克75撬装往复式压缩机管线振动的原因分析

往复式压缩机的管道振动主要是由于气流脉动引起的,尤其是当压缩机的激振频率接近管道固有频率时,管线系统会发生共振,严重影响管道的安全运行。新疆油田公司采气一厂的克75天然气处理站有3台压缩机的管道自安装运行后一直存在较为严重的振动问题。本文首先对克75往复压缩机撬的管线振动情况进行了测量,获得了管道振动危险点的振幅值和振动频率。然后建立了管线的CAESAR Ⅱ模型,计算了往复压缩机管线的固有频率,分析了产生振动的原因主要是由共振引起的。然后本文并提出切实可行的改进措施,通过改变支撑的位置和刚度,调整管线系统的固有频率消除共振。改造后的振动测量表明,减振措施取得了良好的效果,消除了装置运行的一大隐患,为同类型装置振动问题的解决提供了可以参考借鉴的方案。

Pipeline vibration analyse for Ke75 skidded reciprocating compressor

The main reason for the vibration of the pipeline of the reciprocating compressor is the pressure pulsation, especially when the natural frequency of the pipeline equal to frequency of stimulate vibration, sympathetic vibration will occur and that will affect the normal operation.The pipeline of skidded reciprocating compressor belong to NO.1 Gas Production Plant of XinJiang Oilfield Company have been vibrated since it was installed.The experimental tests is done to get the vibration data and vibration frequency for the pipe system of the skidded reciprocating compressor.Then the Caesar II model is established to caculate the natural frequency of the piping system and to analyse the reason for the piping vibration.Through change the location and rigidity of the piping support to adjust the natural frequency of piping system, the piping sympathetic vibration is eliminated.After the adjusting, good vibration attenuation effect was achived and hidden troubles to smooth running or the unit eliminated and what presented herein could be referenced in reduceing the pipeline vibration of skidded reciprocating compressor.