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Combined analysis of stiffness and fatigue life of deep groove ball bearings under interference fits, preloads and tilting moments

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Abstract

The stiffness and fatigue life of deep groove ball bearings are greatly affected by interference fits, preloads and tilting moments. Up to now, most of current works failed to focus on the integrated analysis of stiffness and fatigue life, especially the off-diagonal stiffness items in the bearing stiffness matrix. This paper proposed an improved mathematical model of deep groove ball bearings with the consideration of interference fits and tilting moments. On this basis, the combined study on stiffness and fatigue life is conducted to determine the optimal match of interference fits, preloads and tilting moments. Moreover, the variations in off-diagonal stiffness items under different interference fits, preloads and tilting moments are also given. These results are beneficial for the assembly of deep groove ball bearings to obtain the best stiffness and fatigue life. Also, the sensitivity of off-diagonal stiffness items to interference fits, preloads and tilting moments is demonstrated, which greatly affects the dynamic characteristic of ball bearings.

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Abbreviations

A :

The distance between centers of inner and outer race groove curvature radii

A L :

A — 0.5*Pd

P d :

Radial clearance

D :

Ball diameter

d :

Diameter of bearing components

d m :

Bearing pitch diameter

E :

Elastic modulus

F :

Interaction force

f :

Coefficient of groove curvature

L :

Service life of bearings

M :

Moment acting on the bearing components

P 1 :

Pressure between inner ring hole and shaft

Q :

Contact load

u :

Ball-raceway contact ellipse major semi-axis

v :

Poisson’s ratio

α :

Contact angle

γ 0 :

D/d m

Δ:

Interference fit

ξ :

Second kind ellipse integral

ρ :

Material density

Ψ:

Angular position of balls

ψ :

Rotational angular of tilting moment

b :

Rolling balls

i :

Inner ring

o :

Outer ring

c :

Centrifugal direction or rated load

p :

Equivalent load

f :

Free non-contact state

g :

Gyroscopic effect

j :

The serial number of rolling balls

0:

Initial value

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Acknowledgments

The authors would like to thank the Important Science and Technology Innovation Program of Hubei province (No. 2019AAA001) and National Key Research and Development Program of China (2019YFB2004304) for the support given to this research.

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Correspondence to Song Deng.

Additional information

Yi Jiang received her Ph.D. degree in Management of Small and Medium-sized Enterprises from Huazhong Agricultural University, China, in 2022. She is currently a Lecturer at the Rsearch Center of Cultural and Tourism Industries of Wuhan Business University, China. Her research areas include structure design and dynamic behavior of high-speed bearing.

Tianyu Zhu is currently a graduate student majoring in Mechanical Engineering at Automotive Components of Wuhan University of Technology, China. His research areas include structure design and dynamic behavior of high-speed bearing.

Song Deng received his Ph.D. degree in Vehicle Engineering from Wuhan University of Technology, China, in 2014. He is currently an Associate Professor at Automotive Components of Wuhan University of Technology, China. His research areas include structure design and dynamic behavior of high-speed bearing.

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Jiang, Y., Zhu, T. & Deng, S. Combined analysis of stiffness and fatigue life of deep groove ball bearings under interference fits, preloads and tilting moments. J Mech Sci Technol 37, 539–553 (2023). https://doi.org/10.1007/s12206-023-0101-x

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  • DOI: https://doi.org/10.1007/s12206-023-0101-x

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