The embodiment of the invention provides a steering system and engineering machinery. The steering system comprises an oil tank; the steering gear pump is connected with the oil tank; the priority valve is connected with the steering gear pump; a first steering cylinder; a second steering cylinder; the full-hydraulic steering gear is connected with the priority valve and the oil tank, connected with the first steering oil cylinder through a first liquid path and connected with the second steering oil cylinder through a second liquid path; the emergency pump is connected with the oil tank and the priority valve; and the overload protection safety valve is arranged on the first liquid path and/or the second liquid path. According to the technical scheme, the emergency pump is additionally arranged, when the engine is shut down due to faults or the steering gear pump loses efficacy, the emergency pump can provide an emergency steering function for the steering system, and the engineering machinery can stop smoothly. The steering system is simple in structure, convenient to maintain and low in cost. In addition, the overload protection safety valve is additionally arranged between the full-hydraulic steering gear and the steering oil cylinder, so that the function of protecting the steering oil cylinder can be achieved when the load impact is too large.

    本发明的实施例提供了一种转向系统和工程机械,其中转向系统包括:油箱;转向齿轮泵,与油箱连接;优先阀,与转向齿轮泵连接;第一转向油缸;第二转向油缸;全液压转向器,与优先阀、油箱连接,与第一转向油缸通过第一液路连接,与第二转向油缸通过第二液路连接;应急泵,与油箱、优先阀连接;过载保护安全阀,设于第一液路和/或第二液路。本发明的技术方案中,增设应急泵,当发动机故障熄火或者转向齿轮泵失效时,应急泵能够为转向系统提供应急转向功能,使工程机械顺利地停靠。转向系统结构简单、便于维护保养且成本较低。另外,通过在全液压转向器与转向油缸之间增设过载保护安全阀,当负载冲击过大时可以起到保护转向油缸的作用。


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    Title :

    Steering system and engineering machinery


    Additional title:

    转向系统和工程机械


    Contributors:

    Publication date :

    2022-05-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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