Method for manufacturing 300 MW stage heavy fuel machine nozzle swirler assembly

Abstract

The invention relates to a method for manufacturing a 300 MW stage heavy fuel machine nozzle swirler assembly, solves the problem of low production efficiency of an existing method for manufacturing a300 MW stage heavy fuel machine nozzle swirler assembly, and belongs to the technical field of heavy fuel machine manufacturing. The method comprises the following steps that 1, three tools are manufactured, the assembly welding sequence of each part is determined, one end of a first tool with a large radius and a second tool are used to assemble a swirler and a front joint, the swirler is coaxial with and makes contact with the front joint, and simultaneously the swirler and an outer ring are assembled, and contact positions of the swirler and the front joint are welded; 2, the swirler is overturned, one end of the first tool with a small radius is used to make coaxially contact with a corrugated assembly with the swirler, and welding is performed; 3, a rear joint sleeves the end of thefirst tool with the small radius and penetrates through the corrugated pipe assembly, the rear joint is coaxial with the swirler by using a third tool, and contact positions of the rear joint and theswirler are welded; 4, the outer ring and a front ring are welded to the swirler; and 5, a welding positioning fixture is removed after the welding is completed.

Description

technical field [0001] The invention relates to a 300MW heavy-duty gas turbine nozzle swirler assembly, in particular to a manufacturing method thereof, and belongs to the technical field of heavy-duty gas turbine manufacturing. Background technique [0002] The 300MW heavy-duty gas turbine nozzle swirler assembly is a welded structure of multi-layer sleeved tube parts, which will affect the manufacturing efficiency of the product if the production sequence is not strictly defined. Because the structure is mostly welded structure of thin-walled parts, the thin-walled parts will be affected by the welding temperature field during the welding process, which will generate internal stress and affect the deformation of the workpiece. However, the rigidity of the thin-walled parts is not enough, and the deformation is particularly serious, and the drawing design is very important. The manufacturing accuracy such as the concentricity of the product is extremely strict (0.3mm). If c...

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Problems solved by technology

[0003] Aiming at the problem that the production efficiency of the existing method for manufacturing 300MW heavy-duty gas turbine nozzle swirler assembly is not high, the present invention provides a manufacturing method of 300MW heavy-duty gas turbine nozzle swirler assembly that improves the one-time pass rate and production efficiency

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