2200M4JE-HO-iS2-N_2014.04.
Chapter 5 Maintenance and Inspection
Screw Compressor i-series
5.5 Disassembly and Inspection
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5.5
Disassembly and Inspection
When handling heavy objects, exercise extreme care and use apparatus such as
crane as necessary. There is a risk that the compressor's main body or parts may
drop on human body.
Be careful with handling of the parts during disassembly and inspection. Since the compressor rotates
at a very high speed, even the slightest handling error could cause a situation that requires
replacement of the rotor and all other important parts. Such errors can also cause problems or
performance deterioration after the compressor is reassembled. Be sure to fully understand the
following before starting the work.
5.5.1 Mechanical
Seal
Mechanical seals have a precisely machined sliding surface and are made of fragile material.
Handle them with special care since leakage may occur if damaged.
5.5.1.1 Disassembly
a) Of the eight hexagon socket head cap screws securing the seal cover
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, remove six and leave
the two on the opposing sides.
b) Loosen the remaining two screws alternately and evenly, a little at a time. After a certain amount of
loosening, the seal cover of the mechanical seal will be pushed by the repulsion force of the bellows
and a gap will appear. A gap will not appear if the gasket is stuck. In that case, remove the seal
cover; push the seal cover by screwing M8 eye bolts into the forcing screw holes.
c) Use a container to catch the oil that will leak from the gap in the seal.
d) Pull out the seal cover, while keeping it parallel with the shaft (rotor shaft). The mating ring is
attached inside the seal cover by using an O-ring
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. Be careful not to let the mating ring
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and the shaft damaged by contact.
e) Remove the O-ring
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from between the seal cover and seal retainer
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.
Photo 001 Removing Seal Cover
Photo 002 Seal Cover and Mating Ring
f) After removing the seal cover, wipe clean and inspect the shaft surface. If there are scratches, use
fine sandpaper to smooth them over. This is done to prevent damage to the internal O-ring when
pulling out the mechanical seal.