Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Andreas Lehn"'
Publikováno v:
Tribology International. 137:113-126
Rotors supported by air foil journal bearings often show distinctive subharmonic oscillations arising from the nonlinear force-displacement relationship of the elastic foil structure. Also, air film induced instabilities may be observed in such beari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eac313bc0e500bd9f392f009840f3c31
https://doi.org/10.1016/j.triboint.2019.02.026
https://doi.org/10.1016/j.triboint.2019.02.026
Publikováno v:
Tribology International. 100:48-59
Performance of air foil thrust bearings is strongly influenced by the stiffness characteristics of the foil structure. In this paper, a fully coupled elasto-gasdynamic model for air foil thrust bearings is presented. Top and bump foil are modeled as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecd494bb0e8ff273f82997fed81d778c
https://doi.org/10.1016/j.triboint.2015.11.011
https://doi.org/10.1016/j.triboint.2015.11.011
Publikováno v:
Tribology International. 93:539-554
The pressure and temperature distribution in gas thrust and oil slider bearings are described by the generalized Reynolds equation according to Dowson and the 3D energy equation. In this paper, two different approaches are presented in order to reduc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3eceff923834c5ae1ac4feda420c78ff
https://doi.org/10.1016/j.triboint.2015.02.030
https://doi.org/10.1016/j.triboint.2015.02.030
Autor:
Andreas Lehn, Bernhard Schweizer
Publikováno v:
Archive of Applied Mechanics. 86:743-760
Reliable high-performance bearings are essential in rotordynamics. As speeds and loads are continuously increased, the demands on bearing technology grow simultaneously. Detailed calculations of bearing characteristics become more important under the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ba40a9f3d5d67af56c440106b9fe639
https://doi.org/10.1007/s00419-015-1059-7
https://doi.org/10.1007/s00419-015-1059-7
Publikováno v:
Journal of Tribology. 139
A detailed analysis of the effective thermal resistance for the bump foil of air foil bearings (AFBs) is performed. The presented model puts emphasis on the thermal contact resistances between the bump foil and the top foil as well as between the bum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93032d24048ec88a2178a8cc5cdcebf1
https://doi.org/10.1115/1.4036631
https://doi.org/10.1115/1.4036631
Publikováno v:
Volume 7A: Structures and Dynamics.
A detailed elastogasdynamic model of a preloaded three-pad air foil journal bearing is presented. Bump and top foil deflections are herein calculated with a nonlinear beamshell theory according to Reissner. The two-dimensional pressure distribution i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77fd0af0aef35326c38741d2b93e2e27
https://doi.org/10.1115/gt2017-63284
https://doi.org/10.1115/gt2017-63284
Autor:
Bernhard Schweizer, Marcel Mahner, Aydin Boyaci, Andreas Lehn, Ioannis Chatzisavvas, Panagiotis Koutsovasilis
Publikováno v:
Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines.
This work investigates the influence of hydrodynamic thrust bearings on the lateral rotor oscillations. Four thrust bearing models are compared in terms of their predictions of the oil-film pressure (Reynolds equation), the oil-film temperature (ener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3164ffe1048146f5209e89f075448c2
https://doi.org/10.1115/gt2016-58168
https://doi.org/10.1115/gt2016-58168
Autor:
Bernhard Schweizer, Andreas Lehn
Publikováno v:
PAMM. 15:573-574
Reliable high performance bearings are essential in rotordynamics. As speeds and loads are continuously increased the demands on bearing technology grow simultaneously. Optimization of bearing characteristics becomes more important under these circum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e07838d520a2540069a369c484b3dc7d
https://doi.org/10.1002/pamm.201510276
https://doi.org/10.1002/pamm.201510276
Publikováno v:
PAMM. 15:405-406
Gas thrust bearings are often used in low-load applications, e.g. in air cycle machines, in micro gas turbines or in rotor systems for fuel cell applications, to support a shaft in axial direction. The pressure and temperature distribution in a gas t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1037e8f6abea4872c5fa56dc37d9f9e
https://doi.org/10.1002/pamm.201510193
https://doi.org/10.1002/pamm.201510193
Publikováno v:
Archive of Applied Mechanics. May2018, Vol. 88 Issue 5, p705-728. 24p.