激波器-管道液压激振系统及控制规律研究

Study on Hydraulic Exciting System Consisted of Pipeline and Wave-exciter and Controlling Rule

研究了液压波动的机制,构建了激波器-液压管激振系统,研究液压管道振动的控制规律。通过变频器变频控制激波器的启闭,使液压管产生周期性的振动。建立由液压泵站、激振液压缸、连接管路、激波器驱动电机、激波器组成激振试验系统,采集管道不同测点处的振动信号进行分析,得出管道振动的规律。实验结果表明:在相同的激振频率条件下,管路的激振频率随系统压力的增大而减小;在频率和压力一定时,管路上不同点处其振动的波形相同,几乎不存在相位差,但不同点处振幅大小不一致,靠近液压缸的管道振动比靠近激波器的管道振动剧烈一些。

Hydraulic fluctuation mechanism was studied, the hydraulic exciting system consisted of wave-exciter and pipeline was constructed, and the controlling rule for vibration of hydraulic pipeline was studied. Pipe periodical vibration was produced by frequency-changer controlling opening and closing of wave-exciter. Hydraulic exciting test system consisted of hydraulic power source, exciting vibration hydraulic cylinder, connected pipeline, motor for driving wave-exciter and wave - exciter were set up. By collecting and analyzing the vibration signals of pipeline on different measurement points, the pipeline vibration law was obtained. The test results show that the pipe exciting frequency is reduced along with system pressure increasing on the same condition of exciting frequency. The vibration wave shapes on pipe different points are the same and almost have no phase difference, but the vibration amplitudes of different measurement points are not the same, which near the hydraulic cylinder are more strenuous than that near the wave-exciter.