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Dynamic Analysis of the Bearing-Rotor System with the Variation of Cage’s Pocket Hole Diameter

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Iranian Journal of Science and Technology, Transactions of Mechanical Engineering Aims and scope Submit manuscript

Abstract

Ceramic bearings are widely used in industrial production. They can be used to maintain accurate operations over a long period of time. However, the bearing model that was so thoroughly investigated has not been adapted for ceramic bearings. To better calculate the characteristics of ceramic bearings, the existing model may be modified to account for the high stiffness of ceramics. In this paper, the vibration response is investigated and used to modify the analytical model of bearing-rotor dynamics. Under the influence of thermal deformation, the dynamic parameters of the bearing components, including stiffness, traction forces, and Hertz contact force, are analyzed first. On the basis of the modified dynamic model, the vibration response of the bearing-rotor system, time domain, Poincaré phase diagram, phase trajectory, and bifurcation diagram are simulated under various cage pocket hole diameters. The simulation results indicate that increasing the cavity diameter can appropriately improve the dynamics of the rotor system at high speeds. The established model is highly accurate, with an error of less than 8% when comparing the simulation and experimental results. The study’s relevance to bearing structural design has been confirmed.

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Data Availability

The data are available from the corresponding author on reasonable request.

Abbreviations

f 1 :

Structure and load correlation coefficient

P 1 :

The calculated load of the friction torque

η 0 :

Dynamic viscosity of lubricating oil

R 1 :

Cage centering surface radius

V 1 :

Sliding speed relative to the surface

C 1 :

Cage guide gap

L :

Cage centering surface width

M 0 :

Friction torque generated by oil–gas lubrication

d m :

The round diameter of the bearing joint

ε :

Relative eccentricity of the cage center

R P :

The effective radius curvature in the ξ direction

R P :

Effective radius curvature in the η direction

u Pηj :

The jth ball surface velocity in the η direction

u Pξj :

The average of the jth ball surface velocity

u SPξj :

The sliding velocity in the ξ direction

u SPηj :

The sliding speed in the η direction

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Acknowledgements

This work was supported by the National Natural Science Foundation of China [Grant numbers: 52205117, 62173238], Exchange project of the Fourth China-Ukraine Intergovernmental Meeting [Grant numbers: 35], Doctor Research Project of Liaoning Provincial Science and Technology Department (Grant No. 2022-BS-193).

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Correspondence to Peng Zhou.

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The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

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Wang, Z., Wang, Q., Zhou, P. et al. Dynamic Analysis of the Bearing-Rotor System with the Variation of Cage’s Pocket Hole Diameter. Iran J Sci Technol Trans Mech Eng (2024). https://doi.org/10.1007/s40997-024-00764-z

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  • DOI: https://doi.org/10.1007/s40997-024-00764-z

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