Rear wall protection method for taking ice-carbon powder mixer as turbine blade for laser processing

A turbine blade and laser processing technology, which is applied to turbines, metal processing, laser welding equipment and other directions, can solve the problems of complex preparation process, high cost, easy agglomeration of nanoparticles, etc., and achieves easy filling process, low cost and simple preparation process. easy effect

Inactive Publication Date: 2015-07-29
XI AN JIAOTONG UNIV
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, laser protection technology is mainly aimed at anti-laser reinforcement of human eyes and optical sensors. The protection principles include laser protection technology based on the principle of linear optics, laser protection technology based on the principle of nonlinear optics, and laser protection technology based on the principle of phase change. The laser protection technology based on the principle of linear optics is to coat a layer of film on the lens to selectively increase the reflectivity of a certain wavelength of light. This method is only applicable to lenses, not to turbine blades; based on nonlinear light The materials used in laser protection technology...

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
  • Rear wall protection method for taking ice-carbon powder mixer as turbine blade for laser processing
  • Rear wall protection method for taking ice-carbon powder mixer as turbine blade for laser processing
  • Rear wall protection method for taking ice-carbon powder mixer as turbine blade for laser processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using ice-carbon powder mixture as a back wall protection method for laser machining of turbine blades includes the following steps:

[0023] 1) mixing carbon powder particles with a particle size range of 1-6 μm and water to prepare a carbon-water suspension with a mass fraction of carbon of 62%;

[0024] 2) Plug the hole at the bottom of the turbine blade with a rubber stopper, then pour the carbon-water suspension into the blade flow channel through the hole at the top of the turbine blade until it is full;

[0025] 3) Place the turbine blades filled with the carbon-water suspension in a freezer at a temperature of -12°C to freeze. After the water in the carbon-water suspension of the turbine blades freezes into ice, the filling of the protective material is completed;

[0026] 4) Place the turbine blade in an environment of -3°C, and use pulsed laser irradiation to drill holes. The process parameters of pulsed laser drilling are: frequency 70Hz, pulse width 0.2ms, p...

Embodiment 2

[0030] Using ice-carbon powder mixture as a back wall protection method for laser machining of turbine blades includes the following steps:

[0031] 1) mixing carbon powder particles with a particle size range of 9-17 μm and water to prepare a carbon-water suspension with a mass fraction of carbon of 3%;

[0032] 2) Plug the hole at the bottom of the turbine blade with a rubber stopper, then pour the carbon-water suspension into the blade flow channel through the hole at the top of the turbine blade until it is full;

[0033] 3) Place the turbine blades filled with the carbon-water suspension in a freezer at -3°C to freeze. After the water in the carbon-water suspension of the turbine blades freezes into ice, the filling of the protective material is completed;

[0034] 4) Place the turbine blade in an environment less than 0°C, and use pulsed laser irradiation to drill holes. The process parameters of pulsed laser drilling are: frequency 70Hz, pulse width 0.2ms, peak power 16...

Embodiment 3

[0038] Using ice-carbon powder mixture as a back wall protection method for laser machining of turbine blades includes the following steps:

[0039] 1) mixing carbon powder particles with a particle size range of 5-10 μm and water to prepare a carbon-water suspension with a mass fraction of carbon of 20%;

[0040] 2) Plug the hole at the bottom of the turbine blade with a rubber stopper, then pour the carbon-water suspension into the blade flow channel through the hole at the top of the turbine blade until it is full;

[0041] 3) Place the turbine blades filled with the carbon-water suspension in a freezer at -8°C to freeze. After the water in the carbon-water suspension of the turbine blades freezes into ice, the filling of the protective material is completed;

[0042] 4) Place the turbine blade in an environment of -4°C, and use pulsed laser irradiation to drill holes. The process parameters of pulsed laser drilling are: frequency 70Hz, pulse width 0.2ms, peak power 16KW; ...

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a rear wall protection method for taking an ice-carbon powder mixer as a turbine blade for laser processing. The rear wall protection method comprises the following steps: carbon powder and water are mixed and stirred to prepare carbon water suspension; a hole in the bottom end of the turbine blade is plugged, and the carbon water suspension is poured into a blade runner through a hole in the top end of the turbine blade; the turbine blade filled with the carbon water suspension is arranged into a freezing chamber for freezing; after the water in the carbon water suspension of the turbine blade is condensed into ice, filling of a protection material is completed; the turbine blade is put into an environment with the temperature below 0 DEG C and is perforated by pulse type laser radiation; after perforation, a plug body is taken out, and the turbine blade is immersed into boiled water; after the ice is melted, residual carbon powder in the blade runner is flushed out by running water through the hole in the top end of the turbine blade; after the carbon powder is completely flushed away, the turbine blade is dried by hot air. The technology is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of gas turbine blades, in particular to an ice-carbon powder mixture used as a rear wall protection method for laser processing of turbine blades. Background technique [0002] Used as a gas turbine blade, it works in an environment of high-speed rotation and high-temperature gas action, and is subjected to huge centrifugal force, oxidation, and corrosion. Those rear wall positions damaged by laser are easy to be corroded or form stress centers and reduce the service life of the blade, so laser protection for the rear wall is required. [0003] At present, laser protection technology is mainly aimed at anti-laser reinforcement of human eyes and optical sensors. The protection principles include laser protection technology based on the principle of linear optics, laser protection technology based on the principle of nonlinear optics, and laser protection technology based on the principle of phase change. The...

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): B23K26/382
CPCB23K26/38B23K2101/001
Inventor 王恪典袁新董霞王文君吕静凡正杰段文强
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap