressure to move the directional control valve.

    摘要翻译: 提供液压风扇电路。 液压风扇回路包括油箱,具有流体入口和流体出口的马达和用于从罐中抽取低压的流体并经由流体入口将流体以升高的压力排出到马达的泵。 液压风扇回路还包括设置在电动机的流体出口和罐之间的方向控制阀。 方向控制阀可操作以在阻流位置和流动通过位置之间移动。 此外,方向控制阀被配置为将电动机的正转速降低到通过控制泵输出可获得的最低正向速度。 此外,液压风扇回路包括压力控制回路,该压力控制回路构造成在变化的压力下提供先导流体流动以移动方向控制阀。