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Pump-Motor Shaft Alignment Procedure -: Pump and motor shaft alignment ensures the rotational axes of the pump and motor are perfectly aligned, preventing excessive wear and vibration.
A. Detailed Steps:
1. Prepare the Equipment: Ensure the pump and motor are properly supported and the coupling is accessible. Clean the coupling faces and remove any debris.
2. Prepare the Equipment: Ensure the pump and motor are properly supported, and the coupling is accessible. Clean the coupling faces and remove any debris.
3. Measure Misalignment: Use a chosen alignment method (e.g., dial indicators, laser alignment) to measure the initial misalignment.
4. Make Adjustments: Adjust the position of the pump or motor by shimming, moving the motor, or using jackscrews.
5. Re-measure and Verify: After adjustments, re-measure the alignment to ensure it is within acceptable tolerances.
6. Secure the Coupling: Once the alignment is verified, securely tighten the coupling bolts.
B. Methods of Measurement:
1. Dial Indicators: Dial indicators are used to measure radial and axial movement of the shafts, requiring mounting on the pump and motor shafts.
2. Laser Alignment: Laser alignment systems use lasers and sensors to precisely measure alignment, providing guidance on how to relocate and position the motor.
3. Straight Edge Alignment: This method involves placing a straight edge across the coupling faces to check for parallelism.
4. Rim-Face Dial Indicator Alignment: This method involves using dial indicators mounted on the coupling faces to measure alignment.
C. Important Considerations:
1. Thermal Expansion: Alignment should be verified after the machinery has operated under normal conditions, as thermal expansion can cause components to misalign.
2. Coupling Type: Rigid couplings require more precise alignment than flexible couplings.
3. Sequence of Adjustments: When using laser alignment, the order of adjustments (vertical, horizontal, and angular alignment) is important to avoid re-work.
4. Soft Foot: Correcting soft foot is a crucial step in the alignment process to ensure proper support of the pump and motor.

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