液压缸脉冲式激振系统数学建模及其实验测试研究

Research on Mathematical Modeling and Experiment of Hydraulic Cylinder Pulse Excitation System

液压激振系统为液压传动领域一个重要的研究方向。在分析液压缸脉冲式激振系统激振过程的基础上,建立液压缸两腔压力和流量波动的微分方程。通过测试得到了脉冲式激振系统中液压缸脉冲式液压变化频率规律,从波形规律可看出两液腔压力变化规律与理论分析相一致。在定量泵供油的节流调速系统中,将流量控制阀和溢流阀配合使用,以借助控制机构使阀芯相对于阀体孔运动。压力损失会使得振动幅值稍有降低的变化趋势,但这影响不大。液压脉冲系统的液腔脉冲式变化频率规律的研究为相关振动系统的设计提供了理论依据。

The hydraulic vibration system is the most important research direction in the field of hydraulic transmission. On the basis of analyzing the hydraulic cylinder pulse excitation system vibration process, the two cavity pressure and flow fluctuation differen- tim equations of the hydraulic cylinder were established. The hydraulic cylinder hydraulic pulse type frequency change rule was obtained by test. From the waveform law, two fluid cavity pressure changing rule was consistent with the theoretical analysis. In a quantitative pump throttle speed regulation system, the flow control valve and relief valve were cooperate to make valve core hole move relative to the valve body through control mechanism. Pressure loss made vibration amplitude slightly lower, but the impact was not big. The re- search on hydraulic pulse system fluid cavity pulse type change rule provides a theoretical basis for vibration system design.