Reply to "vertical Moor showing high DE shaft vibration"

rkrMember

When you try to compare shaft readings in displacement to casing readings in displacement the difference will be due to the vibration transmission path. The shaft displacement is measured relative to the motor bearing and the casing reading is measured relative to the earth (seismic). You have to compare the shaft reading, 390 microns to the bearing internal clearance to see if you might be rubbing. In addition, you have to know the frequencies generating the 390 microns.
Set your hand held to read in velocity and see how the readings DE and NDE compare.
Do you have bearing temperature? Look at the trend data.
Ask the motor manufacturer for vibration limits on DE and NDE levels.

8/26/0911:04 AM

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