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Method of Assembling and Welding the Stator Frame of Air-cooled Turbine Generator

A technology for turbogenerators and stator bases, which is applied in the manufacture of motor generators, electromechanical devices, and electric components. It can solve problems that affect the normal use of generators, cannot be stacked in layers, and welding deformation is difficult to control. The effect of shortening the construction period, reducing the difficulty of assembly and welding, and improving the efficiency of assembly and welding

Active Publication Date: 2019-04-19
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The air-cooled generator stator frame is difficult to design in order to achieve reverse ventilation and meet the electrical mechanical performance and transportation restrictions. Due to the structural space limitation, the generator stator frame adopts a three-stage structure (middle section frame, steam end frame, excitation end frame ), the upper surface of the stator base is three intersecting planes at 135 degrees, which are used for the joint connection of the top cover of the base. The assembly size accuracy of the three planes needs to be precisely controlled by welding technology to meet the smooth assembly of the top cover of the base in the later stage ; The structural characteristics of the stator frame of the air-cooled turbogenerator, if the previous welding process is used, it will not be able to meet the dimensional accuracy requirements of the frame, which will affect the normal use of the generator; if the ring plate of the frame is not a full circle structure, it cannot The traditional layer-by-layer assembly and welding process is adopted, and the concentricity of the inner circle of the ring plate and the dimensional accuracy of the three planes intersecting at 135 degrees on the upper surface of the machine base are taken into account during the assembly process; there are few supporting ribs inside the machine base, and the overall rigidity of the machine base The welding deformation is difficult to control, such as the process of welding the outer skin after welding the frame frame, which is no longer suitable for the welding process of the stator frame of the air-cooled generator

Method used

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  • Method of Assembling and Welding the Stator Frame of Air-cooled Turbine Generator

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Embodiment Construction

[0025] The model is: air-cooled 412MVA turbogenerator stator frame is composed of three parts: the middle frame 1, the steam end frame 2, and the excitation end frame 3. The three parts are assembled and welded separately, and then the final assembly is carried out, such as figure 1 shown;

[0026] The middle frame frame 4 is divided into five parts for assembly, and the five parts are assembled and welded separately, and the height of each part is not more than 2 meters. The assembly and welding methods are the same, and they are all vertical assembly and welding, such as figure 2 As shown, the details are: fix the first-layer ring plate 15 of the middle-section machine base on the assembly positioning frame 22, take the first-layer ring plate 15 of the middle-section machine base and the assembly positioning frame 22 as the reference, and assemble and weld the middle-section machine base layer by layer The first layer of ribs 19, the second layer of ring plates 16 of the mi...

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Abstract

The invention provides an air-cooled turbogenerator stator frame assembling and welding method. The air-cooled turbogenerator stator frame is composed of three parts of a middle-section frame (1), a turbine-end frame (2) and an excitation-end frame (3), the three parts carry out assembling and welding respectively, and then, final assembling is carried out. According to the structural characteristics of the stator frame in a new structure, a composite assembly method with vertical assembly and horizontal assembly combined is adopted, the assembling and welding quality of the stator frame is improved, and the operation and the construction are convenient; section assembling and welding are carried out for the stator frame, each section operates independently, parallel assembling and welding are realized, the construction period is shortened, and the assembling and welding efficiency is improved; and the stator frame baseboard is used as an assembly reference, the concentricity accuracy requirements of the whole frame body are ensured, and high-precision assembly of the stator frame is realized.

Description

technical field [0001] The invention relates to a method for assembling and welding a stator frame of a steam turbine generator. Background technique [0002] The air-cooled generator stator frame is difficult to design in order to achieve reverse ventilation and meet the electrical mechanical performance and transportation restrictions. Due to the structural space limitation, the generator stator frame adopts a three-stage structure (middle section frame, steam end frame, excitation end frame ), the upper surface of the stator base is three intersecting planes at 135 degrees, which are used for the joint connection of the top cover of the base. The assembly size accuracy of the three planes needs to be precisely controlled by welding technology to meet the smooth assembly of the top cover of the base in the later stage ; The structural characteristics of the stator frame of the air-cooled turbogenerator, if the previous welding process is used, it will not be able to meet t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/14B23K31/02
CPCB23K31/02H02K15/14
Inventor 段伟赞乔宏来田井成张成军贾瑞燕徐睦忠苏雨公梁洪涛冯滨
Owner HARBIN ELECTRIC MASCH CO LTD
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