A case study on relation between roughness, lubrication and fatigue life of rolling bearings

Bălan, Mihaela Rodica D.; Tufescu, A; Creţu, S.

doi:10.1088/1757-899x/147/1/012013

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…Lubrication of the bearings leads to improved tribological properties and increases the operational reliability of the bearings [3,4]. It is estimated that about 1/3 of premature bearing damage is caused by the use of a wrong type of grease or by its insufficient quantity [5,6]. Generally, the denser/more viscous the lubricant used, the lower the vibration and noise levels of the bearing [7].…”

Section: Introductionmentioning

confidence: 99%

“…Only a few papers report the results of research related to the effect of the kinematic viscosity of the lubricant on bearing vibrations. Jamadar and Vakharia observed a decrease of amplitudes of spectral components related to local defects of the bearings along with an increase in viscosity of the lubricant [6]. While Serrato, Maru and Padovese have shown that changes in lubricant viscosity can be detected through vibration monitoring [17].…”

Section: Introductionmentioning

confidence: 99%

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The influence of kinematic viscosity of a lubricant on broadband rolling bearing vibrations in amplitude terms

Jakubek¹,

Barczewski²

2018

Diagnostyka

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Long and trouble-free operation of rolling bearings is largely dependent on their lubrication. Depending on their properties, lubricants reduce the levels of vibration and noise generated by a running bearing to varying degrees. Such an influence of the lubricant is usually desirable during operation. On the other hand, from the point of view of post-production diagnostics, which uses vibroacoustic (VA) signals to evaluate the quality of bearings, lubricants can lead to unwanted masking of damage and manufacturing defects. This is due to a decrease in amplitude and/or a change in the spectral composition of the vibrations. Studies on the influence of lubricants on bearing vibrations were carried out on a set of 10 new tapered roller bearings using 12 oils of different kinematic viscosity. On the basis of the test results, the influence of oil viscosity on the level of vibrations generated by bearings and the nature of this relationship were determined. The sensitivity of selected measures of acceleration of bearing vibrations to changes in viscosity of the lubricant used was determined in this paper. On this basis, the premises concerning the criteria for selection of a lubricant for the purpose of post-production diagnostics of rolling bearings were specified. Appropriate lubricant parameters have been defined to guarantee the stability of the rolling bearing testing process and to reduce the masking of manufacturing defects in the VA signal.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of kinematic viscosity of a lubricant on broadband rolling bearing vibrations in amplitude terms

Jakubek¹,

Barczewski²

2018

Diagnostyka

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“…Since S a has little influence on 0 z and V, the effects are ignored. However, some literatures manifested that the surface roughness changed the stress distribution at sub-surface [50], and increased the sub-surface maximum orthogonal shear stress, especially in the film lubrication [51,52]. Therefore, a are the surface integrity exponents), and its coefficients are still to be determined.…”

Section: Predicted Results Of L-p Fatigue Modelmentioning

confidence: 99%

A modified model of Lundberg-Palmgren rolling contact fatigue formula considering the effects of surface treatments

et al. 2023

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The Lundberg—Palmgren (L—P) fatigue life formula, as a statistical fatigue theory, has been widely used in the industry. However, its direct applicability is limited to the components treated by surface strengthening technologies. Rolling contact fatigue tests and surface integrity measurements of American Iron and Steel Institute (AISI) 9310 rollers with several surface treatments were performed to address this issue. Based on these results, a modified L—P fatigue model was proposed, enabling the consideration of surface modification including surface roughness, residual stress, and hardening introduced by different surface treatments. Compared with the original L—P fatigue formula, its results are more accurate for surface strengthened specimens. Furthermore, this method can assess the contact fatigue life of gears treated by surface strengthening techniques.

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“…Surface damage on rolling bearings is believed to be influenced by a variety of factors. Load, surface roughness, oil viscosity, speed, sliding, temperature, hardness, and contamination have all been identified as factors that can contribute to surface damage [20][21][22][23]. In this study, the parameters that directly affect the oil film condition, including oil viscosity, rotational speed, and surface roughness, were selected and prioritized.…”

Section: Experimental Methodologymentioning

confidence: 99%

An Experimental Study of Surface Damage on Rolling Bearings in Low Lambda Conditions

et al. 2023

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In order to better understand the occurrence of surface damage in low lambda, Λ, conditions, an experimental study was conducted. The surface damage investigations have been made based on the relationship between Λ values and surface roughness. In this study, the ball roughness, rotational speed, and oil viscosity were varied to obtain a specific Λ value which ranges from 0.10 to 0.90. It was found that three different surface damage modes, namely wear, micro-pitting, and no damage occurred depending on the ball roughness and Λ value. Morphological cross-sectional of each damage mode were observed, and surface fatigue characteristics were identified. The experimental results have shown that surface fatigue, including plastic flow thickness and crack angle, are related to contact conditions, which are influenced by surface roughness and oil film thickness.

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A case study on relation between roughness, lubrication and fatigue life of rolling bearings

Cited by 11 publications

References 11 publications

The influence of kinematic viscosity of a lubricant on broadband rolling bearing vibrations in amplitude terms

The influence of kinematic viscosity of a lubricant on broadband rolling bearing vibrations in amplitude terms

A modified model of Lundberg-Palmgren rolling contact fatigue formula considering the effects of surface treatments

An Experimental Study of Surface Damage on Rolling Bearings in Low Lambda Conditions

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