The Leading-Edge-Groove Tilting-Pad Thrust Bearing: Recent Developments

Mikula, A. M.

doi:10.1115/1.3261099

Cited by 28 publications

(13 citation statements)

References 6 publications

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“…This measure allows up to 70 per cent reduction in power loss [15] and up to 20 K reduction in temperature [12,13], depending on operating conditions and the system used. In the present study a smaller reduction in energy consumption is achieved and only before the onset of turbulence.…”

Section: Discussionmentioning

confidence: 99%

Influence of oil viscosity grade on thrust pad bearing operation

Glavatskih

DeCamillo

2004

Proceedings of the Institution of Mechanical Engineers, Part J:

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The effect of oil viscosity grade on the performance of tilting pad thrust bearings is examined in a wide range of shaft speeds and specific bearing loads. Data being discussed were obtained in tests carried out with 228 mm outer diameter (o.d.) and 267 mm o.d. bearings lubricated with ISO VG32 and ISO VG68 mineral oils in a fully flooded mode. In a low-speed range (below 40 m/s), the performance of the 228 mm bearing is analysed in terms of pad and collar temperatures, power loss and oil film thickness. Pad temperature and power loss are employed in the analyses of the 267 mm o.d. bearing operated at high sliding speeds of up to 115 m/s. The results show that there is a significant effect of oil viscosity grade on bearing main operating parameters. The substitution of ISO VG32 oil for ISO VG68 oil results in considerably reduced pad temperatures, lower power loss and thinner oil film thickness. However, no measurable difference in power loss was observed after the onset of turbulence. The influence of oil viscosity grade on pad temperature pattern is analysed. The thermal effect of oil viscosity grade on pad temperature pattern and power loss is also compared with the effect of offset pivot.

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Section: Discussionmentioning

confidence: 99%

Influence of oil viscosity grade on thrust pad bearing operation

Glavatskih

DeCamillo

2004

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…The performance data presented isolates and identifies the individual contributions of shoe pivot location and oil supply method. These issues were raised in the discussion of the .vo previous papers [1,2], and based on this test data, should now be resolved.…”

Section: Introductionmentioning

confidence: 87%

“…Cool, undiluted lubricant is introduced from this groove directly into the fluid film of each shoe. This method of supplying oil into the hydrodynamic wedge has been found to significantly reduce bearing frictional power losses and babbitt temperatures [1,2).…”

Section: Introductionmentioning

confidence: 99%

“…The two previous papers [I, 2J compared offset pivot (60 percent) LEG and central pivot (50 percent) conventional thrust bearings. Elwell and Leopard in reference [I), and l\-1artin and Gardner in reference [2] questioned whether the LEG temperature ad~ vantage was a result of the lubrication supply method or pivot location. This paper presents test data that addresses that question.…”

Section: Introductionmentioning

confidence: 99%

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Further Test Results of the Leading-Edge-Groove (LEG) Tilting Pad Thrust Bearing

Mikula

1988

Journal of Tribology

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This paper compares the LEG and pressurized controlled flow lubricant supply methods and evaluates their influence on the babbitt temperature and bearing power loss performance of a tilting pad, equalizing thrust bearing. The paper also presents new experimental temperature data from bidirectional testing of a unidirectional LEG bearing. The experimental data presented is from a 267 mm (10.5 in.) O.D. bearing, operating at shaft speeds up to 13000 rpm with applied loads that produced mean unit pressures of up to 3.45 MPa (500 psi). Conclusions are drawn based upon these test data.

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“…Specifically, he has shown that the LEG design of thrust pad will perform satisfactorily, when running backwards under heavily loaded conditions. Horner et al 2 unidirectional do not preclude occasional successful bidirectional operation.…”

Section: K Brockwellmentioning

confidence: 95%

Discussion: “Further Test Results of the Leading-Edge-Groove (LEG) Tilting Pad Thrust Bearing” (Mikula, A. M., 1988, ASME J. Tribol., 110, pp. 174–179)

Brockwell

1988

Journal of Tribology

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Downloaded From: https://tribology.asmedigitalcollection.asme.org on 06/08/2019 Terms of Use: http://www.asme.org/about-asme/terms-of-use fer as the flow rates are reduced. With this tradeoff in mind, positive bearing cavity pressure (0.007 to 0.014 MPa/1 to 2 the LEG was developed to effectively manage reduced oil psi) develops during operation. This discharge arrangement flows in such a way as to eliminate this usual tradeoff.permits the efficient removal of oil from the bearing cavity The purpose of the oil control ring is to control the and prevents the possible cavitation damage due to a negative discharge of oil from the bearing so that only a very slight cavity pressure.

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The Leading-Edge-Groove Tilting-Pad Thrust Bearing: Recent Developments

Cited by 28 publications

References 6 publications

Influence of oil viscosity grade on thrust pad bearing operation

Influence of oil viscosity grade on thrust pad bearing operation

Further Test Results of the Leading-Edge-Groove (LEG) Tilting Pad Thrust Bearing

Discussion: “Further Test Results of the Leading-Edge-Groove (LEG) Tilting Pad Thrust Bearing” (Mikula, A. M., 1988, ASME J. Tribol., 110, pp. 174–179)

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