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An automatic repair method for steam turbine blades

A steam turbine blade and repair method technology, applied in the field of steam turbine blade repair, can solve problems such as difficult remanufacturing, achieve standardized damage repair, efficient on-site repair and remanufacturing, and improve on-site repair efficiency

Active Publication Date: 2021-07-16
DONGFANG ELECTRIC WUHAN NUCLEAR EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problem that the on-site repair and remanufacture of existing steam turbine blades are difficult, the purpose of the present invention is to provide an automatic repair method for steam turbine blades. It realizes cutting and remanufacturing of damaged blades, and realizes fast, efficient and high-quality solutions to problems such as blade water erosion damage repair and blade repair and upgrading through step by step in each link, and unifies blade defect removal and welding. A Simple and Efficient Method for Reliable Repair and Remanufacture of Damaged Blades

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides an automatic repair method for steam turbine blades. When the blade base has serious defects, the automatic repair process of this embodiment includes the following steps for on-site repair of all last-stage blades of the steam turbine + thermal spray coating treatment:

[0040] 1) Equipment preparation: place the large-tonnage roller bracket in a safe and stable position in the power plant, adjust the height of the roller bracket and the opening distance of the bracket, hoist the integral rotor including blades on the roller bracket, and adjust it to be in a horizontal state. The connection plate and the coupling rigidly fix one end of the rotor shaft with the power plate of the roller bracket, and at the same time connect the cables of the ABB welding robot, the roller bracket and the cutting equipment, and check that there is no abnormality after power-on;

[0041] 2) Pretreatment before welding: select the blade with the most damage as the cu...

Embodiment 2

[0065] This embodiment provides an automatic repair method for steam turbine blades, which is used to remanufacture the entire level of blades, that is, repair the damaged blade base to meet the requirements, and then perform Stellite alloy surfacing on the blades; this embodiment The automated repair process includes the following steps:

[0066] 1) Equipment preparation: place the large-tonnage roller bracket in a safe and stable position in the power plant or workshop, adjust the height and opening position of the roller bracket, hoist the whole rotor with blades on the roller bracket, adjust the rotor to be in a horizontal state, and use The connection plate and the coupling rigidly fix one end of the rotor shaft to the power plate of the roller bracket, and at the same time connect the cables of the robot, the roller bracket and the cutting equipment, and check that there is no abnormality after power-on;

[0067] 2) Pretreatment before welding: select the blade with the ...

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Abstract

The invention discloses an automatic repairing method for steam turbine blades, which relates to the technical field of steam turbine blade repairing. →Gap stacking planning→Printing and stacking→Heat treatment→Non-destructive testing→Processing→Scanning, use the robot 3D scanning system to scan the determined blade, and then obtain the 3D model of the blade through software processing, define the area to be cut and path to remove all damaged parts or establish areas to be remanufactured; by implementing this technical solution, problems such as blade water erosion damage repair and blade repair and upgrade can be solved quickly, efficiently and with high quality, which simplifies the processing technology compared to traditional machining. , which greatly improves the on-site processing efficiency of blades, and determines a new direction for efficient and intelligent repair and remanufacturing of turbine rotor blade damage.

Description

technical field [0001] The invention relates to the technical field of repairing steam turbine blades, in particular to an automatic repairing method for steam turbine blades. Background technique [0002] Water erosion of steam turbine blades has always been a major technical problem for those skilled in the art. Once the blades are damaged by water erosion, it will not only increase the energy consumption of the unit, reduce efficiency, but more importantly, the safety risk will increase dramatically. There are mainly two treatment methods for the current water erosion of steam turbine blades: one is to replace the steam turbine blades, but the cost of this method is very high; the other is to repair or remanufacture. [0003] At present, the on-site repair and remanufacturing of the last stage blade of the steam turbine mainly refers to the repair, and it is also mainly carried out manually according to the relevant national standards or issued industry standards. The rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00
CPCB23P6/002
Inventor 陈兴东朱永祥熊建坤赵鹏飞郭洋黄滔裴伟平黄岚王涛王大勇黄丽徐健张海波
Owner DONGFANG ELECTRIC WUHAN NUCLEAR EQUIP
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