现代化拖拉机负荷传感液压系统

Modern Tractor Load Sensor Hydraulic System

负荷传感液压系统不受负载变化的影响,可以实现按需供油,系统没有多余流量,具有高效、节能的特点。现代化拖拉机的液压悬挂、液压输出、挂车制动、液压转向系统为负荷传感系统,系统中梭阀网络接受负载的传感信号,对负荷传感液压泵进行控制,获得了泵的3种工作模式。泵控负荷传感多路阀系统设置压力补偿器,保证各回路有良好的流量控制性能。文中分别对此进行了分析研究,为国产大中型拖拉机液压系统的换代升级,提供有意义的参考。

Load sensing hydraulic system is not affected by load change,it can supply oil on demand,the system has no excess flow,and has the characteristics of high efficiency and energy saving.The hydraulic suspension,hydraulic output,trailer brake and hydraulic steering system of modern tractors are load sensing systems.The shuttle valve network in the system receives the sensing signal of the load,controls the load sensing hydraulic pump,and obtains three working modes of the pump.The pump-controlled load sensing multi-way valve system is equipped with pressure compensator to ensure good flow control performance.In this paper,the author analyzes and studies these issues,and provides a new generation and upgrade for the hydraulic system of large and medium-sized domestic tractors.