Research Papers: Coatings and Solid Lubricants

Experimental Studies on Foil Bearing With a Sliding Coating Made of Synthetic Material

[+] Author and Article Information
Grzegorz Zywica

Head of the Turbines Dynamics
and Diagnostics Department
Institute of Fluid-Flow Machinery,
Polish Academy of Sciences,
Fiszera 14 Street,
Gdansk 80-231, Poland
e-mail: gzywica@imp.gda.pl

Pawel Baginski

Institute of Fluid-Flow Machinery,
Polish Academy of Sciences,
Fiszera 14 Street,
Gdansk 80-231, Poland
e-mail: pbaginski@imp.gda.pl

Slawomir Banaszek

Institute of Fluid-Flow Machinery,
Polish Academy of Sciences,
Fiszera 14 Street,
Gdansk 80-231, Poland
e-mail: slawomir.banaszek@imp.gda.pl

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 23, 2014; final manuscript received June 22, 2015; published online September 22, 2015. Assoc. Editor: Satish V. Kailas.

J. Tribol 138(1), 011301 (Sep 22, 2015) (10 pages) Paper No: TRIB-14-1313; doi: 10.1115/1.4031396 History: Received December 23, 2014; Revised June 22, 2015

The paper discusses the research on foil bearings with antifriction coating manufactured from synthetic materials. The tests were carried out on a special test stand of our own construction, designed with the use of numerical analysis. In the course of the experimental studies, the test stand was set up in two configurations: with one or two foil bearings. The measurements were done, which focused on temperature distributions with the aid of thermocouples and thermovision camera. The measurements were being performed under varying conditions of bearing operation. The conducted experiments permitted to verify the durability, thermal characteristics, and dynamic performance of foil bearings in different configurations. An original method to measure temperature of a top foil has been worked out.

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Agrawal, G. L. , 1997, “ Foil Air/Gas Bearing Technology—An Overview,” ASME Paper No. 97-GT-347.
Nalepa, K. , Pietkiewicz, P. , and Zywica, G. , 2009, “ Development of the Foil Bearing Technology,” Tech. Sci., 12, pp. 229–240.
Bruckner, R. J. , 2010, “ An Assessment of Gas Foil Bearing Scalability and the Potential Benefits to Civilian Turbofan Engines,” ASME Paper No. GT2010-22118.
DellaCorte, C. , 2012, “ Oil-Free Shaft Support System Rotordynamics: Past, Present and Future Challenges and Opportunities,” Mech. Syst. Signal Process., 29, pp. 67–76. [CrossRef]
DellaCorte, C. , 1997, “ A New Foil Air Bearing Test Rig for Use to 700 °C and 70,000 rpm,” NASA, Washington, DC, Technical Report No. NASA TM-107405.
Salehi, M. , and Heshmat, H. , 2001, “ Performance of a Complaint Foil Seal in a Small Gas Turbine Engine Simulator Employing a Hybrid Foil/Ball Bearing Support System,” Tribol. Trans., 44(3), pp. 458–464. [CrossRef]
Lange, R. G. , and Carroll, W. P. , 2008, “ Review of Recent Advances of Radioisotope Power Systems,” Energy Convers. Manage., 49(3), pp. 393–401. [CrossRef]
Howard, S. A. , 1999, “ Rotordynamics and Design Methods of an Oil-Free Turbocharger,” Tribol. Trans., 42(1), pp. 174–179. [CrossRef]
Kim, T. H. , and San Andrés, L. , 2007, “ Analysis of Advanced Gas Foil Bearings With Piecewise Linear Elastic Supports,” Tribol. Int., 40(8), pp. 1239–1245. [CrossRef]
Lee, Y.-B. , Park, D.-J. , Kim, C.-H. , and Kim, S.-J. , 2008, “ Operating Characteristics of the Bump Foil Journal Bearings With Top Foil Bending Phenomenon and Correlation Among Bump Foils,” Tribol. Int., 41(4), pp. 221–233. [CrossRef]
Patil, M. B. , Kalita, K. , and Kakoty, S. K. , 2013, “ Performance Analysis of Gas Foil Bearing With Different Foil Pivot Configuration,” Adv. Mech. Eng., 2013, p. 843419.
Heshmat, H. , Hryniewicz, P. , Walton, J. F., II , Willis, J. P. , Jahanmir, S. , and DellaCorte, C. , 2005, “ Low-Friction Wear-Resistant Coatings for High-Temperature Foil Bearings,” Tribol. Int., 38(11–12), pp. 1059–1075. [CrossRef]
DellaCorte, C. , Radil, K. C. , Bruckner, R. J. , and Howard, S. A. , 2007, “ Design, Fabrication and Performance of Open Source Generation I and II Compliant Hydrodynamic Gas Foil Bearings,” ASME Paper No. IJTC2007-44085.
Gupta, S. , Filimonov, D. , Zaitsev, V. , Palanisamy, T. , El-Raghy, T. , and Barsoum, M. W. , 2009, “ Study of Tribofilms Formed During Dry Sliding of Ta2AlC/Ag or Cr2AlC/Ag Composites Against Ni-Based Superalloys and Al2O3,” Wear, 267(9–10), pp. 1490–1500. [CrossRef]
Kicinski, J. , Zywica, G. , and Baginski, P. , 2014, “ Thermal Studies on Foil Bearings With a Sliding Coating Made of Plastic Material,” 9th IFToMM International Conference on Rotor Dynamics, Milan, Italy, Sept. 22–25, pp. 1183–1193.
Hou, Y. , Zhu, Z. H. , and Chen, C. Z. , 2004, “ Comparative Test on Two Kinds of New Compliant Foil Bearing for Small Cryogenic Turbo-Expander,” Cryogenics, 44(1), pp. 69–72. [CrossRef]
Hongli, Z. , Yu, H. , and Liang, C. , 2009, “ Experimental Study on a Small Brayton Air Refrigerator Under −120 °C,” Appl. Therm. Eng., 29(8–9), pp. 1702–1706. [CrossRef]
Kicinski, J. , and Zywica, G. , 2012, “ The Numerical Analysis of the Steam Microturbine Rotor Supported on Foil Bearings,” Adv. Vib. Eng., 11(2), pp. 113–120.
Kus, B. , and Neksa, P. , 2013, “ Oil Free Turbo-Compressors for CO2 Refrigeration Applications,” Int. J. Refrig., 36(5), pp. 1576–1583. [CrossRef]
Kozanecki, Z. , Tkacz, E. , Lagodzinski, J. , and Miazga, K. , 2014, “ Theoretical and Experimental Investigations of Oil-Free Bearings and Their Application in Diagnostics of High-Speed Turbomachinery,” Key Eng. Mater., 588, pp. 302–309. [CrossRef]
Kicinski, J. , and Zywica, G. , 2014, Steam Microturbines in Distributed Cogeneration, Springer, Cham, Heidelberg, New York, Dordrecht, London.
Gupta, S. , Filimonov, D. , Zaitsev, V. , Palanisamy, T. , and Barsoum, M. W. , 2008, “ Ambient and 550 °C Tribological Behavior of Select MAX Phases Against Ni-Based Superalloys,” Wear, 264(3–4), pp. 270–278. [CrossRef]
Feyzullahoglu, E. , and Saffak, Z. , 2008, “ The Tribological Behaviour of Different Engineering Plastics Under Dry Friction Conditions,” Mater. Des., 29(1), pp. 205–211. [CrossRef]
Fanning, C. E. , and Blanchet, T. A. , 2008, “ High-Temperature Evaluation of Solid Lubricant Coatings in a Foil Thrust Bearing,” Wear, 265(7–8), pp. 1076–1086. [CrossRef]
Jahanmir, S. , Heshmat, H. , and Heshmat, C. , 2009, “ Assessment of Tribological Coatings for Foil Bearing Applications,” Tribol. Trans., 52(2), pp. 231–242. [CrossRef]
Gupta, S. , and Barsoum, M. W. , 2011, “ On the Tribology of the MAX Phases and Their Composites During Dry Sliding: A Review,” Wear, 271(9–10), pp. 1878–1894. [CrossRef]
Aouadi, S. M. , Gao, H. , Martini, A. , Scharf, T. W. , and Muratore, C. , 2014, “ Lubricious Oxide Coatings for Extreme Temperature Applications: A Review,” Surf. Coat. Technol., 257, pp. 266–277. [CrossRef]
Kozanecka, D. , Kozanecki, Z. , Tkacz, E. , and Lagodzinski, J. , 2015, “ Experimental Research of Oil-Free Support Systems to Predict the High-Speed Rotor Bearing Dynamics,” Int. J. Dyn. Control, 3(1), pp. 9–16. [CrossRef]
Kozanecki, Z. , Kicinski, J. , and Zywica, G. , 2011, “ Numerical Model of the High Speed Rotors Supported on Variable Geometry Bearings,” IUTAM Symposium on Emerging Trends in Rotor Dynamics, New Delhi, India, Mar. 23–26, pp. 217–227.
Klonowicz, P. , Borsukiewicz-Gozdur, A. , Hanausek, P. , Kryllowicz, W. , and Brüggemann, D. , 2014, “ Design and Performance Measurements of an Organic Vapour Turbine,” Appl. Therm. Eng., 63(1), pp. 297–303. [CrossRef]
Kozanecki, Z. , Miazga, K. , Kozanecka, D. , Tkacz, E. , Lagodzinski, J. , and Borkowski, R. , 2011, “ Design, Manufacture, Assembly and Testing of the Second Generation Foil Bearings With Polymer Coatings for a High Speed Turbogenerator of the Micro CHP ORC System,” IMP PAN, Gdansk, Poland, Technical Report No. 228/2011.


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Fig. 4

Geometry of tested foil bearing: (a)—parts of the bearing and (b) dimensions of the bump foil before final forming

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Fig. 3

The way of mounting the measurement sensors on the test rig: (a) accelerometers and eddy current sensors and (b) thermocouples

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Fig. 2

The test rig with two bearing supports and the shaft without disk

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Fig. 1

Three-dimensional model of the foil bearing test stand

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Fig. 10

The test stand with a free foil bearing after removing the support

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Fig. 5

Friction torque diagram depending on the rotational speed in tested foil bearing [31]

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Fig. 6

Top foil abrasive damage caused by measuring elements

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Fig. 7

The way of thermocouples delivering to the top foil

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Fig. 8

Distribution of measurement points along the circumference of the foil bearing

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Fig. 9

The temperature of top foil measured during wearing-in process

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Fig. 11

Graph of top foil temperature measured in various bearing parts, during the study of the bearing with a free bush for different rotational speeds

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Fig. 15

The plot of top foil temperature in relation to rotational speed in various bearing locations, during testing of the rotor with two foil bearings

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Fig. 16

The relative vibration amplitude of the foil bearing journals while the rotor is run up to 20,000 rpm

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Fig. 17

The vibration trajectories of the journals for both foil bearings at 10,000 rpm

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Fig. 18

The vibration trajectories of the journals for both foil bearings at 15,000 rpm

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Fig. 19

The vibration trajectories of the journals for both foil bearings at 20,000 rpm

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Fig. 20

The state of polymer coating on the top foil after many hours of experimental studies

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Fig. 12

The temperature distribution on the top edge of the foil in the visible part of heated journal during bearing operation (photo taken from the right side)

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Fig. 13

The temperature distribution on the top edge of the foil in the visible part of heated journal during bearing operation (photo taken from the left side)

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Fig. 14

The temperature distribution on the top edge of the foil in the visible part of heated journal during bearing operation (temperature measurement inside the hole in the bearing journal)



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