ITT Goulds Pumps XHD, Инструкция по установке, эксплуатации и обслуживанию

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Commissioning, Startup, Operation, and Shutdown
XHD Installation, Operation, and Maintenance Manual 46
4. Back up the Impeller: Turn the two adjusting nuts (415A) on the rearward sides of the
bearing frame adjustment plates (234F) counterclockwise sequentially, 1/2 of a turn each at
a time, to draw the power end and impeller (101) backward until the face of the rear pump
out vanes of the impeller contacts the volute liner (561). Turn the shaft (122) clockwise to
ensure that there is contact between the impeller (101) and volute liner (561). Stop turning
the adjusting nuts (415A) when a firm drag is encountered.
5. Place and zero the indicator: Place the dial indicator so that the button contacts either the
shaft end, face of the coupling, face of the sheave bushing, or on the face of the bearing
end cover. Zero the indicator.
6. Loosen the two adjusting nuts (415A) on the rear sides of the bearing frame adjustment
plates (234F) that were tightened in step 4 above by turning them counter clockwise.
7. Move Impeller forward the sum of impeller back clearance plus the impeller front clearance
from table 7: Turn the two adjusting nuts (415A) on the forward sides of the bearing frame
adjustment plates (234F) clockwise sequentially, 1/2 of a turn at a time, to draw the power
end forward until there is a 2.54mm (.100 in) or 3.0 mm (.118 in) gap between the impeller
(101) and suction volute liner (561) as measured on the dial indicator.
8. Tighten the adjustment plate hold-down bolts (352G) and nuts (427D) that clamp the
bearing frame adjustment plates (234F) to the pedestal (131). Make sure that the dial
indicator reading remains at the proper setting. This will temporarily hold the frame in place
until step 15 is completed.
9. Loosen the three seal ring jam nuts (357B) by turning them counterclockwise.
10. Move Seal Ring to contact to the impeller: Turn the three square head adjusting bolts
(356F) sequentially counter clockwise, 1/3 of a turn each at a time, until the seal ring (822)
contacts the impeller (101) and is square with the wear surface of the impeller. Turn the
shaft (122) clockwise while performing step 10 to ensure there is contact between the seal
ring (822) and impeller (101). Stop turning the square head adjusting bolts (356F) when a
firm drag is encountered.
11. Tighten the seal ring adjusting bolt jam nuts (357B) by turning counterclockwise until the
nuts contact the suction casing (100A).
12. Loosen the adjustment plate hold down bolts (352G) and nuts (427D).
13. Loosen the two adjusting nuts (415A) on the forward sides of the bearing frame
adjustment plates (234F) by turning them counterclockwise.
14. Back up the impeller .51mm (.020 in): Turn the two adjusting nuts (415A) on the rearward
sides of the bearing frame adjustment plates (234F) sequentially clockwise, 1/2 of a turn
each at a time, to draw the power end backward until the impeller (101) dial indicator
measures the proper field setting impeller back clearance from table 7. To verify the correct
impeller to suction seal ring clearance has been made, a feeler gage can be inserted thru
the casing suction between the impeller (101) and seal ring (822) in 3 places to assure the
seal ring is square to the impeller face.
15. Tighten the adjustment plate hold-down bolts (352G) and nuts (427D) that clamp the
bearing frame adjustment plates (234F) to the pedestal (131). Make sure that the dial
indicator reading remains at the proper setting.