Abstract
Thin-walled integrated flexible support structures are the major trend in the development of current rolling bearing technology. A thin-walled, integrated, squirrel-cage flexible support roller bearing, quasi-dynamic iterative finite element analysis (FEA) model is established in this paper. The FEA model is used to calculate the structural deformation of the thin-wall rings and support structures; the dynamic characteristics of the bearing are analyzed using the noncircular bearing modified quasi-dynamic model. The influence of the integrated flexible support structure on the internal load distribution and the dynamic characteristics of the roller bearing are analyzed. The results indicate that with the support of a flexible squirrel-cage, the maximum contact load is decreased by 14.2%, the loading region is enlarged by 25%, the cage slide ratio is reduced by 24%, and the fatigue life is increased by more than 50%. In addition, as the ring wall thickness increased, the results increasingly approached those under a rigid assumption.
Highlights
Advanced rolling bearing technology is one of the basic strategic industries and core technologies in high-speed systems and the aerospace field
As a main technological trend in the field of high-speed bearings, the integrated squirrel-cage flexible support roller bearing is a thin-wall bearing with a squirrel-cage structure connected to the outer ring and a hollow shaft assembled in the inner ring
In this type of structure, the hollow shaft, bearing ring, and squirrel-cage flexible support structures are all thin-walled, and, as a result, produce elastic structural deformations under load; this induces a change in the internal load distribution of the bearing, and leads to a significant influence on the characteristics of the bearing dynamics, which should not be neglected
Summary
Advanced rolling bearing technology is one of the basic strategic industries and core technologies in high-speed systems and the aerospace field. Yao [9] used the curved Timoshenko beam (CTB) theory to calculate the structural deformation of a thin-walled bearing ring, and analyzed the load distribution of thin-walled roller bearing; the model, assumed that the rings are supported at one or two azimuth positions only, and did not consider the specific form of the bearing support Researchers, such as Ignacio [10], Kania [11], Olave [12], Shu Ju [13] and. An integrated squirrel-cage flexible support roller bearing iterative quasi-dynamic finite element analysis (FEA) model is established This model is used to comprehensively consider the effects of contact mechanics, lubrication, and structural deformations. The calculated deformations are inserted into the noncircular rolling bearing quasi-dynamic modified model in order to obtain load distribution and dynamic characteristic analysis results of the bearing
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