The invention relates to the field of engineering machinery, and discloses a counterweight hydraulic system and a crane, the counterweight hydraulic system comprises a first counterweight oil cylinder, a second counterweight oil cylinder and a balance oil path, the balance oil path is respectively connected with a first rod cavity oil path of the first counterweight oil cylinder and a second rod cavity oil path of the second counterweight oil cylinder, and one of the first rod cavity oil way and the second rod cavity oil way, which is lower in oil pressure, is communicated to discharge oil. In the lifting process of the first counterweight oil cylinder and the second counterweight oil cylinder, the balance oil way can discharge part of hydraulic oil input into the counterweight oil cylinder with the small load, so that the oil inlet flow of rod cavities of the first counterweight oil cylinder and the second counterweight oil cylinder is consistent, synchronization errors caused by compensation characteristics are effectively reduced, and the service life of the counterweight oil cylinder is prolonged. And the synchronization precision can meet the requirement.

    本发明涉及工程机械领域,公开了一种配重液压系统和起重机,配重液压系统包括第一配重油缸、第二配重油缸以及平衡油路,平衡油路分别与第一配重油缸的第一有杆腔油路和第二配重油缸的第二有杆腔油路相连接,并用于与第一有杆腔油路和第二有杆腔油路中油压较低的一者导通以排油。本发明在第一配重油缸和第二配重油缸提升的过程中,平衡油路能够将输入至负载较小的配重油缸的液压油部分排出,从而使得第一配重油缸和第二配重油缸的有杆腔进油流量相一致,有效降低由于补偿特性所导致的同步误差,使得同步精度能够满足要求。


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    Titel :

    Counterweight hydraulic system and crane


    Weitere Titelangaben:

    配重液压系统和起重机


    Beteiligte:
    SONG JIANQING (Autor:in) / HE WEI (Autor:in) / ZHOU QINGXI (Autor:in) / SHEN CHANGWU (Autor:in) / LIU YONGLIANG (Autor:in)

    Erscheinungsdatum :

    2022-10-11


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B66C Krane , CRANES / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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