Hollow blade as well as manufacturing method and application thereof

A hollow blade and blade technology, applied in the direction of blade support elements, engine elements, machines/engines, etc., can solve the problems of shrinkage holes, difficult control of inner cavity and hole surface roughness, insufficient quality control, etc., and achieve aerodynamic performance improvement. , to ensure efficient processing and reliable work, to ensure the effect of shape accuracy and consistency

Inactive Publication Date: 2018-06-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3D printing technology is used to manufacture hollow blades with complex shapes. Although the integral printing of the air film hole of the turbine blade and the blade blank can be realized, the air film hole manufactured by 3D printing will have different degrees of "shrinkage cavity". And hole surface roughness is not easy to control
[0007] To sum up, the geometric shape of air film holes and the quality of inner and outer surfaces of blades have a great influence on the cooling efficiency and reliability of aeroengine blades, but the current technology still has obvious deficiencies in its quality control

Method used

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  • Hollow blade as well as manufacturing method and application thereof
  • Hollow blade as well as manufacturing method and application thereof
  • Hollow blade as well as manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0079] According to one embodiment of the present application, the manufacturing method of the hollow blade includes at least the following steps:

[0080] (1) The overall profile structure of the manufactured blade;

[0081] (2) Processing inner cavity;

[0082] (3) Processing cooling structure;

[0083] (4) A transition structure is obtained to obtain the hollow vane.

[0084] figure 1 It is a schematic flow chart of a hollow blade with a novel film cooling structure and a manufacturing method thereof for the present application, and the method includes the following steps:

[0085] Step 101: split molding: decompose the blade into several (n≥2) split parts that are easy to process, and manufacture the overall outline structure of different split parts of the blade separately;

[0086] In this step, at least one method of forging, casting, wire cutting, and 3D printing can be used to manufacture the overall contour structure of the different split parts of the blade.

...

Embodiment 1

[0106] A novel air film cooling hollow blade and its manufacturing method, such as figure 1 As shown, including: metal, high temperature resin, polyimide, ceramics and other materials.

[0107] Step 1. Decompose the blade into several (n≥2) split parts that are easy to process, and use forging, casting, wire cutting, 3D printing and other manufacturing processes to separately manufacture the overall outline structure of different split parts of the blade;

[0108] Step 2. According to the geometric design requirements of the hollow blade, the hollow inner cavity contour is processed on different blade split structures. The processing methods that can be used include precision machining, electrolytic processing, laser processing, ultrasonic processing, EDM, etc.;

[0109] Step 3. Air film holes are processed on the split parts of different blades. Laser drilling, electro-hydraulic beam drilling, electrolytic drilling, electric spark drilling and other processes can be used; Co...

Embodiment 2

[0116] Aeroengine hollow blade 1 looks like image 3 As shown, along the dividing line 13, it is decomposed into the sub-body 11 and the sub-body 12, tenon parts of the blade 1, and the manufacturing process of the blade 1 is as follows:

[0117] (1) Using mechanical forging, casting, wire cutting, 3D printing and other manufacturing processes to separately manufacture different split parts of the blade, including split 11 and split 12, such as image 3 shown;

[0118] (2) According to the geometric design requirements of the hollow blade, hollow contours are processed on different blade split structures. The processing methods that can be used include precision machining, electrolytic machining, laser machining and EDM. Such as Figure 4 As shown, taking the split body 11 as an example, the hollow cavity 20 is processed inside the blade split body 11 as the gas flow channel of the hollow blade 1. This method can be used to process the gas flow channel with complex shape, hi...

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Abstract

The invention discloses a hollow blade as well as a manufacturing method and application thereof. The hollow blade comprises a cooling structure, an inner cavity and a transition structure, wherein the transition structure is located at the junction of the cooling structure and the wall surface of the inner cavity. Compared with the prior art, the blade avoids a sharp structure of the air film cooling structure of the inner cavity, the machining method can guarantee shape precision and consistency of the blade and the air film cooling structure, and occurrence of the back damage problems is thoroughly avoided from a process route layer, so that the quality and reliability of the blade are guaranteed.

Description

technical field [0001] The application relates to a hollow blade, its manufacturing method and application, and belongs to the technical field of blades. Background technique [0002] Blades have been widely used in many power mechanisms such as aero-engines, gas turbines, and aerospace engines. With the continuous improvement of engine performance, the operating temperature of turbine blades is getting higher and higher. In order to maintain the mechanical performance and reliability of blades under high temperature conditions, hollow blades are used in the industry, and air film cooling structures are used on the blades. How to process high-quality, high-reliability film cooling holes on hollow blades is an urgent problem to be solved, especially with the use of small hollow blades and double-wall structure blades, the distance between the blade surface layer and the next layer Smaller and smaller, such as as small as 1mm. With such a spacing, the current film cooling h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/18
CPCF01D5/186
Inventor 张文武王玉峰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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