Rotor Outline drawing. Spider cross-section next page. Weight is 4000 pounds.

New Rotor Spider Section Z-Z. Diametral area moment of inertia calculated on eng-tips link: http://www.eng-tips.com/viewthread.cfm?qid=274310

3.62

5”3.

625”

End view of installed rotor

Side view of rotor

Model used for calculation

L1=22 inchI1 = 135.6 inch^4Mu1=12 lbf/inch

L2=25 inchI2=953 inch^4Mu2=69.6 lbf/inch

L1I1mu1

L2I2mu2

Shaft Spider/Core

LIN

E O

F S

YM

ME

TR

Y (Mirror image)

Mu1 Mu2 Mu2 Mu1

Analysis. Double-click to open pdf. Plots on pages 8 and 9

Results:Slope at bearing due to weight of rotor isSlope = -0.00015

For bearing length of 4.5”, this is approx 0.7 milChange in elevaation.

Since clearance is 6 mils, this is approx 11% of Bearing clearance.

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