The invention relates to hydraulic equipment of engineering machinery, and provides a hydraulic control system, which comprises an oil inlet path, an oil return path, an oil discharge path, an oil inlet unit and a plurality of working units, a main valve core of each working unit comprises an oil inlet, an oil return port and two working oil ports respectively connected with an actuator, when the oil supply pressure of the actuator is lower than a set value, the actuator does not act, and when the oil supply pressure of the actuator is lower than a set value, the actuator does not act. Part or all of the working units are provided with control valves, the control valves are connected with main valve elements of the working units and the oil discharging oil ways, when the main valve elements of the working units move to enable one working oil port of the main valve element to be connected with the oil inlet, the control valves can be connected with the oil inlet, and under the condition that the main valve elements of the working units receive a neutral position control instruction, the control valves are connected with the oil discharging oil ways. The control valve can control the main valve element to communicate with the oil discharging oil way. According to the hydraulic control system, when the valve element is clamped and is not in the middle position, the clamped valve element is prevented from conveying hydraulic oil to the actuator, the actuator is prevented from generating uncontrollable actions, and the safety of the hydraulic system is improved. The invention further provides a high-altitude operation machine.
本发明涉及工程机械液压设备,提供一种液压控制系统,包括进油油路、回油油路、卸油油路、进油联和多个工作联,工作联的主阀芯包括进油口、回油口和分别连接执行器的两个工作油口,执行器的供油压力低于设定值时,执行器不动作,部分或全部工作联设置有控制阀,控制阀分别连接工作联的主阀芯和卸油油路,当工作联的主阀芯移动,以使主阀芯的一个工作油口连接进油口时,控制阀能够连接进油口,在工作联的主阀芯收到中位控制指令情况下,控制阀能够控制主阀芯连通卸油油路。本发明液压控制系统在阀芯卡滞不在中位时,避免卡滞的阀芯向执行器输送液压油,防止执行器产生不可控的动作,提高液压系统的安全性。本发明还提供一种高空作业机械。
Hydraulic control system and aerial work machine
液压控制系统和高空作业机械
2023-04-18
Patent
Elektronische Ressource
Chinesisch
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