ITT Goulds Pumps 3409, Инструкция по установке, эксплуатации и обслуживанию

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4.3.1 Alignment checks
When to perform alignment checks
You must perform alignment checks under these circumstances:
• The process temperature changes.
• The piping changes.
• The pump has been serviced.
Types of misalignment
Type of misalignment Description
Angular misalignment Shafts have an axis concentric at the intersection but not parallel.
Parallel offset misalignment Shafts have an axis parallel but offset.
Check and correct angular misalignment before correcting parallel misalignment.
Permissible coupling misalignment
Type of misalignment Single element coupling Double element (spacer) coupling
Parallel misalignment 0.1 mm | 0.004 in. TIR (4 mils) 1.52 mm | 0.060 in. TIR per foot of spacer
length
Angular misalignment 0.1 mm | 0.004 in. TIR per inch of radius. 0.51 mm | 0.002 in. TIR per inch of radius
Types of alignment checks
Type of check When it is used
Initial alignment (cold alignment)
check Prior to operation when the pump and the driver are at ambient temperature.
Final alignment (hot alignment) check After operation when the pump and the driver are at operating temperature.
To make the final alignment, move and shim the motor on its base until the coupling hubs are within the
recommended tolerances measured in total runout. Take all measurements with the pump and driver
bolts tightened. Make the final alignment check after the unit has attained its final operating temperature.
Initial alignment (cold alignment) checks
When Why
Before you grout the baseplate This ensures that alignment can be accomplished.
After you grout the baseplate This ensures that no changes have occurred during the grouting process.
After you connect the piping This ensures that pipe strains have not altered the alignment.
Final alignment (hot alignment) checks
When Why
After the first run This ensures correct alignment when both the pump and the driver are at op-
erating temperature.
Periodically This follows the plant operating procedures.
4.3 Pump-to-driver alignment
22 Model 3409 Installation, Operation, and Maintenance Manual