Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Repair method of gas turbine moving blade and gas turbine moving blade

A technology for gas turbines and blades, which is applied to machines/engines, supporting elements of blades, mechanical equipment, etc., and can solve the problems of prone to crystallization cracks, poor weldability, and prone to defects in welded parts.

Inactive Publication Date: 2011-12-14
KK TOSHIBA
View PDF7 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Gas turbine moving blades are formed of heat-resistant alloys such as Ni-based heat-resistant alloys, so they have excellent high-temperature strength, but poor weldability, and there is a problem that defects are prone to occur in welded parts
Moreover, in the repair of gas turbine moving blades, when surfacing welding using electrodes such as TIG (tungsten inert gas) welding is used, the heat input during welding is relatively large, and defects such as crystal cracks are prone to occur.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Repair method of gas turbine moving blade and gas turbine moving blade
  • Repair method of gas turbine moving blade and gas turbine moving blade
  • Repair method of gas turbine moving blade and gas turbine moving blade

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0028] figure 1 It is a perspective view showing the gas turbine rotor blade 10 with the blade tip 10a cut away. figure 2 yes figure 1 The A-A section of FIG. 1 is a diagram showing the blade tip 10 a of the gas turbine moving blade 10 . image 3 It is a figure which shows the process of the repair method of the gas turbine rotor blade concerning 1st Embodiment of this invention. Figure 4 ~ Figure 5 , Figure 7 ~ Figure 8 It is used to explain the steps of the repair method of the gas turbine rotor blade according to the first embodiment of the present invention, and shows figure 1 A diagram of the A-A section. Figure 6 It is a diagram for explaining the laser welding method. Among them, in Figure 1 ~ Figure 2 , Figure 4 ~ Figure 5 In , the cut part is indicated by a dotted line.

[0029] In addition, in the description of the method of repairing the gas turbine moving blade according to the first embodiment of the present invention, the example in which the blade...

no. 2 Embodiment approach

[0058] In the gas turbine moving blade repair method of the second embodiment according to the present invention, the difference from the gas turbine moving blade repair method of the first embodiment is that the build-up welding process consists of the first build-up welding process and the second build-up welding process. The surfacing welding process constitutes, and other repair methods are the same. Therefore, here, mainly, the build-up welding process will be described.

[0059] Figure 9 It is a figure which shows the process of the repair method of the gas turbine rotor blade of 2nd Embodiment which concerns on this invention. Here, the same reference numerals are assigned to the same steps as those of the gas turbine rotor blade repair method of the second embodiment, and overlapping descriptions are omitted or simplified. Moreover, as in the case of the gas turbine blade repair method of the first embodiment, in the case of repairing the gas turbine blade 10 that d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method of repairing a gas turbine moving blade capable of preventing defects such as cracks during overlay welding and performing highly reliable repairs when repairing a cut portion of a blade front end of a gas turbine moving blade, and the method for repairing Methods The gas turbine moving blades obtained after repairing. The repair method of the gas turbine rotor blade includes: removing the cut portion at the tip of the blade, and processing the tip of the blade into a flat cut portion removal process; using a laser to make the tip of the blade that is more ductile than the base material constituting the gas turbine rotor blade into a plane. The powder of the surfacing material is melted, and the surfacing is performed in multiple layers to form a surfacing welding process of a predetermined thickness; the shape of the surfacing part is processed into the same shape as the original blade tip before the reduction occurs The forming process; and the heat treatment process to remove the residual deformation caused by laser welding in the surfacing welding process.

Description

technical field [0001] Embodiments of the present invention relate to a method of repairing a moving blade of a gas turbine, and more particularly, to a method of repairing a moving blade of a gas turbine for repairing oxidation reduction (meat loss) occurring at the tip of the moving blade of a gas turbine, and The gas turbine moving blade obtained after repairing by this repairing method. Background technique [0002] The moving blades of the gas turbine are exposed to the high-temperature gas above 1000°C discharged from the combustor. Therefore, cooling is required for an effective design life cycle. Generally, the cooling of the gas turbine rotor blade is performed by supplying a part of the compressed air extracted from the compressor from the lower end of the implanted portion of the gas turbine rotor blade. The cooling air supplied to the inside of the gas turbine blade is released to the outside of the blade through a cooling passage formed in the blade-shaped por...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B23P6/00B23K26/34B23K35/28B23K31/00F01D5/28F01D25/00
CPCF01D5/005B23P6/007
Inventor 伊藤胜康日野武久酒井义明
Owner KK TOSHIBA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com