Flowserve IJ, Установка, эксплуатация и обслуживание

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
6-17 BO2660-01
CAUTION
During horizontal disassembly you may slightly lift the shaft
to take the weight of the rotor off of an impeller bushing or
wearing ring, making it easier to slide the impeller off of its
key. Do not lift the shaft enough to apply force to the cover
or spacer as this may bend the shaft.
4. At the discharge stage, proceed as follows:
a. Heat and remove the discharge impeller (34) using the procedure outlined in
INTERFERENCE FIT PART REMOVAL above. Remove the split ring (545) (if
installed) and impeller key(s) (25).
b. Remove the discharge spacer (36) using the procedure outlined in INTERFERENCE FIT
PART REMOVAL above.
5. At the next to last stage, and each successive stage (except the first stage) proceed as follows:
a. Heat and remove the impeller (34) or spacer sleeve (24) (if installed) using the procedure
outlined in INTERFERENCE FIT PART REMOVAL above. Remove the split ring (545)
(if installed) and impeller key(s) (25).
b. Remove the intermediate cover (33) or destaging spacer (292) (if installed) using the
procedure outlined in INTERFERENCE FIT PART REMOVAL above.
6. At the first stage, proceed as follows:
a. To prevent dropping the shaft in the channel after removing the suction spacer (23), place
two wooden blocks under the shaft to maintain its position. Place one block about 25% of
total shaft length from the free end, the other next to the suction spacer (23) on the free
end side of the suction impeller (28). Do not place blocks under the bearing journals on
the shaft.
b. Protect the coupling end of the shaft with gasket material. Then attach lifting gear to the
suction spacer (23), if necessary, and move it off of the coupling end of the shaft.
NOTE
To remove the suction impeller, it may be necessary to strike
the impeller skirt with two soft-faced mallets at points 180
degrees apart using simultaneous blows.
c. Heat and remove suction impeller (28) using the procedure outlined in INTERFERENCE
FIT PART REMOVAL above. Remove split ring (545) (if installed) and impeller key(s)
(25 or 112).
7. If required, set the shaft aside by placing nylon lifting straps under each end about 25% of
total shaft length away from the ends and lifting the shaft out of the V-blocks using one hoist
on each strap or one hoist and a spreader bar. The shaft must be stored on a flat, solid surface,
or wooden blocks, at least 6 inches (150 mm) above a metal or concrete surface.
6.5 PART CLEANING, INSPECTION, AND REPAIR
This subsection identifies conditions that commonly impair the serviceability of parts, which, if not
corrected could also impair operation and sometimes cause major damage. During your inspection,