Impact of lubricant traction coefficient on cage’s dynamic characteristics in high-speed angular contact ball bearing

This article presents a dynamic model of ball bearings with a localised defect on the outer raceway to analyse the effect of damping variation on the vibration response of defective bearings. First, a dynamic model is built based on the Hertzian contact theory, the interaction between the bearing inner ring, outer ring, and rolling element; the effect of damping and stiffness is considered; and the vibration equation of the bearing system is solved by the fourth-order Runge-Kutta algorithm. Then, the damping ratios of the experimental bearings using different types of viscosity lubricating grease are measured and compared with the damping ratios of the dynamic model; in addition, the viscous damping coefficient of the experimental bearings are calculated. Finally, the numerical analysis and experimental results show that the grease with a different level of viscosity affects the vibration signal of the defective bearing.

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“…According to equation (11), the viscous damping forces between jth ball and inner and outer rings can be expressed as…”

Section: Calculation Of Damping Forcementioning

confidence: 99%

Research on effect of damping variation on vibration response of defective bearings

Kong

Huang

Jiang

et al. 2019

Advances in Mechanical Engineering

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“…Nowadays, many scholars have studied the effects of preload [5], stiffness [6], contact angle [7], raceway surface roughness [8], and waviness [9] on the dynamic characteristics of the bearing in particular, as well as skidding behavior [10,11]. Zhang et al [12] researched the impact of lubricant traction coefficient on cage's dynamic characteristics in high-speed angular contact bearing, and the stability of cage under various working conditions was assessed by the slip ratio of cage. Jiang et al [13][14][15] researched the variable optimum preload of the bearing utilizing the transfer matrix method and systematically discussed the dynamic characteristics of bearings.…”

Section: Introductionmentioning

confidence: 99%

Research on sound field characteristics of full-ceramic angular contact ball bearing

Yan

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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This paper focuses on the distribution characteristics of the radiation noise for a full-ceramic angular contact ball bearing (FCACBB). A model for calculating the radiation noise of a FCACBB was established based on the bearing dynamic characteristics and sound radiation theory, and the effectiveness and accuracy of the method were verified by corresponding experiments. The variation of the radiation noise for a FCACBB with the rotational speed was analyzed. The directivity of the sound field in the circumferential direction was found. The variation trends of the radiation noise in the friction load zone and the impact load zone were discussed. The attenuation of the radiation noise in the radial direction and in the axial direction was investigated. The directivity angle and the degree of directivity of the sound field were explored at different radial and axial distances. The results show that the inhomogeneous contacts between the bearing components in the circumferential direction result in different degrees of friction and impact vibration at different locations, which makes the radiation noise of the FCACBB have a larger component in the radial direction than in the axial direction. The conclusions can provide a reference for predicting the radiation noise of FCACBBs and further optimizing the sound field.

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“…The vibro-acoustic characteristics are more widely investigated based on dynamic models, in which the rotational and transitional interactions are described in differential equations [7]. The vibro-acoustic characteristics concerning the contact angles [8], surface roughness [9], external loads [10][11][12][13] and skidding effects [14][15][16] were analyzed, and the performances of inner rings and cages were usually selected as the evaluation indicators [15,[17][18][19][20][21]. The researches are based on the dynamic model of steel rolling bearings, and the findings are very useful for reference.…”

Section: Introductionmentioning

confidence: 99%

On the circumferential distribution of ceramic bearing sound radiation

Bai

Zhang³

2020

J Braz. Soc. Mech. Sci. Eng.

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This paper investigates the sound radiation of ceramic bearings based on the sub-source decomposition method. The circumferential distribution of the sound field that influences the acoustic performance and service life is selected as the indicator, and the calculation precision is verified by an experiment. Afterward, the rotation speed of the bearing is fixed, and the circumferential distributions of sound pressure levels are evaluated to show the variation in radial and axial directions. Results show that the sound radiation varies greatly in the circumference, and sound pressure levels in the lower semicircles are evidently greater than those in the upper semicircles. The trends of circumferential distribution and overall sound pressure levels are different in radial direction, but similar in axial direction. The peak angle is slightly skewed to the rotation direction in the lower semicircle, and also changes with radial and axial distances. The frequency results indicate the main frequency components in the sound radiation, and the variations are discussed from the point of source radiation. This work provides insights into predicting the acoustic performance of ceramic bearings, and can guide further research and development.

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Impact of lubricant traction coefficient on cage’s dynamic characteristics in high-speed angular contact ball bearing

Cited by 56 publications

References 14 publications

Research on effect of damping variation on vibration response of defective bearings

Research on effect of damping variation on vibration response of defective bearings

Research on sound field characteristics of full-ceramic angular contact ball bearing

On the circumferential distribution of ceramic bearing sound radiation

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