What is Alignment?
It is the process of positioning two (or more) machines that are coupled, so that Center lines of rotating shafts form a single line, when the machines are working at normal operating temperature.
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Causes Of Misalignment
Thermal expansion - Most machines align cold.
Machine vibrations.
Forces transmitted to the machine by pipe or
support structure.
Soft foot.
Direct coupled machined are not properly aligned.
Poor workmanship.
Effects Of Misalignment
More than 50% problems are due to misalignment.
Causes vibration on the machine
Vibration destroys critical parts of machines like bearings, gears, seals, coupling etc.
Breaks lubricant film inside the bearing and increase friction.
Increases load on the bearing.
Increase 2 - 17% power consumption.
Generates heat inside the coupling.
Types Of Misalignment
1. Off set
2. Angular
3. Skew - Combination of offset & angular
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