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Assembly welding technological method of ultra-supercritical coal million-kilowatt steam turbine generator stator base

A technology for a steam turbine generator and a stator frame, which is applied in the field of assembly and welding technology for the stator frame of an ultra-supercritical coal-fired million steam turbine generator, can solve problems such as high cost, achieve high risk, improve product quality, and improve product quality. The effect of reducing the influence of dimensional accuracy

Inactive Publication Date: 2016-07-27
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a large number of temporary support tools are used, it is still impossible to fundamentally solve the problem of flatness deformation of a single partition and the shrinkage problem between partitions of the machine base. It will take a lot of time and manpower to repair

Method used

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  • Assembly welding technological method of ultra-supercritical coal million-kilowatt steam turbine generator stator base
  • Assembly welding technological method of ultra-supercritical coal million-kilowatt steam turbine generator stator base

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Experimental program
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Embodiment Construction

[0010] (1) Use CNC gas cutting machine, semi-automatic gas cutting machine or shearing machine to blank, flatten, form and sandblast the semi-finished parts required for machine base assembly according to the requirements of the drawings; (2) According to the requirements of the drawings, the end plates, partitions and Parts such as the inner ring are sub-assembled and welded, and CNC machining is carried out after completion; (3) All pipelines are prepared and bent according to the requirements of the drawings, the inside of the pipelines is cleaned, and sealed with adhesive tape and pipe caps; (4) Skeleton assembly: such as figure 1 Put the axial support 1 and the top side plate on the platform, adjust the unevenness and fix them by lap welding, place the steam and excitation end plates 2 on the two ends of the axial support 1 according to the size of the drawing, adjust the verticality and fix them by lap welding, and pass The end plates on both sides determine the horizonta...

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Abstract

The invention discloses an assembly welding technological method of an ultra-supercritical coal million-kilowatt steam turbine generator stator base. The assembly welding technological method comprises the steps of carrying out cutting, flattening, molding and sand blasting on semi-finished products; preparing materials according to the requirement of a drawing; putting an axial support and a top side plate on a platform; assembling partition plate rib plates layer by layer from the exciter end with the horizontal center adopted as the datum; adjusting the distance tolerances and concentricity of partition plates in each layer, and carrying out overlap welding for fixation; assembling external skin and exterior trimming parts; after overlap welding for fixation, welding and cleaning the entire base; after cleaning, carrying out sand blasting on the entire base; after assembly welding, mounting a wind shield; and after weld joints and the size are inspected to be qualified, carrying out painting operation. The assembly welding technological method has the advantages that the technological process is reasonable and concise, products with relatively high quality can be provided, the production efficiency is high, the manufacturing cost is low, and the like.

Description

technical field [0001] The invention relates to an assembly and welding process method for a stator frame of an ultra-supercritical coal-fired million-turbine generator. Background technique [0002] In the past, the manufacturing process of the stator base of the million-dollar turbogenerator was to put the excitation end plate at the assembly station and level it, and then adopt the vertical assembly method to assemble the semi-finished parts such as the partition plate, the rib plate and the outer skin layer by layer. After the assembly and welding is completed, place the machine base horizontally, and then perform the assembly and welding work of the exterior parts. However, this method has many disadvantages. The total height of the machine base is 11,000mm. The high-altitude operation during the assembly of the frame and skin is extremely difficult and dangerous. The concentricity of the machine base partition is difficult to control, and the flatness of the upper cool...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 佟本华李凤超杨福明周晓龙苏雨公
Owner HARBIN ELECTRIC MASCH CO LTD
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