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A platform for research: civil engineering, architecture and urbanism
Efficient and energy-saving engineering machinery hydraulic driving loop
The invention relates to an efficient and energy-saving engineering machinery hydraulic drive loop which comprises a first pressure compensation valve, a second pressure compensation valve, a constant power valve, a main pump, a spring, a variable piston large cavity end, a movable arm control valve, a rotation control valve and a flow channel. And a pressure relief flow channel is arranged on the rotary hydraulic loop and is unidirectionally led to the movable arm lifting hydraulic loop. A small pressure relief flow channel is arranged on the rotary hydraulic loop to lead to the movable arm lifting hydraulic loop, so that the pressure of the rotary hydraulic loop is reduced, the overflow loss of the rotary hydraulic loop is eliminated, and the situation that the displacement of the main pump is reduced due to the fact that the rotary pressure is too high under constant power control can be avoided; the output flow of the main pump and the working efficiency of the excavator are improved.
本发明是有关于一种高效节能的工程机械液压驱动回路，包括第一压力补偿阀、第二压力补偿阀、恒功率阀、主泵、弹簧、变量活塞大腔端，动臂控制阀、回转控制阀和流道，其中，回转控制阀通过阻尼、单向阀和流道连接动臂控制阀，在回转液压回路上设置泄压的流道单向通往动臂提升液压回路。本发明在回转液压回路上设置一个很小的泄压流道通往动臂提升液压回路，降低了回转液压回路的压力，既消除回转液压回路的溢流损失还可以避免主泵在恒功率控制下因回转压力过高而主泵被调小排量，提高主泵的输出流量和挖掘机的工作效率。
Efficient and energy-saving engineering machinery hydraulic driving loop
The invention relates to an efficient and energy-saving engineering machinery hydraulic drive loop which comprises a first pressure compensation valve, a second pressure compensation valve, a constant power valve, a main pump, a spring, a variable piston large cavity end, a movable arm control valve, a rotation control valve and a flow channel. And a pressure relief flow channel is arranged on the rotary hydraulic loop and is unidirectionally led to the movable arm lifting hydraulic loop. A small pressure relief flow channel is arranged on the rotary hydraulic loop to lead to the movable arm lifting hydraulic loop, so that the pressure of the rotary hydraulic loop is reduced, the overflow loss of the rotary hydraulic loop is eliminated, and the situation that the displacement of the main pump is reduced due to the fact that the rotary pressure is too high under constant power control can be avoided; the output flow of the main pump and the working efficiency of the excavator are improved.
本发明是有关于一种高效节能的工程机械液压驱动回路，包括第一压力补偿阀、第二压力补偿阀、恒功率阀、主泵、弹簧、变量活塞大腔端，动臂控制阀、回转控制阀和流道，其中，回转控制阀通过阻尼、单向阀和流道连接动臂控制阀，在回转液压回路上设置泄压的流道单向通往动臂提升液压回路。本发明在回转液压回路上设置一个很小的泄压流道通往动臂提升液压回路，降低了回转液压回路的压力，既消除回转液压回路的溢流损失还可以避免主泵在恒功率控制下因回转压力过高而主泵被调小排量，提高主泵的输出流量和挖掘机的工作效率。
Efficient and energy-saving engineering machinery hydraulic driving loop
一种高效节能的工程机械液压驱动回路
YANG XIAODONG (author) / LIAN HAICHEN (author) / ZHANG SHUAI (author) / ZHOU LIQIN (author) / ZHAO KAO (author) / DOU JIANPEI (author) / LIU BAIQING (author) / PAN WEI (author) / ZHANG FAN (author) / GUO LI (author)
2023-10-20
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING
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