Preparation method of guide vane of dot matrix cooling structure

A technology of guide vane and cooling structure, which is applied in the direction of additive manufacturing, mechanical equipment, process efficiency improvement, etc., and can solve problems such as difficult casting, unmanufacturable, and batch scrapping

Active Publication Date: 2017-09-08
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the technical limitations of wax mold, core preparation, casting, etc., it is difficult for precision casting to cast and form when manufacturing ultra-complex structures, and it is difficult to fill and form fine

Method used

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  • Preparation method of guide vane of dot matrix cooling structure
  • Preparation method of guide vane of dot matrix cooling structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] Preparation of K640 guide vanes with lattice structure in the cavity by laser selective melting:

[0048] (1) Utilize three-dimensional drawing software (solidworks etc.) to set up the three-dimensional CAD model of the guide vane with lattice structure;

[0049] (2) According to the structural characteristics of the lattice in the guide vane with a new cooling structure, adjust the forming direction of the guide vane to ensure that all lattice units in the guide vane can be formed smoothly without adding support;

[0050] (3) According to the forming direction of the guide vane determined in step (2) and the structural characteristics of the guide vane, add forming auxiliary supports to the suspended part of the guide vane with an included angle of <45° with the forming surface;

[0051](4) Carry out layered slice processing on the guide vane in the forming direction, and evenly divide it into slices with a thickness of about 0.02-0.05 μm. The slice includes the cross-...

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Abstract

The invention belongs to the technical field of guide vane preparation, and particularly relates to a preparation method of a guide vane of a dot matrix cooling structure. A laser selective melting quick molding technology is adopted for preparing the guide vane of the dot matrix structure, the dot matrix structure is composed of dot matrix units, each dot matrix unit is composed of a rod piece, each dot matrix unit is in a shape of a tetrahedron or pyramid or kagome construction, and an inner cavity of a vane body of the guide vane is filled with the dot matrix structure. According to the preparation method, lasers serve as an energy source, powder bed selective quick molding equipment is used, appropriate guide vane molding direction and technological parameters are set, preparation of the guide device vane of the dot matrix structure is further completed through a CAD model directly, a die is not needed, the alloy material using rate is high, the radiating performance of the obtained guide device vane is excellent, the molding accuracy is good, the radiating performance of the guide vane can be greatly improved, and the cooling efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of guide vane preparation, in particular to a method for preparing guide vanes with a lattice cooling structure. Background technique [0002] The efficiency of the gas turbine engine increases with the increase of the turbine inlet temperature. The current gas temperature is far higher than the temperature limit of the blade material. Effective cooling of the turbine blades is necessary to ensure the normal operation of the gas turbine. The working environment of the high-temperature components in the gas turbine, such as the combustion chamber, the turbine, and the tail nozzle, is very harsh, which results in poor reliability and short life of the high-temperature components. According to the statistics of the authoritative department in the United States, more than 60% of the failures in gas turbines occur in high-temperature components, and there is a rising trend. The service life of some high-temperat...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F5/04B33Y10/00
CPCB22F5/04B33Y10/00B22F10/00B22F10/36B22F12/30B22F10/40B22F10/66B22F10/366B22F10/28B22F10/32Y02P10/25
Inventor 孙兵兵刘伟秦仁耀唐思熠郭绍庆
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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