Rotech ANSI LTR, Инструкция по установке, эксплуатации и обслуживанию

Страница: 40 / 52

36
ramp begins. (See Figure 13)
2. Outboard Isolator (332A). Position the bearing housing
(134) outside flange up. Place the isolator in the bore and
press into place using the same technique as in Step 1
above.
3. Lightly lube the sleeve end of the shaft and rotor drive
ring. Slide the bearing frame (228) or adapter (108) over
the shaft per assembly instructions.
4. To assemble the outboard end, tape the shaft (122)
keyway with black tape. Lube the tape and rotor drive
ring. Slide the bearing housing (134) over the shaft (122)
end and continue per assembly instructions.
Make sure expulsion port and lube return are in
the 6 o’clock position in final assembly.
DISASSEMBLY PROCEDURES
1. Remove shaft assembly (122) per instructions for
pump disassembly. (See page 18)
2. STR removal. Insert a bar (wood or plastic) through the
outboard bearing housing end of the bearing frame (228).
Contact the inboard bearing isolator (333A). Remove by
tapping the bar or pushing with an arbor press.
MTR and XLR removal. Disassemble the bearing
frame adapter (108) per pump disassembly instructions.
Remove the inboard bearing isolator (333A) with a bar
(wood or plastic) by tapping or by pushing with an arbor
press.
3. STR, MTR, and XLR outboard bearing isolator (332A)
removal. Block up the outboard bearing housing (134) on
the bench, coupling the end toward the bench top. Tap
the isolator out of the housing or use an arbor press.
4. Inspect the bearing isolators. If the unit pulls apart, a
new isolator is needed for reassembly.
5. Replace the rotor 0-rings and stator 0-rings each time
the units are removed from the pump assembly.
INSTALLATION PROCEDURES
1. STR, MTR, and XLR Inboard Isolator. Position the
bearing frame (228) or adapter (108) inboard bearing side
up. Place the isolator seal (333A) stator side in the bore.
THE EXPULSION PORT MUST BE IN THE 6 O’CLOCK
POSITION. While using a block large enough to cover the
entire flange of the isolator, use an arbor press to press
the stator into the bore. Press into place until the location
APPENDIX 3
MAINTENANCE INSTRUCTIONS FOR INPRO/SEAL® “VBX” BEARING ISOLATORS
Details of Operations
The Inpro Bearing Isolator is a Labyrinth type seal, which performs two functions:
1. Maintains the clean oil in the bearing housing.
2. Keeps contaminates from entering the bearing housing.
The unit is comprised of three major components: the rotor, the stator, and the “VBX” ® ring.
The rotor fits over the shaft and is held in place by an elastometric drive ring. The drive ring causes the rotor to turn with the
shaft and also provides a positive static seal on the shaft. There is no metal-to-metal contact between the shaft and rotor,
thus no wear and friction concerns.
The stator is held in the housing by a nominal .002" interference fit. An o-ring gasket on the outside diameter of the stator
secures a positive seal between the stator and the housing bore. The designed Labyrinth grooves and lube return trough on
the stator inside diameter retains the lubricant inside the bearing housing.
The rotor and stator act together to keep contamination out of the bearing housing.
The “VBX” ® ring, stator, and rotor are a unit and must not be pulled apart. If the unit is pulled apart or comes apart, it must
be replaced with a new unit. The “VBX” ® is intended to be an inseparable design.
Repairs or replacement of seals are only necessary if excessive oil leakage is visible. If or when the bearing housing is disas-
sembled, it is recommended that the rotor orings be replaced.
2
9
“VBX” O-Ring Action
1. Rotor
2. Stator
3. ‘VBX’ Ring
4. Rotor drive ring
5. Stator gasket
6. Expulsion port
7. Labyrinth groove
8. Lube return
9. Location ramp
1
7
8
4
3
6
5
Fig. 13
Static Dynamic