CN220288956U - Harvard full-open wind tunnel test model convenient to install - Google Patents
Harvard full-open wind tunnel test model convenient to install Download PDFInfo
- Publication number
- CN220288956U CN220288956U CN202321473490.8U CN202321473490U CN220288956U CN 220288956 U CN220288956 U CN 220288956U CN 202321473490 U CN202321473490 U CN 202321473490U CN 220288956 U CN220288956 U CN 220288956U
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- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 239000000523 sample Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 239000003292 glue Substances 0.000 claims description 13
- 239000011229 interlayer Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 6
- 238000004026 adhesive bonding Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000020673 hypertrichosis-acromegaloid facial appearance syndrome Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The utility model discloses a convenient-to-install half open wind tunnel test model, which comprises the following steps: the upper half and the lower half are respectively arranged on the upper half and the lower half, and the locking mechanism is used for fixing the sensor; the locking mechanism comprises a locking shell, an inner locking taper sleeve and a locking head, wherein the inner locking taper sleeve is coated on the outer wall of a probe of the sensor and is arranged in the locking head; the sensor is fixed by the locking mechanism instead of the traditional glue bonding and fixing, so that the mounting and dismounting difficulty of the sensor is reduced, the sensor is prevented from being damaged during mounting and dismounting, the sensor can be tested after being mounted, and the preparation period of a test is shortened; meanwhile, the model disclosed by the utility model adopts a half structure, has good processability, is convenient for processing a step hole on the inner side of the model, is assembled between the upper half and the lower half in a seamless manner, can be disassembled for multiple times, and is favorable for multiple use.
Description
Technical Field
The utility model relates to the field of wind tunnel models, in particular to a Harvey open wind tunnel test model convenient to install.
Background
When the hypersonic aircraft flies in the atmosphere, the hypersonic aircraft interacts with surrounding gas to cause the surface of the aircraft to form a high-temperature boundary layer, and the high-temperature boundary layer can apply aerodynamic heat load to the structure and materials of the aircraft, so that the structural safety and service life of the aircraft are seriously affected. Therefore, when the heat-proof structure design and wind tunnel test of the aircraft are examined, the surface heat flow, the temperature, the pressure and the like of the aircraft are often required to be measured and evaluated. Current conventional testing methods typically provide for the installation of corresponding sensors on the surface of an aircraft model.
In order to reduce model vibration during wind tunnel experiments, weight reduction processing is required to be carried out on the model. Conventional models are typically designed as closed/semi-closed cavities. Because of the limitation of the closed/semi-closed cavity, the sensor mounting hole can only be machined from the mold from outside to inside, the sensor is mounted in the hole, the sensor end face is exposed and flush with the mold surface, the sensor is fixed by glue, and the sensor lead needs to be led out from the mold. The following problems exist in using glue to secure the sensor: the sensor is very cumbersome to install and detach; the curing time of the glue is long, and the sensor is kept not to move in the curing process, so that the experiment preparation period is long; special attention is required when the glue is smeared, so that the mounting difficulty of the sensor is increased; the cured glue is difficult to remove and can cause damage to the mold or sensor when the sensor is disassembled. In view of the above, there is a need for improved mold tooling and assembly processes.
Disclosure of Invention
The utility model provides a Harvey full-open wind tunnel test model convenient to install, and solves the problem that an existing wind tunnel test model is inconvenient to assemble and disassemble a sensor.
A haverse open hole test model for ease of installation, comprising: the upper half and the lower half are respectively arranged on the upper half and the lower half, and the locking mechanism is used for fixing the sensor;
the locking mechanism comprises a locking shell, an inner locking taper sleeve and a locking head, wherein the inner locking taper sleeve is coated on the outer wall of a probe of the sensor and is arranged in the locking head;
the upper half and the lower half are respectively provided with a sensor mounting hole, and the sensor is arranged in the sensor mounting holes.
Further, a screw counter bore is formed in the side wall of the upper half, a threaded hole is formed in the side wall of the lower half, the screw counter bore and the threaded hole form a step hole, and the step hole is sequentially provided with a screw, an interlayer and UV glue from inside to outside.
Further, pin holes are formed in the side walls of the upper half and the lower half, and the butt joint positions of the upper half and the lower half are positioned by inserting pins into the pin holes.
Further, an annular groove is formed in the outer wall of one end of the inner locking taper sleeve and is used for installing a steel wire clamp spring, the side wall of the other end of the inner locking taper sleeve is axially grooved, the groove cavity penetrates through the inner straight hole, and the diameter of the inner straight hole of the inner locking taper sleeve is 0.05-0.1 mm larger than the outer diameter of a probe of the sensor.
Further, a through hole is formed in the middle of the locking head and used for installing an inner locking taper sleeve, two ends of the locking head are respectively a large end and a small end, a cross groove is formed in the large end in the radial direction, and threads are formed in the outer wall of the small end.
Further, a threaded blind hole is formed in the middle of the locking shell and is matched with the small end of the locking head; the side wall of the locking shell is provided with a round hole along the radial direction, and a locking steel ball and a bolt are arranged in the round hole.
Further, the interlayer is processed into a cylinder shape by teflon.
The utility model has the following beneficial effects:
(1) The wind tunnel test model adopts a haff structure, has good processability, is convenient for processing a step hole on the inner side of the model, and is convenient for mounting and fixing a sensor.
(2) The wind tunnel test model adopts the locking mechanism to fix the sensor, reduces the difficulty of mounting and dismounting the sensor, avoids the damage of the sensor during mounting and dismounting, and shortens the test preparation period.
(3) The upper half and the lower half are connected by adopting pins for positioning and screws, so that the upper half and the lower half can be assembled seamlessly and can be disassembled for multiple times; UV glue is adopted to seal the outside of the step hole of the mounting screw, so that the smoothness of the outer molded surface of the mold is maintained.
Drawings
FIG. 1 is a schematic view of the overall structure of the model of the present utility model;
FIG. 2 is an exploded view of the overall structure of the inventive model;
FIG. 3 is a schematic diagram of the structure of the connection between the upper half and the lower half of the utility model;
FIG. 4 is a schematic perspective view of the lower half of the present utility model;
FIG. 5 is a schematic cross-sectional view of a sensor mounting hole according to the present utility model;
FIG. 6 is a schematic view of a locking mechanism according to the present utility model;
FIG. 7 is an exploded view of the locking mechanism of the present utility model;
FIG. 8 is a schematic view of the structure of the lock housing of the present utility model;
FIG. 9 is a schematic view of the structure of the inner locking cone sleeve of the present utility model;
fig. 10 is a schematic structural view of a locking head according to the present utility model.
In the figure: 10-Shangfu; 101-pin holes; 102-pins; 103-a sensor mounting hole; 20-lower haver; 201-a step hole; 202-screws; 203-an interlayer; 204-UV glue; 30-a locking mechanism; 301-locking the housing; 302-inner locking taper sleeve; 303-locking head; 304-a steel wire clamp spring; 305, locking the steel balls; 40-sensor.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
Referring to fig. 1 to 5, the present utility model provides a haverse open wind tunnel test model convenient to install, comprising: the upper and lower haves 10, 20 and the locking mechanism 30 provided on the upper and lower haves 10, 20, respectively, the locking mechanism 30 being used to fix the sensor 40.
The upper haver 10 and the lower haver 20 are of equal wall thickness structures and are formed by metal processing, seamless splicing can be achieved, a splicing line is selected to be the largest projection area of a model, an inner cavity of the model is as open as possible, the step hole 201 and the sensor mounting hole 103 are convenient to machine, the step hole 201 is arranged at the butt joint position of the upper haver 10 and the lower haver 20, the sensor mounting hole 103 is a countersunk step hole, a countersunk head penetrates through the inner wall of the upper haver 10 or the lower haver 20, the end part of the small hole penetrates through the outer wall of the upper haver 10 or the lower haver 20, and the sensor 40 is arranged in the sensor mounting hole 103.
The stepped hole 201 includes a screw counterbore provided on the side wall of the upper haver 10 and a screw hole provided on the side wall of the lower haver 20, and the screw counterbore and the screw hole constitute the stepped hole 201.
The step hole 201 is sequentially provided with a screw 202, an interlayer 203 and UV glue 204 from inside to outside; the upper haver 10 is integrally connected with the lower haver 20 by screws 202.
The interlayer 203 is arranged at the top of the screw 202, the interlayer 203 is processed into a cylinder shape by teflon, the diameter of the interlayer is equal to that of a countersink of the screw, and the UV adhesive 204 is prevented from blocking the countersink at the top of the screw 202 and cannot be detached.
The top surface of the interlayer 203 is provided with UV glue 204, the top residual space of the step hole 201 is filled completely through the UV glue 204, and the outer end surface is flush with the upper half 10 or the lower half 20, so that the outer surface of the whole model is smooth and complete.
The pin holes 101 are formed in the side walls of the upper haver 10 and the lower haver 20 near the step holes 201, and the butt joint positions of the upper haver 10 and the lower haver 20 are positioned by inserting the pins 102 into the pin holes 101, so that the positioning effect is provided, and the accurate connection of each assembly can be ensured; the dowel positioning can realize that the surface type meets the experimental requirements when the upper half 10 and the lower half 20 are spliced for the second time after being disassembled.
After the inner stepped holes 201 of the upper haver 10 and the lower haver 20 and the sensor mounting holes 103 are processed, the two are spliced into a whole by using the screw 202 and the pin 102, and then the outer profile of the model is processed.
The screws 202 and the pins 102 are standard components, and the number and the specification are determined according to the actual requirements of the model.
Referring to fig. 6 to 10, the locking mechanism 30 includes a locking housing 301, an inner locking taper sleeve 302 and a locking head 303, wherein the inner locking taper sleeve 302 is coated on the outer wall of the probe of the sensor 40 and is disposed inside the locking head 303, the locking head 303 is connected with the inner locking taper sleeve 302 through a steel wire clamp spring 304, and the locking head 303 is in threaded connection with the locking housing 301.
An annular groove is formed in the outer wall of one end of the inner locking taper sleeve 302 and is used for installing a steel wire clamp spring 304, the side wall of the other end is axially grooved, a groove cavity penetrates through to an inner straight hole, the diameter of the inner straight hole of the inner locking taper sleeve 302 is 0.05-0.1 mm larger than the outer diameter of a probe of the sensor 40, the probe of the sensor 40 is conveniently fixed in the inner locking taper sleeve 302, and chamfering is conducted on the outer wall of one end of the inner locking taper sleeve 302 axially grooved. The inner locking taper 302 is integrally formed from a resilient hard metal having a straight bore diameter that is adapted to the diameter of the probe of the sensor 40.
The locking head 303 is made of stainless steel, and is internally provided with a through hole for installing the inner locking taper sleeve 302, and the inner locking taper sleeve 302 can automatically slide in the through hole; the locking head 303 has a large end and a small end at two ends, the large end is provided with a cross groove along the radial direction, the surface is knurled, and the outer wall of the small end is provided with threads.
The locking shell 301 is made of stainless steel, and a threaded blind hole (i.e. one end does not penetrate through the bottom wall of the locking shell 301) is formed in the middle, the diameter of the threaded blind hole is matched with the small end of the locking head 303, and the threaded blind hole is in threaded connection with the locking head 303; three round holes are uniformly formed in the side wall of the locking shell 301 along the radial direction, wherein locking steel balls 305 are placed in two round holes which are far apart, the locking steel balls 305 can freely move along the radial direction in a threaded blind hole without falling off due to secondary processing, a bolt is installed in the other round hole, the inner end of the bolt is inserted into an axial groove cavity of the inner locking taper sleeve 302, and the circumferential freedom degree of the inner locking taper sleeve 302 is limited through the bolt.
The steel wire clamp spring 304 is a standard part, and has the function of limiting the inner locking taper sleeve 302 from falling off after the inner locking taper sleeve 302 and the locking head 303 are assembled.
The sensor 40 generally comprises a temperature sensor, a pressure sensor and a speed sensor, and the type and the model of the sensor are selected according to actual needs.
The assembling step of the wind tunnel test model comprises the following steps:
(1) Taking the locking shell 301, the locking steel balls 305 and the bolts, putting the locking steel balls 305 into two round holes of the locking shell 301, carrying out secondary processing on the round holes, limiting the locking steel balls 305 to freely move in the holes without falling out, and knocking the bolts into the other left round holes to form the locking shell assembly.
(2) The locking head 303, the inner locking taper sleeve 302 and the steel wire clamp spring 304 are taken, the inner locking taper sleeve 302 is penetrated into a through hole of the locking head 303, and the steel wire clamp spring 304 is clamped in an annular groove of the inner locking taper sleeve 302 to form an inner locking taper sleeve assembly.
(3) The inner locking taper sleeve assembly is placed in the locking shell assembly, the axial groove cavity of the inner locking taper sleeve 32 is aligned with the bolt of the locking shell assembly, the rotary locking head 303 and the locking shell 301 form threaded engagement, the quick locking mechanism 30 is formed, and a plurality of quick locking mechanisms 30 are assembled according to the installation quantity of the sensors 40.
(4) Taking the matched upper haver 10 and lower haver 20, placing the assembled locking mechanism 30 into the sensor mounting hole 103 outwards according to the axial groove cavity of the inner locking taper sleeve 302, and inserting the sensor 40 to be mounted into the locking mechanism 30 towards the outer wall according to the measuring end face and penetrating through the model wall to be flush with the outer surface; tightening the locking head 303, and clamping the sensor 40 by means of the opposite force generated by the locking steel balls 305 and the inner locking taper sleeve 302, and fixing the locking mechanism 30 in the mounting hole 103; repeating the actions to finish the fixation of all the sensors.
(5) Taking a plurality of pins 102, installing the pins 102 into the pin holes 101 of the lower hafr 20, and aligning and splicing the upper hafr 10 and the pin holes 101 of the lower hafr 20; taking a plurality of screws 202, and fixing the upper half 10 and the lower half 20 by using the screws 202; and a plurality of interlayer 203 are taken and sequentially put into the top of the screw, and each step hole 201 is coated with UV glue 204 and cured by ultraviolet light, so that the molded surface of the mold is ensured not to be damaged.
The foregoing is merely a preferred embodiment of the utility model, which is not representative of all possible forms of the utility model, and the scope of the utility model is not limited to such specific statements and embodiments. Various other modifications and improvements can be made in light of the teachings of the present disclosure without departing from the spirit and scope of the utility model.
Claims (7)
1. The utility model provides a half open wind tunnel test model convenient to installation which characterized in that includes: the device comprises an upper half (10), a lower half (20) and locking mechanisms (30) respectively arranged on the upper half (10) and the lower half (20), wherein the locking mechanisms (30) are used for fixing a sensor (40);
the locking mechanism (30) comprises a locking shell (301), an inner locking taper sleeve (302) and a locking head (303), wherein the inner locking taper sleeve (302) is coated on the outer wall of a probe of the sensor (40) and is arranged in the locking head (303), the locking head (303) is connected with the inner locking taper sleeve (302) through a steel wire clamp spring (304), and the locking head (303) is in threaded connection with the locking shell (301);
the upper half (10) and the lower half (20) are respectively provided with a sensor mounting hole (103), and the sensor (40) is arranged in the sensor mounting holes (103).
2. The easy-to-install haverse open hole test model of claim 1, wherein: the novel anti-theft device is characterized in that screw counter bores are formed in the side walls of the upper half (10), threaded holes are formed in the side walls of the lower half (20), step holes (201) are formed in the screw counter bores and the threaded holes, and screws (202), an interlayer (203) and UV glue (204) are sequentially arranged in the step holes (201) from inside to outside.
3. The easy-to-install haverse open hole test model of claim 2, wherein: the side walls of the upper half (10) and the lower half (20) are provided with pin holes (101), and the butt joint positions of the upper half (10) and the lower half (20) are positioned by inserting pins (102) into the pin holes (101).
4. The easy-to-install haverse open hole test model of claim 1, wherein: an annular groove is formed in the outer wall of one end of the inner locking taper sleeve (302) and used for installing the steel wire clamp spring (304), the side wall of the other end of the inner locking taper sleeve is axially grooved, a groove cavity penetrates through to an inner straight hole, and the diameter of the inner straight hole of the inner locking taper sleeve (302) is 0.05-0.1 mm larger than the outer diameter of a probe of the sensor (40).
5. The easy-to-install haverse open hole test model of claim 4, wherein: the middle part of the locking head (303) is provided with a through hole for installing the inner locking taper sleeve (302), the two ends of the locking head (303) are respectively a large end and a small end, the large end is provided with a cross groove along the radial direction, and the outer wall of the small end is provided with threads.
6. The easy-to-install haverse open hole test model of claim 5, wherein: a threaded blind hole is formed in the middle of the locking shell (301), and the threaded blind hole is matched with the small end of the locking head (303); a circular hole is formed in the side wall of the locking shell (301) in the radial direction, and a locking steel ball (305) and a bolt are placed in the circular hole.
7. The easy-to-install haverse open hole test model of claim 2, wherein: the interlayer (203) is processed into a cylinder by teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321473490.8U CN220288956U (en) | 2023-06-09 | 2023-06-09 | Harvard full-open wind tunnel test model convenient to install |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321473490.8U CN220288956U (en) | 2023-06-09 | 2023-06-09 | Harvard full-open wind tunnel test model convenient to install |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220288956U true CN220288956U (en) | 2024-01-02 |
Family
ID=89327238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321473490.8U Active CN220288956U (en) | 2023-06-09 | 2023-06-09 | Harvard full-open wind tunnel test model convenient to install |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220288956U (en) |
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2023
- 2023-06-09 CN CN202321473490.8U patent/CN220288956U/en active Active
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