Method for manufacturing inner barrel of combustor of gas turbine and fixture

Abstract

The invention discloses a method for manufacturing an inner barrel of a combustor of a gas turbine and a welding fixture of the inner barrel. The method and the welding fixture are characterized in that an N-2-1 positioning method and a symmetrical wandering welding method are achieved through the fixture, and welding deformation of thin-walled barrels such as the inner barrel of the combustor of the gas turbine can be controlled within 1 mm.

Description

technical field [0001] The invention relates to a manufacturing method of a steam turbine, in particular to a manufacturing method and tooling for an inner cylinder body of a gas turbine combustor. Background technique [0002] The gas turbine independently developed by our country has a special structural design for its burner, and there is a thin-walled cylinder inside. When manufacturing the nickel-based alloy, the nickel-based alloy sheet is first bent into a cylindrical shape with a plate rolling machine, and there is a longitudinal butt weld, and then the weld is welded together. During the manufacturing process, there are the following technical difficulties: [0003] 1. Due to the complexity and diversity of welding deformation of thin-walled cylinders, and some materials are easily oxidized at high temperatures, it is necessary to rely on a rigid welding tool with back argon protection to control its deformation. In the past, such thin-walled parts were mostly wel...

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Problems solved by technology

[0003] 1. Due to the complexity and diversity of welding deformation of thin-walled cylinders, and some materials are easily oxidized at high temperatures, it is necessary to rely on a rigid welding tool with back argon protection to control its deformation

In the past, such thin-walled parts were mostly welded with piano key pneumatic clamps. The clamping and positioning method of the cylinder is not conducive to controlling the welding deformation, and the insufficient rigidity of the clamp causes the deflection and twist of the cylinder after clamping, which will aggravate the welding deformation, which is very Difficult to meet the design requirements, moreover, the back argon protection of the fixture is difficult and the manufacturing cost is high

[0004] 2. Due to the inherent characteristics of nickel-based alloys, its weldability is very poor, the solder metal in the weld is not easy to wet and expand, the fluidity is poor, and the welding process is difficult

[0005] The above difficulties lead to low qualified rate of the cylinder and high manufacturing cost

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