Evgeny Kuznetsov

Namn: Evgeny Kuznetsov
Enhet: Institutionen för teknikvetenskap och matematik
Avdelning: Maskinelement
Email: evgeny.kuznetsov@ltu.se
Rum E839

Energy efficient journal bearings lubricated by environmentally adapted oils

Project setup:
Bearings supporting rotating shafts are an important machine component that has a strong influence on the overall efficiency and reliability of power installations. Let us consider a steam turbine as an example.

For a 100MW steam turbine power loss in the bearings accounts for 0.4 % or 400 kW. If the power loss is reduced by 50 % an additional power of 200 kW can be produced. Considering the number of steam turbines used worldwide in the nuclear and solar power stations, the bearing efficiency improvement would lead to a significant saving of energy.

There are several ways the bearing can be optimized for the specific task. In the project we investigate the influence of the environmentally adapted lubricants and new materials applied to the bearings. While the main goal is to achieve 50% power loss reduction, we also investigate an influence of modern materials on other bearing characteristics, like maximum oil temperature, minimum oil film thickness and bearing stability.

Results:
The advanced numerical model is developed and used for the bearing analysis. Test rig experimental data is used for the model calibration and verification. Numerical analysis shows that by applying new environmentally adapted lubricants and polymer materials in bearing design it is possible to
  • improved environmental performance
  • improved dynamic characteristics
  • improved steady state characte ristics with more than 50% lower power loss

Results shown at WTC 2009

WTC2009

[http://www.ltu.se /cms_fs/1.12324!/ekuznetsovwtc2009.pdf]

Publikationer (9)

  1. THD analysis of compliant journal bearings considering liner deformation

    Kuznetsov, E. ,Glavatskih, S.& Fillon, M.2011 i :Tribology International .44 ,12 ,s. 1629-1641.14 s.

    Publikation: Forskning - peer-review›Tidskriftsartikel

  2. Powerplant lubricant selection for improved efficiency and environmental impact reduction

    Simmons, G. F. ,Kuznetsov, E.&Glavatskih, S.2010

    Publikation: Forskning - peer-review›Konferensbidrag

  3. THD analysis of a compliant journal bearing considering liner deformation

    Kuznetsov, E. ,Glavatskih, S.& Fillon, M.2009 i:Proceedings of the World Tribology Congress 2009: Sunday 6th to Friday 11th, September, 2009, Kyoto, Japan . Tokyo:Japan Society of Tribologists ,s. 216.1 s.

    Publikation: Forskning›Abstract i konferenspublikation/proceedings

  4. Dynamic characteristics of a 2 axial groove journal bearing with a PTFE lining

    Kuznetsov, E.&Glavatskih, S.2008 i:Lubricants, materials and lubrication engineering: 16th International Colloquium Tribology ; January 15 - 17, 2008 in Stuttgart/Ostfildern, Germany. Bartz, W. J. (red.). Ostfildern :Techn. Akad. Esslingen

    Publikation: Forskning - peer-review›Artikel i konferenspublikation/proceedings

  5. Stability analysis of a compliant lemon bore journal bearing

    Kuznetsov, E.&Glavatskih, S.2008 i:Proceedings of the 9th Biennial ASME Conference on Engineering Systems Design and Analysis, ESDA 2008: July 7-9, 2008, Haifa, Israel. New York, NY :American Society of Mechanical Engineers ,Vol. 3 ,s. 561-568.8 s.

    Publikation: Forskning - peer-review›Artikel i konferenspublikation/proceedings

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