Study on the Load Distribution and Dynamic Characteristics of a Thin-Walled Integrated Squirrel-Cage Supporting Roller Bearing

Wang, Liqin; Zhang, Chuanwei

doi:10.3390/app6120415

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…Meanwhile, the theoretical expression for the force of ERSFD is built by using the Simpson integral method. Moreover, the ERSFD rotor's equations are established to investigate the rotor's dynamic characteristics [24][25][26][27][28][29][30].…”

Section: ． Model and Methodsmentioning

confidence: 99%

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Dynamic analysis of the rotor system with elastic ring squeeze film damper considering oil film temperature

Zhang

Sun

Ge³

et al. 2023

Nonlinear Dyn

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Elastic ring squeeze film damper (ERSFD) is widely used for vibration and noise control of industrial rotating machinery. However, the oil film temperature has an impact on the ERSFD rotor system under large unbalanced force and speed, which is not considered in the existing ERSFD rotor system research. In this paper, by coupling energy equation with Reynolds equation and viscosity-temperature equation, an ERSFD model considering oil film temperature is established to investigate the oil film force and temperature distribution. Based on this model, an ERSFD combined support rotor considering oil film temperature is modeled by coupling the dynamic equations of the combined support rotor with the ERSFD reaction force. Then, the influence of oil film temperature on the amplitude frequency response curve and the sudden unbalance response curve of the ERSFD rotor is analyzed. The results reveal that lower temperature decreases the vibration amplitude and shortens the transient process. Finally, the established model and some simulation results are validated by the ERSFD rotor test platform.

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Section: ． Model and Methodsmentioning

confidence: 99%

“…where w c is the angular velocity. δ j is the jth ball element's deformation and it can be given as: The squirrel cage force and elastic ring force can be given as [14,[38][39][40][41]:…”

Section: Motion Equations Of the Ersfd Rotormentioning

confidence: 99%

Dynamic analysis of the rotor system with elastic ring squeeze film damper considering oil film temperature

Zhang

Sun

Ge³

et al. 2023

Nonlinear Dyn

View full text Add to dashboard Cite

show abstract

“…The elastic deformation of the bearing ring will certainly affect its performance, [21][22][23] but there are few researches on its effect on bearing vibration. Alexandre et al, 24 based on the dynamics of high-speed CRBs, found that the flexible ring can reduce the high frequency harmonic vibration of bearings.…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of vibration characteristics of high-speed cylindrical roller bearing with groove elastic supports

Sun,

Jiang,

Liu

et al. 2024

Advances in Mechanical Engineering

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As a necessary support system of high-speed rotor system, the roller bearing with elastic support’s vibration characteristics directly affect the stability and safety of rotor system. At this point, the theoretical analysis of bearing performance under the assumption of rigid ring is obviously no longer applicable. In this paper, considering the elastic deformation of both cylindrical roller bearing outer ring and the groove elastic support, the dynamic differential equations of cylindrical roller bearing with the elastic support are established on the basis of rolling bearing dynamics, and the bearing’s vibration under different working conditions is analyzed. The theoretical analysis results show that the groove elastic support can effectively reduce the radial vibration of cylindrical roller bearing under high speed and large radial load. And the experimental results show that the test’s vibration is consistent with the simulation’s vibration, which proves the reliability of the dynamic model of cylindrical roller bearing with the groove elastic support proposed in this paper. This research gives a new method for improving the dynamic characteristics of high-speed cylindrical roller bearings, and the model presented in this paper provides a theoretical basis for the design and manufacture of cylindrical roller bearing with elastic support.

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Dynamic analysis of the variable stiffness support rotor system with elastic rings

Sun

Zhang

et al. 2022

Nonlinear Dyn

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Elastic rings are common rotor supporting structure, which have been widely used in aeroengine rotorsupport system. However, large inertia force and gyroscopic moment may occur during the operation of aeroengine, which may lead to contact between elastic ring and bearing pedestal, and then introduce variable stiffness into the rotor-support system. In this paper, a mathematical model of variable stiffness of elastic ring is proposed and this model is subsequently verified by comparison with simulation analysis and experimental results. Based on this model, a variable stiffness model of an elastic ringsupported rotor is developed by coupling the kinetic equations of the rotor with the deformation of the combined support. Then, the spectrum cascades are used to analyze the dynamic characteristics of the rotor system. In addition, the influences of the variable stiffness of elastic ring on the critical speed of the system are also examined. Finally, some simulation results are verified by experiments on a combined test bench of an elastic ring-supported rotor.

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Study on the Load Distribution and Dynamic Characteristics of a Thin-Walled Integrated Squirrel-Cage Supporting Roller Bearing

Cited by 8 publications

References 14 publications

Dynamic analysis of the rotor system with elastic ring squeeze film damper considering oil film temperature

Dynamic analysis of the rotor system with elastic ring squeeze film damper considering oil film temperature

Theoretical analysis of vibration characteristics of high-speed cylindrical roller bearing with groove elastic supports

Dynamic analysis of the variable stiffness support rotor system with elastic rings

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