制冷技术Issue(4)：5-9,5.
往复式制冷压缩机壳体振动声辐射特性的初步研究
A Study of the Vibration and Noise Radiation Characteristics of the Housing Shell of a Reciprocating Refrigeration Compressor
蔡建程 1储呈国 2李艳 2刘小莉2
作者信息
- 1. 浙江师范大学工学院,321004
- 2. 加西贝拉压缩机有限公司,314006
- 折叠
摘要
Abstract
Compressor is the key component which determines the noise levels of refrigerators and freezers. In this paper, an analysis of the noise types and their transfer paths of reciprocating refrigeration compressors is carried out firstly; the housing shell is the ultimate carrier of noise radiation of compressors. A specific refrigeration compressor was selected as the research object. Modal analysis was performed using both the finite element method and modal test in order to know natural vibrations. A constant force spectrum was applied on the locations of support springs and the weld point of the housing and the discharge pipe respectively to study the dynamic response and noise radiation of the housing shell. The results show that the frequency of the first structural modal with elastic deformation is up to 3 kHz; with the applied force spectrum, vibration and sound radiation are rather weak under 1 kHz, and as the increase of frequency, the sound radiation efficiency ramps up. When the analysis frequency exceeds the natural frequency of the first structural modal with elastic deformation, intensive structural vibration occurs, and with the high radiation efficiency, the radiation sound power is appreciable. Due to the structural modal occurs intermittently when the frequency is above 3 kHz, the intensity of vibration and noise radiation maintains at noticeable levels. The location of the applied force shows different effects on the vibration excitation; the force on the weld point happens to be more efficient at exciting the housing shell＇s vibration than the force on locations of the supporting rings.关键词
制冷压缩机/壳体/振动/声辐射Key words
refrigeration compressor/housing shell/vibration/sound radiation分类
通用工业技术引用本文复制引用
蔡建程,储呈国,李艳,刘小莉..往复式制冷压缩机壳体振动声辐射特性的初步研究[J].制冷技术,2011,(4):5-9,5.
