2205Q2JE-HO-S6-N_2020.01.
Chapter 5 Maintenance and Inspection
SCV-series Screw Compressor 5.5 Reassembly
5-39
5.5.6 Installing the Suction Cover
a) Turn the Vi adjusting rod counterclockwise to set it to the L port position.
b)
Apply oil on both sides of the gasket [6], and attach it to the main rotor casing [1] while carefully
checking the position of oil supply holes. Screw in stud bolts to the main rotor casing to retain the
gasket in position.
As the gasket of the suction cover is not symmetrically shaped, take care the gasket
direction when attaching to the main rotor casing.
c)
Slide (or use a lifting device to move) the suction cover [5] in parallel along the shaft axis, and align
the unloader push rod [67] with the O-ring gland [325] in the suction cover.
d)
Then, engage the shaft ends of the rotors with the side bearings while pushing the suction cover
gradually. At this time, be careful not to damage the inner surfaces of the side bearings.
Sliding the Suction Cover on the Workbench Using a Crane and pushing to ･･･
e)
After the suction cover has been pushed in up to the flange surface of the main rotor casing, lightly
fasten some of the hexagon socket head cap screws [2].
f) Using a copper hammer or an aluminum hammer, drive in the alignment pins [3].
g)
Tighten the hexagon socket head cap screws evenly up to the specified tightening torque. The bolts
on the bottom side (about 6 bolts) are to be tightened during the final assembly stage, on the special
stand used in the disassembly process.
h) Check that the unloader slide valve and variable Vi auxiliary slide valve can be moved smoothly.
Also, hold and rotate the M rotor shaft to check if it works normally.
In addition, check that the rotor has an axial play (i.e., the rotor can move in the axial direction).
Tightening the Bolts using a Torque Wrench In case of Large sized Models,
use a Hydraulic Torque Wrench
To Next Page
Loading...
Need help?
General
