A common problem with hydraulic turbines is the rupture of turbine horizontal shaft in the area between the rotor and its bearing, caused by different stresses , as well as problems caused by excessive bearing wear, vibration caused by instability of lubricant film from bearings, lubrication supply interruption of hydrodynamic bearings, gripping, decrease of bearing stiffness due to fatigue of supporting structures. In addition, during operation, vibration appear depending on exciter forces or bearing type. In present paper we present an analysis of vibrations measured on a subassembly found at hydraulic turbines. For the experimental subassembly was used a straight-lined shaft, having variable cross-section, and a sliding type bearing. The tests were made for bearings of different dimensions and materials. Vibrations were measured on two axes for established case studies and results were compared.
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 Haţiegan C. Pădureanu I. Jurcu M. Nedeloni M.D. HamatC.O. Chioncel C.P. Trocaru S. Vasile O. Bădescu O. Micliuc D. Nedeloni L. Băra A. & Haţiegan L. Vibration analysis of a hydro generator for different operating regimes IOP Conference Series: Materials Science and Engineering Hunedoara 2016 Vol.163 Issue 1 2017.
 Pădureanu I. Jurcu M. Campian C.V. & Haţiegan C. Determination of the performance of the Kaplan hydraulic turbines through simplified procedure IOP Conference Series: Materials Science and Engineering Hunedoara 2017 Vol. 294 Issue 1 2018.
 Haţiegan C. Nedeloni M. D. Tufoi M. Protocsil C. & Răduca M. Modal Analysis Of Natural Frequencies And Mass Participation Coefficients Of Simply Supported Thin Plates With Damages Constanţa Maritime University Annals Vol. 19 2013.
 Haţiegan C. Gillich G. R. Gillich N. Tufoi M. & Răduca M. Modal Analysis of Thin Plates with Damage Simply Supported on all Edges Analele Universităţii “EFTIMIE MURGU” Anul XX Issue 1 Reşiţa 2013.
 Tufoi M. Gillich G. R. PraisachZ. I. KorkaZ. I. & Haţiegan C. Modal Analysis of a Butterfly Valve with Different Stiffening Elements Romanian Journal of Acoustics & Vibration Vol. XIII Issue 1 2016.
 Haţiegan C. Tufoi M. Răduca E. Protocsil C. & Mituleţu C. Modal Analysis Through Solidworks Software Of Clamped Thin Plates With Damages Constanţa Maritime University Annals Anul XIV Vol. 19 pp. 121-124 2013.
 Tufoi M. Haţiegan C. Vasile O. & Gillich G. R. Dynamic Analysis of Thin Plates with Defects by Experimental and FEM Methods Romanian Journal of Acoustics & Vibration Vol. X Issue 2 2013.
 Haţiegan C. Molnar M. Trocaru S. Pădureanu I. Jurcu M. & Ilie F. Modeling and Simulation of Thermal Analysis of a Teflon Coated Plate International Conference Knowledge-Based Organization 2016 Vol. 22 Issue 3 July 2016.
 Haţiegan C. Gillich G. R. Popovici G. & Haţiegan L. The Influence of Temperature Changes on the Eigen-Frequencies and Mode Shapes for Rectangular Plates Clamped on the Contour International Conference Knowledge-Based Organization 15-17.06.2017 Land Forces Academy “Nicolae Balcescu” Sibiu Vol. 23 Issue 3 2017.
 Sorohan S. Roşu C.A. Blumenfeld M. Vasiliu N. & Pârăianu C. Cercetări Asupra Rezistenţei Arborilor Turbinelor Bulb cu Metoda Elementelor Finite Editura Tehnică Bucureşti 2000.
 Marcus R. Self-lubricating Bearings for Heavy-Duty Applications Stadtallendorf 2010.
 Haţiegan C. Chioncel C.P. Răduca E. Popescu C. Pădureanu I Jurcu M. Bordeaşu D. Trocaru S. Dilertea F. Bădescu O. Terfăloagă I.M. Băra A. & Haţiegan L. Determining the operating performance through electrical measurements of a hydro generator IOP Conference Series: Materials Science and Engineering Hunedoara 2016 Vol. 163 Issue 1 2017.
 Jurcu M. Pădureanu I. Padeanu L. Augustinov L. & Haţiegan C. Tests Regarding the Transitory Regimes of Putting off Load of the Hydroagregate Analele Universităţii “Eftimie Murgu” Anul XXII Issue 2 Reşiţa 2015.
 Stroia M.D. Mănescu T. Ş. & Toader M. Vibrations Induced by Friction Forces in Dynamic Systems Romanian Journal of Acoustics & Vibration Vol. VII Issue 2 2010.
 Pădureanu I. Jurcu M. Augustinov L. Haţiegan C. Răduca E. & Padeanu L. Optimisation of the Start-up and Operation Regimes of Cooling Water Pumps of a High-Power Hydro Generator Analele Universităţii “Eftimie Murgu” Anul XXII Issue 1 Reşiţa 2015.
 Pădureanu I. Jurcu M. Augustinov L. Haţiegan C. Răduca E. Implementation of an Automatic System for the Monitoring of Start-up and Operating Regimes of the Cooling Water Installations of a Hydro Generator Analele Universităţii “Eftimie Murgu” Anul XXII Issue 1 Reşiţa 2015.
 Haţiegan C. Gillich E. V. Vasile O. Nedeloni M. D. & Pădureanu I. Finite Element Analysis of thin plates clamped on the rim of different geometric forms. Part I: Simulating the Vibration Mode Shapes and Natural Frequencies Romanian Journal of Acoustics & Vibration Vol.XII Issue 1 2015.
 Haţiegan C. Gillich E. V. Vasile O. Nedeloni M. D. Jurcu M. & Magheţi P. Finite Element Analysis of thin plates clamped on the rim of different geometric forms. Part II: The Absolute and Relative Variation of Natural Frequencies Romanian Journal of Acoustics & Vibration Vol.XII Issue 1 2015.
 Mănescu T. Ş Stroia M. D. Afronie E. Chivu A. & Pomoja F. Causes of Vibrations Occurrence During Operation of Industrial Machinery Annals of DAAAM for 2010 & Proceedings of the 21st International DAAAM Symposium Vienna Austria 2010.
 Băra A. Nedelcu D. Haţiegan C. Bejinariu A. C. & Nedeloni L. General aspects of speed increaser gearboxes IOP Conference Series: Materials Science and Engineering Hunedoara 2017 Vol. 294 Issue 1 2018.
 Stroia M. D. Derbac D. Hatiegan C. & Cîndea L. Thermostat Model with Arduino Uno Board for Controlling a Cooling System Annals of Constantin Brâncuşi University of Târgu-Jiu - Engineering Series No. 3 2018.