The Influence of the Raceway Curvature Ratio on Power Loss and Temperature of a High-Speed Jet Engine Ball Bearing

Gloeckner, Peter

doi:10.1080/10402004.2012.725123

Cited by 19 publications

(4 citation statements)

References 6 publications

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“…Natural triglycerides are environmentally friendly esters that feature excellent lubricity and have recently overtaken mineral oils with regard to their adoption in practice 110. The ability of natural triglycerides to function even in severe and harsh working environments, in addition to their other unique characteristics, has made them the preferred base stock in the last 50 years 111. Vegetable oils are highly biodegradable base oils that present no health hazards in the workplace 112, 113.…”

Section: Base Oilsmentioning

confidence: 99%

Switchable Substrates for Analyzing and Engineering Cellular Functions

Nakanishi¹

2013

Chemistry An Asian Journal

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Cellular activity is highly dependent on the extracellular environment, which is composed of surrounding cells and extracellular matrices. This focus review summarizes recent advances in chemically and physically engineered switchable substrates designed to control such cellular microenvironments by application of an external stimulus. Special attention is given to their molecular design, switching strategies, and representative examples for bioanalytical and biomedical applications.

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Section: Base Oilsmentioning

confidence: 99%

Switchable Substrates for Analyzing and Engineering Cellular Functions

Nakanishi¹

2013

Chemistry An Asian Journal

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“…Flouros 10 studied the influence of parameters, such as the oil flow rate, oil temperature, bearing internal pressure and rotational speed on the bearing power loss of two‐half inner ring angular contact ball bearings, as well as the influence of the oil and air mixing ratio inside the bearing. Gloeckner 11,12 studied the influence of the curvature design of this type of bearing on the calorific value and performed a comparison of the calorific value for different materials and lubrication structures for this type of bearing.…”

Section: Introductionmentioning

confidence: 99%

Research on internal two‐phase flow in the local micro‐clearance design of a high‐speed ball bearing with under‐race lubrication

Gong,

Liu,

et al. 2024

Lubrication Science

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In this research, an angular contact ball bearing with two‐half inner rings is used as a carrier. Considering the two‐phase flow characteristics of oil and air in the bearing, the flow characteristics of lubricating oil inside the bearing with under‐race lubrication are studied. Based on the volume of fluid (VOF) method and the standard k–ε turbulent flow model, the characteristics of oil and air two‐phase flow inside the ball bearing are analysed. The bearing internal pressure field distribution, streamline distribution, and other flow properties for the different radial working clearances, pocket clearances and guide clearances are determined. The distribution of the lubricating oil in key areas is observed. The oil phase volume fraction of the key lubrication areas, such as the cage pocket surface and the inner and outer ring surfaces is used to evaluate the influence of different structural parameters on the bearing lubrication performance. The lubrication influences of the inner and outer guides of the cage are evaluated, and the internal flow characteristics of the bearing are analysed with different guide clearances. The results show that with the radial working clearance range from 0.100 to 0.145 mm, the pressure in the working contact area of the bearing decreases 26%. The pocket clearance ranges from 0.48 to 0.28 mm, and the pressure in the working contact area of the bearing significant increases from 0.642 to 1.165 MPa. From this perspective, the larger the radial working clearance and pocket clearance are, the more favourable it is for bearing lubrication. For bearings with under‐ring lubrication, when the bearing adopts outer guidance, the distribution of lubricating oil in the key areas of the bearing is worse than that for internal guidance. However, the pressure in the working contact area of the bearing slightly increases from 0.642 to 0.759 MPa with the inner guide clearance increasing from 0.4 to 0.8 mm.

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“…Rolling bearings are the most widely used bearings in the vehicle transmission industry due to their advantages of less friction coefficient for rotatory movements [1]. With the future trends of vehicle transmission development shifting toward lighter and more compact designs with greater power density, the main shaft bearings are subjected to more severe demands of simultaneous shrinking size and excessive loading [2,3].…”

Section: Introductionmentioning

confidence: 99%

Flow and Heat Transfer in Jet Cooling Rolling Bearing

Wu¹,

Hu²,

Yuan³

2019

Heat and Mass Transfer - Advances in Science and Technology Applications

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The real flow field inside a jet cooling ball bearing is an air-oil two-phase flow since the air entrainment in the lubricant is ineluctable. The flow heat transfer characteristics are thought to have significant impacts in cooling effect forecast and temperature control. To this end, the fluid flow and heat transfer characteristics of the air-oil two-phase flow inside a jet cooling rolling bearing have been investigated by simulation and experiment herein. A multiphase VOF numerical method for the flow field calculation has been proposed. The temperature distributions of the bearing system have been measured, and the flow pattern under different operation speeds has also been captured. The parameter effects on the jet cooling rolling bearing flow field and temperature distribution have been revealed accordingly. The research findings can be used for the structural optimization and the precise lubrication design of the rolling bearing.

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The Influence of the Raceway Curvature Ratio on Power Loss and Temperature of a High-Speed Jet Engine Ball Bearing

Cited by 19 publications

References 6 publications

Switchable Substrates for Analyzing and Engineering Cellular Functions

Switchable Substrates for Analyzing and Engineering Cellular Functions

Research on internal two‐phase flow in the local micro‐clearance design of a high‐speed ball bearing with under‐race lubrication

Flow and Heat Transfer in Jet Cooling Rolling Bearing

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