CN206833773U - A kind of Magnus effect demonstrator - Google Patents
A kind of Magnus effect demonstrator Download PDFInfo
- Publication number
- CN206833773U CN206833773U CN201720339305.4U CN201720339305U CN206833773U CN 206833773 U CN206833773 U CN 206833773U CN 201720339305 U CN201720339305 U CN 201720339305U CN 206833773 U CN206833773 U CN 206833773U
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- China
- Prior art keywords
- housing
- direct current
- output shaft
- generator
- magnus effect
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- Expired - Fee Related
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- 230000000694 effects Effects 0.000 title claims abstract description 39
- 238000009434 installation Methods 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of Magnus effect demonstrator, it is characterized in that, including base, the support being fixedly connected on base, the generator of installation on the bracket, the housing being fixedly connected on generator output shaft, one group of direct current generator in the housing is set, and one group of cylinder blade being connected with direct current generator output shaft；The cylinder blade is vertically arranged with generator output shaft, and the direction of rotation of one group of cylinder blade is opposite.The apparatus structure is simple and reliable, convenient demonstration；Traditional flatly moving type demonstrator is changed into rotary type, presentation space is reduced, improves the simplicity used；External display instrument can significantly more demonstrate out relevant physical phenomena with sxemiquantitative, and teaching demonstration effect is preferable.
Description
Technical field
The utility model belongs to teaching demonstration experimental facilities, and in particular to a kind of Magnus effect demonstrator.
Background technology
In hydrodynamics, Magnus effect refers to be in the rotary body in flow field, when its angular velocity of rotation direction and
When flow field direction of flow is inconsistent, it can be acted on perpendicular to both directions by a power, this power is magnus force.
Magnus effect is a kind of performance of the Bernoulli effect in increasingly complex flow field.
Either in hydromechanical theoretical research, or in daily life application, Magnus effect is all one
Individual important knowledge point, but its theoretical abstraction, do not allow in daily teaching middle school student it is readily understood, thus need one can be intuitively effective
Demonstration Magnus effect instrument.
Utility model content
Purpose of utility model：In order to solve the defects of Magnus effect in daily teaching is not easy demonstration, design is a kind of
Facilitate the Magnus effect demonstrator of experimental teaching ocular demonstration.
Technical scheme：A kind of Magnus effect demonstrator of the present utility model, including base, are fixedly connected on base
Support, generator on the bracket is installed, the housing being fixedly connected on generator output shaft, set in the housing
One group of direct current generator, and one group of cylinder blade being connected with direct current generator output shaft；The cylinder blade and generator
Output shaft is vertically arranged, and the direction of rotation of one group of cylinder blade is opposite.
Preferably, the cylinder blade is two, and geomery is identical, using generator output shaft as symmetry axis pair
Claim on the horizontal axis of housing, and direction of rotation is opposite；Ensure the Magnus effect demonstrator in the condition do not blown
Under balance, and ensure demonstration when rotating mechanism smoothly rotate so that demonstrating effect is more preferable.
Further, in addition to generator electrode the display instrument being connected, the display instrument are voltmeter or oscillograph；
, can be by this physics of Magnus effect by range value of the size of voltmeter throw of pointer or oscilloscope display waveform etc.
The demonstration of the sxemiquantitative of visual phenomenon comes out, and reaches preferable teaching demonstration effect.
Further, the adjustable resistance of regulation direct current generator angular velocity of rotation, the main body position of the adjustable resistance are included
In in housing, adjustable side is exposed outside housing；The service life of adjustable resistance can be extended, and can easily be accommodated the resistance of adjustable resistance
Value.
Preferably, the housing is square metal box, and direct current generator is symmetricly set in two inside sidewalls of rectangular box.
Another embodiment, a kind of Magnus effect demonstrator, including base, the support being fixedly connected on base, peace
The generator of dress on the bracket, the housing being fixedly connected on generator output shaft, sets direct current generator in the housing
Component, and the cylinder blade being connected with direct current generator output shaft；The cylinder blade is vertical with generator output shaft to be set
Put.
The DC motor assembly includes one group of direct current generator, and to the power supply of direct current generator power supply, control direct current generator is opened
The switching device of off status, and the adjustable resistance of regulation direct current generator angular velocity of rotation.
Preferably, direct current generator and the cylinder blade is two, and two cylinder blades are arranged on housing
On same level axis, and direction of rotation is opposite；Ensure the balance of the Magnus effect demonstrator under conditions of not blowing,
And ensure that rotating mechanism smoothly rotates during demonstration so that demonstrating effect is more preferable.
Further, the demonstrator also includes the display instrument being connected with generator electrode, and the display instrument is voltmeter
Or oscillograph；By range value of the size of voltmeter throw of pointer or oscilloscope display waveform etc., Magnus can be imitated
Answer the demonstration of this physical phenomenon intuitively sxemiquantitative to come out, reach preferable teaching demonstration effect.
Further, the adjustable resistance of regulation direct current generator angular velocity of rotation, the main body position of the adjustable resistance are included
In in housing, adjustable side is exposed outside housing；The service life of adjustable resistance can be extended, and can easily be accommodated the resistance of adjustable resistance
Value.
Preferably, the main body of the switching device is located in housing, and shift knob exposes the outside of rectangular box, can protect
Switching device circuit not sensitive for damages, and switching manipulation is convenient.
Beneficial effect：A kind of Magnus effect demonstrator of the present utility model, material therefor are lower-cost stainless
Steel, plastics etc., apparatus structure is simple and reliable, convenient demonstration；By plain vane, traditional flatly moving type demonstrator is changed into
Rotary type so that space needed for demonstration reduces, and improves the simplicity used；It is electromechanical from generating electricity by installing master section additional
Ammeter or oscillograph are run wires on extremely, relevant physical phenomena can significantly more be demonstrated out with sxemiquantitative, such as voltage list index
Size and oscilloscope display waveform range value etc., there is provided direct feel, teaching demonstration effect are preferable.
Brief description of the drawings
Fig. 1 is the structural representation of Magnus effect demonstrator；
Fig. 2 is Fig. 1 front view；
Fig. 3 is Fig. 1 left view.
Embodiment
The utility model is described in detail below in conjunction with the accompanying drawings.
The principle of Magnus effect：
By theory deduction, when preferable rotating cylindrical body is in the flow field that flow velocity is V, suffered lift is：
L=2 π κ ρ V ω lr2
Wherein κ is the coefficient related to rotating cylindrical body surface characteristic, and ρ is fluid density, and ω is rotating cylindrical body angle speed
Degree, l is rotating cylindrical body length, and r is rotating cylindrical body radius.
It can be seen that flow velocity V and rotational speed omega need to be changed, you can the size of magnus force suffered by change.
As shown in Figures 1 to 3, a kind of Magnus effect demonstrator includes base 1, support 2, generator 3, housing 4, cylinder
Body blade 5 and direct current generator 6.
The generator is fixed on base by support, and the output shaft of generator is connected with housing, and housing can be around generating
Machine output shaft freely rotates；As shown in Fig. 2 two cylinder blades be located on the horizontal axis of housing respectively with two direct currents
The output axis connection of machine, and be symmetrical arranged using generator output shaft as symmetry axis, and it is vertical with generator output shaft；Direct current generator
Power supply 7 be located at the outside of housing, adjust the main part of adjustable resistance 8 of direct current generator rotational angular velocity in the housing,
Adjustment portion is divided into outside housing, is easy to adjust the resistance of adjustable resistance；Control the master of the switching device 9 of direct current generator on off state
Body portion is located in housing, and shift knob is located at outside housing, securely and reliably, easy to operate.
As shown in figure 3, generator rear end is provided with electrode 31 and 32, (can not shown in figure by the external display instrument of electric wire
Go out), display instrument can be voltmeter or oscillograph.
In addition, two cylinder blades are vertically arranged with generator output shaft, and the angle between two cylinder blades
It can be any angle.
Another embodiment, a kind of Magnus effect demonstrator, including base, the support being fixedly connected on base, peace
The generator of dress on the bracket, the housing being fixedly connected on generator output shaft, sets direct current generator in the housing
Component, and the cylinder blade being connected with direct current generator output shaft；The cylinder blade is vertical with generator output shaft to be set
Put.
The DC motor assembly includes one group of direct current generator, and to the power supply of direct current generator power supply, control direct current generator is opened
The switching device of off status, and the adjustable resistance of regulation direct current generator angular velocity of rotation.
Direct current generator and the cylinder blade is two, and two cylinder blades are arranged on the same level of housing
On axis, and direction of rotation is opposite；Ensure the balance of the Magnus effect demonstrator under conditions of not blowing, and ensure to drill
Rotating mechanism smoothly rotates when showing so that demonstrating effect is more preferable；The main body of the adjustable resistance is located in housing, adjustable side dew
Go out outside housing；The service life of adjustable resistance can be extended, and can easily be accommodated the resistance of adjustable resistance.
The demonstrator also includes the display instrument being connected with generator electrode, can be voltmeter or oscillograph；Pass through electricity
The size of list index deflection or the range value etc. of oscilloscope display waveform are pressed, can this physical phenomenon be straight by Magnus effect
The demonstration of the sxemiquantitative of sight comes out, and reaches preferable teaching demonstration effect.
The cylinder blade can be one or more.
The model of direct current generator can be with identical with power；Power supply can be battery case or USB interface external power supply or
Other power supply modes；The geomery of cylinder blade is identical, and material is illustrated supplement paper or plastics etc.；So that apparatus structure is simple
It is single reliable, convenient demonstration.
The device direct current generator and generator are existing using in the market, wherein, direct current generator will guarantee at a high speed
Smoothly rotation, the embodiment select direct current generator voltage 5V, rotating speed 10000r/min under rated voltage；Generator uses NMB
ZA811-001 types, voltage 6V；From 220V, 50W alternating current fans；Power supply is that four section 1.5V battery is composed in series.
During demonstration, can peripheral hardware fan (not shown) as wind regime be the device air-supply, fan is arranged on housing
Front, opening switching device starts direct current generator, and cylinder blade rotates freely around the output shaft of direct current generator, and rotates
In the opposite direction；Fan to be opened to produce stable air-flow immediately ahead of housing, air-flow is uniformly flowed on cylinder blade, due to
Magnus effect, will produce makes cylinder blade around the torque of generator output shaft rotation, because two cylinder blades select
Select in the opposite direction, then caused torque is in opposite direction on two cylinder blades, so as to drive housing to turn around generator output shaft
It is dynamic, generator is sent alternating current；The alternating current is connected wires export, external voltage table or oscillograph by electrode, passes through voltage
The size of the list index anglec of rotation or the range value of oscilloscope display waveform carry out sxemiquantitative demonstration Magnus effect.
In addition, the size that fan blows out air velocity can be adjusted by the wind speed button of fan, or regulation adjustable resistance
To change the angular speed of cylinder blade rotation, the Magnus effect of different rotating speeds under different conditions is finally demonstrated out.
Claims (5)
- A kind of 1. Magnus effect demonstrator, it is characterised in that including base, the support being fixedly connected on base, installation Generator on the bracket, the housing being fixedly connected on generator output shaft, one group of direct current in the housing is set Machine, and one group of cylinder blade being connected with direct current generator output shaft；The cylinder blade is vertical with generator output shaft Set, the direction of rotation of one group of cylinder blade is opposite.
- 2. a kind of Magnus effect demonstrator according to claim 1, it is characterised in that the cylinder blade is two Individual, geomery is identical, is symmetrically set in using generator output shaft as symmetry axis on the horizontal axis of housing, and direction of rotation Conversely.
- 3. a kind of Magnus effect demonstrator according to claim 1, it is characterised in that also include and generator electrode The display instrument of connection, the display instrument are voltmeter or oscillograph.
- 4. a kind of Magnus effect demonstrator according to claim 1, it is characterised in that also include regulation direct current generator The adjustable resistance of angular velocity of rotation, the main body of the adjustable resistance are located in housing, and adjustable side is exposed outside housing.
- 5. a kind of Magnus effect demonstrator according to claim 1, it is characterised in that the housing is square metal Box, direct current generator are symmetricly set in two inside sidewalls of rectangular box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720339305.4U CN206833773U (en) | 2017-04-01 | 2017-04-01 | A kind of Magnus effect demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720339305.4U CN206833773U (en) | 2017-04-01 | 2017-04-01 | A kind of Magnus effect demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206833773U true CN206833773U (en) | 2018-01-02 |
Family
ID=60768065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720339305.4U Expired - Fee Related CN206833773U (en) | 2017-04-01 | 2017-04-01 | A kind of Magnus effect demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206833773U (en) |
-
2017
- 2017-04-01 CN CN201720339305.4U patent/CN206833773U/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: 20180102 Termination date: 20190401 |