Abstract
Spindle bearing fits mainly include interference fit of inner ring and clearance fit of outer ring, which directly affect the vibration characteristics of spindle rotor-bearing system. In this paper, the influence of spindle bearing inner and outer ring fits on bearing support stiffness is firstly studied. Considering the spindle bearing inner and outer ring fits, a dynamic model of spindle rotor-bearing system is established. Then, the analysis methods of bifurcation and time domain are used to perform simulation analysis. The influence of bearing fit on the vibration characteristics of rotor system is researched. Lastly, at different rotating speeds, bearing fits experiments are conducted on built motorized spindle test platform, which verifies the correctness of the dynamic model. The results show that the influence of bearing fit on vibration is nonlinear. The influence of clearance fit on vibration is smaller, when the clearance fit value of bearing outer ring is about 4-6 μm. The vibration characteristics of rotor are more sensitive to the clearance fit of bearing outer ring than the interference fit of bearing inner ring. The research work provides an important theoretical basis for the optimal of spindle bearing assembly.
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Abbreviations
- K rLH/V :
-
The support stiffness of the left bearing inner ring in the horizontal/ vertical direction
- K bLH/V :
-
The support stiffness of the left bearing outer ring in the horizontal/ vertical direction
- K rRH/V :
-
The support stiffness of the right bearing inner ring in the horizontal/ vertical direction
- K bRH/V :
-
The support stiffness of the right bearing outer ring in the horizontal/ vertical direction
- f :
-
The unbalance value
- g :
-
The gravitational acceleration
- C rLH/V :
-
The support damping of the left bearing inner ring in the horizontal/Vertical direction
- C bLH/V :
-
The support damping of the left bearing outer ring in the horizontal/Vertical direction
- C rRH/V :
-
The support damping of the right bearing inner ring in the horizontal/Vertical direction
- C bRHN :
-
The support damping of the right bearing outer ring in the horizontal/Vertical direction
- μ p :
-
The Poisson’s ratio of bearing pedestal
- D :
-
The diameter of bearing outer ring inner ring
- δ r :
-
The radial displacement of bearing outer ring
- δ θ :
-
The contact deformation
- a p :
-
The thermal expansion coefficients of bearing pedestal
- a e :
-
The thermal expansion coefficients of bearing outer ring
- ΔT p :
-
The temperature rise of bearing pedestal
- ΔT e :
-
The temperature rise of bearing outer ring
- C0 :
-
The initial clearance fit
- L s :
-
The axial lengths of rotor
- L p :
-
The axial lengths of bearing pedestal
- μ r :
-
The relative displacements between the inner and outer ring raceway groove curvature centers caused by temperature
- μ c :
-
The relative displacements between the inner and outer ring raceway groove curvature centers caused by centrifugal force
- μ f :
-
The relative displacements between the inner and outer ring raceway groove curvature centers caused by interference fit
- μ i :
-
The Poisson’s ratio of inner ring material
- ρ i :
-
The material density of bearing inner ring
- E i :
-
The elastic modulus of bearing inner ring
- C :
-
The clearance fit
- I :
-
The interference fit
- b :
-
Ball
- i :
-
Inner ring of the bearing
- o :
-
Outer ring of the bearing
- αij :
-
The contact angel of bearing ball with inner ring
- α oj :
-
The contact angel of bearing ball with outer ring
- Q ij :
-
The contact force of bearing ball with inner ring
- Q oj :
-
The contact force of bearing ball with outer ring
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Acknowledgments
This work was supported by the National Natural Science Foundation of China [Grant numbers: 52205117, 52175107], Exchange project of the Fourth China-Ukraine Intergovernmental Meeting [Grant numbers: 35] Key Laboratory of Vibration and Control of Aero-Propulsion System, Ministry of Education, Northeastern University [Grant No.VCAME202008], Doctor Research Project of Liaoning Provincial Science and Technology Department (Grant No. 2022-BS-193).
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Zhan Wang is a Professor of School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang, China. He received his Ph.D. in Mechanical Design and Theory from Northeastern University, China. His research interests include dynamics and vibration control of the spindle.
Zinan Wang is an Associate Professor in the School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang, China. His research work is focused on the dynamic characteristics analysis of spindle rotor system.
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Wang, Z., Chen, S., He, W. et al. Research for the bearing fit effect on the vibration characteristics of spindle rotor-bearing system. J Mech Sci Technol 37, 6257–6270 (2023). https://doi.org/10.1007/s12206-023-1104-3
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DOI: https://doi.org/10.1007/s12206-023-1104-3