Instruction book for compressor type HV2/200
Page 18
5.6 Elastic coupling
The compressor flywheel acts as one of the coupling halves.
Disassembling the coupling:
A
Loosen the nuts on each coupling half and tap these sharply with a hammer before removing the nuts
completely. This will cause the bolts to loosen from the conical holes in the coupling halves.
B
Remove the bolts and withdraw the coupling plate. Avoid getting oil on the coupling plate.
The coupling half on the motor is attached by shrinking onto the shaft and is located in a keyway.
Alignment:
The principle and dimensions for alignment are illustrated in Figure 5.3.
Tolerance:
Parallel (A1) ±0.05
mm
Angular (A2) ±0.05
mm
W=47±1 mm
Fig. 5.3 Alignment
A
Micrometer gauge
B
Magnetic base
C
Flywheel
D
Motor half coupling
E
Coupling plate
F
Dividers
The distance W should be checked with dividers or
vernier
calliper.
The
parallel displacement (A1)
between the two halves of the coupling is checked with a micrometer gauge on
a magnetic base around the circumference of the coupling half (D).
The
angular displacement (A2)
is checked with a micrometer gauge on a magnetic base around the
circumference of the flywheel.
Over/under and side/side measurements are made. The deviation in both parallel displacement and angular
displacement shall not exceed ±0.05 mm from side to side when the flywheel is rotated 180°.
