CN204189352U - A kind of Magnus effect demonstrator - Google Patents
A kind of Magnus effect demonstrator Download PDFInfo
- Publication number
- CN204189352U CN204189352U CN201420559222.2U CN201420559222U CN204189352U CN 204189352 U CN204189352 U CN 204189352U CN 201420559222 U CN201420559222 U CN 201420559222U CN 204189352 U CN204189352 U CN 204189352U
- Authority
- CN
- China
- Prior art keywords
- direct current
- current generator
- bottom plate
- demonstration
- air flow
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model belongs to teaching demonstration technical field of experiment equipment, is specially a kind of Magnus effect demonstrator.This Magnus effect demonstrator by demonstration trolley, rotating part, air flow source and power supply four part form; Demonstration trolley comprises car bottom plate, wheel and wheel shaft; Rotating part is made up of direct current generator, pallet and rotating cylinder; Air flow source is configured to propping up by fan; Power supply is made up of big current rechargeable cell, and electric current divides two-way to export, and a road powers to DC fan, and a road powers to direct current generator; To being in series with a reversing switch in the circuit that direct current generator is powered, commutated by switch, the direction of current flowing through direct current generator can be changed, thus change the sense of rotation of rotating cylinder, control demonstration trolley with this advance or retreat, thus more thorough annotation knowwhy point.This instrument volume is little, easy to carry, easy and simple to handle, and good stability, interest are strong, is applicable to being carried to classroom and does to demonstrate with hall.
Description
Technical field
The utility model belongs to teaching demonstration technical field of experiment equipment, is specifically related to a kind of Magnus effect that utilizes as the demonstrator of power.
Background technology
According to fluid mechanics, when a cylindrical or spheroidal object limit rotates around self axle, time moving in a fluid in limit, due to the viscous effect of fluid, the circulation identical with rotation direction will be formed around object, in the reference system with object movement, this circulation is superimposed upon on oncoming air-flow, finally around object, form asymmetric steady gas flow, pressure difference is formed in object both sides, cause on the direction all vertical with axis of rotation direction with object moving direction, occur a transverse force, this phenomenon claims Magnus effect, tennis, " loop drive " in table tennis, phenomenons such as " curved shots " in football, all because Magnus effect causes.
Magnus effect is an important knowledge point in Hydrodynamics Theory, also a lot of application is had in life, but due to its theoretical abstraction, student has very large difficulty in understanding, be badly in need of having a good demonstration instrument to be annotated theory, this blank filled up just by this instrument, have received good classroom teaching effect.
Summary of the invention
It is little, easy to carry, simple to operate that the purpose of this utility model is to provide a kind of volume, and good stability, interest are strong, the instrument of demonstration Magnus effect that can be clear on classroom, clear.
The instrument of the demonstration Magnus effect that the utility model provides, its structure as shown in Figure 1, is made up of demonstration trolley 1, rotating part 2, air flow source 3, power supply 4; Wherein:
Described demonstration trolley 1(is as shown in Figure 2), comprise car bottom plate 5, wheel 6 and wheel shaft 7 three parts, car bottom plate 5
Be made up of light rigid materials, wheel 6 should adopt light material, and axletree 7 passes and is fixedly connected with between car bottom plate with wheel 6 below car bottom plate 5;
Described rotating part 2(as shown in Figure 3), be made up of direct current generator 8, pallet 9 and rotating cylinder 10, wherein direct current generator 8 lower end is fixed on car bottom plate 5, direct current generator 8 upper end rotating shaft is fixedly connected with pallet 9 lower sleeve, rotating cylinder 10 is made up of rigid material, for cylindrical shape, rotating cylinder 10 lower end is fixed on round tray 9;
Described air flow source 3(is as shown in Figure 4), be made up of fan 11 and support 12, support 12 is rigidity, is fixed on the car bottom plate 5 of demonstration trolley; Fan 11 is fixed on support 12;
Described power supply 4 is made up of big current rechargeable cell, electric current divides two-way to export, one tunnel powers to DC fan 11, one tunnel powers to direct current generator 8, to a reversing switch of having connected in the circuit that direct current generator 8 is powered, is commutated by switch, the direction of current flowing through direct current generator can be changed, thus change the sense of rotation of rotating cylinder 10, control demonstration trolley with this and advance or retreat, thus more thorough annotation knowwhy point.
In the utility model, rotating part 2, air flow source 3 and power supply 4 are all positioned at the middle part of demonstration trolley car bottom plate 5, and wherein rotating part 2 and air flow source 3 are perpendicular to car body, place in opposite directions.
The utility model is by powering to fan and direct current generator, rotating cylinder rotates in the air-flow of fan, from Hydrodynamics Theory, now by generation magnus force along demonstration trolley direction, this tries hard to recommend dynamic moving of car, therefore, dolly effect is here the carrier of demonstration Magnus effect.
During demonstration, open two contactors respectively, then magnus force is along demonstration trolley direction, and demonstration trolley moves forwards or backwards under the effect of this power.
The utility model utilizes pallet 9 to connect direct current generator 8 and cylindrical drum 10, can ensure its stable rotation.
The utility model is placed fan 11 and rotating cylinder 10 in opposite directions, makes the rotating cylinder 10 of rotation be in the air-flow of motion, manufactures the condition that Magnus effect produces.
Magnus effect is converted to the method for moving of car by the utility model, make the demonstrative process of principle obviously, vivid and interesting.
The utility model is all placed in rotating part 2, air flow source 3 and power supply 4 on demonstration trolley 1 base plate, makes apparatus for demonstrating compact conformation, compact.
The utility model utilizes reversing switch to control dolly and can move along both direction, has enriched demo content.
Accompanying drawing explanation
Fig. 1 is this Magnus effect demonstrator structure diagram.
Fig. 2 is the structural drawing of demonstration trolley.
Fig. 3 is the structural drawing of rotating part.
Fig. 4 is the structural drawing of air flow source
Number in the figure: 1 is demonstration trolley, 2 is rotating part, and 3 is air flow source, and 4 is power supply, and 5 is demonstration trolley base plate, and 6 is wheel, and 7 is axletree, and 8 is direct current generator, and 9 is pallet, and 10 is rotating cylinder, and 11 is DC fan, and 12 is blower tray.
Embodiment
The apparatus for demonstrating of the Magnus effect that the utility model provides, be made up of demonstration trolley 1, rotating part 2, air flow source 3, power supply 4, structure as shown in Figure 1.Wherein:
Demonstration trolley 1(is as shown in Figure 2), comprise car bottom plate 5, wheel 6 and wheel shaft 7 three parts.For reducing the demand to power, the material of demonstration trolley each several part all will be tried one's best gently, car bottom plate must be rigidity, thickness no requirement (NR), do not occur premised on deformation in moving, size is not strict with, but too conference is too heavy, too little, affect demonstrating effect, the size that this device adopts is 30cm*20cm; Wheel should adopt light material, and size is not strict with, and this device adopts the rubber wheel of toy car, diameter 9cm; Axletree adopts lightweight stiff rod, and this device adopts stainless steel wire, and axletree passes and is fixedly connected with between car bottom plate with wheel below car bottom plate.
Rotating part 2(is as shown in Figure 3), be made up of direct current generator 8, pallet 9 and column type rotating cylinder 10.Direct current generator needs to do High Rotation Speed stably, and this device adopts Rated motor voltage 9v, rotating speed 20000r/mim; For ensure drum rotation time can be steady, be fixedly connected with by pallet between rotating cylinder with motor shaft.Motor lower end is fixed on the base plate of demonstration trolley, and the rotating shaft of upper end is placed in the sleeve of pallet lower end, and above pallet, disk internal diameter and cylindrical barrels external diameter match, and for ensureing the stability connected, pallet should adopt metal material; The diameter of rotating cylinder, thickness and highly all without strict demand, but obtain stable air-flow for ensureing, rotating cylinder should be undeformed in rotation, and this device rotating cylinder adopts organic glass cylinder, external diameter 10cm, height 15cm.
Air flow source 3(is as shown in Figure 4), be made up of powerful DC fan 11 and support 12.Electric fan diameter should be similar with basket diameter, power is the bigger the better, this device adopts 12v, 50w DC fan, be fixedly connected with between support with fan, its effect has two, ensures that fan wind is to stable first, second can by the height of design support, ensure height and the rotating cylinder matched of fan air-out, this appliance stand adopts metal material, and lower end is fixed on demonstration trolley base plate.
Power supply 4, power supply is made up of big current rechargeable cell, and this device adopts the serial battery of 3 joint 4.5v, 3.7A, for fan powers (being fixed in battery case); Adopt the serial battery of 2 joint 4.5v, 3.7A, for direct current generator is powered (being fixed in battery case), two battery cases are adhesive into one, and are fixed on demonstration trolley base plate.To a reversing switch of having connected in the circuit that direct current generator is powered, commutated by switch, the direction of current flowing through direct current generator can be changed, thus change the sense of rotation of rotating cylinder, control demonstration trolley with this advance or retreat, thus more thorough annotation knowwhy point.
Rotating part 2, air flow source 3 and power supply 4 are all positioned at the middle part of demonstration trolley base plate, and wherein rotating part and air flow source perpendicular to car body, should be placed in opposite directions.During demonstration, open two contactors respectively, then magnus force is along demonstration trolley direction, and demonstration trolley moves forwards or backwards under the effect of this power.
Claims (1)
1. a Magnus effect demonstrator, is characterized in that being made up of demonstration trolley, rotating part, air flow source, power supply; Wherein:
Described demonstration trolley, comprises car bottom plate, wheel and wheel shaft three parts, and axletree passes and is fixedly connected with between car bottom plate with wheel below car bottom plate;
Described rotating part, is made up of direct current generator, pallet and rotating cylinder, wherein, direct current generator lower end is fixed on car bottom plate, and the rotating shaft of direct current generator upper end is fixedly connected with pallet lower sleeve, and rotating cylinder is made up of rigid material, for cylindrical shape, rotating cylinder lower end is fixed on round tray;
Described air flow source, be configured to propping up by fan, support is rigidity, is fixed on the car bottom plate of demonstration trolley; Fan is fixed on support;
Described power supply is made up of big current rechargeable cell, and electric current divides two-way to export, and a road powers to DC fan, and a road powers to direct current generator; To being in series with a reversing switch in the circuit that direct current generator is powered, being commutated by switch, the direction of current flowing through direct current generator can be changed, thus change the sense of rotation of rotating cylinder, control demonstration trolley with this and advance or retreat;
Described rotating part, air flow source and power supply are positioned at the middle part of demonstration trolley car bottom plate, and wherein rotating part and air flow source are perpendicular to car body, place in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559222.2U CN204189352U (en) | 2014-09-27 | 2014-09-27 | A kind of Magnus effect demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559222.2U CN204189352U (en) | 2014-09-27 | 2014-09-27 | A kind of Magnus effect demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204189352U true CN204189352U (en) | 2015-03-04 |
Family
ID=52621331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420559222.2U Withdrawn - After Issue CN204189352U (en) | 2014-09-27 | 2014-09-27 | A kind of Magnus effect demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204189352U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269089A (en) * | 2014-09-27 | 2015-01-07 | 复旦大学 | Magnus effect demonstration instrument |
| CN108654046A (en) * | 2018-04-26 | 2018-10-16 | 刘庆连 | Ball lift launching simulation equipment based on Magnus hydrodynamic effect |
-
2014
- 2014-09-27 CN CN201420559222.2U patent/CN204189352U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269089A (en) * | 2014-09-27 | 2015-01-07 | 复旦大学 | Magnus effect demonstration instrument |
| CN104269089B (en) * | 2014-09-27 | 2016-08-24 | 复旦大学 | A kind of Magnus effect demonstrator |
| CN108654046A (en) * | 2018-04-26 | 2018-10-16 | 刘庆连 | Ball lift launching simulation equipment based on Magnus hydrodynamic effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205959478U (en) | Higher mathematics three -dimensional scale model display device that imparts knowledge to students | |
| CN203910149U (en) | Cam teaching device | |
| CN204189352U (en) | A kind of Magnus effect demonstrator | |
| CN206331703U (en) | Electrostatic power machine experiment instrument | |
| CN104269089B (en) | A kind of Magnus effect demonstrator | |
| CN206217435U (en) | A kind of blackboard for education of convenient use | |
| CN206040001U (en) | High school physics experiment analogue means | |
| CN106846996A (en) | A kind of special model display device of mathematical education | |
| CN202352186U (en) | Portable angular momentum conservation apparatus | |
| CN203405991U (en) | Gas suspended globe | |
| CN105023483A (en) | Aircraft lift experimental instrument for multi-angle researches | |
| CN203607000U (en) | Whirlpool demonstration instrument | |
| CN203520726U (en) | Magnetic suspension wind wheel | |
| CN201429922Y (en) | Demonstration instrument for simulating magnetically levitated train | |
| CN208298406U (en) | A kind of Political Education of College Students Multifunctional demonstrator | |
| CN204351318U (en) | Integral intelligent Electronic platform | |
| CN209388540U (en) | A kind of high school mathematics teaching aid | |
| CN206388401U (en) | A kind of energy transformation demonstration apparatus | |
| CN205247720U (en) | Physical teaching uses multi -functional experimental apparatus | |
| CN202838747U (en) | Area relationship demonstrator for triangles with equal bottoms and equal heights | |
| CN204537497U (en) | A kind of chest, belly auscultation simulated training table | |
| CN204884324U (en) | High school physics speed experiment analogue means | |
| CN203931279U (en) | Airplane ascensional force is probed into device | |
| CN204965849U (en) | Salt solution electricity generation dolly | |
| CN205122026U (en) | Energy conversion demonstrating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |