CN115655634A - Large-size water-cooled combustion chamber with three-layer structure and manufacturing method thereof - Google Patents
Large-size water-cooled combustion chamber with three-layer structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN115655634A CN115655634A CN202211401964.8A CN202211401964A CN115655634A CN 115655634 A CN115655634 A CN 115655634A CN 202211401964 A CN202211401964 A CN 202211401964A CN 115655634 A CN115655634 A CN 115655634A
- Authority
- CN
- China
- Prior art keywords
- wall
- cooling water
- combustion chamber
- pressure
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a large-size water-cooled combustion chamber with a three-layer structure and a manufacturing method thereof. The large-size water-cooled combustion chamber is provided with three layers of structures, namely an inner wall, an outer wall and a pressure-bearing shell, wherein a plurality of longitudinal cooling grooves parallel to a central axis are formed in the outer wall surface of the inner wall or the inner wall surface of the outer wall, and two ends of three layers of circular tubes are plugged through annular plug blocks. The inner wall and the outer wall of the manufacturing method of the large-size water-cooled combustion chamber are fixedly connected by brazing, and the formed assembly is fixedly connected with the pressure-bearing shell in an interference fit manner. The large-size water-cooled combustion chamber can meet the requirements of high working parameters and large-size combustion chambers, the gas temperature is 2000-3000K, the working pressure is more than 10MPa, the inner diameter dimension of the combustion chamber is more than 500mm, the size of the combustion chamber exceeds the largest rocket engine thrust chamber at present, and the large-size water-cooled combustion chamber has engineering practical value.
Description
Technical Field
The invention belongs to the technical field of high-temperature combustion wind tunnels, and particularly relates to a large-size water-cooled combustion chamber with a three-layer structure and a manufacturing method thereof.
Background
The combustion chamber is a key component of high-temperature equipment such as ground gas flow, electric arc and the like and a wind tunnel device, working parameters of the combustion chamber need to be continuously expanded along with the increase of the size of an aerospace engine/aircraft, and particularly for high-enthalpy and high-dynamic-pressure long-time simulation conditions, the temperature of gas inside the combustion chamber is required to be as high as 1600K to 3000K, and the working pressure is over 10 MPa. This presents new challenges for combustor cooling design and manufacture, which are more acute, particularly as combustor dimensions increase.
The reusable combustion chamber is cooled by circulating water when the temperature is higher than 1300K and the working time is longer than 30s, and has two typical structures: one is an assembly structure, namely a closed cooling channel is formed between assembly blocks, so that the aim of cooling the wall of the combustion chamber is fulfilled; the other is a welded structure, namely two layers of the inner wall and the outer wall are welded to form a closed cooling channel, the cooling channel can be processed on the side of the inner wall or the outer wall, and the welding process generally adopts a brazing process.
The first assembly structure mainly has two defects, namely, after the assembly structure is used for a long time and expands with heat and contracts with cold, the sealing between the assembly structures is easy to lose efficacy, and water leakage is caused; secondly, because the inner wall and the outer wall are not combined, when the dimension of the combustion chamber is large to a certain degree, the inner wall is difficult to bear high-pressure cooling water pressure, and the wall surface thickness is generally only 2mm to 5mm in order to keep effective cooling of the inner wall under the condition of large heat flow.
The second welding structure is mainly a brazing structure, and has the main problems that when the size of a combustion chamber is too large, the outer wall is thick due to pressure bearing requirements, the whole weight is large, the upper limit of the bearing of a vacuum brazing furnace is exceeded, and when the weight is too large, the temperature of a test piece is unevenly increased, the brazing quality is easily caused to be low, and the rejection rate is increased. At present, the maximum magnitude brazing furnace has the upper limit of load bearing of about 500kg, when the diameter of a combustion chamber exceeds 450mm, the length of the combustion chamber exceeds 800mm, and the gas pressure exceeds 8MPa, the weight of the designed inner wall and the outer wall generally reaches more than 1t, so that the brazing furnace cannot be used for welding.
Currently, it is highly desirable to develop a large-sized water-cooled combustor having a three-layered structure and a method for manufacturing the same.
Disclosure of Invention
The invention aims to provide a large-size water-cooled combustion chamber with a three-layer structure, and the invention aims to provide a manufacturing method of the large-size water-cooled combustion chamber with the three-layer structure.
The large-size water-cooled combustion chamber with the three-layer structure is characterized by comprising three layers of circular tubes which are arranged from inside to outside and are the same with a central axis, wherein the inner layer circular tube is an inner wall, the middle layer circular tube is an outer wall, the outer layer circular tube with a flange is a pressure-bearing shell, a plurality of longitudinal cooling grooves which are parallel to the central axis are formed in the outer wall surface of the inner wall or the inner wall surface of the outer wall, the inner wall and the outer wall are fixedly connected through brazing, and the longitudinal cooling grooves are sealed, isolated and not communicated;
annular grooves are formed in two ends of the pressure-bearing shell, cooling water is converged in the annular grooves, and the annular groove in the front end and the annular plug block I in the front end and the annular groove in the rear end and the annular plug block II in the rear end are sealed in a vacuum electron beam welding mode; an annular cooling water supply collecting pipe is fixed in the circumferential direction of a flange at the front end of the pressure-bearing shell, a cooling water inlet is formed in the cooling water supply collecting pipe, and the cooling water supply collecting pipe is communicated with a ring groove at the front end through a plurality of cooling water supply branch pipes distributed along the circumferential direction; an annular cooling water outlet collecting pipe is fixed in the circumferential direction of a flange at the rear end of the pressure-bearing shell, a cooling water outlet is formed in the cooling water outlet collecting pipe, and the cooling water outlet collecting pipe is communicated with a ring groove at the rear end through a plurality of cooling water outlet branch pipes distributed along the circumferential direction.
And 2 pressure sensors for measuring the pressure of the combustion chamber are also arranged on the large-size water-cooled combustion chamber.
The invention discloses a manufacturing method of a large-size water-cooling combustion chamber with a three-layer structure, which comprises the following steps:
s1, processing a plurality of longitudinal cooling grooves parallel to a central axis on the outer wall surface of the inner wall or the inner wall surface of the outer wall, and then carrying out silver plating treatment;
s2, sleeving the inner wall and the outer wall together, and placing the inner wall and the outer wall into a vacuum brazing furnace for brazing to obtain a combined piece I, and performing a hydrostatic test on the combined piece I until the design requirement is met;
s3, processing the outer surface of the outer wall until the outer surface of the assembly I meets the surface precision requirement;
s4, carrying out interference fit repair on the assembly I and the pressure-bearing shell until the design requirements are met;
s5, placing the assembly I into liquid nitrogen for cooling, and then performing interference assembly on the assembly I and a pressure-bearing shell to obtain an assembly II;
s6, an annular chock block I is arranged at the front end of the assembly II, an annular chock block II is arranged at the rear end of the assembly II, and the assembly II, the annular chock block I, the annular chock block II and the pressure-bearing shell are welded into an assembly III by adopting electron beams or fusion welding;
s7, welding cooling water supply branch pipes and corresponding cooling water supply collecting pipes which are distributed along the circumferential direction on a flange at the front end, welding cooling water outlet branch pipes and corresponding cooling water outlet collecting pipes which are distributed along the circumferential direction on a flange at the rear end, checking all contact surfaces needing to be sealed, and sealing to obtain a combined piece IV;
s8, processing mounting holes of 2 pressure sensors on a pipe body of the assembly IV, and mounting 1 pressure sensor in each mounting hole; and finishing the processing to obtain the large-size water-cooled combustion chamber with the three-layer structure.
Furthermore, the inner wall and the outer wall are made of copper alloy, and the pressure-bearing shell is made of stainless steel.
The large-size water-cooling combustion chamber with the three-layer structure has the following characteristics:
a. adopts a three-layer structure: the inner wall and the outer wall are fixedly connected by brazing, and are fixedly connected with the pressure-bearing shell in an interference fit manner after forming a combined piece;
b. after the inner wall and the outer wall are assembled with the pressure-bearing shell, the cooling water at the two ends is sealed by an annular chock block.
Compared with the traditional combustion chamber with a two-layer welding structure, the large-size water-cooling combustion chamber with the three-layer structure can greatly reduce the brazing weight by more than 80 percent, thereby reducing the requirement of the large-size combustion chamber on the bearing of a brazing furnace and enabling the combustion chamber with larger size and higher working parameters to adopt brazing.
The inner wall and the outer wall of the large-size water-cooled combustion chamber with the three-layer structure are integrally of the heat-bearing structure, the heat-bearing structure is in interference fit with the pressure-bearing shell, the gas pressure is favorably improved, the pressure-bearing shell is a main pressure-bearing component, materials are conveniently selected and working parameters are improved through the heat-bearing and pressure-bearing separation design, for example, the inner wall material can be made of copper alloy with good heat conductivity, the pressure-bearing shell is made of a stainless steel structure, and the heat-bearing and pressure-bearing design achieves decoupling of a certain scale.
Compared with the traditional combustion chamber with a two-layer welding structure, the large-size water-cooling combustion chamber with a three-layer structure has the advantages that the sizes of the inner wall and the outer wall are uniform due to the fact that no flange and other parts are arranged, the temperature of materials in a brazing furnace is uniformly increased, brazing quality is improved conveniently, and success rate is guaranteed.
Aiming at a large-scale high-working-parameter (high-temperature and high-pressure) combustion chamber, the large-size water-cooling combustion chamber with the three-layer structure has the advantages that the defects of insufficient pressure bearing and unreliable cooling water sealing of the traditional combustion chamber assembly structure with the two-layer welding structure are overcome through the three-layer structure of the inner wall, the outer wall and the pressure-bearing shell, and the defects of overlarge brazing structure weight, easy uneven heating and the like of the traditional combustion chamber with the two-layer welding structure are overcome. The requirements of high working parameters and large-size combustion chambers can be met, the gas temperature is 2000 to 3000K, the working pressure is more than 10MPa, the inner diameter dimension of the combustion chamber is more than 500mm, the size of the combustion chamber exceeds the largest rocket engine thrust chamber at present, and the large-size combustion chamber has engineering practical value.
Drawings
FIG. 1 is a schematic structural view (front sectional view) of a large-sized water-cooled combustor having a three-layer structure according to the present invention;
FIG. 2 is a schematic structural view (side view, partial cross-sectional view) of a large-sized water-cooled combustor having a three-layer structure according to the present invention;
FIG. 3 is a schematic sectional view of the inner wall and the outer wall of a large-sized water-cooled combustor having a triple-layered structure according to the present invention after assembly.
In the figure, 1. Inner wall; 2. an outer wall; 3. an annular chock block I; 4. a pressure-bearing housing; 5. a cooling water supply branch pipe; 6. a cooling water supply manifold; 7. a pressure sensor; 8. a cooling water outlet header; 9. a cooling water outlet branch pipe; 10. an annular chock II; 11. a cooling water inlet; 12. a cooling water outlet; 13. and a longitudinal cooling groove.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 to fig. 3, the large-size water-cooled combustion chamber with a three-layer structure of the embodiment includes three layers of circular tubes from inside to outside and having the same central axis, the inner layer circular tube is an inner wall 1, the middle layer circular tube is an outer wall 2, the outer layer circular tube with a flange is a pressure-bearing shell 4, the outer wall surface of the inner wall 1 or the inner wall surface of the outer wall 2 is provided with a plurality of longitudinal cooling grooves 13 parallel to the central axis, the inner wall 1 and the outer wall 2 are fixedly connected by brazing, and the longitudinal cooling grooves 13 are sealed, isolated and not communicated;
annular grooves are formed in two ends of the pressure-bearing shell 4, cooling water is converged by the annular grooves, and the annular groove in the front end and the annular plug block I3 in the front end and the annular groove in the rear end and the annular plug block II 10 in the rear end are sealed in a vacuum electron beam welding mode; an annular cooling water supply collecting pipe 6 is circumferentially fixed on a flange at the front end of the pressure-bearing shell 4, a cooling water inlet 11 is formed in the cooling water supply collecting pipe 6, and the cooling water supply collecting pipe 6 is communicated with an annular groove at the front end through a plurality of cooling water supply branch pipes 5 which are circumferentially distributed; an annular cooling water outlet collecting pipe 8 is fixed on the flange at the rear end of the pressure-bearing shell 4 in the circumferential direction, a cooling water outlet 12 is formed in the cooling water outlet collecting pipe 8, and the cooling water outlet collecting pipe 8 is communicated with a ring groove at the rear end through a plurality of cooling water outlet branch pipes 9 distributed along the circumferential direction.
The large-size water-cooled combustion chamber is also provided with 2 pressure sensors 7 for measuring the pressure of the combustion chamber.
The manufacturing method of the large-size water-cooled combustion chamber with the three-layer structure comprises the following steps:
s1, processing a plurality of longitudinal cooling grooves 13 parallel to a central axis on the outer wall surface of the inner wall 1 or the inner wall surface of the outer wall 2, and then carrying out silver plating treatment;
s2, sleeving the inner wall 1 and the outer wall 2 together, and placing the inner wall and the outer wall in a vacuum brazing furnace for brazing to obtain a combined piece I, and performing a hydrostatic test on the combined piece I until the design requirement is met;
s3, processing the outer surface of the outer wall 2 until the outer surface of the assembly I meets the surface precision requirement;
s4, carrying out interference fit repairing on the assembly I and the pressure-bearing shell 4 until the design requirements are met;
s5, placing the assembly I into liquid nitrogen for cooling, and then performing interference assembly on the assembly I and the pressure-bearing shell 4 to obtain an assembly II;
s6, an annular chock block I3 is arranged at the front end of the assembly II, an annular chock block II 10 is arranged at the rear end of the assembly II, and the assembly II, the annular chock block I3, the annular chock block II 10 and the pressure-bearing shell 4 are welded into an assembly III by adopting electron beams or fusion welding;
s7, welding cooling water supply branch pipes 5 distributed along the circumferential direction and corresponding cooling water supply collecting pipes 6 on a flange at the front end, welding cooling water outlet branch pipes 9 distributed along the circumferential direction and corresponding cooling water outlet collecting pipes 8 on a flange at the rear end, checking all contact surfaces needing to be sealed, and sealing to obtain a combined piece IV;
s8, processing mounting holes of 2 pressure sensors 7 on a pipe body of the assembly IV, and mounting 1 pressure sensor 7 in each mounting hole; and finishing the processing to obtain the large-size water-cooled combustion chamber with the three-layer structure.
Furthermore, the inner wall 1 and the outer wall 2 are made of copper alloy, and the pressure-bearing shell 4 is made of stainless steel.
Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and the embodiments, and they can be fully applied to various technical fields suitable for the present invention. Additional modifications and refinements will readily occur to those skilled in the art, and therefore the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (3)
1. A large-size water-cooled combustion chamber with a three-layer structure is characterized by comprising three layers of circular tubes which are arranged from inside to outside and have the same central axis, wherein the inner layer circular tube is an inner wall (1), the middle layer circular tube is an outer wall (2), the outer layer circular tube with a flange is a pressure-bearing shell (4), a plurality of longitudinal cooling grooves (13) which are parallel to the central axis are formed in the outer wall surface of the inner wall (1) or the inner wall surface of the outer wall (2), the inner wall (1) and the outer wall (2) are fixedly connected through brazing, and the longitudinal cooling grooves (13) are sealed, isolated and not communicated;
two ends of the pressure-bearing shell (4) are provided with annular grooves, the annular grooves are used for cooling water confluence, and the annular groove at the front end and the annular chock block I (3) at the front end and the annular groove at the rear end and the annular chock block II (10) at the rear end are sealed in a vacuum electron beam welding mode; an annular cooling water supply collecting pipe (6) is fixed on the flange at the front end of the pressure-bearing shell (4) in the circumferential direction, a cooling water inlet (11) is formed in the cooling water supply collecting pipe (6), and the cooling water supply collecting pipe (6) is communicated with an annular groove at the front end through a plurality of cooling water supply branch pipes (5) distributed along the circumferential direction; an annular cooling water outlet collecting pipe (8) is fixed on the flange at the rear end of the pressure-bearing shell (4) in the circumferential direction, a cooling water outlet (12) is formed in the cooling water outlet collecting pipe (8), and the cooling water outlet collecting pipe (8) is communicated with an annular groove at the rear end through a plurality of cooling water outlet branch pipes (9) distributed along the circumferential direction;
and 2 pressure sensors (7) for measuring the pressure of the combustion chamber are also arranged on the large-size water-cooled combustion chamber.
2. The manufacturing method of a large-size water-cooled combustor with a three-layer structure as claimed in claim 1, wherein the manufacturing method is used for manufacturing the large-size water-cooled combustor with the three-layer structure, and comprises the following steps:
s1, processing a plurality of longitudinal cooling grooves (13) parallel to a central axis on the outer wall surface of the inner wall (1) or the inner wall surface of the outer wall (2), and then carrying out silver plating treatment;
s2, sleeving the inner wall (1) and the outer wall (2) together, and placing the inner wall and the outer wall into a vacuum brazing furnace for brazing to obtain a combined piece I, and performing a hydraulic test on the combined piece I until the design requirements are met;
s3, processing the outer surface of the outer wall (2) until the outer surface of the assembly I meets the surface precision requirement;
s4, carrying out interference fit repairing on the assembly I and the pressure-bearing shell (4) until the design requirements are met;
s5, placing the assembly I into liquid nitrogen for cooling, and then performing interference assembly on the assembly I and the pressure-bearing shell (4) to obtain an assembly II;
s6, an annular chock block I (3) is arranged at the front end of the assembly II, an annular chock block II (10) is arranged at the rear end of the assembly II, and the assembly II, the annular chock block I (3), the annular chock block II (10) and the pressure-bearing shell (4) are welded into an assembly III by adopting electron beams or fusion welding;
s7, welding cooling water supply branch pipes (5) distributed along the circumferential direction and corresponding cooling water supply collecting pipes (6) on a flange at the front end, welding cooling water outlet branch pipes (9) distributed along the circumferential direction and corresponding cooling water outlet collecting pipes (8) on a flange at the rear end, checking all contact surfaces needing to be sealed, and sealing to obtain a combined piece IV;
s8, processing mounting holes of 2 pressure sensors (7) on a pipe body of the assembly IV, and mounting 1 pressure sensor (7) in each mounting hole; and finishing the processing to obtain the large-size water-cooled combustion chamber with the three-layer structure.
3. The manufacturing method of the large-size water-cooled combustion chamber with the three-layer structure as claimed in claim 2, characterized in that the inner wall (1) and the outer wall (2) are made of copper alloy, and the pressure-bearing shell (4) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211401964.8A CN115655634A (en) | 2022-11-10 | 2022-11-10 | Large-size water-cooled combustion chamber with three-layer structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211401964.8A CN115655634A (en) | 2022-11-10 | 2022-11-10 | Large-size water-cooled combustion chamber with three-layer structure and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115655634A true CN115655634A (en) | 2023-01-31 |
Family
ID=85015217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211401964.8A Pending CN115655634A (en) | 2022-11-10 | 2022-11-10 | Large-size water-cooled combustion chamber with three-layer structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115655634A (en) |
-
2022
- 2022-11-10 CN CN202211401964.8A patent/CN115655634A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103557514B (en) | Box type high-voltage heater | |
| US5386628A (en) | Method of making a diffusion bonded rocket chamber | |
| CN206212293U (en) | One kind welding water cooled seal thermal protection struc ture | |
| US11158432B1 (en) | Heat pipe reactor core and heat exchangers formation and deployment | |
| US6920750B2 (en) | Rocket engine member and a method for manufacturing a rocket engine member | |
| EP3828399B1 (en) | Internal fuel/air heat exchangers | |
| CN101813230A (en) | Heat transmission medium pipeline and manufacturing method thereof | |
| US5375325A (en) | Method of making a rocket chamber construction | |
| US4108241A (en) | Heat exchanger and method of making | |
| US5546656A (en) | Fabrication of rocket thrust chambers | |
| CN115655634A (en) | Large-size water-cooled combustion chamber with three-layer structure and manufacturing method thereof | |
| CN106735668A (en) | A kind of soldering connecting method of W/CuCrZr polings module | |
| EP1352168B1 (en) | Rocket engine member and method for manufacturing a rocket engine member | |
| CN204879137U (en) | Anticorrosive bimetal of antiseep transition coupling | |
| US4245469A (en) | Heat exchanger and method of making | |
| CN101839386A (en) | Vacuum heat-insulated pipe | |
| CN104289809A (en) | Vacuum diffusion welding process for groove type cylindrical surface connecting piece | |
| CN115653789A (en) | Liquid rocket engine regeneration cooling body part structure, manufacturing method and engine | |
| CN113458737B (en) | Hot isostatic pressing preparation process of double-wall cooling pipe suitable for fusion reactor cladding | |
| CN113118239B (en) | Preparation method of bimetal composite pipe | |
| US4199937A (en) | Heat exchanger and method of making | |
| CN203571709U (en) | Header type high-pressure heater | |
| CN211012615U (en) | Heat exchanger with thermal expansion extension protection | |
| JP2023065163A (en) | Combustor of rocket engine and manufacturing method thereof | |
| JPS5855847B2 (en) | Double tube manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |