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  • Users: MER21
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  1. MER21

    Settle Out Pressure - Centrifugal Pumps

    Does settle out pressure apply to centrifugal pumps? I've only seen the term applied to compressors or multi-phase pumps.
  2. MER21

    Standard Flow Compensation Question

    Can someone explain why the design and actual MWs are inverted on standard flow compensation? Everything appears to work out fine for volumetric and mass flow compensation, but my actual and design MWs are inverted for standard mass flow compensation. Consider the following: P/ρ =...
  3. MER21

    Synchronous Motor Vibration - Approx 120 Hz w/ 1X sidebands

    electricpete, Bill, Scotty, thanks for your help and responses so far. Each motor has a pedestal-mounted sleeve bearing on the outboard end. The inboard end has no bearing - the rotor is directly coupled to the compressor. Therefore, we cannot run the motors uncoupled. The vibration does not...
  4. MER21

    Synchronous Motor Vibration - Approx 120 Hz w/ 1X sidebands

    electricpete, I see that ScottyUK has posted an MSWord 2003 version of the graphs. The first page shows spectrum and time waveforms for a 6600V motor (unit C25) with acceptable vibration levels. The second page shows identical graphs (0-1000 Hz, 0-0.341 s) for a 4160V motor (unit C30). The...
  5. MER21

    Synchronous Motor Vibration - Approx 120 Hz w/ 1X sidebands

    Hello, I've got what appears to be frame-resonance related vibration on several synchronous motors. I would like to understand the source of the vibration, what further testing should be conducted, and whether it is detrimental to the motors. We have 5,000-5,500 HP E-M synchronous motors, 327...

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