A dynamic model for vibration studies of dry and lubricated deep groove ball bearings considering local defects on races

Shah, Dipen S.; Patel, V. N.

doi:10.1016/j.measurement.2019.01.097

Cited by 43 publications

(15 citation statements)

References 32 publications

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“…Therefore, it is undeniable that working temperature has a significant impact on bearing performance and the interaction between bearing elements caused by changes in bearing internal clearance is worth studying. Shah and Patel 26 established the motion coupling relation of shaft, bearing seat, ring and ball, and obtained the motion control equation. Liu et al 27 analyzed the thermal structure mechanism and proposed a closed-loop iterative modeling method to modify the heat source and thermal boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Research on the influence of thermal expansion of steel shaft on dynamic characteristics of full ceramic bearing-rotor system

Guo

Zhang

et al. 2022

Advances in Mechanical Engineering

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Bearing as the core components of high-grade CNC machine tools, with the constant change of internal clearance of bearing wear increasingly aggravated, spindle rotation accuracy reduced. In this paper, the idea of control variable method is used to explore the dynamic change of bearing clearance from different speeds and different radial loads. Starting with the dynamic model of bearing vibration, the theoretical model of rolling bearing with five degrees of freedom is established in this paper. The interaction force between steel shaft and ceramic bearing inner ring is calculated by Runge-Kutta method with elastic wall thickness ring theory, and the reduction of radial clearance of bearing is obtained. Therefore, a dynamic model of ceramic bearing considering the extrusion force of ceramic bearing inner ring is proposed. At the same time, the vibration test of steel shaft-all-ceramic bearing is designed and carried out. The test results show that under the same load, the higher the rotating speed, the shorter the time for the bearing-rotor system to reach temperature stability, and the root mean square of ceramic bearing-rotor system is obviously reduced. At the same speed, the greater the load, the more obvious the root mean square increase of the bearing-rotor system.

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Section: Introductionmentioning

confidence: 99%

Research on the influence of thermal expansion of steel shaft on dynamic characteristics of full ceramic bearing-rotor system

Guo

Zhang

et al. 2022

Advances in Mechanical Engineering

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“…1,2 Bearing shape, material properties, and the radial gap was included in this model. To predict the vibration of ball bearings with a single fault in the inner raceway, Shah and Patel 3 proposed a model including weights of shaft, raceway, ball, and housing, stiffness, damping, and lubrication films.…”

Section: Introductionmentioning

confidence: 99%

Dynamic asymptotic model of rolling bearings with a single fault in the inner raceway

Tian

et al. 2021

Advances in Mechanical Engineering

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In the previous models of rolling bearings with a single fault, the displacement deviation caused by the collision of the fault to the rolling element changes instantly. However, the displacement deviation should change gradually. Here, the asymptotic idea is introduced to describe the change of the displacement deviation. The calculation method of the deviation is given. An asymptotic model of rolling bearings with an inner raceway fault is constructed. Then, the simulation of the SKF6205 bearing with a single fault is carried out. The differences between the previous model and the asymptotic model for the responses and the displacement deviation are compared. The effects of the speed and fault size on the dynamic characteristics are analyzed. Finally, the experiments are carried out to corroborate the rationality of the constructed model. The research results can provide theoretical support for the dynamic analysis, fault diagnosis, and reliability analysis of rolling bearings.

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“…Local defect gives significant contribution in the vibration spectra. According to Dipen Shah et al, 15 the vibration amplitude varies with the location of defect on the outer race. However, authors predict the negligible effect of radial load on bearing vibrations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of grease lubricated deep groove ball bearing with multi-defected outer race using vibration signature analysis

Utpat¹,

Ingle²

2021

Noise & Vibration Worldwide

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Failure of any rotary machine is mainly due to bearing failure being the key element. Defect frequency is the function of speed, ball diameter, and pitch circle diameter of bearing. The number of defects does not affect the excitation frequency, but increase in the level of vibrations is observed in total. The inner race is mounted on the rotary shaft, and the outer race is fixed in the housing. Hence, a defect on the outer race does not rotate with the shaft. This article highlights the study of the multi-crack detection technique at a comparatively higher speed. Amplitudes of vibrations increase with speed, but with load, they almost remain the same. The experiment has been performed at the range from 1000 to 5000 r/min with 5 kg load on the test bearing. The location and size of the defect affect the level of vibrations with noticeable increase. However, the presence of a second defect with respect to the load zone plays an important role. As the defect is at the peak position in the load zone, outer race defect frequency excites more in the vibration spectra. The location and size of the second defect are varied, and acceleration amplitude parameters like RMS, peak, and peak to peak are compared. The current work emphasizes the effect of location and severity of the second defect on the vibration spectra and amplitude parameters of the vibrations.

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A dynamic model for vibration studies of dry and lubricated deep groove ball bearings considering local defects on races

Cited by 43 publications

References 32 publications

Research on the influence of thermal expansion of steel shaft on dynamic characteristics of full ceramic bearing-rotor system

Research on the influence of thermal expansion of steel shaft on dynamic characteristics of full ceramic bearing-rotor system

Dynamic asymptotic model of rolling bearings with a single fault in the inner raceway

Investigation of grease lubricated deep groove ball bearing with multi-defected outer race using vibration signature analysis

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