Folgeschäden durch False-Brinelling in Radlagern durch geeignete Schmierfette vermeiden

Schadow, Christian; Tetora, Serhii; Bartel, Dirk

doi:10.1007/978-3-662-63608-4_2

Cited by 2 publications

(3 citation statements)

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“…The bearings used in the tests were pre-damaged on a false brinelling bearing test rig and then mounted in a modified FE8 test head. Previous research showed that the service life of oil-lubricated rolling bearings with false brinelling damage can be significantly reduced [18], with severe pre- Figure 12b shows the wear volume resulting from the false brinelling tests as a function of the shear viscosity for all the model greases and operating temperatures. These results indicate that as the shear viscosity increased, the damage caused by false brinelling tended to increase as well.…”

Section: Durability Test Resultsmentioning

confidence: 98%

“…The bearings used in the tests were pre-damaged on a false brinelling bearing test rig and then mounted in a modified FE8 test head. Previous research showed that the service life of oil-lubricated rolling bearings with false brinelling damage can be significantly reduced [18], with severe predamage resulting in a reduction from L 10 h,exp = 2500 h to only 150 h. In this study, greaselubricated bearings were used and were not cleaned after pre-damage due to false brinelling, with any resulting wear particles left in the bearing to simulate real-life conditions. The FE8 life tests were performed with an axial load of 18 kN (C/P = 1.49) at a rotational speed of 1000 rpm and 80 • C, with a maximum Hertzian pressure in the contact of 3202 MPa.…”

Section: Durability Test Resultsmentioning

confidence: 99%

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Influence of Grease Properties on False Brinelling Damage of Rolling Bearings

Tetora¹,

Schadow²,

Bartel

2023

Lubricants

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False brinelling damage in rolling bearings can lead to reduced component lifetimes and increased noise emissions, adversely affecting machine performance. Therefore, minimizing or avoiding such damage is very important. Environmental or operating conditions that can lead to false brinelling damage often cannot be avoided. Alternatively, such damage can be significantly reduced with suitable lubricants. This study utilized a test method from the research project FVA 540 to examine the impact of the base oil viscosity and NLGI class of greases on false brinelling damage at different temperatures. The results showed a clear dependency between the base oil viscosity of greases and the extent of false brinelling damage. Two different thickeners (lithium hydroxystearate/diurea) and different base oil types (PAO/esters) were investigated for this purpose. The results indicate that temperature had a significant effect on the physical and rheological properties of greases and show the potential for reducing false brinelling damage through the selection of appropriate lubricants. These results provide valuable information to improve the performance and lifetime of rolling bearings in industrial settings.

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Section: Durability Test Resultsmentioning

confidence: 98%

“…The bearings used in the tests were pre-damaged on a false brinelling bearing test rig and then mounted in a modified FE8 test head. Previous research showed that the service life of oil-lubricated rolling bearings with false brinelling damage can be significantly reduced [18], with severe predamage resulting in a reduction from L 10 h,exp = 2500 h to only 150 h. In this study, greaselubricated bearings were used and were not cleaned after pre-damage due to false brinelling, with any resulting wear particles left in the bearing to simulate real-life conditions. The FE8 life tests were performed with an axial load of 18 kN (C/P = 1.49) at a rotational speed of 1000 rpm and 80 • C, with a maximum Hertzian pressure in the contact of 3202 MPa.…”

Section: Durability Test Resultsmentioning

confidence: 99%

Influence of Grease Properties on False Brinelling Damage of Rolling Bearings

Tetora¹,

Schadow²,

Bartel

2023

Lubricants

View full text Add to dashboard Cite

show abstract

“…In applications where the bearings are only temporarily subjected to oscillations and are subsequently operated under continuous rotation, the resulting wear marks on the surface can lead to significant noise generation [8,33]. In addition, rolling over the edges of the wear marks that evolve under oscillating conditions can lead to an increase in surface and subsurface stresses, which in turn promote material fatigue and can lead to a reduction in service life [34]. For the operation of a rotor blade bearing, minor wear damage in the initial phase is not a problem, since the blade pitch mechanisms provide sufficient torque to overcome it.…”

Section: Discussionmentioning

confidence: 99%

Wear Development in Oscillating Rolling Element Bearings

et al. 2023

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Rotor blade bearings enable rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to frequent oscillation movements with amplitude ratios of x/2b > 1, especially due to new control concepts such as Individual Pitch Control, which can lead to wear and a reduction in service life. The objective of this paper was to identify the dominant wear mechanisms and their consequences for the operation of oscillating bearings. Oscillating experiments with an increasing number of cycles on the angular contact ball bearings of two different sizes (types 7208 and 7220) show that the damage initiation starts with adhesive and corrosive wear mechanisms, which result in a sharp increase in the torque as well as the wear volume on the bearing raceway. As the number of cycles increases, an abrasive mechanism occurs, resulting in a lower slope of the wear curve and a smoothing of the resulting wear depressions. The wear and torque curves were evaluated and classified using an energy-wear approach according to Fouvry.

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Folgeschäden durch False-Brinelling in Radlagern durch geeignete Schmierfette vermeiden

Cited by 2 publications

References 0 publications

Influence of Grease Properties on False Brinelling Damage of Rolling Bearings

Influence of Grease Properties on False Brinelling Damage of Rolling Bearings

Wear Development in Oscillating Rolling Element Bearings

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