CN203931279U - Airplane ascensional force is probed into device - Google Patents
Airplane ascensional force is probed into device Download PDFInfo
- Publication number
- CN203931279U CN203931279U CN201420196107.3U CN201420196107U CN203931279U CN 203931279 U CN203931279 U CN 203931279U CN 201420196107 U CN201420196107 U CN 201420196107U CN 203931279 U CN203931279 U CN 203931279U
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- vertical rods
- wing model
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- wing
- cylindrical shell
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Abstract
A kind of airplane ascensional force is probed into device, comprise wing model (8), cross-under two vertical rods (13 and 10) and the base 2 in former and later two through holes of wing model (9), it is characterized in that: described wing model (8) is placed in transparent wind-tunnel cylindrical shell (4), the downside of described two vertical rods is provided with the flat back up pad (6) of the smooth lower surface of support machine wing model, and the upside of described two vertical rods is provided with the arc (11) of support machine wing model projecting surface while putting upside down; The two ends up and down of described two vertical rods are connected in wind-tunnel cylindrical shell (4) slidably by elastic connecting device respectively, described wind-tunnel cylindrical shell (4) annular inner wall is provided with the sliding tray (5) of depression, so that two vertical rods (13 and 10) can be rotated around the axis of wind-tunnel cylindrical shell (4) under external force together with wing model (8).Advantage is: convert four angles and verify bernoulli principle, not only strict logic, scientific high, cogency strong, interesting high.
Description
Technical field
The utility model relates to a kind of physical teaching aid of understanding bernoulli principle, and particularly airplane ascensional force is probed into device.
Background technology
In physics teaching, for allow students bernoulli principle, understand the reason that airplane ascensional force produces, so airplane ascensional force experiment becomes important experiment, experimental principle is: aircraft wing model is made of foam, its lower surface is smooth, upper surface is outwardly.Under the blowing of the wind of sending here at blower fan, air is fast at the upper surface place of evagination flow velocity, and pressure is little, and lower surface is smooth, and air velocity is little, and wing is subject to pressure difference upwards, produces lift upwards, so there is the phenomenon that wing moves up along the body of rod.
In existing experiment, wing model can not or be inconvenient to take out put upside down, so can only merely demonstrate out the phenomenon that can wing rise, cogency is inadequate; The particularly experimental provision of some producer, deliberately places wing dropping with windward, utilizes the reacting force between wing lower surface and air to impel wing to move up, this cheating mode is seriously run counter to scientific spirit, it's a pity, over several years, no one finds and proposes unexpectedly.
Applicant thinks, to really prove the experimental phenomena that the shape difference of wing upper and lower surface causes, just answer control variable, give counterevidence out: if the upper surface of wing is smooth, lower surface protrudes, namely wing is put upside down, in the air of rapid flow, demonstrate out wing can decline, if the upper and lower surface of wing is all burnishing surfaces, to demonstrates out wing model and not rise and also do not decline.
Utility model content
The purpose of this utility model is: for overcoming above-mentioned difficulties, provide a kind of airplane ascensional force to probe into device, in experimentation, rotatable wing and wing support, demonstrate out wing under various states such as just putting, put upside down, tilt to put, wing moving direction can become thereupon; Even can demonstrate out in the time that wing upper and lower surface is identical burnishing surface the wing phenomenon also not declining that neither rises.
For addressing the above problem, the technical scheme that the utility model adopts is: a kind of airplane ascensional force is probed into device, comprise wing model (8), two vertical rods (13 and 10) of cross-under in former and later two through holes of wing model (9), and base 2, it is characterized in that: described wing model (8) is placed in transparent wind-tunnel cylindrical shell (4), the downside of described two vertical rods is connected to the two ends of flat back up pad (6), flat back up pad (6) is for the smooth lower surface of support machine wing model, the upside of described two vertical rods is connected to the two ends of arc (11), arc (11) matches with the radian that wing model (8) upper surface protrudes, for supporting the wing model of putting upside down, the two ends up and down of described two vertical rods are connected in wind-tunnel cylindrical shell (4) slidably by elastic connecting device respectively, described wind-tunnel cylindrical shell (4) annular inner wall is provided with the sliding tray (5) of depression, so that two vertical rods (13 and 10) can be rotated around the axis of wind-tunnel cylindrical shell (4) under external force together with wing model (8).
As improvement, the two ends of described flat back up pad (6) are removably connected between two vertical rods (13 and 10) by screw (12), the two ends of described arc (11) are removably connected between two vertical rods (13 and 10) by screw (12), and the corresponding site of two vertical rods has the hole of passing for screw (12).
As further improvement, described elastic connecting device is the spring (7) that is socketed in vertical rod end.
As further improving, described wing model also includes: upper and lower surface is the foam block (14) of burnishing surface.
Adopt after said structure:
Wing is just put to (flat under epirelief), started blower fan air-supply, can be observed wing and rise in wind-tunnel.
Manual rotation vertical rod, while making wing put (upper flat lower protruding) upside down, can verify that wing can not rise.
In experimentation, if in vertical plane rotating upright post and wing, can be observed wing all the time to surface protrude direction side shifting.
If wing is replaced with to upper and lower surface and is the foam block of burnishing surface, can find that foam block can not rise.
The beneficial effects of the utility model are: ingenious employing control variate method, convert four angles and verify bernoulli principle, not only strict logic, science is high, cogency is strong, also improve the interest of experiment, as magnetite, attracting student to explore mysterious physical world, have advantages of simple in structure, cost is low, experiment effect is remarkable, be easy to promote.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model (wing is just put);
Fig. 2 is structural representation of the present utility model (making wing put upside down after rotation);
Fig. 3 be structural representation of the present utility model (with upper and lower surface all smooth foam block replace wing);
In figure: 1 blower fan, 2 bases, 3 air outlets, 4 wind-tunnel cylindrical shells, 5 sliding trays, 6 flat back up pads, 7 springs, 8 wing models, 9 through holes, 10 rear vertical rods, 11 arcs, 12 screws, 13 front vertical rods, 14 foam blocks.
Embodiment
As shown in Figure 1 and Figure 2, on base (2), be fixed with blower fan (1), air outlet (3), transparent wind-tunnel cylindrical shell (4), in wind-tunnel cylindrical shell (4), be placed with wing model (8), support and limit front vertical rod (13) and the rear vertical rod (10) of its motion direction.The downside of front vertical rod (13) and rear vertical rod (10) two vertical rods is connected to the two ends of flat back up pad (6), and flat back up pad (6) is for the smooth lower surface of support machine wing model (8); The upside of two vertical rods is connected to the two ends of arc (11), and arc (11) matches with the radian that wing model (8) upper surface protrudes, for supporting the wing model of putting upside down.
The end at the two ends up and down of two vertical rods is socketed with respectively Compress Spring, the annular inner wall of wind-tunnel cylindrical shell (4) correspondence position is provided with the sliding tray (5) of depression, so that two vertical rods (13 and 10) are rotated around the axis of wind-tunnel cylindrical shell (4) under external force, thereby change the inclination angle, left and right of wing model, until Rotate 180 degree, wing model is put upside down, as shown in Figure 2.
For ease of fitting machine wing model (8), the two ends of flat back up pad (6) can removably be connected between two vertical rods (13 and 10) by screw (12), and the corresponding site of two vertical rods has the hole of passing for screw (12); In like manner, the two ends of arc (11) are also removably connected between two vertical rods (13 and 10) by screw (12).
As shown in Figure 3, wing model also comprises: upper and lower surface is the foam block 14 of burnishing surface.
Claims (4)
1. an airplane ascensional force is probed into device, comprise wing model (8), two vertical rods (13 of cross-under in former and later two through holes of wing model (9), 10), and base (2), it is characterized in that: described wing model (8) is placed in transparent wind-tunnel cylindrical shell (4), the downside of described two vertical rods is connected to the two ends of flat back up pad (6), flat back up pad (6) is for the smooth lower surface of support machine wing model, the upside of described two vertical rods is connected to the two ends of arc (11), arc (11) matches with the radian that wing model (8) upper surface protrudes, for supporting the wing model of putting upside down, the two ends up and down of described two vertical rods are connected in wind-tunnel cylindrical shell (4) slidably by elastic connecting device respectively, described wind-tunnel cylindrical shell (4) annular inner wall is provided with the sliding tray (5) of depression, so that two vertical rods (13,10) can be rotated around the axis of wind-tunnel cylindrical shell (4) under external force together with wing model (8).
2. airplane ascensional force as claimed in claim 1 is probed into device, it is characterized in that: the two ends of described flat back up pad (6) are removably connected between two vertical rods (13,10) by screw (12), the two ends of described arc (11) are removably connected between two vertical rods (13,10) by screw (12), and the corresponding site of two vertical rods has the hole of passing for screw (12).
3. airplane ascensional force as claimed in claim 2 is probed into device, it is characterized in that: described elastic connecting device is the spring (7) that is socketed in vertical rod end.
4. airplane ascensional force as claimed in claim 3 is probed into device, it is characterized in that: described wing model also includes: upper and lower surface is the foam block (14) of burnishing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196107.3U CN203931279U (en) | 2014-04-22 | 2014-04-22 | Airplane ascensional force is probed into device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420196107.3U CN203931279U (en) | 2014-04-22 | 2014-04-22 | Airplane ascensional force is probed into device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203931279U true CN203931279U (en) | 2014-11-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420196107.3U Expired - Fee Related CN203931279U (en) | 2014-04-22 | 2014-04-22 | Airplane ascensional force is probed into device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203931279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108961955A (en) * | 2018-07-26 | 2018-12-07 | 王小兰 | It is a kind of for demonstrating the device of bernoulli principle |
-
2014
- 2014-04-22 CN CN201420196107.3U patent/CN203931279U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108961955A (en) * | 2018-07-26 | 2018-12-07 | 王小兰 | It is a kind of for demonstrating the device of bernoulli principle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150422 |
|
| EXPY | Termination of patent right or utility model |