Size effects in tilting pad thrust bearings

Ettles, C. M. McC.

doi:10.1016/0043-1648(80)90281-1

Cited by 39 publications

(20 citation statements)

References 1 publication

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“…Repeating this exercise at other speed ranges u p to 80 m.s-' also gives the same result. This is in agreement with the theoretical work of Ettles (14) who shows that at typical operating duties, the trend of increasing temperature with pad size should only start for pads larger than about 150 mm.…”

Section: Presentation Of Pad Temperature Informationsupporting

confidence: 90%

Measurements of Maximum Temperature in Tilting-Pad Thrust Bearings

Hörner¹,

Simmons

Advani³

1988

Tribology Transactions

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One of the intportant restrictions governing the design of tiltingpad ttrrncsl beari11g.v iS the lnaximum allowable white metal temperatitre. However, cr(leqz~ate guidance on typical pad operating temperahrres h m not been available in established lubrication handbooks. New pad tenlperattcre data from 12 test bearings have been co~ribined with previously published work to provide a source of infonuntion covering a diverse range of proven bearing types and size.s.The collected infornzation has been presented as the difference between the ~nrwimum pad and oil supply temperatures at fixed values (f bearing pressure against mean sliding speed. Clear trends have beerzfiunrl in the (lala which have enabled curves of typical Oenring perfomnnce to be drawn through the test results. The differences betrueen the type of k~bricant feed ("flooded" or "low 1o.s.s"l"rlircctcrl") (~n d the pivot position (center or offset) have been highlighted.

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Section: Presentation Of Pad Temperature Informationsupporting

confidence: 90%

Measurements of Maximum Temperature in Tilting-Pad Thrust Bearings

Hörner¹,

Simmons

Advani³

1988

Tribology Transactions

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“…Ettles (21) showed that thermal distortion undergoes a size effect, increasing exponentially as the pad size is increased. This emphasizes the increasingly dominant r61e of deflection in large thrust bearings and the need to account for it in a comprehensive model.…”

Section: Treatment Of Pad Deflectionmentioning

confidence: 98%

Three-Dimensional Thermoelastohydrodynamic Analysis of Pivoted Pad Thrust Bearings Part 1: Treatment of Bearing Deflections and Fluid Film Flow and Heat Transfer

El-Saie

Fenner

1988

Proceedings of the Institution of Mechanical Engineers, Part C:

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A computational method is described for predicting the performance of pivoted pad thrust bearings. The model used allows for heat generation and transfa in the oil firm and also heat conduction in the pad and other solid parts of the bearing. Pad dejections due to both temperature variations and oil film pressures are calculated, and an overall solution procedure developed which allows all of these effects to interact. As C D E f h I i k k r L m M MT n n P 4 r Re T U 1

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“…Kawabata et al [3] analyzed the elastohydrodynamic lubrication condition in thrust pad bearing with circular bumps and different inlet conditions. Many researches [4][5][6][7] gave more importance to thermal expansion compared to elastic deformation in conformal contacts. Cameron [8] studied the effect of generated heat on viscosity of the lubricant under conformal contacts.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of rough thrust pad bearing under thermo-elastohydrodynamic lubrication using an improved iterative method

Kumar

Azam

Ghosh

et al. 2019

Mechanics & Industry

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The asperities present on interacting surfaces of a bearing influence the film formation when the oil film becomes thinner and thinner. The aim of this article is to study the effect of stochastic roughness on bearing performance under thermo-piezoviscous and elastic condition using an average flow model. To investigate the present operating conditions, progressive mesh densification method as a fast and simple algorithm has been applied. The results obtained indicate that transverse roughness generates higher pressure compared to other orientational roughness at various film thicknesses. Maximum pressure, mass flow rate and load capacity are larger in transverse roughness compared to other orientational roughness for all values of hydrodynamic roughness parameters. A large sensitivity in load capacity for transverse orientation compared to longitudinal at higher film thickness and small film thickness ratios are witnessed. The frictional coefficient in longitudinal orientation is large compared to transverse orientation at all values of film thickness ratio and step ratios. Materials with low elastic modulus undergo large deformation, resulting in generation of two sharp pressure peaks. These results may possess good acceptability to practical applications for studying the effect of surface roughness under thermo-elastohydrodynamic lubrication condition.

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Size effects in tilting pad thrust bearings

Cited by 39 publications

References 1 publication

Measurements of Maximum Temperature in Tilting-Pad Thrust Bearings

Measurements of Maximum Temperature in Tilting-Pad Thrust Bearings

Three-Dimensional Thermoelastohydrodynamic Analysis of Pivoted Pad Thrust Bearings Part 1: Treatment of Bearing Deflections and Fluid Film Flow and Heat Transfer

Performance evaluation of rough thrust pad bearing under thermo-elastohydrodynamic lubrication using an improved iterative method

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