Flowserve IJ, Установка, эксплуатация и обслуживание

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
6-23 BO2660-01
NOTE
Rotating parts must be at room temperature when
performing step 5.
5. With bearing surfaces in soft-faced V-blocks (or equivalent), rotate element and take readings
with dial indicator at several place on shaft, center of pressure reducing sleeve, and surfaces
of each impeller hub and skirt. Verify that total runout does not exceed maximum given in
OPERATING SPECIFICATIONS.
CAUTION
Should total runout exceed maximum given in OPERATING
SPECIFICATIONS, the cause must be determined before
proceeding further. Usually excessive runout is caused by a
wrong part or improper assembly procedure .
6. With concentricity of rotating assembly verified and with rotor still in V-blocks, strip the
shaft by following the instructions and sequence from PUMP DISASSEMBLY: INTERNAL
ASSEMBLY above.
6.5.2.6.6 Renewing Impeller Wearing Surfaces
If the impeller is not equipped with a wearing ring, the skirt and hub wearing surfaces may be ground
lightly to restore concentricity; however, to provide assurance that the design features of the impeller
are retained and that pump operation will not be impaired by the renewing process, there are
conditions to meet:
1. The original diameter of skirt or hub must never be decreased by more than maximum
decrease given in OPERATING SPECIFICATIONS.
2. The impeller bore must be true (see CHECKING FIT OF IMPELLER AND BALANCING
DRUM WITH SHAFT above) and must be perfectly centered while grinding so that skirt and
hub wearing surfaces run true to shaft bore. The surface shall be finished as specified in
OPERATING SPECIFICATIONS.
3. The impeller must be dynamically or two-plane balanced. To achieve balance, metal should
be ground off the outside surface of the shroud but to avoid weakening the shroud, not from
one spot.
4. New undersized stationary wearing rings and bushings must be installed to maintain the
proper running clearance (see CHECKING RUNNING CLEARANCES above). For details
about obtaining undersized parts from Flowserve, see PART ORDERING AND SERVICING
INFORMATION.
5. A record should be kept of the decrease in skirt and hub diameters and the undersize of
wearing rings and bushings.
6.5.2.6.7 Replacing Stationary Wearing Rings
The instructions in this paragraph apply to replacement of wearing rings in stationary parts. Unless
the impeller skirt wearing surface has been, or is to be, ground down (see RENEWING IMPELLER
WEARING SURFACES above), a wearing ring with finish stock left on the running surface, or the
standard size wearing ring, should be used for replacement. A wearing ring, whether standard or
undersize, is manufactured to be pressed into its parent part. The following procedure will guide you
in the replacement of a wearing ring: