气液分离器高频异常噪声分析与改善
Analysis and improvement of high-frequency abnormal noise of gas-liquid separator
杜明龙 1徐坤 1姜志成 1徐亚男 1李钟昀1
作者信息
摘要
针对空调器室外机气液分离器出现 1 208 Hz异常噪声的问题,基于模态测试与仿真理论,对气液分离器的内部管路进行模态测试与仿真分析.研究结果表明:该异常噪声由气液分离器的固定板与内部管路局部共振引起;模态测试与仿真的固有频率仅差 6 Hz,且模态振型一致,说明有限元模型准确性高,可用于指导方案的优化设计,缩短验证周期;固定板采用翻边设计,且内部管路薄弱部位增加 2 块固定板,气液分离器的固有频率可以有效避开 1 208 Hz的激振频率,使室外机的噪声值从 67.6 dB(A)降低至 66.5 dB(A),1 208 Hz频率下的噪声峰值从 60.76 dB(A)降至 35.46 dB(A),高频异常噪声消失,改善显著.
Abstract
Aiming at 1 208 Hz abnormal noise from the gas-liquid separator of the out-door unit of the air conditioner,based on the modal test and simulation theory,the modal test and simulation analysis of the internal pipeline of the gas-liquid separator are carried out.The study results show that the abnormal noise is caused by the local resonance of the fixed plate and the internal pipeline.The natural frequency difference between modal test and simulation is only 6 Hz,and the modal shapes are consistent.The finite element model has high accuracy,which can be used to guide the optimization of the scheme and shorten the verification cycle.The fixed plate adopts flanging design,and two fixed plates are added at the weak part of the internal pipeline.The natural frequency of the gas-liquid separator effectively avoids the excitation frequency of 1 208 Hz.So that the noise value of the outdoor unit is reduced from 67.6 dB(A)to 66.5 dB(A),and the peak value at 1 208 Hz is reduced from 60.76 dB(A)to 35.46 dB(A).The high-frequency abnormal noise disappears and the improvement effect is significant.
关键词
空调器/室外机/气液分离器/噪声/模态/仿真/优化Key words
air conditioner/outdoor unit/gas-liquid separator/noise/modal/simula-tion/optimization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据