Investigation of skidding in angular contact ball bearings under high speed

Wang, Yunlong; Wang, Wenzhong; Zhang, Shengguang; Zhao, Ziqiang

doi:10.1016/j.triboint.2015.07.021

Cited by 110 publications

(42 citation statements)

References 27 publications

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“…The normal contact forces can be obtained through Hertz contact theory [35], and the traction forces can be calculated [36] by ηV c S c /h c , where η is the lubricant viscosity; V c is the relative velocity of the ball and raceways; S c is the contact area; and h c is the film thickness. For the detailed calculation of the other forces, please refer to Ref.…”

Section: Differential Equations Of Vibrations On Ceramic Ballmentioning

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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Section: Differential Equations Of Vibrations On Ceramic Ballmentioning

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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“…36 Áv is the skidding velocity, which can be obtained in reference. 30 Computation method and its flowchart. A brief flowchart for calculating process of ball bearing is shown in Figure 2.…”

Section: The Interaction Forces In Equationmentioning

confidence: 99%

Investigation of cage motions affected by its unbalance in a ball bearing

Han

Wen

Wang

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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Cage rotating and whirling inside rolling bearings involve conical motion and easily lead to excessive wear if the cage exists unexpected unbalances. In this study, the cage motions affected by its unbalance in a ball bearing are investigated analytically and experimentally, which helps to understand the bearing dynamics and cage wear. Firstly, a dynamic model of angular contact ball bearing with the unbalanced cage is established to simulate the cage motions as a function of typical cage unbalances over a range of operating speeds. Then, an experimental approach is proposed to measure the spatial motions of the cage with various prescriptive unbalances on a test rig. Finally, the trajectories, waveforms, and spectra of cage motions are constructed and compared to elucidate its diversified patterns under various cage unbalances. The experimental observations of the cage motions agree well with the theoretical predictions and reveal that the whirl motions of cage are evidently affected by its unbalances. The increment of cage unbalance mass makes the trajectories of cage center more regular and enlarges the whirl radii. It is also observed that the amplitudes of the axial and radial motions of the cage, particularly corresponding cage rotating frequency and the wear extent of the cage guiding surface increase with the increment of cage unbalance.

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“…For rolling bearings under highspeed and low loading conditions such as MWAs bearings, local scratching damage caused by skidding is a common failure [6]. When the bearing component's surface is locally damaged, the high-frequency impact response between components during the operation will be excited [7,8] and the vibration signals exhibit an amplitude modulation phenomenon that combines the characteristic frequency of the bearing defect with the structural resonances [9].…”

Section: Introductionmentioning

confidence: 99%

An Automatic Bearing Fault Diagnosis Method Based on Characteristics Frequency Ratio

Wang²,

Wang³

et al. 2020

Sensors

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Bearing is a key component of satellite inertia actuators such as moment wheel assemblies (MWAs) and control moment gyros (CMGs), and its operating state is directly related to the performance and service life of satellites. However, because of the complexity of the vibration frequency components of satellite bearing assemblies and the small loading, normal running bearings normally present similar fault characteristics in long-term ground life experiments, which makes it difficult to judge the bearing fault status. This paper proposes an automatic fault diagnosis method for bearings based on a presented indicator called the characteristic frequency ratio. First, the vibration signals of various MWAs were picked up by the bearing vibration test. Then, the improved ensemble empirical mode decomposition (EEMD) method was introduced to demodulate the envelope of the bearing signals, and the fault characteristic frequencies of the vibration signals were acquired. Based on this, the characteristic frequency ratio for fault identification was defined, and a method for determining the threshold of fault judgment was further proposed. Finally, an automatic diagnosis process was proposed and verified by using different bearing fault data. The results show that the presented method is feasible and effective for automatic monitoring and diagnosis of bearing faults.

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Investigation of skidding in angular contact ball bearings under high speed

Cited by 110 publications

References 27 publications

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

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

Investigation of cage motions affected by its unbalance in a ball bearing

An Automatic Bearing Fault Diagnosis Method Based on Characteristics Frequency Ratio

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