往复压缩机管道系统气柱固有频率研究  

Study on Natural Frequency of Complicated Gas System in Reciprocating Compressor Pipelines

作　　者：韩文龙[1] 韩省亮[1] 宋辉辉[1] 

机构地区：[1]西安交通大学航天航空学院机械结构强度与振动国家重点实验室,陕西西安710049

出　　处：《压缩机技术》2013年第3期1-6,共6页Compressor Technology

基　　金：国家自然科学基金(10902080);中央高校基本科研业务费专项资金(91016008)

摘　　要：往复压缩机管道系统中气柱的共振是引起管道振动的主要原因之一,因此研究管道系统气柱固有频率对避免气柱系统发生共振具有重要的理论意义和工程实用价值。通过实验和数值分析的方法:比较了频响函数法和传递矩阵法在计算气柱固有频率时的优劣,发现频响函数法更切合于实际;研究了流量对不同管管路系统气柱固有频率的影响,得出流量对含孔板等阻力元件的管道系统气柱固有频率有直接影响,而无阻力元件的管道系统气柱固有频率不受流量的影响;结合空冷器的设计原理提出了空冷器作为管道系统中特殊管路元件时的参数化模型即当量管长和当量直径,并通过实验和数值模拟验证了参数模型的合理性。The gas resonance in reciprocating compressor piping system can result in piping system vibration. It becomes significant to research on gas natural frequency to avoid the gas resonance in piping system.In this paper,experiments and numerical simulation are performed to study the gas resonance.By the comparison between frequency response function method and transfer matrix method, it is found that it is more close to experiment results by frequency response function method to calculate gas natural fre- quency.The impact of flow on different piping system＇s gas natural frequency is studied. It is found that the flow has direct impact on gas natural frequency of piping system with orifice plate and other resistance components. However, gas natural frequency of the pip- ing system without resistance components isn＇t affected by flow.Combined with air cooler＇s design principle,it is proposed that the parametric model of air cooler as special pipe component of piping system, namely equivalent length and equivalent diameter, and the parametric model＇s rationality is verified through experiments and numerical simulation.

关 键 词：管道系统 气柱固有频率 流量 空冷器 

分 类 号：TH457[机械工程—机械制造及自动化]