The invention discloses a hydraulic system of a telescopic boom, the telescopic boom and an engineering vehicle. The hydraulic system comprises a first oil way, multi-stage telescopic cylinders, a second oil way, a balance valve, a second one-way valve, a throttling valve, a third oil way and a control oil way; rodless cavities of the telescopic cylinders are communicated with the first oil way, and synchronous oil inlet or oil return is conducted on the rodless cavities of the telescopic cylinders through the first oil way; rod cavities of the telescopic cylinders communicate with the secondoil way, and synchronous oil inlet or oil return is conducted on the rod cavities of the telescopic cylinders through the second oil way; the balance valve is arranged on the first oil way, and the control oil way communicates with the control end of the balance valve and the second oil way; and the third oil way is connected between the first oil way and the second oil way, the second one-way valve and the throttling valve are arranged on the third oil way, the throttling valve is arranged on the oil outlet side of the second one-way valve, and oil in the third oil way can flow to the first oil way through the second one-way valve. According to the hydraulic system of the telescopic boom, the telescopic boom and the engineering vehicle, shaking can be effectively reduced.

    本申请公开了伸缩臂架的液压系统、伸缩臂架以及工程车辆,包括第一油路、多级伸缩缸、第二油路、平衡阀、第二单向阀、节流阀、第三油路以及控制油路;多个伸缩缸的无杆腔与第一油路连通,多个伸缩缸的无杆腔通过第一油路同步进油或回油;多个伸缩缸的有杆腔与第二油路连通,多个伸缩缸的有杆腔通过第二油路同步进油或回油;平衡阀设置在第一油路上,控制油路连通平衡阀的控制端与第二油路;第三油路连接于第一油路与第二油路之间,第二单向阀与节流阀均设置在第三油路上,节流阀设置在第二单向阀的出油侧,第三油路中的油液能够经过第二单向阀流向第一油路。本申请的伸缩臂架的液压系统、伸缩臂架以及工程车辆,可有效减少抖动。


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    Title :

    Hydraulic system of telescopic boom, telescopic boom and engineering vehicle


    Additional title:

    伸缩臂架的液压系统、伸缩臂架以及工程车辆


    Contributors:
    QING LICHUN (author) / GUO FANGYUN (author) / LI HONGSHU (author) / CHEN GUOPING (author)

    Publication date :

    2020-10-30


    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 / B66C Krane , CRANES / 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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