CN117366625A - Flame tube outer ring, combustion chamber, mounting structure and method - Google Patents

Abstract

The invention provides a flame tube outer ring, a combustion chamber, a mounting structure and a method. Wherein, mounting structure is used for installing point thermal power mouth in the flame tube outer loop, includes: a bushing including an extension and a mounting portion for passing through the mounting point thermal nozzle; the positioning ring comprises a first end and a second end, and the first end and the second end define a notch of the positioning ring; the shell is used for being integrally arranged with the outer ring of the flame tube and comprises a first part and a second part which are axially connected, wherein the first part is used for providing a first accommodating space for accommodating the ignition electrode tip, and the second part is used for providing a second accommodating space for accommodating the bushing and the positioning ring; the positioning ring is sleeved on the mounting part of the bushing, the second ring and the extending part of the bushing are positioned on two axial sides of the positioning ring, and the second ring limits the positioning ring and the extending part of the bushing in the second accommodating space.

Description

Flame tube outer ring, combustion chamber, mounting structure and method

Technical Field

The invention relates to the field of aero-engine combustion chambers, in particular to a flame tube outer ring, a combustion chamber, a mounting structure and a method.

Background

The aeroengine work is mainly that after the high-pressure gas compressed by the high-pressure compressor is fully mixed with aviation kerosene flowing into a combustion chamber from a fuel oil adapter, the mixture is ignited by an ignition nozzle to be severely combusted and form high-temperature and high-pressure fuel gas, so that the gas is expanded and works through a turbine blade, and then the compressor is driven to work through a connecting shaft, so that the whole aeroengine is operated. In the process, the combustion chamber is used as an important component of the tissue combustion of the aero-engine and mainly comprises components such as a diffuser, a casing, a fuel nozzle, a flame tube, an ignition nozzle and the like.

At present, a double-wall flame tube structure is adopted by flame tubes on many aero-engine combustion chambers, an outer layer is an impact wall, an inner layer is a divergent wall, impact cooling holes are formed in the impact wall and used for performing impact cooling on the divergent wall, divergent holes are formed in the inner layer of the divergent wall, and an air film is formed on the wall surface of the inner layer of the flame tube, so that the effect of divergent cooling is achieved. There are also many aero-engine combustion chambers in which the flame tube has a single-wall flame tube structure, and cooling holes are directly formed in the wall surface, so that a cooling air film is formed. The ignition electric nozzle is directly fixed on a combustion chamber casing with relatively low temperature, then stretches into the flame tube to ignite, and in the working process, the temperature difference exists between the combustion casing and the flame tube, so that the problem of deformation incompatibility caused by thermal deformation easily occurs. The problem that the ignition electric nozzle is not coordinated due to deformation of the assembly position is solved, and the ignition electric nozzle is damaged due to collision between the flame tube and the ignition electric nozzle.

Disclosure of Invention

It is an object of the present invention to provide a mounting structure.

It is another object of the present invention to provide a liner outer ring.

It is a further object of the present invention to provide a combustion chamber.

It is a further object of the invention to provide an installation method.

According to an aspect of the invention, a mounting structure for mounting a thermal nozzle to an outer ring of a flame tube includes: a bushing including an extension portion and a mounting portion, the extension portion being formed by the mounting portion extending outward, the mounting portion having a through hole for passing through mounting the ignition tip; a retaining ring comprising a first end and a second end, said first end and said second end defining a gap of said retaining ring, said gap being of variable size such that the surrounding size of said retaining ring is variable; the outer shell is used for being integrally arranged with the outer ring of the flame tube and comprises a first part and a second part which are connected in the axial direction, the second part comprises a first ring, a second ring and a connecting wall which connects the outer sides of the first ring and the second ring, the first ring is formed by extending the first part outwards, and the second ring is formed by extending the connecting wall inwards; the first part provides a first accommodating space for accommodating the ignition electrode tip, and the second part provides a second accommodating space which is formed by the first ring, the second ring and the connecting wall and is used for accommodating the bushing and the positioning ring; the positioning ring is sleeved on the mounting part of the bushing, the second ring and the extending part of the bushing are positioned on two axial sides of the positioning ring, and the second ring limits the positioning ring and the extending part of the bushing in the second accommodating space.

According to the technical scheme, the mounting structure is arranged on the outer ring of the flame tube through the integral processing of the outer shell and the outer ring of the flame tube, compared with a mode of welding fixation, the strength can be guaranteed not to be weakened, the outer ring of the flame tube can not be caused to locally collapse, the ignition nozzle is guaranteed to extend into the extending amount in the outer ring of the flame tube, the extending amount is not required to be recovered manually, the time cost and the time cost of labor are saved, and the safe and reliable operation of an engine is guaranteed. In addition, through setting up to have the changeable holding ring of breach size and shell to cooperate and carry out spacingly to the bush, both can make the bush freely move in the second accommodation space, drive the thermal power mouth and take place the displacement together, avoid the thermal power mouth to collide with the outer loop of flame tube and appear damaging because of combustion chamber outside machine casket and flame tube outer loop temperature load and vibration load are unbalanced, make the dismouting of holding ring very convenient again, compare in adopting the activity space of welding mode constitution bush, be convenient for maintain the change to the bush, increase of service life, save cost.

In one or more embodiments of the mounting structure, the extension portion abuts the positioning ring to form a first annular band, the second ring abuts the positioning ring to form a second annular band, and the first annular band is located inside the second annular band.

In one or more embodiments of the mounting structure, a gap of 0.2mm is provided between a wall surface of the through hole of the mounting portion of the bushing and the ignition tip.

In one or more embodiments of the mounting structure, the extension of the bushing is circumferentially provided with a plurality of cooling holes.

In one or more embodiments of the mounting structure, an outer edge of the extension of the bushing has a gap of 1-2mm from the connecting wall.

In one or more embodiments of the mounting structure, the first and second ends of the retaining ring have a clamping portion.

In one or more embodiments of the mounting structure, the clamping portion includes a hole open at the first end and the second end.

In one or more embodiments of the mounting structure, upper and lower surfaces of the extension of the bushing are coated with a wear resistant coating.

According to another aspect of the invention, a flame tube outer ring comprises a body and a housing of the mounting structure, wherein the body surrounds and forms a space, the housing comprises a first part and a second part which are connected in the axial direction, the first part provides a first accommodating space, the second part provides a second accommodating space, and the first accommodating space, the second accommodating space and the space are directly communicated.

According to the combustion chamber, the combustion chamber comprises the outer casing, the outer ring of the flame tube, the ignition electric nozzle and the mounting structure, wherein the ignition electric nozzle is fixedly connected to the outer casing through the fixing piece, the outer casing of the mounting structure and the outer ring of the flame tube are integrally arranged, the ignition electric nozzle is mounted in the bushing of the mounting structure, and the ignition end of the ignition electric nozzle extends into the radial inner side of the outer ring of the flame tube and is used for ignition.

According to a further aspect of the present invention, a mounting method for mounting a thermal nozzle to an outer ring of a flame tube, using a mounting structure as described above, an inner edge of a second ring of the mounting structure forming an inlet of a second accommodating space of the mounting structure, includes:

s1, placing a bushing of the mounting structure into the second accommodating space through the inlet;

s2, sleeving a positioning ring of the mounting structure on the mounting part of the bushing;

s3, reducing a notch of the positioning ring, and placing the positioning ring into the second accommodating space through the inlet;

s4, restoring the size of the notch, and limiting the positioning ring and the bushing in the second accommodating space by the second ring.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the accompanying drawings and embodiments in which like reference numerals refer to like features throughout, it being noted that these drawings are given by way of example only, which are not drawn to scale and should not be construed to limit the true scope of the invention, wherein:

FIG. 1 is a schematic view of a combustion chamber according to an embodiment;

FIG. 2 is a schematic diagram of a mounting structure according to an embodiment;

FIG. 3 is a schematic view of the structure of a housing according to an embodiment;

FIG. 4 is a schematic view of a positioning ring according to an embodiment;

FIG. 5 is a schematic view of a liner according to an embodiment;

FIG. 6 is a schematic structural view of another view of a bushing of an embodiment;

FIG. 7 is a flow chart illustrating steps of an installation method according to an embodiment.

Reference numerals:

1000-combustion chamber;

10-mounting structure, 30-outer casing, 50-inner ring of flame tube, 60-inner and outer cap cover, 70-head switching section assembly, 80-main swirler, 90-front diffuser and 100-fuel nozzle;

20-ignition electric nozzle and 200-ignition end;

40-flame tube outer ring, 401-body, 402-space;

1-a bushing, 11-an extension part, 111-an outer edge, 12-a mounting part and 13-a through hole;

2-positioning ring, 201-outside, 21-first end, 22-second end, 23-notch, 24-clamping part, 241-hole;

3-housing, 31-first part, 301-first accommodation space, 32-second part, 302-second accommodation space, 321-first ring, 322-second ring, 3221-inner edge, 323-connecting wall;

41-a first endless belt, 42-a second endless belt;

5-cooling holes.

Detailed Description

Reference will now be made in detail to the various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with the exemplary embodiments, it will be appreciated that the present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

In the following description, references to orientations or positional relationships of "upper", "lower", "axial", "circumferential", "inner", "outer", or other orientation terms are based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the invention. It should be noted that "axial" refers to the axial direction of the ignition tip, mounting structure, and not the axial direction of the combustion chamber.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment" and/or "an embodiment" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.

Flowcharts are used in this application to describe the operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in order precisely. Other operations may also be added to or removed from these processes.

With the increasing demand for assembling the ignition nozzle with the combustion chamber, further improvement of the mounting structure of the ignition nozzle is required.

In order to protect the ignition nozzle from the problems of uncooled deformation of the combustor casing and the flame tube and vibration load in the working process of the combustor and prevent the ignition nozzle from being damaged due to collision with the flame tube, a floatable mounting device is generally designed at present so as to solve the problems of unbalanced temperature load and vibration load of the flame tube and the combustor casing, and the existing floatable mounting device is fixed on the flame tube in a welding mode.

The inventor of the application found through intensive research that the mode of welded connection can not only lead to junction intensity to reduce, through measurement calculation, intensity is 80% before not welding, moreover the whole circle welding heat affected zone is wide, the energy is high, the local collapse of flame tube is easy to lead to, and then influence the projecting amount of the ignition power nozzle, after local obvious collapse, cause the ignition power nozzle to stretch out of the flame tube too much, directly bear high temperature gas in the combustion chamber working process, the ablation phenomenon takes place, thereby influence the ignition device of engine, the security problem is initiated. In a contrast scheme, in order to solve the problem of local collapse of the flame tube, after the flame tube collapses, gaskets are additionally arranged at the assembling positions of the ignition electric nozzle and the combustion chamber casing, repeated disassembly and assembly measurement is manually carried out to select gaskets with proper thickness, the ignition electric nozzle is lifted, namely, the protrusion amount of the ignition electric nozzle from the flame tube is reduced, and the ignition electric nozzle is restored to the position before collapse, so that the labor cost and the time cost are greatly increased, and the normal operation of an engine is seriously influenced. In addition, in the comparison scheme, the floatable mounting device is assembled in a welding mode to form a space for limiting the floatable part in the space, and if the floatable part is damaged, the disassembly and maintenance are very difficult, and the whole mounting device needs to be replaced.

Based on the above considerations, the inventor has designed a mounting structure through setting up shell and the integrative processing of flame tube outer loop and set up mounting structure in the flame tube outer loop, compares in welded fastening's mode, not only can guarantee intensity can not weaken, can not lead to the flame tube outer loop to take place the local subsidence moreover, guarantees the extension volume that the ignition nozzle stretches into in the flame tube outer loop, need not the manual work and resumes the extension volume, practices thrift human cost time cost, guarantees safe and reliable operation of engine. In addition, through setting up to have the changeable holding ring of breach size and shell to cooperate and carry out spacingly to the bush, both can make the bush freely move in the second accommodation space, drive the thermal power mouth and take place the displacement together, avoid the thermal power mouth to collide with the outer loop of flame tube and appear damaging because of combustion chamber outside machine casket and flame tube outer loop temperature load and vibration load are unbalanced, make the dismouting of holding ring very convenient again, compare in adopting the activity space of welding mode constitution bush, be convenient for maintain the change to the bush, increase of service life, save cost.

Although the mounting structure disclosed in the embodiment of the present application is suitable for an aeroengine combustion chamber to achieve the effect of protecting the ignition nozzle, the mounting structure disclosed in the embodiment of the present application may be used for protecting the igniter without limitation.

As shown in fig. 1, the aeroengine combustion chamber 1000 mainly comprises the outer ring 40 of the flame tube, the fuel nozzle 100, the head switching section assembly 70, the inner and outer caps 60, the inner ring 50 of the flame tube, the outer casing 30 of the combustion chamber, the front diffuser 90, the main swirler 80, the ignition electric nozzle 20, the electric nozzle mounting structure 10 and other components. The ignition nozzle 20 is directly fixed on the outer casing 30 of the combustion chamber through bolts, the front end of the ignition nozzle 20 stretches into the outer ring 40 of the flame tube to ignite, high-temperature fuel gas generated by violent combustion of fuel oil and fuel gas is carried out in the flame tube in the whole combustion chamber working process, the flame tube plays a role of tissue combustion, the flame tube is subjected to repeated actions of the high-temperature fuel gas, and high temperature and cold-hot deformation, so that the flame tube is subjected to severe test, and in this case, the whole assembly position of the ignition nozzle 20 causes the problem that the deformation of the outer casing 30 of the combustion chamber with relatively low temperature and the outer ring 40 of the flame tube with high temperature is inconsistent, and meanwhile, the whole combustion chamber 1000 also bears vibration load in the combustion process. The ignition electrode nozzle 20 is affected by the two loads, and certain displacement exists in the radial direction and the axial direction of the flame tube, so that the ignition electrode nozzle 20 is prevented from colliding with the flame tube, and the displacement movement is absorbed by means of an ignition electrode nozzle mounting structure, specifically as follows:

referring to fig. 1 to 6, in one embodiment, a specific structure of the mounting structure 10 for mounting the thermal nozzle 20 to the outer ring 40 of the flame tube may be a structure including a bushing 1, a positioning ring 2, and a housing 3. The bushing 1 includes an extension 11 and a mounting portion 12, the extension 11 being formed by the mounting portion 12 extending outward, the mounting portion 12 having a through hole 13, the through hole 13 being for passing through the mounting point thermal nozzle 20. The retaining ring 2 includes a first end 21 and a second end 22, the first end 21 and the second end 22 defining a gap 23 of the retaining ring 2, the gap 23 being of variable size such that the size of the enclosure of the retaining ring 2 is variable. The casing 3 is configured to be integrally provided with the outer ring 40 of the flame tube, and includes a first portion 31 and a second portion 32 that are connected in an axial direction, the second portion 32 includes a first ring 321, a second ring 322, and a connecting wall 323 that connects the first ring 321 and an outer side of the second ring 322, the first ring 321 is formed by the first portion 31 extending outward, and the second ring 322 is formed by the connecting wall 323 extending inward; the first portion 31 provides a first accommodation space 301 for accommodating the ignition tip 20, and the second portion 32 provides a second accommodation space 302 constituted by a first ring 321, a second ring 322, and a connecting wall 323 for accommodating the bushing 1 and the positioning ring 2. The positioning ring 2 is sleeved on the mounting portion 12 of the bushing 1, the second ring 322 and the extending portion 11 of the bushing 1 are located at two axial sides of the positioning ring 2, and the second ring 322 limits the positioning ring 2 and the extending portion 11 of the bushing 1 in the second accommodating space 302.

The term "bush 1" as used herein means a structure that is in direct contact with the ignition electrode tip 20 and that can drive the ignition electrode tip 20 to displace and deform in an uncoordinated manner, and the mounting portion 12 of the bush 1 may be either straight or, as shown in fig. 6, the upper side of the mounting portion 12 may be flared, and the flared shape is easier to be assembled with the ignition electrode tip 20. In some embodiments, the liner 1 is a floating spacer.

The meaning of "retainer ring 2" herein refers to a structure that cooperates with the housing 3 to confine the bush 1 within the second accommodation space 302. In some embodiments, the positioning ring 2 is a collar.

The term "the surrounding dimension of the retainer ring 2" as used herein means that the retainer ring 2 has an outer edge and an inner edge, and the surrounding dimension is the surrounding dimension of the outer edge and the inner edge. The positioning ring 2 has a certain elasticity, and the surrounding dimension changes with the change of the gap dimension, for example, as shown in fig. 3, the first end 21 and the second end 21 are close to each other, the gap 23 becomes smaller, and the surrounding dimension of the positioning ring 2 becomes smaller.

The term "housing 3" as used herein refers to a structure that carries the liner 1 and the retainer ring 2 and allows the mounting structure 10 to be assembled with the outer liner ring 40. As shown in FIG. 1, the housing 3 is integrally formed with the outer liner ring, such that the mounting structure is positioned on the outer liner ring 40 and the ignition tip 20 is assembled to the outer liner ring 40.

The term "first portion 31" as used herein means a structure that is integrally provided with the outer ring of the liner and connects the first ring of the second portion to the outer ring of the liner, for example, a cylindrical structure as shown in fig. 3.

The meaning of the first ring 321, the second ring 322 and the connecting wall 323 is that the first ring 321 and the second ring 322 refer to annular shell walls, and the inner sides of the shell walls are penetrated, so that parts can pass through conveniently and related parts can be limited; the connection wall 323 is a case wall that connects the first ring 321 and the second ring 322, and forms the second accommodation space 302 together with the first ring 321 and the second ring 322.

The beneficial effects of this embodiment lie in, set up mounting structure in the flame tube outer loop through setting up shell and the integrative processing of flame tube outer loop, compare in welded fastening's mode, not only can guarantee intensity can not weaken, can not lead to the flame tube outer loop to take place the local subsidence moreover, guarantee the firing nozzle and stretch into the volume of stretching into in the flame tube outer loop, need not the manual work and resume the volume of stretching into, practice thrift human cost time cost, guarantee engine safe and reliable operation. In addition, through setting up to have the changeable holding ring of breach size and shell to cooperate and carry out spacingly to the bush, both can make the bush freely move in the second accommodation space, drive the thermal power mouth and take place the displacement together, avoid the thermal power mouth to collide with the outer loop of flame tube and appear damaging because of combustion chamber outside machine casket and flame tube outer loop temperature load and vibration load are unbalanced, make the dismouting of holding ring very convenient again, compare in adopting the activity space of welding mode constitution bush, be convenient for maintain the change to the bush, increase of service life, save cost.

Referring to fig. 2 to 6, in some embodiments, the mounting structure 10 may be specifically configured such that the extension 11 abuts against the positioning ring 2 to form a first annular band 41, the second ring 322 abuts against the positioning ring 2 to form a second annular band 42, and the first annular band 41 is located inside the second annular band 42. Specifically, the outer edge dimension of the extension portion 11 is smaller than or equal to the inner edge dimension of the second ring 322, and in the assembled state, the outer edge dimension of the positioning ring 2 is larger than the inner edge dimension of the second ring 322, and the positioning ring 2 is simultaneously abutted against the extension portion 11 and the second ring 322. The advantage of this arrangement is that it ensures that the bushing 1 is easily placed into the second accommodation space 302 from the inside of the second ring 322, facilitating the assembly of the mounting structure 10.

Referring to fig. 2 in combination with fig. 5 and 6, in some embodiments, the mounting structure 10 may be specifically configured such that a gap of 0.2mm is provided between the wall surface of the through hole 13 of the mounting portion 12 of the liner 1 and the ignition tip 20. The beneficial effect that so set up lies in, guarantees the assembly reliability of ignition power mouth and bush, prevents that the condition of dress from taking place, improves the assembly convenience.

Referring to fig. 5, in some embodiments, the bushing 1 may be specifically configured such that the extension 11 is circumferentially provided with a plurality of cooling holes 5. The beneficial effect that so set up lies in, cooling hole 5 accessible is from the cooling air in the annular chamber between flame tube outer loop 40 and combustion chamber outer housing 30 to cool off ignition nozzle 20, realizes cooling effect to a certain extent, prevents ignition nozzle 20 damage because of the high temperature, prolongs the life of ignition nozzle 20.

Referring to fig. 2 in combination with fig. 3 and 6, in some examples, the mounting structure 10 may be specifically configured such that the outer edge 111 of the extension 11 of the bushing 1 has a gap of 1-2mm from the connecting wall 323. The beneficial effect of setting like this lies in, through the clearance between bush 1 and the linking wall 323, guarantees that bush 1 can not block at second accommodation space 302, and the bush 1 of being convenient for carries out the free movement, and the temperature load and the unbalanced problem of vibration load of the outer loop of the outdoor unit casket of drive combustion chamber and flame tube of taking place the displacement together with the mouth 20 of starting.

In some embodiments, as shown in fig. 2 and fig. 3, a gap of 0.1mm is formed between the positioning ring 2 and the second ring 322, so as to prevent the liner 1 from being blocked in the axial direction, ensure that the liner 1 can freely move in the second accommodating space 302, and not only can cope with the problems of temperature load and vibration load of the casing 30 and the outer ring 40 of the flame tube, but also can not influence the penetration amount of the ignition nozzle 20.

Referring to fig. 4, in some embodiments, the positioning ring 2 may be specifically configured with a first end 21 and a second end 22 having a clamping portion 24. The term "grip portion 24" as used herein refers to a structure that facilitates adjustment of the tool force to the size of the gap 23 between the first and second ends 21, 22. The beneficial effect that so set up lies in, increases the convenience of adjusting locating ring 2 surrounding dimension size, improves dismouting efficiency.

With continued reference to fig. 4, in some embodiments, the clamping portion 24 may be configured to include a hole 241 formed in the first and second ends 21, 22. Specifically, as shown in fig. 3 and fig. 4, the sharp-nose pliers tool can be used to clamp the hole 241, the notch 23 is reduced, the surrounding size of the positioning ring 2 is smaller than the inner edge 3221 of the second ring 322, the positioning ring 2 is smoothly placed into the second accommodating space 302 through the second ring 322, and then the sharp-nose pliers tool is loosened, so that the positioning ring 2 is in a free state to recover the surrounding size, and the positioning ring 2 is matched with the second ring 322 to limit the bushing 1.

Referring to fig. 5 in conjunction with fig. 6, in some embodiments, the bushing 1 may be specifically configured such that the upper and lower surfaces of the extension 11 are coated with a wear-resistant coating. Specifically, as shown in fig. 2 to 6, since the bushing 1 is assembled between the positioning ring 2 and the first ring 321 and can freely move in the second accommodating space 30, a chrome plating coating is added at the matching surface of the bushing 1, the positioning ring 2 and the first ring 321 to form a wear-resistant layer, so that the bushing 1 is prevented from being damaged due to relative friction, and after a certain period of working, the positioning ring 2 can be disassembled by using a tool to replace the bushing 1, thereby prolonging the service life of the installation structure.

Referring to fig. 1 to 6, in one embodiment, the specific structure of the outer ring 40 of the flame tube may be that the housing 3 includes the body 401 and the mounting structure 10 as described above, where the body 401 surrounds and forms a space 402, and the housing 3 includes the first portion 31 and the second portion 32 connected in the axial direction, the first portion 31 provides the first accommodating space 301, the second portion 32 provides the second accommodating space 302, and the first accommodating space 301, the second accommodating space 302, and the space 402 are directly communicated. The beneficial effect that so set up lies in, set up mounting structure in the flame tube outer loop through setting up shell and the integrative processing of flame tube outer loop, compare in welded fastening's mode, not only can guarantee intensity can not weaken, can not lead to the flame tube outer loop to take place the local subsidence moreover, guarantees the firing nozzle and stretches into the volume of stretching into in the flame tube outer loop, need not the manual work and resumes the volume of stretching into, practices thrift human cost time cost, guarantees engine safe and reliable operation.

With continued reference to fig. 1-6, in one embodiment, the specific structure of the combustion chamber 1000 may include the outer casing 30, the outer ring of the flame tube 40, the ignition electrode tip 20 and the mounting structure 10 as described above, where the ignition electrode tip 20 is fixedly connected to the outer casing 30 through a fixing member, the outer casing 3 of the mounting structure 10 is integrally disposed with the outer ring of the flame tube 40, the ignition electrode tip 20 is mounted in the liner 1 of the mounting structure 10, and the ignition end 200 of the ignition electrode tip 20 extends into the inner side of the outer ring of the flame tube 40 for ignition. The beneficial effect that so set up lies in, will fire the assembly of thermal nozzle and combustion chamber through setting up mounting structure, can effectively be to the unbalanced problem of temperature load and vibration load of combustion chamber outer casing and flame tube outer loop, replaces welded connected mode with integrative processing simultaneously, has both guaranteed assembly strength, has avoided the flame tube to collapse again and has promoted assembly reliability, guarantees the safe operation of combustion chamber.

Referring to fig. 1 to 7, in one embodiment, with the mounting structure 10 as described above, the inner edge 3221 of the second ring 322 of the mounting structure 10 forms an inlet of the second accommodating space 302 of the mounting structure 10, and the specific steps of the method for mounting the thermal nozzle 20 on the outer ring 40 of the burner tube may be that the method includes:

s1, placing the bushing 1 of the mounting structure 10 into the second accommodating space 302 from an inlet.

S2, sleeving the positioning ring 2 of the mounting structure 10 on the mounting part 12 of the bushing 1.

S3, reducing the notch 23 of the positioning ring 2, and placing the positioning ring 2 into the second accommodating space 302 from the inlet. Specifically, as described above, the tool clamping hole 241 of the nipper pliers may be used to reduce the notch 23, so that the surrounding size of the positioning ring 2 is smaller than the inner edge 3221 of the second ring 322, and the positioning ring 2 is smoothly placed into the second accommodating space 302 directly through the second ring 322.

S4, restoring the size of the notch 23, and limiting the positioning ring 2 and the bushing 1 in the second accommodating space 302 by the second ring 322. As described above, the sharp-angled pliers tool is released to enable the positioning ring 2 to recover the surrounding size in a free state, and the positioning ring cooperates with the second ring 322 to limit the bushing 1.

After the mounting structure 10 is assembled, the ignition nozzle 20 is inserted from the mounting portion 12 of the liner 1 into the space 402 formed by the outer ring 40 of the flame tube through the first accommodation space 301 of the first portion 31 of the housing 3.

The beneficial effects that so set up lie in, dismouting holding ring that can be very convenient is convenient for maintain the change to the bush, increase of service life practices thrift the cost.

In summary, the advantageous effects of the outer ring of the liner, the combustion chamber, the mounting structure and the method described in the above embodiments include, but are not limited to, one or a combination of the following:

1. the mounting structure of this application sets up mounting structure in the flame tube outer loop through setting up shell and flame tube outer loop integrated into one piece processing, compares in welded fastening's mode, not only can guarantee intensity can not weaken, can not lead to the flame tube outer loop to take place the local subsidence moreover, guarantees that ignition nozzle stretches into the volume of stretching into in the flame tube outer loop, need not the manual work and resumes the volume of stretching into, practices thrift human cost time cost, guarantees engine safe and reliable operation. In addition, through setting up to have the changeable holding ring of breach size and shell to cooperate and carry out spacingly to the bush, both can make the bush freely move in the second accommodation space, drive the thermal power mouth and take place the displacement together, avoid the thermal power mouth to collide with the outer loop of flame tube and appear damaging because of combustion chamber outside machine casket and flame tube outer loop temperature load and vibration load are unbalanced, make the dismouting of holding ring very convenient again, compare in adopting the activity space of welding mode constitution bush, be convenient for maintain the change to the bush, increase of service life, save cost.

2. According to the flame tube outer ring, the mounting structure is arranged on the flame tube outer ring through the integral processing of the outer shell and the flame tube outer ring, compared with a mode of welding fixation, the flame tube outer ring can be guaranteed not to weaken in strength, the flame tube outer ring cannot be caused to locally collapse, the ignition nozzle is guaranteed to extend into the extending amount in the flame tube outer ring, the extending amount is not required to be recovered manually, the time cost of labor cost is saved, and the safe and reliable operation of an engine is guaranteed.

3. The combustion chamber of this application is through setting up mounting structure with the assembly of ignition power mouth with the combustion chamber, can effectively be to the unbalanced problem of temperature load and vibration load of combustion chamber outside machine casket and flame tube outer loop, replaces welded connected mode with integrative processing simultaneously, has both guaranteed assembly strength, has avoided the flame tube to collapse again and has promoted assembly reliability, guarantees the safe operation of combustion chamber.

4. The installation method of the bushing positioning ring can be very convenient to disassemble and assemble, is convenient to maintain and replace the bushing, prolongs the service life and saves the cost.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.

Claims (11)

1. A mounting structure for mounting a thermal nozzle to a liner outer ring, comprising:

a bushing including an extension portion and a mounting portion, the extension portion being formed by the mounting portion extending outward, the mounting portion having a through hole for passing through mounting the ignition tip;

a retaining ring comprising a first end and a second end, said first end and said second end defining a gap of said retaining ring, said gap being of variable size such that the surrounding size of said retaining ring is variable;

the outer shell is used for being integrally arranged with the outer ring of the flame tube and comprises a first part and a second part which are connected in the axial direction, the second part comprises a first ring, a second ring and a connecting wall which connects the outer sides of the first ring and the second ring, the first ring is formed by extending the first part outwards, and the second ring is formed by extending the connecting wall inwards; the first part provides a first accommodating space for accommodating the ignition electrode tip, and the second part provides a second accommodating space which is formed by the first ring, the second ring and the connecting wall and is used for accommodating the bushing and the positioning ring;

the positioning ring is sleeved on the mounting part of the bushing, the second ring and the extending part of the bushing are positioned on two axial sides of the positioning ring, and the second ring limits the positioning ring and the extending part of the bushing in the second accommodating space.

2. The mounting structure of claim 1, wherein the extension abuts the retaining ring to form a first annular band, and the second ring abuts the retaining ring to form a second annular band, the first annular band being located inboard of the second annular band.

3. The mounting structure according to claim 1, wherein a clearance of 0.2mm is provided between a wall surface of the through hole of the mounting portion of the bush and the ignition tip.

4. The mounting structure according to claim 1, wherein the extension portion of the bushing is circumferentially provided with a plurality of cooling holes.

5. The mounting structure of claim 1, wherein an outer edge of the extension of the bushing has a gap of 1-2mm from the connecting wall.

6. The mounting structure of claim 1, wherein the first and second ends of the retaining ring have clamping portions.

7. The mounting structure of claim 6, wherein the clip portion includes holes open at the first and second ends.

8. The mounting structure of claim 1, wherein upper and lower surfaces of the extension of the bushing are coated with a wear resistant coating.

9. A flame tube outer ring, characterized by comprising a body and a housing of the mounting structure of any one of claims 1-8, wherein the body encloses a space, the housing comprises a first part and a second part connected in an axial direction, the first part provides a first accommodation space, the second part provides a second accommodation space, and the first accommodation space, the second accommodation space and the space are directly communicated.

10. The combustion chamber is characterized by comprising an outer casing, a flame tube outer ring, an ignition electric nozzle and the mounting structure as claimed in any one of claims 1-8, wherein the ignition electric nozzle is fixedly connected to the outer casing through a fixing piece, a shell of the mounting structure and the flame tube outer ring are integrally arranged, the ignition electric nozzle is mounted in a bushing of the mounting structure, and an ignition end of the ignition electric nozzle extends into the radial inner side of the flame tube outer ring and is used for ignition.

11. A method of installing a thermal nozzle to an outer ring of a flame tube using a mounting structure according to any one of claims 1 to 8, wherein an inner edge of a second ring of the mounting structure forms an inlet to a second receiving space of the mounting structure, comprising:

s1, placing a bushing of the mounting structure into the second accommodating space through the inlet;

s2, sleeving a positioning ring of the mounting structure on the mounting part of the bushing;

s3, reducing a notch of the positioning ring, and placing the positioning ring into the second accommodating space through the inlet;

s4, restoring the size of the notch, and limiting the positioning ring and the bushing in the second accommodating space by the second ring.