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Natural Science Forum / Physics / Acoustics / October 2005Compressor 2x noise
Hello Everyone... >From FFT analysis, it is known that 2x (twice of rotating speed)frequency noise is very dominant for centrifugal compressor. This component is over 10dB than other frequency components. But how can 2x frequency noise component can be possible in centrifugal compressor? Can exhaust components be such noise source? > Hello Everyone... > [quoted text clipped - 6 lines] > > Can exhaust components be such noise source? Bear in mind that most noise and vibration problems can be reduced to excitation*response = output. There is a good chance that you have aresonance near the frequency of concern. Cheers Greg Locock >> Hello Everyone... >> [quoted text clipped - 16 lines] > > Greg Locock What kind of compressor is he dealing with? Centrifugal type Compressor No gear... Rotated by permanent magnetic type rotor...controlled by inverter. Supported by air foil bearing 1 and 2 stage compression at 1 rotor. |
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