CN217384709U - Cooling structure and engine test piece - Google Patents
Cooling structure and engine test piece Download PDFInfo
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- CN217384709U CN217384709U CN202221415365.7U CN202221415365U CN217384709U CN 217384709 U CN217384709 U CN 217384709U CN 202221415365 U CN202221415365 U CN 202221415365U CN 217384709 U CN217384709 U CN 217384709U
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- slip ring
- pipeline
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- 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
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
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Abstract
A cooling structure is used for cooling a component in a central cone of an engine, a guide hole is formed in the wall surface of the central cone, a guide seat is arranged on the guide hole, the guide seat is provided with a through hole and a cooling flow channel arranged on the periphery of the through hole, and a cooling pipeline can be introduced into the central cone through the through hole so as to cool the component to be cooled; wherein, the cooling fluid can flow into the guide seat from the cooling flow channel to isolate the heat transfer between the guide seat and the cooling pipeline. An engine test piece is also provided.
Description
Technical Field
The utility model relates to an aeroengine thermal design field, concretely relates to cooling structure and engine test piece.
Background
In the test process of an aircraft engine, in order to measure relevant parameters of dynamic stress of a high-pressure turbine, a slip ring electricity leading device is arranged in a central cone, and the outer side of the central cone is exposed in main flow gas and is influenced by high-temperature gas, so that the wall surface temperature of the central cone is generally high, and can reach over 1000 ℃ under extreme conditions. The normal working temperature of the slip ring current leading device is-55 ℃ to +80 ℃, under the working environment, the generated additional potential is low, and if the temperature exceeds a limit value, the additional potential is increased, so that a large error is introduced into a test system.
Inside cooling of slip ring electricity-leading device is gone on through freon, and slip ring external environment temperature is too high, will influence the normal work of slip ring, consequently in the test process, need in addition to the outside of slip ring electricity-leading device, the safeguard measure of leading to the cooling gas, the slip ring cooling gas generally is the rack air feed, and the air current temperature is the normal atmospheric temperature gas about 25 ℃, and under the engine operational environment, the ambient gas temperature is higher, and the cooling gas is after flowing into the slip ring through the engine, and the intensification is too high, can not reach the cooling effect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cooling structure can improve the cooling effect to the part in the engine center awl.
The cooling structure is used for cooling a component in a central cone of an engine, a guide hole is formed in the wall surface of the central cone, a guide seat is arranged on the guide hole, the guide seat is provided with a through hole and a cooling flow channel arranged on the periphery of the through hole, and a cooling pipeline can be introduced into the central cone through the through hole so as to cool the component to be cooled; wherein, the cooling fluid can flow into the guide seat from the cooling flow channel to isolate the heat transfer between the guide seat and the cooling pipeline.
In one or more embodiments, the component to be cooled is a slip ring current collector.
In one or more embodiments, the slip ring electricity lead comprises a slip ring electricity lead body and a slip ring shell, wherein a slip ring cavity is formed between the slip ring electricity lead body and the slip ring shell;
the cooling pipeline is a double-layer pipeline and comprises an inner layer pipeline and an outer layer pipeline, the inner layer pipeline and the outer layer pipeline are both communicated with the slip ring cavity, cooling medium can enter the slip ring cavity from the inner layer pipeline, and the cooling medium is discharged from the outer layer pipeline after cooling the slip ring electricity leading device shell.
In one or more embodiments, the cooling flow passage includes an inner flow passage and an outer flow passage, the inner flow passage communicates with the outer flow passage at an end near the inner portion of the center cone to allow cooling fluid to flow in from the inner flow passage and out from the outer flow passage.
In one or more embodiments, a low emissivity coating is applied between the inner flow channel and the outer flow channel.
In one or more embodiments, a plurality of the cooling structures are arranged along the circumference of the center cone.
In one or more embodiments, the guide seat is welded to the central cone wall surface.
According to the cooling structure, the cooling flow channel is additionally arranged on the guide seat, the outer wall surface of the guide seat, which is in contact with the wall surface of the central cone, is separated from the cooling pipeline, so that the effect of carrying out heat insulation protection on the cooling medium in the cooling pipeline is achieved, the on-way temperature rise of the cooling medium is reduced, the effective cooling on the inner part of the central cone is realized, and the guarantee part can normally work.
Another object of the utility model is to provide an engine test piece can improve the cooling effect to the part in the engine center awl.
The engine test piece comprises the cooling structure, and the slip ring current-guiding device in the engine center cone is cooled through the cooling structure.
The cooling structure that above-mentioned engine test piece adopted separates guide seat outer wall face and cooling pipeline that will have the contact with central awl wall face through add cooling flow channel on the guide seat, reaches the effect of carrying out thermal-insulated protection to the coolant in the cooling pipeline, reduces coolant's on-way temperature rise, realizes the effective cooling to central awl inner part, and the guarantee part can normally work.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a cooling configuration according to an embodiment.
FIG. 2 is a schematic flow diagram of a cooling structure according to an embodiment.
Detailed Description
The present invention will be further described with reference to the following embodiments and drawings, and more details will be set forth in the following description in order to provide a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in various other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions according to the actual application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the embodiments. It should be noted that these and other figures are given by way of example only and are not drawn to scale, and should not be construed as limiting the scope of the invention as it is actually claimed.
In an engine test, a slip ring current leading device 5 for measuring relevant parameters of turbine dynamic stress is arranged in a center cone 1, the outer wall surface of the center cone 1 is influenced by mainstream gas, the temperature of the outer wall surface is far higher than the normal working temperature of the slip ring current leading device 5, and a large measurement error can be caused due to overhigh temperature, so that cooling gas needs to be introduced into the slip ring current leading device 5 for protection.
The slip ring cooling air is generally supplied through the rack, and in view of simple and convenient installation, a cooling pipeline is usually led into the slip ring electricity-leading device 5 from a guide hole formed in the wall surface of the central cone 1 to realize cooling. In the working process of an engine, the temperature of the guide hole on the wall surface of the central cone 1 is close to the temperature of main stream fuel gas and can reach 1000 ℃ under extreme conditions, if a cooling medium is directly led into the slip ring electricity leading device 5 through the guide hole, the cooling medium is influenced by radiation of the wall surface when passing through the section of the wall surface of the central cone 1, the temperature of the cooling medium is rapidly increased, the temperature of the cooling medium is higher than the normal working temperature of the slip ring electricity leading device 5, and the cooling effect cannot be achieved. Therefore, a cooling structure is needed to be provided, which can effectively reduce the on-way temperature rise of the cooling gas of the slip ring power lead 5, improve the cooling effect, and provide guarantee for the normal operation of the slip ring power lead 5.
In order to achieve the above purpose, a cooling structure is shown in fig. 1, and is used for cooling a component in a center cone 1 of an engine, a guide hole is formed in a wall surface of the center cone 1, a guide seat 2 is arranged on the guide hole, the guide seat 2 is provided with a through hole 21 and a cooling flow passage 3 arranged on the periphery of the through hole 21, and a cooling pipeline 4 can be introduced into the center cone 1 through the through hole 21 to cool the component to be cooled. Wherein, the cooling fluid can flow into the guide seat 2 from the cooling flow channel 3 to isolate the heat transfer between the guide seat 2 and the cooling pipeline 4.
Above-mentioned cooling structure separates with cooling line 4 through addding cooling flow channel 3 on guide base 2, will have the outer wall of guide base 2 of contact with the 1 wall of central cone, reaches the effect of carrying out thermal-insulated protection to the coolant in cooling line 4, reduces coolant's on-way temperature rise, realizes the effective cooling to 1 inner part of central cone, and the guarantee part can normally work.
The cooling medium flows in the cooling pipeline 4 and is used for cooling the components in the central cone 1; the cooling fluid flows in the cooling flow channel 3 and is used for isolating heat transfer between the guide seat 2 and the cooling pipeline 4, so that the effect of carrying out heat insulation protection on the cooling medium is achieved.
According to some embodiments of the present application, the component to be cooled is a slip ring current lead 5. The slip ring electricity guiding device 5 includes a slip ring electricity guiding device body 52 and a slip ring housing 51, and a slip ring cavity 53 is formed between the slip ring electricity guiding device body 52 and the slip ring housing 51. The cooling pipeline 4 is a double-layer pipeline and comprises an inner-layer pipeline 41 and an outer-layer pipeline 42, the inner-layer pipeline 41 and the outer-layer pipeline 42 are both communicated with the slip ring cavity 53, a cooling medium can enter the slip ring cavity 53 from the inner-layer pipeline 41, and the cooling medium is discharged from the outer-layer pipeline 42 after cooling the shell of the slip ring electricity leading device 5.
In the working process of the engine, besides the main stream gas passes through the wall surface of the central cone 1, the secondary stream gas discharged through the rear casing is also arranged in the cavity of the central cone 1, the temperature of the secondary stream is lower than that of the main stream and is generally below 500 ℃, but for the slip ring electricity guiding device 5, the temperature of the secondary stream is still far higher than the normal working temperature, so that the cooling medium introduced into the slip ring electricity guiding device 5 needs to be isolated from the secondary stream gas. The cooling medium of the slip ring electricity leading device 5 is generally supplied by a rack, the normal temperature gas supplied by the rack is about 25 ℃, after the slip ring is cooled, the cooling medium takes away part of heat, the temperature is raised, but the temperature of the cooling medium is still far lower than the temperature of secondary flow air current.
By adopting the cooling pipeline 4 with the double-layer pipeline, the cooling medium for the slip ring electricity-guiding device 5 flows into the slip ring cavity 53 from the inner-layer pipeline 41, the cooling medium can flow in the slip ring cavity 53 in a mode shown by an arrow a in fig. 2, so as to cool the shell of the slip ring electricity-guiding device 5, the cooled cooling medium is discharged through the outer-layer pipeline 42, and the cooling medium in the outer-layer pipeline 42 can further play a role in heat insulation protection for the inner-layer pipeline 41. Compared with a single-layer pipe, the cooling medium in the pipeline is directly in heat transfer with the cooling fluid in the cooling flow channel 3, and the cooling effect of the slip ring electricity guiding device 5 by the cooling pipeline 4 with the double-layer pipeline is better. In other embodiments, the cooling structure may also be used to cool other components to be cooled that are disposed within the engine center cone 1.
According to some embodiments of the present application, the cooling flow channel 3 includes an inner flow channel 31 and an outer flow channel 32, the inner flow channel 31 communicates with the outer flow channel 32 at an end 30 near the inner portion of the center cone 1 to allow the cooling fluid to flow in from the inner flow channel 31 and flow out from the outer flow channel 32. Specifically, referring to fig. 2, the cooling fluid may flow in the cooling flow channel 3 in a manner shown by an arrow b in fig. 2, the lower portion of the interlayer between the inner flow channel 31 and the outer flow channel 32 is provided with a plurality of outlets 6, the cooling fluid flows in from the inner flow channel 31 and flows to the outer flow channel 32 through the plurality of outlets 6 to be discharged, and the cooling fluid in the outer flow channel 32 may perform a heat insulation protection function on the inner flow channel 31, thereby reducing the temperature rise of the cooling fluid along the path, and enabling the cooling flow channel 3 to have a better heat insulation effect.
According to some embodiments of the present application, a low emissivity coating is applied between the inner layer flow channel 31 and the outer layer flow channel 32. The coating with low radiation emissivity is sprayed on the interlayer between the inner runner 31 and the outer runner 32, so that the radiation heating of the outer runner 32 to the inner runner 31 can be obviously reduced; meanwhile, as the cooling fluid is introduced into the cooling flow passage 3, the inner flow passage 31 which absorbs the radiant heat of the outer flow passage 32 can be cooled, and the on-way temperature rise of the cooling medium in the cooling pipeline 4 is effectively reduced.
In one embodiment, a plurality of cooling structures are arranged along the circumference of the central cone 1 to increase the cooling effect on the slip ring current lead 5. The specific number of guide shoes 2 can be adjusted according to the required flow of cooling medium in the components of the centre cone 1.
In one embodiment, the guide seat 2 is welded on the wall surface of the central cone 1, so that the structure of the guide seat 2 can bear the impact strength of the main flow gas flowing through the wall surface of the central cone 1, and the stability of the cooling structure is ensured.
The application also provides an engine test piece, which comprises the cooling structure, and the slip ring electricity-leading device 5 in the engine center cone 1 is cooled through the cooling structure. This cooling structure adopts the simple guide seat 2 and the double-deck cooling line 4 that have double-deck cooling runner 3 of structural style to spraying low emissivity coating between two-layer cooling runner 3, reduce the radiation effect of outer runner 32 to inlayer runner 31, reach the effect of carrying out thermal-insulated protection to sliding ring electricity guiding device 5's coolant, reduce coolant's on-the-way temperature rise, ensure sliding ring electricity guiding device 5's normal work, guarantee the security, increase of service life, can promote sliding ring electricity guiding device 5 measured data's accuracy simultaneously.
Although the preferred embodiments of the present invention have been disclosed, the present invention is not limited thereto, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.
Claims (8)
1. A cooling structure is used for cooling a component in a center cone of an engine, and is characterized in that a guide hole is formed in the wall surface of the center cone, a guide seat is arranged on the guide hole, the guide seat is provided with a through hole and a cooling flow channel arranged on the periphery of the through hole, and a cooling pipeline can be introduced into the center cone through the through hole so as to cool the component to be cooled;
wherein, the cooling fluid can flow into the guide seat from the cooling flow channel to isolate the heat transfer between the guide seat and the cooling pipeline.
2. The cooling structure according to claim 1, wherein the component to be cooled is a slip ring current collector.
3. The cooling structure of claim 2, wherein the slip ring power lead comprises a slip ring power lead body and a slip ring housing, a slip ring cavity being formed between the slip ring power lead body and the slip ring housing;
the cooling pipeline is a double-layer pipeline and comprises an inner layer pipeline and an outer layer pipeline, the inner layer pipeline and the outer layer pipeline are both communicated with the slip ring cavity, cooling medium can enter the slip ring cavity from the inner layer pipeline, and the cooling medium is discharged from the outer layer pipeline after cooling the slip ring electricity leading device shell.
4. The cooling structure of claim 1, wherein the cooling channels include an inner channel and an outer channel, the inner channel communicating with the outer channel at an end near an interior of the centercone to allow cooling fluid to flow in from the inner channel and out from the outer channel.
5. The cooling structure of claim 4, wherein a low emissivity coating is applied between the inner flow passage and the outer flow passage.
6. The cooling structure according to claim 1, wherein a plurality of the cooling structures are arranged along a circumferential direction of the center cone.
7. The cooling structure of claim 1, wherein said guide seat is welded to said central cone wall surface.
8. An engine test piece, characterized by comprising a cooling structure as claimed in any one of claims 1 to 7, through which a slip ring current lead in an engine center cone is cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221415365.7U CN217384709U (en) | 2022-06-07 | 2022-06-07 | Cooling structure and engine test piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221415365.7U CN217384709U (en) | 2022-06-07 | 2022-06-07 | Cooling structure and engine test piece |
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| Publication Number | Publication Date |
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| CN217384709U true CN217384709U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221415365.7U Active CN217384709U (en) | 2022-06-07 | 2022-06-07 | Cooling structure and engine test piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115342774A (en) * | 2022-10-20 | 2022-11-15 | 北京航天动力研究所 | Strain measurement system for high-speed flexible rotor turbine disc of liquid rocket engine |
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2022
- 2022-06-07 CN CN202221415365.7U patent/CN217384709U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115342774A (en) * | 2022-10-20 | 2022-11-15 | 北京航天动力研究所 | Strain measurement system for high-speed flexible rotor turbine disc of liquid rocket engine |
| CN115342774B (en) * | 2022-10-20 | 2023-05-12 | 北京航天动力研究所 | Strain measurement system for high-speed flexible rotor turbine disk of liquid rocket engine |
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