Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Fuel Nozzle of Gas Turbine Combustor and Manufacturing Method Thereof, and Gas Turbine Combustor

a technology of gas turbine combustor and fuel nozzle, which is applied in the direction of manufacturing tools, machines/engines, lighting and heating apparatus, etc., can solve the problem of high probability of backfire in which flames enter an unburned side, and achieve the effect of improving mechanical strength and reliability of the fuel nozzl

Inactive Publication Date: 2018-01-04
MITSUBISHI POWER LTD
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention improves the strength and reliability of a fuel nozzle used in a multi-hole coaxial jet burner, which helps to keep a gas turbine combustor operating healthily over a long period of time. The technical effect of this invention is better performance and durability of the fuel nozzle, ensuring a reliable and efficient operation of the gas turbine.

Problems solved by technology

The premixed combustion, however, involves a higher likelihood of a backfire in which flames enter an unburned side of a fuel supply portion as a flame temperature increases.

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
  • Fuel Nozzle of Gas Turbine Combustor and Manufacturing Method Thereof, and Gas Turbine Combustor
  • Fuel Nozzle of Gas Turbine Combustor and Manufacturing Method Thereof, and Gas Turbine Combustor
  • Fuel Nozzle of Gas Turbine Combustor and Manufacturing Method Thereof, and Gas Turbine Combustor

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0035]A gas turbine combustor in the present embodiment will be described below with reference to FIGS. 9A and 9B. FIG. 9A is a cross-sectional view showing a structure of main parts of the gas turbine combustor. FIG. 9B is a view on arrow A-A′ in FIG. 9A. The following describes an embodiment in which the present invention is applied to a multi-hole coaxial jet burner. It is noted that FIGS. 9A and 9B are schematic drawings and the number of air holes 55 differs between FIG. 9A and FIG. 9B.

[0036]A burner 53 includes a fuel distributor (end flange) 57, a plurality of fuel nozzles 56, a combustor liner 3, and an air hole plate 54. Specifically, the end flange 57 distributes fuel 41. The fuel nozzles 56 inject the fuel 41. The air hole plate 54 has a disc shape and is disposed at an upstream side end portion of the fuel liner 3. The air hole plate 54 has a plurality of air holes 55 that face a downstream side of the fuel nozzles 56 and through which combustion air 12 passes. A mixture...

second embodiment

[0050]A fuel nozzle structure in a second embodiment will be described with reference to FIG. 4. FIG. 4 shows a cross-sectional structure of a fuel nozzle 56 and an end flange 57 according to the present embodiment. In the present embodiment, a protrusion 103 is formed in advance at portions of a nozzle root portion and the end flange to which electron beam welding is applied and the protrusion 103 is flattened after the hot isostatic pressing (HIP) process.

[0051]Cutting to remove a fusion zone produced by the electron beam welding (electron beam welding (EBW)) flattens the end flange 57. This allows an undeposited portion that can occur at a bonding end portion to be readily identified and improves inspection performance when the burner including the fuel nozzle 56 is operated for a long time.

[0052]Additionally, the foregoing improves mechanical strength with respect to vibration stress occurring from combustion vibration and to thermal distortion acting on the end flange 57, to th...

third embodiment

[0053]A fuel nozzle structure and a manufacturing method thereof in a third embodiment will be described with reference to FIGS. 8A to 8F. FIG. 8A outlines a manufacturing process in the present embodiment. FIGS. 8B to 8F show more detailed manufacturing steps. The left drawing of FIG. 8A shows a condition corresponding to FIG. 8D and the right drawing of FIG. 8A shows a condition corresponding to FIG. 8F. Each of FIGS. 8A to 8F shows only an area near a root of a fuel nozzle 56 and omits showing a shape of a leading end portion thereof.

[0054]In the manufacturing method for the fuel nozzle in the present embodiment, the fuel nozzle 56 is inserted into a hole provided in an end flange 57 and a bottom plate 107 is disposed on the side of a back surface of the end flange 57. Electron beam welding is performed on each of a bond portion between the fuel nozzle 56 and the end flange 57 and a bond portion between the end flange 57 and the bottom plate 107 to thereby form an electron beam w...

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
depthaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

To provide a fuel nozzle for a gas turbine combustor, offering favorable durability and strength reliability. In a fuel nozzle for a gas turbine combustor, jetting fuel into a combustion chamber of the gas turbine combustor, the fuel nozzle is metallurgically and integrally bonded with a base plate that supports the fuel nozzle, and an interface between the fuel nozzle and the base plate includes a surface in which bonding is performed by a fusion joint or a brazing joint and an inside part in which bonding is performed by pressure bonding.

Description

CLAIM OF PRIORITY[0001]The present application claims priority from Japanese Patent application serial no. 2016-131411, filed on Jul. 1, 2016, the content of which is hereby incorporated by reference into this application.TECHNICAL FIELD[0002]The present invention relates to combustors and gas turbines including the combustors and, more particularly, to a fuel nozzle structure of a gas turbine combustor including a plurality of multi-hole coaxial jet burners.BACKGROUND ART[0003]A need exists from an environmental preservation viewpoint for further reduction in the amount of NOx in exhaust gas of gas turbines. One known combustion method of the gas turbine combustor is premixed combustion that premixes fuel with air before combustion. This can achieve a considerable reduction in the amount of NOx emissions compared with diffusion combustion in which fuel is directly injected into a combustion chamber for combustion. The premixed combustion, however, involves a higher likelihood of a ...

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
Patent Type & Authority Applications(United States)
IPC IPC(8): F23R3/28F23R3/60F01D9/04F02C3/30F01D9/02
CPCF23R3/286F23R3/283F23R3/60F02C3/30F05D2300/171F01D9/02F05D2300/10F05D2300/17F01D9/04F23D2213/00F23R2900/00018B23K15/0046B23P19/02F02C7/22F05D2240/35F23R2900/00017B23K15/00B23K20/00F23R3/28
Inventor WADAYAMA, YOSHIHIDEKUMAGAI, SATOSHIMIURA, KEISUKEKARISHUKU, MITSUHIRODODO, SATOSHI
Owner MITSUBISHI POWER LTD
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
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