CN110375948B - Sealing device for gap between model and support - Google Patents
Sealing device for gap between model and support Download PDFInfo
- Publication number
- CN110375948B CN110375948B CN201910758760.1A CN201910758760A CN110375948B CN 110375948 B CN110375948 B CN 110375948B CN 201910758760 A CN201910758760 A CN 201910758760A CN 110375948 B CN110375948 B CN 110375948B
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- CN
- China
- Prior art keywords
- cover plate
- support
- model
- labyrinth groove
- model cover
- 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.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 13
- 238000012937 correction Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
-
- 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
- G01M9/02—Wind tunnels
- G01M9/04—Details
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Transportation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
A gap sealing device for a model-support belongs to the technical field of test aerodynamics and wind tunnel tests. The invention comprises a front model cover plate, an adapter plate, a back support rod balance steel sleeve, an upper blade, a sealing element, a back model cover plate and a lower blade, wherein a first labyrinth groove is processed on the lower blade, the sealing element is arranged in the first labyrinth groove, and the upper blade is arranged on the lower blade; a second labyrinth groove is formed between the front model cover plate and the rear model cover plate, the upper blade and the lower blade are arranged in the second labyrinth groove, the upper blade is connected with the adapter plate through bolts, the adapter plate is fixedly connected with the back support rod balance steel sleeve, and two ends of the front model cover plate and the rear model cover plate are connected with the model main body through bolts. The invention has simple structure and clear principle, solves the problem of sealing the gap between the model and the support, can obtain accurate support interference correction data, and can be applied to other support interference tests in the matching mode of the labyrinth groove and the sealing element.
Description
Technical Field
The invention relates to a gap sealing device for a model-support, and belongs to the technical field of test aerodynamics and wind tunnel tests.
Background
In civil aircraft force measurement tests, ensuring the consistency of true and false support simulation and eliminating or weakening the influence of series flow are technical difficulties in support interference correction tests, and from years of research on support interference test technology, the accuracy of support interference correction is directly influenced by the quality of the false support simulation. Most of civil aircraft have the aircraft body tilted upwards, and a Z-sting support or a tail support is often adopted as a main support for acquiring aerodynamic performance data during wind tunnel test. Because of the existence of the support, the damage to the shape of the model rear body is larger, the tail bypass distortion is relatively larger, the influence of the support interference is not negligible, and a proper auxiliary support mode is required to be designed for correcting the support interference. For the support interference correction of civil aircraft in high-speed wind tunnel, the auxiliary support 'two-step method' is mainly adopted for correction, namely the auxiliary support is used for obtaining the main support interference quantity without false main support. The auxiliary support is usually in the form of a back support. The quality of the false support simulation directly influences the accuracy of the support interference correction, and besides the appearance simulation, the sealing treatment of an opening gap of the false support on the model is also a key link. For the mode of combining the back support rod balance steel sleeve and the false support, the airtight problem between the upper and lower slots of the back body of the aircraft needs to be considered, if the processing is not good, the flow of the back body of the model can be directly changed by generating up-down series flow, and the test correction result is further influenced. Therefore, the upper cavity and the lower cavity are required to be sealed, no series flow is ensured, and the influence of the cavity pressure on the upper cavity and the lower cavity of the machine body is ensured to be consistent with that of the independent back support and the abdominal support.
Disclosure of Invention
The invention aims to solve the technical problems and further provides a sealing device for a gap between a model and a support.
The technical scheme of the invention is as follows:
the gap sealing device for the model-support comprises a front model cover plate, an adapter plate, a back support rod balance steel sleeve, an upper blade, a sealing piece, a rear model cover plate and a lower blade, wherein a first labyrinth groove is processed on the lower blade, the sealing piece is arranged in the first labyrinth groove, and the upper blade is arranged on the lower blade;
the front model cover plate and the rear model cover plate are fixedly connected with each other through bolts, and the two ends of the front model cover plate and the rear model cover plate are connected with the model main body through bolts.
Further, the upper blade and the lower blade are fixedly connected through screws.
Further, the seal is a teflon seal.
Further, the upper blade, the seal and the lower blade form a single piece.
Further, the front mold cover plate and the rear mold cover plate are integrally formed.
Further, the first labyrinth groove and the second labyrinth groove are vertically arranged.
Further, the size of the seal is smaller than the size of the first labyrinth groove.
The invention has the following beneficial effects: according to the invention, through the structural mode of processing the labyrinth groove and arranging the Teflon sealing piece in the labyrinth groove, airflow series flow between the die cavities can be eliminated; meanwhile, a Teflon sealing piece is adopted, so that the normal force measurement result of the balance is not affected; the invention has simple structure and clear principle, solves the problem of sealing the gap between the model and the support, can obtain accurate support interference correction data, and can be applied to other support interference tests in the matching mode of the labyrinth groove and the sealing element.
Drawings
FIG. 1 is a front elevational view of the structure of the present invention;
1-front mold cover plate in the figure; 2-an adapter plate; 3-backing the balance steel sleeve of the strut; 4-upper blade; 5-a seal; 6-a rear model cover plate; 7-lower blades; 8-a first labyrinth groove; and 9-a second labyrinth groove.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The first embodiment is as follows: referring to fig. 1, a gap sealing device between a model and a support in this embodiment is described, which comprises a front model cover plate 1, an adapter plate 2, a back support rod balance steel sleeve 3, an upper blade 4, a sealing element 5, a back model cover plate 6 and a lower blade 7, wherein a first labyrinth groove 8 is processed on the lower blade 7, the sealing element 5 is arranged in the first labyrinth groove 8, the lower blade 7 is provided with an upper blade 4, preferably, the upper blade 4 and the lower blade 7 are fixedly connected through a screw, and can be welded into a whole, so that the upper blade 4, the sealing element 5 and the lower blade 7 form a complete sealing device, and can realize common movement and placement; the seal 5 is additionally arranged in the limited space of the first labyrinth groove 8, preferably, the seal 5 is a Teflon seal, and the seal is selected and used because the seal is made of materials which are convenient to process, and can be processed along with the shape according to the shape surface of the lower blade 7, so that the seal is convenient to install in the first labyrinth groove 8, the size of the seal 5 is further optimized, the size of the seal 5 is smaller than that of the first labyrinth groove 8, in the test process, only one side of the seal 5 can touch a model or a blade, and the other side of the seal can hang to eliminate series flow between the model cavities when the auxiliary support is carried out with false support, so that the setting can ensure that the cavity pressure of the model is consistent when the auxiliary support is carried out or when the auxiliary support is carried out without influencing the normal force measurement of a balance.
The second embodiment is as follows: in the first embodiment, the second labyrinth groove 9 is formed between the front model cover plate 1 and the rear model cover plate 6, and preferably, the second labyrinth groove 9 can be formed by processing the front model cover plate 1 and the rear model cover plate 6 in an integrated mode, or the second labyrinth groove 9 can be naturally formed in the middle of the splicing mode, the upper blade 4 and the lower blade 7 are arranged in the second labyrinth groove 9, further optimization is performed, a gap formed between the blades and the model cover plate is reserved for 3 millimeters, and the reserved size can not only ensure that the model and the supporting blades are not mutually touched in the using process, but also play a certain role in blocking air flow between the inside and the outside of the model; while keeping the clearance, the model cover plate and the blades are simultaneously provided with labyrinth grooves, as the optimization, the first labyrinth groove 8 and the second labyrinth groove 9 are vertically arranged, and the labyrinth grooves can be arranged in a through mode according to the shape surface of the model cover plate in consideration of the subsequent installability, so that the ventilation of air flow between the inside and outside of the model is enhanced; the upper blade 4 is connected with the adapter plate 2 through bolts, the adapter plate 2 is fixedly connected with the back support rod balance steel sleeve 3, and therefore, aiming at the technical difficulty of civil aircraft support interference tests, a back support rod balance steel sleeve 3 and a false support simulation scheme are adopted, and two ends of the front model cover plate 1 and the rear model cover plate 6 are connected with the model main body through bolts; the upper blade 4 is fixedly connected with the back support rod balance steel sleeve 3 through the bolts, the upper cavity and the lower cavity of the model are sealed in a mode of matching the labyrinth grooves with the sealing pieces, and the air flow between the cavities can be ensured not to be in series flow.
The present embodiment is only exemplary of the present patent, and does not limit the scope of protection thereof, and those skilled in the art may also change the part thereof, so long as the spirit of the present patent is not exceeded, and the present patent is within the scope of protection thereof.
Claims (5)
1. The gap sealing device for the model-support is characterized by comprising a front model cover plate (1), an adapter plate (2), a back support rod balance steel sleeve (3), an upper blade (4), a sealing element (5), a rear model cover plate (6) and a lower blade (7), wherein a first labyrinth groove (8) is processed on the lower blade (7), the sealing element (5) is arranged in the first labyrinth groove (8), and the upper blade (4) is arranged on the lower blade (7);
a second labyrinth groove (9) is formed between the front model cover plate (1) and the rear model cover plate (6), the upper blade (4) and the lower blade (7) are arranged in the second labyrinth groove (9) together, the upper blade (4) is connected with the adapter plate (2) through bolts, the adapter plate (2) is fixedly connected with the back support rod balance steel sleeve (3), and two ends of the front model cover plate (1) and the rear model cover plate (6) are connected with the model main body through bolts;
the size of the sealing piece (5) is smaller than that of the first labyrinth groove (8);
the first labyrinth groove (8) and the second labyrinth groove (9) are vertically arranged.
2. A sealing device for a gap between mould and support according to claim 1, characterized in that the upper blade (4) and the lower blade (7) are fixedly connected by means of screws.
3. A sealing device for a mould-support gap according to claim 1, characterized in that the seal (5) is a tafludrone seal.
4. A sealing device for a mould-support gap according to claim 2, characterized in that the upper blade (4), the sealing element (5) and the lower blade (7) are formed in one piece.
5. A sealing device for a gap between mould and support according to claim 1, characterized in that the front mould cover plate (1) is integrally formed with the rear mould cover plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758760.1A CN110375948B (en) | 2019-08-16 | 2019-08-16 | Sealing device for gap between model and support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910758760.1A CN110375948B (en) | 2019-08-16 | 2019-08-16 | Sealing device for gap between model and support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110375948A CN110375948A (en) | 2019-10-25 |
| CN110375948B true CN110375948B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910758760.1A Active CN110375948B (en) | 2019-08-16 | 2019-08-16 | Sealing device for gap between model and support |
Country Status (1)
| Country | Link |
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| CN (1) | CN110375948B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432822B (en) * | 2021-05-28 | 2022-10-28 | 中国航空工业集团公司沈阳飞机设计研究所 | Aircraft wind tunnel support interference correction method |
| CN114034462B (en) * | 2022-01-07 | 2022-04-08 | 中国空气动力研究与发展中心低速空气动力研究所 | Follow-up sealing structure for wind tunnel abdominal bracing test and control method |
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| CN110375948A (en) | 2019-10-25 |
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