The invention relates to the field of hydraulic systems, and provides a brake valve group, a hydraulic brake system and engineering machinery, which comprise a valve body energy accumulator and a logic valve. The valve body is provided with a first oil inlet P1, a first oil return port T1 and a first working oil port. The energy accumulator is communicated with the first working oil port, the first oil inlet P1 and the first oil return port T1 at the same time. The logic valve is arranged between the energy accumulator and the first oil return port T1, a first pilot oil port PP2 is formed in the logic valve, and the first pilot oil port PP2 is communicated with the first oil inlet P1. When the brake valve set is applied to the hydraulic brake system and the hydraulic brake system is in a working state, hydraulic oil reaches the first pilot oil port PP2 through the first oil inlet P1, and the logic valve cuts off communication between the energy accumulator and the first oil return port T1. When the hydraulic braking system is in a non-working state, oil supply to the first oil inlet P1 is stopped, the logic valve conducts the energy accumulator and the first oil return port T1, the energy accumulator discharges oil to the first oil return port T1 through the logic valve, and pressure relief of the energy accumulator is achieved.

    本发明涉及液压系统领域,提供一种制动阀组、液压制动系统和工程机械,包括阀体蓄能器和逻辑阀。阀体上设置有第一进油口P1、第一回油口T1和第一工作油口。蓄能器同时与第一工作油口、第一进油口P1和第一回油口T1连通。逻辑阀设置在蓄能器与第一回油口T1之间,逻辑阀上设置有第一先导油口PP2,第一先导油口PP2与第一进油口P1连通。当该制动阀组应用到液压制动系统,且液压制动系统处于工作状态时,液压油经第一进油口P1到达第一先导油口PP2,逻辑阀切断蓄能器与第一回油口T1的连通。当液压制动系统处于非工作状态时,停止向第一进油口P1供油,逻辑阀导通蓄能器与第一回油口T1,蓄能器通过逻辑阀向第一回油口T1卸油,实现蓄能器泄压。


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    Title :

    Brake valve group, hydraulic brake system and engineering machinery


    Additional title:

    制动阀组、液压制动系统和工程机械


    Contributors:
    SONG KEJUN (author) / DENG HUI (author) / JIANG ZHENBO (author) / LIU XILIANG (author) / YANG YANG (author)

    Publication date :

    2023-07-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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