The invention discloses a prefill valve, a hydraulic steering brake system and an engineering vehicle, the prefill valve comprises a priority valve and a pilot unloading valve, an LS1 port of the priority valve is connected with a P port of the pilot unloading valve, a second one-way valve and a pressure maintaining device are sequentially arranged on a passage from a CF port of the priority valve to an A port of the prefill valve, and the pressure maintaining device adopts a valve for controlling one-way flow of oil; a pilot oil way is led out between the second one-way valve and the pressure maintaining device and is connected to a pilot oil port of the pilot unloading valve; the hydraulic steering brake system comprises an energy accumulator, a steering gear and the prefill valve, a port A of the prefill valve is connected with the energy accumulator, and a port CF of the priority valve is connected with a port P of the steering gear; an LS port of the pilot unloading valve is connected with an LS port of the steering gear; the hydraulic steering brake system is applied to the engineering vehicle. The prefill valve is simple in structure, low in cost and good in pressure maintaining capacity; the provided hydraulic steering brake system is simple in structure, high in system integration degree and small in system pressure loss.
本发明公开了一种充液阀、液压转向制动系统及工程车辆,充液阀包括优先阀和先导卸荷阀,优先阀LS1口连接先导卸荷阀P口,优先阀CF口至充液阀A口的通路上顺序设置有第二单向阀和保压装置,保压装置采用控制油液单向流动的阀件;在第二单向阀和保压装置之间引出先导油路,连接至先导卸荷阀先导油口;所述液压转向制动系统包括蓄能器、转向器和所述充液阀,充液阀A口连接蓄能器,优先阀CF口连接转向器P口;先导卸荷阀LS口连接转向器LS口;所述工程车辆应用所述液压转向制动系统。本发明提供的充液阀结构简单,成本低,保压能力好;提供的液压转向制动系统结构简单,系统集成度高,系统压力损失小。
Prefill valve, hydraulic steering brake system and engineering vehicle
一种充液阀、液压转向制动系统及工程车辆
2023-09-22
Patent
Elektronische Ressource
Chinesisch
Brake valve group, hydraulic brake system and engineering machinery
Europäisches Patentamt | 2023
|Europäisches Patentamt | 2023
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