CN112197297A

CN112197297A - Mounting component for covering heat insulation layer on combustion chamber shell and combustion chamber

Info

Publication number: CN112197297A
Application number: CN202011204053.7A
Authority: CN
Inventors: 张山子; 沈存五; 沈逸文; 何磊
Original assignee: Shanghai Electric Gas Turbine Co ltd
Current assignee: Shanghai Electric Gas Turbine Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-01-08

Abstract

The invention provides a mounting member for covering a heat insulating layer on a combustion chamber shell and a combustion chamber, comprising: a fixing plate fastened to the combustion chamber housing; the turning connecting plate is connected with the fixing plate; the bending clamping plate comprises a stop plate part and a hooking plate part which are connected in an angle mode, the stop plate part is connected with the turning connecting plate and used for abutting against the peripheral side of the heat insulation tile block, and the hooking plate part is used for hooking the outer groove wall of the groove; the invention can prevent hot gas in the combustion chamber from directly blowing to the bent clamping plate through the gap between two adjacent heat insulation tiles, prevent the hot gas in the combustion chamber from eroding the bent clamping plate and prolong the service life of the installation component.

Description

Mounting component for covering heat insulation layer on combustion chamber shell and combustion chamber

Technical Field

The invention relates to the technical field of gas turbines, in particular to a mounting component for covering a heat insulation layer on a combustion chamber shell and a combustion chamber.

Background

The combustion process of a gas turbine occurs within the combustor casing, which, due to its operation in a high temperature environment, requires the addition of refractory material inside the casing to achieve thermal insulation. The insulation layer made of refractory material is generally constituted by a plurality of lamellar tiles arranged circumferentially around the axis of the rotor and covering the inner wall of the casing of the combustion chamber. In general, the sheet-like tiles are fastened to the shell by means of support members. The existing support member is a bent plate, one end of which is joined to a sheet-like tile and the other end of which has a mounting area for connection to the housing.

In order to avoid that adjacent tile tiles are pressed against each other due to thermal expansion during actual use, a gap exists between the adjacent tile tiles. However, hot gases can penetrate through this gap between the housing and the insulation layer and reach the arrangement of the support component, with the result that the support component is highly susceptible to significant wear. For example, the location where the support member contacts the tile is the most direct and most susceptible to high temperatures, where it is susceptible to oxidation and possible fracture failure. In addition, excessive temperatures may cause creep and relaxation of the support member due to thermal tack of the material, which may lead to failure of the fastened state.

The prior patent "support element for insulating tiles for gas turbine combustors" (grant No. CN107208892B, grant No. 20191126) proposes a structure of support element in which the outer surface of the joint of the support element is coated with a protective coating to reduce the service temperature of the joint of the support element. It introduces a protective coating on the support member, which substantially increases manufacturing costs and process requirements. As another example, the prior patent "fixing member for fixing a heat shield block to a support structure" (application publication No. CN103968422A, application publication No. 20140806) proposes a fixing member for fixing a heat shield block, which is capable of fixing a heat shield block to a support structure particularly reliably, but which does not take into account the effect of hot gas leakage, which greatly increases the risk of failure.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a mounting member and a combustion chamber for covering a heat insulation layer on a casing of the combustion chamber, which can prevent hot gas in the combustion chamber from directly blowing to a buckling and holding plate through a gap between two adjacent heat insulation tiles, prevent the hot gas in the combustion chamber from corroding the buckling and holding plate, and prolong the service life of the mounting member.

In order to solve the above technical problems, the present invention provides an installation component for covering a thermal insulation layer on a combustion chamber shell, the thermal insulation layer is formed by splicing a plurality of thermal insulation tiles at intervals, a groove is formed on a peripheral side of each thermal insulation tile, two side groove walls of the groove are respectively an outer groove wall close to the combustion chamber shell and an inner groove wall far away from the combustion chamber shell, and the installation component comprises:

a fixing plate fastened to the combustion chamber housing;

the turning connecting plate is connected with the fixing plate;

the bending clamping plate comprises a stop plate part and a hooking plate part which are connected in an angle mode, the stop plate part is connected with the turning connecting plate and used for abutting against the peripheral side of the heat insulation tile block, and the hooking plate part is used for hooking the outer groove wall of the groove;

the semi-suspended baffle protection plate in the groove is connected with the edge of the hooking plate part to prevent hot gas from eroding the bent clamping plate after flowing through a gap between adjacent heat insulation tiles.

Preferably, the extended surface of the flow blocking prevention plate is larger than the extended surface of the hooking plate portion.

Preferably, the combustion chamber shell is provided with a mounting groove; the fixed plate comprises a bearing plate inserted in the mounting groove and a bending increasing sheet for driving the bearing plate to bend due to heating.

Preferably, the bending-increasing fins are arranged on the side of the carrier plate facing away from the combustion chamber housing, the carrier plate being made of a first metal material having a first coefficient of expansion, and the bending-increasing plate being made of a second metal material having a second coefficient of expansion, which is different from the first coefficient of expansion.

Preferably, the first metal material and the second metal material are both nickel-based alloys.

Preferably, the cross section of the mounting groove is in a three-level boss structure, and the mounting groove comprises a wide groove part, a middle groove part and a narrow groove part, wherein the groove widths of the wide groove part, the middle groove part and the narrow groove part are sequentially reduced along the groove depth direction; the bearing plate comprises a fastening section and an adaptive section, the plate width of the fastening section and the plate width of the adaptive section are sequentially reduced along the length direction, the fastening section is fixed in the wide groove part, and the adaptive section is located in the middle groove part; the turning connecting plate is connected with the adaptive section through the narrow groove part.

Preferably, an edge of the baffle plate, which is away from the groove bottom groove wall, is bent in a direction toward the combustor casing and extends in a direction parallel to the baffle plate portion.

Preferably, the fixing plate, the inflection connecting plate, the buckling and clamping plate and the flow blocking protection plate are integrally formed or welded with each other.

The invention also provides a combustion chamber, which comprises a combustion chamber shell, a heat insulation layer and the mounting component for covering the heat insulation layer on the combustion chamber shell.

Preferably, the combustion chamber shell is provided with an installation groove for fastening the fixing plate and a cooling gas channel communicated with the installation groove; the two mounting components located in the same gap between every two adjacent heat insulation tiles are symmetrically arranged, the fixing plates of the two mounting components and the combustion chamber shell jointly define a gas gathering cooling cavity, the turning direction connecting plates of the two mounting components are in clearance fit to form a gas transmission cooling channel, and the bending clamping plates and the flow blocking protection plates of the two mounting components surround to form a protective cooling cavity.

As described above, the mounting member for covering the heat insulating layer on the combustion chamber casing and the combustion chamber according to the present invention have the following advantageous effects: the bending clamping plate is connected with the fixed plate through the turning connecting plate and comprises a stop plate part and a hooking plate part, the stop plate part is connected with the turning connecting plate and used for abutting the peripheral side of the heat insulation tile block, and the hooking plate part is used for hooking the outer groove wall of the groove. Importantly, the edge of the blocking and flow-preventing plate and the edge of the hooking plate part are connected and are suspended in the groove in a half mode, so that hot gas can be prevented from directly blowing to the bending and clamping plate through a gap between two adjacent heat-insulating tiles, the failure of the bending and clamping plate due to the fact that the bending and clamping plate bears high temperature is avoided, the hot gas in the combustion chamber is prevented from corroding the bending and clamping plate, and the service life of the installation component is prolonged.

Drawings

FIG. 1 shows a partial cross-sectional view of a combustor of the present invention;

FIG. 2 is a view showing a state of use of the mounting member for covering the casing of the combustion chamber with the insulation layer according to the present invention;

FIG. 3 is a schematic view of the mounting structure for covering the casing of the combustor with the insulation according to the present invention;

FIG. 4 shows a side view of a first embodiment of a mounting member for covering a combustion chamber housing with insulation;

FIG. 5 shows a side view of a second embodiment of a mounting member for covering a combustion chamber housing with insulation;

fig. 6 shows a side view of a third embodiment of a mounting member for covering a combustion chamber housing with a thermal insulation layer.

Description of the element reference numerals

1 insulating layer

11 Heat insulation tile

111 groove

111a outer groove wall

111b inner groove wall

12 gap

2 combustion chamber housing

21 mounting groove

22 cooling gas channel

3 fixing plate

31 bearing plate

311 fastening segment

312 adaptive section

32 increasing bending piece

4-turn joint plate

5 bending and holding plate

51 stop plate part

52 hook plate part

6 keep off a class guard plate

61 wing

7 gather gas cooling cavity

8 gas transmission cooling channel

9 protective cooling cavity

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1 to 6, the present invention provides a combustor including a combustor case 2 and a thermal insulation layer 1 and a mounting member for covering the thermal insulation layer to the combustor case. The insulation layer 1 is formed by a plurality of insulation tiles 11 that are joined together at intervals, i.e. a gap 12 exists between two adjacent insulation tiles 11 (hot gas in the combustion chamber can flow into the space between the combustion chamber housing 2 and the insulation layer 1 through the gap 12). The peripheral side of the heat insulation tile 11 is provided with a groove 111, the two side groove walls of the groove 111 are respectively an outer groove wall 111a close to the combustion chamber shell 2 and an inner groove wall 111b far away from the combustion chamber shell 2,

as shown in fig. 3 to 6, the mounting member for covering the heat insulating layer on the combustion chamber casing includes:

a fixing plate 3 fastened to the combustion chamber housing 2;

the turning connecting plate 4 is connected with the fixing plate 3;

the bending and clamping plate 5, the bending and clamping plate 5 comprises a stop plate part 51 and a hooking plate part 52 which are connected in an angle mode, the stop plate part 51 is connected with the inflection connecting plate 4 and is used for abutting against the peripheral side of the heat insulation tile 11, and the hooking plate part 52 is used for hooking the outer groove wall 111a of the groove 111;

and the baffle protection plate 6 is half suspended in the groove 111, and the baffle protection plate 6 is connected with the edge of the hook plate part 52 to prevent hot gas from eroding the bent clamping plate 5 after flowing through the gap between the adjacent heat insulation tiles 11.

In the present invention, the buckling and holding plate 5 is connected to the fixing plate 3 through the inflection connecting plate 4, the buckling and holding plate 5 includes a stopper plate portion 51 and a hooking plate portion 52 which are connected at an angle, the stopper plate portion 51 is connected to the inflection connecting plate 4 and is used for abutting against the peripheral side of the heat insulation tile 11, and the hooking plate portion 52 is used for hooking the outer groove wall 111a of the groove 111. Importantly, the edge of the baffle protection plate 6 and the edge of the hook plate portion 52 are connected and are half suspended in the groove 111, so that hot gas can be prevented from directly blowing to the buckling and clamping plate 5 through the gap 12 between two adjacent heat insulation tiles 11, failure of the buckling and clamping plate 5 due to high temperature bearing is avoided, the buckling and clamping plate 5 is prevented from being corroded by the hot gas in the combustion chamber, and the service life of the installation component is prolonged.

As shown in fig. 3, in order to improve the protection effect of the baffle plate 6 on the buckling plate 5, the extension surface of the baffle plate 6 is larger than the extension surface of the hook plate portion 52. Specifically, the dimension of the flow blocking protection plate 6 in the extending direction of the groove 111 is larger than the dimension of the hooking plate portion 52 in the extending direction of the groove 111, and the part of the flow blocking protection plate 6 extending out of the hooking plate portion 52 in the extending direction of the groove 111 forms the protection wing 61, so that the protection range of the flow blocking protection plate 6 can be enlarged.

As shown in fig. 2, in order to fix the mounting member to the inner wall of the combustion chamber housing 2, a mounting groove 21 is provided on the combustion chamber housing 2; the fixing plate 3 includes a supporting plate 31 inserted into the mounting groove 21 and a bending increasing piece 32 for driving the supporting plate 31 to bend due to heat. When the temperature of the fixing plate 3 rises, the whole fixing plate 3 is convexly bent toward the combustion chamber housing 2 due to the different expansion degrees of the loading plate 31 and the bending-increasing fins 32, so as to prevent the hooking plate portion 52 of the bending-retaining plate 5 from slipping off the groove 111 of the heat-insulating tile 11.

Furthermore, the bending-increasing piece 32 is provided on the side of the carrying plate 31 facing away from the combustion chamber housing 2, the carrying plate 31 is made of a first metal material having a first coefficient of expansion, and the bending-increasing piece 32 is made of a second metal material having a second coefficient of expansion different from the first coefficient of expansion.

Furthermore, the nickel-based alloy is an alloy with comprehensive properties such as high strength, certain oxidation and corrosion resistance and the like at a high temperature of 650-1000 ℃, and the first metal material and the second metal material are both nickel-based alloys.

As shown in fig. 2 and 3, in order to facilitate the mounting and dismounting of the mounting member, the cross-sectional shape of the mounting groove 21 is a three-step boss structure, and the mounting groove 21 includes a wide groove portion, a middle groove portion, and a narrow groove portion, in which the groove widths become smaller in the groove depth direction; the bearing plate 31 includes a fastening section 311 and an adaptive section 312, the plate widths of which are sequentially reduced along the length direction, the fastening section 311 is fixed in the wide groove portion, and the adaptive section 312 is located in the middle groove portion (the adaptive section 312 can be bent and deformed in the middle groove portion); the inflected connector plates 4 are connected to the compliant section 312 via narrow slot portions.

As shown in fig. 5, in order to improve the protection effect of the baffle plate 6 against the buckling-catching plate 5, one side of the baffle plate 6, which is away from the bottom wall of the recess 111, is bent in a direction toward the combustor casing 2 and extends in a direction parallel to the baffle plate portion 51.

The fixing plate 3, the turning connecting plate 4, the bending clamping plate 5 and the flow blocking protection plate 6 are integrally formed or welded with each other. As shown in fig. 4, the fixing plate 3, the inflection direction engaging plate 4, the buckling holding plate 5 and the flow blocking prevention plate 6 are integrally formed. As shown in fig. 5, the fixing plate 3, the inflection connecting plate 4 and the buckling holding plate 5 are integrally formed, and the flow blocking prevention plate 6 and the buckling holding plate 5 are welded to each other.

As shown in fig. 1, the present invention also provides a combustion chamber, in which a mounting groove 21 for fastening a fixing plate 3 and a cooling gas passage 22 communicated with the mounting groove 21 are provided on a combustion chamber housing 2; two mounting components located in the same gap between two adjacent heat insulation tiles 11 are symmetrically arranged, fixing plates 3 of the two mounting components and a combustion chamber shell 2 jointly define a gas gathering cooling cavity 7, turning joint plates 4 of the two mounting components are in clearance fit to form a gas transmission cooling channel 8, and bending clamping plates 5 and flow blocking protection plates 6 of the two mounting components surround to form a protective cooling cavity 9.

In the operation process of the combustion chamber, cooling gas firstly enters the gas-gathering cooling cavity 7 between the combustion chamber shell 2 and the heat-insulating layer 1 through the cooling gas channel 22 arranged on the combustion chamber shell 2 to cool the fixing plate 3 and the inflection connecting plate 4; then flows through the gas transmission cooling channel 8; then flows into the protective cooling cavity 9, so that the cooling gas can effectively cool the bent clamping plate 5; finally, the cooling gas flows into the combustion chamber through the gap 12 between two adjacent heat insulation tiles 11.

In summary, the mounting member for covering the heat insulation layer on the casing of the combustion chamber and the combustion chamber of the present invention can prevent the hot gas in the combustion chamber from directly blowing to the bent clamping plate 5 through the gap 12 between two adjacent heat insulation tiles 11, so as to prevent the hot gas in the combustion chamber from eroding the bent clamping plate 5, and improve the service life of the mounting member. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides an installation component for inciting somebody to action insulating layer covers in combustion chamber casing, insulating layer (1) is formed by a plurality of thermal-insulated tile (11) clearance concatenations, offers on the periphery side of thermal-insulated tile (11) fluted (111), and two side cell walls of recess (111) are outer cell wall (111a) that are close to combustion chamber casing (2) and interior cell wall (111b) of keeping away from combustion chamber casing (2) respectively, its characterized in that, the installation component includes:

a fixing plate (3) fastened to the combustion chamber housing (2);

the turning connecting plate (4), the turning connecting plate (4) is connected with the fixing plate (3);

the bending and clamping plate (5), the bending and clamping plate (5) comprises a stop plate part (51) and a hooking plate part (52) which are connected in an angle mode, the stop plate part (51) is connected with the inflection connecting plate (4) and is used for being abutted to the peripheral edge side of the heat insulation tile block (11), and the hooking plate part (52) is used for being hooked with the outer groove wall (111a) of the groove (111);

the semi-suspended baffle protection plate (6) in the groove (111), the baffle protection plate (6) is connected with the edge of the hooking plate part (52) to prevent hot gas from eroding the bent clamping plate (5) after flowing through a gap between adjacent heat insulation tiles (11).

2. A mounting member for covering an insulation layer to a combustion chamber casing according to claim 1, wherein: the extending surface of the flow blocking protective plate (6) is larger than the extending surface of the hooking plate part (52).

3. A mounting member for covering an insulation layer to a combustion chamber casing according to claim 1, wherein: the combustion chamber shell (2) is provided with a mounting groove (21); the fixing plate (3) comprises a bearing plate (31) inserted in the mounting groove (21) and a bending increasing sheet (32) for driving the bearing plate (31) to bend due to heating.

4. A mounting member for covering an insulation layer to a combustion chamber casing according to claim 3, wherein: the bending-increasing sheet (32) is arranged on the side of the carrying plate (31) facing away from the combustion chamber housing (2), the carrying plate (31) is made of a first metal material having a first coefficient of expansion, and the bending-increasing sheet (32) is made of a second metal material having a second coefficient of expansion different from the first coefficient of expansion.

5. The mounting member for covering an insulation layer on a casing of a combustion chamber as set forth in claim 4, wherein: the first metal material and the second metal material are both nickel-based alloys.

6. A mounting member for covering an insulation layer to a combustion chamber casing according to claim 3, wherein: the cross section of the mounting groove (21) is of a three-stage boss structure, and the mounting groove (21) comprises a wide groove part, a middle groove part and a narrow groove part, wherein the groove widths of the wide groove part, the middle groove part and the narrow groove part are sequentially reduced along the groove depth direction; the bearing plate (31) comprises a fastening section (311) and an adaptive section (312), the plate widths of the fastening section (311) and the adaptive section (312) are sequentially reduced along the length direction, the fastening section (311) is fixed in the wide groove part, and the adaptive section (312) is located in the middle groove part; the turning connecting plate (4) is connected with the adaptive section (312) through a narrow groove part.

7. A mounting member for covering an insulation layer to a combustion chamber casing according to claim 1, wherein: one side of the flow blocking protective plate (6) far away from the bottom groove wall of the groove (111) is bent towards the direction of the combustion chamber shell (2) and extends towards the direction parallel to the blocking plate part (51).

8. A mounting member for covering an insulation layer to a combustion chamber casing according to claim 1, wherein: the fixing plate (3), the turning connecting plate (4), the bending clamping plate (5) and the flow blocking protection plate (6) are integrally formed or welded with each other.

9. A combustion chamber, characterized by: comprising a combustion chamber housing (2), an insulation (1) and a mounting means for covering the combustion chamber housing with the insulation according to claim 1.

10. The combustor of claim 9, wherein: the combustion chamber shell (2) is provided with an installation groove (21) for fastening the fixing plate (3) and a cooling gas channel (22) communicated with the installation groove (21); two mounting components located in the same gap between two adjacent heat insulation tiles (11) are symmetrically arranged, a fixing plate (3) of the two mounting components and a combustion chamber shell (2) jointly define a gas gathering cooling cavity (7), turning directions of the two mounting components are in clearance fit with a connecting plate (4) to form a gas transmission cooling channel (8), and bending clamping plates (5) and a flow blocking protection plate (6) of the two mounting components surround to form a protective cooling cavity (9).