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Study on mechanism and improvement of triple frequency noise of rotary compressor.

Number: pap. 1268

Author(s) : TAN S., ZHU B., WU J., et al.

Summary

With the continuous improvement of social life, people’s requirements for the noise of home air conditioners are becoming increasingly strict. As the kernel of an air conditioner, compressor provides power for the whole system, inevitably generating vibration and noise. Therefore, reducing the vibration and noise of the compressor has significant influence on the noise reduction of the air conditioner. Generally, vibration is mainly transmitted through the suction and discharge pipes to the air conditioning pipe system. However, due to the complicated configuration, there are intensive modals for the pipe system, especially those in low frequency ranges, which may lead to resonance and large acoustic radiation. This paper studies on the generation and transmission mechanism of triple frequency vibration of the compressor. The compressor’s discharge pressure fluctuation causes the discharge pipe to vibrate, and then results in vibration of the air conditioning pipe systems; and vibration generated by the rotor is transferred to suction pipe via the accumulator, which will cause the pipe systems to vibrate. Based on this research, we find some main factors which influence the triple frequency vibration and noise of the compressor, including the discharge pressure pulsation, the natural frequency of the rotor-crankshaft system swing, and the natural frequency of the accumulator swing. Then, the aforementioned factors which affect the compressor vibration and noise are analyzed separately. Finally, noise tests on the improved compressor at 90Hz are conducted. The results show that the compressor noise are reduced by 29.8% at 250Hz band expressed in 1/3 Octave.

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Pages: 7

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Details

  • Original title: Study on mechanism and improvement of triple frequency noise of rotary compressor.
  • Record ID : 30024270
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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