| Citation: | ZHANG Guanghui, XU Kefan, HAN Jiazhen, et al. Test-rig design and static characteristic tests of multi-layer thrust foil bearing[J]. Journal of Aerospace Power, 2025, 40（8）：20230050 doi: 10.13224/j.cnki.jasp.20230050
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A thrust gas foil bearing test rig with dynamic and static synchronous axial loading was designed and built to obtain the variation rule of bearing characteristics. For the multi-layer thrust foil bearing with a three-layer foil structure, the static stiffness tests, lift-off speed tests, and ultimate load capacity tests were carried out successively. The results showed that the multi-section rotating shaft based on the hollow shaft design can simultaneously transfer the dynamic and static loads, helping obtain the dynamic characteristics of thrust bearings. The Coulomb friction effect resulted in the nonlinear change of the static stiffness of the bearing under test with the load, and the stiffness expression based on the fitting of test data could contribute to the relevant engineering design. The bearing dynamic pressure effect was more significant under a high bearing number, so the bearing lift-off speed increased monotonically with the preload, and the ultimate load capacity increased monotonically with speed.
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