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 inlet unit and a plurality of working units, the oil inlet path is connected with the oil inlet unit and each working unit to supply oil, and the oil return path is connected with the oil inlet unit and each working unit to return oil. Two working oil ports of the main valve cores of part of or all the working units are respectively connected with an actuator through a working oil path so as to enable the actuator to supply oil and return oil, when the oil supply pressure of the actuator is lower than a set value, the actuator does not act, an unloading valve is arranged between the two working oil paths, and when the main valve cores of the working units receive a neutral position control instruction, the unloading valve is switched off. The unloading valve can control the two working oil ways of the working unit to be communicated with each other through the unloading valve. 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、进油联和多个工作联,进油油路连接进油联与各工作联以能够供油,回油油路连接进油联与各工作联以能够回油,部分或全部工作联的主阀芯的两个工作油口分别通过一条工作油路连接执行器,以能够使该执行器供油和回油,执行器的供油压力低于设定值时,该执行器不动作,两条工作油路之间设置有卸荷阀,当工作联的主阀芯收到中位控制指令时,卸荷阀能够控制工作联的两条工作油路通过该卸荷阀相互连通。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,提高了液压系统的安全性。本发明还提供一种高空作业机械。
Hydraulic control system and aerial work machine
液压控制系统及高空作业机械
2023-04-18
Patent
Electronic Resource
Chinese
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