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介绍一种可用于测量液压系统高压侧流量的行星齿轮流量计,其工作原理是将被测的流量信号,转换成齿轮的转速信号,然后再通过单片机确定被测系统的流量。当被测液压系统的流量改变时,流量计内齿轮的动能及流经流量计流体的动能也会改变。重点考察上述两种动能的变化对被测流体的影响,结果表明,当被测流体流量在1～1000Hz频率范围内变化时,齿轮动能的变化对被测流体的影响相对流体液压能的变化产生的影响可以忽略;而流体动能变化对被测流体的影响与被测流体的流量变化频率无关,且相对于流体液压能的变化,其影响也可以忽略。
A planetary gear flowmeter that can be used to measure the high pressure side flow of hydraulic system is introduced. Its working principle is to convert the measured flow signal into a gear speed signal, and then to determine the flow rate of the system under test through the single chip microcomputer. When the measured hydraulic system flow changes, the kinetic energy of the flow meter gear and flow through the flow meter fluid kinetic energy will change. The effects of the above two kinetic energy changes on the measured fluid are investigated emphatically. The results show that when the measured fluid flow rate changes in the frequency range of 1 ~ 1000 Hz, the change of gear kinetic energy affects the measured fluid relative to the fluid hydraulic energy The influence of fluid kinetic energy on the measured fluid has nothing to do with the frequency of the flow of the measured fluid, and its influence on the hydraulic energy of fluid can be neglected.