Cages used for supporting bearings in an aero engine have been tested under simulated operating conditions. Failures of these bearing cages were recorded after the following engine running hours: 1420, 940, 2620, 705, 360, 1185, 1410, 1950, 2730, 2050, 525, 1465, 925. The total number of bearing cages tested was 64. The remaining 51 cages did not fail by the time the tests were stopped at 2730 hours. Determine: (a) the minimum life. (b) the characteristic life (after the minimum life), to the nearest 100 hours*. (c) the shape factor. From this, comment on the nature of the failure of these bearing cages.
Cages used for supporting bearings in an aero engine have been tested under simulated operating conditions. Failures of these bearing cages were recorded after the following engine running hours: 1420, 940, 2620, 705, 360, 1185, 1410, 1950, 2730, 2050, 525, 1465, 925. The total number of bearing cages tested was 64. The remaining 51 cages did not fail by the time the tests were stopped at 2730 hours. Determine: (a) the minimum life. (b) the characteristic life (after the minimum life), to the nearest 100 hours*. (c) the shape factor. From this, comment on the nature of the failure of these bearing cages.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Cages used for supporting bearings in an aero engine have been tested under simulated
operating conditions. Failures of these bearing cages were recorded after the following
engine running hours:
1420, 940, 2620, 705, 360, 1185, 1410, 1950, 2730, 2050, 525, 1465, 925.
The total number of bearing cages tested was 64. The remaining 51 cages did not fail by
the time the tests were stopped at 2730 hours. Determine:
(a) the minimum life.
(b) the characteristic life (after the minimum life), to the nearest 100 hours*.
(c) the shape factor. From this, comment on the nature of the failure of these bearing cages.
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