Ignition device for preventing deflagration of hydrogen gas turbine at ignition

Abstract

This invention provides an ignition device to prevent deflagration during the ignition of a hydrogen gas turbine. When ignition is required, a drive assembly moves the ignition shroud from its initial position within the mounting cavity into the combustion chamber. This allows a small portion of the combustible mixture within the ignition shroud to be ignited first, followed by a slow-burning flame that propagates outwards along the opening of the ignition shroud and gradually ignites the remaining combustible mixture within the combustion chamber. After ignition, the drive assembly moves the ignition shroud back to its initial position, while a sealing assembly seals the mounting cavity to prevent gas from flowing into the combustion chamber. The ignition shroud prevents widespread deflagration that could damage the combustion chamber structure or even turbine components, significantly improving the safety and stability of hydrogen gas turbine ignition. The sealing assembly, when the ignition is complete and the drive assembly moves the ignition shroud back to its initial position, seals the mounting cavity, preventing the backflow of high-temperature, high-pressure gas from the combustion chamber and protecting all components of the ignition device.

Description

Technical Field

[0001] This invention belongs to the field of gas turbine technology, specifically relating to an ignition device to prevent deflagration during the ignition of a hydrogen gas turbine. Background Technology

[0002] Most of the heavy-duty gas turbines currently in service use natural gas as fuel, which releases a large amount of carbon dioxide during combustion, significantly increasing carbon emissions. Therefore, gas turbine suppliers and research institutions at home and abroad are trying to find a clean fuel to replace traditional hydrocarbon fuels. At present, they have mastered the technology of natural gas blending with hydrogen combustion and are working on the development of all-hydrogen gas turbines.

[0003] Hydrogen, as a clean and efficient energy source, plays a significant role in energy technology reform and energy development strategies. In recent years, it has experienced rapid development due to its advantages such as cleanliness, environmental friendliness, and sustainable utilization. The only combustion product of hydrogen is water. If pure hydrogen is used as fuel for gas turbines, carbon emissions can be significantly reduced. However, the highly diffuse, flammable, and explosive characteristics of hydrogen must be given high priority. Its danger level is far higher than that of natural gas, and its explosion limits are wide. When the hydrogen-air mixture is uneven, it is prone to deflagration upon encountering an ignition source. Especially in the combustion chamber of a gas turbine, where a large amount of combustible mixture fills the chamber, uneven mixing of hydrogen and air near the high-energy ignition electrode can lead to deflagration at the moment of ignition. Furthermore, the rapid flame propagation speed of hydrogen can instantly ignite the entire mixture in the combustion chamber, causing deflagration and potentially damaging the combustion chamber and turbine components. Therefore, traditional ignition systems are no longer suitable for hydrogen gas turbines.

[0004] To address the aforementioned issues, it is necessary to propose a reasonably designed ignition device that effectively prevents deflagration during the ignition of a hydrogen gas turbine. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and provides an ignition device to prevent deflagration during the ignition of a hydrogen gas turbine, which can prevent deflagration in the combustion chamber of the hydrogen gas turbine and significantly improve ignition safety and stability.

[0006] This invention provides an ignition device to prevent deflagration during ignition of a hydrogen gas turbine. The ignition device is located in a mounting cavity between the flame tube wall and the combustion chamber wall. The ignition device includes: An ignition shroud, the opening of which is used to communicate with the combustion chamber of the gas turbine; An ignition rod, with a cable at its first end and a second end passing through and fixed to the top wall of the ignition cover; A drive assembly, connected to the ignition rod, is used to drive the ignition rod and the ignition cover to move; A sealing assembly is disposed in the mounting cavity; wherein... When ignition is required, the drive assembly drives the ignition cover to move from the initial position of the mounting cavity into the combustion chamber, so that when ignition is required, a small portion of the combustible mixture in the ignition cover is ignited first, and then the slow-burning flame spreads out along the opening of the ignition cover and spreads to the surroundings, gradually igniting the remaining combustible mixture in the combustion chamber. After ignition, the drive assembly drives the ignition cover back to the initial position, while the sealing assembly seals the mounting cavity to prevent gas from flowing into the combustion chamber.

[0007] Optionally, the drive assembly includes an igniter cylinder and a first elastic element; The igniter cylinder passes through and is fixed to the wall of the combustion and pressure cylinder; The ignition rod is installed through the ignition cylinder; The first elastic element is disposed in the igniter cylinder and connected to the ignition rod; wherein, When ignition is required, high-pressure gas is injected into the igniter cylinder. The high-pressure gas compresses the first elastic element, driving the ignition rod and the ignition cover to move simultaneously into the combustion chamber. After ignition, the high-pressure gas in the igniter cylinder is released, and the first elastic element gradually rebounds, driving the ignition rod and the ignition cover to move simultaneously away from the combustion chamber.

[0008] Optionally, the sealing assembly includes a sealing block, a conical sealing wall, and multiple sealing block drive structures; The conical sealing wall is located above the ignition cover. The first end of the conical sealing wall is fixed to the mounting wall of the mounting cavity, and the second end of the conical sealing wall is inclined from the mounting wall toward the axis of the mounting cavity. The sealing block is movably disposed above the conical sealing wall; wherein the ignition rod is movably disposed through the central region of the sealing block; Multiple sealing block drive structures are connected to the sealing block for driving the sealing block to rise and fall; wherein, after ignition, the sealing block drive structure drives the sealing block to move toward the conical sealing wall until a sealing contact is formed between the sealing block and the conical sealing wall.

[0009] Optionally, the plurality of the sealing block drive structures are distributed at circumferential intervals along the sealing block.

[0010] Optionally, the sealing block drive structure includes a sealing device cylinder, a second elastic element, and a connecting rod; The second elastic element is disposed in the cylinder of the sealing device; The first end of the connecting rod is inserted into the cylinder of the sealing device and connected to the second elastic element, and the second end of the connecting rod is fixedly connected to the sealing block.

[0011] Optionally, after ignition is completed and the ignition cover moves to the initial position, a sealing contact is formed between the top wall of the ignition cover and the second end of the conical sealing wall.

[0012] Optionally, the top wall of the ignition cover is a flat wall, and the side walls of the ignition cover gradually bend outward from the top wall towards the opening in a trumpet shape.

[0013] Optionally, after ignition is completed and the ignition cover moves to the initial position, the curved part of the side wall of the ignition cover forms a sealed contact with the corner of the lower end of the mounting wall of the mounting cavity.

[0014] Optionally, the sealing block, the conical sealing wall, the mounting wall, and the ignition cover together form a first chamber; The sealing block, the conical sealing wall, the mounting wall, and the combustion and pressure cylinder wall together form a second chamber; wherein... Before ignition, during the process of the ignition cover being moved from the initial position to the combustion chamber, during ignition, and after the ignition cover is moved back to the initial position, the first chamber and the second chamber are not in communication. During the process of the ignition cover moving back to the initial position, the first chamber and the second chamber are connected.

[0015] Optionally, it also includes an air intake pipe that passes through the wall of the combustion and pressure cylinder and communicates with the second chamber.

[0016] The ignition device provided by this invention for preventing deflagration during ignition of a hydrogen gas turbine, by setting an ignition shroud, can isolate a portion of the premixed hydrogen and air gas from the remaining premixed gas in the combustion chamber. When the ignition rod discharges, only the combustible mixture in the ignition shroud is ignited. The combustible mixture burns rapidly, and the flame spreads from inside the ignition shroud to the ignition shroud outlet. Upon reaching the outlet, it rapidly spreads outwards, relying on the slow-burning flame to ignite the remaining mixture. The ignition device of this invention can avoid the spark generated by the ignition rod discharge acting on all the combustible mixture in the combustion chamber, but only on a small portion of the combustible mixture in the ignition shroud, thereby preventing large-scale deflagration in the combustion chamber. Even if the hydrogen and air in the ignition shroud are unevenly mixed, and the ignition rod discharge causes deflagration, it only occurs within the ignition shroud shell, not the entire combustion chamber. This prevents large-scale deflagration from causing damage to the combustion chamber structure or even turbine components, significantly improving the ignition safety and stability of the hydrogen gas turbine.

[0017] The ignition device provided by this invention for preventing deflagration during the ignition of a hydrogen gas turbine, by setting a sealing component, seals the mounting cavity when ignition is completed and the drive component drives the ignition cover to move back to the initial position, preventing the backflow of high-temperature and high-pressure gas in the combustion chamber, protecting the components of the ignition device in the mounting cavity, and improving the reliability of the ignition device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall ignition device for preventing deflagration during ignition of a hydrogen gas turbine according to the present invention. Figure 2 This is a schematic diagram of the ignition device in this invention when ignition is required; Figure 3 This is a schematic diagram illustrating the process of the ignition cover returning to its initial position after ignition by the ignition device in this invention.

[0019] Figure 4 This is a schematic diagram of the air intake tube in this invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, the present invention provides an ignition device to prevent deflagration during the ignition of a hydrogen gas turbine. The ignition device is located in the mounting cavity between the flame tube wall 15 and the combustion cylinder wall 16 in the combustion chamber.

[0022] The ignition device includes an ignition cover 9, an ignition rod 2, a drive assembly, and a sealing assembly.

[0023] The opening of the ignition shroud 9 is used to connect with the combustion chamber of the gas turbine. In other words, the opening of the ignition shroud 9 is used to connect with the flame tube of the steam turbine.

[0024] The first end of the ignition rod 2 is provided with a cable 3, and the second end of the ignition rod 2 passes through and is fixed to the top wall of the ignition cover 9. During ignition, high voltage is transmitted to the ignition rod 2 through the cable 3, and the ignition rod 2 then discharges to generate an electric spark that ignites a small portion of the combustible mixture inside the ignition cover 9.

[0025] The drive assembly is connected to the ignition rod 2 and is used to drive the ignition rod 2 and the ignition cover 9 to move. A sealing assembly is disposed in the mounting cavity; wherein... like Figure 2As shown, when ignition is required, the drive assembly drives the ignition cover 9 to move from the initial position of the mounting cavity into the combustion chamber, so that when ignition is required, a small portion of the combustible mixture in the ignition cover is ignited first, and then the slow-burning flame spreads out along the opening of the ignition cover and spreads to the surroundings, gradually igniting the remaining combustible mixture in the combustion chamber.

[0026] like Figure 4 As shown, after ignition, the drive assembly drives the ignition cover 9 back to the initial position, and at the same time the sealing assembly seals the mounting cavity to prevent gas from flowing into the combustion chamber.

[0027] The ignition device provided by this invention for preventing deflagration during ignition of a hydrogen gas turbine, by setting an ignition shroud, can isolate a portion of the premixed hydrogen and air gas from the remaining premixed gas in the combustion chamber. When the ignition rod discharges, only the combustible mixture in the ignition shroud is ignited. The combustible mixture burns rapidly, and the flame spreads from inside the ignition shroud to the ignition shroud outlet. Upon reaching the outlet, it rapidly spreads outwards, relying on the slow-burning flame to ignite the remaining mixture. The ignition device of this invention can avoid the spark generated by the ignition rod discharge acting on all the combustible mixture in the combustion chamber, but only on a small portion of the combustible mixture in the ignition shroud, thereby preventing large-scale deflagration in the combustion chamber. Even if the hydrogen and air in the ignition shroud are unevenly mixed, and the ignition rod discharge causes deflagration, it only occurs within the ignition shroud shell, not the entire combustion chamber. This prevents large-scale deflagration from causing damage to the combustion chamber structure or even turbine components, significantly improving the ignition safety and stability of the hydrogen gas turbine.

[0028] The ignition device provided by this invention for preventing deflagration during the ignition of a hydrogen gas turbine, by setting a sealing component, seals the mounting cavity when ignition is completed and the drive component drives the ignition cover to move back to the initial position, preventing the backflow of high-temperature and high-pressure gas in the combustion chamber, protecting the components of the ignition device in the mounting cavity, and improving the reliability of the ignition device.

[0029] For example, the drive assembly includes an igniter cylinder 1 and a first elastic element 4. The igniter cylinder 1 passes through and is fixed to the wall 16 of the combined combustion and pressure cylinder. Specifically, the igniter cylinder 1 is a long, straight cylindrical shape, vertically inserted into and fixed to the wall 16 of the combined combustion and pressure cylinder, and has a high-pressure gas inlet and outlet.

[0030] The ignition rod 2 is installed through the ignition cylinder 1.

[0031] The first elastic element 4 is disposed on the igniter cylinder 1 and connected to the ignition rod 2, thereby enabling the compression and rebound of the first elastic element 4 to drive the ignition rod 2 to move.

[0032] In this embodiment, the first elastic element 4 can be a spring or other elastic elements, and this embodiment does not make specific limitations.

[0033] When ignition is required, high-pressure gas is injected into the igniter cylinder 1. The high-pressure gas compresses the first elastic element 4, driving the ignition rod 2 and the ignition cover 9 to move simultaneously into the combustion chamber.

[0034] After ignition is completed, the high-pressure gas in the igniter cylinder 1 is released, and the first elastic element 4 gradually rebounds, driving the ignition rod 2 and the ignition cover 9 to move simultaneously away from the combustion chamber, so that the ignition rod 2 and the ignition cover 9 retract in the opposite direction.

[0035] In this embodiment, a combination of an igniter cylinder and a first elastic element is used for driving. High-pressure gas is used as the main force, which provides large thrust and fast response, and can quickly push the ignition cover into the combustion chamber. The spring rebound provides a reliable reset force, eliminating the need for an additional power source. The ignition cover can be moved in and out by simply controlling the charging and discharging of high-pressure gas, making the operation simple. The advancing distance of the ignition cover can be precisely controlled by controlling the charging amount, ensuring that an effective isolation is formed after the ignition cover is in place.

[0036] For example, the sealing assembly includes a sealing block 7, a conical sealing wall 8, and a plurality of sealing block drive structures.

[0037] The conical sealing wall 8 is located above the ignition cover 9. The first end of the conical sealing wall 8 is fixed to the mounting wall 10 of the mounting cavity, and the second end of the conical sealing wall 8 is inclined from the mounting wall 10 towards the axis of the mounting cavity. That is, the conical sealing wall 8 has openings at both the top and bottom, and the opening area at the top is larger than that at the bottom.

[0038] The sealing block 7 is movably disposed above the conical sealing wall 8; wherein the ignition rod 2 movably passes through the central region of the sealing block 7 without affecting the reciprocating motion of the ignition rod 2, resulting in a compact structure. Specifically, in this embodiment, the sealing block 7 is annular, and its center can just pass through the ignition rod 2.

[0039] Multiple sealing block drive structures are connected to the sealing block 7 to drive the sealing block 7 to rise and fall. After ignition, the sealing block drive structures drive the sealing block 7 towards the conical sealing wall 8 until a sealing contact is formed between the sealing block 7 and the conical sealing wall 8. The sealing block 7 and the conical sealing wall 8 form an annular conical surface contact, resulting in a large sealing area, uniform contact, and good sealing effect.

[0040] For example, the sealing block 7 contacts the inner wall surface of the conical sealing wall 8, forming a third contact point 13. After ignition, the sealing device cylinder 5 is filled with high-pressure gas that compresses the spring, causing the sealing block 7 and the conical sealing wall 8 to come into close contact, forming a compression seal at the third contact point 13.

[0041] For example, multiple sealing block driving structures are distributed at intervals along the circumference of the sealing block 7, so that the force is balanced when the sealing block 7 is pushed, avoiding tilting or jamming of the sealing block 7 and ensuring the uniformity of the annular sealing contact. Specifically, in this embodiment, four sealing block driving structures are distributed at equal intervals along the circumference of the sealing block 7.

[0042] For example, such as Figure 1 As shown, the sealing block drive structure includes a sealing device cylinder 5, a second elastic element, and a connecting rod 6. The second elastic element can be a spring.

[0043] The second elastic element is disposed in the sealing device cylinder 5; the first end of the connecting rod 6 is inserted into the sealing device cylinder 1 and connected to the second elastic element, and the second end of the connecting rod 6 is fixedly connected to the sealing block 7.

[0044] Specifically, in this embodiment, there are four sealing device cylinders 5, which are evenly arranged around the circumference of the igniter cylinder 1 and fixed to the combustion and pressure cylinder wall 16. Each sealing device cylinder 5 is provided with a high-pressure gas inlet and outlet. There are four connecting rods 6, which are inserted into the four sealing device cylinders 5 from the bottom and connected to the springs inside the sealing device cylinders 5. This allows the compression and rebound of the springs to move the connecting rods 6. One end of each of the four connecting rods 6 is connected to the sealing block 7, and the connection points are evenly distributed around the circumference of the sealing block 7.

[0045] For example, after ignition is completed and the ignition cover 9 moves to the initial position, a sealing contact is formed between the top wall of the ignition cover 9 and the second end of the conical sealing wall 8. Specifically, a first contact point 11 is formed between the top wall of the ignition cover 9 and the upper end of the conical sealing wall 8.

[0046] For example, such as Figure 1 As shown, the top wall of the ignition cover 9 is a flat wall surface, and the side wall of the ignition cover 9 gradually bends outward from its top wall towards its opening in a trumpet shape.

[0047] For example, after ignition is completed and the ignition cover 9 moves to the initial position, the curved part of the side wall of the ignition cover 9 forms a sealed contact with the corner of the lower end of the mounting wall 10 of the mounting cavity. Figure 1As shown, the curved part of the side wall of the ignition cover 9 contacts the corner of the lower end of the mounting wall 10 of the mounting cavity, forming a second contact point.

[0048] In this embodiment, the top of the ignition cover is a flat wall, and the side wall gradually bends and expands from a straight cylinder, with its outlet in the shape of a trumpet. During non-ignition, the curved parts of the top wall and side wall of the ignition cover contact one side port of the conical sealing wall and the corner of the mounting wall, respectively, forming a first contact point and a second contact point. The contact points are not a single point, but a circular contact. Both contact points are in close contact with the spring force, thereby forming a compression seal to prevent gas from flowing into the combustion chamber. The greater the spring force, the better the sealing performance.

[0049] For example, the nozzle module 14 is located at the head of the combustion chamber and is used to supply fuel and air into the combustion chamber. The mounting wall 10 is cylindrical, with its upper end connected and fixed to the combustion cylinder wall 16 and its lower end connected and fixed to the flame tube wall 15.

[0050] For example, the sealing block 7, the conical sealing wall 8, the mounting wall 10, and the ignition cover 9 enclose a first chamber 18. The sealing block 7, the conical sealing wall 8, the mounting wall 10, and the combustion chamber wall 16 enclose a second chamber 19.

[0051] Specifically, the first chamber 18 and the second chamber 19 are not connected before ignition, during the process of the ignition cover 9 moving from the initial position to the combustion chamber, during ignition, and after the ignition cover 9 moves back to the initial position. During the process of the ignition cover 9 moving back to the initial position, the first chamber 18 and the second chamber 19 become connected.

[0052] In this embodiment, by setting a conical sealing wall and a sealing block, the inner cavity formed by the mounting wall is divided into two parts, namely the first chamber and the second chamber. Before ignition, during the advancement of the ignition rod, and during the ignition of the ignition rod, the high-pressure gas in the cylinder of the sealing device compresses the spring, causing the sealing block and the conical sealing wall to come into close contact to form a third contact point and form a compression seal, so that the first chamber and the second chamber are not connected. However, gas will enter the first chamber during the movement of the ignition rod. During the retraction of the ignition rod, when it is about to return to the initial position, the high-pressure gas in the cylinder of the sealing device is quickly discharged, causing the spring to rebound quickly, driving the connecting rod and the sealing block to move rapidly in a direction away from the flame tube wall, so that the first chamber and the second chamber are connected. At this time, some of the gas in the first chamber enters the second chamber rapidly through the lower opening of the conical sealing wall and is evenly distributed in the first chamber and the second chamber. When the ignition rod returns to the initial position, the first contact point forms a compression seal, and the first chamber and the second chamber are no longer connected.

[0053] The connecting rod moves the sealing block to connect the first and second chambers, increasing the volume of the chamber occupied by the gas. According to the ideal gas law, as the volume increases, the gas pressure decreases. Therefore, the gas pressure in the first and second chambers can be balanced, thereby reducing the gas pressure in the first chamber. At this time, the area outside the first chamber, i.e., inside the ignition shroud and the combustion chamber, is filled with high-pressure combustion gas, which increases the pressure difference between the inside and outside of the ignition shroud. This makes the first and second contact points more tightly sealed, preventing gas from flowing into the combustion chamber.

[0054] For example, such as Figure 4 As shown, the device also includes an air intake pipe 17, which passes through the combustion and pressure cylinder wall 16 and is connected to the second chamber 19.

[0055] Specifically, a hole can be made at the wall 16 of the combustion and pressure cylinder, and an air venting pipe 17 can be inserted and fixed to discharge the gas in the chamber. This can not only further increase the pressure difference between the inside and outside of the ignition cover 9, thereby improving the squeezing and sealing effect, but also prevent unburned gas from being mixed in with the gas. After the gas is drawn out by the air venting pipe 17, potential safety hazards can be eliminated.

[0056] like Figures 1 to 4 As shown, the working process of the ignition device for preventing deflagration during ignition of a hydrogen gas turbine provided by the present invention is as follows: The combustible mixture is delivered from the nozzle module 14 into the flame tube. High-pressure gas begins to fill the igniter cylinder 1, compressing the first elastic element 4 and causing the ignition rod 2 and ignition cover 9 to move together into the flame tube. Figure 2 As shown, the ignition shield 9 can isolate a portion of the combustible mixture from the rest of the combustible mixture in the combustion chamber. After the propulsion process is completed, high-voltage electricity is transmitted to the ignition rod 2 via the cable 3. The ignition rod 2 then discharges to generate an electric spark, igniting a small portion of the combustible mixture inside the ignition shield 9. The slow-burning flame spreads out along the outlet of the ignition shield 9 and gradually ignites the remaining combustible mixture. After ignition is completed, the high-pressure gas in the igniter cylinder 1 gradually releases, and the compressed first elastic element 4 gradually rebounds, simultaneously driving the ignition rod 2 and the ignition shield 9 to move away from the flame tube, i.e., reversing the movement.

[0057] During the above process, the sealing device cylinder 5 is filled with high-pressure gas that compresses the spring, causing the sealing block 7 and the conical sealing wall 8 to come into close contact, forming a compression seal at the third contact point 13, thus preventing the first chamber 18 and the second chamber 19 from communicating, but gas continues to enter the first chamber 18. When the ignition rod 2 and the ignition cover 9 are about to return to their initial positions, the high-pressure gas in the sealing device cylinder 5 is rapidly released, causing the spring inside to quickly rebound, driving the connecting rod 6 and the sealing block 7 to move rapidly in a direction away from the flame tube wall 15, thus connecting the first chamber 18 and the second chamber 19. Figure 3As shown, at this time, some of the gas in the first chamber 18 rapidly enters the second chamber 19 through the lower opening of the conical sealing wall 8, and is evenly distributed in the first chamber 18 and the second chamber 19. When the ignition rod 2 and the ignition cover 9 return to their initial positions, a compression seal is formed at the first contact point 11, and the first chamber 18 and the second chamber 19 are no longer connected. The movement of the connecting rod 6 and the sealing block 7 connects the first chamber 18 and the second chamber 19, which increases the volume of the chamber occupied by the gas. According to the ideal gas law, as the volume increases, the gas pressure decreases. Therefore, the gas pressure in the first chamber 18 and the second chamber 19 can be balanced, thereby reducing the gas pressure in the first chamber 18. At this time, the area outside the first chamber 18, that is, inside the ignition cover 9 and the combustion chamber, is filled with high-pressure combustion gas, thereby increasing the pressure difference between the inside and outside of the ignition cover 9. This makes the compression seal at the first contact point 11 and the second contact point 12 tighter, preventing the gas in the combustion chamber from flowing in, and thus blocking the backflow of high-temperature and high-pressure gas in the combustion chamber.

[0058] Example 2 Figure 4 As shown, a hole can be made at the wall 16 of the combustion and pressure cylinder, and an air venting pipe 17 can be inserted and fixed to discharge the gas in the chamber. This can not only further increase the pressure difference between the inside and outside of the ignition cover 9, thereby improving the squeezing and sealing effect, but also prevent unburned gas from being mixed in with the gas. After the gas is drawn out by the air venting pipe 17, potential safety hazards can be eliminated.

[0059] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An ignition device for preventing deflagration during ignition of a hydrogen gas turbine, characterized in that, The ignition device is located in the mounting cavity between the flame tube wall and the combustion cylinder wall; the ignition device includes: An ignition shroud, the opening of which is used to communicate with the combustion chamber of the gas turbine; An ignition rod, with a cable at its first end and a second end passing through and fixed to the top wall of the ignition cover; A drive assembly, connected to the ignition rod, is used to drive the ignition rod and the ignition cover to move; A sealing assembly is disposed in the mounting cavity; wherein... When ignition is required, the drive assembly drives the ignition cover to move from the initial position of the mounting cavity into the combustion chamber, so that when ignition is required, a small portion of the combustible mixture in the ignition cover is ignited first, and then the slow-burning flame spreads out along the opening of the ignition cover and spreads to the surroundings, gradually igniting the remaining combustible mixture in the combustion chamber. After ignition, the drive assembly drives the ignition cover back to the initial position, while the sealing assembly seals the mounting cavity to prevent gas from flowing into the combustion chamber.

2. The ignition device according to claim 1, characterized in that, The drive assembly includes an igniter cylinder and a first elastic element; The igniter cylinder passes through and is fixed to the wall of the combustion and pressure cylinder; The ignition rod is installed through the ignition cylinder; The first elastic element is disposed in the igniter cylinder and connected to the ignition rod; wherein, When ignition is required, high-pressure gas is injected into the igniter cylinder. The high-pressure gas compresses the first elastic element, driving the ignition rod and the ignition cover to move simultaneously into the combustion chamber. After ignition, the high-pressure gas in the igniter cylinder is released, and the first elastic element gradually rebounds, driving the ignition rod and the ignition cover to move simultaneously away from the combustion chamber.

3. The ignition device according to claim 1, characterized in that, The sealing assembly includes a sealing block, a conical sealing wall, and multiple sealing block drive structures; The conical sealing wall is located above the ignition cover. The first end of the conical sealing wall is fixed to the mounting wall of the mounting cavity, and the second end of the conical sealing wall is inclined from the mounting wall toward the axis of the mounting cavity. The sealing block is movably disposed above the conical sealing wall; wherein the ignition rod is movably disposed through the central region of the sealing block; Multiple sealing block drive structures are connected to the sealing block for driving the sealing block to rise and fall; wherein, after ignition, the sealing block drive structure drives the sealing block to move toward the conical sealing wall until a sealing contact is formed between the sealing block and the conical sealing wall.

4. The ignition device according to claim 3, characterized in that, The plurality of the sealing block drive structures are distributed at circumferential intervals along the sealing block.

5. The ignition device according to claim 3, characterized in that, The sealing block drive structure includes a sealing device cylinder, a second elastic element, and a connecting rod. The second elastic element is disposed in the cylinder of the sealing device; The first end of the connecting rod is inserted into the cylinder of the sealing device and connected to the second elastic element, and the second end of the connecting rod is fixedly connected to the sealing block.

6. The ignition device according to claim 3, characterized in that, After ignition is completed and the ignition cover moves to the initial position, a sealing contact is formed between the top wall of the ignition cover and the second end of the conical sealing wall.

7. The ignition device according to claim 1, characterized in that, The top wall of the ignition cover is a flat surface, and the side walls of the ignition cover gradually bend outward from the top wall towards the opening in a trumpet shape.

8. The ignition device according to claim 1, characterized in that, After ignition is completed and the ignition cover moves to the initial position, the curved part of the side wall of the ignition cover forms a sealed contact with the corner of the lower end of the mounting wall of the mounting cavity.

9. The ignition device according to claim 3, characterized in that, The sealing block, the conical sealing wall, the mounting wall, and the ignition cover together form a first chamber; The sealing block, the conical sealing wall, the mounting wall, and the combustion and pressure cylinder wall together form a second chamber; wherein... Before ignition, during the process of the ignition cover being moved from the initial position to the combustion chamber, during ignition, and after the ignition cover is moved back to the initial position, the first chamber and the second chamber are not in communication. During the process of the ignition cover moving back to the initial position, the first chamber and the second chamber are connected.

10. The ignition device according to claim 9, characterized in that, It also includes an air intake pipe that passes through the wall of the combustion and pressure cylinder and is connected to the second chamber.

Images