Combustion chamber ignition electric nozzle anti-rotation device, combustion chamber and aero-engine

Abstract

The utility model provides a combustion chamber ignition electric nozzle anti-rotation device, a combustion chamber and an aero-engine, the anti-rotation device comprises a mounting seat, a cover plate and a floating sleeve, the mounting seat is mounted on the outer wall of a flame tube; the cover plate is arranged at the end, away from the flame tube, of the mounting base in a covering mode, the mounting base and the cover plate are matched to form a containing cavity, and at least one limiting groove connected with the containing cavity is formed in the peripheral side wall of the cover plate and / or the peripheral side wall of the mounting base; one end of the floating sleeve ignition electric nozzle penetrates through the floating sleeve and extends to the inner cavity of the flame tube, one end of the floating sleeve is installed in the containing cavity, a stop rod is arranged on the floating sleeve, and one end of the stop rod extends and is clamped in the limiting groove. According to the anti-rotation device for the ignition electric nozzle of the combustion chamber, the floating sleeve can be prevented from rotating, so that friction between the floating sleeve and other parts is reduced, and the service life of the floating sleeve and the service life of the ignition electric nozzle are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation engines, in particular to a combustion chamber ignition nozzle anti-rotation device, a combustion chamber and an aviation engine. Background Art

[0002] In an aircraft engine, the combustion chamber is the area where combustion is organized. The compressed air from the compressor enters the combustion chamber and mixes with the fuel gas ejected from the fuel nozzle and then burns to produce high-temperature fuel gas, which drives the turbine to do work and generate thrust.

[0003] In the combustion chamber, the flame tube is the combustion area, and the combustion chamber casing is the main load-bearing structure. The flame tube, nozzle, ignition nozzle, bore plug and other components are fixed by being installed on the casing, and there is also an assembly relationship between them.

[0004] Among them, the ignition nozzle or boresight plug is inserted into the flame tube radially by being installed on the casing. Therefore, the misalignment deviation caused by the assembly dimension chain and thermal deformation of the flame tube and the casing will affect the assembly of the ignition nozzle and the boresight plug.

[0005] The floating structure is used to realize assembly floating and thermal deformation floating effects. The end of the ignition nozzle extends into the wall of the flame tube and contacts the flame, and needs to be cooled. Therefore, it is necessary to open cooling holes and other features on the floating structure.

[0006] The floating mechanism includes a floating sleeve. Generally, a rotating hole is opened on the floating sleeve structure to improve the cooling effect. However, the floating sleeve with a rotational cooling hole often rotates due to the reverse force during actual use, which affects the cooling effect of the ignition nozzle and also accelerates the wear of the floating sleeve, thereby reducing the service life of the ignition nozzle.

[0007] Based on this, the author of the present application proposes a combustion chamber ignition nozzle anti-rotation device, a combustion chamber and an aircraft engine, in order to solve the above-mentioned technical problems. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the defects of the prior art that the floating sleeve is worn under the action of the reverse force and affects the cooling effect of the ignition nozzle, and to provide a combustion chamber ignition nozzle anti-rotation device, a combustion chamber and an aircraft engine.

[0009] The utility model solves the above technical problems through the following technical solutions:

[0010] The utility model provides a combustion chamber ignition nozzle anti-rotation device, which is characterized by comprising:

[0011] A mounting seat, mounted on the outer wall of the flame tube;

[0012] A cover plate is arranged on an end of the mounting seat away from the flame tube, the mounting seat and the cover plate cooperate to form an accommodating chamber, and at least one limiting groove connected to the accommodating chamber is formed on the peripheral side wall of the cover plate and / or the mounting seat;

[0013] A floating sleeve, one end of the ignition nozzle is passed through the floating sleeve and extends to the inner cavity of the flame tube, one end of the floating sleeve is installed in the accommodating chamber, and a stop rod is provided on the floating sleeve, one end of the stop rod extends and is clamped in the limiting groove.

[0014] According to an embodiment of the utility model, the mounting seat is provided with a first matching hole matched with the ignition nozzle and has a mounting end and a connecting end, the mounting end is fixedly arranged on the outer wall of the flame tube, and the connecting end is clamped in the first mounting hole of the flame tube for mounting the ignition nozzle;

[0015] The limiting groove is arranged on the top surface of the mounting seat, and the bottom surface of the cover plate is arranged to cover the top notch of the limiting groove.

[0016] According to an embodiment of the present utility model, the number of the limiting grooves is two, and they are respectively arranged on two opposite sides of the mounting seat;

[0017] A stop rod is disposed at each of the two opposite ends of the floating sleeve, and one end of the stop rod is inserted into the limiting groove to prevent the floating sleeve from rotating relative to the mounting seat.

[0018] According to an embodiment of the utility model, the mounting seat and the cover plate are fixedly connected by spot welding.

[0019] According to an embodiment of the utility model, a second matching hole matching with the ignition nozzle is formed on the cover plate, and one end of the floating sleeve is passed through the second matching hole and extends in a direction away from the mounting seat.

[0020] According to an embodiment of the utility model, the floating sleeve includes a mounting body and a protruding body, the stop rod is mounted on the mounting body, and the mounting body is disposed in the accommodating chamber;

[0021] The protruding body protrudes out of the second matching hole and is arranged in a flared shape.

[0022] According to an embodiment of the utility model, a plurality of cooling holes are opened on the mounting body, and the cooling holes are respectively connected with the outer duct and the inner cavity of the flame tube.

[0023] According to an embodiment of the present invention, a plurality of cooling holes are evenly spaced and arranged circumferentially at a connection position between the protruding body and the mounting body.

[0024] The utility model also provides a combustion chamber ignition nozzle anti-rotation device, which is characterized in that it comprises an ignition nozzle, a flame tube and the combustion chamber ignition nozzle anti-rotation device as described above.

[0025] The utility model also provides an aeroengine, comprising the combustion chamber as described above.

[0026] The positive and progressive effects of the utility model are:

[0027] The utility model discloses a combustion chamber ignition nozzle anti-rotation device, which is composed of a mounting seat, a cover plate and a floating sleeve. The floating sleeve is provided with a stop rod, which is clamped in a limit groove to limit the position of the floating sleeve, so that the floating sleeve itself can be prevented from rotating, thereby reducing the friction between the floating sleeve and other parts, and prolonging the service life of the floating sleeve and the ignition nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0029] Figure 1 It is a structural schematic diagram of the combustion chamber of the utility model;

[0030] Figure 2 This is a cross-sectional view of the installation structure of the combustion chamber ignition nozzle anti-rotation device of the utility model;

[0031] Figure 3 This is an axonometric view of the combustion chamber ignition nozzle anti-rotation device of the utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the floating sleeve of the utility model;

[0033] Figure 5 This is a structural schematic diagram of the mounting seat of the utility model at one angle;

[0034] Figure 6 This is a schematic structural diagram of the mounting base of the utility model from another angle.

[0035] 1. Mounting seat; 11. Limiting groove; 12. First matching hole; 13. Mounting end; 14. Connecting end;

[0036] 2. Flame tube; 21. First mounting hole;

[0037] 3. Cover plate; 31. Accommodating chamber; 32. Second matching hole;

[0038] 4. floating sleeve; 41. stop rod; 42. mounting body; 421. cooling hole; 43. extension body;

[0039] 5. Ignition nozzle;

[0040] 6. Receiver. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] Please refer to Figures 1 to 6 The utility model provides a combustion chamber ignition nozzle anti-rotation device, comprising a mounting seat 1, a cover plate 3 and a floating sleeve 4, wherein the mounting seat 1 is mounted on the outer wall of a flame tube 2.

[0044] The inner cavity of the flame tube 2 is an inner duct, the outer wall of the flame tube 2 and the casing 6 are an outer duct, and the mounting seat 1 is installed in the outer duct and on the outer wall of the flame tube 2.

[0045] The cover plate 3 is arranged on the end of the mounting seat 1 away from the flame tube 2, and a receiving chamber 31 is formed between the mounting seat 1 and the cover plate 3. At least one limiting groove 11 connected to the receiving chamber 31 is formed on the side wall of the cover plate 3 and / or the mounting seat 1.

[0046] The limiting groove 11 can be arranged on the cover plate 3 alone, or can be arranged on the mounting seat 1 alone; it can also be arranged on the cover plate 3 in part, and on the mounting seat 1 in another part. When the cover plate 3 and the mounting seat 1 are matched, the limiting groove 11 is formed. The setting position and formation method of the limiting groove 11 are not limited here.

[0047] Please refer to Figure 1 and Figure 2 One end of the ignition nozzle 5 is inserted into the floating sleeve 4 and extends to the inner cavity of the flame tube 2. One end of the floating sleeve 4 is installed in the accommodating chamber 31. A stop rod 41 is provided on the floating sleeve 4. One end of the stop rod 41 extends and is clamped in the limiting groove 11.

[0048] The floating sleeve 4 can not only play the role of assembly floating and thermal deformation floating, but also is provided with a stop rod 41, which can be inserted into the limit groove 11. Under the cooperation of the stop rod 41 and the cover plate 3 and / or the mounting seat 1, the floating sleeve 4 itself will not rotate, thereby playing a role of stopping rotation, reducing the friction between the floating sleeve 4 and other parts, and improving the service life of the floating sleeve 4 and the service life of the ignition nozzle 5.

[0049] Please refer to Figures 3 to 6 The mounting seat 1 is provided with a first matching hole 12 that matches the ignition nozzle 5 and has a mounting end 13 and a connecting end 14. The mounting end 13 is fixed to the outer wall of the flame tube 2, and the connecting end 14 is clamped in the first mounting hole 21 of the flame tube 2 for mounting the ignition nozzle 5. The limiting groove 11 is opened on the top surface of the mounting seat 1, and the bottom surface of the cover plate 3 is covered at the top notch of the limiting groove 11.

[0050] That is, a first mounting hole 21 is provided on the flame tube 2 , and the first mounting hole 21 is used for mounting the ignition nozzle 5 , so that the ignition nozzle 5 can ignite the gas in the flame tube 2 after being mounted.

[0051] In one embodiment, the limit groove 11 is opened on one end surface of the mounting seat 1 facing the cover plate 3, and is designed to be open at one end facing the cover plate 3. After the cover plate 3 and the mounting seat 1 are matched, the top of the limit groove 11 is limited and sealed. At this time, the stop rod 41 of the floating sleeve 4 is clamped in the limit groove 11, and the floating sleeve 4 can be stopped from rotating under the cooperation of the cover plate 3 and the mounting seat 1.

[0052] In some other embodiments, the limiting groove 11 can also be opened on one end surface of the cover plate 3 facing the mounting seat 1. The cover plate 3 and the mounting seat 1 can cooperate to limit the stop rod 41 and thus stop the floating sleeve 4 from rotating.

[0053] Optionally, there are two limit grooves 11, which are arranged on opposite sides of the mounting seat 1. A stop rod 41 is provided at each opposite end of the floating sleeve 4. One end of the stop rod 41 is inserted into the limit groove 11 to prevent the floating sleeve 4 from rotating relative to the mounting seat 1.

[0054] The number of the stop rods 41 is consistent with the number of the limiting grooves 11 . To improve the anti-rotation effect of the floating sleeve 4 , a plurality of stop rods 41 may be evenly arranged along the circumference of the floating sleeve 4 .

[0055] Correspondingly, a corresponding number of limiting grooves 11 are also provided along the circumference of the mounting seat 1 to cooperate therewith, and the specific number is not limited here.

[0056] In one embodiment, the mounting base 1 and the cover plate 3 are fixedly connected by spot welding.

[0057] For example, argon arc welding is used to perform spot welding at multiple positions along the circumference of the mounting position of the mounting seat 1 and the cover plate 3, thereby ensuring the stability of the floating sleeve 4 during use.

[0058] Moreover, when the floating sleeve 4 needs to be disassembled and replaced by spot welding, the welding spots can be polished and removed, so that the disassembly is convenient.

[0059] In one embodiment, the cover plate 3 is provided with a second matching hole 32 matched with the ignition nozzle 5 , and one end of the floating sleeve 4 is passed through the second matching hole 32 and extends in a direction away from the mounting seat 1 .

[0060] The second matching hole 32 corresponds to the first matching hole 12 , and both are for avoiding the installation path of the ignition nozzle.

[0061] Specifically, the floating sleeve 4 includes a mounting body 42 and a protruding body 43 . The stop rod 41 is mounted on the mounting body 42 . The mounting body 42 is disposed in the accommodating chamber 31 . The protruding body 43 protrudes from the second matching hole 32 and is expanded.

[0062] A gap is set between the mounting body 42, the cover plate 3 and the mounting seat 1, so as to adapt to assembly floating and thermal deformation floating. The floating sleeve 4 can float freely, so that it is convenient to install the ignition nozzle 5, and the mounting seat 1 and the cover plate 3 will not be damaged when the floating sleeve 4 is disassembled. Therefore, it is convenient to disassemble and assemble the floating sleeve 4, and it can also save the cost of replacing parts.

[0063] The extension 43 is flared, on the one hand, to guide the installation of the ignition nozzle 5, and on the other hand, to form a guide flow channel between the cover plate 3 and the cover plate 3, thereby absorbing more gas from the outer channel to flow to the ignition nozzle 5, so as to cool the part of the ignition nozzle 5 close to the combustion chamber.

[0064] Please continue to refer to Figure 2 and Figure 3 A plurality of cooling holes 421 are provided on the mounting body 42 , and the cooling holes 421 are respectively connected to the outer duct and the inner cavity of the flame tube 2 .

[0065] That is, the provision of the cooling holes 421 can increase the amount of low-temperature gas from the outer duct to the flame tube 2 , thereby improving the cooling effect of the ignition nozzle 5 .

[0066] Preferably, the plurality of cooling holes 421 are evenly spaced and arranged circumferentially at the connection position between the extension body 43 and the mounting body 42 .

[0067] That is, the low-temperature gas in the outer duct can flow to the first mounting hole 21 through the cooling hole 421 and continuously cool the end of the ignition nozzle 5 at the first mounting hole 21 close to the flame tube 2.

[0068] The utility model also provides a combustion chamber, which includes an ignition nozzle 5, a flame tube 2 and an anti-collision device for the ignition nozzle 5 of the combustion chamber, so as to improve the combustion reliability and stability of the combustion chamber.

[0069] The compressed air flow of the compressor is decelerated and expanded through the diffuser, and then enters the flame tube 2 to mix with the fuel sprayed from the fuel nozzle. The high-energy electric spark generated by the ignition nozzle 5 ignites the oil-gas mixture, thereby achieving combustion.

[0070] The utility model also provides an aero-engine, comprising the above-mentioned combustion chamber, thereby improving the working reliability and stability of the aero-engine.

[0071] The working principle of an aircraft engine is that the boost stage and the high-pressure compressor compress the air, which is then burned in the combustion chamber and works on the high-pressure turbine and the low-pressure turbine, converting the chemical energy of the fuel into mechanical energy of the turbine. The turbine discharges the combustion gas and drives the fan to generate thrust.

[0072] In summary, the combustion chamber ignition nozzle anti-rotation device of the utility model is composed of a mounting seat 1, a cover plate 3 and a floating sleeve 4. A stop rod 41 is provided on the floating sleeve 4. The stop rod 41 is clamped in the limit groove 11 to limit the position of the floating sleeve 4, so that the floating sleeve 4 itself can be prevented from rotating, thereby reducing the friction between the floating sleeve 4 and other parts, and improving the service life of the floating sleeve 4 and the service life of the ignition nozzle 5.

[0073] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "connect", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0074] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0075] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope defined by the claims of the utility model.

Claims

1. A combustion chamber ignition nozzle anti-rotation device, characterized in that: include: A mounting seat, mounted on the outer wall of the flame tube; A cover plate is arranged on an end of the mounting seat away from the flame tube, the mounting seat and the cover plate cooperate to form an accommodating chamber, and at least one limiting groove connected to the accommodating chamber is formed on the peripheral side wall of the cover plate and / or the mounting seat; A floating sleeve, one end of the ignition nozzle is passed through the floating sleeve and extends to the inner cavity of the flame tube, one end of the floating sleeve is installed in the accommodating chamber, and a stop rod is provided on the floating sleeve, one end of the stop rod extends and is clamped in the limiting groove.

2. The combustion chamber ignition nozzle anti-rotation device according to claim 1, characterized in that: The mounting seat is provided with a first matching hole matched with the ignition nozzle and has a mounting end and a connecting end, the mounting end is fixedly arranged on the outer wall of the flame tube, and the connecting end is clamped in the first mounting hole of the flame tube for mounting the ignition nozzle; The limiting groove is arranged on the top surface of the mounting seat, and the bottom surface of the cover plate is arranged to cover the top notch of the limiting groove.

3. The combustion chamber ignition nozzle anti-rotation device according to claim 2, characterized in that: The number of the limiting grooves is two, and they are arranged on two opposite sides of the mounting seat; A stop rod is disposed at each of the two opposite ends of the floating sleeve, and one end of the stop rod is inserted into the limiting groove to prevent the floating sleeve from rotating relative to the mounting seat.

4. The combustion chamber ignition nozzle anti-rotation device according to claim 1, characterized in that: The mounting seat and the cover plate are fixedly connected by spot welding.

5. The combustion chamber ignition nozzle anti-rotation device according to claim 1, characterized in that: The cover plate is provided with a second matching hole matched with the ignition nozzle, and one end of the floating sleeve is passed through the second matching hole and extends in a direction away from the mounting seat.

6. The combustion chamber ignition nozzle anti-rotation device according to claim 5, characterized in that: The floating sleeve comprises a mounting body and a protruding body, the stop rod is mounted on the mounting body, and the mounting body is arranged in the accommodating chamber; The protruding body protrudes out of the second matching hole and is arranged in a flared shape.

7. The combustion chamber ignition nozzle anti-rotation device according to claim 6, characterized in that: The mounting body is provided with a plurality of cooling holes, and the cooling holes are respectively connected with the outer duct and the inner cavity of the flame tube.

8. The combustion chamber ignition nozzle anti-rotation device according to claim 7, characterized in that: The plurality of cooling holes are evenly spaced and arranged at a circumference at a connection position between the protruding body and the mounting body.

9. A combustion chamber, characterized in that: include: An ignition nozzle, a flame tube, and a combustion chamber ignition nozzle anti-rotation device as described in any one of claims 1 to 8.

10. An aircraft engine, characterized in that: Comprising a combustion chamber as claimed in claim 9.

Images