混凝土泵开式液压系统换向冲击控制方法研究

Study on Control Method for Hydraulic Impact of Open Hydraulic System in Concrete Pump

在开式混凝土泵送系统优化设计的研究中,根据开式混凝土泵送系统的工作原理,对其在换向过程中液压冲击现象产生机理进行了理论分析,得出换向液压冲击压力值与主油泵排量呈线性关系。由此提出了变排量控制方法来减小系统换向液压冲击。在保证泵送活塞不撞缸以及活塞行程控制精度的前提下,对泵送系统的换向时机以及变排量时间参数进行了优化。选取某型号混凝土泵,对其泵送系统进行AMESim建模仿真以及实验,结果表明,采用主油泵变排量控制方法能够有效减小泵送系统的换向冲击。

According to the working principle of open hydraulic system in concrete pump, and though the theoretical analysis on the phenomenon of hydraulic impact in direction changing process, it is concluded that the impact pressure has a linear relation with the displacement of the main oil pump. To solve the hydraulic impact problem, a variable displacement method was raised. Under the requirement that the piston does not strike the bottom of cylinder and requirement of piston stroke control accuracy, the authors optimized the pumping direction changing process time parameters and the displacement control time parameters. Though the AMESim modeling simulation and experimental study, the variable displacement control method is proved feasible in reducing the hydraulic impact in direction changing process.