Manufacturing process method of sectioned rotating wheel of large impulse water turbine

Abstract

The invention discloses a sectioning manufacturing process method of a rotating wheel of a large impulse water turbine. According to a sectioning structure of the rotating wheel, manufactured according to sectioning, of the large impulse water turbine, a rotating wheel sectioning combined welding seam is welded in a hydropower station by adopting narrow-gap submerged-arc welding, a double-side U-shaped narrow-gap groove is adopted as the groove type, compared with a single-side U-shaped narrow-gap groove, the metal filling amount of the welding seam is reduced by 20%, and compared with common submerged-arc welding, the metal filling amount of the welding seam is reduced by 60%; and tungsten electrode inert gas shielded welding and consumable electrode gas shielded welding are adopted for welding the combined welding seam at the end of a sectioned face water bucket of the rotating wheel, the welding seam within the range of 1-40 mm on the surface layer of the positive pressure surface of the welding seam water bucket is welded through tungsten electrode inert gas shielded welding, the metal impact toughness value of the surface layer welding seam is larger than 100 J at the temperature of 0 DEG C, the service life of the combined welding seam is prolonged easily, and the welding seam body part is welded by adopting the consumable electrode gas shielded welding process method so as to be beneficial to improving the welding production benefit.

Description

technical field [0001] The invention relates to the field of impact water turbine generators, in particular to a manufacturing process for a split-lobe runner of a large impact water turbine. Background technique [0002] With the development of high-head and large-capacity impact turbine generator sets, the impact runner as the core component of the impact turbine, in order to solve the problem that the raw materials of the runner cannot be forged as a whole and the road transportation capacity limits the overall transportation of the runner, a new method is proposed. A large-scale impulse turbine runner made of split petals, the runner is divided into the first single lobe of the runner and the second single lobe of the runner through the split petal surface, and the runner water bucket located on the split petal surface is divided into the first water bucket end, second bucket end, first bucket root and second bucket root. The invention provides a manufacturing process m...

AI Technical Summary

Problems solved by technology

[0002] With the development of high-head and large-capacity impact turbine generator sets, the impact runner as the core component of the impact turbine, in order to solve the problem that the raw materials of the runner cannot be forged as a whole and the road transportation capacity limits the overall transportation of the runner, a new method is proposed. A large-scale impulse turbine runner made of split petals, the runner is divided into the first single lobe of the runner and the second single lobe of the runner through the split petal surface, and the runner water bucket located on the split petal surface is divided into the first water bucket end, second bucket end, first bucket root, and second bucket root

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