Experimental Comparison of Flooded, Directed, and Inlet Orifice Type of Lubrication for a Tilting Pad Thrust Bearing

New, N. H.

doi:10.1115/1.3451900

Cited by 30 publications

(11 citation statements)

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“…This is approaching 40 percent of the temperature clil'lkrcnce between the hot-spot and oil supply temperatures. In percentage terms, this is comparable to the diffcrcnccs around the pad face reported by New (5). Hence, locating thcrmocouples close to the pad surface is as imp o r t ;~~~~ as placing them in the hot-spot region.…”

Section: Published Pad Temperature Informationsupporting

confidence: 53%

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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: Published Pad Temperature Informationsupporting

confidence: 53%

“…New (5) shows that there is a considerable variation in temperature across the full extent of a pad face, about 40°C at a pressure of 2.0 MPa and sliding speed of 62 m.s-I. Therefore, it is important to place thermocouples in the hottest part of the pad.…”

Section: Published Pad Temperature Informationmentioning

confidence: 98%

Measurements of Maximum Temperature in Tilting-Pad Thrust Bearings

Hörner¹,

Simmons

Advani³

1988

Tribology Transactions

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“…Lubrication is then distributed through holes in each pad stop and directed into the pad film. DL is another key design feature for high-speed applications since it reduces power loss and oil temperature significantly, as shown by New [10].…”

Section: Bearing and Test Conditionsmentioning

confidence: 99%

Experimental Performance Study of a High Speed Oil Lubricated Polymer Thrust Bearing

et al. 2015

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Abstract:With the demand for turbomachinery to operate at higher speeds, loads, and power, fluid film bearings that support turbomachinery must be capable of operating in these more demanding applications. Thrust bearings operating at high speeds and loads can experience high surface temperatures and thin fluid film thickness. Typically, babbitt (white metal) is the bearing lining material for most turbomachinery bearings but is limited in operating temperature and allowable film thickness. Polymer based materials are alternative materials that can operate at high temperatures and with thin films and have been in use for many decades in high load applications, such as electric submersible pumps (ESP). Test results of polymer lined thrust bearings subjected to modern turbomachinery speeds and loads are presented and compared to babbitt lined bearings of the same design and under similar conditions. The test results show polymer lined thrust bearings can operate at higher bearing unit loads than babbitt.

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“…Proportions of different sources of power loss in a thrust bearing are shown in Figure 10. In an example of high-speed bearing taken from [3][4][5] (OD = 0.125 m, = 12000 rpm → = 0 m/s) churning losses are about 46% of total power loss (line described as "1" in Figure 10). On the other hand, in a large thrust bearing, like the one analysed in this paper (OD = 1.78 m, = 21 rpm → = 1 .5 m/s), churning losses can be estimated as 15% of total power loss (line "2" in Figure 10).…”

Section: Decreasing Of Churning Power Lossmentioning

confidence: 99%

“…Moreover, temperature level in thrust bearings depends on the method of supplying cold oil to the bearing. A series of papers from early 1970s [3][4][5] indicate that directed lubrication (e.g., spray or groove systems) with evacuated bearing housing is an efficient method of decreasing temperature in high-speed bearings and signi�cant reduction of churning loss. On the other hand for low-speed applications, the authors of the above mentioned papers did not see potential for substantial decrease of bearing temperature.…”

Section: Introductionmentioning

confidence: 99%

On the Possibilities of Decreasing Power Loss in Large Tilting Pad Thrust Bearings

Wasilczuk

Rotta

2013

ISRN Tribology

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Different systems of direct oil supply have been developed in order to facilitate efficient introduction of fresh lubricant to the oil gap and reduction of churning power loss in tilting pad thrust bearings. Up to now there is no documented application of the supply groove in large thrust bearings used in water power plants. The results of modeling lubricant flow in the lubricating groove of a thrust bearing pad will be presented in the paper. CFD software was used to carry out fluid film calculations. Such analysis makes it possible to modify groove geometry and other parameters and to study their influence on bearing performance. According to the results a remarkable decrease in total power loss due to avoiding churning losses can be observed in the bearing.

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Experimental Comparison of Flooded, Directed, and Inlet Orifice Type of Lubrication for a Tilting Pad Thrust Bearing

Cited by 30 publications

References 0 publications

Measurements of Maximum Temperature in Tilting-Pad Thrust Bearings

Measurements of Maximum Temperature in Tilting-Pad Thrust Bearings

Experimental Performance Study of a High Speed Oil Lubricated Polymer Thrust Bearing

On the Possibilities of Decreasing Power Loss in Large Tilting Pad Thrust Bearings

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