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RESEARCH PAPERS

Cage Instabilities in Cylindrical Roller Bearings

[+] Author and Article Information
Niranjan Ghaisas, Carl R. Wassgren, Farshid Sadeghi

585, Purdue Mall, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288

J. Tribol 126(4), 681-689 (Nov 09, 2004) (9 pages) doi:10.1115/1.1792674 History: Received September 09, 2003; Online November 09, 2004; Revised May 02, 2006
Copyright © 2004 by ASME
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References

Figures

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DBM model for friction coefficient as a function of slip velocity
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Geometric clearances in an inner-race guided cylindrical roller bearing
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Cage center-of-mass orbits for a 0 μm internal clearance
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Cage center-of-mass orbits for a 20 μm internal clearance
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Cage instability versus clearance ratio for varying internal clearance
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A schematic demonstrating the Kingsbury cage-whirl model 2. (a) and (b) show the cage at two whirl positions separated by 90°
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Cage-race normal forces for a 0 μm internal clearance
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Ratio of standard deviation of cage-race normal force to the mean force versus clearance ratio
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Frequency content of the cage-race normal forces shown in Fig. 7
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Cage instability versus clearance ratio for varying internal clearance with 1 mrad inner-race misalignment.
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Cage instability versus clearance ratio for varying internal clearance (inner-race rotational speed is 10,000 rpm)
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Cage center-of-mass orbits for a 7.5 μm internal clearance (inner-race rotational speed is 10,000 rpm)
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Cage instability versus clearance ratio for varying internal clearance with one roller radius 0.3% larger than the others
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The inner-race center-of-mass trajectory for a no-internal-clearance bearing (left) with all rollers of the same size and (right) with one roller of radius 0.3% larger than the others. Note that the scales of the figures are different.
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The inner-race center-of-mass trajectory with one roller of radius 0.3% larger than the others for four internal clearances. Note that the scales of the figures are different.
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Cage instability versus clearance ratio for varying internal clearance with one roller radius 0.3% smaller than the others
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The inner-race center-of-mass trajectory for a no-internal-clearance bearing (left) with all rollers of the same size and (right) with one roller of radius 0.3% smaller than the others. Note that the scales of the figures are different.

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