Analysis On The Vibration And Noise Control In Screw Compressor

Screw compressor with the characteristics of low-noise, low vibration, high reliability and long life , it is very promising, all walks of life across the country on the screw compressors growing demand. In order to meet the environmental requirements and user needs, it is essential to take effective measures to control noise of the screw compressor unit.Twin-screw compressor as the main research target , this paper mainly studies vibration and noise sources, transmission mechanism, principles of performances, and soon, in-depth studies vibration and noise control technologies, formulates optimization programs, and forecasts the implementations of the program results . Two grades vibration and noise control concept is put award, that is, passive and active control of combining control. The energy radiation is reduced from fault sources and propagating processes. The concrete research contents are as follows:Base on fault diagnosis, summarized the screw compressor generator breakdown diagnosis detailed process.The corresponding and reasonable solution is given for screw compressors' vibration issue so as to address the root causes of the vibration unit. A simplified model of the dynamic mechanical is established for noise structure analysis , research on the impact of various parameters to the acoustic noise radiated power. At the same time, gave a detailed analysis for sound absorption, sound insulation and noise muffler treatment.Aerodynamic noise is the major noise sources under detailed analysis according to the problem of its unqualified noise standard, in this paper, the simulation analysis for intake noise of the screw compressor rotor is carried out. A meshing model of the screw rod in screw compressor is built with ANSYS, which is a famous finite element analysis software, the displacement and stress are analyzed in different pressure, the modal analysis and the harmonic response analysis is done, we get the velocity boundary condition of its surface. boundary element methods are used to calculate acoustic radiation in SYSNOISE, and the calculation of acoustic radiation efficiency compared with the theoretical value , which provides the theoretical direction for decreasing noise. The results show that the structure and acoustic radiation models and methods are effective. It is also helpful in solvingpractical problems.Noise control on refrigerator of screw compressor. Signal of vibration eradiated from Refrigerator of screw compressor had been collected, and transform the signal into spectrum. The fault of unit is determined and eliminated, then make vibration reduction measure. Signal of noise had been colledted, and determined sound absorption material and structure by signal feature. Reverberation had disappeared and sound pressure level had declined in the room by treatment. It have a well reference for the screw compressor vibration and noise control.