阅读说明：本技术 一种液态金属冷却叶片系统及其防腐蚀方法 (Liquid metal cooling blade system and anti-corrosion method thereof ) 是由 罗翔 张哲� 邬泽宇 于 2021-09-02 设计创作，主要内容包括：本发明涉及航空发动机叶片冷却系统液态金属腐蚀防护技术领域,尤其涉及一种液态金属冷却叶片系统,其包括分离器、管道A、管道B、电磁泵、管道C、膨胀节、管道D、换热器、管道F、管道G、收集器和叶片；换热器上设有管道E；叶片内设有冷却通道；冷却通道、管道A、分离器、管道B、电磁泵、管道C、膨胀节、管道D、管道E、管道F、收集器和管道G依次连通,形成循环通路；循环通路内存有液体金属；管道A、管道B、管道C、管道D、管道F和管道G均选用石英材质或石墨材质或碳化铝材质制成；循环通路的内壁均设有防护层A。本发明还提出了液态金属冷却叶片系统的防腐蚀方法。本发明能有效的解决在高温下液态金属腐蚀冷却系统的问题。(The invention relates to the technical field of liquid metal corrosion protection of an aircraft engine blade cooling system, in particular to a liquid metal cooling blade system, which comprises a separator, a pipeline A, a pipeline B, an electromagnetic pump, a pipeline C, an expansion joint, a pipeline D, a heat exchanger, a pipeline F, a pipeline G, a collector and blades, wherein the separator is arranged on the pipeline A; a pipeline E is arranged on the heat exchanger; cooling channels are arranged in the blades; the cooling channel, the pipeline A, the separator, the pipeline B, the electromagnetic pump, the pipeline C, the expansion joint, the pipeline D, the pipeline E, the pipeline F, the collector and the pipeline G are sequentially communicated to form a circulation passage; liquid metal is stored in the circulation passage; the pipeline A, the pipeline B, the pipeline C, the pipeline D, the pipeline F and the pipeline G are made of quartz materials, graphite materials or aluminum carbide materials; the inner walls of the circulation passages are provided with protective layers A. The invention also provides an anti-corrosion method of the liquid metal cooling blade system. The invention can effectively solve the problem that the liquid metal corrodes the cooling system at high temperature.)

1. A liquid metal cooling vane system is characterized by comprising a separator (1), a pipeline A (2), a pipeline B (3), an electromagnetic pump (4), a pipeline C (5), an expansion joint (6), a pipeline D (7), a heat exchanger (8), a pipeline F (10), a pipeline G (11), a collector (12) and vanes (13);

a pipeline E (9) is arranged on the heat exchanger (8); the pipeline E (9) is made of 1Cr18Ni9 stainless steel material, niobium-based alloy material or T91 steel material;

a cooling channel (14) is arranged in the blade (13); the liquid outlet port of the cooling channel (14) is connected with a liquid inlet port of the separator (1) through a pipeline A (2); the liquid outlet port of the separator (1) is connected with the liquid inlet port of the electromagnetic pump (4) through a pipeline B (3);

a pipe orifice at one end of the pipeline C (5) is connected with a liquid outlet port of the electromagnetic pump (4), and a pipe orifice at the other end of the pipeline C (5) is connected with a pipe orifice at one end of the expansion joint (6); the pipe orifice at the other end of the expansion joint (6) is connected with the liquid inlet pipe orifice of the pipeline E (9) through a pipeline D (7); a liquid outlet pipe port of the pipeline E (9) is connected with a liquid inlet port of the collector (12) through a pipeline F (10); one liquid outlet port of the collector (12) is connected with a liquid inlet port of the cooling channel (14) through a pipeline G (11);

the pipeline A (2), the pipeline B (3), the pipeline C (5), the pipeline D (7), the pipeline F (10) and the pipeline G (11) are made of quartz materials, graphite materials or aluminum carbide materials; the inner wall of the cooling channel (14), the inner wall through which the fluid flows in the electromagnetic pump (4), the inner wall of the expansion joint (6), the inner wall in the collector (12) which is contacted with the fluid and the inner wall in the separator (1) which is contacted with the fluid are all provided with protective layers A,

the cooling channel (14), the pipeline A (2), the separator (1), the pipeline B (3), the electromagnetic pump (4), the pipeline C (5), the expansion joint (6), the pipeline D (7), the pipeline E (9), the pipeline F (10), the collector (12) and the pipeline G (11) are communicated in sequence to form a circulation passage; liquid metal is present in the circulation path.

2. Liquid metal cooling vane system according to claim 1, characterized in that the inner surface of the duct E (9) is provided with Al₂O₃Protective layer B or SiO₂And a protective layer B.

3. A liquid metal cooling fin system according to claim 1, wherein the duct E (9) is distributed in a serpentine shape.

4. The liquid metal cooling blade system of claim 1, wherein the liquid metal includes, but is not limited to, gallium metal or gallium-based alloy metal.

5. The liquid metal cooling blade system of claim 1, wherein the construction method of the protective layer A specifically comprises the following steps:

s51, carrying out sand blasting or polishing treatment on the inner wall to be sprayed;

s52, filling the dried AlN ceramic powder into a spray gun (15) on the inner wall of the superfine rod;

s53, spraying the smooth inner wall processed in the S51 by a superfine rod inner wall spray gun (15);

s54, carrying out coating dew point inspection on the sprayed inner wall;

if a missing point is detected, continue to S55;

if no leak point is detected, the inner wall to be processed is qualified, and a protective layer A is prepared on the inner wall to be processed;

and S55, continuing to spray the inner wall where the leakage point is located, and continuing to execute S54.

6. The liquid metal cooling blade system of claim 5, wherein the method of inspecting the dew point of the coating in S44 is coating surface observation inspection and spark erosion test.

7. A method of corrosion protection for a liquid metal cooled bucket system, including a liquid metal cooled bucket system according to any one of claims 1 to 6, including the steps of:

s71, carrying out spraying construction on the blades (13), the electromagnetic pump (4), the expansion joint (6), the collector (12) and the separator (1) in the liquid metal cooling blade system according to the requirements of the design process;

processing a pipeline A (2), a pipeline B (3), a pipeline C (5), a pipeline D (7), a pipeline E (9), a pipeline F (10) and a pipeline G (11) in the liquid metal cooling blade system according to design requirements;

s72, assembling the separator (1), the pipeline A (2), the pipeline B (3), the electromagnetic pump (4), the pipeline C (5), the expansion joint (6), the pipeline D (7), the heat exchanger (8), the pipeline E (9), the pipeline F (10), the pipeline G (11), the collector (12) and the blades (13) to obtain a liquid metal cooling blade system, and injecting liquid metal into the liquid metal cooling blade system.

Technical Field

The invention relates to the technical field of liquid metal corrosion protection of an aircraft engine blade cooling system, in particular to a liquid metal cooling blade system and an anti-corrosion method thereof.

Background

The liquid metal has excellent properties, such as large difference between a melting point and a boiling point, close physical and chemical properties to solid, fixed volume, excellent fluidity, good heat conductivity and the like of the metal, so that the liquid metal is widely applied to a plurality of fields, such as high-power high-heat-flow-density chips, space heat control technology, novel clean energy technology, laser-related heat control and the like, and is particularly successfully applied to high-performance computers and high-power LED illumination in the form of a coolant, and further the liquid metal is assumed to be applied to turbine blades of an aircraft gas engine as a flowing working medium.

In the practical production and application process, the liquid metal gallium and gallium-based alloy react with metal materials such as pure metals (iron, chromium and nickel), stainless steel, aluminum alloy, T2 copper and the like to different degrees, so that the strength of the material is reduced, even the material is crushed and falls off, the normal use of the material is influenced to a certain extent, and therefore a scientific and effective method needs to be provided for material selection contacting with the liquid metal and surface protection of a metal substrate.

Disclosure of Invention

The invention aims to provide a liquid metal cooling blade system capable of effectively solving the problem that a cooling system is corroded by liquid metal at a high temperature and an anti-corrosion method thereof, aiming at the problems in the background art.

The technical scheme of the invention is as follows: a liquid metal cooling blade system comprises a separator, a pipeline A, a pipeline B, an electromagnetic pump, a pipeline C, an expansion joint, a pipeline D, a heat exchanger, a pipeline F, a pipeline G, a collector and blades;

a pipeline E is arranged on the heat exchanger; the pipeline E is made of 1Cr18Ni9 stainless steel, niobium-based alloy or T91 steel;

cooling channels are arranged in the blades; the liquid outlet port of the cooling channel is connected with a liquid inlet port of the separator through a pipeline A; the liquid outlet port of the separator is connected with the liquid inlet port of the electromagnetic pump through a pipeline B;

a pipe orifice at one end of the pipeline C is connected with a liquid outlet port of the electromagnetic pump, and a pipe orifice at the other end of the pipeline C is connected with a pipe orifice at one end of the expansion joint; the pipe orifice at the other end of the expansion joint is connected with the liquid inlet pipe orifice of the pipeline E through a pipeline D; a liquid outlet pipe port of the pipeline E is connected with a liquid inlet port of the collector through a pipeline F; one liquid outlet port of the collector is connected with a liquid inlet port of the cooling channel through a pipeline G;

the pipeline A, the pipeline B, the pipeline C, the pipeline D, the pipeline F and the pipeline G are made of quartz materials, graphite materials or aluminum carbide materials; the inner wall of the cooling channel, the inner wall through which the fluid flows in the electromagnetic pump, the inner wall of the expansion joint, the inner wall in the collector and the inner wall in the separator, which are in contact with the fluid, are provided with protective layers A,

the cooling channel, the pipeline A, the separator, the pipeline B, the electromagnetic pump, the pipeline C, the pipeline D, the pipeline E, the pipeline F, the collector and the pipeline G are sequentially communicated to form a circulating passage; liquid metal is present in the circulation path.

Preferably, the inner surface of the pipe E is provided with Al₂O₃Protective layer B or SiO₂And a protective layer B.

Preferably, the conduit E is distributed in a serpentine shape.

Preferably, the liquid metal includes, but is not limited to, gallium metal or gallium-based alloy metal.

Preferably, the construction method of the protective layer a specifically includes the following steps:

s51, carrying out sand blasting or polishing treatment on the inner wall to be sprayed;

s52, filling the dried AlN ceramic powder into a spray gun on the inner wall of the superfine rod;

s53, spraying the smooth inner wall processed in the S51 by an ultrafine rod inner wall spray gun;

s54, carrying out coating dew point inspection on the sprayed inner wall;

if a missing point is detected, continue to S55;

if no leak point is detected, the inner wall to be processed is qualified, and a protective layer A is prepared on the inner wall to be processed;

and S55, continuing to spray the inner wall where the leakage point is located, and continuing to execute S54.

Preferably, the method for inspecting the dew point of the coating in S44 is coating surface observation inspection and electric spark test.

The anti-corrosion method for the liquid metal cooling blade system comprises the liquid metal cooling blade system and specifically comprises the following steps:

s71, carrying out spraying construction on the blades, the electromagnetic pump, the expansion joint, the collector and the separator in the liquid metal cooling blade system according to the requirements of the design process;

processing a pipeline A, a pipeline B, a pipeline C, a pipeline D, a pipeline E, a pipeline F and a pipeline G in the liquid metal cooling blade system according to design requirements;

s72, assembling the separator, the pipeline A, the pipeline B, the electromagnetic pump, the pipeline C, the expansion joint, the pipeline D, the heat exchanger, the pipeline E, the pipeline F, the pipeline G, the collector and the blades to obtain a liquid metal cooling blade system, and injecting liquid metal into the liquid metal cooling blade system.

Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:

according to the liquid metal cooling blade system and the corrosion prevention method thereof, the heat conductivity and the corrosion resistance of each pipeline material in the liquid metal cooling blade system are considered in the middle, and the inner wall of each part in the liquid metal cooling blade system, which is in contact with liquid metal, is subjected to corrosion prevention spraying treatment to generate the corrosion-resistant anticorrosive coating A, so that the service life of the anticorrosive coating A is greatly prolonged, and the reliability and the service life of the liquid metal cooling blade system are further prolonged;

the liquid metal cooling blade system and the corrosion prevention method thereof can eradicate the mass transfer of the liquid metal on the solid contact surface, and prevent solid phase metal from being dissolved in the liquid metal and liquid metal atoms from diffusing into crystal lattices of the solid phase metal, so that a feasible corrosion prevention method is researched, a proper corrosion-resistant material is screened out, and the reliable and durable operation of the liquid metal cooling blade system is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment.

FIG. 2 is a schematic structural view of the second embodiment of spraying the inner wall of the cooling channel on the blade.

Reference numerals: 1. a separator; 2. a pipeline A; 3. a pipeline B; 4. an electromagnetic pump; 5. a pipe C; 6. an expansion joint; 7. a pipeline D; 8. a heat exchanger; 9. a pipe E; 10. a pipeline F; 11. a pipe G; 12. a collector; 13. a blade; 14. a cooling channel; 15. superfine pole inner wall spray gun.

Detailed Description

Example one

As shown in fig. 1-2, the liquid metal cooling vane system provided by the present invention comprises a separator 1, a pipeline a2, a pipeline B3, an electromagnetic pump 4, a pipeline C5, an expansion joint 6, a pipeline D7, a heat exchanger 8, a pipeline F10, a pipeline G11, a collector 12 and vanes 13;

a pipeline E9 is arranged on the heat exchanger 8; the pipeline E9 is made of 1Cr18Ni9 stainless steel, niobium-based alloy or T91 steel; the inner surface of the pipe E9 is provided with Al₂O₃Protective layer B or SiO₂A protective layer B for prolonging the service life of the pipeline E9;

the 1Cr18Ni9 stainless steel material or the niobium-based alloy material or the T91 steel material is a high-temperature-resistant and high-heat-conductivity corrosion-resistant metal material, so that the high-temperature-resistant and high-heat-conductivity corrosion-resistant metal material can be processed into a pipeline E9;

further, the duct E9 is distributed in a serpentine shape to increase the time for the liquid metal to flow through the duct E9;

cooling channels 14 are arranged in the blades 13; the liquid outlet port of the cooling channel 14 is connected with a pipe orifice at one end of the pipeline A2; the other end of the pipeline A2 is connected with a liquid inlet port of the separator 1 through a pipeline;

the liquid outlet port of the separator 1 is connected with a pipe orifice at one end of the pipeline B3; the pipe orifice at the other end of the pipeline B3 is connected with the liquid inlet port of the electromagnetic pump 4;

the liquid outlet port of the electromagnetic pump 4 is connected with a pipe orifice at one end of the pipeline C5; the other end pipe orifice of the pipeline C5 is connected with one end pipe orifice of the expansion joint 6; the other end pipe orifice of the expansion joint 6 is connected with one end pipe orifice of the pipeline D7; the other end pipe orifice of the pipeline D7 is connected with the liquid inlet pipe orifice of the pipeline E9;

the liquid outlet pipe orifice of the pipeline E9 is connected with the pipe orifice at one end of the pipeline F10; the pipe orifice at the other end of the pipeline F10 is connected with the liquid inlet port of the collector 12; one liquid outlet port of the collector 12 is connected with a pipe orifice at one end of the pipe G11; the pipe orifice at the other end of the pipe G11 is connected with the liquid inlet port of the cooling channel 14;

the pipeline A2, the pipeline B3, the pipeline C5, the pipeline D7, the pipeline F10 and the pipeline G11 are all made of quartz materials, graphite materials or aluminum carbide materials;

quartz, graphite or aluminum carbide are all high temperature resistant and low thermal conductivity corrosion-resistant non-metallic materials, so that the high temperature resistant and low thermal conductivity corrosion-resistant non-metallic materials can be processed into a pipeline A2, a pipeline B3, a pipeline C5, a pipeline D7, a pipeline F10 and a pipeline G11;

the inner walls of the cooling channel 14, the inner wall through which the fluid flows in the electromagnetic pump 4, the inner wall of the expansion joint 6, the inner wall of the collector 12 which is in contact with the fluid and the inner wall of the separator 1 which is in contact with the fluid are provided with protective layers a,

the cooling channel 14, the pipeline A2, the separator 1, the pipeline B3, the electromagnetic pump 4, the pipeline C5, the expansion joint 6, the pipeline D7, the pipeline E9, the pipeline F10, the collector 12 and the pipeline G11 are communicated in sequence to form a circulation passage; liquid metal is stored in the circulation passage; the liquid metal includes, but is not limited to, gallium metal or gallium-based alloy metal, such as liquid metal also includes sodium metal, potassium metal, sodium potassium alloy metal, lead bismuth alloy metal, and the like.

In one embodiment of the present invention, the blades 13 are heat-dissipated by a liquid metal having excellent heat-conductive properties; the high-temperature liquid metal in the cooling channel 14 in the blade 13 enters the pipeline E9 along the pipeline A2, the separator 1, the pipeline B3 and the pipeline C5 in sequence by the electromagnetic pump 4, and the heat exchanger 8 dissipates the heat of the high-temperature liquid metal flowing through the pipeline E9; the liquid metal after heat dissipation flows into the cooling channel 14 in the blade 13 along the pipeline F10, the collector 12 and the pipeline G11 in sequence; protective layers A are arranged on the inner wall of the cooling channel 14, the inner wall through which the liquid metal in the electromagnetic pump 4 flows, the inner wall of the expansion joint 6, the inner wall in the collector 12 and the inner wall in the separator 1, which are in contact with the liquid metal, so that the liquid metal is prevented from corroding the components; the pipeline A2, the pipeline B3, the pipeline C5, the pipeline D7, the pipeline E9, the pipeline F10 and the pipeline G11 are all made of corrosion-resistant materials, so that the service life of the cooling blade system is greatly prolonged, and the running reliability of the liquid metal cooling blade system is ensured.

Example two

Compared with the first embodiment, the liquid metal cooling blade system provided by the invention further comprises a construction method of the protective layer A, and the construction method specifically comprises the following steps:

s51, carrying out sand blasting or polishing treatment on the inner wall to be sprayed;

when the inner walls of the cooling passages 14 on the blades 13, the inner walls through which the fluid flows in the electromagnetic pump 4, the inner walls of the expansion joints 6, the inner walls in the collector 12 and the inner walls in the separator 1, which are in contact with the fluid, are treated, the inner walls are polished or sand-blasted according to different structure choices of the components so as to be smooth;

s52, filling the dried AlN ceramic powder into the superfine rod inner wall spray gun 15;

the AlN ceramic powder has the advantages of high heat conductivity coefficient, low expansion coefficient and no corrosion by gallium and alloy thereof;

s53, spraying the smooth inner wall processed in the S51 by the superfine rod inner wall spray gun 15;

mixing the dried AlN ceramic powder particles with high-pressure gas to form aerosol, conveying the aerosol into a vacuum chamber on the superfine rod inner wall spray gun 15, accelerating to hundreds of meters per second, and then spraying the aerosol from a nozzle on the superfine rod inner wall spray gun 15 to be attached to the treated smooth inner wall so as to form a protective layer A on the smooth inner wall;

s54, carrying out coating dew point inspection on the sprayed inner wall; the method for inspecting the dew point of the coating comprises the steps of observing and inspecting the surface of the coating and testing an electric spark;

if a missing point is detected, continue to S55;

if no leak point is detected, the inner wall to be processed is qualified, and a protective layer A is prepared on the inner wall to be processed;

and S55, continuing to spray the inner wall where the leakage point is located, and continuing to execute S54.

In one embodiment of the invention, the protective layer A is formed by spraying the inner wall of the cooling channel 14, the inner wall through which the liquid metal flows in the electromagnetic pump 4, the inner wall of the expansion joint 6, the inner wall of the collector 12 which is in contact with the liquid metal and the inner wall of the separator 1 which is in contact with the liquid metal, so that the corrosion of the liquid metal to the inner wall of the components is avoided, and the operation reliability and the service life of the liquid metal cooling blade system are greatly improved.

EXAMPLE III

A corrosion prevention method for a liquid metal cooling blade system comprises the liquid metal cooling blade system in the first embodiment, and specifically comprises the following steps:

s71, carrying out spraying construction on the blades 13, the electromagnetic pump 4, the expansion joint 6, the collector 12 and the separator 1 in the liquid metal cooling blade system according to the requirements of the design process;

processing a pipeline A2, a pipeline B3, a pipeline C5, a pipeline D7, a pipeline E9, a pipeline F10 and a pipeline G11 in the liquid metal cooling blade system according to design requirements;

s72, assembling the separator 1, the pipeline A2, the pipeline B3, the electromagnetic pump 4, the pipeline C5, the expansion joint 6, the pipeline D7, the heat exchanger 8, the pipeline E9, the pipeline F10, the pipeline G11, the collector 12 and the blades 13 to obtain a liquid metal cooling blade system, and injecting liquid metal into the liquid metal cooling blade system.

In one embodiment of the invention, the heat conductivity and corrosion resistance of the material of each connecting pipeline in the liquid metal cooling blade system are comprehensively considered, the material of each pipeline is selected, and the blades 13, the electromagnetic pump 4, the expansion joint 6, the collector 12 and the interior of the separator 1 in the liquid metal cooling blade system are subjected to anticorrosive coating spraying treatment, so that the operation reliability and the service life of the liquid metal cooling blade system are greatly improved.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.