27-53 CONSIDERAŢII TEORETICE PRIVIND CALCULUL DE REZISTENŢĂ ŞI AL DEFORMAŢIILOR CAMERELOR ROTOARELOR TURBINELOR AXIALE ORIZONTALE (BULB)
THEORETICAL ASPECTS REGARDING THE STRENGTH CALCULATION AND THE DEFORMATIONS OF THE HORIZONTAL TURBINE RUNNER CHAMBERS
This paper presents main theoretical considerations regarding the strength calculation and the deformations of the horizontal axial turbine runner chambers – upstream bulb. The most suitable functional and constructive solutions – for those bulb turbines which designed at Hydro-Engineering, the runner chamber has the lower half embedded in the concrete, and the upper half of this is fixed through a bolted threaded connection and threaded studs. The strength calculation of the deformations is made only for the upper half of the runner chamber.
The establishment of the fundamental equations regarding the strength and deformation calculations have been made taking into account the theory of the plane and curved plates of S. Timoshenko. For solving the equations and avoiding the in determinations it has been used the energetic method (Castigliano’s method). Considering the stressing types that are applied to the upper half of the runner chamber in the paper, it is shown the forces and moments that is stressing the threaded connection of the upper half in relation to the lower half which embedded in the concrete
Keywords: turbine, runner, deformation, bulb
Cuvinte cheie: turbină, rotor, deformaţie, bulb