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Water-cooled type steam turbine vane

A steam turbine blade and water-cooling technology, which is applied to the supporting components of the blade, mechanical equipment, engine components, etc., can solve the problems affecting the normal operation of the equipment, the service life of the blade is reduced, and the surface of the blade is corroded, so as to achieve a uniform and stable blade structure and improve The overall impact performance and the effect of ensuring corrosion resistance

Inactive Publication Date: 2017-02-22
南京赛达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The number of blades is not only large, but also complex in shape, with strict processing requirements, strong friction with the air during use, and very high surface temperature. Operating at high temperature for a long time will greatly reduce the service life of the blades, and even the surface of the blades will be corroded, Cracks and other serious safety hazards will affect the normal operation of the equipment

Method used

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  • Water-cooled type steam turbine vane
  • Water-cooled type steam turbine vane
  • Water-cooled type steam turbine vane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a water-cooled steam turbine blade, including a blade 1 and a blade root 2, the blade root 2 is in the shape of a parallelogram, and blade root grooves 3 are respectively opened on the upper and lower sides of the blade root 2, and blade root slots 3 are respectively opened on the blade root 2. A first cavity 4 and a second cavity 5 communicating with the inside of the blade root 2 are opened respectively, a groove 6 is opened on one side of the blade root 2 along its length direction, and a groove 6 is arranged at the bottom of the groove 6 A plug 7, the groove 6 communicates with the second cavity 5, and cooling water is provided inside the first cavity 4 and the second cavity 5;

[0043] The surface of the blade 1 is provided with a high-temperature-resistant metal coating, and the composition of the high-temperature-resistant metal coating is: C: 0.03%, Si: 0.17%, Mn: 0.25%, Cr: 5.36%, Ni: 8.12 %, Cu: 1.32%, Mo: 0.16%, Co: 0.12%, V: 0.36%, Z...

Embodiment 2

[0057] This embodiment provides a water-cooled steam turbine blade, the structure of which is the same as that in Embodiment 1, wherein the surface of the blade 1 is provided with a high-temperature-resistant metal coating, and the composition of the high-temperature-resistant metal coating is: C: 0.05%, Si: 0.19%, Mn: 0.28%, Cr: 5.39%, Ni: 8.14%, Cu: 1.35%, Mo: 0.18%, Co: 0.15%, V: 0.45%, Zn: 0.8%, Al: 0.30%, Ti: 0.18%, B: 0.10%, Mg: 0.48%, S: 0.03%, P: 0.05%, additives: 0.36%, and the balance is Fe;

[0058] The chemical composition mass percentage of the additives is: Ce: 14%, Pr: 5%, Nd: 8%, Pm: 5%, Gd: 7%, Lu: 9%, Dy: 6%, Eu: 5% , Ho: 15%, Er: 8%, Ni: 0.5%, Zn: 0.8%, Cu: 0.9%, and the balance is La;

[0059] The preparation method of the auxiliary agent: first put Ce, Pr, Nd, Pm, Gd, Lu, Dy, Eu elements into the reaction furnace, increase the temperature to 990 ° C, keep the temperature for 5 hours, then air cool to room temperature, and then put Pulverize in a ball mil...

Embodiment 3

[0070] This embodiment provides a water-cooled steam turbine blade, the structure of which is the same as that in Embodiment 1, wherein the surface of the blade 1 is provided with a high-temperature-resistant metal coating, and the composition of the high-temperature-resistant metal coating is: C: 0.04%, Si: 0.18%, Mn: 0.27%, Cr: 5.38%, Ni: 8.13%, Cu: 1.33%, Mo: 0.17%, Co: 0.14%, V: 0.40%, Zn: 0.7%, Al: 0.29%, Ti: 0.17%, B: 0.09%, Mg: 0.46%, S: 0.02%, P: 0.04%, additives: 0.34%, and the balance is Fe;

[0071] The chemical composition mass percentage of the additives is: Ce: 13%, Pr: 4%, Nd: 6%, Pm: 4%, Gd: 6%, Lu: 5%, Dy: 5%, Eu: 4% , Ho: 13%, Er: 7%, Ni: 0.4%, Zn: 0.7%, Cu: 0.8%, and the balance is La;

[0072]The preparation method of the auxiliary agent: first put Ce, Pr, Nd, Pm, Gd, Lu, Dy, Eu elements into the reaction furnace, increase the temperature to 986 ° C, keep the temperature for 4 hours, then air cool to room temperature, and then put Pulverize in a ball mill...

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Abstract

The invention relates to a water-cooled type steam turbine vane comprising a vane body and a vane root. The vane root is in a parallelogram shape. Vane root grooves are formed in the upper side and the lower side of the vane root correspondingly. A first cavity and a second cavity which communicate with each other are formed in the vane body and the vane root correspondingly. A groove is formed in the side, in the length direction, of the vane root. A plug is arranged at the bottom of the groove. The groove communicates with the second cavity. Cooling water is contained in the first cavity and the second cavity. A high-temperature-resistant metal coating is arranged on the surface of the vane body. By means of the water-cooled type steam turbine vane, the impact toughness of the vane can be substantially improved, the service life of the vane is prolonged, and the cooling performance of the vane is improved.

Description

technical field [0001] The invention relates to a steam turbine blade, in particular to a water-cooled steam turbine blade. Background technique [0002] A steam turbine is a rotary power machine that converts the energy of steam into mechanical work, also known as a steam turbine. It is mainly used as a prime mover for power generation, and it can also directly drive various pumps, fans, compressors and ship propellers, etc. It can also use the steam exhaust or intermediate extraction of steam turbines to meet the heating needs of production and life. Steam turbines are mainly used in electric power industry, shipbuilding industry, cement, chemical industry, petroleum, metallurgy, heavy machinery and other fields. [0003] The number of blades is not only large, but also complex in shape, with strict processing requirements, strong friction with the air during use, and very high surface temperature. Operating at high temperature for a long time will greatly reduce the serv...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/52C22C38/46C22C38/06C22C38/54C23C4/06C21D1/26C21D1/25F01D5/18
CPCC22C38/02C21D1/25C21D1/26C22C38/002C22C38/005C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/52C22C38/54C23C4/06F01D5/185
Inventor 刘达王河平宗国翼
Owner 南京赛达科技有限公司
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