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OP asked "a query: is it possible to diagnose anomalies in babbit bearings (sleeve bearings) using the Acceleration Envelope?"

If there are no proximity probes (displacement) or shaft riders (velocity) on machine, then typically bearing housing measurements would be made with an accelerometer. The common choice is velocity spectrum and waveform for diagnostics. Acceleration measurements may detect looseness with bearing inner liner or tilt pads. Acceleration Envelope may help with detection of friction and impacts.

I have used PeakVue (Emerson-CSI) as a "similar to Acceleration Envelope method" on a few journal/sleeve bearings on motors, fans, pumps and hydro turbines. I would not try to sell the method or the instrument for this application, but I did find some benefit.

Here are some links to past discussions:

sleeve bearing peakvue?

From <https://www.maintenance.org/to...eeve-bearing-peakvue>

Analysis technique for sleeve bearing using casing measurement

From <https://www.maintenance.org/to...963965274#5641047653>

"typical" sleeve bearing motor vibration

From <https://www.maintenance.org/to...ring-motor-vibration>

Do not rely solely on Acceleration Envelope for bearing diagnostics, but consider that it may be of some value if properly applied with great patience!

Walt

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