Torsional Vibrations at Guide-Vane Shaft of Pump–Turbine Model

Article type: Research Article

Authors: Predin, Andrej

Affiliations: University of Maribor, Smetanova 17, SI-2000, Maribor, Slovenia

Abstract: This article focuses on the problem of guide-vane vibrations of reversible pump–turbines, especially, in the pump mode. These vibrations are transmitted to the guide-vane shaft torque. The guide-vane vibrations are caused by the impeller exit flow, which has a turbulent and partly nondeterministic property. Experimentally determined flow velocities at the impeller exit are given. The mathematical models for theoretical torsional vibration prediction formulated using linear and nonlinear differential equations are presented. The results of theoretical calculations are compared with measurement results. The possibility of transferring the parameters from the model to the prototype is discussed.

DOI: 10.3233/SAV-1997-4302

Journal: Shock and Vibration, vol. 4, no. 3, pp. 153-162, 1997