sinusoidal phase difference—are textbook signatures of mechanical unbalance. The Resolution
In these studies, specific vibration signatures point to distinct mechanical faults:
These documents typically follow a structured investigation:
Unbalance and resonance are the two most common issues in fans. These case studies show how to resolve them:
: A machine experiencing high vibration and overload tripping was diagnosed with misalignment and looseness between the motor and gearbox. Remedial actions included replacing worn coupling bushes and performing laser alignment , which reduced vibration from 20 mm/s to under 2.5 mm/s.
3. Early-Stage Bearing Fault Identification in a Multi-Stage Gearbox The Problem
Roller bearings used in rolling mill industries are subjected to extreme loads and operating conditions. Detecting bearing faults early is essential for preventing catastrophic mill failures, but the high noise environment and complex vibration transmission paths make fault identification challenging.
Structural looseness (loose foundation bolts) combined with bearing clearance issues.