mycom 3225MSC

2202MYJE-MY-C8-N_2018.02.
Table of Contents
Compound 2-stage Screw Compressor 3225**C
viii
5.4.10.1 Disassembly .............................................................................................. 5-29
5.4.10.2 Inspection .................................................................................................. 5-30
5.4.11 Low-stage Suction Cover and Side Bearings .................................................... 5-31
5.4.11.1 Disassembly .............................................................................................. 5-31
5.4.11.2 Inspection .................................................................................................. 5-31
5.4.12 Thrust Bearing Block ......................................................................................... 5-32
5.4.12.1 Disassembly of the High-stage Thrust Bearing Block ............................... 5-32
5.4.12.2 Disassembly of the Low-stage Thrust Bearing Block ................................ 5-33
5.4.12.3 Inspection (High-stage and Low-stage) ..................................................... 5-33
5.4.13 High-stage Rotors and Main Rotor Casing ........................................................ 5-34
5.4.13.1 Disassembly .............................................................................................. 5-34
5.4.13.2 Inspection .................................................................................................. 5-35
5.4.14 Low-stage Rotors and Main Rotor Casing ......................................................... 5-35
5.4.15 High-stage Bearing Head and Main Bearings ................................................... 5-36
5.4.15.1 Disassembly .............................................................................................. 5-36
5.4.15.2 Inspection .................................................................................................. 5-36
5.4.16 Low-stage Bearing Head and Main Bearings .................................................... 5-37
5.4.16.1 Disassembly .............................................................................................. 5-37
5.4.16.2 Inspection .................................................................................................. 5-37
5.5 Reassembly ................................................................................................ 5-38
5.5.1 Unloader Slide Valve and Guide Block .............................................................. 5-40
5.5.2 Bearing Head and Main Bearings ...................................................................... 5-41
5.5.3 Bearing Head and Main Rotor Casing ............................................................... 5-42
5.5.4 Installing the Rotors ........................................................................................... 5-43
5.5.5 Suction Cover and Side Bearings ...................................................................... 5-44
5.5.6 Balance Piston Sleeve ....................................................................................... 5-45
5.5.7 Installing the Suction Cover ............................................................................... 5-46
5.5.8 Thrust Bearing Block ......................................................................................... 5-48
5.5.8.1 End Clearance Measurement .................................................................... 5-50
5.5.8.2 End Clearance Adjustment Procedure ...................................................... 5-51
5.5.8.3 Tightening after Finishing the End Clearance Adjustment ........................ 5-52
5.5.8.4 Installing the Balance Piston ..................................................................... 5-53
5.5.9 Balance Piston Cover and High-stage Unloader Cylinder ................................. 5-53
5.5.10 Bearing Cover .................................................................................................... 5-56
5.5.11 Shaft Seal Block ................................................................................................ 5-57
5.5.12 Low-stage Unloader Cylinder ............................................................................ 5-60
5.5.13 Unloader Cover .................................................................................................. 5-61
5.5.14 Coupling the High-stage and Low-stage Blocks ................................................ 5-62
5.5.15 Unloader Indicator ............................................................................................. 5-64
5.5.15.1 Potentiometer ............................................................................................ 5-64
5.5.15.2 Micro-switches and Micro-switch Cam ...................................................... 5-64
5.5.15.3 Reassembly ............................................................................................... 5-65