CN113739203A

CN113739203A - Cap assembly for a combustor

Info

Publication number: CN113739203A
Application number: CN202111070713.1A
Authority: CN
Inventors: 刘小龙; 邵健; 王菁菁; 吕煊
Original assignee: China United Heavy Gas Turbine Technology Co Ltd
Current assignee: China United Heavy Gas Turbine Technology Co Ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2021-12-03
Anticipated expiration: 2041-09-13
Also published as: CN113739203B

Abstract

The invention discloses a hood assembly for a combustor, which comprises a connecting flange and a hood, wherein the connecting flange is arranged on an end cover of the hood assembly for the combustor, a connecting piece is arranged on the connecting flange and extends along the direction far away from the end cover, the hood is connected with one end, far away from the end cover, of the connecting piece, and the hood and the connecting flange are arranged at intervals in the extending direction of the connecting piece. The connecting piece of the hood assembly for the combustor has high rigidity, is not easy to crack, and can stably support the hood.

Description

Cap assembly for a combustor

Technical Field

The invention relates to the technical field of combustor equipment, in particular to a hood assembly for a combustor.

Background

The cap is a component of the gas turbine combustor head, located upstream of the liner, forming the front face of the combustion zone. The hood in the related art is installed on a combustor lock through an installation flange, and a connecting plate is arranged in front of a connecting flange and the hood to support the hood, however, a supporting plate in the related art can resonate under the excitation of combustion pulsating pressure, so that the problem of cracking of the supporting piece occurs, the rigidity of the supporting piece is low, and the supporting of the hood is unstable.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides the hood assembly for the combustor, the connecting piece of the hood assembly for the combustor has high rigidity and is not easy to crack, and the connecting piece supports the hood stably.

A cap assembly for a combustor according to an embodiment of the present invention includes: the connecting flange is arranged on an end cover of the combustor, a connecting piece is arranged on the connecting flange, and the connecting piece extends along the direction far away from the end cover; the hood, the hood with the connecting piece is kept away from the one end of end cover is connected, just the hood with flange is in the extending direction of connecting piece is last interval arrangement.

According to the hood assembly for the combustor, the connecting flange is arranged on the end cover of the combustor, the connecting piece extending towards the end cover is arranged on the connecting flange, the hood is connected to one end, far away from the end cover, of the connecting piece, the distance between the connecting flange and the hood can be increased, accordingly, a large temperature difference between the connecting flange and the hood can be allowed, excessive thermal stress is not generated, the thickness of the connecting piece does not need to be reduced, the rigidity of the connecting piece is guaranteed, resonance cracking of the connecting piece is avoided, and the connecting piece can stably support the hood.

In some embodiments, the connecting member is a plurality of connecting members, and the plurality of connecting members are arranged at intervals in the circumferential direction of the connecting flange.

In some embodiments, the cap comprises a cap outer cylinder and a cap panel, the cap panel is connected to one end of the cap outer cylinder far away from the connecting flange, and the connecting piece is connected with the outer peripheral wall of the cap outer cylinder.

In some embodiments, the outer peripheral wall of the cap outer cylinder is provided with an annular protrusion.

In some embodiments, the cap further includes a central cap cylinder and a plurality of peripheral cap cylinders, the central cap cylinder and the plurality of peripheral cap cylinders are both disposed in the cap outer cylinder, the plurality of peripheral cap cylinders surround the periphery of the central cap cylinder and are arranged at intervals in the circumferential direction of the central cap cylinder, the cap assembly for the combustor has a central nozzle and a plurality of peripheral nozzles, the central nozzle is disposed in the central cap cylinder, the plurality of peripheral nozzles are opposite to the plurality of peripheral cap cylinders, and each peripheral nozzle is disposed in the corresponding peripheral cap cylinder.

In some embodiments, the cap further comprises a support, one end of the support is connected with the cap outer cylinder, and the other end of the support is connected with the central cover cylinder to support the central cover cylinder.

In some embodiments, the support is a plurality of supports, and the plurality of supports are arranged at intervals in the circumferential direction of the cap outer cylinder.

In some embodiments, the connector is a helical strip.

In some embodiments, the hood panel is provided with a plurality of sound-deadening chambers, and the plurality of sound-deadening chambers are arranged at intervals in a radial direction of the hood panel.

Drawings

FIG. 1 is a schematic structural view of a cap assembly for a combustor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a cap assembly for a combustor according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a cap assembly for a combustor showing a center nozzle and a peripheral nozzle in accordance with an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a cap assembly for a combustor showing a support according to an embodiment of the present invention.

FIG. 5 is a schematic structural view of a cap assembly for a combustor according to another embodiment of the present invention.

FIG. 6 is a partial structural schematic view of a cap assembly for a combustor according to an embodiment of the present invention, wherein a muffling chamber is shown.

FIG. 7 is a cross-sectional view of a cap assembly for combustion in accordance with an embodiment of the present invention, wherein the cross-sectional shape of the muffling chamber is shown.

Reference numerals:

an end cap 101; a peripheral nozzle 102; a central nozzle 103; a hood 104; a connecting flange 110; a connecting member 111; a support 112; a hood panel 113; a peripheral shroud 114; a center shield cylinder 115; an annular projection 116; a cap outer cylinder 117; a sound-deadening chamber 118.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 7, a cap assembly for a combustor according to an embodiment of the present invention includes a connection flange 110 and a cap 104.

As shown in fig. 3 and 4, the connection flange 110 is mounted on the end cover 101 of the combustor, the connection flange 110 is provided with a connection piece 111, the connection piece 111 extends in a direction away from the end cover 101, the cap 104 is connected with one end of the connection piece 111 away from the end cover 101, and the cap 104 and the connection flange 110 are arranged at an interval in the extending direction of the connection piece 111. It will be appreciated that the connector 111 is used to support and secure the cap 104 and that a greater distance between the connection flange 110 and the cap 104 is possible due to the cap 104 being connected at the end of the connector 111 remote from the end cap 101. Preferably, as shown in fig. 5, the connecting member 111 is a spiral shaped plate.

The inventor finds that the hood in the related art is positioned at the inner hole of the connecting flange, and the hood is connected with the connecting flange through the connecting plate, so that the thickness of the connecting plate needs to be reduced in order to reduce the thermal stress generated by the temperature difference between the inside and the outside, but the rigidity of the connecting plate is reduced due to the fact that the connecting plate is thin, resonance is easy to occur under the excitation of combustion pulsating pressure, and the connecting plate is cracked.

Based on the above problems, the distance between the cap 104 and the connecting flange 110 is increased by changing the relative position of the cap 104 and the connecting flange 110, so that a large temperature difference is allowed to exist between the connecting flange 110 and the cap 104, and excessive thermal stress is not generated, the connecting piece 111 does not need to be thinned, the rigidity of the connecting piece 111 is ensured, and the cap 104 is stably supported.

According to the hood assembly for the combustor, the connecting flange is arranged on the end cover, the connecting piece extending towards the end cover is arranged on the connecting flange, the hood is connected to one end, far away from the end cover, of the connecting piece, the distance between the connecting flange and the hood can be increased, accordingly, a large temperature difference between the connecting flange and the hood can be allowed, excessive thermal stress is not generated, the thickness of the connecting piece does not need to be reduced, the rigidity of the connecting piece is guaranteed, resonance cracking of the connecting piece is avoided, and the connecting piece can stably support the hood.

Further, as shown in fig. 3, the connecting member 111 is provided in plurality, and the plurality of connecting members 111 are arranged at intervals in the circumferential direction of the connecting flange 110, so that the stability and reliability of the support of the connecting member 111 to the hood 104 can be improved.

Further, as shown in fig. 4, the cap 104 includes a cap outer cylinder 117 and a cap panel 113, the cap panel 113 is connected to an end of the cap outer cylinder 117 away from the connecting flange 110, and the connecting member 111 is connected to an outer peripheral wall of the cap outer cylinder 117.

Further, as shown in fig. 4, an annular protrusion 116 is provided on the outer peripheral wall of the cap outer cylinder 117, so that the annular protrusion 116 absorbs part of the thermal expansion deformation of the cap panel 113 due to high temperature, thereby improving the service life of the cap 104. Specifically, the annular projection 116 may be plural, and the plural annular projections 116 are arranged at intervals in the extending direction of the connecting member 111.

Further, as shown in fig. 1 to 4, the cap 104 further includes a central cap barrel 115 and a plurality of peripheral cap barrels 114, the central cap barrel 115 and the plurality of peripheral cap barrels 114 are disposed in the cap outer barrel 117, the plurality of peripheral cap barrels 114 surround the periphery of the central cap barrel 115 and are arranged at intervals in the circumferential direction of the central cap barrel 115, the cap assembly for the combustor has a central nozzle 103 and a plurality of peripheral nozzles 102, the central nozzle 103 is disposed in the central cap barrel 115, the plurality of peripheral nozzles 102 are opposite to the plurality of peripheral cap barrels, and each peripheral nozzle 102 is disposed in the corresponding peripheral cap barrel 114.

Further, as shown in fig. 3 and 4, the cap 104 further includes a support 112, one end of the support 112 is connected to the cap outer cylinder 117, and the other end of the support 112 is connected to the center cap cylinder 115 to support the center cap cylinder 115. Thus, the support 112 may serve to secure and stiffen the center housing barrel 115.

Further, the support 112 is plural, and the plural supports 112 are arranged at intervals in the circumferential direction of the cap outer cylinder 117, so that the stability and reliability of the support of the center cap cylinder 115 by the supports 112 can be improved.

In addition, as shown in fig. 6 and 7, a sound-deadening chamber 118 may be further provided on the hood panel 113 to absorb vibration noise. Specifically, the sound deadening chamber 118 is plural and arranged at intervals in the radial direction of the hood panel 113. Preferably, sound-deadening chamber 118 is located between adjacent peripheral shrouds 114.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A cap assembly for a combustor, comprising:

the connecting flange is arranged on an end cover of the combustor, a connecting piece is arranged on the connecting flange, and the connecting piece extends along the direction far away from the end cover;

the hood, the hood with the connecting piece is kept away from the one end of end cover is connected, just the hood with flange is in the extending direction of connecting piece is last interval arrangement.

2. The cap assembly for a combustor as in claim 1, wherein the connecting member is a plurality of the connecting members arranged at intervals in a circumferential direction of the connecting flange.

3. The cap assembly for a burner of claim 2, wherein the cap includes a cap outer barrel and a cap panel connected to an end of the cap outer barrel remote from the connection flange, the connector being connected to the outer peripheral wall of the cap outer barrel.

4. The cap assembly for a burner of claim 3, wherein the outer peripheral wall of the outer cap barrel is provided with an annular protrusion.

5. The cap assembly for a combustor as claimed in claim 1, further comprising a central cap barrel and a plurality of peripheral cap barrels each disposed in the cap outer barrel, the plurality of peripheral cap barrels surrounding an outer periphery of the central cap barrel and arranged at intervals in a circumferential direction of the central cap barrel, the cap assembly for a combustor having a central nozzle and a plurality of peripheral nozzles, the central nozzle being disposed in the central cap barrel, the plurality of peripheral nozzles being opposed to the plurality of peripheral cap barrels, and each of the peripheral nozzles being disposed in the corresponding peripheral cap barrel.

6. The cap assembly for a combustor as in claim 5, further comprising a support member having one end connected to the cap outer cylinder and another end connected to the center cap cylinder to support the center cap cylinder.

7. The cap assembly for a combustor as in claim 6, wherein the support is a plurality of supports, the plurality of supports being arranged at intervals in a circumferential direction of the cap outer cylinder.

8. The cap assembly for a combustor as in claim 2, wherein the connector is a helical strip.

9. The cap assembly for a combustor according to claim 1, wherein a plurality of muffling chambers are provided on the cap panel, the plurality of muffling chambers being arranged at intervals in a radial direction of the cap panel.