37-1-614 Page 42
FIGURE 7- 5 – ANGULAR CONTACT BEARING
ASSEMBLY
FIGURE 7-6 – BEARING INSTALLATION
NOTICE
If rotors are installed in reverse of above instructions, the gate rotor bearing spacer O.D. may
drag on the main rotor lobe and be damaged.
The CycloBlower is designed for no metal-to-metal contact
with parts within the housing. To achieve
this, some preliminary measurements are necessary before completing the assembly.
The first set of
measurements are used to determine the shaft shim set thickness necessary for positioning the
rotors in the housing to give the required clearance between the end of the rotors and the carrier
face at the discharge end.
End clearance is maintained at the discharge end by two angular contact
bearings (29, 30), bearing spacer (16, 17) and shim set (22, 23). The shaft shim set is determined as
outlined in Steps 5 thru 8.
5. The angular contact bearings (29, 30) must be assembled as shown in (FIGURE 7- 5) to assure a
“fixed” bearing. The marked face of the inner bearing is placed down in the bearing bore; the
marked face of the outer bearing is placed up.
6. Install the shaft seal (18, 19), and fit the bearing spacers (16, 17) in the discharge end bearing
carrier (5) using the same method as outlined in Steps 1 and 2, page 40 and 41. To prepare for
shim set measurement, slip bearings (29, 30) into the bore and install bearing retainer plate
(11, 12), FIGURE
7-6
.
Bearings must be assembled as directed in Step 5
. Bearings are slip fit
in the bore.
7. Inspect bearing spacers for burrs on either end and polished area of O.D. Slip bearing spacer
through the shaft seal with the polished end toward the bearing. Make sure the spacer is resting
solidly against the bearing. With depth micrometer, measure the distance from the face of the
carrier to the end of each of the bearing spacers, FIGURE 7-7, page 42.
FIGURE 7-7 – DISCHARGE END BEARING CARRIER
