The invention discloses a steering hydraulic system of an engineering vehicle and the engineering vehicle. The steering hydraulic system comprises a hydraulic pump, a steering locking oil cylinder andan energy accumulator; the steering locking oil cylinder comprises a cylinder body and a piston rod assembly, the piston rod assembly comprises a piston rod, a first piston and a second piston, the first piston and the second piston are arranged on the piston rod, the first piston is located in a first cavity and divides the first cavity into two locking cavities, and the two locking cavities communicate with each other; the second piston is located in a second cavity and divides the second cavity into a left steering cavity and a right steering cavity, and in the locking state, the two locking cavities are filled with oil, and the left steering cavity and the right steering cavity are unloaded; and in the steering state, the two locking cavities are unloaded, the hydraulic pump suppliesoil to one of the left steering cavity and the right steering cavity, and an oil port of the energy accumulator communicates with the locking cavities. The energy accumulator can play a role in maintaining the oil pressure of the locking cavities, the hydraulic pump does not need to continuously work to supply oil to the locking cavities at high pressure, and thus energy consumption can be reduced.

    本发明公开了一种工程车辆的转向液压系统和工程车辆。转向液压系统包括液压泵、转向锁止油缸和蓄能器,转向锁止油缸包括缸体和活塞杆组件,活塞杆组件包括活塞杆和设于活塞杆上的第一活塞和第二活塞,第一活塞位于第一腔内并将第一腔分隔为两个锁止腔,两个锁止腔相互连通,第二活塞位于第二腔内并将第二腔分隔为左转向腔和右转向腔,在锁止状态,两个锁止腔充油且左转向腔和右转向腔卸荷;在转向状态,两个锁止腔卸荷且液压泵为左转向腔和右转向腔中的一个供油,蓄能器的油口与锁止腔连通。本发明的蓄能器可为锁止腔的油压起到保压的作用,而无需液压泵持续工作来对锁止腔进行高压供油,因此可节约能耗。


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    Title :

    Steering hydraulic system of engineering vehicle and engineering vehicle


    Additional title:

    工程车辆的转向液压系统和工程车辆


    Contributors:
    ZHANG SHUJIE (author) / LU ZHEN (author) / HU JIANFENG (author)

    Publication date :

    2021-01-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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