2201Q4JE-MY-C9-N_2018.01.
Table of Contents
Compound 2-stage Screw Compressor 4032**C
viii
5.4.12 Rotors and Main Rotor Casing (Low-stage/High-stage) .................................... 5-30
5.4.12.1 Disassembly .............................................................................................. 5-30
5.4.12.2 Inspection .................................................................................................. 5-30
5.4.13 High-stage Bearing Head and Main Bearings ................................................... 5-31
5.4.13.1 Disassembly .............................................................................................. 5-31
5.4.13.2 Inspection .................................................................................................. 5-31
5.4.14 Low-stage Bearing Head and Main Bearings .................................................... 5-32
5.4.14.1 Disassembly .............................................................................................. 5-32
5.4.14.2 Inspection .................................................................................................. 5-32
5.5 Reassembly ................................................................................................ 5-33
5.5.1 Unloader Slide Valve ......................................................................................... 5-35
5.5.2 Bearing Head and Main Bearings ...................................................................... 5-36
5.5.3 Bearing Head and Rotor Casing ........................................................................ 5-37
5.5.4 Installing the Rotors ........................................................................................... 5-39
5.5.5 Suction Cover and Side Bearings ...................................................................... 5-40
5.5.6 Installing the Suction Cover ............................................................................... 5-41
5.5.7 Balance Piston and Balance Piston Sleeve ....................................................... 5-42
5.5.8 Thrust Bearing Block ......................................................................................... 5-43
5.5.8.1 High-stage Block ....................................................................................... 5-44
5.5.8.2 Low-stage Block ........................................................................................ 5-45
5.5.8.3 End Clearance Measurement .................................................................... 5-46
5.5.8.4 End Clearance Adjustment Procedure ...................................................... 5-47
5.5.8.5 Tightening after Finishing the End Clearance Adjustment ........................ 5-47
5.5.9 Balance Piston Cover and High-stage Unloader Cylinder ................................. 5-48
5.5.10 Bearing Cover .................................................................................................... 5-49
5.5.11 Shaft Seal Block ................................................................................................ 5-49
5.5.12 Low-stage Unloader Cylinder ............................................................................ 5-50
5.5.13 Unloader Cover .................................................................................................. 5-51
5.5.14 Coupling the High-stage and Low-stage Blocks ................................................ 5-52
5.5.15 Unloader Indicator ............................................................................................. 5-53
5.5.15.1 Potentiometer ............................................................................................ 5-53
5.5.15.2 Micro-switches and Micro-switch Cam ...................................................... 5-54
5.5.15.3 Reassembly ............................................................................................... 5-54
