Up-thrust and Seal Failures on a Vertical Can Pump
Abstract
Pine Bend, MN, 12x10, 9 stage vertical can pump, 600 hp, 1780 rpm
A new smaller, higher efficiency motor was installed to replace the old motor and shortly after numerous mechanical seal failures occurred. The motor is a solid shaft motor that is connected to the pump with a rigid coupling.
The motor hub is connected to the motor shaft with a split ring. On startup it was observed that the pump shaft would move about 3/8 inch upward and the mechanical seal would leak.
Description
Case StudySubject
Pumping machineryCollections
Citation
Bill, Litton; Smith, Brett; McBroom, Brian (2018). Up-thrust and Seal Failures on
a Vertical Can Pump. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from https : / /hdl .handle .net /1969 .1 /174982.