The invention provides a pumping boom hydraulic system. The pumping boom hydraulic system is characterized by comprising an oil pump, a plurality of pipelines, a plurality of compensation valves, a plurality of reversing valves, a plurality of proportional valves and a plurality of oil cylinders arranged in parallel, wherein the oil outlet end of the oil pump communicates with the compensation valves and the reversing valves through the pipelines respectively, and the compensation valves and the reversing valves communicate with the proportional valves through the pipelines; and each oil cylinder comprises a rod cavity and a rodless cavity, and the proportional valves communicate with the rod cavities and the rodless cavities through the pipelines respectively. When the pumping boom hydraulic system of the structure works, pressure oil enters the pipelines from the oil outlet end of the oil pump, then enters the compensation valves, the reversing valves and the proportional valves and finally enters the rod cavities or the rodless cavities of the oil cylinders. Compared with a pumping boom hydraulic system of an existing structure, the pumping boom hydraulic system has the advantages that the pipeline layout is effectively simplified, the weight of a boom is reduced on the whole, and therefore the production and use cost of the pumping boom hydraulic system is lower. In addition, the invention further provides engineering machinery comprising the pumping boom hydraulic system.
本发明提出了一种泵送臂架液压系统,其特征在于,包括油泵、若干根管路、若干个补偿阀、若干个换向阀、若干个比例阀和若干根并列设置的油缸,所述油泵的出油端分别通过管路与补偿阀和换向阀连通,所述补偿阀和换向阀通过管路与比例阀连通;所述油缸包括有杆腔和无杆腔,所述比例阀分别通过管路与有杆腔和无杆腔连通。此结构的泵送臂架液压系统,工作时,压力油从油泵的出油端进入管路,再进入补偿阀、换向阀和比例阀,最后进入油缸的有杆腔或无杆腔,与现有结构的泵送臂架液压系统相比,其有效简化了管路布局,整体上减轻了臂架的重量,因此,其生产和使用成本更低。此外,本发明还提出一种包括上述泵送臂架液压系统的工程机械。
Pumping boom hydraulic system and engineering machinery
一种泵送臂架液压系统及工程机械
2021-10-01
Patent
Elektronische Ressource
Chinesisch
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