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Welding structure and method of multi-layer casing pipe structure

A multi-layer casing and welding structure technology, applied in welding equipment, electron beam welding equipment, tubular objects, etc., can solve the problems of low brazing strength, influence of base material performance, difficulty in meeting product use requirements, etc., to meet Welding requirements, meeting design requirements, optimizing the effect of welding sequence

Inactive Publication Date: 2020-04-10
DONGFANG TURBINE CO LTD
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

In some cases, the manufacturing cannot be completed by processing or casting, and only the welding structure can be used. Generally, the welding of the multi-layer casing structure is completed by brazing, but the brazing process has a certain impact on the performance of the base metal, and the brazing The strength of welding is far lower than that of the base metal, which is difficult to meet the requirements of product use

Method used

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  • Welding structure and method of multi-layer casing pipe structure

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Embodiment 1

[0030] In this embodiment, a welding structure of a multi-layer sleeve structure is specifically provided, including a multi-layer sleeve. In fact, the multi-layer casing may also be three layers, four layers, etc., and the double-layer casing is used as an example to illustrate here.

[0031] It also includes positioning structural parts respectively located on both sides of the double-layer casing. The positioning structural parts are provided with welding grooves that match the casings of each layer. On the other hand, it can form a welding surface between the sleeves of each layer and the positioning structure, so as to cooperate with the electron beam welding equipment for welding. The welding grooves are concentrically arranged, and the ends of the sleeves of each layer are aligned with each welding groove and connected by welding. Since the welding grooves are concentrically arranged, the inner casing 4 After being assembled and positioned with the outer sleeve 3 accor...

Embodiment 2

[0035] Based on the welding structure of the multilayer casing structure provided in Embodiment 1, in this embodiment, a welding method for the multilayer casing structure is also disclosed, the method includes the following:

[0036] (1) The left positioning structural part 6 and the right positioning structural part 1 are respectively arranged on both sides of the multi-layer casing, and the welding slopes are respectively designed on the left positioning structural part 6 and the right positioning structural part 1 according to the structural characteristics of the multi-layer casing mouth size;

[0037] (2) Process a plurality of welding grooves that are concentrically arranged on each positioning structural member according to the welding groove size; since this method takes the welding structure of the layer casing structure in Embodiment 1 as an example, then the left positioning structural member 6. Process the first annular protrusion and the second annular protrusion...

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Abstract

The invention discloses a welding structure and a welding method of a multi-layer casing pipe structure. The welding structure and the welding method belong to the technical field of aero-engine or gas turbine corollary equipment. The welding structure is characterized in that: welding grooves of welding parts on two sides are designed according to structural characteristics of multi-layer casingpipes, and the welding grooves further have an assembling and positioning function so as to ensure the concentricity of all layers of casing pipes; after the welding grooves are machined, the inner casing pipe and a positioning structural part on one side are assembled, welding is completed by adopting an electron beam welding method, the outer casing pipe is assembled on the same side, and welding is completed by adopting the electron beam welding method; and then two layers of casing pipes are assembled with a positioning structural part on the other side at the same time, the inner casing pipe on this side is welded by adopting the electron beam welding method in a manner of penetrating through a certain thickness, and the outer casing pipe on this side is welded by adopting the electron beam welding method, so as to achieve the purposes of realizing high-quality welding of the multi-layer casing pipe structure and meeting the design requirements.

Description

technical field [0001] The invention belongs to the technical field of aero-engine or gas turbine supporting equipment, and relates to multi-layer casing structure welding of related parts of aero-engine or gas turbine, in particular to a welding structure and method of multi-layer casing structure. Background technique [0002] Some high-temperature components of aero-engines or gas turbines have multi-layer casing structures, and there are different medium flows in each layer of casing. Each layer of casing needs to be strictly sealed and have a certain strength to meet the use requirements. In some cases, the manufacturing cannot be completed by processing or casting, and only the welding structure can be used. Generally, the welding of the multi-layer casing structure is completed by brazing, but the brazing process has a certain impact on the performance of the base metal, and the brazing The strength of the welding is far lower than that of the base metal and it is dif...

Claims

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Application Information

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IPC IPC(8): B23K15/00B23K101/06
CPCB23K15/0006B23K15/0053B23K2101/06
Inventor 熊建坤毛桂军徐健黄丽赵鹏飞杨林何芬郑亮亮王喆杨建平王大勇张海波许德星周艳兵聂甫恒王琨
Owner DONGFANG TURBINE CO LTD
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