Root Cause Analysis

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  • 1.  High 0.5 X in NDE Motor

    Posted 06-04-2017 00:33
      |   view attached

    I have checked the vibration for Motor connected to the compressor and got 0.5 X (25 Hz) in NDE Machine spectrum Vertical & Horizontal but the highest in vertical, there is no 1X in spectrum, 2X and other non synchronous peaks are present, peak (0.5 X) is present in DE side but it is low, what could be the reason of peak 0.5 X (25 Hz)  ?

    type of compressor: Atlas Copco Air Compressor

    Power: 29 KW

    Speed: 2985 RPM

    Bearings: 6220



  • 2.  RE: High 0.5 X in NDE Motor

    Posted 02-18-2023 22:45

    is the 0,5 peak appears in all axes measurement or just one axes?

  • 3.  RE: High 0.5 X in NDE Motor

    Posted 07-03-2023 12:58

    There are multiple high frequency peaks not just 0.5 x,The 0.5x and other peaks could bearing defect frequencies. Pls check bearing defect frequencies

    Basit Khan

  • 4.  RE: High 0.5 X in NDE Motor

    Posted 07-04-2023 03:19

    It's a very old message in 2017, and complete information was not provided.

    I think it was 1x of the compressor because the Atlas Copco Air Compressor connected with the motor through the gearbox.

    tahir dawood anwar