The invention discloses a valve back compensation load sensitive system, a hydraulic system and a crane, relates to the field of hydraulic pressure, and aims to save more energy. The working oil way of the downstream compensation load-sensitive system comprises a load-sensitive pump, a control valve, an actuating mechanism and a pressure compensator, the control valve is positioned between the load-sensitive pump and the actuating mechanism; the pressure compensator is disposed downstream of the control valve. The load-sensitive oil way comprises a pump variable displacement mechanism, a flow control valve and a throttling assembly. The pump variable displacement mechanism is connected with the control end of the load-sensitive pump, and the flow control valve is in fluid communication with the pump variable displacement mechanism; an oil inlet of the throttling assembly communicates with the pilot control end of the pressure compensator. The first overflow branch comprises a first reversing valve and a first overflow valve; the first overflow valve is located downstream of the first reversing valve. An oil inlet of the first reversing valve is in fluid communication with the control end of the flow control valve and an oil outlet of the throttling assembly. And an oil outlet of the first overflow valve is communicated with return oil. The system is very energy-saving and low in noise.
本发明公开了一种阀后补偿负载敏感系统、液压系统以及起重机,涉及液压领域,用以更加节能。该阀后补偿负载敏感系统的工作油路包括负载敏感泵、控制阀、执行机构和压力补偿器;控制阀位于负载敏感泵和执行机构之间;压力补偿器设置于控制阀的下游。负载敏感油路包括泵变量机构、流量控制阀和节流组件;泵变量机构与负载敏感泵的控制端连接,流量控制阀与泵变量机构流体连通;节流组件的进油口连通压力补偿器的先导控制端。第一溢流支路包括第一换向阀和第一溢流阀;第一溢流阀位于第一换向阀的下游。其中,第一换向阀的进油口与流量控制阀的控制端和节流组件的出油口流体连通;第一溢流阀的出油口连通回油。上述系统非常节能,且噪音小。
Valve rear compensation load sensitive system, hydraulic system and crane
阀后补偿负载敏感系统、液压系统以及起重机
2023-07-18
Patent
Electronic Resource
Chinese
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European Patent Office | 2016
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