Transcription of Vibration Case Histories
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Vibration Case Histories
9/19/20061 Vibration case HistoriesVibration case HistoriesBarry T. CeaseMeadWestvaco9/19/20062 IntroductionIntroduction case History#1 ExcessiveVibration Of Motor case History#2 Strange Motor &Gearbox Vibration case History#3 Repeat FanBearing Failures case History#4 Pump BearingCage Failure9/19/20063 case History#1, case History#1,Excessive Vibration Of MotorExcessive Vibration Of Motor EQUIPMENT: Nash 9000 seriesvacuum pump driven by a singlereduction, parallel gearbox and a700 HP synchronous motor. The vacuum pump is one of manyused to pull water out of the paper(dry it) as it moves thru #1 Equipment LayoutCH#1 Equipment Layout9/19/20065CH#1 - ProblemCH#1 - Problem Excessive & noisy Vibration atmotor. This problem could be heard & feltclearly at the motor. It sounded like something wasrubbing and/or #1 Test Data & ObservationsCH#1 Test Data & Observations(Motor)(Motor) Motor speed wasexactly400 rpm. Pump speed was 267 rpm. Pump Vibration data showed noabnormal patterns or levels.
9/19/2006 2 Introduction Case History#1 – Excessive Vibration Of Motor Case History#2 – Strange Motor & Gearbox Vibration Case History#3 – Repeat Fan Bearing Failures
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