Welding manufacture process method for pump wheel of vertical shaft single-stage and single-suction centrifugal large-sized water pump

Abstract

The invention relates to an advanced process method capable of ensuring the welding manufacture quality of a pump wheel of a vertical shaft single-stage and single-suction centrifugal large-sized water pump. The advanced process method belongs to the fundamental innovation on an assembly welding process of a large-sized water pump and belongs to the essential change on the manufacture method. When the process method provided by the invention is used, the integral assembly size of the pump wheel can be ensured during the first assembly. Outer rings of a lower ring and an upper crown are removed, conditions are created for the welding of welding seams at the water inlet edge of the pump wheel, and the welding seams which cannot be welded before can be welded. The process method has the advantages that an integral assembly three-time dismounting and mounting assembly welding process is adopted for replacing the original integral assembly welding process method, the welding reachability can be greatly improved, the welding seam quality of the pump wheel is ensured, the critical dimension stability of the pump wheel is ensured, and the assembly welding quality of the large-sized pump wheel is obviously improved.

Description

technical field [0001] The invention relates to a welding manufacturing process for producing the impeller of a vertical shaft single-stage single-suction centrifugal large-scale water pump. Background technique [0002] In the past, the impellers of water pumps produced were all medium-sized and small-sized impellers, with simple structures, less twisted blades, and less difficulty in assembly and welding. For large-scale high-lift pump impellers, due to the special requirements of the hydraulic performance on its structure, the blades are seriously twisted, the opening is small, the assembly is difficult, and the welding seams between the blades, the upper crown and the lower ring are not accessible, so the traditional assembly method is adopted. Welding technology cannot complete production and manufacturing. content of the invention [0003] The invention provides an assembly and welding manufacturing process for ensuring the tolerance and quality of the impeller of a...

AI Technical Summary

Problems solved by technology

For large-scale high-lift pump impellers, due to the special requirements of the hydraulic performance on its structure, the blades are seriously twisted, the opening is small, the assembly is difficult, and the welding seams between the blades, the upper crown and the lower ring are not accessible, so the traditional assembly method is adopted. Welding technology cannot complete production and manufacturing

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