An integrally designed oxygen enriched turbine engine injector

Abstract

The present application relates to the technical field of turbine engine, especially relates to an integrated design oxygen-enriched turbine engine injector, which comprises a central dovetail structure of an injection head integrally formed on the inner side of an injector main body and an igniter seat fixed on one side of the outer wall of the injector main body, the outer edges of the upper and lower ends of the injector main body are respectively fixed with mounting flange one and mounting flange two, the inner side of the middle part of the injector main body is provided with an oxygen-enriched gas flow channel, and the outer side of the oxygen-enriched gas flow channel is provided with a high-pressure air flow channel opened in the injector main body. The present application effectively realizes fuel injection atomization and efficient mixing of gas, significantly improves the speed and efficiency of combustion, and the injector main body is designed based on the 3D printing process, without mechanical addition, welding and assembly, which not only avoids the problems of large welding deformation, high-temperature and high-pressure sealing difficulty in the prior art, but also improves the overall reliability of the injector, and helps to prolong the service life of the injector main body.

Description

Technical Field

[0001] This invention relates to the field of turbine engine technology, and more particularly to an integrated oxygen-enriched turbine engine injector. Background Technology

[0002] The function of an oxygen-enriched turbine engine injector is to achieve high-quality fuel atomization and efficient mixing of fuel and oxidizer gas within a wide operating range, before injecting it into the combustion chamber for combustion. For an oxygen-enriched turbine engine, the oxidizer consists of two parts: high-pressure air captured from the atmosphere and pressurized by a compressor, and oxygen-enriched gas generated by the high-temperature oxygen-enriched gas generator and then used in the turbine. Existing injectors have high integration and complex flow channel structures. Injectors designed based on traditional machining, welding, and assembly processes inevitably suffer from problems such as large welding deformation, difficulties in designing high-temperature and high-pressure seals, and the accumulation of machining and assembly errors during actual use. This results in low overall injector reliability and low efficiency in the mixing of high-pressure air, oxygen-enriched gas, and fuel, which has a certain impact on engine performance. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides an integrated oxygen-enriched turbine engine injector, which solves the problems of large welding deformation, difficulty in designing high-temperature and high-pressure seals, and accumulation of machining and assembly errors in existing engine injectors.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An integrated oxygen-enriched turbine engine injector includes a central dovetail structure of the injector head integrally formed inside the injector body and an igniter seat fixed to one side of the outer wall of the injector body. Mounting flange one and mounting flange two are respectively fixed to the outer edges of the upper and lower ends of the injector body. An oxygen-enriched gas flow channel is provided in the middle of the inner side of the injector body. A high-pressure air flow channel is provided outside the oxygen-enriched gas flow channel and is opened inside the injector body. The outlets of the oxygen-enriched gas flow channel and the high-pressure air flow channel meet at an angle of 30-45°. The injector body is fixed with a radial support beam that supports the dovetail structure at the center of the injector head, the oxygen-enriched gas flow channel, and the high-pressure air flow channel. A fuel flow channel is integrally formed inside the radial support beam. A circumferentially connected gas film annular cavity is provided on the outside of the high-pressure air flow channel, and the igniter seat passes through one side of the gas film annular cavity.

[0005] As a further optimization of the present invention, the bottom of the dovetail structure at the center of the injection head is provided with a conical cavity for thermal protection of the injection head, and the top cone angle of the conical cavity is not greater than 100°. The top of the dovetail structure at the center of the injection head is provided with a blunt head. At the bottom of the dovetail structure at the center of the injection head, a number of through holes are provided at intervals, and the through holes penetrate the inner wall and outer wall of the dovetail structure at the center of the injection head respectively.

[0006] As a further optimization of the present invention, the oxygen-enriched gas flow channel includes an oxygen-enriched gas inlet located at the top of the inner side of the injector body, and an oxygen-enriched gas annular slot outlet located at the bottom of the inner side of the injector body. The top of the oxygen-enriched gas annular slot outlet is provided with an annular flow channel located between the dovetail structure at the center of the injector head and the inner wall of the injector body. The cross-section of the annular flow channel gradually decreases towards the oxygen-enriched gas annular slot outlet.

[0007] As a further optimization of the present invention, the high-pressure air flow channel includes a high-pressure air inlet disposed on one side of the injector body and a high-pressure air annular seam outlet disposed on the outer side of the bottom of the injector body. The bottom of the high-pressure air inlet is connected to a high-pressure air manifold, and an annular distribution plate integrally formed in the injector body is disposed on one side of the high-pressure air manifold. The bottom inner side of the high-pressure air flow channel is provided with a high-pressure air outer flow channel.

[0008] As a further optimization of the present invention, the annular distribution plate is provided with a plurality of connection holes spaced apart, and the connection holes are used to connect the high-pressure air flow channel and the high-pressure air manifold, and the annular cross section of the bottom inner side of the high-pressure air flow channel gradually shrinks towards the high-pressure air annular seam outlet.

[0009] As a further optimization of the present invention, the high-pressure air external flow channel is provided with a plurality of air passage holes arranged in a circumferential array and connected to the air film ring cavity, and an air film hole connected to the air film ring cavity is provided on one side of the bottom of the injector body.

[0010] As a further optimization of the present invention, the fuel flow channel includes a fuel inlet located on one side of the outside of the injector body, and a fuel manifold located on the outside of the radial support beam and opened inside the injector body. The fuel manifold is connected to the fuel flow channel and is an annular cavity.

[0011] As a further optimization of the present invention, the bottom of the fuel manifold is connected to a plurality of fuel pipes arranged in a circular array. The vertical cross-section of the fuel pipes is L-shaped. The bottom of the plurality of fuel pipes is connected to fuel injection holes, and the bottom outlets of the plurality of fuel injection holes are respectively connected to an annular flow channel and a high-pressure air external flow channel.

[0012] By employing the above technical solution, the present invention provides an integrated oxygen-enriched turbine engine injector, which, compared with the prior art, has at least the following beneficial effects: 1. This invention provides an oxygen-enriched gas flow channel, a high-pressure air flow channel, and a fuel flow channel on the inner side of the injector body. The oxygen-enriched gas flow channel ejects oxygen-enriched gas at high speed, the high-pressure air flow channel ejects high-pressure air at high speed, and the fuel is evenly ejected through the fuel flow channel. This effectively achieves fuel atomization and efficient mixing of the gas, significantly improving the combustion speed and efficiency. Furthermore, the injector body is designed as an integrated unit based on 3D printing technology, eliminating the need for machining, welding, and assembly. This not only avoids the problems of large welding deformation and difficult high-temperature and high-pressure sealing design in existing injectors, but also improves the overall reliability of the injector.

[0013] 2. This invention provides an igniter holder on the injector body, allowing the injector body to be equipped with an igniter for easy use. At the same time, the fuel pipeline can cool the annular flow channel within the oxygen-rich gas flow channel. High-pressure air enters the gas film annular cavity 9 through the air hole 11 and is ejected from the gas film hole 12 at the bottom of the injector body, which can also form a gas film cooling protection for the high-pressure air flow channel, helping to extend the service life of the injector body. Attached Figure Description

[0014] 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: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] In the diagram: 1. Main body of the injector; 2. Dovetail structure at the center of the injector head; 21. Conical cavity; 22. Through hole; 23. Blunt tip; 3. Ignition socket; 4. Mounting flange one; 5. Mounting flange two; 6. Oxygen-enriched gas flow channel; 61. Oxygen-enriched gas inlet; 62. Oxygen-enriched gas annular seam outlet; 63. Annular flow channel; 7. High-pressure air flow channel; 71. High-pressure air inlet; 72. High-pressure air annular seam outlet; 73. High-pressure air manifold; 74. Annular distribution orifice plate; 75. Connecting hole; 76. High-pressure air external flow channel; 8. Fuel flow channel; 81. Fuel inlet; 82. Fuel manifold; 83. Fuel pipeline; 84. Fuel nozzle; 9. Air film annular cavity; 10. Radial support beam; 11. Air passage hole; 12. Air film hole. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0017] First Embodiment The oxygen-enriched turbine engine injector is a key component for providing efficient combustion in turbine engines. It achieves efficient combustion by injecting a high-concentration mixture of air or oxygen and fuel, and is commonly used in aerospace and some high-performance power systems. However, traditional injectors, which involve machining, welding, and assembly, suffer from problems such as large welding deformation, difficulties in designing high-temperature and high-pressure seals, and machining and assembly errors, resulting in low overall reliability. To avoid the problems of large welding deformation and difficult high-temperature and high-pressure seal design in existing injectors, a 3D-printed integrated design has been developed, eliminating the need for machining, welding, and assembly. (Refer to...) Figure 1 This embodiment provides an integrated oxygen-enriched turbine engine injector, which consists of an injector body 1, a central dovetail structure 2 of the injector head, and an igniter seat 3. The central dovetail structure 2 of the injector head is integrally formed on the inner side of the injector body 1, and the igniter seat 3 is fixed on one side of the outer wall of the injector body 1.

[0018] The upper and lower outer edges of the injector body 1 are respectively fixed with mounting flange 1 4 and mounting flange 2 5. The injector body 1 can be stably installed in the intake system of the engine combustion chamber through mounting flange 1 4 and mounting flange 2 5, so as to facilitate the installation of the injector.

[0019] To achieve efficient fuel injection atomization and gas mixing, significantly improving combustion speed and efficiency, an oxygen-enriched gas flow channel 6 is provided in the inner center of the injector body 1. A high-pressure air flow channel 7 is provided outside the oxygen-enriched gas flow channel 6, which is located within the injector body 1. The outlets of the oxygen-enriched gas flow channel 6 and the high-pressure air flow channel 7 intersect at an angle of 30-45°. A radial support beam 10 is fixedly installed through the injector body 1 to support the dovetail structure 2 at the center of the injection head, the oxygen-enriched gas flow channel 6, and the high-pressure air flow channel 7. The radial support beam 10 has a streamlined cross-sectional shape, which reduces the resistance of the support beam to the oxygen-enriched gas flow and also helps with self-support during 3D printing. The radial support beam 10 can be a single beam or multiple beams that equally divide the circumference. A fuel flow channel 8 is integrally formed inside the radial support beam 10. A circumferentially connected gas film annular cavity 9 is provided outside the high-pressure air flow channel 7, and the igniter seat 3 passes through one side of the gas film annular cavity 9.

[0020] The bottom of the dovetail structure 2 at the center of the injection head is provided with a conical cavity 21 for thermal protection of the injection head, and the cone angle at the top of the conical cavity 21 is not greater than 100°, which can provide thermal protection for the injection head. The top of the dovetail structure 2 at the center of the injection head is provided with a blunt head 23. Several through holes 22 are also provided at the bottom of the dovetail structure 2 at the center of the injection head. The through holes 22 penetrate the inner wall and outer wall of the dovetail structure 2 at the center of the injection head respectively. Under the action of the pressure difference between the oxygen-rich gas flow channel 6 and the conical cavity 21, the oxygen-rich gas passes through the through holes 22, forming a gas film protection for the conical cavity 21 inside the dovetail structure 2 at the center of the injection head.

[0021] The oxygen-enriched gas flow channel 6 includes an oxygen-enriched gas inlet 61 located at the top of the inner side of the injector body 1, and an oxygen-enriched gas annular slot outlet 62 located at the bottom of the inner side of the injector body 1. The top of the oxygen-enriched gas annular slot outlet 62 is provided with an annular flow channel 63 located between the dovetail structure 2 at the center of the injector head and the inner wall of the injector body 1. The cross-section of the annular flow channel 63 gradually decreases towards the oxygen-enriched gas annular slot outlet 62.

[0022] Oxygen-enriched gas enters the oxygen-enriched gas flow channel 6 from the oxygen-enriched gas inlet 61, and is evenly distributed to the surrounding area through the upstream blunt head 23 of the dovetail structure 2 at the center of the injection head. It is gradually accelerated through the annular flow channel 63 and is ejected at high speed from the oxygen-enriched gas annular slot outlet 62.

[0023] Second Embodiment To ensure efficient mixing of high-pressure air ejected at high speed with oxygen-rich fuel gas, refer to... Figure 1 Specifically, the high-pressure air channel 7 includes a high-pressure air inlet 71 located on one side of the injector body 1 and a high-pressure air annular slot outlet 72 located on the outer side of the bottom of the injector body 1. A high-pressure air manifold 73 is connected to the bottom of the high-pressure air inlet 71. An annular distribution perforation plate 74 integrally formed within the injector body 1 is located on one side of the high-pressure air manifold 73. A plurality of spaced connecting holes 75 are provided on the annular distribution perforation plate 74, and the connecting holes 75 are used to connect the high-pressure air channel 7 and the high-pressure air manifold. 73, and the annular cross-section of the bottom inner side of the high-pressure air flow channel 7 gradually contracts towards the high-pressure air annular slot outlet 72, so that the high-pressure air flows into the annular high-pressure air flow channel 7 with a gradually contracting cross-section after passing through the connecting hole 75, and finally is ejected at high speed from the high-pressure air annular slot outlet 72. The bottom inner side of the high-pressure air flow channel 7 is provided with a high-pressure air outer flow channel 76. The cross-section of the connecting hole 75 on the annular distribution orifice plate 74 is circular, rhomboid or raindrop, and the axis of the connecting hole 75 can be along the normal of the annular distribution orifice plate 74, or it can be at a certain angle to the annular distribution orifice plate 74.

[0024] The high-pressure air outflow channel 76 is provided with multiple circumferentially arrayed air passages 11 that are connected to the air film ring cavity 9. An air film hole 12 connected to the air film ring cavity 9 is provided on one side of the bottom of the injector body 1. High-pressure air enters the air film ring cavity 9 through the air passages 11 and is ejected from the air film hole 12 at the bottom of the injector body 1, forming an air film cooling protection for the high-pressure air outflow channel 76, which helps to extend the service life of the injector body 1.

[0025] Third Embodiment In order to ensure that the fuel is injected evenly and mixed efficiently with high-pressure air and oxygen-enriched gas, refer to Figure 1 Specifically, the fuel flow channel 8 includes a fuel inlet 81 located on one side of the injector body 1. The cross-section of the fuel flow channel 8 is circular or teardrop-shaped. A fuel manifold 82 is located outside the radial support beam 10 and opened within the injector body 1. The fuel manifold 82 is connected to the fuel flow channel 8 and is an annular cavity. The cross-section of the fuel manifold 82 can be rectangular, teardrop-shaped, or circular. The bottom of the fuel manifold 82 is connected to several circumferentially arrayed fuel pipes 83. The vertical cross-section of the fuel pipes 83 is L-shaped. The bottom of each fuel pipe 83 is connected to a fuel nozzle 84. The cross-section of the fuel nozzle 84 is teardrop-shaped or circular. The bottom outlets of the fuel nozzles 84 are connected to the annular flow channel 63 and the high-pressure air external flow channel 76, respectively. The function of the fuel pipes 83 is not only to transport fuel from the fuel manifold 82 to the fuel nozzle 84, but also to cool the annular flow channel 63 within the oxygen-enriched gas flow channel 6.

[0026] Fuel enters the fuel flow channel 8 through the fuel inlet 81, flows through the fuel manifold 82 and the fuel pipeline 83, and is then ejected from the horizontal fuel nozzle 84.

[0027] 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.

[0028] 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 variations 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. An integrated oxygen-enriched turbine engine injector, comprising a dovetail structure (2) at the center of the injector head integrally formed inside the injector body (1) and an igniter seat (3) fixed to one side of the outer wall of the injector body (1), characterized in that: An oxygen-enriched gas flow channel (6) is provided in the middle of the inner side of the injector body (1), and a high-pressure air flow channel (7) is provided in the injector body (1) on the outer side of the oxygen-enriched gas flow channel (6). The outlets of the oxygen-enriched gas flow channel (6) and the high-pressure air flow channel (7) meet at an angle of 30-45°. Among them, a radial support beam (10) for supporting the dovetail structure (2) at the center of the injection head, the oxygen-rich gas flow channel (6) and the high-pressure air flow channel (7) is fixed through the injector body (1). A fuel flow channel (8) is integrally formed inside the radial support beam (10). A circumferentially connected gas film annular cavity (9) is provided on the outside of the high-pressure air flow channel (7), and the igniter seat (3) passes through one side of the gas film annular cavity (9). The bottom of the dovetail structure (2) at the center of the injection head is provided with a conical cavity (21) for thermal protection of the injection head, and the top cone angle of the conical cavity (21) is not greater than 100°. The top of the dovetail structure (2) at the center of the injection head is provided with a blunt head (23). At the bottom of the dovetail structure (2) at the center of the injection head, there are also a number of through holes (22) spaced apart. The through holes (22) penetrate the inner wall and outer wall of the dovetail structure (2) at the center of the injection head.

2. The integrated oxygen-enriched turbine engine injector according to claim 1, characterized in that: The oxygen-enriched gas flow channel (6) includes an oxygen-enriched gas inlet (61) located at the top of the inner side of the injector body (1) and an oxygen-enriched gas annular slot outlet (62) located at the bottom of the inner side of the injector body (1). The top of the oxygen-enriched gas annular slot outlet (62) is provided with an annular flow channel (63) located between the dovetail structure (2) at the center of the injector head and the inner wall of the injector body (1). The cross-section of the annular flow channel (63) gradually decreases in the direction of the oxygen-enriched gas annular slot outlet (62).

3. The integrated oxygen-enriched turbine engine injector according to claim 2, characterized in that: The high-pressure air flow channel (7) includes a high-pressure air inlet (71) located on one side of the injector body (1) and a high-pressure air annular seam outlet (72) located on the outer side of the bottom of the injector body (1). The bottom of the high-pressure air inlet (71) is connected to a high-pressure air manifold (73). A ring-shaped distribution orifice plate (74) integrally formed in the injector body (1) is provided on one side of the high-pressure air manifold (73). A high-pressure air outer flow channel (76) is provided on the inner side of the bottom of the high-pressure air flow channel (7).

4. The integrated oxygen-enriched turbine engine injector according to claim 3, characterized in that: The annular distribution plate (74) is provided with a number of connection holes (75) spaced apart, and the connection holes (75) are used to connect the high-pressure air flow channel (7) and the high-pressure air manifold (73), and the annular cross section of the bottom inner side of the high-pressure air flow channel (7) gradually shrinks towards the high-pressure air annular slot outlet (72).

5. The integrated oxygen-enriched turbine engine injector according to claim 3, characterized in that: The high-pressure air outflow channel (76) is provided with multiple circumferentially arrayed air passages (11) that are connected to the air film ring cavity (9), and an air film hole (12) connected to the air film ring cavity (9) is provided on one side of the bottom of the injector body (1).

6. The integrated oxygen-enriched turbine engine injector according to claim 5, characterized in that: The fuel flow channel (8) includes a fuel inlet (81) located on the outside of the injector body (1) and a fuel manifold (82) located on the outside of the radial support beam (10) and opened inside the injector body (1). The fuel manifold (82) is connected to the fuel flow channel (8) and is an annular cavity.

7. The integrated oxygen-enriched turbine engine injector according to claim 6, characterized in that: The bottom of the fuel manifold (82) is connected to a number of fuel pipes (83) arranged in a circular array. The vertical cross section of the fuel pipes (83) is L-shaped. The bottom of the fuel pipes (83) is connected to fuel nozzles (84), and the bottom outlets of the fuel nozzles (84) are connected to the annular flow channel (63) and the high-pressure air external flow channel (76).

8. The integrated oxygen-enriched turbine engine injector according to claim 1, characterized in that: The upper and lower outer edges of the injector body (1) are respectively fixed with mounting flange one (4) and mounting flange two (5).

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