Abstract
The noise control of a compressor has always been a hot spot in the field of industrial application. In this paper, the air inlet structure of the sound insulation hood of an air compressor unit was studied and improved. Acoustic finite element numerical simulation analysis of the sound insulation hood model was carried out using the acoustic software LMS Virtual Lab Acoustics. The simulation results were compared with the experimental data to verify the correctness of the model, and the theoretical results showed a good agreement with the experiment data. The sound insulation performance of the sound insulation hood under different structures was also investigated in this paper. The results show that the main source of unit noise leakage is outward radiation through the air inlet. In addition, the noise at the air inlet of the unit and the overall noise were significantly reduced compared with the traditional sound insulation hood upon installing 120° and 90° diaphragm structures on the inner wall of the air inlet. The optimization results show that the noise reduction effect of the sound insulation hood with a 90° diaphragm structure was better than that with a 120° diaphragm structure.
Highlights
The noise control of a compressor has always been a hot spot in the field of industrial application
Wu et al [9] investigated the airflow pulsation produced by the discharge process of screw compression and conducted an in-depth study on the mechanism of airflow pulsation noise, which provided a theoretical analysis for reducing the airflow pulsation noise of screw air compressor and important guidance for the improvement of noise reduction measures in engineering application
In order to further verify the location of noise sources and determine the impact of the sound insulation hood structure on noise radiation, Siemens acoustic camera test equipment was used in this chapter
Summary
The noise control of a compressor has always been a hot spot in the field of industrial application. Wu et al [9] investigated the airflow pulsation produced by the discharge process of screw compression and conducted an in-depth study on the mechanism of airflow pulsation noise, which provided a theoretical analysis for reducing the airflow pulsation noise of screw air compressor and important guidance for the improvement of noise reduction measures in engineering application. A sound insulation hood of an air compressor unit is proposed, and the influence of different air inlet structures of the sound insulation hood on the noise reduction effect of the unit noise is researched. A theoretical reference for the noise reduction of the air compressor unit is provided by analyzing the performance of the sound insulation hood
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