Unlock instant, AI-driven research and patent intelligence for your innovation.

Renovation technique of combustion turbine first order jet nozzle

A gas turbine and nozzle technology, which is used in the manufacture of tools, mechanical measuring devices, and mechanical devices, etc., can solve the problems of the phase change of the substrate, the low bonding strength of the repaired part, and the large heat-affected zone, and achieves small thermal deformation and standardization. Strong, great value effects

Inactive Publication Date: 2008-10-08
SHENYANG DALU LASER TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Argon arc welding is a metallurgical combination, but its heat-affected zone is large, and it is easy to cause a phase change in the base material; vacuum brazing is a non-metallurgical combination, and the bonding strength of the repaired part is low

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
  • Renovation technique of combustion turbine first order jet nozzle
  • Renovation technique of combustion turbine first order jet nozzle
  • Renovation technique of combustion turbine first order jet nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The repair process of the primary nozzle of the general damage situation of embodiment 1

[0025] The process steps are as follows:

[0026] 1. Production of nozzle profile line model:

[0027] 1) The blade selects a nozzle with a relatively good profile as the reference plane for the production of the profile model;

[0028] 2) Choose an appropriate spacing and make 3 to 5 molded line samples;

[0029] 3) After the molded line model is made, check the molded lines of all nozzles;

[0030] 2. Carry out heat treatment on the nozzle to eliminate the stress of the parts; the heat treatment process is: keep warm at 1200-1500°C for 1-3 hours, and slowly cool;

[0031] 3. Laser cladding:

[0032] 1) Clean up the defects of the nozzle;

[0033] 2) Automatically control the laser cladding repair on the cleaned parts. The diameter of the laser cladding molten pool is 1-3mm, the depth of the molten pool is about 0.1-0.2mm, the heating time is 0.001-0.1s, and the cladding mat...

Embodiment 2

[0042] Embodiment 2 The repair process of the severely damaged contact primary nozzle

[0043] The process steps are as follows:

[0044] 1. Production of nozzle profile line model:

[0045] 1) The blade selects a nozzle with a relatively good profile as the reference plane for the production of the profile model;

[0046] 2) Choose an appropriate spacing and make 3 to 5 molded line samples;

[0047] 3) After the molded line model is made, check the molded lines of all nozzles;

[0048] 2. Perform heat treatment on the nozzle to eliminate stress; the heat treatment process is: keep warm at 1200-1500°C for 1-3 hours, and then cool slowly;

[0049] 3. Cut off the exhaust side of the seriously damaged nozzle;

[0050] 4. Make a new nozzle exhaust edge;

[0051] 5. Laser cladding

[0052] 1) Clean up the defects of the nozzle;

[0053] 2) Automatically control the laser cladding repair on the cleaned parts. The diameter of the laser cladding molten pool is 1-3mm, the depth ...

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
diameteraaaaaaaaaa
depthaaaaaaaaaa
Login to View More

Abstract

The invention provides a gas turbine first grade nozzle repair art which is characterized as follows : 1) nozzle type model production; 2) nozzle solution heat treatment, the heat treatment process is: heat preservation for 1 ~ 3 hours under 1200 to 1500 DEG C; 3) the laser fusion cover repair of defect part: fusion pool diameter is 1~3mm, depth is 0.1~0.2mm, the heating time is 0.001 ~0.1 seconds, the fusion cover materials are metal powder fit with basal body;4) modification; 5) nozzle throat size detection; 6) nozzle aging treatment, aging treatment process is: heat preservation 4 to 6 hour at 950 ~ 1000 degree C, fast cooling to 500 ~ 560 degree C. The advantages of the repair technology are: achieving the high intensity combination repair of first grade and the repair art has good adaptability, small processing error, small thermal deformation, strong standard capability, and the repaired nozzle performance is clearly superior, it is of tremendous value.

Description

technical field [0001] The invention relates to the maintenance and detection technology of the first-stage nozzle of the gas turbine, and in particular provides a repair process of the first-stage nozzle of the gas turbine. Background technique [0002] A gas turbine is a power machine that uses a certain liquid or gas as a working medium to provide power to other mechanical equipment. The first stage nozzle is one of the key components of the gas turbine. Its primary nozzle has high precision grade, complex manufacturing process, high production cost and long cycle. The process conditions of this type of primary nozzle are harsh, and the working temperature is above 1000°C. [0003] The primary nozzle is generally a precision casting of superalloy. The blade profiles are specially designed and have strict quality requirements. Therefore, the manufacturing cost of the first-level nozzle is very high. Due to the influence of foreign intellectual property rights, it canno...

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 Patents(China)
IPC IPC(8): B23P6/00B23K26/34G01B5/00G01B3/26
Inventor 刘豫陈江李启发
Owner SHENYANG DALU LASER TECH