A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Loading machine fixed variable hydraulic system directly controlled on basis of load signals
The invention relates to the engineering machine hydraulic technology, in particular to a loading machine fixed variable hydraulic system directly controlled on the basis of load signals. A flow control valve block is included and communicates with a variable pump, a flow amplification valve, a multi-way valve, an unloading valve and the variable pump. The flow amplification valve is connected with a steering device, and a piloted constant-pressure valve block is connected with the steering device, a piloted valve and the variable pump. The piloted valve is connected with the multi-way valve,the multi-way valve is connected with a rotating bucket cylinder and a movable arm cylinder, and an outlet of a metering pump is connected with the multi-way valve after being connected with the flowcontrol valve through the unloading valve. The multi-way valve is a load sensitive valve, a signal channel is integrated and directly communicates with a work valve, work signals are collected, and the control logic of the loading machine fixed variable hydraulic system is simple. Through a three-way pressure compensation device, it is guaranteed that the inlet and outlet pressure difference of the multi-way valve is constant, constant-flow output irrelevant to the loads is achieved, the variable pump can achieve displacement changing under all work conditions, the advantages of the variable pump are brought into full play, and the integral structure of the system is relatively simple.
本发明涉及工程机械液压技术，尤其涉及一种基于负载信号直接控制的装载机定变量液压系统，包括有流量控制阀块，流量控制阀块连通变量泵、流量放大阀、多路阀、卸荷阀、变量泵；流量放大阀与转向器相连，先导恒压阀块与转向器、先导阀、变量泵相连；先导阀与多路阀相连，多路阀与转斗缸、动臂缸相连，定量泵的出口经卸荷阀与流量控制阀接通后与多路阀相连。本发明多路阀为负载敏感阀，集成了信号通道直接连通工作阀，采集工作信号，其控制逻辑简单。本发明三通压力补偿器保证多路阀进出口压差的恒定，实现与负载无关的恒流量输出，本发明变量泵可以全工况变排量，充分发挥变量泵的优势，且系统整体结构相对简单。
Loading machine fixed variable hydraulic system directly controlled on basis of load signals
The invention relates to the engineering machine hydraulic technology, in particular to a loading machine fixed variable hydraulic system directly controlled on the basis of load signals. A flow control valve block is included and communicates with a variable pump, a flow amplification valve, a multi-way valve, an unloading valve and the variable pump. The flow amplification valve is connected with a steering device, and a piloted constant-pressure valve block is connected with the steering device, a piloted valve and the variable pump. The piloted valve is connected with the multi-way valve,the multi-way valve is connected with a rotating bucket cylinder and a movable arm cylinder, and an outlet of a metering pump is connected with the multi-way valve after being connected with the flowcontrol valve through the unloading valve. The multi-way valve is a load sensitive valve, a signal channel is integrated and directly communicates with a work valve, work signals are collected, and the control logic of the loading machine fixed variable hydraulic system is simple. Through a three-way pressure compensation device, it is guaranteed that the inlet and outlet pressure difference of the multi-way valve is constant, constant-flow output irrelevant to the loads is achieved, the variable pump can achieve displacement changing under all work conditions, the advantages of the variable pump are brought into full play, and the integral structure of the system is relatively simple.
本发明涉及工程机械液压技术，尤其涉及一种基于负载信号直接控制的装载机定变量液压系统，包括有流量控制阀块，流量控制阀块连通变量泵、流量放大阀、多路阀、卸荷阀、变量泵；流量放大阀与转向器相连，先导恒压阀块与转向器、先导阀、变量泵相连；先导阀与多路阀相连，多路阀与转斗缸、动臂缸相连，定量泵的出口经卸荷阀与流量控制阀接通后与多路阀相连。本发明多路阀为负载敏感阀，集成了信号通道直接连通工作阀，采集工作信号，其控制逻辑简单。本发明三通压力补偿器保证多路阀进出口压差的恒定，实现与负载无关的恒流量输出，本发明变量泵可以全工况变排量，充分发挥变量泵的优势，且系统整体结构相对简单。
Loading machine fixed variable hydraulic system directly controlled on basis of load signals
一种基于负载信号直接控制的装载机定变量液压系统
CAI ZHENG (author) / FENG YIJIANG (author) / PAN CUNQIAN (author) / XU ZIMING (author) / YANG YONGCHENG (author) / ZHOU JIAN (author) / JIANG JIANXING (author)
2020-06-09
Patent
Electronic Resource
Chinese
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