On the thermally-induced failure of rolling element bearings

Takabi, Jafar; Khonsari, M. M.

doi:10.1016/j.triboint.2015.10.004

Cited by 37 publications

(19 citation statements)

References 26 publications

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“…For the convenience of comparison, Reflected Sigmoidal function and Inverse Multiquadrics function are also selected as radial basis functions, and their formulas as shown in Equations (4) and (5), respectively.…”

Section: ( )mentioning

confidence: 99%

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Evaluation of Rolling Bearing Performance Degradation Using Wavelet Packet Energy Entropy and RBF Neural Network

et al. 2019

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Rolling bearings are the most important parts in rotating machinery, and one of the most vulnerable parts to failure. The rolling bearing is a cyclic symmetrical structure that is stable under normal operating conditions. However, when the rolling bearing fails, its symmetry is destroyed, resulting in unstable performance and causing major accidents. If the performance of rolling bearings can be monitored and evaluated in real time, maintenance strategies can be implemented promptly. In this paper, by using wavelet packet energy entropy (WPEE), the early fault-free features of bearing and the failure samples of similar bearings are decomposed firstly, and the energy value is extracted as the original feature, simultaneously. Secondly, a radial basis function (RBF) neural network model is established by using early fault-free features and similar bearing failure characteristics. The bearing full-life data characteristics of the extracted features are added into the RBF model in an iterative manner to obtain performance degradation Indicator. Boxplot was introduced as an adaptive threshold method to determine the failure threshold. Finally, the results are verified by empirical mode decomposition and Hilbert envelope demodulation. A bearing accelerated life experiment is performed to validate the feasibility and validity of the proposed method. The experimental results show that the method can diagnose early fault points in time and evaluate the degree of bearing degradation, which is of great significance for industrial practical applications.

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Section: ( )mentioning

confidence: 99%

“…The evaluation basis of bearing faults includes vibration signals [3], temperature changes [4], etc., while the most important part is the study of vibration signals. Bearing defects main sources of bearing-induced vibration in the bearing components.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Rolling Bearing Performance Degradation Using Wavelet Packet Energy Entropy and RBF Neural Network

et al. 2019

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“…The tapered roller bearings suffer mainly two types of friction, viscous and boundary, under elastohydrodynamic regime of lubrication due to the high speeds and loads under which the gearbox of a manual transmission operates, 31 whereas the rib contacts are not considered within this research. For the calculation of viscous friction at each instant, equation 16is used 32…”

Section: Bearing Frictionmentioning

confidence: 99%

Effect of bearing thermally induced preload on the efficiency of automotive manual transmission under RDE

Laderou

Mohammadpour

Theodossiades

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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In order to calculate the efficiency of an automotive manual transmission, taking into consideration the effect of its most power consuming components – gears and bearings – as well as the interactions between them is of high importance. In this paper, a dynamic model has been developed which can predict the frictional losses of a complete gearbox as a system and, thus, its efficiency. The effect of temperature on bearing preload is also considered and taken into account from a system perspective identifying its effect on the bearings frictional losses (as well as the overall efficiency). The operating conditions used are snapshots of the Real Driving Emissions driving cycle, which is a standard metric for automotive manufacturers. Results show that doubling the temperature can lead to 120% increase of the bearing losses and up to 140% increase of the total transmission losses. The effect of the variation of operating conditions (velocity and torque) is also taken into account. The novelty of this paper lays in the development of a dynamic model which takes into account the performance of a complete gearbox under transient operating conditions, as well as the interaction among its main components and the ability to make changes on the influencing factors of transmission efficiency so that their effect on the complete gearbox efficiency can be tracked. This has not been yet reported in the relevant literature which mainly focuses on the influencing factors of transmission power loss and efficiency experimental measurements under various operating conditions for gear pairs instead of complete gearboxes.

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“…They showed that the lubricating grease was subjected to severe thermally induced degradation by the high service temperature, which consequently resulted in decrease of the lubricating capacity of the grease. Due to the decrease in the minimum oil film thickness, the lubrication form of the roller/raceway changes from fluid lubrication to boundary lubrication, and severe surface damage and wear occur on the contact surface, thus accelerating the failure of the bearing [31,32]. Jacobs et al [33] studied the effect of raising the working temperature from 30 to 60 °C on the performance of deep groove ball bearings, which shows the cone penetration of grease decreased with the increase in temperature, leading to decline of bearing performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of grease on bearing vibration performance caused by short-time high-temperature exposure

Xiong

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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A short-time high-temperature environment is a common working condition in the use of bearings; it can occur as rapid heating before interference assembly of a bearing, or in a quick shutdown due to failure and heating of other parts of equipment. However, the current research mainly focuses on the influence of long-term high temperatures on bearing lubrication. In this paper, the 6204DDU ball bearing with lithium soap/mineral oil (paraffin base type) grease and fatty acid soap/mineral oil (refined white oil) grease (white grease) is investigated. The recovery performance of the two greases after a short-time high temperature is studied. It is found that a large number of fractures occur in the soap fibre of the white grease after 20 min exposure in 140 °C temperature environments, while lithium grease remains in a good working condition. The vibration velocity with white grease decreases during a temperature falls from 110 °C to the heated balanced temperature, while the vibration velocities with lithium grease is without significant fluctuations. Before and after heating, the vibration velocities in middle frequency band of rolling bearings with lithium grease and white grease increase with the increase in preload, but it is the opposite in the high frequency band except for white grease after heating condition. Infiltration with a small amount of water or oil can greatly affect the performance of white grease. Water can emulsify the white oil and accelerates the oxidation of white grease. The structure of the L-AN32 oil contaminant is different from that of white oil, resulting in uneven dispersion of saponified crystals and obvious flocculent agglomeration is presented.

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On the thermally-induced failure of rolling element bearings

Abstract: I would also like to thank all of my colleagues in the CeRoM laboratory of Louisiana State University for their kind help and support throughout my research.

Cited by 37 publications

References 26 publications

Evaluation of Rolling Bearing Performance Degradation Using Wavelet Packet Energy Entropy and RBF Neural Network

Evaluation of Rolling Bearing Performance Degradation Using Wavelet Packet Energy Entropy and RBF Neural Network

Effect of bearing thermally induced preload on the efficiency of automotive manual transmission under RDE

Effect of grease on bearing vibration performance caused by short-time high-temperature exposure

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