CN107085994A - Rotary inertia exploring instrument - Google Patents
Rotary inertia exploring instrument Download PDFInfo
- Publication number
- CN107085994A CN107085994A CN201710225671.1A CN201710225671A CN107085994A CN 107085994 A CN107085994 A CN 107085994A CN 201710225671 A CN201710225671 A CN 201710225671A CN 107085994 A CN107085994 A CN 107085994A
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- CN
- China
- Prior art keywords
- rotary inertia
- swing rod
- instrument
- pendulum mass
- shafting
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
- Educational Administration (AREA)
- Computational Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention provides a kind of rotary inertia exploring instrument, including the instrument body being made up of rotating mechanism, supporting mechanism and transmission mechanism, also include swing rod positioner, swing rod positioner is by location-plate, locating piece, alignment pin and inside and outside connects the detachable apparatus that block is constituted.Compared with existing physics educational apparatus, the present invention is made size of the instrument without artificially change rotary inertia in presentation process, more linked up using the agent structure of recyclable rotating rocking chair.Set on the basis of displaying rule and probe into part, allow student to be more conducive to cultivate innovative thinking for subject under discussion independent thoughts such as the formula of rotary inertia.
Description
Technical field
The present invention relates to a kind of physics exploration instrument, particularly a kind of rotary inertia exploring instrument.
Background technology
Physics is an experimental science, foundation, the discovery of each law of each concept in the history of physics, all
There is its solid Experimental Research basis.Inertia is measured when rotary inertia is rigid body pivoting, angle in spin dynamics
Color can be interpreted as to form inertia of the object for rotary motion, for setting up equivalent to the quality in linear dynamics
Relation between several amounts such as angular momentum, angular speed, torque and angular acceleration.At present with rotating used in the physics teaching of university
Measure related instrument mainly by three-line pendulum, the laboratory apparatus of test object rotary inertia size such as rock and strengthen student to this
The understanding of concept, but be all the formula for directly telling this physical quantity of student, the process that neither one guiding is probed into.And with rotation
The demonstration quasi-instrument such as related rogowski swivel chair of inertia, and the phenomenon demonstrated out is not probed into further.In addition,
These demonstration quasi-instruments are demonstrated for angular momentum conservation law mostly, need in presentation process artificial change rotary inertia
Size, presentation process not enough links up, phenomenon is also more dull.
The content of the invention
The main object of the present invention is the interest that observer is excited by the phenomenon in instrument presentation process, and then passes through parent
Expression formula J=mr of rotary inertia is probed into out from operating instrument2.In addition, it is temporary to embody vision in the presentation process of instrument
Stay, the physical phenomenon such as simple harmonic motion.
The object of the present invention is achieved like this：Including instrument body, swing rod positioner, transmission mechanism and data acquisition
Equipment.The instrument body includes upper shafting, support, swing rod, counterweight, lower shafting and base；The swing rod positioner can be inserted
Entering between upper shafting two connects block outside is used to quantitatively change swing rod angle；The transmission mechanism is located in base, and power transmission shaft can level
Mobile, outer end connects handwheel with shaft coupling or reducing motor is respectively suitable for demonstration and exploration stage；The data acquisition equipment
Including photoelectricity door and intelligent counter etc. it is measurable go out instrument rotation dish instantaneous angular velocity and angular acceleration.Also include being enclosed on
The blue line water droplet persistence of vision figure of black matrix made in rotation dish of Suzhou embroidery.
The concrete operations mode of the present invention is such：When using manpower driving, without installing swing rod positioner, pass
Moving axis outer end connects handwheel, swing rod is screwed into symmetrical two screwed hole of upper lift ring, and match somebody with somebody the weight of phase homogenous quantities in swing rod end
Code, now swing rod can perpendicular optional position it is stable, power transmission shaft is pushed into two bevel gears with hand and engages and shakes, instrument
Power transmission shaft is pulled out after rotation separates two gears.Pendulum mass can be in perpendicular equilbrium position be near the position of swing rod level
Simple harmonic motion is done, with the rotation of swing rod, the rotary inertia of instrument alternately reduces increase therewith, and the horizontal rotating speed of rotating part is abided by
Following angular momentum conservation law, alternately increase reduces, and the embroidery water droplet figure in rotation dish also shows different phenomenons simultaneously.
One swing rod need to be only screwed on upper lift ring using another demonstration scheme of manually driven, made being taken out outside power transmission shaft
Bevel gear separates, and holds counterweight and is raised up to certain altitude, is loosed one's grip after applying a up time power with horizontal component.Counterweight
It will be fallen by gravity, reduce with the rotary inertia of weight fell instrument, it then follows the horizontal rotating speed of angular momentum conservation law will
Increase, the centripetal force needed for maintaining counterweight horizontal direction circular motion increases therewith, weight fell to maintenance circle during a certain position
Centripetal force needed for Zhou Yundong is more than the component of gravity in the horizontal direction, and hereafter the acceleration of weight fell can reduce.If pendulum mass from
Initial position is more than period increased kinetic energy and loss to the gravitional force that minimum point reduces, then pendulum mass can be moved by minimum point
Gravitional force can be again converted to, is so come and gone until balance, i.e., pendulum mass is no longer moved in vertical direction, instrument is hindered due to friction
Power rotating speed is gradually decrease to stop motion.
When using driven by power, the mounting groove of swing rod positioner is aligned in Upper shaft sleeve, insertion outside shafting two and connects block
Between, swing rod is fixed on the corresponding a certain angle of location-plate with bolt, connection reducing motor in power transmission shaft outer end starts electricity
Machine pulls out power transmission shaft and closes motor, weight is changed after stopping operating after recording motor speed, rotation dish rotating speed after invariablenes turning speed
Code, same time of being done work under same power record experimental data is drawn the relation of energy and quality using the poor method of work, similarly controlled
Counterbalance mass processed is constant, changes swing rod angle and obtains the relation of energy and the radius of gyration, and by rotational energy and rotary inertia
Proportional relation obtains the influence factor quality of rotary inertia and the relation of the radius of gyration.
Compared to conventional Physical Experiment, this elder generation by teacher demonstrate the experiment probed into again by student more can training student from
Main consciousness of exploration and innovative thinking, while the phenomenon that instrument is shown in presentation process is also more novel.
Brief description of the drawings
Fig. 1 be comprising overall front view.
Fig. 2-1 is the front view and top view of instrument body, and Fig. 2-2 is the side view of instrument body.
Fig. 3 is swing rod positioner.
Fig. 4 is upper shafting view.
Fig. 5 is lower shafting exploded view.
Fig. 6 is drive shaft system front view.
Fig. 7 is persistence of vision figure.
In figure：001- swing rod 002- counterweight 003- fixed block 004- base 005- reducing motors
Connect block 105- mounting groove 106- pilot holes in 101- locating piece 102- location-plate 103- positioning holes 104-
Connect block 205- left support plate 206- right support plates outside 201- upper lift ring 202- ball bearing 203- Upper shaft sleeves 204-
Rotation dish under rotation dish 302- Lower shaft sleeves A 303- lower axle 304- key A 305- on axle 301- on 207- pads 208-
Shaft filler washer A under 306- Lower shaft sleeve B 307- lower bearing sleeve A 308- angular contact ball bearing A 309- key B 310-
Shaft filler washer B 313- angular contact ball bearings B 314- lower bearing sleeve B 315- bevel gears A under 311- base upper plates 312-
401- bevel gear B 402- sliding bearing sleeve 403- side shield 404- sliding bearing 405- power transmission shaft 406- keys D.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, using be threadedly coupled fixation between swing rod (001) one end and upper lift ring (201), counterweight (002) and
The swing rod other end is fixed using threaded connection.Swing rod positioner (Fig. 3) can be along mounting groove (105) jack shafting on instrument
Connect outside the two of (Fig. 4) between block (204), control swing rod angle to carry out quantitative analysis during for inquiry experiment.Upper axle (208) is installed
To supporting plate (205,206) upper rear set Upper gasket (207), tightened with nut.Supporting plate passes through two L of upper rotation dish (301)
Shape hole, is screwed in lower rotation dish (305) by fixed block (003).Be driven shaft end connection driving equipment handwheel or
Reducing motor (005), is respectively used to demonstrate and probes into driving in function.
As shown in Fig. 2-1, the instrument body for probing into device is removed not comprising driving equipment and data acquisition equipment, can be direct
Demo function is realized by applying transient force to counterweight (002).
As shown in figure 3, it is interior connect between block (104) and location-plate (102) fastened with four screws, locating piece (101) is located at two
Between location-plate, locating piece is first inserted in swing rod (001) by pilot hole (106) when using, then by mounting groove (105) alignment
Axle, is twisted after installing the positioning hole that the positioning hole (103) of locating piece (101) both sides is aligned on location-plate after swing rod detent mechanism
Enter the determination that bolt realizes swing rod angle.
As shown in figure 4, upper shafting ecto-entad is followed successively by nut, pad (207), supporting plate (205,207), outer even block
(204), Upper shaft sleeve (203), ball bearing (202), upper lift ring (201), erection sequence is first by two ball bearings (202) press-in
Axle (208) is inserted in after upper lift ring (201), then is inserted in two Upper shaft sleeves (203), left support plate (205) and right support plate is placed to
(207) in groove, fastened with pad (207) and nut, block (204) is connected outside inserting from top to bottom and is fastened with 4 screws.
As shown in figure 5, inserting lower rotation dish after being connected between Lower shaft sleeve A (302) and lower axle (303) with key A (304)
(305) upper rotation dish (301), is placed on lower axle upper end, Lower shaft sleeve B (306) is inserted in from lower axle lower end, is clenched with four clamp screws
Gu rotation dish and lower axle, constitute the rotating part of one.Lower shaft filler washer A is laid successively in the top of base upper plate (311)
(310), angular contact ball bearing (308), lower bearing sleeve A (307), shaft filler washer B (312), angular contact ball under being laid successively under it
Bearing (313), lower bearing sleeve B (314), with four groups of bolt and nuts by this six fastening parts in base upper plate (311).By before
State rotating part integrally to insert in bearing hole, bevel gear A (315) is fixed to lower axle (303) with key and screw.
As shown in fig. 6, being connected and being fastened with screw with flat key between power transmission shaft (405) and bevel gear B (401).Sliding axle
(404) are held through sliding bearing sleeve (402) in side shield (403) rear enclosure, are fastened with 4 pairs of bolt and nuts.Power transmission shaft (405) is passed through
Sliding bearing (404), can free movement in the horizontal direction, realize bevel gear B (401) and bevel gear A (315) engage with point
From.The outer end of power transmission shaft (405) is provided with keyway, with key D (406) connection reducing motors (005) and handwheel.
As shown in fig. 7, the persistence of vision figure fallen from water droplet, using black silk and the line of blueness, with the hand of Suzhou embroidery
Legal system makes rotation dish on embroidery water droplet map combining, so that the size of horizontal rotating speed can pass through another novelty during instrument rotation
Form be observed.
Claims (6)
1. a kind of rotary inertia exploring instrument, at least including upper shafting, support, pendulum mass, lower shafting and base, may also include driver
Structure, swing rod positioner, data acquisition equipment and driving equipment；It is characterized in that：The pendulum mass being made up of counterweight and swing rod can be around upper
Axle can be rotated in vertical rotation in surface, the rotating part being made up of upper axle, support, pendulum mass and rotation dish centered on lower axle, together
When there is demonstration and function is probed into.
2. according to the rotary inertia exploring instrument described in claim 1, it is characterized in that：Four are uniform-distribution with the upper lift ring circumference
Individual screwed hole, can install one, a pair or two pairs pendulum mass.
3. according to the rotary inertia exploring instrument described in claim 1, it is characterized in that：The swing rod positioner can be inserted into upper shafting
And quantify angle of the control swing rod in vertical plane.
4. according to the rotary inertia exploring instrument described in claim 1, it is characterized in that：The lower axle portion of fastening is provided with rotation dish,
Fixed by support, the rotating part that constitutes of upper shafting and pendulum mass thereon, rotation dish upper surface is covered with persistence of vision image.
5. according to the rotary inertia exploring instrument described in claim 1, it is characterized in that：The transmission mechanism is located in base, and it is passed
Moving axis can be moved in the horizontal direction along linear bearing, and power transmission shaft outer end can connect handwheel or reducing motor.
6. according to the rotary inertia exploring instrument described in claim 1, it is characterized in that：Not comprising driving equipment, swing rod positioner
Directly demo function can be realized with the instrument body of data acquisition equipment by applying transient force to counterweight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225671.1A CN107085994A (en) | 2017-04-07 | 2017-04-07 | Rotary inertia exploring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225671.1A CN107085994A (en) | 2017-04-07 | 2017-04-07 | Rotary inertia exploring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107085994A true CN107085994A (en) | 2017-08-22 |
Family
ID=59611258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710225671.1A Pending CN107085994A (en) | 2017-04-07 | 2017-04-07 | Rotary inertia exploring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107085994A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645209A (en) * | 2009-09-03 | 2010-02-10 | 昆明理工大学 | Light angular momentum conservation demonstration instrument |
| CN104346977A (en) * | 2014-08-19 | 2015-02-11 | 浙江工业大学 | Rotary inertia teaching instrument |
| CN106327967A (en) * | 2016-10-21 | 2017-01-11 | 无锡职业技术学院 | Presentation device for angular momentum conservation |
-
2017
- 2017-04-07 CN CN201710225671.1A patent/CN107085994A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645209A (en) * | 2009-09-03 | 2010-02-10 | 昆明理工大学 | Light angular momentum conservation demonstration instrument |
| CN104346977A (en) * | 2014-08-19 | 2015-02-11 | 浙江工业大学 | Rotary inertia teaching instrument |
| CN106327967A (en) * | 2016-10-21 | 2017-01-11 | 无锡职业技术学院 | Presentation device for angular momentum conservation |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170822 |