2200M4JE-HO-iS2-N_2014.04.
Chapter 5 Maintenance
Screw Compressor i-series
5.6 Reassembly
5-30
g) By using two seal collar set screws
【
111
】
, tighten the seal collar against the countersunk holes in
the rotor shaft. Tightening the seal collar at other places than the countersunk holes can cause
damage to the rotor shaft which can lead to leakage.
h) Assemble O-ring
【
103
】
for mating ring and mating ring
【
101
】
to seal cover
【
51
】
.
Photo 038
Tightening Seal Collar Set Screws Photo 039
After Assembly of Mating Ring
i) Apply oil to seal cover gasket
【
52
】
, align the gasket oil hole with the bearing cover oil hole, and
affix gasket to the flange.
* The i-series compressors employ the standard internal oil supply type. With this type, the bearing
cover and the seal cover are connected by drilled oil supply holes. Oil flows through the notch in
seal cover to upper side of seal cover, and then goes through the drilled oil supply holes to the
sliding surfaces of mechanical seal assembly.
j) Install the seal cover with the gasket, so that the oil removal piping of the seal cover is on the bottom
side.
At this time, assemble it carefully, either at a right angle or by delaying the upper side slightly, while
paying attention not to cause the mating ring inside the seal cover hit against the rotor shaft.
The seal collar and the mating ring sliding surface will come into contact midway through
attachment.
At this moment, check the dimensions between the seal cover gasket and the bearing cover flange
surface by using a taper gauge. This value is called tightening allowance for seal.
It is used when checking the sliding face pressure between the rotating ring and fixed ring of the
seal. If this value is not within the range shown in Table 5-17, measures should be taken, such as
replacement of mechanical seal assembly or addition of another gasket.
With i-series compressor, the thickness of the seal cover gasket is 0.5 mm.
Table 5-17
Tightening Allowance for Seal
Seal Bearing cover
Cover
* The hatched portion represents gasket.
Photo 040
Figure 5-5
Checking Tightening Allowance
Checking Tightening Allowance
Model
BBSE seal
i125
2.0 to 3.0
i160
2.0 to 3.0
Taper gauge
