February 7, 2012
Align a Cooling Tower in Under an Hour
By Stan Riddle
Aligning cooling towers with spacer shafts can sometimes present a challenge. We recently provided alignment training and assistance to the HVAC Group at the Federal Reserve Bank in Richmond, VA.
This was a Marley cooling tower, with a 60 HP motor, connected to the gearbox by a 48″ spacer shaft.
That’s me, the trainer, inside the fan. The mechanics are using their Fixturlaser XA, and telling me how to shim up their gearbox. How often do you get that from a trainer?
The motor had recently been changed to an inverter-duty motor, in preparation for installing variable speed drives on this tower.
The initial measurements showed that the motor was sitting about 1/8″ too high. There were no shims under the motor, so it could not be easily lowered.
Using Live Mode, and employing the Verti-Zontal process, we shimmed the gearbox up vertically to correct a base-bound problem, twisted it horizontally a bit to correct a bolt-bound problem on the motor, and completed vertical shimming of the motor to align it to the gearbox.
Total time to align – 22 minutes!
Align a cooling tower – in under an hour? That’s Verti-Zontal power!