The invention belongs to the field of engineering machinery, and particularly relates to a positive flow hydraulic system based on a load-sensitive electric control pump, which comprises a steering cylinder, a steering gear for controlling the action of the steering cylinder, a working cylinder and a multi-way valve for controlling the action of the working cylinder, the load-sensitive electric control pump and the electric control pump are both communicated with the hydraulic oil tank, the priority valve comprises a first working position, a second working position and a control oil way, and the control oil way of the priority valve is used for switching the valve position of the priority valve; an oil inlet of the steering gear is connected with a steering oil port of the priority valve, and the oil inlet of the steering gear is in fluid communication with the load-sensitive electric control pump through the priority valve located at the first working position. And an oil inlet of the multi-way valve is connected with a working oil port of the priority valve, and the oil inlet of the multi-way valve is in fluid communication with the load-sensitive electric control pump through the priority valve located at the second working position. By introducing the load-sensitive electric control pump, the flow of the steering pump is controlled, the flow loss can be greatly reduced, and a better energy-saving effect is achieved.
本发明属于工程机械领域,具体涉及一种基于负载敏感电控泵的正流量液压系统,包括转向缸、用于控制转向缸动作的转向器、工作缸以及用于控制工作缸动作的多路阀,还包括换向阀、优先阀以及均与液压油箱连通的负载敏感电控泵和电控泵,优先阀包括第一工作位、第二工作位和控制油路,优先阀的控制油路用于切换优先阀的阀位;转向器的进油口与优先阀的转向油口连接,转向器的进油口通过处于第一工作位的优先阀与负载敏感电控泵流体连通;多路阀的进油口与优先阀的工作油口连接,多路阀的进油口通过处于第二工作位的优先阀与负载敏感电控泵流体连通。本发明通过引入负载敏感电控泵使得转向泵的流量得到控制,可大幅降低流量损耗,达到较好的节能效果。
Positive flow hydraulic system based on load-sensitive electric control pump
基于负载敏感电控泵的正流量液压系统
2024-01-16
Patent
Electronic Resource
Chinese
Load-sensitive pump system, hydraulic control system and engineering machinery
European Patent Office | 2021
|Double-variable-pump load-sensitive feedback hydraulic system
European Patent Office | 2021
|European Patent Office | 2024
|Load-sensitive hydraulic control valve bank, tractor hydraulic system and tractor
European Patent Office | 2025
|