涡旋压缩机排气管道进气口与扩张腔对压力脉动影响研究

Research on the Influence of the Inlet and Expansion Chamber of the Exhaust Pipeline of a Vortex Compressor on Pressure Pulsation

摘要: 针对涡旋压缩机排气压力脉动值大的问题，以某型号涡旋压缩机为对象，基于声音传递损失特性，研究了对消音器的进气口与扩张腔进行不同的串并联管道腔后对压力脉动的影响。提出四种变更方案，应用actran软件对原始方案和四种变更方案进行仿真计算得到声压响应对比图，并在消音室内完成压力脉动试验以验证研究方案的合理性和有效性。研究结果表明，四种方案的仿真计算及实验验证结果均对脉动改善产生积极的效果，其中改善效果最明显的是方案四提出的消音器双进气管搭配扩张腔加缩小腔的变更结构，在3000 rpm下，排气压力脉动相比原始方案降低了13,022 Pa。

Abstract: In response to the problem of high exhaust pressure pulsation in a vortex compressor, a certain model of vortex compressor was taken as the object. Based on the characteristics of sound transmission loss, the influence of different series and parallel pipeline cavities on pressure pulsation was studied for the inlet and expansion chamber of the muffler. Propose four change plans, apply Actran software to simulate and calculate the original plan and the four change plans, and obtain a comparison chart of sound pressure response. Conduct pressure pulsation tests in the soundproof chamber to verify the rationality and effectiveness of the research plan. The research results indicate that the simulation and experimental verification results of the four schemes have a positive effect on improving pulsation. Among them, the most obvious improvement effect is the modified structure of the muffler with dual intake pipes and expansion and contraction chambers proposed in scheme four. At 3000 rpm, the exhaust pressure pulsation is reduced by 13,022 Pa compared to the original scheme.