Envelope spectra of GB-256 (Tar Pump) is showing 1xRS and 2xRs,

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Presentation transcript:

Envelope spectra of GB-256 (Tar Pump) is showing 1xRS and 2xRs, No bearing defect frequencies, appear 1xRS and 2xRS, what is cause it? Why 1xRS is dominant in envelope spectra? 1xRS 49.375Hz 2xRS

After overhaul, took data on 14 December 2009, 1xRS and 2xRS disappear at envelope spectra We found Stationary O ring at MechSeal was broken. But is it causing the 1xRS appear on envelope spectrum? 1xRS, peak decrease from 1.306 g p-p to 0.048 g p-p

Stationary O Ring

In velocity spectrum exist 2.5Hz, what is this? 2xRS 2.5 Hz, what is ? 5xRS 1xRS 10xRS

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