Fuel gas generator for long-time working

Abstract

The invention relates to the technical field of fuel gas generators, in particular to a fuel gas generator for long-time working, which comprises a columnar barrel, a discharge port is formed in the lower end of the columnar barrel, and a sealed feeding mechanism for receiving hydrogen peroxide is arranged at the upper end of the columnar barrel. A catalytic reaction mechanism for catalyzing rapid decomposition of hydrogen peroxide is arranged in the columnar barrel, an outlet lattice structure is arranged below the catalytic reaction mechanism, the sealed feeding mechanism comprises a feeding round opening formed in the upper end of the columnar barrel, a sealing flange is arranged on the outer side of the feeding round opening, and a connecting assembly is arranged between the sealing flange and the columnar barrel. The sealed feeding mechanism is arranged, a sealing flange and a sealing spring are matched with each other, and the sealing spring has certain rigidity and is always in a compressed state during working, so that each part in the cylindrical barrel is more stable, and temperature and pressure fluctuation caused by movement in a violent catalytic decomposition reaction is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of gas generators, and in particular to a gas generator for long-term operation. Background Art

[0002] The gas generator is one of the commonly used components in the field of turbine engines. It is used to generate high-temperature and high-pressure oxygen-rich gas. On the one hand, the high-temperature and high-pressure gas can drive the turbine to do work, and on the other hand, it can serve as a combustion aid to improve the combustion efficiency of the engine combustion chamber. While hydrogen peroxide catalytically decomposes to produce oxygen and water, it releases a large amount of heat. It is a green and pollution-free working medium for gas generators.

[0003] In the prior art, most of the gas generators using hydrogen peroxide as the medium use stacked multi-layer pure silver mesh as the catalytic bed. When the engine is working, hydrogen peroxide will quickly decompose under the action of the catalyst to produce high-temperature and high-pressure oxygen-rich combustion gas. However, the pure silver mesh catalytic bed is relatively soft and has a theoretical melting point of about 961°C. It is prone to sintering and deformation when working for a long time in a high-temperature environment. The catalytic decomposition performance is unstable and the service life is short. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a gas generator for long-term operation, which solves the technical problem that the pure silver mesh catalyst bed in the prior art is relatively soft and is prone to sintering and deformation when working for a long time in a high-temperature environment. It has the advantage of being able to ensure the catalytic effect while avoiding sintering deformation of the pure silver mesh.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a gas generator for long-term operation, comprising a cylindrical cylinder, a discharge port is provided at the lower side of the cylindrical cylinder, a sealed feeding mechanism for receiving hydrogen peroxide is provided at the upper end of the cylindrical cylinder, a catalytic reaction mechanism for catalyzing the rapid decomposition of hydrogen peroxide is provided inside the cylindrical cylinder, an outlet lattice structure is provided below the catalytic reaction mechanism, after hydrogen peroxide enters the interior of the cylindrical cylinder through the sealed feeding mechanism, the catalytic reaction mechanism will contact with hydrogen peroxide, so that the hydrogen peroxide is decomposed into high-temperature oxygen-rich fuel gas, the sealed feeding mechanism comprises a feeding circular opening provided at the upper end of the cylindrical cylinder, a sealing flange is provided on the outer side of the feeding circular opening, a connecting assembly is provided between the sealing flange and the cylindrical cylinder, a feeding joint is provided on the sealing flange, a sealing spring is provided inside the cylindrical cylinder, the sealing spring is made of high-temperature alloy, is manufactured by 3D printing technology, has a certain rigidity, and is in a compressed state during operation, thereby ensuring that the components in the cylindrical cylinder are in close contact and will not move.

[0006] Preferably, the catalytic reaction mechanism includes a silver-plated nickel mesh structure and a pure silver mesh structure, each group of pure silver mesh structures is sandwiched between two groups of silver-plated nickel mesh structures, a distribution circular plate is arranged inside the columnar cylinder, a plurality of circular through holes are opened on the distribution circular plate, and a group of pure silver mesh structures and a group of silver-plated nickel mesh structures are alternated with each other to form a "sandwich" structure, which is different from the traditional pure silver mesh stacking structure and can effectively improve the structural hardness and high temperature resistance of the gas generator.

[0007] Preferably, an anti-bypass spacer is provided between the pure silver mesh structure and the silver-plated nickel mesh structure, so as to prevent hydrogen peroxide from directly flowing out from the gap between the catalytic reaction mechanism and the columnar cylinder.

[0008] Preferably, the pure silver mesh structure is composed of several layers of pure silver mesh, and the silver-plated nickel mesh structure is composed of several layers of silver-plated pure nickel mesh. The structural hardness and high temperature resistance of the silver-plated pure nickel mesh are better than those of the pure silver mesh, and the defect of sintering deformation will not occur at high temperatures.

[0009] Preferably, the pure silver mesh structure and the silver-plated nickel mesh structure are staggered with each other when stacked, and the staggered angle is fifteen to thirty when stacked, so as to avoid forming through holes in the flow direction.

[0010] Preferably, the silver plating thickness of the silver-plated nickel mesh structure is higher than 20 um, thereby ensuring the catalytic performance of the silver-plated nickel mesh structure.

[0011] Preferably, the outlet lattice structure is a 3D printed nickel-based high-temperature alloy lattice structure, which can further completely decompose the hydrogen peroxide through the high surface temperature.

[0012] Preferably, the porosity of the outlet lattice structure is between 30% and 40%, so that the lattice structure has sufficient surface area to promote the full decomposition of hydrogen peroxide, and the pressure drop loss is within an acceptable range.

[0013] By means of the above technical solution, the present invention provides a gas generator for long-term operation, which has at least the following beneficial effects:

[0014] 1. The present invention sets a sealed feeding mechanism and utilizes the mutual cooperation between the sealing flange and the sealing spring. The sealing spring has a certain rigidity and is always in a compressed state during operation, which can ensure that the various components in the columnar cylinder are more stable and will not cause fluctuations in temperature and pressure due to movement during violent catalytic decomposition reactions.

[0015] 2. The present invention provides a catalytic reaction mechanism and utilizes a "sandwich" structure formed by alternating silver-plated nickel mesh structures and pure silver mesh structures to replace the traditional pure silver mesh stacking structure. This can ensure the catalytic effect while avoiding sintering deformation of the pure silver mesh, thereby effectively increasing the practical life of the gas generator.

[0016] 3. The present invention provides a catalytic reaction mechanism and utilizes the cooperation between the distribution circular plate and the circular through hole to distribute the flow of hydrogen peroxide, thereby ensuring that the hydrogen peroxide can be in uniform contact with the catalyst and give full play to the catalytic performance.

[0017] 4. The present invention sets an outlet lattice structure and utilizes a nickel-based high-temperature alloy lattice structure with a porosity of 30% to 40% to provide the lattice structure with sufficient surface area to promote further decomposition of hydrogen peroxide and to reasonably control the pressure drop loss within an acceptable range.

[0018] 5. The present invention generates high-temperature and high-pressure oxygen-rich fuel gas by catalytically decomposing hydrogen peroxide. The decomposed components are composed of oxygen and water vapor, and are pollution-free. The high-temperature and high-pressure oxygen-rich fuel gas can be used to drive the engine turbine to do work and serve as a combustion aid to improve the combustion efficiency of the combustion chamber. By adjusting the hydrogen peroxide flow rate, the turbine power can be conveniently adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the catalytic reaction mechanism in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the distribution circular plate in the present invention;

[0024] Figure 5 It is a schematic diagram of the outlet lattice structure in the present invention.

[0025] In the figure: 1. cylindrical cylinder; 2. discharge port; 3. sealed feed mechanism; 301. feed circular port; 302. sealing flange; 303. connecting assembly; 304. feed joint; 305. sealing spring; 4. catalytic reaction mechanism; 401. silver-plated nickel mesh structure; 402. pure silver mesh structure; 403. anti-bypass spacer; 404. distribution circular plate; 405. circular through hole; 5. outlet lattice structure. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1

[0028] In the prior art, most gas generators using hydrogen peroxide as a medium use stacked multi-layer pure silver mesh as a catalyst bed. When the engine is working, hydrogen peroxide will quickly decompose under the action of the catalyst to produce high-temperature and high-pressure oxygen-rich gas. However, the pure silver mesh catalyst bed is relatively soft and is prone to sintering and deformation when working for a long time in a high-temperature environment. The catalytic decomposition performance is unstable and the service life is short. In order to solve this technical defect in the prior art, Figure 2 , Figure 3 as well as Figure 4 As shown, this embodiment proposes a gas generator for long-term operation, which can effectively avoid sintering deformation of the pure silver mesh and effectively increase the practical life of the gas generator. The gas generator includes a columnar barrel 1, a discharge port 2 is opened at the lower side of the columnar barrel 1, a sealed feeding mechanism 3 for receiving hydrogen peroxide is provided at the upper end of the columnar barrel 1, a catalytic reaction mechanism 4 for catalyzing the rapid decomposition of hydrogen peroxide is provided inside the columnar barrel 1, and an outlet lattice structure 5 is provided below the catalytic reaction mechanism 4. After hydrogen peroxide enters the interior of the columnar barrel 1 through the sealed feeding mechanism 3, the catalytic reaction mechanism 4 will contact with the hydrogen peroxide, thereby decomposing the hydrogen peroxide into high-temperature oxygen-rich fuel gas.

[0029] In order to effectively improve the structural hardness and high temperature resistance of the gas generator, the present embodiment is provided with a catalytic reaction mechanism 4. Specifically, the catalytic reaction mechanism 4 includes a silver-plated nickel mesh structure 401 and a pure silver mesh structure 402. The silver coating thickness of the silver-plated nickel mesh structure 401 is higher than 20um, thereby ensuring the catalytic performance of the silver-plated nickel mesh structure 401. An anti-bypass spacer 403 is provided between the pure silver mesh structure 402 and the silver-plated nickel mesh structure 401, thereby preventing hydrogen peroxide from directly flowing out of the gap between the catalytic reaction mechanism 4 and the columnar cylinder 1. The pure silver mesh structure 402 is composed of several layers of pure silver mesh, and the silver-plated nickel mesh structure 401 is composed of several layers of silver-plated pure nickel mesh. The structural hardness of the silver-plated pure nickel mesh is The strength and high temperature resistance are better than those of pure silver mesh, and there will be no defects of sintering deformation at high temperatures. Each group of pure silver mesh structures 402 is sandwiched between two groups of silver-plated nickel mesh structures 401. The pure silver mesh structures 402 and the silver-plated nickel mesh structures 401 are staggered when stacked, and the staggered angles are fifteen to thirty when stacked, so as to avoid the formation of through holes in the flow direction. A distribution circular plate 404 is arranged inside the columnar cylinder 1, and a plurality of circular through holes 405 are opened on the distribution circular plate 404. A group of pure silver mesh structures 402 and a group of silver-plated nickel mesh structures 401 are alternated with each other to form a "sandwich" structure, which is different from the traditional pure silver mesh stacking structure and can effectively improve the structural hardness and high temperature resistance of the gas generator.

[0030] Embodiment 2

[0031] In order to ensure that the components in the cylindrical body 1 are in close contact and will not move, based on the first embodiment, Figure 1 , Figure 2 As shown, the present embodiment is provided with a sealed feeding mechanism 3. Specifically, the sealed feeding mechanism 3 includes a feeding circular opening 301 opened at the upper end of the cylindrical barrel 1, a sealing flange 302 is provided on the outer side of the feeding circular opening 301, a connecting assembly 303 is provided between the sealing flange 302 and the cylindrical barrel 1, a feeding joint 304 is provided on the sealing flange 302, and a sealing spring 305 is provided inside the cylindrical barrel 1. The sealing spring 305 is made of a high-temperature alloy and is manufactured by a 3D printing process. It has a certain rigidity and is in a compressed state when working, thereby ensuring that the components in the cylindrical barrel 1 are in close contact and will not move.

[0032] Embodiment 3

[0033] In order to ensure that hydrogen peroxide can be further decomposed completely, based on the above embodiment, Figure 2 and Figure 5 As shown, the present embodiment is provided with an outlet lattice structure 5. Specifically, the outlet lattice structure 5 is a 3D printed nickel-based high-temperature alloy lattice structure with a porosity between 30% and 40%. The high surface temperature can further decompose the hydrogen peroxide completely.

[0034] According to the above content, when the gas generator is working, hydrogen peroxide will enter the interior of the columnar barrel 1 through the feed connector 304 on the sealing flange 302, and then the hydrogen peroxide will evenly fall down through the multiple circular through holes 405 on the distribution circular plate 404.

[0035] Subsequently, the hydrogen peroxide sequentially passes through a plurality of sets of alternating silver-plated nickel mesh structures 401 and pure silver mesh structures 402, thereby fully contacting with the catalyst, decomposing into oxygen and water, and releasing a large amount of heat, thereby generating high-temperature and high-pressure oxygen-rich combustion gas.

[0036] Furthermore, the pure silver mesh structure 402 and the silver-plated nickel mesh structure 401 are staggered at an angle of 15 to 30 degrees when stacked, which can effectively prevent the formation of through holes in the flow direction. Moreover, an anti-bypass spacer 403 is arranged between each group of pure silver mesh structures 402 and each group of silver-plated nickel mesh structures 401, which can effectively prevent hydrogen peroxide from directly flowing out of the gap between the catalytic reaction mechanism 4 and the columnar cylinder 1.

[0037] In this embodiment, a sealed feeding mechanism 3 is provided, and the cooperation between the sealing flange 302 and the sealing spring 305 is utilized. The sealing spring 305 has a certain rigidity and is always in a compressed state during operation, which can ensure that the various components in the columnar barrel 1 are more stable, and will not cause temperature and pressure fluctuations due to movement during the violent catalytic decomposition reaction; moreover, in this embodiment, a catalytic reaction mechanism 4 is provided, and a "sandwich" structure formed by alternating silver-plated nickel mesh structures 401 and pure silver mesh structures 402 is used to replace the traditional pure silver mesh stacking structure, which can ensure the catalytic effect while avoiding sintering and deformation of the pure silver mesh, and can effectively increase the practical life of the gas generator; moreover, in this embodiment, a catalytic reaction mechanism 4 is provided, and a distribution circular plate 404 and a circular through hole 404 are used to form a "sandwich" structure, which is formed by alternating silver-plated nickel mesh structures 401 and pure silver mesh structures 402. The mutual cooperation between the holes 405 can distribute the flow of hydrogen peroxide, thereby ensuring that hydrogen peroxide can be in uniform contact with the catalyst and give full play to the catalytic performance; moreover, this embodiment sets the outlet lattice structure 5 and utilizes the nickel-based high-temperature alloy lattice structure with a porosity between 30% and 40%, so that the lattice structure has sufficient surface area to promote further decomposition of hydrogen peroxide, and can reasonably control the pressure drop loss within an acceptable range; in addition, the gas generator generates high-temperature and high-pressure oxygen-rich gas by catalytic decomposition of hydrogen peroxide. The decomposed components are composed of oxygen and water vapor, and are pollution-free. The high-temperature and high-pressure oxygen-rich gas can be used to drive the engine turbine to do work and as a combustion aid to improve the combustion efficiency of the combustion chamber. By adjusting the hydrogen peroxide flow, the turbine power can be conveniently adjusted.

[0038] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas generator for long-term operation, comprising a cylindrical body (1), a discharge port (2) being provided at the bottom of the cylindrical body (1), characterized in that: The upper end of the columnar barrel (1) is provided with a sealed feeding mechanism (3) for receiving hydrogen peroxide, the interior of the columnar barrel (1) is provided with a catalytic reaction mechanism (4) for catalyzing the rapid decomposition of hydrogen peroxide, and an outlet lattice structure (5) is provided below the catalytic reaction mechanism (4); The sealed feeding mechanism (3) comprises a feeding circular opening (301) opened at the upper end of the cylindrical barrel (1), a sealing flange (302) is arranged on the outer side of the feeding circular opening (301), a connecting component (303) is arranged between the sealing flange (302) and the cylindrical barrel (1), a feeding joint (304) is arranged on the sealing flange (302), and a sealing spring (305) is arranged inside the cylindrical barrel (1).

2. A gas generator for long-term operation according to claim 1, characterized in that: The catalytic reaction mechanism (4) comprises a silver-plated nickel mesh structure (401) and a pure silver mesh structure (402), each group of pure silver mesh structures (402) is sandwiched between two groups of silver-plated nickel mesh structures (401), and a distribution circular plate (404) is arranged inside the columnar cylinder (1), and a plurality of circular through holes (405) are opened on the distribution circular plate (404).

3. A gas generator for long-term operation according to claim 2, characterized in that: An anti-bypass spacer (403) is provided between the pure silver mesh structure (402) and the silver-plated nickel mesh structure (401).

4. A gas generator for long-term operation according to claim 2, characterized in that: The pure silver mesh structure (402) is composed of several layers of pure silver mesh, and the silver-plated nickel mesh structure (401) is composed of several layers of silver-plated pure nickel mesh.

5. A gas generator for long-term operation according to claim 2, characterized in that: The pure silver mesh structure (402) and the silver-plated nickel mesh structure (401) are interlaced when stacked.

6. A gas generator for long-term operation according to claim 2, characterized in that: The silver plating thickness of the silver-plated nickel mesh structure (401) is greater than 20 um.

7. A gas generator for long-term operation according to claim 1, characterized in that: The outlet lattice structure (5) is a 3D printed nickel-based high-temperature alloy lattice structure.

8. A gas generator for long-term operation according to claim 7, characterized in that: The porosity of the outlet lattice structure (5) is between 30% and 40%.

Images