This case study describes findings on two top bearings during proof-of-concept measurements using the portable instrument Leonova Diamond in one case, and a fixed installation with the Intellinova Compact online system in the other.

Following a previous gearbox failure on the screw pump, the top bearing was allegedly unaffected; yet measurements revealed raised shock pulse levels corresponding to the outer race defect frequency. When the bearing was disassembled, there were signs of scoring and smearing.

The second case clearly demonstrated the merits of the HD ENV technology which picked up increasing vibration levels, whereas acceleration measurements indicated no significant amplitude changes over the same time period. Lubrication of the top bearing only resulted in a temporary drop in the HD ENV levels, thus indicating bearing damage.

The results of these trial measurements confirm the merits of employing SPM’s HD condition monitoring technologies on screw pumps, where potential failures pose significant environmental risks, along with costly repairs and hefty fines.