混凝土泵泵送系统液压冲击的主动控制方法研究

Study of active control of hydraulic impact in concrete pumping system

混凝土泵送液压系统在换向阀换向时普遍存在着严重的液压冲击现象,产生液压冲击的主要原因是换向时油路中的油液以及负载的动能瞬时转化为压力能,而油液以及负载产生的动能与泵的排量有关系。针对此种现象,文章提出了一种通过主动减小泵的排量来控制液压冲击的方法,通过理论分析、AMESim建模与仿真分析以及实验研究验证了这种主动控制方法的可行性。

There exists serious hydraulic impact problem in concrete pumping hydraulic system when the valve changes its direction,and the main cause is that the kinetic energy of the oil and load is transformed into pressure energy within a very short time.The kinetic energy of the oil and load is related to the displacement of the pump.In this paper,a method to control the hydraulic impact by the active reduction of the displacement of the pump is proposed.And through the theoretical analysis,AMESim modeling and simulation and experimental study,this active control method is proved feasible.