摘要
为降低空调器室外机的振动噪声,基于模态叠加理论,建立涡旋式压缩机吸气管路的有限元模型,获得吸气管在压缩机激振力下的频率响应,并进行优化设计和试验验证。结果表明:在压缩机频率为65.0 Hz时,压缩机绕自身中心摆动,带动吸气管与压缩机吸气口连接位置振动,最大振动位移为0.58 mm;通过对吸气管增加“U”形折弯设计,缓冲压缩机至吸气管的振动传递,吸气管的振动幅值降低至0.17 mm,同时有效地降低吸气管至气液分离器的振动传递;对安装优化后吸气管的室外机进行制热工况扫频噪声试验,在压缩机运转转速范围内噪声值降低2~3 dB(A)。
In order to reduce the vibration noise of the outdoor unit of air conditioner,based on the modal superposition theory,the finite element model of the suction pipe of the scroll compressor is established,and the frequency response of the suction pipe under the excitation of the compressor is obtained.The optimization design and test verification are conducted.The results show that under the compressor frequency of 65.0 Hz,the compressor swings around its own center,which drives the vibration of the connection po-sition between the suction pipe and the suction port of the compressor,resulting in the maximum vibration displacement of 0.58 mm.By adding“U”bending design to the suction pipe,the vibration transmission from the compressor to the suction pipe is buff-ered,the vibration amplitude of the suction pipe is reduced to 0.17 mm,and the vibration transmission from the suction pipe to the gas-liquid separator is effectively reduced.After optimization,the suction pipe is installed to the outdoor unit,and the noise test while sweeping frequency under heating condition is conducted.Within the operating speed range of the compressor,the noise value is reduced by 2-3 dB(A).
作者
杜明龙
刘坤
姜志成
Du Minglong;Liu Kun;Jiang Zhicheng(Qingdao Hisense Hitachi Air-conditioning Systems Co.,Ltd.)
出处
《制冷与空调》
2023年第3期35-38,共4页
Refrigeration and Air-Conditioning
关键词
空调器
涡旋式压缩机
振动
噪声
吸气管
有限元
频率响应
air conditioner
scroll compressor
vibration
noise
suction pipe
finite ele-ment
frequency response
