Preparation method of guide vane of dot matrix cooling structure

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...

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 structures. Small fluctuations in the process will lead to batches of scrapping

For guide vanes with a lattice structure, it is more difficult to manufacture by casting technology, and it is almost impossible to manufacture

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