mycom SCV Series User Manual

2205Q2JE-HO-S6-N_2020.01.
Chapter 5 Maintenance and Inspection
SCV-series Screw Compressor 5.4 Disassembly and Inspection
5-28
5.4.8 Thrust Bearing Block
[160 to 250V**] [320V*D]
Figure 5-12 Exploded Views of Thrust Bearing Block
Table 5-7 Parts Configuration of Thrust Bearing Block
●
The thrust bearing block of 250V** models and 320V*D models have no spacer for the thrust bearing
outer race. While the thrust bearing outer race spacer [41]
is used to support (i.e., ensure a sufficient
support width for) the outer race of the thrust be
aring, 250 or higher models use no spacer for the
thrust bearing outer race because the bearing head has sufficient margin to the support it.
● The thrust bearing block of 320V*D models is using an oil supply spacer
for the combined surface.
This is to facilitate lubrication of the ball bearing because as the rotor
diameter becomes larger, the
rotor shaft diameter become larger. Thus, a larger thrust bearing is
required and the ball rotation
speed increases accordingly.
●
Only 320V*D models employ O-ring [150] to thrust bearing gland.
5.4.8.1 Disassembly
a) Remove the lock nut [39] that has been loosened. Then, remove the torsional slip washer [237], lock
washer [40], and thrust washer [250].
b) The clearance fit is applied to two gaps between the outer race of the thrust bearing and the bearing
head, between the inner race of the thrust bearing and the rotor shaft.
Prepare a 1 or 2 mm diameter wire, make the tip of the wire flat by hammering, and slightly bend the
tip to make a hook. Then, insert the tip of the wire between the outer race and the ball retainer of the
thrust bearing [38] to hook and pull out the bearing. In this way, the bearing can be easily removed.
P/N Part Name
Qty
160V
200V
250V
320V
38
Thrust bearing
2
2
2
2
39
Lock nut
2
2
2
2
40
Lock washer
2
2
2
2
41
Spacer, Thrust bearing outer race
2
2 - -
42
Spacer, Thrust bearing alignment
2
2
2
2
43
Thrust bearing gland
2
2 2 2
45
Hexagon head bolt
8
8
8
8
46
Conical spring washer 8
8 8 8
150
O-ring -
- - 2
237
Torsional slip washer
2
2
2
2
250
Thrust washer
2 2 2 2

mycom SCV Series Specifications

General

Brand	mycom
Model	SCV Series
Category	Air Compressor
Language	English