An energy regeneration type forklift hydraulic system is provided, the system comprising a first oil pump (2), a first electrical motor (3), a multi-way valve (4), a lifting oil cylinder (10), a tilting oil cylinder (11), a steering oil cylinder (12), a load-sensing steering device (13), an oil filter (18), a second oil pump (19) and an oil tank (22), wherein the multi-way valve (4) consists of an oil inlet/return valve plate (5), a raising/lowering reversing valve plate (6), a tilting reversing valve plate (7) and an oil in-let valve plate (8). A check valve (51) and a main safety valve (52) are arranged inside the oil inlet/return valve plate (5); the raising/lowering reversing valve plate (6) comprises a lifting three-position six-way reversing valve, a circular oil return duct (15) and an oil return duct (16). The tilting reversing valve plate (7) comprises a tilting three-position six-way reversing valve, a first overload oil supplement valve (72) and a second overload oil supplement valve (73). The oil inlet valve plate (8) comprises a bypass valve (81), a priority valve (83) and a steering safety valve (82). The system can utilize the potential energy of dropping cargo to simultaneously drive two oil pumps (2, 19) for driving two motors (3, 20) to generate energy, thereby realizing energy recovery, or one part of the potential energy is converted into hydraulic energy by one oil pump (19) and surplus differential pressure also can be used for power regeneration, while the other part is used by another oil pump (2) to drive the motor (3) for generating energy, so that energy recovery is realized.


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    Title :

    ENERGY REGENERATION TYPE FORKLIFT HYDRAULIC SYSTEM


    Additional title:

    GABELSTAPLER-HYDRAULIKSYSTEM MIT ENERGIERÜCKGEWINNUNG
    SYSTÈME HYDRAULIQUE DE CHARIOT ÉLÉVATEUR À FOURCHE DU TYPE À RÉGÉNÉRATION D'ÉNERGIE


    Contributors:
    MA QINGFENG (author) / WEN YUEQING (author) / TIAN YUAN (author) / ZHANG LI (author) / ZHOU QIQI (author) / WU TIANFU (author)

    Publication date :

    2016-12-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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 / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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