Flowserve IJ, Установка, эксплуатация и обслуживание

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
6-25 BO2660-01
WEARING SURFACE above), the standard size bushing should be used for replacement. A bushing,
whether standard or undersize, is manufactured to be pressed into the parent part. The following
procedure will guide you in replacing a bushing.
CAUTION
Striking or cutting into metal of parent part will make
replacement necessary.
1. Machine off, or using rotary file grind off, welds that retain keys to metal of parent part or
that retain bushing directly to parent part.
2. Press out or using aluminum drift (or equivalent), knock out bushing .
3. See that requirements under VISUAL INSPECTION above which apply to bushings are
complied with.
4. See that temperature of parent part is above 70°F (21°C).
CAUTION
Do not bind or otherwise cause undue stress on bushing.
5. Sub-cool bushing in Dry Ice to shrink it; then, bottom bushing squarely in bore of parent part
by using aluminum drift and mallet to strike evenly around circumference of bushing.
6. Determine that bushing and parent part have warmed to ambient temperature by feeling with
hand.
7. If the replacement bushing has not been furnished with finish stock left on the running
surface, then verify trueness of wearing-ring-to-part fit as outlined below or by an equivalent
technique:
a. Set part face down on table of vertical lathe and parallel with face of table.
b. Align centerline of part with centerline of table using register face of part as true side of
dial indicator; alignment shall be within limit given in OPERATING SPECIFICATIONS.
c. Clamp around part to hold it in centered and parallel position.
d. Set up dial indicator to run on inside diameter of bushing and rotate table; total runout
shall not exceed maximum given in OPERATING SPECIFICATIONS.
8. Install new keys and tack weld them to metal of parent part using gas-tungsten arc and
appropriate wire. Note: some installations use interference fit only to secure ring. Then repeat
step 7.
9. If the replacement bushing has been furnished with finish stock left on the running surface,
true cut the wearing ring using the following procedure, or an equivalent:
a. Center the parent part on a vertical lathe by following steps 7.a. through 7.c. above.
b. Machine the finish stock from the inside diameter of the wearing ring to meet the
clearances specified in OPERATING SPECIFICATIONS.
10. Verify trueness of wearing-ring-to-part fit as outlined in step 7. above .
11. See that there is no damage to the wearing surface.