Material testing for a bearing inner ring
AssigneePratt & Whitney Canada Corp.
InventorsKatarzyna Sekowska, Maciej Piotrowski
Life of this patent
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Abstract
A method for testing a material strength of a bearing inner ring includes mounting the bearing inner ring on a test shaft to form a ring test assembly. The bearing inner ring includes a ring material having a first coefficient of thermal expansion. The test shaft includes a test shaft material having a second coefficient of thermal expansion. The second coefficient of thermal expansion is greater than the first coefficient of thermal expansion. The method further includes heating the ring test assembly, cooling the ring test assembly, and testing the material strength of the bearing inner ring. The testing includes performing a plurality of cycles of the steps of heating the ring test assembly and cooling the ring test assembly.
Claims20
A method for testing a material strength of a bearing inner ring, the method comprising:
- mounting the bearing inner ring on a test shaft having an axial centerline to form a ring test assembly of the bearing inner ring mounted on the test shaft, the bearing inner ring mounted on the test shaft with an inner radial surface of the bearing inner ring contacting an outer radial surface of the test shaft, the bearing inner ring including a ring material having a first coefficient of thermal expansion, the test shaft including a test shaft material having a second coefficient of thermal expansion, the second coefficient of thermal expansion greater than the first coefficient of thermal expansion;
- heating the ring test assembly to increase a temperature of the ring test assembly to a first temperature range;
- cooling the ring test assembly to decrease the temperature of the ring test assembly from the first temperature range to a second temperature range;
- and
- testing the material strength of the bearing inner ring, the testing including performing a plurality of cycles of the steps of heating the ring test assembly and cooling the ring test assembly.
A method for testing a material strength of a ring body, the method comprising:
- mounting the ring body on a test shaft having an axial centerline to form a ring test assembly of the ring body mounted on the test shaft, the ring body mounted on the test shaft with an interference fit;
- heating the ring test assembly to increase a temperature of the ring test assembly to a first temperature range, the ring body having a maximum test hoop stress at the first temperature range;
- cooling the ring test assembly to decrease the temperature of the ring test assembly from the first temperature range to a second temperature range, the ring body having a minimum test hoop stress at the second temperature range;
- testing the material strength of the ring body by performing a plurality of cycles of the steps of heating the ring test assembly and cooling the ring test assembly;
- and
- visually inspecting the bearing inner ring subsequent to performing the plurality of cycles to classify a material strength of the inner ring.
Dependencies are inferred from the claim text.