The invention discloses a large-height overhead working truck leveling system and a control method.The system comprises a platform leveling subsystem, a hydraulic compensation subsystem and a PLC control subsystem, and the platform leveling subsystem comprises a crank arm, a leveling oil cylinder, a first connecting rod, a second connecting rod and a platform bracket; the hydraulic compensation subsystem comprises a balance valve, a leveling proportional valve, a one-way valve, a compensation proportional valve, an overflow valve and a compensation pump. The PLC control subsystem comprises a CAN communication module, a CPLD logic control module, a PWM driving module, a digital driving module, an angle sensor and a pressure sensor. A digital driving module is used for controlling a compensation pump, a PWM driving module is used for controlling a compensation proportional valve, and pressure adjustment is carried out; a PWM driving module is used for controlling a leveling proportional valve and a leveling platform; and the PWM driving module is used for adjusting the driving current of the proportional electromagnet of the leveling proportional valve. According to the invention, the pressure loss in the leveling pipeline can be compensated in real time, the pressure in the leveling pipeline is kept constant, and the response speed of the leveling system is improved.

    本发明公开了一种大高度高空作业车调平系统和控制方法,该系统包括平台调平子系统、液压补偿子系统和PLC控制子系统,平台调平子系统包括曲臂、调平油缸、第一连杆、第二连杆和平台托架,液压补偿子系统包括平衡阀、调平比例阀、单向阀、补偿比例阀、溢流阀和补偿泵,PLC控制子系统包括CAN通讯模块、CPLD逻辑控制模块、PWM驱动模块、数字驱动模块、角度传感器和压力传感器;利用数字驱动模块控制补偿泵以及PWM驱动模块控制补偿比例阀,进行压力调整;利用PWM驱动模块控制调平比例阀,调平平台;利用PWM驱动模块调节调平比例阀的比例电磁铁驱动电流。本发明可实时补偿调平管路中的压力损失,保持调平管路中的压力恒定,并提高调平系统的响应速度。


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    Title :

    Large-height overhead working truck leveling system and control method


    Additional title:

    一种大高度高空作业车调平系统和控制方法


    Contributors:
    LI KUN (author) / YANG ZHIQIANG (author) / LIU HANGYU (author) / LI HUIYANG (author)

    Publication date :

    2024-12-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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 / B66C Krane , CRANES



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