CN113819489A

CN113819489A - Gas turbine, combustion chamber and swirler assembly thereof

Info

Publication number: CN113819489A
Application number: CN202010568824.4A
Authority: CN
Inventors: 平学寿; 易琪; 李若皙
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-12-21
Anticipated expiration: 2040-06-19
Also published as: CN113819489B

Abstract

It is an object of the present invention to provide a swirler assembly that is easy to install and to prevent rotation of the swirler. It is another object of the present invention to provide a combustor having the swirler assembly described above. It is a further object of the present invention to provide a gas turbine having the aforementioned combustor. To achieve the above object, a swirler assembly comprising an adapter and a plurality of swirlers is provided. The cyclones comprise a plurality of first cyclones and second cyclones. The first swirler has a first mating portion and the second swirler has a second mating portion. The first cyclones and the second cyclones are alternately distributed along the annular mounting surface of the adapter one by one, at least one cyclone is provided with a third matching portion, and the adapter is provided with a fourth matching portion. The first matching part is matched with the second matching part, and the third matching part is matched with the fourth matching part so as to be matched with the fourth matching part together to limit the first cyclones and the second cyclones to rotate in the mounting hole.

Description

Gas turbine, combustion chamber and swirler assembly thereof

Technical Field

The invention relates to a gas turbine, a combustion chamber and a swirler assembly thereof.

Background

A swirler structure is often installed at the head of a flame tube in a combustion chamber of an aero-engine to achieve the purpose of rotating airflow, and the airflow passing through the swirler is thrown away by centrifugal force, so that a low-pressure area appears in the center of the swirler, backflow is formed, the axial speed of the airflow is reduced, and ignition and combustion are stabilized. In addition, the swirler can fully premix fuel and air flow sprayed by the fuel nozzle, so that the combustion efficiency can be effectively improved, and the emission can be reduced.

The swirler is generally installed at the head of the flame tube in one-to-one correspondence with the fuel nozzles, and the swirler can rotate the airflow, so that the swirler can receive the reaction force of the airflow, and in order to avoid the problems of rotation, vibration and the like of the swirler, the rotation prevention and the shock absorption need to be considered in the installation of the swirler on the switching section of the head of the flame tube.

The existing cyclone mounting modes include the following two common modes:

the first mode is that the swirler is pressed on a mounting plane of a head transition stage in a pressing plate mode, and the pressing plate is fixedly connected with a flange edge of a transition section of the head of the flame tube through a bolt hole. Every swirler needs inside and outside each clamp plate to realize that the swirler avoids rotatoryly under the prerequisite that can float, in addition, for avoiding the swirler to rotate, swirler both sides need design two lugs and realize the overlap joint of each other and prevent changeing, and this mode is for guaranteeing the installation, and the lug design often can only guarantee a direction and prevent changeing. The design method has the following disadvantages: the cyclones can only be in one-way lap joint, pressure plates with the number being twice that of the cyclones are needed for ensuring installation and rotation prevention, a large part of extra weight is brought, and the weight reduction design is a permanent theme of the design of an aeroengine. In addition, the clamp plate passes through the bolt tightening installation, with swirler crimping clearance uncontrollable, this problem leads to the problem that swirler jamming or throw off among the experimentation easily, and swirler jamming can influence the nozzle dismouting, and throw off and can make to prevent changeing the inefficacy, brings vibration, whirl inefficacy scheduling problem, seriously influences the use and the security of engine.

Mode two, adopt the panel beating to bend into the buckle form welding on head switching section mounting surface, with swirler rotary installation in the buckle draw-in groove, adopt one-way lug to avoid swirler to rotate along with the air current equally, what another direction prevented changeing then realizes through the panel beating flange. The disadvantages of this approach are: the metal plate size tolerance is often large, the effective control of the mounting clearance of the swirler is difficult to realize, extra leakage can be brought, and the efficiency of the engine is influenced. In addition, the metal plate is welded on the head switching section in a buckling mode, the welding precision is difficult to control, and the free floating of the cyclone is easily influenced; of course, welding also necessarily affects the body structure of the transition section.

Disclosure of Invention

It is an object of the present invention to provide a swirler assembly that is easy to install and to prevent rotation of the swirler.

It is another object of the present invention to provide a combustor having the swirler assembly described above.

It is a further object of the present invention to provide a gas turbine having the aforementioned combustor.

The swirler assembly comprises an adapter and a plurality of swirlers, wherein the adapter is used for mounting the swirlers on the flame tube head and is provided with an annular mounting surface, a plurality of mounting holes are formed in the annular mounting surface, and the swirlers are detachably mounted in the mounting holes;

the cyclone comprises:

a plurality of first cyclones having a first fitting portion; and

a plurality of second cyclones having second fitting portions;

the first cyclones and the second cyclones are alternately distributed along the annular mounting surface one by one, at least one of the cyclones is provided with a third matching portion, the adapter piece is provided with a fourth matching portion, the first matching portion is matched with the second matching portion in an assembling state, and the third matching portion is matched with the fourth matching portion to jointly match and limit the first cyclones and the second cyclones to rotate in the mounting hole.

In one or more embodiments, the number of the cyclones is even, and the first and second cyclones are provided with the first and second fitting portions that are fitted to each other on side walls on sides adjacent to each other, respectively;

the number of the fourth matching parts is one, the third matching parts are arranged in each cyclone, and at least one third matching part is connected with the fourth matching parts in a matched mode in an assembling state.

In one or more embodiments, for any of the first cyclones, the first cooperating portion on one side thereof cooperates with the second cooperating portion of the second cyclone adjacent thereto on that side to restrict rotation of the first cyclone in a first direction; the first matching part on the other side of the first swirler is matched with the second matching part of the second swirler adjacent to the first swirler on the other side of the first swirler to limit the first swirler to rotate along a second direction;

for any of the second cyclones, the second engaging portion on one side thereof engages with the first engaging portion of the first cyclone adjacent thereto on that side to restrict rotation of the second cyclone in a third direction; the second matching part on the other side of the first swirler is matched with the first matching part of the first swirler adjacent to the second swirler on the other side of the first swirler to limit the second swirler to rotate along a fourth direction;

wherein one of the first direction and the second direction is clockwise, and the other is counterclockwise; one of the third direction and the fourth direction is a clockwise direction, and the other is a counterclockwise direction.

In one or more embodiments, the first engaging portion is a first protruding portion disposed on both sides of the first swirler, and the second engaging portion is a second protruding portion disposed on both sides of the second swirler.

In one or more embodiments, the number of the cyclones is an odd number, and the cyclones have a pair of two first cyclones or two second cyclones which are adjacently arranged, and the first fitting portion or the second fitting portion is not arranged on a side adjacent to each other;

the third matching parts are respectively arranged in the at least one pair of first swirler and the second swirler which are adjacently arranged, and the fourth matching parts have the number corresponding to the third matching parts.

In one or more embodiments, the third mating portion is a third lug, and the fourth mating portion is a platen member having a channel portion that mates with the mating channel portion;

wherein, the clamp plate spare with adapter can dismantle the connection.

In one or more embodiments, the swirler has a fifth fitting portion, the mounting hole has a sixth fitting portion, and the swirler is detachably fitted in the mounting hole through the fifth fitting portion and the sixth fitting portion.

In one or more embodiments, the swirler has a first flange and a first mounting edge arranged along the circumferential direction, a circumferential clamping groove is formed between the first flange and the first mounting edge, a second flange is arranged in the mounting hole, and an opening part is formed between the second flanges;

the circumferential clamping groove is the fifth matching portion, the second flange is the sixth matching portion, the opening portion allows the first flange to enter, and the swirler is rotated, so that the second flange is connected with the circumferential clamping groove in a matched mode.

In one or more embodiments, in the assembled state, there is an axial clearance between the circumferential catch groove and the second flange.

The combustor for achieving the other purposes comprises a flame tube, a fuel nozzle, a combustor casing and a diffuser, and is characterized in that the head of the flame tube is provided with the swirler assembly.

To achieve still another of the foregoing objects, a gas turbine includes the combustor as set forth above.

The gain effect of the present invention includes at least one or more of the following:

1) this swirler subassembly prevents through the cooperation of first to fourth cooperation portion and changes, has realized preventing changeing to every swirler under the prerequisite that does not increase swirler subassembly's structure complexity and whole weight.

2) This swirler subassembly avoids adopting modes such as welding, buckle to prevent changeing, and is little to the body structure influence of swirler subassembly.

3) The swirler can be effectively installed and can float freely, the nozzle is convenient to install, and the problem of clamping stagnation or separation cannot be caused.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic view of a prior art aircraft engine;

FIG. 2 shows a schematic view of the combustion chamber;

FIG. 3 illustrates a schematic front view of an embodiment of the present cyclone assembly;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

FIG. 5 illustrates a schematic perspective view of an embodiment of a cyclone;

FIG. 6 shows a close-up schematic view of an embodiment with an odd number of cyclones;

FIG. 7 illustrates a perspective view of one embodiment of a platen member;

FIG. 8 illustrates a partially enlarged perspective view of one embodiment of an adapter;

FIG. 9 illustrates a schematic perspective view of an embodiment of the first swirler with the adapter unassembled;

FIG. 10 shows a schematic cross-sectional view of an embodiment of the first cyclone in an assembled state with the adapter.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present disclosure. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

It should be noted that, where used, the following description of upper, lower, left, right, front, rear, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object.

It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the invention as it is actually claimed. Further, the conversion methods in the different embodiments may be appropriately combined.

As shown in fig. 1, the schematic diagram of the conventional aircraft engine is shown, the aircraft engine is composed of a compressor 91, a combustion chamber 92, a turbine 93 and other parts, the compressor 91 compresses air, the air is combusted in the combustion chamber 92, the air applies work to the turbine 93, chemical energy of fuel oil is converted into mechanical energy of the turbine, and the turbine exhausts gas and drives a fan 90 to generate thrust.

As shown in fig. 2, the structure of the combustion chamber is schematically illustrated, the combustion chamber 92 mainly comprises a liner 921, a fuel nozzle 922, a combustion chamber casing 923, a diffuser 924 and the like, and the compressed air of the compressor 91 enters the liner 921 after being decelerated and diffused by the diffuser 924 to be mixed with the fuel sprayed from the fuel nozzle 922 for combustion. Fuel nozzles 922 are mounted to combustor case 923 and project nozzle tips 925 into liner tips 920 for fuel injection.

In order to ensure that the fuel gas is stably combusted in the flame tube 921, the flame tube head 920 is provided with a swirler, the direction of the airflow after flowing through the swirler is changed from the axial direction to the rotating direction, and the fuel oil sprayed from the nozzle head 925 is atomized and fully mixed and enters the flame tube 921 for tissue combustion.

One aspect of the present invention provides a swirler assembly, as illustrated in fig. 3 in a schematic front view under an embodiment of the present swirler assembly, comprising an adapter 1 and a plurality of swirlers 2, the adapter 1 being used to mount the plurality of swirlers 2 to a combustor basket head 920 as illustrated in fig. 2. The adapter 1 is a ring-shaped element, as shown in the figures, which can be brought into a mating connection with the liner head 920 and has an annular mounting surface 10. A plurality of mounting holes 11 are opened in the annular mounting surface, and a plurality of cyclones 2 are detachably mounted in the plurality of mounting holes 11.

Fig. 4 is a partially enlarged view of fig. 3, please refer to fig. 3 to fig. 4 in combination. Wherein the swirler 2 comprises a plurality of first swirlers 21 and a plurality of second swirlers 22, wherein "first" and "second" as referred to herein may refer to a first configuration as well as a second configuration.

The first swirler 21 has a first mating portion 210 and the second swirler 22 has a second mating portion 220. As shown in fig. 1, the first cyclones 21 and the second cyclones 22 are alternately distributed along the annular mounting surface 10, that is, two sides of each first cyclone 21 are respectively adjacent to the two second cyclones 22, and similarly, two sides of each second cyclone 22 are respectively adjacent to the two first cyclones 21.

In an embodiment shown in the drawings, the third engaging portion 230 is disposed on the first swirler 21, and in other embodiments different from those shown in the drawings, the third engaging portion 230 may be disposed on the second swirler 22, or disposed on one or more of the first swirlers 21 and the second swirlers 22, or disposed on a plurality of the first swirlers 21 or the second swirlers 22. Correspondingly, a fourth mating portion 12 is provided on the adapter 1. In the assembled state as shown in the drawings, the first engaging portion 210 engages with the second engaging portion 220, and at the same time, the third engaging portion 230 engages with the fourth engaging portion 12, thereby cooperatively restricting rotation of the plurality of first swirlers 21 and the plurality of second swirlers 22 in the mounting hole 11. Specifically, the first and second

fitting portions

210 and 220 cooperate to define the relative rotation between any two adjacent first and second swirlers 21 and 22, and the third and fourth

fitting portions

230 and 12 cooperate to define the overall rotation tendency of the annular assembly formed by the assembled first and second swirlers 21 and 22.

This swirler subassembly prevents through the cooperation of first to fourth cooperation portion and changes, has realized preventing changeing to every swirler under the prerequisite that does not increase swirler subassembly's structure complexity and whole weight.

Although one embodiment of the present cyclone assembly is described above, in other embodiments of the present cyclone assembly, the cyclone assembly may have more details than the embodiments described above in many respects, and at least some of these details may vary widely. At least some of these details and variations are described below in several embodiments.

In the embodiment shown in fig. 3, the number of cyclones 2 is an even number, wherein the number of cyclones 2 may be 18 as shown in the figure, and in some other embodiments, the number of cyclones 2 may be another even number. Wherein, the first cyclone 21 and the second cyclone 22 in the cyclones 2 are respectively provided with a first matching portion 210 and a second matching portion 220 on the side walls of the adjacent sides, the third matching portion 230 is provided in each cyclone 2, the number of the fourth matching portions 12 is one, and the third matching portion 230 in at least one cyclone 2 is matched and connected with the fourth matching portion 12 in the assembling state as shown in fig. 3.

Further, for any first swirler 21, the first mating portion 210 on one side thereof mates with the second mating portion 220 of the second swirler 22 adjacent thereto on that side to restrict rotation of the first swirler 21 in the first direction; the first engaging portion 210 on the other side thereof engages with the second engaging portion 220 of the second swirler 22 adjacent thereto on the other side to restrict rotation of the first swirler 21 in the second direction. For any second swirler 22, the second mating portion 220 on one side thereof mates with the first mating portion 210 of the first swirler 21 adjacent thereto on that side to restrict rotation of the second swirler 22 in the third direction; the second engaging portion 220 on the other side thereof engages with the first engaging portion 210 of the first swirler 21 adjacent thereto on the other side to restrict rotation of the second swirler 22 in the fourth direction. Wherein, one of the first direction and the second direction is clockwise, and the other is anticlockwise; one of the third direction and the fourth direction is clockwise, and the other is counterclockwise.

Specifically, in the embodiment illustrated in fig. 3, in the group of first swirler 21a and second swirler 22a arranged adjacent to each other on one side, a first engaging portion 210a is provided on a side of first swirler 21a adjacent to second swirler 22a, that is, a right side wall as viewed in the drawing, a second engaging portion 220a is provided on a side of second swirler 22a adjacent to first swirler 21a, that is, a left side wall as viewed in the drawing, and first engaging portion 210a and second engaging portion 220a are engaged with each other to restrict counterclockwise rotation of first swirler 21a with respect to second swirler 22 a. In the group of first swirler 21a and second swirler 22b arranged adjacent to each other on the other side, a first engaging portion 210b is provided on one side, i.e., a left side wall in the drawing, of first swirler 21a and second swirler 22b, a second engaging portion 220b is provided on one side, i.e., a right side wall in the drawing, of second swirler 22b adjacent to first swirler 21a, and first engaging portion 210b and second engaging portion 220b are engaged with each other to restrict clockwise rotation of first swirler 21a relative to second swirler 22 a. The first swirler 21a is engaged with the second engaging portion 220a through the first engaging portion 210a on one side and the second engaging portion 220b through the first engaging portion 210b on the other side, so as to limit the rotation of the first swirler 21 a. It will be appreciated that the first cyclones 21a may refer to any one of the first cyclones 21.

Correspondingly, on the side of the second swirler 22a adjacent to the first swirler 21a, the first engaging portion 210a and the second engaging portion 220a engage with each other to restrict the second swirler 22a from rotating counterclockwise relative to the first swirler 21 a. The other side of the first swirler 21b is provided with a first swirler 21b which is adjacently arranged, one side of the second swirler 22a which is adjacent to the first swirler 21b, namely a right side wall in the drawing, is provided with a second matching portion 220c, one side of the first swirler 21b which is adjacent to the second swirler 22a, namely a left side wall in the drawing, is provided with a first matching portion 210c, and the second matching portion 220c and the first matching portion 210c are mutually matched to limit the clockwise rotation of the second swirler 22a relative to the first swirler 21 a. It will be appreciated that the second swirler 22a may refer to any one of the second swirlers 22.

Since the number of the cyclones 2 is even, that is, each of the first cyclones 21 has the second cyclone 22 on both sides thereof, the first engaging portion 210 and the second engaging portion 220 can alternately engage with each other along the annular mounting surface 10 to restrict relative rotation between the adjacent first cyclones 21 and the second cyclones 22. At the same time, only one fourth engagement portion 12 is required to limit rotation between the first and second plurality of

cyclones

21, 22. Meanwhile, the third fitting portion 230 is provided in each swirler 2, so that it is easier to assemble.

It will be understood that the swirler 2 is of a cylindrical structure, and the references to "side" and "one side" are each a section of the sidewall of the cylindrical structure along the circumferential direction.

Many variations are possible in the embodiment shown in fig. 3, such as variations in the positional relationship between the first and second mating portions, such as in an exemplary embodiment, interchanging the positional relationship between the first and second mating portions, such that the first and

second mating portions

210a and 220a mate with each other to limit clockwise rotation of the first swirler 21a relative to the second swirler 22 a; the first and second engaging

portions

210b and 220b engage with each other to restrict the first swirler 21a from rotating counterclockwise relative to the second swirler 22 a. In another embodiment, the third fitting portion 230 and the fourth fitting portion 12 may be provided in plurality, respectively, so as to further limit the rotation prevention of the swirler 2. In another embodiment, a third mating portion 230 is provided in only one swirler 2, which third mating portion of that swirler 2 is in mating contact with the fourth mating portion 12 when assembled.

Referring to fig. 5, which shows a schematic perspective view of an embodiment of the cyclone, the cyclone 2 shown in fig. 5 may be a first cyclone 21 or a second cyclone 22, and only the cyclone shown in fig. 5 is illustrated as the first cyclone 21. The first engaging portion 210 is a first protruding portion disposed on two sides of the first swirler 21 as shown in the figure, and correspondingly, the second engaging portion 220 is a second protruding portion disposed on two sides of the second swirler. Referring to fig. 3 and 5, the first engaging portion 210 and the second engaging portion 220 engage with each other in an abutting manner to limit rotation of the first swirler 21 and/or the second swirler 22. Meanwhile, the convex parts are used for limiting, so that when two adjacent first cyclones 21 or second cyclones 22 float along the radial direction, the convex parts cannot limit the adjacent first cyclones or second cyclones, and therefore the cyclones can be driven by the nozzle head to float, and blind installation of the nozzle is facilitated.

In some embodiments different from that shown in fig. 5, there may be many suitable variations or changes in the structure of the first mating portion and/or the second mating portion, such as one embodiment in which one of the first mating portion and the second mating portion is a groove portion formed by two convex portions, and the second mating portion is a convex portion capable of mating with the groove portion. In another embodiment, the first mating portion and/or the second mating portion may be a kind of catch arm. In the embodiment shown in fig. 5, there is only one first and second fitting portions located at adjacent sides, and in some other embodiments, there may be a plurality of first and second fitting portions located at adjacent sides.

In another embodiment of the swirler assembly, the number of swirlers is odd, and fig. 6 shows a partially enlarged schematic view of an embodiment in which the number of swirlers is odd. Here, in the pair of first swirler 21f and first swirler 21g which are adjacently disposed as shown in the drawing, the first engaging portion is not provided on the side adjacent to each other, and the third engaging portion 230 is provided in the first swirler 21f and the first swirler 21g, respectively, and the number of the fourth engaging portions 12 is two corresponding to the number of the third engaging portions 230. And the other one or more pairs of first and second cyclones are provided with first and second mating portions in mutually adjacent sides. In the figures, two first cyclones are shown adjacent to each other, but it is understood that in embodiments in which the number of cyclones is odd, two second cyclones may be provided adjacent to each other, and the second engagement portion is not provided on the side adjacent to each other.

In one embodiment of the swirler assembly, the third mating portion 230 is a third lug as shown in fig. 5, and the fourth mating portion 12 is a pressure plate member as shown in fig. 7, the pressure plate member having a slot 120 for mating with the third lug for limiting rotation of the swirler by mating engagement of the slot 120 with the fourth mating portion 12. Wherein the pressure plate member is detachably connected with the adaptor 1, such as by a fastener. Through setting up detachable pressure plate spare for when preventing changeing swirler 2, need not to adopt traditional welding method, simplified the operation, prevent simultaneously if the damage of operation such as welding to swirler subassembly body. In other embodiments, the third mating portion may be a groove and the fourth mating portion may be a protrusion. In another embodiment, the fourth mating portion may be integrally formed with the adaptor.

Fig. 8 is a partially enlarged perspective view showing an embodiment of the adaptor, wherein a fifth fitting portion 25 is provided on the first swirler 21, a sixth fitting portion 16 is provided in the mounting hole 10, and the first swirler 21 is fitted by the fifth fitting portion 25 and the sixth fitting portion to be detachably fitted in the mounting hole 10.

Specifically, fig. 9 shows a schematic perspective view of an embodiment of the first swirler in an unassembled state with the adapter, and fig. 10 shows a schematic cross-sectional view of an embodiment of the first swirler in an assembled state with the adapter. Please refer to fig. 5 and fig. 8 to 10. In one embodiment of the swirler assembly, the first swirler 21 has a first flange 211 and a first mounting edge 212, a circumferential catch 213 is formed between the first flange 211 and the first mounting edge 212, the mounting hole 10 has a second flange 101, and the opening 100 is formed between the second flanges 101. The circumferential engaging groove 213 is the fifth engaging portion 25, and the second flange 101 is the sixth engaging portion 16. The opening 100 allows the first flange 211 to enter, and after the first flange 211 enters the opening 100, the first swirler 21 is rotated so that its second flange 101 snaps into the circumferential groove 213 for mating engagement as shown in fig. 10. In other embodiments different from those shown in the drawings, the fifth mating portion may be a convex portion, and the sixth mating portion may be a slot.

In an embodiment of the swirler assembly, an axial gap is provided between the circumferential clamping groove 213 and the second flange 101 to ensure that the swirler 2 can float freely on the adaptor 1, and in an embodiment of the swirler assembly, a radial gap is provided between the circumferential clamping groove 213 and the second flange 101 to ensure that the swirler 2 can float freely on the adaptor 1, and the mounting of the swirler on the adaptor should have a floating function, so that the mounting of the fuel nozzle and the functions of absorbing thermal deformation mismatch and the like can be ensured, and meanwhile, the assembly is convenient. During assembly, the swirlers are generally installed on the head portions of the flame tubes in a one-to-one correspondence mode with the fuel nozzles, however, in the assembly sequence, the swirlers are firstly fixed on the head portion switching sections of the flame tubes, the fuel nozzles are inserted into the installed flame tubes from corresponding installation holes of the casing, the fuel nozzles are matched with the inner diameters of the swirlers, and in order to avoid leakage, the matching gap between the fuel nozzles and the swirler is small. When the nozzle is installed, the flame tube and the swirler cannot be seen from the outside of the combustion chamber casing, so that the fuel nozzle is blind-mounted in the internal installation process, a proper floating gap is reserved on the swirler in the head rotation stage of the flame tube for ensuring smooth installation, and the floating gap design of the swirler can also absorb relative displacement caused by mismatching of the thermal deformation of the flame tube and the nozzle.

As fig. 5 and 8 to 10 only show the assembly of the first cyclone with the adaptor, it will be appreciated that the second cyclone may be assembled with the adaptor in the same manner.

The swirler assembly as in one or more of the previous embodiments may be used in a combustor including, but not limited to, the one shown in FIG. 2, the swirler assembly being mounted to a combustor basket head in the combustor.

The combustor as in one or more of the previous embodiments may be used in a gas turbine.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims

1. A swirler assembly comprises an adapter and a plurality of swirlers, wherein the adapter is used for mounting the swirlers on a flame tube head and is provided with an annular mounting surface, a plurality of mounting holes are formed in the annular mounting surface, and the swirlers are detachably mounted in the mounting holes;

characterized in that the swirler comprises:

a plurality of first cyclones having a first fitting portion; and

a plurality of second cyclones having second fitting portions;

2. The swirler assembly according to claim 1, wherein the number of swirlers is an even number, and the first and second swirlers are provided with the first and second engaging portions that engage with each other on side walls on sides adjacent to each other, respectively;

3. The swirler assembly of claim 2,

for any of the first cyclones, the first cooperating portion on one side thereof cooperates with the second cooperating portion of the second cyclone adjacent thereto on that side to restrict rotation of the first cyclone in a first direction; the first matching part on the other side of the first swirler is matched with the second matching part of the second swirler adjacent to the first swirler on the other side of the first swirler to limit the first swirler to rotate along a second direction;

4. The swirler assembly of claim 3, wherein the first mating portion is a first protrusion disposed on each side of the first swirler and the second mating portion is a second protrusion disposed on each side of the second swirler.

5. The swirler assembly of claim 1, wherein the swirlers are odd in number and have a pair of two first swirlers or two second swirlers disposed adjacent to each other, and the sides adjacent to each other are not provided with the first engaging portion or the second engaging portion;

6. The swirler assembly of claim 1, wherein the third mating portion is a third lug and the fourth mating portion is a platen member having a slot that mates with the mating groove;

wherein, the clamp plate spare with adapter can dismantle the connection.

7. The swirler assembly of claim 1, wherein the swirler has a fifth mating portion and the mounting hole has a sixth mating portion, and wherein the swirler is removably mounted in the mounting hole via the fifth mating portion and the sixth mating portion.

8. The swirler assembly of claim 7, wherein the swirler has a first circumferentially disposed flange and a first mounting edge, a circumferential catch is formed between the first flange and the first mounting edge, a second flange is disposed in the mounting hole, and an opening is formed between the second flanges;

9. The swirler assembly of claim 8, wherein in an assembled state, the circumferential catch and the second flange have an axial gap therebetween.

10. A combustor comprising a liner, fuel injector, combustor casing and diffuser, wherein the liner head mounts a swirler assembly as claimed in any one of claims 1 to 9.

11. A gas turbine comprising the combustor of claim 10.