R290压缩机内排气管路气流脉动与模态分析
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摘要
R290压缩机在运转过程中因吸排气压力较大存在噪音较高的问题,本文提出从压缩机系统的角度对内排气管路的气流脉动进行仿真计算,并结合内排气管路结构模态分析,发现通过适当增加内排气管路消音包的容积,可以在基本不影响内排气管路结构模态的前提下,降低内排气管路气流脉动水平,从而降低压缩机整机噪音。对消音包容积增加前后的两种方案进行整机噪音测试,测试结果显示,整机噪音明显下降至42 dB(A),满足设计要求,对往复活塞式压缩机减振降噪具有重要的参考价值。
The noise of R290 compressor is high due to the higher suction and discharge pressure. In this paper, the numerical analysis of the air pulsation of the internal discharge pipeline in the view of system design was presented.Combined with the structural modal analysis of the internal discharge pipeline, we found that the air pulsation level of the internal discharge pipeline could be reduced without affecting the structural modal by enhancing the capacity of silencer, thereby the noise of the compressor was reduced. The compressor noise tests were carried out before and after the increase of the volume of the silencer. The test results showed that the noise of the compressor was obviously decreased to 42 dB(A), which met the design requirements and had important reference value for vibration and noise reduction of reciprocating compressor.
The noise of R290 compressor is high due to the higher suction and discharge pressure. In this paper, the numerical analysis of the air pulsation of the internal discharge pipeline in the view of system design was presented.Combined with the structural modal analysis of the internal discharge pipeline, we found that the air pulsation level of the internal discharge pipeline could be reduced without affecting the structural modal by enhancing the capacity of silencer, thereby the noise of the compressor was reduced. The compressor noise tests were carried out before and after the increase of the volume of the silencer. The test results showed that the noise of the compressor was obviously decreased to 42 dB(A), which met the design requirements and had important reference value for vibration and noise reduction of reciprocating compressor.
引文
[1]Bassi F,Pelagalli L,Rebay S,Betto A,Orefice M,and Pinto A.Numerical Simulation of a Reciprocating Compressor For Household Refrigerators[C].International Compressor Engineering Conference at Purdue,2000:97-104.
[2]李程,吕明,李海三,等.往复式压缩机气体脉动分析及压力降计算[J].化工机械,2016,43(4):472-475.
[3]李金娣,黄强胜,周继辉,等.压缩机内排气盘管排气脉动仿真及结构优化[C].2015年中国家用电器技术大会论文集,2015:758-764.
[2]李程,吕明,李海三,等.往复式压缩机气体脉动分析及压力降计算[J].化工机械,2016,43(4):472-475.
[3]李金娣,黄强胜,周继辉,等.压缩机内排气盘管排气脉动仿真及结构优化[C].2015年中国家用电器技术大会论文集,2015:758-764.