陈 辉，赵旭敏，叶晓飞，王 伟，竺宁凯

( 珠海格力电器股份有限公司，珠海 519000 )

旋转压缩机止推噪声产生机理分析及试验研究

陈 辉，赵旭敏，叶晓飞，王 伟，竺宁凯

( 珠海格力电器股份有限公司，珠海 519000 )

结合旋转压缩机噪声频谱及声强扫描图谱特性，确定了止推噪声频段主要集中在压缩机泵体底部。通过流场仿真分别计算出压缩机电机上下腔的压力脉动幅值，从而得出转子上下端面气体力差值峰值大小，确定了气体力差值可引起转子轴向跳动，导致曲轴上下止推面碰撞轴承端面，产生止推噪声。本文提出了一种旋转压缩机低噪声综合设计方案，并通过试验对该低噪声综合设计方案进行了验证和分析，测试结果表明，方案合理可行，有效防止了旋转压缩机止推噪声的产生且降低了压缩机噪声总值。

压缩机；止推噪声；频谱；流场

Abstract：The paper comes to a conclusion that the thrust noise is mainly concentrated in the bottom of the compressor pump body through the speciality of the sound power spectrum and sound intensity scanning atlas.The main reason of the gas physical difference of the rotor upside face and bottom face is that the pressure pulsation amplitude on the compressor moter upside chamber and bottom chamber.The gas physical difference is big enough which can cause the rotor moving up and down.The thrust noise is produced by the bent axle and the bearing colliding with each other.The paper provides a scheme of compressor low-noise designing，and the noise spectrum of the low-noise designing compressor is tested and analysed.The test result showed that this scheme is reasonable and feasible，which can prevent the thrust noise producing and reduce the total cost of the compressor noise.

Keywords：Compressor；Thrust noise；Frequency spectrum；Flow field

0 引言

随着人民生活质量的提高，作为现代生活高质量标志之一的空调器，其噪声大小及听觉感受越来越受到人们的重视，压缩机作为空调的主要噪声源，噪声的高低已成为衡量压缩机质量及空调器品质的一个重要指标，压缩机低噪声设计已成为各大企业和科研机构研究的重点[1-2]。

压缩机工作原理导致产生气流脉动和机电噪声，将声学知识与压缩机的工作原理相结合，对压缩机噪声的大小、特性及分布进行精确的测量分析，针对不同频率的噪声成分，设计合适的消音方案，是压缩机低噪声设计的基础[3]。……