CN210073072U - Wing lift force demonstration device - Google Patents
Wing lift force demonstration device Download PDFInfo
- Publication number
- CN210073072U CN210073072U CN201920411547.9U CN201920411547U CN210073072U CN 210073072 U CN210073072 U CN 210073072U CN 201920411547 U CN201920411547 U CN 201920411547U CN 210073072 U CN210073072 U CN 210073072U
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- Prior art keywords
- pipe
- liquid
- straight
- tube
- curved
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- Expired - Fee Related
Links
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000005452 bending Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The application discloses wing lift presentation device, the liquid-indicating pipe including straight tube, curved arc pipe and two piece at least transparent stereoplasm, curved arc pipe is the stereoplasm pipe with the straight tube, two mouths of pipe of curved arc pipe all directly or indirectly are fixed together with the straight tube cooperation, and curved arc pipe switches on with the straight tube mutually, all directly or indirectly vertical fixation has an at least liquid-indicating pipe on curved arc pipe and the straight tube, and curved arc pipe and straight tube all switch on with the liquid-indicating pipe that is connected mutually. The utility model discloses following beneficial effect has: the lower plane and the upper cambered surface of the wing are simulated through the straight pipe and the curved pipe, meanwhile, the liquid indicating pipes are arranged on the straight pipe and the curved pipe, the air pressure at the upper cambered surface and the lower plane of the wing is visually displayed through the height of water in the liquid indicating pipes, and further the height of the liquid level in the liquid indicating pipes is observed through the cooperative use of the scale plate and the rubber film.
Description
Technical Field
The utility model relates to a teaching equipment field especially relates to a wing lift presentation device.
Background
In the teaching book of junior high school, the students have been explained how the aircraft can obtain lift takeoff, and reference can be made to page 64 of the first chapter and the third chapter of the book of eight years from science (the publisher is zhejiang education publisher, ISBN 9787553607467). In the textbook, it is explained that the upper cambered surface of the wing is subjected to small pressure, the lower plane of the wing is subjected to large pressure, and the airplane flies in the air by virtue of the pressure difference between the upper cambered surface and the lower plane of the wing, but in practice, many students have the understanding that many teachers find that: the wing is taken as a reference object, the air flow rate is the flight speed of the original airplane, the air flow rate is the same before the airplane collides with the wing, after the airplane reaches the wing, the air flow flowing through the upper cambered surface of the wing is blocked by the upper convex part of the wing, and the speed is reduced. Although this understanding appears to be clearly wrong, it is unrealistic to theoretically check these wrong understandings at the knowledge level of a beginner and a beginner, even why the airflow divided from the leading edge of the wing simultaneously reaches the trailing edge of the wing, but if the student forgets or even is asked to remember the student, the student will have a question that the air flows through the upper and lower surfaces of the wing in the same time and the flow velocity and pressure in the distance of the upper surface are large, so that it is necessary to explain the student through experiments to facilitate the student to understand and learn.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above problem, a wing lift presentation device is proposed.
The utility model adopts the following technical scheme:
the wing lift force demonstration device comprises a straight pipe, an arc bending pipe and at least two transparent and hard liquid indicating pipes, wherein the arc bending pipe and the straight pipe are both hard pipes, two pipe orifices of the arc bending pipe are directly or indirectly matched and fixed with the straight pipe together, the arc bending pipe is communicated with the straight pipe, the arc bending pipe and the straight pipe are directly or indirectly vertically fixed with the at least one liquid indicating pipe, and the arc bending pipe and the straight pipe are communicated with the liquid indicating pipes connected with each other.
The use method of the device comprises the following steps of firstly pouring colored water (preferably water or other liquid) into a water tank, horizontally placing the device above the water tank (keeping a curved pipe and a straight pipe to be parallel and level), ensuring that the straight pipe and a liquid indicating pipe connected with the curved pipe are immersed in the water tank, then inhaling air (or blowing air by using a blower to generate airflow) towards a pipe opening of the straight pipe, so that airflow is generated in the straight pipe and the curved pipe, the airflow on the two sides of the straight pipe and the curved pipe is equivalent to the airflow on the two sides of the wing, the airflow in the straight pipe is equivalent to the airflow on the lower plane of the wing, the airflow in the curved pipe is equivalent to the airflow on the upper curved surface of the wing, and the air pressure in the liquid indicating pipe connected with the straight pipe is equivalent to the air pressure on the lower plane of the wing, and the air pressure in the liquid indicating pipe connected with the curved pipe is equivalent to the air pressure on the upper curved surface of the wing), the liquid display tube is immersed in colored water, so that the air pressure in the liquid display tube can be judged according to the height of the water in the liquid display tube, and the air pressure difference between the upper cambered surface and the lower plane of the wing can be vividly demonstrated.
The device simulates the lower plane and the upper cambered surface of the wing through the straight pipe and the curved pipe, meanwhile, the straight pipe and the curved pipe are provided with the liquid indicating pipe, and the air pressure at the upper cambered surface and the lower plane of the wing is vividly displayed through the height of water in the liquid indicating pipe.
Optionally, the curved pipe is directly fixed to the straight pipe.
Optionally, the curved arc pipe and the straight pipe are fixed together by welding or bonding.
Optionally, the curved arc pipe and the straight pipe are integrally formed.
Optionally, a liquid indicating pipe is directly and vertically fixed on each of the straight pipe and the curved pipe.
Optionally, the liquid indication pipe and the curved arc pipe are fixed together by bonding or welding, and the liquid indication pipe and the straight pipe are fixed together by bonding or welding.
Optionally, the liquid indication pipe and the curved arc pipe are integrally formed, and the liquid indication pipe and the straight pipe are integrally formed.
Optionally, the straight tube, the curved tube and the liquid indication tube are all glass tubes.
The straight pipe, the curved pipe and the liquid indicating pipe have various realization forms, the device preferentially uses the straight pipe, the curved pipe and the liquid indicating pipe which are made of glass materials, meanwhile, the straight pipe and the curved pipe are integrally formed, and the liquid indicating pipe, the straight pipe and the curved pipe are integrally formed.
The preferred embodiment of the scheme is that the curved arc pipe and the straight pipe are fixed together in an integrated forming mode, and then the curved arc pipe and the straight pipe are respectively and vertically fixed with one liquid indicating pipe.
The utility model has the advantages that: the straight pipe and the curved pipe are used for simulating the lower plane and the upper cambered surface of the wing, meanwhile, the straight pipe and the curved pipe are provided with the liquid indicating pipe, and the air pressure difference between the upper cambered surface and the lower plane of the wing is vividly displayed through the height of water in the liquid indicating pipe.
Description of the drawings:
FIG. 1 is a schematic view of a wing lift demonstration device;
fig. 2 is a working principle diagram of the wing lift demonstration device.
The figures are numbered: 1. straight tube, 2, curved tube, 3, liquid indicating tube, 4, water tank, 5, water, 6 and rubber film. 7. A scale plate.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the device comprises a glass circular arc tube 2, a glass straight tube 1, and two glass liquid indicating tubes 3, wherein the circular arc tube 2 is fixed on the straight tube 1, the circular arc tube 2 is communicated with the straight tube 1, the circular arc tube 2 and the straight tube 1 are respectively and vertically fixed with one liquid indicating tube 3, and the circular arc tube 2 and the straight tube 1 are both communicated with the liquid indicating tube 3 connected with each other.
The working principle of the device is shown in the attached figure 2, the circular arc pipe 2 and the straight pipe 1 are both positioned above the water tank 4, the circular arc pipe 2 and the straight pipe 1 are both parallel to the liquid level in the water tank 4, and the liquid display pipe 3 is vertically erected in water 5.
As shown in figure 2, in order to measure the height of the liquid column in the liquid indicating tube, a scale plate 7 can be arranged on the water tank 4 for observing the number. In addition, the liquid column can not keep the height when no air flow exists in the tube, so that certain inconvenience is brought to teaching demonstration. Therefore, when the device is used, the rubber film 6 can be additionally arranged at the bottom of the water tank, and the two liquid indicating tubes are pressed downwards after a liquid column appears, so that the openings of the liquid indicating tubes can be sealed, the liquid column is kept all the time, and the observation is convenient.
The above only is the preferred embodiment of the present invention, not therefore the limit the patent protection scope of the present invention, all applications the equivalent structure transformation made by the contents of the specification and the drawings of the present invention is directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (6)
1. The wing lift force demonstration device is characterized by comprising a straight pipe, an arc bending pipe and at least two transparent and hard liquid indication pipes, wherein the arc bending pipe and the straight pipe are both hard pipes, two pipe orifices of the arc bending pipe are directly or indirectly matched and fixed with the straight pipe together, the arc bending pipe is communicated with the straight pipe, the arc bending pipe and the straight pipe are directly or indirectly vertically fixed with the at least one liquid indication pipe, and the arc bending pipe and the straight pipe are communicated with the connected liquid indication pipes.
2. The airfoil lift demonstration device of claim 1 wherein the curved tube is secured directly to the straight tube.
3. The airfoil lift demonstration device of claim 2 wherein the curved tube and the straight tube are secured together by welding or adhesive bonding.
4. The airfoil lift demonstration device of claim 1 wherein a liquid indicator tube is directly and vertically secured to each of the straight tube and the curved tube.
5. The airfoil lift demonstration device of claim 4 wherein the liquid indicator tube is adhesively or weldingly secured to the curved tube and the liquid indicator tube is adhesively or weldingly secured to the straight tube.
6. The airfoil lift demonstration device of claim 4 wherein the liquid indicator tube is integrally formed with the curved arc tube and the liquid indicator tube is integrally formed with the straight tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920411547.9U CN210073072U (en) | 2019-03-28 | 2019-03-28 | Wing lift force demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920411547.9U CN210073072U (en) | 2019-03-28 | 2019-03-28 | Wing lift force demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210073072U true CN210073072U (en) | 2020-02-14 |
Family
ID=69434866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920411547.9U Expired - Fee Related CN210073072U (en) | 2019-03-28 | 2019-03-28 | Wing lift force demonstration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210073072U (en) |
-
2019
- 2019-03-28 CN CN201920411547.9U patent/CN210073072U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200214 |