Impact of the temperature-varying fit clearance on the dynamic characteristics of a full ceramic ball bearing-rotor system

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (14) : 53-59.

SHI Huaitao1,2，BAI Xiaotian1,2，ZOU Defang1,2，BAO Zhigang1,2

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Abstract

The full ceramic angular contact ball bearing has the characteristics of small thermal deformation and greatly varying fit clearance between the outer ring and the pedestal in wide temperature range working condition.A dynamic model considering the temperature-varying fit clearance was put forward, and the thermal deformation of the bearing outer ring and the pedestal was analysed respectively.The fit clearance at different temperature was taken as a boundary condition, and parametric studies on the working temperature, rotation speed and initial fit clearance were conducted.The precision of the model was verified through experimental investigations.The results show that the calculation results of the dynamic model considering the effect of temperature-varying fit clearance match well with the experimental results.The vibration amplitude has an uptrend with the increase of working temperature, and shows an obvious nonlinear trend.Appropriate tight fit between the outer ring and the pedestal can help reduce the fit clearance at high temperature, and also improve the working accuracy of the bearing in wide temperature range condition.The study has reference significance for the state analysis of full ceramic angular contact ball bearings, and provides a theoretical basis for the optimum design of the bearing-rotor system.

Key words

full ceramic ball bearing / dynamic model / fit clearance / wide temperature range condition

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SHI Huaitao，BAI Xiaotian，ZOU Defang，BAO Zhigang. Impact of the temperature-varying fit clearance on the dynamic characteristics of a full ceramic ball bearing-rotor system[J]. Journal of Vibration and Shock, 2021, 40(14): 53-59

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