往复式增压器的运动特性分析

增压器作为超高压水射流切割机的＂心脏＂,其运行参数直接决定了整台设备的性能.基于牛顿第二定理和水的压缩性公式,建立了不同行程时间段增压器内部的运动微分方程,并通过MATLAB软件对其进行了数值求解.由分析可知,系统油压是增压器运动的重要影响参数,增压器在3个不同的阶段具有明显不同的运动特性,整体呈现先作加速度不断减小的加速运动,接着作加速度不断增加的减速运动,最后作加速度不断减小的减速运动的规律.在行程中出现的最大速度,也远远大于整个行程的平均速度.将理论分析结果与试验结果进行了比较,证明了理论分析的合理性.

Study on moving characteristics of reciprocating intensifier

As the ＂heart＂ of the super-high pressure water jet cutter, intensifier＇s running parameters control the capability of whole equipment. Differential equations with different time were found based on the Newton second law and the compressible equation of water. The numerical solutions were gained from MATLAB software. The analysis reveals that the hydraulic pressure is an important parameter and the intensifier has different moving characteristics in three different displacement time. First, the velocity in- creases continually with the decreasing acceleration; then the velocity decreases with the acceleration increasing; finally the velocity decreases with the acceleration decreasing. In the entire displacement, the maximum velocity is higher than the average velocity. Lastly, the results are compared with the experiment and proved to be reasonable.