2202L5JE-DA-C5-N_2015.05.
5 Maintenance and Inspection
Compound 2-stage Screw Compressor 5.4 Disassembly and Inspection
1612LSC Speed Increaser Type
5-13
5.4 Disassembly and Inspection
Generally, compressors are disassembled in the order shown in Figure 5-1 Illustrated Disassembly
Sequence but the order in the figure is just an example and the actual order may differ according to
individual situations.
For instance when overhauling it is no problem to start separation of high-stage part from low-stage
part after removing the compressor from the unit frame and putting it on the work bench prepared
beforehand.
In addition, it is often the case that the disassembly of unloader cover/unloader cylinder part from
mechanical seal part is performed in the reverse order of shown in the Figure 5-1.
Shown in the steps in the Figure 5-1,
① through ⑤ ,⑩ and ⑪, you can disassemble the
compressor with the compressor attached on its frame.
When conducting steps
⑦ through ⑲, the compressor should be removed from its frame and placed
on a work bench prepared in advance.
When disassembling high-stage or low-stage side only, start from step ⑦ and disassemble necessary
parts only.
Parts that have no problem should be left as they are. Do not disassemble such parts unless during
periodic inspection.
Since it is difficult to completely eliminate the risks of performing inaccurate work at the field,
disassemble the minimum required parts only.
Table 5-6 Disassembly Order of Compressor (examples)
Part for Disassembly
Disassembly Order
(Refer to Figure 5-1)
(1) Shaft seal block
①－②
(2) Unloader indicator
③
(3) Unloader cylinder cover
③－④
(4) Unloader piston and unloader cylinder
④
(5) Speed increaser gear casing cover
③
(6) Speed increaser gear casing
⑥
(7) Separating high-stage and low-stage
⑦
High-stage
(8) Gear coupling
⑦－⑧
(9) Thrust bearing
⑦－⑧－⑨
(10) Balance piston cover
⑩－⑪
(11) Balance piston
⑩－⑪
(12) Suction cover casing and main bearing
⑩－⑪－⑫
(13) Rotor and main rotor casing
⑬－⑭
(14) Bearing head and main bearing
⑭
Low-stage
(15) Thrust bearing
⑮
(16) Gear coupling
⑯
(17) Suction cover casing and side bearing
⑰
(18) Rotor and main rotor casing
⑱－⑲
(19) Bearing head and main bearing
⑲
(20) Unloader slide valve and guide block
⑲
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