Flame tube for aero-engine combustion chamber
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-24
AI Technical Summary
The existing combustion chamber flame tubes of aircraft engines are connected by welding during installation, which makes disassembly and maintenance difficult, increases maintenance costs, and reduces reliability.
The design employs threaded fasteners and two layers of sealing rings to change the connection between the flame tube head and the tube body, as well as the connection between the gas conduit and the tube body, to a threaded fastening connection. Sealing rings are added at key connection points to ensure the stability of the connection and ease of disassembly.
It improves the overall structural stability and sealing performance of the flame tube, reduces the difficulty of installation and maintenance, extends the service life, and ensures long-term stable operation.
Smart Images
Figure CN224033858U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to aviation technology field, concretely is a kind of flame tube for aero-engine combustion chamber. BACKGROUND
[0002] The flame tube of aero-engine combustion chamber is the main component of combustion chamber, responsible for organizing combustion, and the main function of the flame tube as a key component of aero-engine combustion chamber is to provide a stable combustion environment to ensure that fuel and air can be mixed efficiently and continuously burned. It is usually a large-sized thin-walled part with a thin thickness but a large diameter to adapt to the working environment of high temperature and high pressure.
[0003] However, the existing flame tube for aero-engine combustion chamber has some problems when in use:
[0004] During installation, the existing flame tube for aero-engine combustion chamber is usually assembled by welding the head and the barrel of the flame tube. Although the welding method can ensure the stability of the connection between the head and the barrel of the flame tube, it is not convenient to disassemble them when maintenance and replacement are required, which leads to high maintenance difficulty and further increases maintenance cost, reducing the use reliability.
[0005] Therefore, we propose a flame tube for aero-engine combustion chamber to solve the problems mentioned above. SUMMARY
[0006] The utility model aims at providing a flame tube for aero-engine combustion chamber to solve the problem that the existing flame tube for aero-engine combustion chamber is usually assembled by welding the head and the barrel of the flame tube during installation. Although the welding method can ensure the stability of the connection between the head and the barrel of the flame tube, it is not convenient to disassemble them when maintenance and replacement are required, which leads to high maintenance difficulty and further increases maintenance cost, reducing the use reliability.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a flame tube for aero-engine combustion chamber, comprising a flame tube head and a cooling part:
[0008] One side of the flame tube head is welded with a cooling part, one side of the cooling part is annularly provided with a plurality of cooling small holes, the other side of the cooling part is welded with a first inner sealing ring at the inner circle, the other side of the cooling part is welded with a first outer sealing ring at the outer circle, the outer surface of the first outer sealing ring is provided with a first embedding groove, and four groups of first fixing plates are welded at the outer end of the first embedding groove, and a first threaded hole is formed in the middle of the first fixing plate.
[0009] The technical scheme is adopted, the cooling part with multiple groups of cooling small holes is designed at the head of the flame tube, the cooling air can form an air film through the cooling small holes, the flame tube wall is cooled, the temperature of the flame tube wall is reduced, the flame tube can withstand the impact of high-temperature and high-pressure airflow, and the service life of the flame tube is prolonged.
[0010] Preferably, one side of the cooling part is provided with a cylinder body, the outer edge of the cylinder body is matched with the gap between the first inner sealing ring and the first outer sealing ring, and six groups of air inlet holes are annularly arranged on the outer surface of the cylinder body.
[0011] The technical scheme is adopted, the cylinder body is embedded between the first inner sealing ring and the first outer sealing ring, a sealing structure is added between the cylinder body and the cooling part, gas leakage is effectively prevented, and the sealing performance of the entire cooling part is ensured.
[0012] Preferably, four first connecting plates are welded on the outer edge of the cylinder body, the first connecting plates are in corresponding sliding connection with the first embedding grooves, first fasteners are penetrated through the middle part of the first connecting plates, and the first connecting plates are in threaded fastening connection with the first fixed plates through the first fasteners and the first threaded holes.
[0013] The technical scheme is adopted, the cylinder body and the first outer sealing ring are correspondingly connected with the first connecting plates and the first fixed plates, and the two are in threaded fastening connection through the first fasteners, so that the connection between the cylinder body and the cooling part is not only firm and reliable, but also convenient to disassemble and maintain, and the maintenance requirements of the head of the flame tube and the cylinder body are met.
[0014] Preferably, a second inner sealing ring is welded at the inner ring of the other end of the cylinder body, a second outer sealing ring is welded at the outer ring of the other end of the cylinder body, and four second embedding grooves are arranged on the outer surface of the second outer sealing ring.
[0015] The technical scheme is adopted, the second inner sealing ring and the second outer sealing ring are designed at the other end of the cylinder body, the connection strength of the rear end of the cylinder body is increased, and the overall structural stability of the flame tube is improved.
[0016] Preferably, a second fixed plate is welded on the outer surface of the second outer sealing ring, a second threaded hole is arranged in the middle part of the second fixed plate, a gas guide pipe is arranged on one side of the cylinder body, and the outer edge of the gas guide pipe is in abutting connection with the gap between the second inner sealing ring and the second outer sealing ring.
[0017] The technical scheme is adopted, the gas guide pipe is embedded between the two layers of sealing rings, the tightness of the connection is increased to a certain extent, and effective sealing effect is added to the connection between the gas guide pipe and the cylinder body.
[0018] Preferably, the outer surface of the gas guide pipe is welded with four groups of second connecting plates, and the second connecting plates are correspondingly connected with the second embedding grooves, the middle part of the second connecting plate is penetrated by a second fastener, and the second connecting plate is threadedly fastened with the second fixed plate through the second fastener and the second threaded hole.
[0019] By using the above technical scheme, after the gas guide pipe is embedded between the two layers of sealing rings, the corresponding connection of the second connecting plate and the second embedding groove is used to realize the accurate positioning of the installation of the gas guide pipe, so as to prevent the installation deviation, and then the second connecting plate and the second fixed plate are installed and fixed through the second fastener, which is more convenient and fast during installation and disassembly, and helps to reduce the installation cost and maintenance difficulty, facilitates the regular inspection and maintenance of the gas guide pipe and the connecting parts, and ensures the long-term stable operation.
[0020] Compared with the prior art, the utility model has the advantages that:
[0021] 1. The connection between the cooling part of the flame tube, the cylinder and the gas guide pipe is threadedly fastened through the fastener, and two layers of sealing rings are used, so that the stability of the overall structure of the flame tube is increased, the connection between the three is facilitated through the fastener, the installation and disassembly of the three are facilitated, the subsequent maintenance and repair are facilitated, the installation and maintenance are facilitated, the use of the flame tube is ensured, and the service life of the flame tube is prolonged.
[0022] 2. Two layers of sealing rings are added at the connection between the cooling part of the flame tube and the cylinder and the cylinder and the gas guide pipe, the sealing rings can increase the tightness of the connection between the cylinder and the cooling part and the gas guide pipe and the cylinder, provide certain sealing performance for the composition of the flame tube, effectively prevent gas leakage, improve the sealing performance of the flame tube, ensure the long-term stable operation of the flame tube, prolong the service life of the flame tube, and improve the use efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a front view of the structure of the utility model;
[0024] Figure 2 It is a sectional view of the main body of the utility model;
[0025] Figure 3 It is a connection structure diagram of the cylinder and the cooling part of the utility model;
[0026] Figure 4 It is a connection structure diagram of the gas guide pipe and the cylinder of the utility model; Figure 3 It is an enlarged structure diagram of position A of the utility model;
[0027] Figure 5 It is a connection structure diagram of the gas guide pipe and the cylinder of the utility model;
[0028] Figure 6 The utility model discloses Figure 5 Amplification structural diagram of middle B place.
[0029] In the figure: 1, flame tube head; 2, cooling part; 3, cooling small hole; 4, first inner sealing ring; 5, first outer sealing ring; 6, first embedding groove; 7, first fixed plate; 8, first threaded hole; 9, barrel; 10, air inlet hole; 11, first connecting plate; 12, first fastener; 13, second inner sealing ring; 14, second outer sealing ring; 15, second embedding groove; 16, second fixed plate; 17, second threaded hole; 18, gas guide pipe; 19, second connecting plate; 20, second fastener. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.
[0031] In order to solve the problem that the flame tube head and the barrel are inconvenient to disassemble in the prior art, leading to high maintenance difficulty, the following scheme is disclosed, please refer to Figures 1-6 The utility model provides a kind of technical solutions: a kind of flame tube for aero-engine combustion chamber, including flame tube head 1 and cooling part 2: flame tube head 1 side is welded with cooling part 2, and the one side of cooling part 2 is annularly provided with multiple groups of cooling small holes 3, and the other side inner circle of cooling part 2 is welded with first inner sealing ring 4, and the other side outer circle of cooling part 2 is welded with first outer sealing ring 5, and the outer surface of first outer sealing ring 5 is provided with first embedding groove 6, and first embedding groove 6 is evenly distributed with four groups, and the outer end of first embedding groove 6 is welded with four groups of first fixed plate 7, and the middle part of first fixed plate 7 is provided with first threaded hole 8;Cooling part 2 side is provided with barrel 9, and the clearance of the outer edge of barrel 9 and first inner sealing ring 4 and first outer sealing ring 5 is compatible, and the outer surface of barrel 9 is annularly provided with six groups of air inlet hole 10;The outer edge of barrel 9 is welded with four groups of first connecting plate 11, and first connecting plate 11 is slidably connected with first embedding groove 6 in correspondence, and the middle part of first connecting plate 11 is penetrated with first fastener 12, and first connecting plate 11 is threadedly fastened with first fixed plate 7 by first fastener 12 and first threaded hole 8.
[0032] The cooling part 2 is welded on one side of the flame tube head 1, and a plurality of groups of cooling holes 3 are uniformly arranged on the outer surface of the cooling part 2. Air enters the inside of the flame tube head 1 through the cooling holes 3, and a gas film is formed to cool the wall of the flame tube, so that the temperature of the wall of the flame tube is reduced, the impact of high-temperature and high-pressure gas flow can be resisted, and the service life of the flame tube is prolonged. A first inner sealing ring 4 and a first outer sealing ring 5 are designed on one side of the cooling part 2. The cylinder body 9 is inserted between the two sealing rings through a first embedding groove 6 corresponding to the outer surface of the first outer sealing ring 5 on the first connecting plate 11. The first fastener 12 is threaded through and screwed to the first connecting plate 11 and the first fixed plate 7, so that the cylinder body 9 and the cooling part 2 are tightly connected. Through the two sealing rings, an effective sealing structure is formed between the cylinder body 9 and the cooling part 2, which can effectively prevent gas leakage and improve the sealing performance of the flame tube. In addition, the cylinder body 9 is connected to the cooling part 2 through the first fastener 12, so that the connection between the two is tight and stable, and the adjustment and positioning during installation and disassembly are facilitated, which facilitates later maintenance and repair, reduces installation cost and maintenance difficulty, increases use convenience, improves use efficiency, and prolongs the service life of the flame tube.
[0033] The second inner sealing ring 13 is welded on the inner ring of the other end of the cylinder body 9, the second outer sealing ring 14 is welded on the outer ring of the other end of the cylinder body 9, and four second embedding grooves 15 are arranged on the outer surface of the second outer sealing ring 14. The second fixed plate 16 is welded on the outer surface of the second outer sealing ring 14, the second threaded hole 17 is arranged in the middle of the second fixed plate 16, the gas guide pipe 18 is arranged on one side of the cylinder body 9, and the outer edge of the gas guide pipe 18 is connected to the gap between the second inner sealing ring 13 and the second outer sealing ring 14. Four second connecting plates 19 are welded on the outer surface of the gas guide pipe 18, and the second connecting plates 19 are connected to the second embedding grooves 15. The second fastener 20 is arranged in the middle of the second connecting plate 19, and the second connecting plate 19 is screwed to the second fixed plate 16 through the second fastener 20 and the second threaded hole 17.
[0034] The second connecting plate 19 of the outer surface of the gas guide pipe 18 is provided with the second embedding groove 15 corresponding to the outer surface of the second outer sealing ring 14, so that the outer edge of the gas guide pipe 18 is embedded between the two groups of sealing rings, and the second connecting plate 19 of the outer surface of the gas guide pipe 18 corresponds to the second fixed plate 16 of the outer surface of the second outer sealing ring 14, and then the second fastener 20 penetrates the second connecting plate 19 and is threadedly connected with the second fixed plate 16, so that the stability of the connection between the gas guide pipe 18 and the cylinder 9 is increased, and the threaded connection facilitates the disassembly and installation of the two, facilitates the subsequent maintenance and repair, reduces the maintenance cost, and increases the disassembly convenience. The second inner sealing ring 13 and the second outer sealing ring 14 can increase the sealing performance between the gas guide pipe 18 and the cylinder 9, effectively prevent gas leakage, further increase the overall performance, improve the sealing performance of the overall structure, ensure the long-term stable operation of the flame tube, and prolong the service life of the flame tube.
[0035] Working principle: for this kind of flame tube for the combustion chamber of the aircraft engine, first, the outer surface of the cooling part 2 of the flame tube head 1 is uniformly provided with a plurality of cooling small holes 3, air enters the inside of the flame tube head 1 through the cooling small holes 3, and a layer of gas film is formed, which can cool the flame tube wall and reduce the temperature of the flame tube wall, so that it can withstand the impact of high-temperature and high-pressure gas flow, thereby prolonging the service life of the flame tube. Secondly, the first inner sealing ring 4 and the first outer sealing ring 5 are designed on one side of the cooling part 2, the cylinder 9 is embedded between the two layers of sealing rings through the first connecting plate 11 corresponding to the first embedding groove 6 on the outer surface of the first outer sealing ring 5, and then the first fastener 12 is penetrated and threadedly connected to the first connecting plate 11 and the first fixed plate 7, so that the cylinder 9 is tightly connected with the cooling part 2. Not only increases the effective sealing structure, but also effectively prevents gas leakage and improves the sealing performance of the flame tube. In addition, the cylinder 9 is connected with the cooling part 2 through the first fastener 12. This connection method not only makes the connection of the two compact and stable, but also facilitates the later maintenance and repair, reduces the installation cost and maintenance difficulty, and increases the use convenience. Finally, the second inner sealing ring 13 and the second outer sealing ring 14 are designed on the other end of the cylinder 9, the second connecting plate 19 of the outer surface of the gas guide pipe 18 is provided with the second embedding groove 15 corresponding to the outer surface of the second outer sealing ring 14, so that the outer edge of the gas guide pipe 18 is embedded between the two groups of sealing rings, and then the second fastener 20 penetrates the second connecting plate 19 and is threadedly connected with the second fixed plate 16, which increases the stability of the connection between the gas guide pipe 18 and the cylinder 9, facilitates the disassembly and installation of the two, facilitates the subsequent maintenance and repair, reduces the maintenance cost, and increases the disassembly convenience, thereby ensuring the long-term stable operation of the flame tube.
[0036] Thus, a series of work is completed, the content which is not described in detail in the specification belongs to the prior art known to the person skilled in the art.
[0037] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A flame tube for an aero-engine combustion chamber, comprising a flame tube head (1) and a cooling part (2), characterized in that: One side of the flame tube head (1) is welded with the cooling part (2), a plurality of groups of cooling holes (3) are annularly arranged on one side of the cooling part (2), a first inner sealing ring (4) is welded on the inner circle of the other side of the cooling part (2), a first outer sealing ring (5) is welded on the outer circle of the other side of the cooling part (2), a first embedding groove (6) is arranged on the outer surface of the first outer sealing ring (5), and four groups of the first embedding groove (6) are uniformly distributed, four groups of first fixing plates (7) are welded on the outer end of the first embedding groove (6), and a first threaded hole (8) is arranged in the middle of the first fixing plate (7).
2. A flame tube for a combustion chamber of an aeroengine according to claim 1, characterized in that: A cylinder (9) is arranged on one side of the cooling part (2), and the outer edge of the cylinder (9) is matched with the gap between the first inner sealing ring (4) and the first outer sealing ring (5), and six groups of air inlet holes (10) are annularly arranged on the outer surface of the cylinder (9).
3. A flame tube for a combustion chamber of an aeroengine according to claim 2, characterized in that: Four groups of first connecting plates (11) are welded on the outer edge of the cylinder (9), and the first connecting plates (11) are in corresponding sliding connection with the first embedding groove (6), a first fastener (12) penetrates the middle of the first connecting plate (11), and the first connecting plate (11) is in threaded fastening connection with the first fixing plate (7) through the first fastener (12) and the first threaded hole (8).
4. A flame tube for a combustion chamber of an aeroengine according to claim 3, characterized in that: A second inner sealing ring (13) is welded on the inner circle of the other end of the cylinder (9), a second outer sealing ring (14) is welded on the outer circle of the other end of the cylinder (9), and four groups of second embedding grooves (15) are arranged on the outer surface of the second outer sealing ring (14).
5. A flame tube for a combustion chamber of an aeroengine according to claim 4, characterized in that: A second fixing plate (16) is welded on the outer surface of the second outer sealing ring (14), a second threaded hole (17) is arranged in the middle of the second fixing plate (16), a gas guide pipe (18) is arranged on one side of the cylinder (9), and the outer edge of the gas guide pipe (18) is in close connection with the gap between the second inner sealing ring (13) and the second outer sealing ring (14).
6. A flame tube for a combustion chamber of an aeroengine according to claim 5, characterized in that: Four groups of second connecting plates (19) are welded on the outer surface of the gas guide pipe (18), and the second connecting plates (19) are in corresponding close connection with the second embedding grooves (15), a second fastener (20) penetrates the middle of the second connecting plate (19), and the second connecting plate (19) is in threaded fastening connection with the second fixing plate (16) through the second fastener (20) and the second threaded hole (17).