cement mill trunnion bearing parts

The trunnion bearing is a critical component of a cement mill, supporting the rotating drum and ensuring smooth operation. Below are the key parts associated with a cement mill trunnion bearing assembly:

Main Trunnion Bearing Components

1. Trunnion Shaft
– The cylindrical shaft connected to the mill shell that rotates on bearings.

2. Bearing Housing (Plummer Block)
– Encloses and supports the bearing assembly.
– Typically made of cast steel or ductile iron.

3. Main Bearings
– Usually hydrodynamic slide bearings (white metal-lined) or roller bearings (spherical roller bearings).
– Designed to handle heavy radial and axial loads.

4. Bearing Liner/Bushing
– A replaceable sleeve made of bronze or babbitt metal (white metal) for smooth rotation.

5. Lubrication System
– Oil circulation system with pumps, filters, and coolers.
– Ensures proper lubrication to prevent overheating.

6. Seals & Gaskets
– Prevent dust ingress and oil leakage.
– Common types: labyrinth seals, lip seals, or mechanical seals.

7. Thrust Pads/Plates
– Absorb axial forces from mill rotation.

8. Base Frame & Sole Plates
– Provides structural support and alignment for the bearing housing.

9. Temperature & Vibration Sensors
– Monitor bearing health to prevent failures.

Common Issues & Maintenance Tips

• Overheating → Check lubrication flow & oil quality.
• Excessive vibration → Inspect alignment & bearing wear.
• Oil contamination → Replace filters regularly.
• White metal damage → Re-pour or replace bushings if worn.

Manufacturers & Replacement Parts

Leading suppliers include:

• FLSmidth
• ThyssenKrupp
• Metso Outotec
• SKF / FAG (for bearings)
• Schaeffler Group

Would you like details on installation procedures or troubleshooting specific problems?