A control method for controlling retraction of a boom, a system, a mechanical device, and a storage medium, the control method for controlling retraction of the boom being applied to a hydraulic system that may combine self-weight retraction and pressure retraction of the boom. The hydraulic system comprises: a pressure retraction motor (7), a pressure retraction proportional valve (6) and a self-weight retraction proportional valve (3) which are placed in communication in sequence; a rodless cavity of the boom is in communication with the self-weight retraction proportional valve (3), and a rod cavity of the boom is in communication with the pressure retraction motor (7) and the pressure retraction proportional valve (6). The control method comprises: when the boom is retracted, controlling the self-weight retraction proportional valve (3) to be at a maximum opening; acquiring an actual speed of the boom during retraction; when the actual speed is less than a preset speed, controlling a rotation speed of the pressure retraction motor (7) to be increased or an opening degree of the pressure retraction proportional valve to be increased; and when the actual speed is greater than the preset speed, controlling the rotation speed of the pressure retraction motor (7) to be reduced or the opening degree of the pressure retraction proportional valve to be reduced.


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    Title :

    CONTROL METHOD FOR CONTROLLING RETRACTION OF BOOM, SYSTEM, MECHANICAL DEVICE AND STORAGE MEDIUM


    Contributors:
    ZOU JUNHUI (author) / LIU GUOLIANG (author) / SHI WEI (author)

    Publication date :

    2024-07-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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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