A novel formulation for radial fretting wear: Application to false brinelling in thrust bearings

Performance parameters such as power loss, minimum film thickness, and maximum oil temperature of the sector-shaped tilting pad thrust bearings employing the new micro-structural geometries on pad surfaces have been investigated. The lubrication equation incorporating the mass-conservation issue is discretized using the finite element method and the solution of resulting algebraic equations is obtained employing a Newton-Schur method. The pad equilibrium in the analysis is established using the Newton-Raphson and Braydon methods. The influence of attributes of micro-structures such as depth, circumferential and radial positioning extents have been explored on the performance behaviours. It is found that with the new micro-structured pad surfaces, the performance parameters significantly improved in comparison to conventional plain and conventional rectangular pocketed pads.

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An experimental analysis of the hydrodynamic contribution of textured thrust bearings during steady-state operation: A comparison with the untextured parallel surface configuration

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1177/1350650114537484 ◽

2014 ◽

Vol 229 (4) ◽

pp. 362-375 ◽

Cited By ~ 31

Author(s):

Y Henry ◽

J Bouyer ◽

M Fillon

Keyword(s):

Steady State ◽

Experimental Analysis ◽

Thrust Bearings ◽

Surface Configuration ◽

Parallel Surface ◽

Steady State Operation

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Discussion: “High-Speed Performance of Tapered Roller Thrust Bearings With Various Lubricating Systems” (Naik, V. V., Keim, E. L., and Neifert, H. R., 1970, ASME J. Lubr. Technol., 92, pp. 97–101)

Journal of Lubrication Technology ◽

10.1115/1.3451275 ◽

1970 ◽

Vol 92 (1) ◽

pp. 102-102

Author(s):

W. J. Anderson

Keyword(s):

High Speed ◽

Thrust Bearings ◽

Speed Performance ◽

Tapered Roller

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Fretting Wear Behavior of Three Kinds of Rubbers under Sphere-On-Flat Contact

Materials ◽

10.3390/ma14092153 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2153

Author(s):

Tengfei Zhang ◽

Jie Su ◽

Yuanjie Shu ◽

Fei Shen ◽

Liaoliang Ke

Keyword(s):

Normal Force ◽

Wear Behavior ◽

Displacement Amplitude ◽

Fretting Wear ◽

Butadiene Rubber ◽

Force Frequency ◽

Sealing Performance ◽

Rubber Surface ◽

Sealing Materials ◽

Flat Contact

Rubbers are widely used in various fields as the important sealing materials, such as window seal, door seal, valve, pump seal, etc. The fretting wear behavior of rubbers has an important effect on their sealing performance. This paper presents an experimental study on the fretting wear behavior of rubbers against the steel ball under air conditions (room temperature at 20 ± 2 °C and humidity at 40%). Three kinds of rubbers, including EPDM (ethylene propylene diene monomer), FPM (fluororubber), and NBR (nitrile–butadiene rubber), are considered in experiments. The sphere-on-flat contact pattern is used as the contact model. The influences of the displacement amplitude, normal force, frequency, and rubber hardness on the fretting wear behavior are discussed in detail. White light profiler and scanning electron microscope (SEM) are used to analyze the wear mechanism of the rubber surface. The fretting wear performances of three rubbers are compared by considering the effect of the displacement amplitude, normal force, frequency, and rubber hardness. The results show that NBR has the most stable friction coefficient and the best wear resistance among the three rubbers.

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