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Vol.26, No.2, 2026, pp. 213–216 |
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RECONSTRUCTION OF DAMAGED ROTOR SPOKE IN RHPP BAJINA BAŠTA - PART II: WELDING Aleksandar Sedmak1*
1) University of Belgrade, Faculty of Mechanical Engineering, Belgrade, SERBIA *email: asedmak@mas.bg.ac.rs , A. Sedmak https://orcid.org/0000-0002-5438-1895 ; T. Maneski https://orcid.org/0000-0001-9717-3669 2) GOŠA Montaža, Belgrade, SERBIA 3) Innovation Centre of the Faculty of Mechanical Engineering, Belgrade, SERBIA S. Sedmak https://orcid.org/0000-0002-2674-541X
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Abstract During the rehabilitation of the Reversible Hydro Power Plant ‘Bajina Bašta’ in 2025, cracks were discovered in rotor spoke ribs. Through an analysis of rotor spokes it was determined that cracking was caused by unexpected weight overloading. It was also concluded that cracks cannot be grooved and surface welded due to limited space. Thus, a different approach had to be taken, leading to the reconstruction of the rotor spoke. To do so, it was necessary to strengthen the rotor by new additional spoke ribs that were welded with the existing, damaged ones, and rotor spoke. Keywords: • rotor shell • cracks • reconstruction • welding |
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full article (500 kB)
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