A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fixed and variable hydraulic system of loading machine and loading machine
The invention relates to the technical field of loaders, in particular to a loader constant-volume and variable-volume hydraulic system and a loader.The constant-volume and variable-volume hydraulic system comprises a variable steering pump, a quantitative working pump, a priority valve, a distribution valve and a controller; an oil outlet of the metering pump is communicated with a first branch and a second branch, the first branch is communicated with the low-pressure unloading valve, and the second branch is communicated with an oil inlet of the first main control valve; an oil outlet of the variable steering pump is communicated with an oil inlet of the steering gear and an oil inlet of the priority valve, a CF oil outlet of the priority valve is communicated with an oil inlet of the flow amplification valve, an EF oil outlet of the priority valve is communicated with a third branch and a fourth branch, the third branch is communicated with an oil inlet of the second main control valve, and the fourth branch can be communicated with the second branch. According to the constant and variable hydraulic system provided by the invention, the variable steering pump can play a role in variable adjustment under all working conditions, so that the adjusting and energy-saving effects of the variable steering pump are fully played, and the energy-saving effect of the constant and variable hydraulic system is further improved.
本发明涉及装载机技术领域，尤其涉及一种装载机定变量液压系统及装载机，定变量液压系统包括变量转向泵、定量工作泵、优先阀、分配阀以及控制器；定量泵的出油口连通有第一支路和第二支路，第一支路与低压卸荷阀连通，第二支路与第一主控阀的进油口连通；变量转向泵的出油口与转向器的进油口以及优先阀的进油口连通，优先阀的CF出油口与流量放大阀的进油口连通，优先阀的EF出油口连通有第三支路和第四支路，第三支路与第二主控阀的进油口连通，第四支路能够与第二支路连通。本发明提供的定变量液压系统，能够实现变量转向泵在全工况下起到变量调节的作用，从而充分发挥了变量转向泵的调节节能效果，进而提高了定变量液压系统的节能效果。
Fixed and variable hydraulic system of loading machine and loading machine
The invention relates to the technical field of loaders, in particular to a loader constant-volume and variable-volume hydraulic system and a loader.The constant-volume and variable-volume hydraulic system comprises a variable steering pump, a quantitative working pump, a priority valve, a distribution valve and a controller; an oil outlet of the metering pump is communicated with a first branch and a second branch, the first branch is communicated with the low-pressure unloading valve, and the second branch is communicated with an oil inlet of the first main control valve; an oil outlet of the variable steering pump is communicated with an oil inlet of the steering gear and an oil inlet of the priority valve, a CF oil outlet of the priority valve is communicated with an oil inlet of the flow amplification valve, an EF oil outlet of the priority valve is communicated with a third branch and a fourth branch, the third branch is communicated with an oil inlet of the second main control valve, and the fourth branch can be communicated with the second branch. According to the constant and variable hydraulic system provided by the invention, the variable steering pump can play a role in variable adjustment under all working conditions, so that the adjusting and energy-saving effects of the variable steering pump are fully played, and the energy-saving effect of the constant and variable hydraulic system is further improved.
本发明涉及装载机技术领域，尤其涉及一种装载机定变量液压系统及装载机，定变量液压系统包括变量转向泵、定量工作泵、优先阀、分配阀以及控制器；定量泵的出油口连通有第一支路和第二支路，第一支路与低压卸荷阀连通，第二支路与第一主控阀的进油口连通；变量转向泵的出油口与转向器的进油口以及优先阀的进油口连通，优先阀的CF出油口与流量放大阀的进油口连通，优先阀的EF出油口连通有第三支路和第四支路，第三支路与第二主控阀的进油口连通，第四支路能够与第二支路连通。本发明提供的定变量液压系统，能够实现变量转向泵在全工况下起到变量调节的作用，从而充分发挥了变量转向泵的调节节能效果，进而提高了定变量液压系统的节能效果。
Fixed and variable hydraulic system of loading machine and loading machine
一种装载机定变量液压系统及装载机
DING WEI (author) / WANG YIQIAN (author) / GAO MINGQIAN (author) / WANG YUN (author) / WU ZONGCAI (author) / LI ZEHUA (author) / HAN HAO (author)
2022-06-24
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING
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