Gas turbine and its ignition device

Abstract

This invention discloses a gas turbine and its ignition device. The ignition device includes a housing and an ignition rod. The housing has a perforation, a first sealing surface, and a first conical surface. Both the first sealing surface and the first conical surface are annular surfaces surrounding the perforation. The ignition rod is movably inserted into the perforation along its length, allowing it to switch between an ignition position and a retracted position. The ignition rod has an ignition end, a second sealing surface, and a second conical surface. The second sealing surface is an annular surface corresponding to the first sealing surface, and the second conical surface is an annular surface corresponding to the first conical surface. In the ignition position, the ignition end extends out of the housing; in the retracted position, the ignition end retracts into the housing. The second sealing surface and the first sealing surface are in a sealing fit, and the second conical surface and the first conical surface are in a sealing fit. At least one of the first and second sealing surfaces has a serrated edge or a honeycomb core. The ignition device of this invention can effectively improve the performance of the gas turbine.

Description

Technical Field

[0001] This invention relates to the field of gas turbine technology, and more specifically to a gas turbine and its ignition device. Background Technology

[0002] A gas turbine mainly consists of three components: a compressor, a combustion chamber, and a turbine. The compressor exhaust mixes with fuel in the combustion chamber and participates in combustion. The resulting high-temperature gas is then transported to the turbine to perform work. Ignition devices in the combustion chamber are divided into fixed and moving types, each with its own advantages and disadvantages. For moving ignition devices, the ignition rod retracts from the combustion chamber after ignition, ensuring that the ignition rod is not subjected to prolonged high-temperature corrosion from the combustion chamber gases, thus extending the ignition rod's service life.

[0003] In related technologies, a conical surface seal is used between the housing and the ignition rod of a motion ignition device. Both the housing and the ignition rod have conical surfaces. After the ignition rod ignites and retracts from the combustion chamber, the conical surface of the ignition rod contacts the conical surface of the housing, achieving a seal. However, the temperature and pressure inside the combustion chamber are very high, and the seal provided by the conical surface alone is insufficient, resulting in significant leakage of high-temperature gas and ultimately affecting the performance of the gas turbine. Therefore, improving the sealing performance of the ignition device is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the present invention proposes an ignition device to improve the sealing performance of the ignition device.

[0006] The ignition device of the present invention includes a housing and an ignition rod. The housing has a perforation, a first sealing surface, and a first conical surface. Both the first sealing surface and the first conical surface are annular surfaces surrounding the perforation, with one of the first conical surface and the first sealing surface located outside the other. The ignition rod is movably inserted into the perforation along its length direction to switch between an ignition position and a retracted position. The ignition rod has an ignition end, a second sealing surface, and a second conical surface. The second sealing surface is an annular surface corresponding to the first sealing surface, and the second conical surface is an annular surface corresponding to the first conical surface. In the ignition position, the ignition end extends out of the housing; in the retracted position, the ignition end retracts into the housing. The second sealing surface and the first sealing surface are in a sealing fit, and the second conical surface and the first conical surface are in a sealing fit. At least one of the first sealing surface and the second sealing surface is provided with a serrated edge or a honeycomb core.

[0007] Optionally, the first sealing surface is located on the outside of the first conical surface, and the second sealing surface is located on the outside of the second conical surface.

[0008] Optionally, the housing has a third sealing surface, which is an annular surface surrounding the perforation and located inside the first conical surface; the ignition rod has a fourth sealing surface, which is an annular surface corresponding to the third sealing surface and located inside the second conical surface; in the retracted position, the fourth sealing surface and the third sealing surface are in a sealing engagement.

[0009] Optionally, at least one of the third sealing surface and the fourth sealing surface is provided with serrations or a honeycomb core.

[0010] Optionally, both the third sealing surface and the fourth sealing surface are arranged perpendicular to the length direction of the ignition rod; and / or, one of the third sealing surface and the fourth sealing surface is provided with grates, and the other of the third sealing surface and the fourth sealing surface is provided with a honeycomb core.

[0011] Optionally, both the first sealing surface and the second sealing surface are arranged perpendicular to the length direction of the ignition rod; and / or, one of the second sealing surface and the first sealing surface is provided with serrations, and the other of the second sealing surface and the first sealing surface is provided with a honeycomb core.

[0012] Optionally, the housing has a receiving cavity and a communicating port, both the perforation and the communicating port communicating with the receiving cavity, and the communicating port and the perforation being arranged opposite to each other along the length direction of the ignition rod; the ignition rod includes a rod body, a sealing ring and a piston ring, the rod body being inserted into the perforation, the ignition end being disposed on the rod body, the sealing ring and the piston ring being sleeved on the rod body and connected to the rod body, the piston ring being disposed closer to the communicating port than the sealing ring, the second sealing surface and the second conical surface being disposed on the sealing ring, the outer peripheral surface of the piston ring sealingly engaging with the inner wall surface of the receiving cavity, wherein at least one of the outer peripheral surface of the piston ring and the inner wall surface of the receiving cavity is provided with serrations or a honeycomb core; wherein the ignition end extends out of the receiving cavity through the communicating port, and the ignition end retracts into the receiving cavity through the communicating port.

[0013] Optionally, the outer circumferential surface of the piston ring is provided with serrations or a honeycomb core, and the inner wall surface of the accommodating cavity is a plane.

[0014] Optionally, the ignition device further includes an elastic element disposed within the accommodating cavity, the elastic element being connected to the housing and the ignition rod, and the elastic element being used to provide elastic force to the ignition rod along its length direction.

[0015] The present invention also provides a gas turbine.

[0016] The gas turbine of the present invention includes the ignition device described in any of the above claims.

[0017] The ignition device of the present invention, when the ignition rod is in the retracted position, not only utilizes the sealing engagement of the second conical surface and the first conical surface to achieve a seal between the housing and the ignition rod, but also utilizes the sealing engagement of the second sealing surface provided on the ignition rod and the first sealing surface provided on the housing. Furthermore, at least one of the first and second sealing surfaces is provided with serrated edges or a honeycomb core, which effectively reduces the effective flow area between the second and first sealing surfaces, thus achieving a seal between the housing and the ignition rod. Therefore, the sealing performance between the ignition rod and the housing can be effectively improved, reducing the leakage of high-temperature gas from the combustion chamber through the ignition device, thereby effectively improving the performance of the gas turbine. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an ignition device according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A partial structural diagram.

[0020] Figure 3 This is a schematic diagram of the ignition device according to another embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the ignition device according to another embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the ignition device according to another embodiment of the present invention.

[0023] Figure label:

[0024] 100. Ignition device;

[0025] 1. Shell; 11. Cover plate; 111. Perforation; 112. First sealing surface; 113. First conical surface; 114. Third sealing surface; 12. Cylinder; 13. Base; 131. Communicating port; 14. Receiving cavity;

[0026] 2. Ignition rod; 21. Rod body; 211. Ignition end; 22. Sealing ring; 221. Second sealing surface; 222. Second conical surface; 223. Fourth sealing surface; 23. Piston ring;

[0027] 3. Elastic components;

[0028] 4. Tie rod screws;

[0029] 5. Nuts. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] like Figures 1 to 5 As shown, the ignition device 100 of this embodiment includes a housing 1 and an ignition rod 2. The housing 1 has a through hole 111, a first sealing surface 112, and a first conical surface 113. Both the first sealing surface 112 and the first conical surface 113 are annular surfaces surrounding the through hole 111, with one of the first conical surface 113 and the first sealing surface 112 located outside the other. The ignition rod 2 is movably inserted into the through hole 111 along its length direction, so that the ignition rod 2 can switch between an ignition position and an exit position. The ignition rod 2 has an ignition end 211, a second sealing surface 221, and a second conical surface 222. The second sealing surface 221 is an annular surface corresponding to the first sealing surface 112, and the second conical surface 222 is an annular surface corresponding to the first conical surface 113. In the ignition position, the ignition end 211 extends out of the housing 1. In the withdrawn position, the ignition end 211 retracts into the housing 1, the second sealing surface 221 is sealed to the first sealing surface 112, and the second conical surface 222 is sealed to the first conical surface 113. At least one of the first sealing surface 112 and the second sealing surface 221 is provided with serrations or a honeycomb core.

[0032] In this context, "inward" refers to the direction close to the centerline of the ignition rod 2 on a plane perpendicular to its length; "outward" refers to the direction away from the centerline of the ignition rod 2 on a plane perpendicular to its length. When the first conical surface 113 is located inside the first sealing surface 112, the first conical surface 113 is closer to the centerline of the ignition rod 2 than the first sealing surface 112.

[0033] At least one of the first sealing surface 112 and the second sealing surface 221 is provided with a comb-like tooth pattern or a honeycomb core. This can be understood as: the first sealing surface 112 is provided with a comb-like tooth pattern, and the second sealing surface 221 is provided with a honeycomb core; or, as... Figure 5 As shown, the first sealing surface 112 is provided with a honeycomb core, and the second sealing surface 221 is provided with fangs; or, only the first sealing surface 112 is provided with fangs; or, only the first sealing surface 112 is provided with a honeycomb core; or, as shown... Figures 1 to 4 As shown, only the second sealing surface 221 is provided with serrated teeth; or, only the second sealing surface 221 is provided with a honeycomb core.

[0034] When the ignition device 100 of this embodiment needs to perform an ignition operation, the ignition rod 2 moves along its length direction, so that the ignition end 211 extends out of the housing 1 and into the combustion chamber; after the ignition operation is completed, the ignition rod 2 moves along its length direction, so that the ignition end 211 retracts into the housing 1 and returns to the combustion chamber, preventing the ignition rod 2 from being corroded by the high temperature of the high temperature gas in the combustion chamber for a long time.

[0035] Understandably, when ignition is not performed in the combustion chamber, the gas temperature and pressure are both low, making it difficult for the gas to leak through the gap between the housing 1 and the ignition rod 2. However, after ignition is complete, the gas temperature and pressure generated by combustion are high, making it easier for the gas to leak through the gap between the housing 1 and the ignition rod 2. Therefore, a seal is required between the housing 1 and the ignition rod 2. In other words, when the ignition rod 2 is in the retracted position, a seal is necessary between the housing 1 and the ignition rod 2.

[0036] In this embodiment of the invention, the ignition device 100, when the ignition rod 2 is in the retracted position, not only utilizes the second conical surface 222 and the first conical surface 113 to achieve a sealing fit between the housing 1 and the ignition rod 2, but also utilizes the second sealing surface 221 provided on the ignition rod 2 to seal with the first sealing surface 112 provided on the housing 1. Furthermore, at least one of the first sealing surface 112 and the second sealing surface 221 is provided with serrated edges or a honeycomb core, which effectively reduces the effective flow area between the second sealing surface 221 and the first sealing surface 112, thus achieving a seal between the housing 1 and the ignition rod 2. Therefore, the sealing performance between the ignition rod 2 and the housing 1 can be effectively improved, reducing the leakage of high-temperature gas from the combustion chamber through the ignition device 100, thereby effectively improving the performance of the gas turbine.

[0037] Optionally, such as Figures 1 to 5 As shown, the first sealing surface 112 is located on the outside of the first conical surface 113, and the second sealing surface 221 is located on the outside of the second conical surface 222.

[0038] It is understandable that when at least one of the first sealing surface 112 and the second sealing surface 221 is provided with serrations or a honeycomb core, a gap will inevitably exist between the first sealing surface 112 and the second sealing surface 221, resulting in unavoidable gas leakage between them. However, when the leaking gas flows through the gap between the first sealing surface 112 and the second sealing surface 221, the leaking gas will experience throttling and pressure reduction, significantly reducing the pressure of the gas flowing between the first sealing surface 112 and the second sealing surface 221.

[0039] By placing the first sealing surface 112 outside the first conical surface 113 and the second sealing surface 221 outside the second conical surface 222, in the exit position, the gas in the combustion chamber must first flow through the gap between the first sealing surface 112 and the second sealing surface 221 before it can flow out through the gap between the first conical surface 113 and the second conical surface 222. After the gas in the combustion chamber flows through the gap between the first sealing surface 112 and the second sealing surface 221, the gas pressure is greatly reduced, which effectively reduces the risk of gas flowing out through the gap between the first conical surface 113 and the second conical surface 222, further reducing the risk of high-temperature gas leaking from the ignition device 100 and further improving the performance of the gas turbine.

[0040] Optionally, such as Figures 1 to 5 As shown, the housing 1 has a third sealing surface 114, which is an annular surface surrounding the through hole 111 and is located inside the first conical surface 113. The ignition rod 2 has a fourth sealing surface 223, which is located inside the second conical surface 222 and is an annular surface corresponding to the third sealing surface 114. In the retracted position, the fourth sealing surface 223 and the third sealing surface 114 are in a sealing engagement.

[0041] By providing a third sealing surface 114 on the housing 1 and a fourth sealing surface 223 on the ignition rod 2, with the fourth sealing surface 223 located inside the second conical surface 222, the fourth sealing surface 223 and the third sealing surface 114 are sealed together in the retracted position. This ensures that in the retracted position, the gas in the combustion chamber must first flow through the gap between the first sealing surface 112 and the second sealing surface 221, then through the gap between the first conical surface 113 and the second conical surface 222, and finally through the gap between the fourth sealing surface 223 and the third sealing surface 114.

[0042] This design creates at least three seals between the casing 1 and the ignition rod 2. Gas in the combustion chamber must sequentially overcome at least three seals before leaking from the ignition device 100, further reducing the risk of high-temperature gas leakage from the ignition device 100 and improving the performance of the gas turbine. Specifically, the first sealing surface 112 and the second sealing surface 221 form one seal; the first conical surface 113 and the second conical surface 222 form another seal; and the fourth sealing surface 223 and the third sealing surface 114 form yet another seal.

[0043] Optionally, such as Figures 1 to 5 As shown, at least one of the third sealing surface 114 and the fourth sealing surface 223 is provided with fangs or honeycomb core.

[0044] At least one of the third sealing surface 114 and the fourth sealing surface 223 is provided with a comb-like tooth pattern or a honeycomb core, which can be understood as: the third sealing surface 114 is provided with a comb-like tooth pattern, and the fourth sealing surface 223 is provided with a honeycomb core; or, as... Figure 5 As shown, the third sealing surface 114 is provided with a honeycomb core, and the fourth sealing surface 223 is provided with fangs; or, only the third sealing surface 114 is provided with fangs; or, only the third sealing surface 114 is provided with a honeycomb core; or, as shown... Figures 1 to 4 As shown, only the fourth sealing surface 223 is provided with serrated teeth; or, only the fourth sealing surface 223 is provided with a honeycomb core.

[0045] Understandably, if the third sealing surface 114 and the fourth sealing surface 223 are designed as planar structures, with the ignition rod 2 in the retracted position and the first conical surface 113 and the second conical surface 222 sealingly engaged, ensuring the sealing engagement of the third sealing surface 114 and the fourth sealing surface 223 requires not only ensuring the machining accuracy of the first conical surface 113, the second conical surface 222, the third sealing surface 114, and the fourth sealing surface 223, but also ensuring the relative positions of the first conical surface 113 and the third sealing surface 114, as well as the relative positions of the second conical surface 222 and the fourth sealing surface 223. Therefore, the machining accuracy requirements for the housing 1 and the ignition rod 2 are high, resulting in higher machining costs.

[0046] By providing at least one of the third sealing surface 114 and the fourth sealing surface 223 with serrations or honeycomb cores, the machining accuracy requirements for the housing 1 and the ignition rod 2 can be reduced compared to making both the third sealing surface 114 and the fourth sealing surface 223 planar structures, thereby reducing the cost of the ignition device 100.

[0047] Optionally, such as Figures 1 to 5 As shown, the first sealing surface 112 and the second sealing surface 221 are both arranged perpendicular to the length direction of the ignition rod 2.

[0048] Therefore, the second sealing surface 221 only contacts the first sealing surface 112 when the ignition rod 2 moves along its length to the retracted position. During the movement of the ignition rod 2 along its length, the second sealing surface 221 does not contact the first sealing surface 112. This avoids wear between the second sealing surface 221 and the first sealing surface 112 due to friction during the movement of the ignition rod 2 along its length, thus extending the service life of the ignition device 100.

[0049] Optionally, one of the second sealing surface 221 and the first sealing surface 112 is provided with serrations, and the other of the second sealing surface 221 and the first sealing surface 112 is provided with a honeycomb core.

[0050] For example, such as Figure 5 As shown, the first sealing surface 112 is provided with a honeycomb core, and the second sealing surface 221 is provided with fangs.

[0051] Therefore, when the ignition rod 2 is in the retracted position, the honeycomb core and the comb seals together, which helps to further improve the sealing between the first sealing surface 112 and the second sealing surface 221, further reduce the risk of high-temperature gas leakage from the ignition device 100, and further improve the performance of the gas turbine.

[0052] Optionally, both the third sealing surface 114 and the fourth sealing surface 223 are arranged perpendicular to the length direction of the ignition rod 2.

[0053] Therefore, the fourth sealing surface 223 will only contact the third sealing surface 114 when the ignition rod 2 moves along its length to the retracted position. During the movement of the ignition rod 2 along its length, the fourth sealing surface 223 will not contact the third sealing surface 114. This avoids wear between the fourth sealing surface 223 and the third sealing surface 114 due to friction during the movement of the ignition rod 2 along its length, thus extending the service life of the ignition device 100.

[0054] Optionally, one of the third sealing surface 114 and the fourth sealing surface 223 is provided with fangs, and the other of the third sealing surface 114 and the fourth sealing surface 223 is provided with a honeycomb core.

[0055] For example, such as Figure 5 As shown, the third sealing surface 114 is provided with a honeycomb core, and the fourth sealing surface 223 is provided with fangs.

[0056] Therefore, when the ignition rod 2 is in the retracted position, the honeycomb core and the comb seal cooperate to further improve the sealing performance between the third sealing surface 114 and the fourth sealing surface 223, further reduce the risk of high-temperature gas leakage from the ignition device 100, and further improve the performance of the gas turbine.

[0057] In some embodiments, the housing 1 has a receiving cavity 14 and a communicating port 131. Both the through hole 111 and the communicating port 131 communicate with the receiving cavity 14, and the communicating port 131 and the through hole 111 are arranged opposite to each other along the length direction of the ignition rod 2. The ignition rod 2 includes a rod body 21, a sealing ring 22, and a piston ring 23. Both the sealing ring 22 and the piston ring 23 are sleeved on the rod body 21 and connected to the rod body 21. The rod body 21 is inserted into the through hole 111, and the ignition end 211 is located on the rod body 21. The piston ring 23 is located closer to the communicating port 131 than the sealing ring 22. The second sealing surface 221 and the second conical surface 222 are both located on the sealing ring 22, and the outer peripheral surface of the piston ring 23 is in sealing fit with the inner wall surface of the receiving cavity 14. At least one of the outer peripheral surface of the piston ring 23 and the inner wall surface of the receiving cavity 14 is provided with serrations or a honeycomb core. The ignition end 211 extends out of the receiving cavity 14 through the connecting port 131 and retracts into the receiving cavity 14 through the connecting port 131.

[0058] Wherein, at least one of the outer peripheral surface of the piston ring 23 and the inner wall surface of the accommodating cavity 14 is provided with serrations or a honeycomb core, which can be understood as: the outer peripheral surface of the piston ring 23 is provided with serrations, and the inner wall surface of the accommodating cavity 14 is provided with a honeycomb core; or, the outer peripheral surface of the piston ring 23 is provided with a honeycomb core, and the inner wall surface of the accommodating cavity 14 is provided with serrations; or, as... Figure 1 As shown, only the outer circumferential surface of the piston ring 23 is provided with serrated teeth; or, as... Figures 3 to 5 As shown, only the outer circumferential surface of the piston ring 23 is provided with a honeycomb core grid; or, only the inner wall surface of the receiving cavity 14 is provided with a comb-like tooth; or, only the inner wall surface of the receiving cavity 14 is provided with a honeycomb core grid.

[0059] In practical use, after the ignition rod 2 completes the ignition operation, the high-temperature gas inside the combustion chamber enters the receiving cavity 14 through the connecting port 131 and pushes the piston ring 23, causing the ignition end 211 to retract into the receiving cavity 14. To ensure that the ignition end 211 retracts into the receiving cavity 14 within a preset time, the pressure difference on both sides of the piston ring 23 needs to be maintained at a preset value, that is, the pressure difference between the side of the piston ring 23 away from the connecting port 131 and the side of the piston ring 23 close to the connecting port 131 is a preset value. Therefore, a seal needs to be formed between the piston ring 23 and the inner wall of the receiving cavity 14.

[0060] By providing at least one of the outer peripheral surface of the piston ring 23 and the inner wall surface of the accommodating cavity 14 with serrations or honeycomb cores, the sealing between the outer peripheral surface of the piston ring 23 and the inner wall surface of the accommodating cavity 14 can be effectively guaranteed during the movement of the piston ring 23 relative to the housing 1. This ensures that the ignition end 211 can retract into the accommodating cavity 14 within a preset time, avoiding prolonged high-temperature erosion of the ignition end 211 by the high-temperature gas in the combustion chamber, which is beneficial to further extend the service life of the ignition device 100.

[0061] Optionally, the rod 21, sealing ring 22, and piston ring 23 are an integral structure.

[0062] By making the rod 21, sealing ring 22 and piston ring 23 into an integrated structure, the number of parts of the ignition device 100 can be effectively reduced, thereby improving the assembly efficiency of the ignition device 100 and reducing the cost of the ignition device 100.

[0063] Optionally, the outer circumferential surface of the piston ring 23 is provided with serrations or a honeycomb core, and the inner wall surface of the accommodating cavity 14 is flat.

[0064] Understandably, if serrations or honeycomb grids are provided on the inner wall of the accommodating cavity 14, the inner wall of the accommodating cavity 14 needs to be machined within the confined space, making the manufacturing of serrations or honeycomb grids quite difficult. However, the external space of the piston ring 23 can be used as a machining space, facilitating the manufacturing of serrations or honeycomb grids. Therefore, having serrations or honeycomb grids on the outer circumferential surface of the piston ring 23, and a flat inner wall of the accommodating cavity 14, further facilitates the manufacturing of the ignition device 100 and further reduces its cost.

[0065] Optionally, the housing 1 includes a cover plate 11, a cylinder 12, and a base 13. The cover plate 11 and the base 13 are respectively located at opposite ends of the cylinder 12 along the length of the ignition rod 2. A through hole 111 is provided in the cover plate 11, and a connecting port 131 is provided in the base 13. The cover plate 11, the cylinder 12, and the base 13 form a receiving cavity 14.

[0066] For example, the base 13 and the cylinder 12 are an integral structure. The base 13 has a first connecting part located on the outside of the cylinder 12, and the first connecting part has a threaded hole. The cover plate 11 has a second connecting part located on the outside of the cylinder 12, and the second connecting part has a connecting hole. One end of the pull rod screw 4 is threadedly connected to the threaded hole, and the other end of the pull rod screw 4 passes through the connecting hole and is threadedly connected to the nut 5.

[0067] Optionally, the ignition device 100 further includes an elastic element 3 disposed within the receiving cavity 14. The elastic element 3 is connected to the housing 1 and the ignition rod 2, and is used to provide elastic force to the ignition rod 2 along its length.

[0068] The elastic element 3 provides a spring force along the length of the ignition rod 2, allowing it to move to the retracted position after ignition, under the combined action of the high-temperature gas inside the combustion chamber and the spring force of the elastic element 3. Therefore, by using elastic elements 3 with different spring forces between the housing 1 and the ignition rod 2, the time it takes for the ignition rod 2 to move from the ignition position to the retracted position can vary. This allows users to design the time for the ignition rod 2 to move from the ignition position to the retracted position according to actual needs, better meeting user requirements.

[0069] Optionally, the elastic element 3 is a compression spring, which is located between the base 13 and the piston ring 23. The elastic element 3 is used to provide a spring force to the ignition rod 2 in the direction from the connecting port 131 to the through hole 111. Alternatively, the elastic element 3 is a tension spring, which is located between the base 13 and the piston ring 23. The elastic element 3 is used to provide a spring force to the ignition rod 2 in the direction from the through hole 111 to the connecting port 131.

[0070] To make the technical solution of the present invention easier to understand, the technical solution of the present invention will be further described below with the example that the length direction of the ignition rod 2 is consistent with the vertical direction. Wherein, the vertical direction is as follows... Figures 1 to 5 As shown.

[0071] A cover plate 11 is located on the upper side of the base 13, and a through hole 111 is located on the upper side of the connecting port 131. The lower end of the ignition rod 2 is the ignition end 211. When the ignition rod 2 moves from top to bottom, it can move from the retracted position to the ignition position; when the ignition rod 2 moves from bottom to top, it can move from the ignition position to the retracted position. The ignition end 211 can be provided with an ignition positive electrode and an ignition negative electrode. When the ignition end 211 extends into the combustion chamber, both the ignition positive electrode and the ignition negative electrode extend into the combustion chamber to perform the ignition operation.

[0072] The following is for reference. Figures 1 to 5 The working process of the ignition rod 2 in this embodiment of the invention is described as follows:

[0073] Under natural conditions, the ignition rod 2, under the influence of gravity, causes the ignition end 211 to extend into the combustion chamber. After the ignition rod 2 completes the ignition operation, the piston ring 23 of the ignition rod 2 is pushed upward by the high-pressure gas in the combustion chamber. During the movement of the ignition rod 2, the outer circumferential surface of the piston ring 23 seals against the inner wall of the accommodating cavity 14, reducing the amount of high-temperature gas leaking from the outer circumferential surface of the piston ring 23 against the inner wall of the accommodating cavity 14. When the ignition rod 2 moves to the retracted position, the first sealing surface 112 and the second sealing surface 221 seal against each other to form a seal, the first conical surface 113 and the second conical surface 222 seal against each other to form a seal, and the fourth sealing surface 223 seals against the third sealing surface 114 to form a seal. The flow direction of the high-pressure gas in the combustion chamber is as follows: Figures 1 to 5 As shown by the arrow in the image.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An ignition device, characterized in that, include: The housing has a perforation, a first sealing surface, and a first conical surface, wherein the first sealing surface and the first conical surface are both annular surfaces surrounding the perforation, and one of the first conical surface and the first sealing surface is located outside the other; An ignition rod is movably inserted into the through hole along its length so that the ignition rod can switch between an ignition position and an exit position. The ignition rod has an ignition end, a second sealing surface, and a second conical surface. The second sealing surface is an annular surface corresponding to the first sealing surface, and the second conical surface is an annular surface corresponding to the first conical surface. At the ignition position, the ignition end extends outside the housing; In the exit position, the ignition end retracts into the housing, the second sealing surface is in sealing engagement with the first sealing surface, and the second conical surface is in sealing engagement with the first conical surface, wherein at least one of the first sealing surface and the second sealing surface is provided with serrations or a honeycomb core.

2. The ignition device according to claim 1, characterized in that, The first sealing surface is located on the outside of the first conical surface, and the second sealing surface is located on the outside of the second conical surface.

3. The ignition device according to claim 2, characterized in that, The housing has a third sealing surface, which is an annular surface surrounding the perforation and is located inside the first conical surface. The ignition rod has a fourth sealing surface, which is located inside the second conical surface. The fourth sealing surface is an annular surface corresponding to the third sealing surface. In the exit position, the fourth sealing surface is in sealing engagement with the third sealing surface.

4. The ignition device according to claim 3, characterized in that, At least one of the third sealing surface and the fourth sealing surface is provided with serrations or a honeycomb core.

5. The ignition device according to claim 4, characterized in that, Both the third sealing surface and the fourth sealing surface are arranged perpendicular to the length direction of the ignition rod; and / or One of the third sealing surface and the fourth sealing surface is provided with serrated teeth, and the other of the third sealing surface and the fourth sealing surface is provided with a honeycomb core.

6. The ignition device according to claim 1, characterized in that, Both the first sealing surface and the second sealing surface are arranged perpendicular to the length direction of the ignition rod; and / or One of the second sealing surface and the first sealing surface is provided with serrated teeth, and the other of the second sealing surface and the first sealing surface is provided with a honeycomb core.

7. The ignition device according to any one of claims 1-6, characterized in that, The housing has a receiving cavity and a communicating port. Both the perforation and the communicating port are connected to the receiving cavity. The communicating port and the perforation are arranged opposite to each other along the length direction of the ignition rod. The ignition rod includes a rod body, a sealing ring, and a piston ring. The rod body is inserted into the through hole, and the ignition end is located on the rod body. The sealing ring and the piston ring are both sleeved on the rod body and connected to the rod body. The piston ring is located closer to the communication port than the sealing ring. The second sealing surface and the second conical surface are both located on the sealing ring. The outer peripheral surface of the piston ring is in sealing fit with the inner wall surface of the accommodating cavity. At least one of the outer peripheral surface of the piston ring and the inner wall surface of the accommodating cavity is provided with serrations or a honeycomb core. The ignition end extends out of the accommodating cavity through the connecting port, and the ignition end retracts into the accommodating cavity through the connecting port.

8. The ignition device according to claim 7, characterized in that, The outer circumferential surface of the piston ring is provided with serrations or a honeycomb core, and the inner wall surface of the accommodating cavity is a plane.

9. The ignition device according to claim 7, characterized in that, The ignition device further includes an elastic element disposed within the accommodating cavity. The elastic element is connected to the housing and the ignition rod, and is used to provide elastic force to the ignition rod along its length.

10. A gas turbine, characterized in that, The ignition device includes any one of claims 1-9.

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