The invention relates to the technical field of hydraulic systems, and provides a closed hydraulic control system applied to a winch, a control method of the closed hydraulic control system and a crane, and the closed hydraulic control system applied to the winch is used for controlling a brake and comprises a closed pump; the hydraulic motor and the closed pump form a closed hydraulic system, and the hydraulic motor is provided with a high-pressure side channel and a low-pressure side channel; the hydraulic motor is used for controlling the winch to work; the oil supplementing pump is used for providing an oil source for the brake; the explosion-proof valve group comprises a hydraulic control reversing valve, an oil inlet of the hydraulic control reversing valve is communicated with the oil supplementing pump; when the hydraulic control reversing valve is at the first working position, the brake cavity is communicated with the oil supplementing pump; and at the second working position, the brake cavity is communicated with the oil tank. When a high-pressure side channel works normally, a first working position of a hydraulic control reversing valve works, a brake cavity communicates with an oil supplementing pump, and a brake is started; when the high-pressure side channel bursts, the C port of the hydraulic control reversing valve loses pressure, the second working position works, the pressure of the brake cavity is relieved quickly, the brake is closed, the winch is prevented from falling, and the structure is simple.

    本发明涉及液压系统技术领域,提供一种应用于卷扬的闭式液压控制系统及其控制方法和起重机,应用于卷扬的闭式液压控制系统用于控制制动器,包括闭式泵;液压马达,与闭式泵形成闭式液压系统,具有高压侧通道和低压侧通道;液压马达用于控制卷扬的工作;补油泵,用于为制动器提供油源;防爆阀组,包括:液控换向阀,其进油口与补油泵连通;液控换向阀在第一工作位时,制动腔与补油泵连通;在第二工作位时,制动腔与油箱连通。本发明当高压侧通道正常工作时,液控换向阀第一工作位工作,制动腔与补油泵连通,制动器开启;当高压侧通道发生爆裂时,液控换向阀的C口失压,第二工作位工作,制动腔迅速卸压,使制动器关闭,防止卷扬坠落,结构简单。


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    Title :

    Closed type hydraulic control system applied to winch, control method of closed type hydraulic control system and crane


    Additional title:

    应用于卷扬的闭式液压控制系统及其控制方法和起重机


    Contributors:
    ZONG ZHIFENG (author) / YU YANGHUA (author)

    Publication date :

    2024-02-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS



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