Alignment of the shaft line and main engine

Alignment of the shaft line and main engine – this is a critical technical operation that includes:

1. Preparatory Work:

• Defect detection of all shaft line elements
• Checking the engine foundation condition
• Checking engine mounting
• Measuring existing clearances and positions

2. Main Alignment Works:

• Main engine alignment relative to foundation
• Engine height and horizontal positioning
• Shaft line alignment relative to engine
• Checking the alignment of all shaft line elements:
  
  • Engine crankshaft
  • Intermediate shaft
  • Propeller shaft
  • Stern tube device

3. Measurement Methods:

• Laser alignment
• Optical alignment
• Dial indicator measurements
• Hydraulic measurements

4. Adjustment Works:

• Selection and installation of engine chocks
• Bearing position adjustment
• Coupling adjustment
• Clearance adjustment

5. Control Operations:

• Cold condition alignment check
• Hot condition alignment check
• Vibration measurements
• Checking shaft journal bearing contact

6. Documentation:

• Preparation of measurement protocols
• Preparation of alignment reports
• Coordination with classification society

Proper alignment is critically important for:

• Vibration reduction
• Bearing wear reduction
• Prevention of shaft line breakdowns
• Equipment service life extension
• Optimal main engine operation