Ingersoll-Rand EP 20-ESP, Руководство оператора/инструкция по эксплуатации и перечень запасных частей

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20
ALIGN SHEAVES
Insure that the compressor is isolated from the
compressed air system by closing the isolation
valve and venting pressure from the drip leg.
Insure that the main power disconnect switch is
locked and tagged.
An easy and effective method of checking alignment in
both directions between the driver and driven sheaves
utilizes an accurate straightedge.
Lay the straightedge across the face of the driver
(motor) sheave and check alignment of the driven
(airend) sheave. Then lay the straightedge across the
driven sheave and check that the driver sheave is
aligned.
Alignment should be within 1/16” (1.6 mm) maximum
when measuring the gap between the straightedge
and the rim of the opposite sheave in each direction.
This alignment is factory set and should only require
resetting if the drive motor or airend is removed.
The following steps should be taken to insure proper
alignment of all components.
1. Remove the cooler corners and air deflector.
2. Holding the straightedge against the front of the
airend sheave, measure the amount of misalignment
seen on the motor sheave. If misalignment is less than
1/16” (1.6 mm) then reinstall cooler box outer panel
prior to operating unit.
3. If misalignment is more than 1/16” (1.6 mm), the
motor sheave bushing must be loosened for reposi-
tioning.
To reposition the motor sheave:
1. Remove drive belts (See Section 4.6).
2. Remove the three hex head screws that hold motor
sheave to sheave bushing. See Figure 4.5-3.
3. Lubricate the thread and end of screws that were
just removed.
4. Reinstall all three screws in the holes of the bushing
that are threaded.
5. Slowly tighten the three screws evenly until the
sheave is pressed from the bushing. (Light tapping on
bushing may assist removal.)
6. Remove the screws from the holes.
“A” - Clearance Holes
“B” - Threaded Holes
FIGURE 4.5-3 MOTOR SHEAVE BUSHING
7. Loosen allen screw in sheave bushing.
8. Move the bushing either in or out on the motor shaft
depending upon the measurement taken earlier.
9. Tighten allen screw in sheave bushing.
10. Being careful to not move the bushing on the
shaft, align sheave so that the three threaded holes in
the sheave line up with the three clearance holes in
the bushing.
11. Insert all three screws through clearance holes in
the bushing and thread into sheave.
12. Slowly and evenly tighten all sheave retaining
screws. Torque to 180 lb-in. (2.1 kg-m).
13. Tap against large end of bushing using hammer
and block or sleeve to avoid damage. Continue to
torque screws until the specified wrench torque no
longer turns the screw after tapping.
14. Install belts as shown in Section 4.6.
15. Recheck for proper alignment.
16. Reinstall cooler box air deflector and corners.
ALLEN HEAD SCREW
SHEAVE RETAINING SCREWS
B
B
B
A
A
A