往复式压缩机气流脉动抑制方法研究

Research on the suppression method of gas pulsation in reciprocating compressor

针对往复式压缩机管道系统中气流脉动的问题,建立了试验平台对缓冲罐容积、缓冲罐出口管路角度以及缓冲罐出口管路组合膨胀腔型滤波器对压力脉动影响进行了试验和模拟研究,并分析了缓冲罐长径比、压缩机与缓冲罐之间接管长径比对管路系统气流压力脉动的影响规律。结果表明,当缓冲罐容积由0.008 3 m^(3)增加到0.094 m^(3)时,压力脉动值降低了40%,增大缓冲罐的容积可以有效降低管路的气流压力脉动;当出口管路的角度为60°时,压力脉动值最大降低了44%,通过改变缓冲罐出口管路的角度可以降低管路的气流压力脉动;在缓冲罐后的出口管路上安装组合膨胀腔型滤波器也可以有效降低管路的气流压力脉动,压力脉动值降低了59%;增加缓冲罐的直径比增加长度对降低管路内压力脉动更有效,当缓冲罐的长径比介于1.5~2.0时,对管路内压力脉动抑制效果最佳,当接管长径比介于1.25~1.75时,对管路内气流脉动抑制效果最佳。研究结果可为解决实际工程管路振动的问题提供参考。

For the problem of airflow pulsation in the pipeline system of reciprocating compressor,an experimental platform was set up to test and simulate the impacts of the buffer tank volume,buffer tank outlet pipeline angle and buffer tank outlet pipeline combination expansion chamber filter on pressure pulsation,and analyze the length and diameter ratio of buffer tank and the length and diameter ratio of the connecting pipe between the compressor and the buffer tank on airflow pressure pulsations in pipeline systems.The results show that increasing the volume of the buffer tank can effectively reduce the airflow pressure pulsation of the pipeline,the buffer tank increases from 0.0083 m^(3) to 0.094 m^(3),and the pressure pulsation value decreases by 40%;By changing the angle of the buffer tank outlet pipeline,the airflow pressure pulsation of the pipeline can be reduced,when the angle of the outlet pipeline is 60°,the pressure pulsation value decreases by 44%;By installing the combined expansion chamber filter on the outlet pipeline after the buffer tank,the airflow pulsation of the pipeline also can be effectively reduced;and the pressure pulsation value decreases by 59%;Increasing the diameter of the buffer tank is more effective than increasing its length for the pressure pulsation reduction in the pipeline,when the buffer tank L/D ratio is between 1.5~2.0,the suppression effect of pressure pulsation of the pipeline is the best,when the length of the connecting pipe L/D ratio is between 1.25~1.75,the suppression effect of the airflow pulsation in the pipeline is the best.The results of the study can provide a reference for solving the problem of pipeline vibration in actual engineering.