The invention discloses an electric proportional control hydraulic system. The electric proportional control hydraulic system comprises an oil pump, a plurality of oil cylinders and a multi-way valve for controlling the oil cylinders to stretch out and draw back, wherein the multi-way valve is connected with the oil pump and the oil cylinders, and the multi-way valve comprises a plurality of hydraulic control proportional reversing valves corresponding to the oil cylinders correspondingly, hydraulic control ports in the two ends of each hydraulic control proportional reversing valve are connected with the oil pump through corresponding electromagnetic proportional reversing valves. In the working process, the oil pump inputs hydraulic oil into the multi-way valve and the electromagnetic proportional directional valves at the same time, the output quantity of the hydraulic oil is proportionally adjusted through the electromagnetic proportional reversing valves, pilot control is achieved by proportionally outputting the hydraulic oil to hydraulic control ports of the hydraulic control proportional reversing valves, and then the hydraulic control proportional reversing valves move proportionally, so that finally all the oil cylinders stretch out and draw back proportionally, the amplitude and the speed of the action of a forklift can be adjusted according to actual working conditions, so that the action of the forklift is adjustable.

    本发明公开一种电比例操纵液压系统,包括油泵、多个油缸和控制油缸伸缩的多路阀,多路阀连接油泵和油缸,多路阀包括分别对应各油缸的多个液控比例换向阀,每个液控比例换向阀的两端的液控口均通过单独对应的电磁比例换向阀连接油泵。工作过程中油泵将液压油输入多路阀,同时输入电磁比例换向阀,由电磁比例换向阀比例调节液压油输出量,向液控比例换向阀的液控口比例输出实现先导控制,进而液控比例换向阀比例运动,最终使各油缸比例伸缩,能够根据实际工况来调整叉车动作的幅度和速度,使叉车动作具有可调性。


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    Title :

    Electric proportional control hydraulic system


    Additional title:

    一种电比例操纵液压系统


    Contributors:
    LI JING (author) / WANG JIANCHAO (author) / JIN YINGCHAO (author) / YOU YINGJIE (author) / SONG TAO (author) / FU QI (author)

    Publication date :

    2021-06-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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