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| Identification and Control of Low Frequency Noise in Turbo Charging Station |
| Received:May 02, 2018 Revised:June 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.06.017 |
| KeyWord:compression station low frequency noise aerodynamic noise |
| Author | Institution |
| ZHANG Bo |
Research Institute of Chongqing Gas Mine Technology, Southwest Oil and Gasfield Company-Chongqing Gas District, Chongqing , China |
| LIANG Zi-xiao |
State Key Laboratory of Mechanical Transmissions, College of Mechanical Engineering, Chongqing University, Chongqing , China |
| YIN Ai-jun |
State Key Laboratory of Mechanical Transmissions, College of Mechanical Engineering, Chongqing University, Chongqing , China |
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| Abstract: |
| Objective To solve the problem of low frequency noise of natural gas booster station, identify sources of low frequency noise and control low frequency noise. Methods According to the actual working condition and structure of the compressor unit, the vibration and noise characteristics of the turbocharger unit were analyzed by spectrum analysis and 1/3 frequency doubling process, and the relationship between the low frequency noise of the compressor station and the vibration of the unit was preliminarily determined. The coherent function analysis method was used to analyze the coherent relationship between the vibration and the low frequency noise. The low frequency noise was not caused by vibration. Results The main noise source of the unit was the cooler and the intake and exhaust pipe of the compressed cylinder. The low frequency noise pollution was mainly caused by the aerodynamic noise projected by the pipe and the unit wall during the periodic suction and exhaust of the unit, and the violent vibration of the source of the unit was not the main cause of the low frequency noise pollution. The intake and exhaust pipe could produce full band noise of up to 80 dB (A), including the sound pressure level up to 100 dB, especially the frequency 11 Hz and 17 Hz, and the transmission distance was far, the permeability was strong, and the harm to the personnel and the environment was great. Conclusion According to the intake and exhaust pipe as the main noise source and in combination with the actual situation of compression station, the corresponding improvement measures are put forward from compressor unit’s overall noise reduction design and the noise reduction design of the factory management, to provide an effective method for reducing the noise of the unit. |
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