PELTON-LAUFRAD UND DESSEN HERSTELLUNG

摘要

The rotor of a pelton water turbine is manufactured in that the individual blade bowls (3) are welded together to form a rim and a ring (2) is formed on the inside of the rim, which ring is welded to the outer edge of the wheel web (1) to form the rotor. In an embodiment with two weld seams (4) provided side by side in an axial direction (X), a closed hollow chamber (5) is formed between ring (2) and wheel web (1), which chamber is filled with hydraulic fluid. In the event of a fall in pressure in the hollow chamber (5) due to fatigue cracks an emergency signal is triggered by a pressure sensor (9) and the machine switched off before any damage can occur due to fracturing of the rotor. The ring (2) may be made, for example, by shaping deposit welding.