The cold test stands accommodate different bearing-supported areas, wherever needed to ensure the structural durability of the design. These bearings vary in type and functionality. Some bearings are located along the driveline; others are embedded in the variable frequency drive driving the rotating machinery of the cold test stand, up to the support of the engine crankshaft bearing. The presence of several bearings along the power line makes it a challenge to determine the defect source when it occurs. If the cause of the malfunction is due to the failure of one of the supporting bearings, then a downtime is needed for the engine maintenance and diagnostics. This paper proposes an effective approach for the prediction of premature bearing failure through the analysis of the torque signals and the accelerometers feedback imported from the suspected regions.
Bearing diagnostics Cold test Torsional vibration Premature failure Driveline Variable frequency drive
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