Rok 2023

• Experimental Verification of the CFD Model of the Squeeze Film Lifting Effect

  Publikacja

  • B. Bastian
  • R. Gawarkiewicz
  • M. Wasilczuk
  • M. Wodtke

  - Applied Sciences-Basel - Rok 2023

  Abstract: The presented study shows the results of the research into the squeeze film levitation phenomena. The system introduced in the investigation is composed of a vibrating surface, air squeeze film, and the surface of the body freely suspended over the film. The use of the CFD (Computational Fluid Dynamics) model used in the system allows us to determine the steady state, periodic behavior of the air film (described by Navier–Stokes,...

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Rok 2019

• A SEARCH OF AN INDUCER GEOMETRY THAT IS BENEFICIAL FOR LIFTING PARAMETERS OF A LIFTED OBJECT OF A SELECTED SHAPE

  Publikacja

  • B. Bastian
  • R. Gawarkiewicz

  - TRIBOLOGIA - Rok 2019

  The literature describes acoustic levitation phenomena with the utilization of air squeeze film between the vibrating inducer and the lifted object. The objective of the study is to determine the shape of the inducer with vibration characteristics that would allow the levitation of an object of the assumed geometry. In this paper, the influence of the dimension ratio of the inducer on the frequency of the first mode of vibration...

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Rok 2018

• Analysis of Failures of High Speed Shaft Bearing System in a Wind Turbine

  Publikacja

  • M. Wasilczuk
  • R. Gawarkiewicz
  • B. Bastian

  - Rok 2018

  During the operation of wind turbines with gearbox of traditional configuration, consisting of one planetary stage and two helical stages high failure rate of high speed shaft bearings is observed. Such a high failures frequency is not reflected in the results of standard calculations of bearing durability. Most probably it can be attributed to atypical failure mechanism. The authors studied problems in 1.5 MW wind turbines of...

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• The use of plate springs for preloading of a system of tapered roller bearings of a wind turbine gearbox

  Publikacja

  • B. Bastian
  • M. Wasilczuk

  - TRIBOLOGIA - Rok 2018

  The use of preloaded tapered roller bearings in wind turbine drive systems allows a transfer of load in the case of high variations of axial forces. The examined bearing system, a modification of a current design, consists of a pair of different sized bearings. Previous study showed the high sensitivity of tapered roller bearings on the existing radial interference. Dimensional tolerances used in the original design do not allow...

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Rok 2017

• THE INFLUENCE OF HOUSING ARRANGEMENT AND INTERFERENCE ON PRELOAD AND THEORETICAL LIFETIME OF A SYSTEM OF TAPER ROLLER BEARINGS OF A HIGH SPEED SHAFT OF A WIND TURBINE GEARBOX

  Publikacja

  • B. Bastian
  • R. Gawarkiewicz
  • M. Wasilczuk

  - TRIBOLOGIA - Rok 2017

  A system of two taper roller bearings can carry loads with a high ratio of axial load to radial load. Such a system was proposed for a wind turbine gearbox following the poor durability of original bearing design with the aim of increasing durability. Because of size limits, a proposed system is composed of two different taper roller bearings. Standard manufacturers’ catalogues do not provide information on recommended preload...

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