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AssigneeAktiebolaget Skf
InventorsXingzheng Li, Keqlang Cao, Yenfeng Chen, Meng Zhang, He Zhu
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A method for conducting structural fatigue life testing of a bearing, in which a cam embedded in the bearing under test generates a rotational dynamic radial expansion and transmits the expansion through the bearing to a load collar compactly mounted on the periphery of the bearing, forcing the load collar to deform synchronously with the expansion, thereby applying, together with the cam, a rotational dynamic strain pressure load, mainly in the radial direction in both inward and outward directions, to the bearing, based on the elasticity of the load collar itself, as a test load for the structural fatigue life testing of the bearing. Based on the above method, the present invention also provides a holding mechanism that provides a rotation-resistant support for the load collar and a bearing rotation test rig capable of assembling the holding mechanism.
A method for structural fatigue life testing of a bearing, in which a cam embedded in the bearing under test generates a rotational dynamic radial expansion and transmits the expansion through the bearing to a loading device compactly mounted on the periphery of the bearing, forcing the loading device to deform synchronously with the expansion, thereby applying, together with the cam, a rotational dynamic strain pressure load, mainly in the radial direction in both inward and outward directions, to the bearing, based on the elasticity of the loading device itself, as a test load for the structural fatigue life testing of the bearing, characterized in that the loading device consists of a load collar, independently formed, of a substantially annular structure, the load collar being configured to restrain, with a rotation-resistant support of a holding mechanism, the circumferential displacement of the outer ring of the bearing embedded therein from following the rotation of the cam during the test, but to not prevent the load collar from applying the test load to the bearing based on the synchronous deformation.
A loading device for structural fatigue life testing of a bearing, consisting of a load collar, independently formed, of a substantially annular structure, which collar is adapted to accommodate a strain wave generator formed by a cam embedded in the bearing under test, capable of deforming synchronously with the rotational radial expansion generated by the strain wave generator, so as to apply, together with said cam, a dynamic rotational strain pressure load, mainly in the radial direction in both inward and outward directions, to the bearing, based on the elasticity of the load collar, as a test load for the structural fatigue life testing of the bearing.
Dependencies are inferred from the claim text.