The invention discloses a load sensitive system and an aerial work platform, relates to the field of hydraulic systems, and aims to improve the responsiveness of system output. The load-sensitive system comprises a load-sensitive variable pump which comprises an oil outlet. And the electric proportional overflow valve is connected with the load-sensitive variable pump. And the oil inlet path is communicated with an oil outlet of the load-sensitive variable pump. And the executing mechanism is arranged between the oil inlet path and the oil outlet path. The main reversing valve comprises an oil inlet and a load feedback port; and the main reversing valve is arranged among the oil inlet path, the oil outlet path and the actuating mechanism. And the downstream pressure compensator is communicated with the main reversing valve. And the Ls loading control valve is connected with the Ls oil way and the oil return oil way. The first pressure detection element detects the pressure of an oil inlet of the main reversing valve. The second pressure detection element detects the pressure of the load feedback port. The controller is electrically connected with the first pressure detection element, the second pressure detection element and the electric proportional overflow valve so as to control the opening degree of the electric proportional overflow valve according to the detected pressure difference value.
本发明公开了一种负载敏感系统以及高空作业平台,涉及液压系统领域,用以提升系统输出的响应性。该负载敏感系统包括:负载敏感变量泵,包括出油口。电比例溢流阀,与负载敏感变量泵连接。进油油路,与负载敏感变量泵的出油口连通。执行机构,设于进油油路和出油油路之间。主换向阀,包括进油口和负载反馈口;主换向阀设于进油油路、出油油路和执行机构之间。阀后压力补偿器,与主换向阀连通。Ls加载控制阀,与Ls油路及回油油路连接。第一压力检测元件检测主换向阀的进油口压力。第二压力检测元件检测负载反馈口的压力。控制器与第一、第二压力检测元件及电比例溢流阀均电连接,以根据检测到的压力的差值,控制电比例溢流阀的开度。
Load sensitive system and aerial work platform
负载敏感系统以及高空作业平台
2023-08-04
Patent
Electronic Resource
Chinese
IPC: | B66C Krane , CRANES / 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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