Fig. No.
12
top shaft
dial indicator
drive plate
Fig. No.
13
top view
12 of 10
Subject to change without prior notice
INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
VERTICAL TURBINE PUMP - NVT SERIES
Ref. No. NVT-IOM/2020/V.01
5.7. Drive Shaft Alignment
Make sure that the engine crank shaft / motor shaft center line is on the same center line as the right angle gear drive shaft
when examined from the top view (Fig. No.
13
) and parallel in the side view (Fig. No.
14
).
The cause of misalignment should be corrected before proceeding further with the installation.
Universal joint operating angles at each end of a drive shaft should always be at least
1
°. At the same time this deflection angles
θ
1
and
θ
2
must be equal within ±
0
.
5
°. Shaft yokes must be aligned in phase (Fig. No.
15
).
The maximum joint operating angle of
3
° is recommended for optimum bearing life. Parallel offset is the recommended
method for achieving the desired angle. Measure the distance “A” and “B” as shown in the Fig. No.
16
(same unit). If the ratio
between “A” and “B” (A/B) is between
0
.
0175
and
0
.
0524
then the angle will be approximately between
1
° and
3
°.
Engine crank shaft / motor shaft center line and right angle gear drive shaft center line should be parallel in side view as
