CN112253261A - Split type heat sink cylindrical rectifier for stable combustion of heater - Google Patents
Split type heat sink cylindrical rectifier for stable combustion of heater Download PDFInfo
- Publication number
- CN112253261A CN112253261A CN202010953327.6A CN202010953327A CN112253261A CN 112253261 A CN112253261 A CN 112253261A CN 202010953327 A CN202010953327 A CN 202010953327A CN 112253261 A CN112253261 A CN 112253261A
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- Prior art keywords
- heat sink
- hood
- rectifier
- heater
- support plate
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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
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cookers (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a split heat sink cylindrical rectifier for stable combustion of a heater, which comprises: the heat sink comprises a heat sink hood, a support plate and a connecting flange; the heat sink hood is of a circular truncated cone-shaped cylindrical structure, the outer circumferential surface of the heat sink hood is coaxially welded at one axial end of the connecting flange through more than one pair of support plates, and the shape of the heat sink hood can rectify incoming flow at the small end of the heat sink hood; one end of each support plate is welded with the heat sink hood into a whole, the other end of each support plate is in clearance fit with a corresponding mounting hole in the connecting flange, and the support plates are limited by pins in axial movement along the mounting holes; the heat sink hood, the support plate and the connecting flange are made of high-temperature-resistant materials, wherein the high temperature is larger than or equal to 2100K.
Description
Technical Field
The invention relates to the technical field of stable combustion, in particular to a split type heat sink cylindrical rectifier for stable combustion of a heater.
Background
The high-flow high-enthalpy air heater for the ground test of the hypersonic engine has the characteristics of high gas temperature (about 2100K), high pressure (highest 11Mpa), oxygen-enriched combustion, large size and the like, the heater is easy to generate the phenomenon of poor gas stability due to the characteristics, and the heater is easy to ablate, so that the structure of a heater rectifier working for a long time (more than or equal to 300s) needs to be optimized, and overheating ablation is prevented.
Disclosure of Invention
In view of the above, the invention provides a split type heat sink cylindrical rectifier for stable combustion of a heater, all structural components are made of high temperature resistant materials, the safety and reliability of the heater can be effectively enhanced, and the split type connection is adopted between a heat sink hood and a connecting flange, so that the thermal deformation can be effectively released, and the stability of the combustion work of a large-size heater is ensured; meanwhile, the heat sink hood can achieve a good rectification effect on high-temperature gas sprayed from the combustion chamber due to the shape arrangement.
The technical scheme of the invention is as follows: a split heat sink barrel rectifier for heater stabilized combustion comprising: the heat sink comprises a heat sink hood, a support plate and a connecting flange;
the heat sink hood is of a circular truncated cone-shaped cylindrical structure, the outer circumferential surface of the heat sink hood is coaxially welded at one axial end of the connecting flange through more than one pair of support plates, and the shape of the heat sink hood can rectify incoming flow at the small end of the heat sink hood; one end of each support plate is welded with the heat sink hood into a whole, the other end of each support plate is in clearance fit with a corresponding mounting hole in the connecting flange, and the support plates are limited by pins in axial movement along the mounting holes;
the heat sink hood, the support plate and the connecting flange are made of high-temperature-resistant materials, wherein the high temperature is larger than or equal to 2100K.
Preferably, all of the struts are evenly distributed along the circumference of the heat sink head cover.
Preferably, the frustoconical cylindrical structure comprises: the inner cylinder and the outer cylinder are coaxially welded into a whole, and an annular gap is formed between the inner cylinder and the outer cylinder.
Preferably, the method further comprises the following steps: and the reinforcing rib plate is arranged between the inner barrel and the outer barrel and used for reinforcing the heat sink hood.
Preferably, the reinforcing rib is made of high-temperature resistant material.
Preferably, the number of the reinforcing ribs is the same as that of the support plates, and the mounting positions of the reinforcing ribs in the heat sink hood correspond to those of the support plates.
Preferably, the inner cylinder body of the heat sink hood is flanged outwards, the outer cylinder body is flanged inwards, and the flanges of the inner and outer cylinder bodies are butted, so that the circumferential clearance between the inner cylinder body and the outer cylinder body can be increased.
Preferably, the support plate is a hollow structure, and more than one reinforcing plate is arranged in the support plate.
Has the advantages that:
1. the heat sink cylindrical rectifier adopts the high-temperature resistant material, so that the heat of high-temperature gas cannot damage the rectifier, the safety and reliability of the heater are enhanced, the heat sink hood and the connecting flange are connected in a split mode, the thermal deformation can be effectively released, and the stability of the combustion work of a large-size heater is ensured; meanwhile, the heat sink hood can achieve a good rectification effect on high-temperature gas sprayed from the combustion chamber due to the shape arrangement.
2. The specific arrangement of the heat sink hood in the invention can not only enhance the rectification effect of the rectifier, but also prevent the rectifier from deforming due to bearing high-pressure gas.
3. The heat sink hood is internally provided with the reinforcing rib plate, so that the connection strength between the inner barrel body and the outer barrel body of the heat sink hood can be effectively enhanced, and the heat sink hood is reinforced.
4. According to the invention, the arrangement and connection of the flanging between the inner barrel and the outer barrel of the heat sink hood can effectively increase the annular clearance for heat dissipation between the inner barrel and the outer barrel, and meanwhile, the structural size and the weight of the heat sink hood cannot be obviously increased.
5. The support plate is arranged specifically, so that the rectifying effect of the rectifier can be enhanced, and the weight of the rectifier can be reduced.
Drawings
Fig. 1 is a perspective view of a split heat sink cylindrical rectifier of the present invention.
Fig. 2 is a side view (including a partial cross-sectional view) of a split heat sink cylindrical rectifier of the present invention.
Fig. 3 is a front view of a split heat sink cylindrical rectifier of the present invention.
Fig. 4 is a cross-sectional view of fig. 1.
Wherein, 1-heat sink hood, 2-support plate, 3-connecting flange.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides a split type heat sink cylindrical rectifier for stable combustion of a heater, all structural components are made of high-temperature-resistant materials, the safety and reliability of the heater can be effectively enhanced, and the heat sink hood and the connecting flange are connected in a split manner, so that the thermal deformation can be effectively released, and the stability of combustion work of a large-size heater is ensured; meanwhile, the heat sink hood can achieve a good rectification effect on high-temperature gas sprayed from the combustion chamber due to the shape arrangement.
As shown in fig. 1-4, a heat sink cylindrical rectifier includes: a heat sink head cover 1, a support plate 2 and a connecting flange 3.
Connection relation of the heat sink cylindrical rectifier: the heat sink hood 1 is of a circular truncated cone-shaped cylindrical structure, the outer circumferential surface of the heat sink hood 1 is coaxially welded at one axial end of the connecting flange 3 through four support plates 2 (the four support plates 2 are uniformly distributed along the circumferential direction of the heat sink hood 1), the end of the connecting flange 3 is connected with the expansion section, and the other end of the connecting flange is connected with the stabilizing section of the heater; the expansion section and the small end of the heat sink hood 1 face the combustion chamber, so that the heat sink hood 1 and the support plate 2 are both positioned in the expansion section, and high-temperature gas sprayed from the combustion chamber enters the expansion section and flows to the stable section of the heater after being rectified by the heat sink hood 1 in the rectifier;
one end of each support plate 2 is welded with the heat sink hood 1 into a whole, the other end of each support plate is in clearance fit with a corresponding mounting hole in the connecting flange 3, and the support plates 2 are limited in axial movement (along the radial direction of the connecting flange 3) through pins; because the support plate 2 is in clearance fit with the mounting hole on the connecting flange 3, the support plate 2 has a space for releasing thermal deformation after being heated, thereby reducing the accumulation of thermal stress and enhancing the safety and reliability of the heater rectifier;
the heat sink hood 1, the support plate 2 and the connecting flange 3 are made of high-temperature-resistant materials (high-temperature-resistant temperature is greater than or equal to 2100K), so that the rectifier cannot be damaged by the heat of high-temperature gas, the combustion stability of the heater can be greatly improved, and the service life of equipment is greatly prolonged.
Furthermore, the support plate 2 is of a hollow structure, and more than one reinforcing plate is arranged in the support plate to form more than two heat dissipation channels, so that the rectification effect of the rectifier can be enhanced, and the weight of the rectifier can be reduced.
Furthermore, the circular truncated cone-shaped cylindrical structure is formed by coaxially welding the inner cylinder body and the outer cylinder body which are circular truncated cones, and has an annular gap, so that the rectifying effect of the rectifier can be enhanced, and the rectifier can be prevented from being deformed due to the bearing of high-pressure gas.
Further, still include: and the reinforcing rib plate is arranged between the inner barrel and the outer barrel and used for enhancing the connection strength between the inner barrel and the outer barrel of the heat sink hood 1 so as to reinforce the heat sink hood 1.
Furthermore, the number of the reinforcing rib plates is consistent with that of the support plates 2, and the mounting positions of the reinforcing rib plates in the heat sink hood 1 correspond to those of the support plates 2, so that the internal and external tension of the heat sink hood 1 can be effectively balanced, and the heat sink hood 1 is effectively prevented from being damaged.
Further, the inner barrel of the heat sink hood 1 is flanged outwards, the outer barrel is flanged inwards, and the flanges of the inner barrel and the outer barrel are butted, so that the circumferential clearance for heat dissipation between the inner barrel and the outer barrel is effectively increased, and the structural size and the weight of the heat sink hood 1 cannot be obviously increased.
Furthermore, the material of the reinforcing rib plate is also a high-temperature resistant material.
The working principle of the heat sink cylindrical rectifier is as follows: the heater has large flow, so the size of the heater is correspondingly increased, but the phenomenon of unstable combustion is easy to occur under the working conditions of high temperature and high pressure, and therefore, the rectifier of the heater needs to be improved;
specifically, the method comprises the following steps: the high-temperature gas is sprayed out of the combustion chamber, structural members in the heat sink cylindrical rectifier cannot be damaged when the high-temperature gas passes through the heat sink cylindrical rectifier, and the plurality of heat dissipation channels are arranged in the heat sink cylindrical rectifier, so that the heat protection capability of the rectifier under the conditions of high temperature, high pressure and large flow is enhanced, the heat protection capability of the high enthalpy heater can be greatly enhanced, and the heater can stably work for a long time under the conditions of high temperature, high pressure and large flow;
meanwhile, the split design is beneficial to effectively releasing thermal deformation, further ensuring the working stability of combustion of a large-size heater and being beneficial to the heat sink hood 1 to be detached relative to the connecting flange 1.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 (8)
1. A split heat sink cylindrical rectifier for stable combustion in a heater, comprising: the heat sink hood (1), the support plate (2) and the connecting flange (3);
the heat sink hood (1) is of a circular truncated cone-shaped cylindrical structure, the outer circumferential surface of the heat sink hood (1) is coaxially welded at one axial end of the connecting flange (3) through more than one pair of support plates (2), and the shape of the heat sink hood (1) can rectify incoming flow at the small end of the heat sink hood; one end of each support plate (2) is welded with the heat sink hood (1) into a whole, the other end of each support plate is in clearance fit with a corresponding mounting hole in the connecting flange (3), and the support plates (2) are limited by pins in axial movement along the mounting holes;
the heat sink hood (1), the support plate (2) and the connecting flange (3) are made of high-temperature-resistant materials, wherein the high temperature is larger than or equal to 2100K.
2. The split heat sink barrel rectifier for heater stabilized combustion as claimed in claim 1, characterized in that all the struts (2) are evenly distributed along the circumference of the heat sink head cover (1).
3. The split heat sink cylindrical rectifier for heater stabilized combustion of claim 1 wherein said frustoconical cylindrical structure comprises: the inner cylinder and the outer cylinder are coaxially welded into a whole, and an annular gap is formed between the inner cylinder and the outer cylinder.
4. The split heat sink barrel rectifier for heater stabilized combustion as set forth in claim 3, further including: and the reinforcing rib plate is arranged between the inner cylinder and the outer cylinder and used for reinforcing the heat sink hood (1).
5. The split heat sink barrel rectifier for stable combustion in a heater of claim 4, wherein the reinforcing ribs are made of a high temperature resistant material.
6. The split heat sink cylindrical rectifier for stable combustion of a heater according to claim 3, wherein the number of the reinforcing ribs is the same as that of the support plates (2), and the mounting positions of the reinforcing ribs in the heat sink head cover (1) correspond to those of the support plates (2).
7. The split heat sink cylindrical rectifier for stable combustion of a heater according to claim 3, wherein the inner cylinder of the heat sink head cover (1) is flanged outwards, the outer cylinder is flanged inwards, and the flanges of the inner and outer cylinders are butted to increase the circumferential clearance between the two.
8. The split heat sink barrel rectifier for heater stabilized combustion as claimed in claim 1, characterized in that said support plate (2) is a hollow structure in which more than one reinforcing plate is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010953327.6A CN112253261B (en) | 2020-09-11 | 2020-09-11 | Split type heat sink cylindrical rectifier for stable combustion of heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010953327.6A CN112253261B (en) | 2020-09-11 | 2020-09-11 | Split type heat sink cylindrical rectifier for stable combustion of heater |
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| CN112253261A true CN112253261A (en) | 2021-01-22 |
| CN112253261B CN112253261B (en) | 2022-10-28 |
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