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8-1
SECTION 8
SHAFT COUPLING
Figure 8- 1
– COUPLING COMPONENTS
Rotating machinery can cause personal injury or death. Turn the unit completely off,
open the main disconnect, lockout and tagout before servicing the coupling.
SHAFT COUPLING
– Main motors drive their companion compressors by means of curved jaw-type
couplings. Each coupling hub is fixed to the shaft with a setscrew and key combinations. The power is
transmitted through a meshing, single, dry, vibrations damping element
– see Figure 8-1, for details of the
main components.
The close-coupled arrangement of motor and compressor, through machined cast housing, provides
automatic alignment of shafts and coupling. The coupling assembly requires no lubrication.
Coupling Element (Rotex size 65) Inspection and Replacement:
1. Disconnect, lockout and tagout power supply to the compressor package.
2. Remove fasteners securing coupling guard to access opening on compressor-motor housing and
remove guard.
3. Depending on the bore-to-shaft fits (e.g., clearance or interference) on either of the coupling hubs
proceeds as directed. For hub-to-shaft clearance fit hubs:
Loosen setscrews fastening hubs to shafts and slide hubs away from each other to allow
removal of coupling element. Note that if the hubs do not slide on the shafts after this step, they
should be considered interference fitted, thus proceed directly to Step 4, for further removal
instructions.
Inspect coupling element for signs of wear and tear such as indentations, cracks, deformation,
extrusions, etc. Replace, if necessary.
After engaging each hub on the matching recesses of the coupling element, check that the gap
between the hub flats (see dimension “E” on Figure 8-2) is within 1.38/1.50 in (35/38 mm).
Summary of Contents for AirSmart VS80-110B
Page 33: ...13 18 612 Page 32 4 7 300CGE546 04 Ref Drawing Page 2 of 4...
Page 34: ...13 18 612 Page 33 4 8 300CGE546 04 Ref Drawing Page 3 of 4...
Page 35: ...13 18 612 Page 34 4 9 300CGE546 04 Ref Drawing Page 4 of 4...
Page 37: ...13 18 612 Page 36 4 11 301CGE546 B Ref Drawing Page 2 of 4...
Page 38: ...13 18 612 Page 37 4 12 301CGE546 B Ref Drawing Page 3 of 4...
Page 39: ...13 18 612 Page 38 4 13 301CGE546 B Ref Drawing Page 4 of 4...
Page 41: ...13 18 612 Page 40 4 15 302CGE546 05 Ref Drawing Page 2 of 4...
Page 42: ...13 18 612 Page 41 4 16 302CGE546 05 Ref Drawing Page 3 of 4...
Page 43: ...13 18 612 Page 42 4 17 302CGE546 05 Ref Drawing Page 4 of 4...
Page 45: ...13 18 612 Page 44 4 19 303CGE546 B Ref Drawing Page 2 of 4...
Page 46: ...13 18 612 Page 45 4 20 303CGE546 B Ref Drawing Page 3 of 4...
Page 47: ...13 18 612 Page 46 4 21 303CGE546 B Ref Drawing Page 4 of 4...
Page 70: ...13 18 612 Page 69 9 2 Figure 9 1 MINIMUM DISCHARGE PRESSURE CHECK VALVE...
Page 86: ...NOTES...
Page 87: ...NOTES...