Page 92 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

Installation, Maintenance, and Repair of %rtical Pumps 77

Deepwell Pump Shaft Adjustment
Details of the upper portion of a hollow shaft motor are shown in Fig-
ure 2-8. To adjust the axial position of a deepwell pump rotor:

1. Tighten the adjusting nut until the shaft starts to turn. This is an
indication that the shaft has stretched to compensate for the weight
of the rotor and that the impellers have lifted clear of the bowls.

2. Engage the locking arm or otherwise hold the self release coupling
against rotation. As the coupling is keyed to the shaft, the shaft is
also held against rotation.

Figure 2-6. Totally enclosed fan-cooled ver- Figure 2-7. Weather-protected type I (WPI)
tical solid shaft normal thrust motor. (Cour- vertical hollow shaft high thrust motor.
tesy US. Electrical Motors Division, Emer- (Courtesy US. Electrical Motors Division,
son Electric Company.) Emerson Electric Company.)