The invention relates to a steering valve of a double-power-flow steering system, a steering system and an engineering vehicle, and the steering valve of the double-power-flow steering system comprises an inlet used for ingress of hydraulic fluid; a first working port used for outputting hydraulic fluid; a second working port used for outputting hydraulic fluid; a pressure reducing valve that comprises a pressure reducing valve shell, a pressure reducing valve inlet formed in the pressure reducing valve shell and communicated with the inlet, a pressure reducing valve outlet for outputting the hydraulic fluid subjected to pressure reduction, a valve element movably arranged in the pressure reducing valve shell, and an elastic component configured to push and press the valve element in the first direction; a rotating shaft assembly that comprises a rotating shaft capable of being driven by the steering wheel to rotate and a cam installed on the rotating shaft to rotate along with the rotating shaft, and a protruding part of the cam is configured to push and press the valve element in the second direction so that the pressure reducing valve inlet and the pressure reducing valve outlet can be communicated; and a fluid distribution part that comprises a fluid distribution part shell and a flow distribution disc rotatably arranged in the flow distribution part shell, wherein the fluid distribution disc is provided with a channel used for communicating one of the first working opening and the second working opening with an outlet of the pressure reducing valve, and the fluid distribution disc is installed on the rotating shaft; so that first working port communicates with the outlet of the pressure reducing valve in the first state, and the second working port communicates with the outlet of the pressure reducing valve in the second state.

    本发明涉及一种双功率流转向系统的转向阀、转向系统和工程车辆,双功率流转向系统的转向阀包括:进口,用于引入液压流体;第一工作口,用于输出液压流体;第二工作口,用于输出液压流体;减压阀,包括减压阀壳体、设在减压阀壳体上并与进口连通的减压阀进口、输出减压后的液压流体的减压阀出口、可移动地设在减压阀壳体内的阀芯、被配置成将阀芯朝第一方向推压的弹性部件;转轴组件,包括可在方向盘的带动下转动的转轴、安装在转轴上以随转轴转动的凸轮,凸轮的凸出部被配置成将阀芯朝第二方向推压,以使减压阀进口和减压阀出口导通;配流部,包括配流部壳体、可转动地设在配流部壳体内的配流盘,配流盘设有用于连通第一工作口和第二工作口中的一个以及减压阀的出口的通道,配流盘安装在转轴上,以在随转轴转动的过程中在连通第一工作口和减压阀的出口的第一状态和连通第二工作口和减压阀的出口的第二状态之间切换。


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    Title :

    Steering valve of double-power-flow steering system, steering system and engineering vehicle


    Additional title:

    双功率流转向系统的转向阀、转向系统和工程车辆


    Contributors:
    GUO ZHENHUA (author) / XU JINGKE (author) / MENG XIANGWEI (author)

    Publication date :

    2022-02-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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