Gas generator for long time operation

Abstract

This invention relates to the field of gas generator technology, and more particularly to a gas generator for long-term operation, comprising a cylindrical body with a discharge port at the bottom and a sealed feed mechanism for receiving hydrogen peroxide at the upper end. Inside the cylindrical body is a catalytic reaction mechanism for the rapid decomposition of hydrogen peroxide. Below the catalytic reaction mechanism is an outlet lattice structure. The sealed feed mechanism includes a feed port at the upper end of the cylindrical body, a sealing flange on the outside of the feed port, and a connecting assembly between the sealing flange and the cylindrical body. This invention, by setting up a sealed feed mechanism and utilizing the cooperation between the sealing flange and a sealing spring (which has a certain stiffness and is always under compression during operation), ensures greater stability of the components inside the cylindrical body, preventing temperature and pressure fluctuations due to movement during the vigorous catalytic decomposition reaction.

Description

Technical Field

[0001] This invention relates to the field of gas generator technology, and more particularly to a gas generator for long-term operation. Background Technology

[0002] Gas generators are a common component in the field of turbine engines, used to generate high-temperature, high-pressure oxygen-rich gas. This high-temperature, high-pressure gas can drive the turbine to do work and also act as a combustion aid to improve the combustion efficiency of the engine's combustion chamber. Hydrogen peroxide catalytically decomposes to produce oxygen and water while releasing a large amount of heat, making it a green and pollution-free working medium for gas generators.

[0003] In existing technologies, most gas generators using hydrogen peroxide as a medium employ stacked multi-layer pure silver mesh as a catalytic bed. When the engine is running, hydrogen peroxide decomposes rapidly under the action of the catalyst to produce high-temperature and high-pressure oxygen-rich gas. However, the pure silver mesh catalytic bed material is relatively soft, with a theoretical melting point of about 961°C. Under high-temperature conditions, it is prone to sintering and deformation after long-term operation, resulting in unstable catalytic decomposition performance and a short service life. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a gas generator for long-term operation, which solves the technical problem that the pure silver mesh catalytic bed material is relatively soft and is prone to sintering and deformation under high temperature conditions for extended periods of operation. It has the advantage of ensuring catalytic effect while avoiding sintering and deformation of the pure silver mesh.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a gas generator for long-term operation, comprising a cylindrical body, a discharge port at the bottom of the cylindrical body, a sealed feeding mechanism for receiving hydrogen peroxide at the upper end of the cylindrical body, a catalytic reaction mechanism for the rapid decomposition of hydrogen peroxide inside the cylindrical body, and an outlet lattice structure below the catalytic reaction mechanism. After hydrogen peroxide enters the interior of the cylindrical body through the sealed feeding mechanism, the catalytic reaction mechanism contacts the hydrogen peroxide, thereby decomposing the hydrogen peroxide into high-temperature oxygen-rich gas. The sealed feeding mechanism includes a feed port at the upper end of the cylindrical body, a sealing flange on the outside of the feed port, a connecting assembly between the sealing flange and the cylindrical body, a feed connector on the sealing flange, and a sealing spring inside the cylindrical body. The sealing spring is made of high-temperature alloy material, manufactured by 3D printing, and has a certain rigidity. During operation, it is in a compressed state, thereby ensuring that all components inside the cylindrical body are in close contact and do not move.

[0006] Preferably, the catalytic reaction mechanism includes a silver-plated nickel mesh structure and a pure silver mesh structure. Each set of pure silver mesh structures is sandwiched between two sets of silver-plated nickel mesh structures. A distribution disc is provided inside the cylindrical body. Several circular through holes are opened on the distribution disc. One set of pure silver mesh structures and one set of silver-plated nickel mesh structures alternate with each other to form a "sandwich" structure. This structure 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-flow baffle is provided between the pure silver mesh structure and the silver-plated nickel mesh structure to prevent hydrogen peroxide from flowing directly 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 structure hardness and high temperature resistance of the silver-plated pure nickel mesh are superior to those of the pure silver mesh, and it will not exhibit sintering deformation defects at high temperatures.

[0009] Preferably, the pure silver mesh structure and the silver-plated nickel mesh structure are stacked in an alternating manner, with an angle of 15 to 30 degrees between the stacks, thereby avoiding the formation of through holes in the flow direction.

[0010] Preferably, the silver plating thickness of the silver-plated nickel mesh structure is greater than 20 μm, 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 decompose hydrogen peroxide completely through surface high temperature.

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

[0013] By employing 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. By setting up a sealed feeding mechanism, the present invention utilizes the 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 inside the cylindrical body are more stable and will not cause fluctuations in temperature and pressure due to movement during the violent catalytic decomposition reaction.

[0015] 2. This invention, by setting up a catalytic reaction mechanism, utilizes a "sandwich" structure formed by alternating silver-plated nickel mesh 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, effectively increasing the service life of the gas generator.

[0016] 3. By setting up a catalytic reaction mechanism, the present invention utilizes the cooperation between the distribution plate and the circular through hole to distribute the flow of hydrogen peroxide, thereby ensuring that hydrogen peroxide can be in uniform contact with the catalyst and fully exert its catalytic performance.

[0017] 4. This invention, by setting an outlet lattice structure, utilizes a nickel-based high-temperature alloy lattice structure with a porosity between 30% and 40% to ensure that the lattice structure has sufficient surface area to promote further and complete decomposition of hydrogen peroxide, and can reasonably control the pressure drop loss within an acceptable range.

[0018] 5. This invention generates high-temperature, high-pressure oxygen-rich gas by catalytically decomposing hydrogen peroxide. The decomposed components consist of oxygen and water vapor, which are pollution-free. The high-temperature, high-pressure oxygen-rich gas can be used to drive the engine turbine and act 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 easily adjusted. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a perspective view of the overall structure of the present invention;

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

[0022] Figure 3 This is a schematic diagram of the catalytic reaction mechanism in this invention;

[0023] Figure 4 This is a schematic diagram of the distribution circular plate in this invention;

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

[0025] In the diagram: 1. Columnar cylinder; 2. Discharge port; 3. Sealed feeding mechanism; 301. Feed inlet; 302. Sealing flange; 303. Connecting assembly; 304. Feed connector; 305. Sealing spring; 4. Catalytic reaction mechanism; 401. Silver-plated nickel mesh structure; 402. Pure silver mesh structure; 403. Anti-flow baffle; 404. Distribution disc; 405. Circular through hole; 5. Outlet lattice structure. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] In existing technologies, most gas generators using hydrogen peroxide as a medium employ stacked multi-layered pure silver mesh as a catalytic bed. During engine operation, hydrogen peroxide rapidly decomposes under the action of the catalyst to produce high-temperature, high-pressure oxygen-rich gas. However, the pure silver mesh catalytic bed material is relatively soft and prone to sintering and deformation under prolonged high-temperature operation, resulting in unstable catalytic decomposition performance and a short service life. To address this technical deficiency in existing technologies, such as... 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 pure silver mesh and effectively increase the service life of the gas generator. The gas generator includes a cylindrical body 1, with a discharge port 2 at the bottom of the cylindrical body 1, and a sealed feeding mechanism 3 for receiving hydrogen peroxide at the upper end of the cylindrical body 1. The interior of the cylindrical body 1 is equipped with a catalytic reaction mechanism 4 for the rapid decomposition of hydrogen peroxide, and an outlet lattice structure 5 is provided below the catalytic reaction mechanism 4. After hydrogen peroxide enters the interior of the cylindrical body 1 through the sealed feeding mechanism 3, the catalytic reaction mechanism 4 will come into contact with the hydrogen peroxide, thereby decomposing the hydrogen peroxide into high-temperature oxygen-rich gas.

[0029] To effectively improve the structural rigidity and high-temperature resistance of the gas generator, this embodiment includes a catalytic reaction mechanism 4. Specifically, the catalytic reaction mechanism 4 comprises a silver-plated nickel mesh structure 401 and a pure silver mesh structure 402. The silver plating thickness of the silver-plated nickel mesh structure 401 is greater than 20 μm, thereby ensuring the catalytic performance of the silver-plated nickel mesh structure 401. An anti-flow baffle 403 is provided between the pure silver mesh structure 402 and the silver-plated nickel mesh structure 401 to prevent hydrogen peroxide from flowing directly out from 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 structure of the silver-plated pure nickel mesh is rigid. The silver mesh structure has superior heat resistance and high temperature resistance compared to pure silver mesh. It does not exhibit sintering deformation defects at high temperatures. Each set of pure silver mesh structure 402 is sandwiched between two sets of silver-plated nickel mesh structures 401. The pure silver mesh structure 402 and the silver-plated nickel mesh structure 401 are stacked and staggered at an angle of 15 to 30 degrees to avoid forming through holes in the flow direction. The interior of the cylindrical body 1 is provided with a distribution circular plate 404, which has several circular through holes 405. The pure silver mesh structure 402 and the silver-plated nickel mesh structure 401 alternate with each other to form a "sandwich" structure. This structure 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] Example 2

[0031] To ensure that all components inside the cylindrical body 1 are in close contact and do not move around, based on Embodiment 1, as follows: Figure 1 , Figure 2 As shown, this embodiment is provided with a sealing feeding mechanism 3. Specifically, the sealing feeding mechanism 3 includes a feeding port 301 opened at the upper end of the cylindrical body 1. A sealing flange 302 is provided on the outside of the feeding port 301. A connecting assembly 303 is provided between the sealing flange 302 and the cylindrical body 1. A feeding connector 304 is provided on the sealing flange 302. A sealing spring 305 is provided inside the cylindrical body 1. The sealing spring 305 is made of high-temperature alloy material and is manufactured by 3D printing process. It has a certain rigidity and is in a compressed state during operation, thereby ensuring that the components inside the cylindrical body 1 are in close contact and will not move.

[0032] Example 3

[0033] To ensure that hydrogen peroxide can be completely decomposed further, based on the above embodiments, such as... Figure 2 and Figure 5 As shown, this embodiment sets 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%. Through surface high temperature, hydrogen peroxide can be further decomposed completely.

[0034] As can be seen from the above, when the gas generator is working, hydrogen peroxide will enter the interior of the cylindrical body 1 through the feed joint 304 on the sealing flange 302. Then, the hydrogen peroxide will fall evenly through the multiple circular through holes 405 on the distribution plate 404.

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

[0036] Furthermore, the pure silver mesh structure 402 and the silver-plated nickel mesh structure 401 are stacked at an angle of 15 to 30 degrees to each other, which can effectively prevent the formation of through holes in the flow direction. In addition, each set of pure silver mesh structure 402 and each set of silver-plated nickel mesh structure 401 is provided with an anti-flow baffle 403, which can effectively prevent hydrogen peroxide from flowing out directly from the gap between the catalytic reaction mechanism 4 and the columnar cylinder 1.

[0037] This embodiment, by setting up a sealed feeding mechanism 3, utilizes the cooperation between the sealing flange 302 and the sealing spring 305. The sealing spring 305 has a certain rigidity and is always in a compressed state during operation, which can ensure that the various components inside the cylindrical body 1 are more stable and will not cause temperature and pressure fluctuations due to movement during the violent catalytic decomposition reaction. Moreover, this embodiment, by setting up a catalytic reaction mechanism 4, uses a "sandwich" structure formed by alternating silver-plated nickel mesh structure 401 and pure silver mesh structure 402 to replace the traditional pure silver mesh stacked structure. This can ensure the catalytic effect while avoiding sintering deformation of the pure silver mesh, which can effectively increase the service life of the gas generator. Furthermore, this embodiment, by setting up a catalytic reaction mechanism 4, utilizes the distribution circular plate 404 and the circular tube... The interaction between the pores 405 allows for the distribution of hydrogen peroxide flow, ensuring uniform contact between the hydrogen peroxide and the catalyst and maximizing its catalytic performance. Furthermore, this embodiment utilizes an outlet lattice structure 5, employing a nickel-based high-temperature alloy lattice structure with a porosity between 30% and 40%, to provide sufficient surface area for further and complete decomposition of hydrogen peroxide, while keeping pressure drop within an acceptable range. Additionally, this gas generator produces high-temperature, high-pressure oxygen-rich gas through the catalytic decomposition of hydrogen peroxide. The decomposed gas consists of oxygen and water vapor, producing no pollution. This high-temperature, high-pressure oxygen-rich gas can be used to drive the engine turbine and act as a combustion aid to improve combustion efficiency in the combustion chamber. Turbine power can be easily adjusted by regulating the hydrogen peroxide flow rate.

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

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

Claims

1. A gas generator for long-term operation, comprising a cylindrical body (1), wherein the cylindrical body (1) has a discharge port (2) at its lower end, characterized in that: The upper end of the cylindrical body (1) is provided with a sealed feeding mechanism (3) for receiving hydrogen peroxide, and the interior of the cylindrical body (1) is provided with a catalytic reaction mechanism (4) for rapidly decomposing hydrogen peroxide. An outlet lattice structure (5) is provided below the catalytic reaction mechanism (4). The sealing feeding mechanism (3) includes a feeding port (301) opened at the upper end of the cylindrical body (1), a sealing flange (302) is provided on the outside of the feeding port (301), a connecting assembly (303) is provided between the sealing flange (302) and the cylindrical body (1), a feeding connector (304) is provided on the sealing flange (302), and a sealing spring (305) is provided inside the cylindrical body (1). The catalytic reaction mechanism (4) includes a silver-plated nickel mesh structure (401) and a pure silver mesh structure (402). Each set of pure silver mesh structures (402) is sandwiched between two sets of silver-plated nickel mesh structures (401). The pure silver mesh structures (402) and silver-plated nickel mesh structures (401) are stacked and interleaved.

2. A gas generator for long duration operation according to claim 1, characterized in that: The cylindrical body (1) is provided with a distribution plate (404) inside, and the distribution plate (404) has a number of circular through holes (405).

3. A gas generator for long duration operation as claimed in claim 1, wherein: An anti-flow baffle (403) is provided between the pure silver mesh structure (402) and the silver-plated nickel mesh structure (401).

4. A gas generator for long duration operation as claimed in claim 1, wherein: 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 duration operation as claimed in claim 1, wherein: The silver plating thickness of the silver-plated nickel mesh structure (401) is greater than 20 μm.

6. A gas generator for long duration operation as claimed in claim 1, wherein: The outlet lattice structure (5) is a 3D printed nickel-based high-temperature alloy lattice structure.

7. A gas generator for long-term operation according to claim 6, characterized in that: The porosity of the outlet lattice structure (5) is between 30% and 40%.

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