CN112747886B - Thin-wall throat - Google Patents
Thin-wall throat Download PDFInfo
- Publication number
- CN112747886B CN112747886B CN202011605867.1A CN202011605867A CN112747886B CN 112747886 B CN112747886 B CN 112747886B CN 202011605867 A CN202011605867 A CN 202011605867A CN 112747886 B CN112747886 B CN 112747886B
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- thin
- wall
- inner sleeve
- sleeve
- throat
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- 229910000906 Bronze Inorganic materials 0.000 claims abstract description 10
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010974 bronze Substances 0.000 claims abstract description 10
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 10
- 230000008602 contraction Effects 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000003466 welding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to the technical field of aerospace, in particular to a thin-wall throat; the thin-wall throat comprises a thin-wall inner sleeve, wherein the wall thickness of the thin-wall inner sleeve is between 1.5mm and 2.5mm, the thin-wall inner sleeve is made of zirconium bronze, and the thin-wall inner sleeve is provided with a contraction end and an expansion end; the flange outer sleeve is sleeved on the thin-wall inner sleeve; according to the thin-wall throat provided by the invention, the thin-wall inner sleeve made of zirconium bronze is arranged in the wall inner sleeve, and the thickness of the thin-wall inner sleeve is set to be 1.5 mm-2.5 mm, so that compared with the prior art, the thin-wall throat can keep heat balance and uniform heat exchange in the process on the basis of ensuring the stable tensile strength of the inner sleeve, and the situation that the throat is damaged due to the uneven heat of the thin-wall inner sleeve is avoided; in addition, due to the reduction of the wall thickness, the heat exchange efficiency of the inner wall surface and the outer wall surface of the thin wall is greatly improved.
Description
Technical Field
The invention relates to the technical field of aerospace, in particular to a thin-wall throat.
Background
The electric arc heating equipment is used for heating test gas by using an electric arc to generate equipment capable of simulating a thermal environment during hypersonic flight, is a large-scale ground test equipment for generating a high-temperature high-pressure supersonic thermal environment through a Laval nozzle as an important heat-proof and thermal structure test device, is mainly used for ablation examination of heat-proof materials and heat-proof structures of hypersonic aircrafts and space returning cabins, and provides ground test data for the design of a heat-proof system.
The throat is the most important component of the Laval nozzle and is a key component for forming a high-temperature high-pressure supersonic flow field; because the throat is the position with the minimum cross-sectional area of the whole flow field, the borne aerodynamic thermal load is the severest, and the shape and the size of the throat more directly influence the quality of the flow field, the throat can bear thousands of Kelvin high temperature and several megapascals, and meanwhile, the throat is ensured not to deform and be damaged; throat design has long been a key technology and a significant problem in the construction of electric arc heating equipment.
The traditional throat is made of a red copper inner sleeve and a stainless steel outer sleeve, the wall thickness of the inner sleeve is large and is generally larger than 5mm due to the low tensile strength of red copper, a red copper half piece is arranged between the inner sleeve and the outer sleeve to increase the overall strength of the throat and form a cooling water channel, and finally the inner sleeve and the outer sleeve are connected in an interference fit or a threaded manner and are sealed through a sealing ring; however, the inner surface and the outer surface of the inner sleeve have uneven heat exchange due to the overlarge wall thickness of the inner sleeve, and heat is excessively concentrated, so that the technical problem of throat damage caused by insufficient heat exchange of the inner sleeve often occurs.
Disclosure of Invention
The invention aims to provide a thin-wall throat which can keep heat balance and heat exchange uniform in the process and avoid the situation that the throat is damaged due to nonuniform heat of a thin-wall inner sleeve;
the invention provides a thin-wall throat, which comprises:
the wall thickness of the thin-wall inner sleeve is between 1.5mm and 2.5mm, the thin-wall inner sleeve is made of zirconium bronze, and the thin-wall inner sleeve is provided with a contraction end and an expansion end;
and the flange outer sleeve is sleeved on the thin-wall inner sleeve.
As a further embodiment, both the converging end and the diverging end are provided with an outer convex weld.
In another embodiment, the outer wall of the flange outer sleeve is provided with a pressure measuring hole group.
In another embodiment, the device further comprises a pressure measuring device connected with the pressure measuring hole group.
As another embodiment, the pressure measuring hole group comprises a first testing port and a second testing port, the first testing port is arranged on the end surface of the flange outer sleeve, the second testing port is arranged on the outer side wall of the flange outer sleeve, the first testing port is communicated with the second testing port, and the pressure measuring device is arranged on the second testing port; and plugs are arranged on the first test port and the second test port.
As another embodiment, the number of the first test ports is 1, the number of the second test ports is 2, and the first test ports and the second test ports are communicated with the outer wall of the thin-wall inner sleeve.
As another implementation mode, the two ends of the flange outer sleeve are respectively provided with a water inlet and a water outlet which are communicated.
As another implementation mode, the water inlet and the water outlet of the flange outer sleeve are respectively positioned on the same side with the contraction end and the expansion end of the thin-wall inner sleeve.
As another embodiment, the end face, close to the water inlet, of the flange outer sleeve is also provided with a welding groove for mounting a pressure measuring device.
As another implementation mode, the outer flange sleeve is welded with the thin-wall inner sleeve, a gap exists between the inner wall of the middle part of the outer flange sleeve and the outer wall of the middle part of the thin-wall inner sleeve, and the water inlet and the water outlet are communicated through the gap.
Has the advantages that:
the technical effects are as follows: according to the thin-wall throat provided by the invention, the thin-wall inner sleeve made of zirconium bronze is arranged in the wall inner sleeve, and the thickness of the thin-wall inner sleeve is set to be 1.5 mm-2.5 mm, so that compared with the prior art, the thin-wall throat can keep heat balance and uniform heat exchange in the process on the basis of ensuring the stable tensile strength of the inner sleeve, and the situation that the throat is damaged due to the uneven heat of the thin-wall inner sleeve is avoided; in addition, due to the reduction of the wall thickness, the heat exchange efficiency of the inner wall surface and the outer wall surface of the thin wall is greatly improved.
The social effect is as follows: according to the thin-wall throat provided by the invention, the inner wall sleeve is provided with the thin-wall inner sleeve made of zirconium bronze, and the thickness of the thin-wall inner sleeve is set to be 1.5 mm-2.5 mm.
The economic effect is as follows: according to the thin-wall throat provided by the invention, the thin-wall inner sleeve is arranged to be the thin-wall inner sleeve made of zirconium bronze, and the thickness of the thin-wall inner sleeve is set to be 1.5 mm-2.5 mm.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a thin-walled throat according to the present invention during installation;
fig. 2 is a schematic perspective view of a thin-wall throat according to the present invention.
FIG. 3 is a schematic diagram of a flat cross-sectional structure of a thin-walled throat according to the present invention.
Description of reference numerals:
1. a thin-walled inner sleeve; 11. a contracting end; 12. an expansion end;
2. a flange outer sleeve; 21. a water inlet; 22. a water outlet;
3. a convex welding part;
4. a pressure measuring hole group; 41. a first test port; 42. a second test port;
5. a pressure measuring device;
6. welding a groove;
7. a gap.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the thin-walled throat provided by the present invention comprises a thin-walled inner sleeve 1 and a flange outer sleeve 2, wherein the wall thickness of the thin-walled inner sleeve 1 is between 1.5mm and 2.5mm, the thin-walled inner sleeve 1 is a thin-walled inner sleeve 1 made of zirconium bronze, and the thin-walled inner sleeve 1 has a contraction end 11 and an expansion end 12; in practical use, the thin-wall inner sleeve 1 is set to be the thin-wall inner sleeve made of zirconium bronze, and the thickness of the thin-wall inner sleeve 1 is set to be 1.5mm to 2.5mm, compared with the prior art, the thin-wall throat can keep heat balance and uniform heat exchange in the process on the basis of ensuring the stable tensile strength of the inner sleeve, and the situation that the throat is damaged due to the uneven heat of the thin-wall inner sleeve 1 is avoided; in addition, due to the reduction of the wall thickness, the heat exchange efficiency of the inner wall surface and the outer wall surface of the thin wall is greatly improved;
it should be noted that, in some embodiments, the wall thickness of the thin-walled inner sleeve 1 may be 1.5mm, or may also be 2mm or 2.5mm;
the flange outer sleeve 2 is sleeved on the thin-wall inner sleeve 1; in actual use, the device is used for connecting with other equipment, and is convenient for cooling the thin-wall inner sleeve 1; wherein,
the end parts of the contraction end 11 and the expansion end 12 are provided with outer convex welding parts 3; in actual use, the thin-wall throat provided by the invention is convenient to weld with other equipment in the actual use process by arranging the outer convex welding part 3; it should be understood that other connection means may be used by those skilled in the art;
certainly, in order to measure the pressure of the throat, in practical use, the outer wall of the flange outer sleeve 2 is provided with a pressure measuring hole group 4;
specifically, the pressure measuring hole group 4 comprises a first testing port 41 and a second testing port 42, the first testing port 41 is arranged on the end face of the flange outer sleeve 2, the second testing port 42 is arranged on the outer side wall of the flange outer sleeve 2, the first testing port 41 is communicated with the second testing port 42, and the pressure measuring device 5 is arranged on the second testing port 42; the flange outer sleeve 2 is preferably made of stainless steel; plugs are further arranged on the first test port 41 and the second test port 42, and the plugs are preferably made of stainless steel; in practical use, the first test port 41 and the second test port 42 respectively provided at different positions can perform two functions: firstly, the test is convenient, and the situation that the test cannot be performed due to the obstruction of other devices or parts in the use process is prevented; secondly, by arranging the first test port 41 and the second test port 42, the accuracy of the test can be ensured, for example, the test is performed twice respectively and the average value is calculated, so as to reduce the actual measurement error; the plug has the first function of preventing the test port from being blocked; secondly, the first test port 41 and the second test port 42 are convenient to be tested respectively; it should be understood that the shape of the plug may be any shape as long as the plug can plug the first test port 41 and the second test port 42, and in this embodiment, the plug is preferably cylindrical;
then, the number of the first test ports 41 is 1, the number of the second test ports 42 is 2, and the first test ports 41 and the second test ports 42 are communicated with the outer wall of the thin-wall inner sleeve 1; the number of the first test ports 41 is set according to actual needs, and it should be understood that, according to other embodiments of the present invention, more first test ports 41 and/or second test ports 42 may be provided, and of course, the first test ports 41 and/or second test ports 42 may not be provided, so as to simplify the throat;
in the invention, in order to cool the throat, a water inlet 21 and a water outlet 22 are respectively arranged at two ends of the flange jacket 2, and the water inlet 21 is communicated with the water outlet 22;
it should be noted that the directions of the water inlet 21 and the water outlet 22 may be the same side or opposite sides, as long as the cooling heat exchange can be performed on the plugs;
preferably, in the invention, the water inlet 21 and the water outlet 22 of the flange outer sleeve 2 are respectively positioned on the same side with the contraction end 11 and the expansion end 12 of the thin-wall inner sleeve 1; in practical use, the water inlet 21 and the water outlet 22 are arranged at two opposite ends so as to facilitate subsequent heat exchange;
naturally, in order to facilitate the installation of the pressure measuring device 5, the end surface of the flange outer sleeve 2 close to the water inlet 21 is also provided with a welding groove 6 for installing the pressure measuring device 5; in practical use, the pressure measuring device 5 can be inserted into the welding groove 6;
specifically, the flange outer sleeve 2 is welded with the thin-wall inner sleeve 1 through brazing, a gap 7 exists between the inner wall of the middle part of the flange outer sleeve 2 and the outer wall of the middle part of the thin-wall inner sleeve 1, and the water inlet 21 is communicated with the water outlet 22 through the gap 7; in the practical use, the flange outer sleeve 2 and the thin-wall inner sleeve 1 are integrally welded together by utilizing the brazing technology, so that the overall strength of the throat is greatly improved, the throat is convenient to use, assembly and installation of a sealing ring are not needed, the service life is greatly prolonged, and subsequent maintenance work is reduced.
According to the thin-wall throat provided by the invention, the thin-wall inner sleeve 1 is set to be the thin-wall inner sleeve made of zirconium bronze, and the thickness of the thin-wall inner sleeve 1 is set to be 1.5 mm-2.5 mm, so that compared with the prior art, the thin-wall throat can keep heat balance and uniform heat exchange in the process on the basis of ensuring the stable tensile strength of the thin-wall inner sleeve 1, and the throat is prevented from being damaged due to the nonuniform heat of the thin-wall inner sleeve 1; in addition, the heat exchange efficiency of the inner wall surface and the outer wall surface of the thin-wall inner sleeve 1 is greatly improved due to the reduction of the wall thickness; the applicability and the stability of the throat are improved, the pressure of the contraction end 11 can be measured, and the throat can bear the aerodynamic heat load of which the total temperature of the airflow is more than 3500K and the total pressure of the airflow exceeds 10 MPa.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A thin walled throat, comprising:
the wall thickness of the thin-wall inner sleeve (1) is between 1.5mm and 2.5mm, the thin-wall inner sleeve (1) is made of zirconium bronze, and the thin-wall inner sleeve (1) is provided with a contraction end (11) and an expansion end (12);
the flange outer sleeve (2) is sleeved on the thin-wall inner sleeve (1);
the outer wall of the flange outer sleeve (2) is provided with a pressure measuring hole group (4);
the pressure measuring device (5) is connected with the pressure measuring hole group (4);
the pressure measuring hole group (4) comprises a first testing port (41) and a second testing port (42), the first testing port (41) is arranged on the end face of the flange outer sleeve (2), the second testing port (42) is arranged on the outer side wall of the flange outer sleeve (2), the first testing port (41) is communicated with the second testing port (42), and the pressure measuring device (5) is arranged on the second testing port (42); plugs are further arranged on the first test port (41) and the second test port (42);
the number of the first test ports (41) is 1, the number of the second test ports (42) is 2, and the first test ports (41) and the second test ports (42) are communicated with the outer wall of the thin-wall inner sleeve (1).
2. Thin-walled throat according to claim 1, characterised in that the ends of the converging (11) and diverging (12) ends are provided with a male weld (3).
3. The thin-walled throat according to claim 1, wherein a water inlet (21) and a water outlet (22) are respectively formed at two ends of the flange outer sleeve (2), and the water inlet (21) is communicated with the water outlet (22).
4. A thin walled throat according to claim 1, characterised in that the water inlet (21) and outlet (22) of the outer flange sleeve (2) are located on the same side as the converging (11) and diverging (12) ends of the inner thin walled sleeve (1), respectively.
5. A thin-walled throat according to claim 3, wherein the end face of the flange outer casing (2) close to the water inlet (21) is further provided with a welding groove (6) for mounting a pressure measuring device (5).
6. A thin walled throat according to claim 3, characterized in that the flange outer sleeve (2) is welded with the thin walled inner sleeve (1), a gap (7) exists between the inner wall of the flange outer sleeve (2) and the outer wall of the thin walled inner sleeve (1), and the water inlet (21) and the water outlet (22) are communicated through the gap (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011605867.1A CN112747886B (en) | 2020-12-29 | 2020-12-29 | Thin-wall throat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011605867.1A CN112747886B (en) | 2020-12-29 | 2020-12-29 | Thin-wall throat |
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| Publication Number | Publication Date |
|---|---|
| CN112747886A CN112747886A (en) | 2021-05-04 |
| CN112747886B true CN112747886B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011605867.1A Active CN112747886B (en) | 2020-12-29 | 2020-12-29 | Thin-wall throat |
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| CN112747886A (en) | 2021-05-04 |
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