CN2184954Y - Turning table type conservation of angular momentum demonstrator - Google Patents
Turning table type conservation of angular momentum demonstrator Download PDFInfo
- Publication number
- CN2184954Y CN2184954Y CN 93247098 CN93247098U CN2184954Y CN 2184954 Y CN2184954 Y CN 2184954Y CN 93247098 CN93247098 CN 93247098 CN 93247098 U CN93247098 U CN 93247098U CN 2184954 Y CN2184954 Y CN 2184954Y
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- CN
- China
- Prior art keywords
- angular momentum
- garden
- conservation
- demonstrator
- wheel
- 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.)
- Expired - Fee Related
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model relates to a turning table type conservation of angular momentum demonstrator. A rigid body system is composed of an electric wheel car and a round table spindle a main shaft, and is arranged and fixed on a base with leveling screws. The electric wheel car uses a battery to drive a DC motor to run, uses the direct contact between a motor shaft and wheel edges to forming the friction transmission for deceleration, and rotate in a reverse direction by the friction moment generated by the contact between the wheels and the round table. The utility model has the advantages of small and exquisite design, convenient operation, stable rotating speed, and obvious demonstration effect, and can be matched with the can also be the multi-purpose rigid body rotating experimental device with the patent application number of 93218436.7 for quantitative verification of conservation of angular momentum law.
Description
Turntable type angular momentum conservation demonstration device belongs to instruments used for education, for the usefulness of institution of higher education's " general physics " teaching demonstration angular momentum conservation law.
In rigid dynamics, the original transfixion of rigid system, the summation of angular momentum is 0, if this system is not subjected to the moment of face effect, rotates and be subjected to the moment of resistance effect, the summation of their angular momentum is still 0, if a part of moment of inertia of this system is I1, angular velocity is ω 1, and the moment of inertia of another part is I2, angular velocity is ω 3, does the time spent at no moment of face so:
I1ω1＋I2ω2＝0
I1ω1＝－I2ω2
In the physics teaching in the past, can only be with illustration on the textbook and osmanthus figure explanation.One big garden platform is arranged among the figure, can be around a rotation.A people is arranged on the platform, when this person when edge of table is walked about in the counterclockwise direction, the garden platform will rotate along clockwise direction.Each university does not still have this type of miniature instrument at present, can be used to do this lecture experiment.
The purpose of this utility model is to develop a kind of instrument of compact volume and convenience, comes the angular momentum conservation law under the above-mentioned situation of demonstration and verification.
The utility model is made up of the electric vehicle of the first half and the garden platform of Lower Half, as shown in drawings.Battery (1) switch (2) direct current motor (3) and wheel (4) are arranged on the electric vehicle.The electric vehicle left end has axle sleeve (6) and bearing (7), and a pair of horizontal apertures is arranged on this axle sleeve, has a pair of horizontal screw (8) to be stuck in this hole on the electric vehicle shell, and electric vehicle can this screw be an axle, spins upside down.Direct current motor is installed in the electric vehicle right-hand member, can rotate up and down around horizontal screw (12), and the direct current motor end is held with spring, makes motor shaft and wheel (4) edge that excellent contact be arranged.Be with small rubber hose on the direct current drive arbor, with of the friction of increase axle with the wheel edge.Ball bearing (5) is housed on the axle sleeve at platform center, garden.Bearing (5) on bearing on the electric vehicle (7) and the garden platform is contained on the same main shaft (9), forms a rigid body system, and main shaft is installed on the base (10).Three adjusting screw (11) are arranged under the base, be used for garden platform leveling.During experiment, the energized switch, direct current motor rotates by friction belt for power transmission motor-car wheel, and meanwhile, the garden platform then gets up to opposite spin.
Characteristics of the present utility model are: (1) structure is small and exquisite, operates simple and easyly, and the demonstration effect is obvious, (2) stabilization of speed, and the moment of inertia of electric vehicle and garden platform can be more than 93218436.7 to measure with solid moment experimental device with number of patent application.Load onto the frequency modulated light sheet in electric vehicle end and garden edge of table, to how vertically install with omnipotent physical support with two photogate on the solid moment experimental device, with two digital timers, write down the revolution of interior electric vehicle of certain hour and garden platform, calculate the angular velocity of electric vehicle and garden platform, but quantitative verification angular momentum conservation law also.
Claims (3)
1, turntable type angular momentum conservation demonstration device is formed a rigid body system by electric vehicle and garden platform two parts, and it is characterized in that: the Electric Motor Wheel Vehicular battery is made the energy, and the direct current motor axle sleeve has proofed sleeve and wheel edge contact, and wheel vertically is pressed in the garden edge of table.
2, turntable type angular momentum conservation demonstration device as claimed in claim 1, wheel car and garden platform all by Bearing Installation on main shaft, the ball bearing apart from each other in the platform axle sleeve of garden.
3, turntable type angular momentum conservation demonstration device as claimed in claim 1 is equipped with leveling serew on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93247098 CN2184954Y (en) | 1993-12-11 | 1993-12-11 | Turning table type conservation of angular momentum demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93247098 CN2184954Y (en) | 1993-12-11 | 1993-12-11 | Turning table type conservation of angular momentum demonstrator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93218436 Division CN2190812Y (en) | 1993-07-12 | 1993-07-12 | Multipurpose rigid-body rotation experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2184954Y true CN2184954Y (en) | 1994-12-07 |
Family
ID=33819589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93247098 Expired - Fee Related CN2184954Y (en) | 1993-12-11 | 1993-12-11 | Turning table type conservation of angular momentum demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2184954Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938226A (en) * | 2012-11-27 | 2013-02-20 | 上海师范大学 | Comprehensive demonstration instrument for demonstrating angular momentum conservation and rotational inertia and demonstrating method thereof |
| CN103808445A (en) * | 2014-01-15 | 2014-05-21 | 洛阳理工学院 | Portable manual bearing starting friction moment detector |
| CN103943005A (en) * | 2014-04-24 | 2014-07-23 | 福建农林大学 | Multifunctional rigid body rotation and angular momentum theorem teaching demonstration instrument |
| CN104217631A (en) * | 2014-09-10 | 2014-12-17 | 中国地质大学（武汉） | Combined angular momentum theorem demonstrator |
| CN107123344A (en) * | 2017-06-07 | 2017-09-01 | 浙江大学城市学院 | A kind of new angular momentum conservation demonstration and quantitative determination experiment instrument |
| CN107862950A (en) * | 2018-01-09 | 2018-03-30 | 李新源 | Levelling device for conservation of momentum experiment |
| CN110136549A (en) * | 2019-05-21 | 2019-08-16 | 辽宁工程技术大学 | A kind of qualitative demonstration and quantitatively measuring device |
-
1993
- 1993-12-11 CN CN 93247098 patent/CN2184954Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938226A (en) * | 2012-11-27 | 2013-02-20 | 上海师范大学 | Comprehensive demonstration instrument for demonstrating angular momentum conservation and rotational inertia and demonstrating method thereof |
| CN103808445A (en) * | 2014-01-15 | 2014-05-21 | 洛阳理工学院 | Portable manual bearing starting friction moment detector |
| CN103808445B (en) * | 2014-01-15 | 2016-05-18 | 洛阳理工学院 | The manual detector of a kind of portable bearing starting friction moment |
| CN103943005A (en) * | 2014-04-24 | 2014-07-23 | 福建农林大学 | Multifunctional rigid body rotation and angular momentum theorem teaching demonstration instrument |
| CN104217631A (en) * | 2014-09-10 | 2014-12-17 | 中国地质大学（武汉） | Combined angular momentum theorem demonstrator |
| CN107123344A (en) * | 2017-06-07 | 2017-09-01 | 浙江大学城市学院 | A kind of new angular momentum conservation demonstration and quantitative determination experiment instrument |
| CN107862950A (en) * | 2018-01-09 | 2018-03-30 | 李新源 | Levelling device for conservation of momentum experiment |
| CN107862950B (en) * | 2018-01-09 | 2019-08-30 | 徐伟明 | Levelling device for conservation of momentum experiment |
| CN110136549A (en) * | 2019-05-21 | 2019-08-16 | 辽宁工程技术大学 | A kind of qualitative demonstration and quantitatively measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |