CN115095395A - Gas turbine air guide casing inner cylinder with double combustion chambers - Google Patents
Gas turbine air guide casing inner cylinder with double combustion chambers Download PDFInfo
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- CN115095395A CN115095395A CN202210900301.4A CN202210900301A CN115095395A CN 115095395 A CN115095395 A CN 115095395A CN 202210900301 A CN202210900301 A CN 202210900301A CN 115095395 A CN115095395 A CN 115095395A
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- inner cylinder
- cylinder body
- guide plate
- combustion chamber
- casing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/26—Double casings; Measures against temperature strain in casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an inner cylinder of a gas turbine air guide casing with double combustion chambers, belonging to the technical field of gas turbines. The problem of the flow field that the high-temperature gas of the inner cylinder of the combustion chamber bleed air casing enters the turbine is uneven is solved. The guide plate device comprises an inner cylinder body, a lower guide plate and an upper guide plate, wherein the left side and the right side of the lower guide plate are connected with the lower part of the inner cylinder body, the axial two sides of the lower guide plate are provided with a lower gap with the inner cylinder body, the left side and the right side of the upper guide plate are connected with the upper part of the inner cylinder body, and the axial two sides of the upper guide plate are provided with an upper gap with the inner cylinder body. The upper gap and the lower gap reduce dead angles, so that the air flow is uniform, the temperatures of the upper guide plate and the lower guide plate are reduced, and the flow loss is avoided.
Description
Technical Field
The invention relates to an inner cylinder of an air guide casing of a gas turbine, and belongs to the technical field of gas turbines.
Background
In the current gas turbine, the combustion chamber is usually transversely arranged and is arranged in the casing, but the structure of the air guide casing which needs to be vertically arranged is very rare for some special conditions, such as the combustion chamber test. And the edges of the lower guide plate and the upper guide plate in the air entraining case inner cylinder are welded with the inner wall of the inner cylinder, so that dead angles are easily formed, gas is retained, the gas in the inner cylinder flows unevenly, the flow field of high-temperature gas in the combustion chamber air entraining case inner cylinder entering a turbine is uneven, the flow loss is caused, meanwhile, the temperature of the guide plate is far higher than that of other positions around, and the guide plate expands excessively when heated, so that the surrounding cylinder body is extruded.
Therefore, it is desirable to provide a dual combustion chamber gas turbine air guiding casing inner cylinder to solve the above technical problems.
Disclosure of Invention
The invention aims to solve the problem of uneven flow field of high-temperature gas entering a turbine in an inner cylinder of a combustion chamber bleed air casing. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
the utility model provides a gas turbine air guide machine casket inner casing of two combustors, includes inner cylinder body, lower guide plate and goes up the guide plate, the left and right sides of guide plate and the sub-unit connection of inner cylinder body down, the axial both sides of lower guide plate have the lower part clearance with the inner cylinder body, the left and right sides of going up the guide plate is connected with the upper portion of inner cylinder body, and the axial both sides of going up the guide plate have the upper portion clearance with the inner cylinder body.
Preferably, the following components: the inner cylinder body comprises an upper half inner cylinder body and a lower half inner cylinder body, the upper half inner cylinder body is arranged on the upper portion of the lower half inner cylinder body, cylinder body connectors are arranged on the left side and the right side of the upper half inner cylinder body respectively, an upper flow guide plate is arranged in the upper half inner cylinder body, a sewage discharge hole is formed in the bottom of the lower half inner cylinder body, a lower flow guide plate is arranged in the lower half inner cylinder body, and the sewage discharge hole is located below the lower flow guide plate.
Preferably: the left side and the right side of the upper guide plate are connected with the cylinder body interfaces of the upper half inner cylinder body to form a channel with a smooth inner wall.
Preferably: the cross sections of the upper guide plate and the lower guide plate are both V-shaped, the left side and the right side of the lower guide plate are provided with notches, and the notches of the lower guide plate are positioned on the left side and the right side of the sewage draining hole.
Preferably: the width of the lower gap and the upper gap is 3-10 mm.
Preferably: still include the locating pin, the left and right sides of lower half inner cylinder body is provided with the locating pin respectively.
Preferably: the inner cylinder body is in a streamline thin-wall volute structure.
Preferably: the combustion chamber comprises an upper half inner cylinder body and a lower half inner cylinder body, and is characterized by further comprising a transition section and a combustion chamber, wherein cylinder body interfaces of the two upper half inner cylinder bodies are connected with an outlet of the combustion chamber, and an inlet of the combustion chamber is connected with the transition section.
Preferably: the combustion chamber is vertically arranged.
The invention has the following beneficial effects:
1. in the invention, the V-shaped two sides of the upper guide plate and the lower guide plate are of fan-shaped structures, so that gas at the joints of the cylinder bodies on the two sides can be rectified, dead angles are reduced by the upper gaps and the lower gaps, the airflow is heated uniformly, and meanwhile, the phenomenon that the guide plate expands too much when the temperature of the guide plate is far higher than that of the surrounding cylinder bodies, so that the surrounding cylinder bodies are extruded, larger stress concentration is generated at the discontinuous position of connection, the temperatures of the upper guide plate and the lower guide plate are reduced, and the flow loss is avoided;
2. the square notch of the lower guide plate is used for discharging sewage, and the sewage of the inner cylinder body is discharged from the sewage discharge hole through the notch;
3. the invention has good manufacturability and is convenient for installation and maintenance;
4. the invention reduces the stress of the junction positions of the upper guide plate, the lower guide plate and the inner cylinder body.
Drawings
FIG. 1 is a schematic illustration of a dual combustion chamber gas turbine air guide casing inner casing configuration;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a perspective view of a dual combustion chamber gas turbine air guide casing inner casing;
FIG. 4 is a cross-sectional view of a dual combustion chamber gas turbine air guide casing inner cylinder;
fig. 5 is a schematic structural view of an upper baffle;
FIG. 6 is a schematic view of the structure of the lower baffle;
FIG. 7 is a schematic view of the lower clearance;
FIG. 8 is a schematic view of the upper gap;
FIG. 9 is an inner cylinder grid;
FIG. 10 is an inner cylinder load and temperature application;
FIG. 11 is an inner cylinder temperature field;
fig. 12 is upper half inner cylinder temperature;
FIG. 13 is the lower half internal cylinder temperature;
fig. 14 is a graph comparing equivalent stress of the front and rear upper half inner cylinders;
FIG. 15 is a comparison graph of equivalent stress of the lower half cylinder block before and after modification;
FIG. 16 is a lateral and longitudinal displacement of the inner cylinder;
in the figure: 1-a combustion chamber, 2-an upper half inner cylinder body, 3-a lower half inner cylinder body, 4-a lower guide plate, 5-an upper guide plate, 6-a positioning pin, 7-a sewage discharge hole and 8-a transition section.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that this description is made only by way of example and not as a limitation on the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 16, and the gas turbine air guide casing inner cylinder with two combustion chambers of the present embodiment includes an inner cylinder body, a lower guide plate 4 and an upper guide plate 5, wherein the left and right sides of the lower guide plate 4 are connected with the lower part of the inner cylinder body, the axial two sides of the lower guide plate 4 have a lower gap with the inner cylinder body, the left and right sides of the upper guide plate 5 are connected with the upper part of the inner cylinder body, and the axial two sides of the upper guide plate 5 have an upper gap with the inner cylinder body; the inner cylinder body is made of high alloy, can bear the temperature of 500K-1200K, and has the average pressure difference between the inside and the outside of about 0.05 MPa;
the inner cylinder body comprises an upper half inner cylinder body 2 and a lower half inner cylinder body 3, the upper half inner cylinder body 2 is arranged on the upper portion of the lower half inner cylinder body 3 through a flange, the manufacturability is good, the installation and the maintenance are convenient, cylinder body interfaces are respectively arranged on the left side and the right side of the upper half inner cylinder body 2, an upper flow guide plate 5 is arranged in the upper half inner cylinder body 2, a sewage discharge hole 7 is formed in the bottom of the lower half inner cylinder body 3, a lower flow guide plate 4 is arranged in the lower half inner cylinder body 3, and the sewage discharge hole 7 is positioned below the lower flow guide plate 4; the combustion chamber comprises a lower half inner cylinder body 3 and a lower half inner cylinder body 2, and is characterized by further comprising positioning pins 6, transition sections 8 and a combustion chamber 1, wherein the positioning pins 6 are respectively arranged on the left side and the right side of the lower half inner cylinder body 3, the positioning pins 6 are matched with an outer cylinder to play an axial positioning role, cylinder body interfaces of the two upper half inner cylinder bodies 2 are both connected with an outlet of the combustion chamber 1, and an inlet of the combustion chamber 1 is connected with the transition sections 8; high-pressure cold air enters the combustion chamber 1 through the transition sections 8 at the two sides for mixing and combustion, and high-temperature and high-pressure gas generated enters the turbine through the inner cylinder body; the maximum transverse displacement and the maximum longitudinal displacement of the inner cylinder body are both in the connecting position with the combustion chamber, after the inner cylinder body is heated, the cylinder body interface expands outwards and upwards, and the combustion chamber and the inner cylinder interface are in an elastic splicing structure and can absorb the displacement;
the left side and the right side of the upper guide plate 5 are connected with the cylinder body interfaces of the upper half inner cylinder body 2 to form a channel with a smooth inner wall;
the cross sections of the upper guide plate 5 and the lower guide plate 4 are both V-shaped, the V-shaped two sides of the upper guide plate 5 and the lower guide plate 4 are of fan-shaped structures, gas at the joints of the cylinder bodies at the two sides can be rectified, the flowing loss is avoided, the left side and the right side of the lower guide plate 4 are provided with notches, and the notches of the lower guide plate 4 are positioned at the left side and the right side of the sewage discharge hole 7; the square gap of the lower guide plate 4 is used for discharging sewage, and the sewage in the inner cylinder body is discharged from the sewage discharge hole 7 through the gap; the sewage draining outlet 7 can not only drain sewage, but also can be matched with the outer cylinder to carry out radial positioning;
the width of the lower gap and the upper gap is 3 mm; dead angles are reduced, air flow is uniform, the temperatures of the upper guide plate 5 and the lower guide plate 4 are reduced, a lower gap on the air inlet side is shown as d1 in fig. 7, a lower gap on the air outlet side is shown as d2 in fig. 7, and an upper gap on the air inlet side and the air outlet side is shown as d3 in fig. 8; the aerodynamic force can be balanced through strength calculation, and the additional stress on the inner cylinder is reduced;
the inner cylinder body is of a streamline thin-wall volute structure, so that high-temperature gas after combustion can enter the turbine cylinder more stably; the structure of the inner cylinder body is a bilaterally symmetrical double-air-inlet structure;
the combustion chamber 1 is vertically arranged; the compressor compresses air, guides the casing to enter the combustion chamber through the air, and guides the inner cylinder of the casing to guide high-temperature and high-pressure gas into the turbine to do work after participating in combustion; the outlet of the inner cylinder of the air guide casing is flexibly connected with the inlet of the turbine by adopting a spring cylindrical structure, and the operation requirement of the gas turbine is met by optimizing and perfecting the design through strength and vibration analysis;
1. the material of the inner cylinder body is high alloy, the bearing temperature can be 500K to 1200K, in the working state, the average pressure difference between the inside and the outside of the inner cylinder body is about 0.05MPa, the inner cylinder body is a large-size high-temperature thin-shell component, the processing and the manufacturing of the inner cylinder body are difficult, particularly the thermal deformation control difficulty is large, the typical process comprises complex plate forming, thin-wall component welding, complex structural component combined machining, vacuum brazing, vacuum heat treatment and the like, when the load temperature is calculated, a software abaqus is required to be adopted on the formed inner cylinder body to draw grids, and the grids are shown in figure 9;
2. presetting constraint conditions before calculation, wherein the constraint conditions comprise that symmetrical constraint is applied to a split surface of an inner cylinder body, circumferential constraint is applied to the inner wall of an axial positioning pin hole of the inner cylinder body, circumferential constraint is applied to a contact surface of a bottom sewage draining hole and an outer cylinder, and a model after load and constraint are applied is shown in figure 10;
3. and (3) calculating the result: the inner cylinder body has stress concentration at the junction of the upper guide plate and the air outlet side of the inner cylinder body, and comparing the graph 11, the graph 12 and the graph 13, the temperature of the guide plate is far higher than that of the surrounding inner cylinder body, the guide plate expands too much, the surrounding cylinder body is extruded, and the larger stress concentration is generated at the discontinuous position of connection;
before improvement, two sides of the upper guide plate are in direct contact with the outer cylinder, as shown in figure 14 (left), when no gap exists, the stress level of the inner cylinder is 1394 MPa; after improvement, gaps of 3-10mm are formed between the two sides of the upper guide plate and the inner cylinder, as shown in fig. 14 (right), the stress of the inner cylinder body is 485MPa, and the stress level is reduced by 65%;
before improvement, two sides of the lower guide plate are in direct contact with the outer cylinder, as shown in fig. 15 (left), when no gap exists, the stress level of the inner cylinder is 405 MPa; after improvement, gaps of 3-10mm are formed between the two sides of the lower guide plate and the inner cylinder, as shown in figure 15 (right), the stress of the inner cylinder body is 245MPa, and the stress level is reduced by 40%;
as can be seen from FIG. 10, the maximum lateral and longitudinal displacements of the inner cylinder are both at the combustion chamber port, and the port expands outward and upward when the inner cylinder is heated; the combustion chamber and the inner cylinder body interface are of an elastic insertion structure and can absorb the displacement.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …", "above … …", "above … …, on a surface", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a gas turbine air guide machine casket inner casing of two combustors, includes inner cylinder body, lower guide plate (4) and goes up guide plate (5), the left and right sides of lower guide plate (4) and the sub-unit connection of inner cylinder body, the axial both sides of lower guide plate (4) and inner cylinder body have the lower part clearance, the left and right sides of going up guide plate (5) is connected with the upper portion of inner cylinder body, and the axial both sides of going up guide plate (5) and inner cylinder body have the upper portion clearance.
2. The dual combustion chamber gas turbine air guide casing inner casing of claim 1, wherein: the inner cylinder body comprises a first inner cylinder body (2) and a second inner cylinder body (3), the first inner cylinder body (2) is arranged on the upper portion of the second inner cylinder body (3), cylinder body connectors are arranged on the left side and the right side of the first inner cylinder body (2) respectively, an upper guide plate (5) is arranged in the first inner cylinder body (2), a sewage discharge hole (7) is formed in the bottom of the second inner cylinder body (3), a lower guide plate (4) is arranged in the second inner cylinder body (3), and the sewage discharge hole (7) is located below the lower guide plate (4).
3. The dual combustion chamber gas turbine air guide casing inner casing of claim 2, wherein: the left side and the right side of the upper guide plate (5) are connected with the cylinder body interface of the upper half inner cylinder body (2) to form a channel with a smooth inner wall.
4. The dual combustion chamber gas turbine air guide casing inner casing of claim 2, wherein: the cross sections of the upper guide plate (5) and the lower guide plate (4) are both V-shaped, the left side and the right side of the lower guide plate (4) are provided with notches, and the notches of the lower guide plate (4) are positioned on the left side and the right side of the sewage discharge hole (7).
5. The double-combustion-chamber gas turbine air guide casing inner cylinder as claimed in claim 1 or 2, wherein: the width of the lower gap and the upper gap is 3-10 mm.
6. The dual combustion chamber gas turbine air guide casing inner casing of claim 2, wherein: still include locating pin (6), the left and right sides of lower half inner cylinder body (3) is provided with locating pin (6) respectively.
7. The dual combustion chamber gas turbine air guide casing inner casing of claim 1, wherein: the inner cylinder body is in a streamline thin-wall volute structure.
8. The dual combustion chamber gas turbine air guide casing inner casing of claim 2, wherein: the combustion chamber is characterized by further comprising a transition section (8) and a combustion chamber (1), the cylinder body interfaces of the upper half inner cylinder body (2) are connected with an outlet of the combustion chamber (1), and an inlet of the combustion chamber (1) is connected with the transition section (8).
9. The dual combustion chamber gas turbine air guide casing inner casing of claim 8, wherein: the combustion chamber (1) is vertically arranged.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210900301.4A CN115095395A (en) | 2022-07-28 | 2022-07-28 | Gas turbine air guide casing inner cylinder with double combustion chambers |
| PCT/CN2022/119206 WO2024021252A1 (en) | 2022-07-28 | 2022-09-16 | Air guide casing inner cylinder of gas turbine having double combustion chambers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210900301.4A CN115095395A (en) | 2022-07-28 | 2022-07-28 | Gas turbine air guide casing inner cylinder with double combustion chambers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115095395A true CN115095395A (en) | 2022-09-23 |
Family
ID=83299808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210900301.4A Pending CN115095395A (en) | 2022-07-28 | 2022-07-28 | Gas turbine air guide casing inner cylinder with double combustion chambers |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115095395A (en) |
| WO (1) | WO2024021252A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59010740D1 (en) * | 1990-12-05 | 1997-09-04 | Asea Brown Boveri | Gas turbine combustor |
| CN104654357B (en) * | 2015-01-23 | 2020-01-03 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Gas turbine combustion chamber |
| CN214787708U (en) * | 2021-06-16 | 2021-11-19 | 哈电发电设备国家工程研究中心有限公司 | Gas turbine air guide casing structure with double combustion chambers |
| CN114151825B (en) * | 2021-10-20 | 2023-03-21 | 中国航发四川燃气涡轮研究院 | Heavy gas turbine double combustion chamber ignition flame test air inlet device |
-
2022
- 2022-07-28 CN CN202210900301.4A patent/CN115095395A/en active Pending
- 2022-09-16 WO PCT/CN2022/119206 patent/WO2024021252A1/en unknown
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| Publication number | Publication date |
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| WO2024021252A1 (en) | 2024-02-01 |
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