CN206945218U - A kind of quick rotation inertia measuring instrument - Google Patents
A kind of quick rotation inertia measuring instrument Download PDFInfo
- Publication number
- CN206945218U CN206945218U CN201720459117.5U CN201720459117U CN206945218U CN 206945218 U CN206945218 U CN 206945218U CN 201720459117 U CN201720459117 U CN 201720459117U CN 206945218 U CN206945218 U CN 206945218U
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- motor
- upright post
- swinging mounting
- measurement
- measuring instrument
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Abstract
The utility model discloses a kind of quick rotation inertia measuring instrument, quick rotation inertia measuring instrument includes base, metal upright post, pallet, swinging mounting, Measuring plate, autorotation disk, measurement motor and spinning motor；Base upper surface center vertical is fixed with metal upright post upwards, and fixed cover is connected to pallet in the middle part of metal upright post, and tray upper surface is smooth；Pallet upper end pivot bush unit has the circular arc swinging mounting being bent upwards, and swinging mounting both ends are respectively equipped with measurement motor and spinning motor；Measurement motor upper end spiral is connected to Measuring plate, and spinning motor upper end spiral is connected to autorotation disk；The speed of the utility model rotation inerttia, operation and calculating are all relatively simple, and the training that experimenter need not be complicated can be completed to test.
Description
Technical field
It the utility model is related to experimental provision, and in particular to a kind of quick rotation inertia measuring instrument.
Background technology
Rotary inertia is that rotator inertia size is measured when rigid body is rotated about axis, and can directly reflect Rigid Body in Rotation With state
The complexity of change.The factors such as the concrete numerical value of rotary inertia and the shape of rigid body, Mass Distribution and rotating shaft position are relevant.It is several
All influences that all must take into consideration rotary inertia with rotating relevant precision instrument at work.For example in military field, it is
Weapon is maintained to launch the ballistic stability of bullet, it is necessary to bullet is rotated about the axis in flight course, and turn now
Dynamic inertia can regard measuring for the ability that bullet keeps rotating as, it is therefore necessary to be taken in when designing bullet.In machinery
Design field, sufficiently to utilize or suppressing to influence caused by the rotation of the parts such as gear, bearing, rotating disk, it is also necessary to fully examine
Consider rotary inertia factor.And whether the product manufactured has reached the requirement of design and use, it is necessary to which its rotary inertia is carried out
More accurate quick measurement.
Currently used method for measuring rotary inertia mainly has three-line pendulum method, torsional oscillation method, swing method etc., and these methods are main
It it is torsion by measuring rigid body or hunting period indirectly to obtain rotary inertia.But when actually measuring, these measurement sides
Method often has the defects of larger.By taking the most frequently used three-line pendulum method as an example, its measurement result not only has with local gravitational acceleration g
Close, and experiment have ignored the influence of the translation of lower disc, takeThe methods of approximate, this all brings to measurement
Inevitable error.In addition, need to measure the numerical value of up to seven physical quantitys, the calculating requirement of rotation period in experimentation
The average value of at least 50 rotation periods.So measuring the rotary inertia of sample using the above method, not only precision is not high, and
Speed is excessively slow.So a kind of measurement accuracy of utility model is higher, and the faster instrument of measuring speed is very important.
Utility model content
For the shortcomings that above-mentioned existing rotation inerttia apparatus measures speed is slow, calculating process is complicated, the utility model
On the premise of necessary measurement accuracy is ensured, there is provided a kind of measuring speed is fast, the simple rotation inerttia instrument of calculating process
And its measuring method.
The utility model adopts the technical scheme that：A kind of quick rotation inertia measuring instrument, including base, metal upright post,
Pallet, swinging mounting, Measuring plate, autorotation disk, measurement motor and spinning motor；Fixation is set base upper surface center vertical upwards
There is metal upright post, metal upright post middle part fixed cover is connected to pallet, and tray upper surface is smooth；Pallet upper end pivot bush unit is bent up
Bent circular arc swinging mounting, swinging mounting both ends are respectively equipped with measurement motor and spinning motor；Measurement motor upper end passes through it
Rotating shaft is connected to Measuring plate, and spinning motor upper end is connected to autorotation disk by its rotating shaft；
As a kind of perferred technical scheme：Described measurement motor is rotating speed adjustable motor, and spinning motor is constant speed electricity
Machine, and measurement motor and spinning motor reversely rotate each other, are slow speed motor；
As a kind of perferred technical scheme：The Circularhole diameter at described swinging mounting center is straight slightly larger than metal upright post
Footpath, and suitably use lubricant.
As a kind of perferred technical scheme：Described Measuring plate and the shape of autorotation disk, structure, quality and material are equal
It is identical.
As a kind of perferred technical scheme：Angle between described swinging mounting and metal upright post is 450-600。
The beneficial effects of the utility model are：（1）The speed of rotation inerttia, operation and calculating are all more simple
Single, the training that experimenter need not be complicated can be completed to test；（2）While measuring speed is ensured, also it can guarantee that preferably
Measurement accuracy.（3）Detection process is vivid, directly perceived, can not only be used as measuring instrument, can also be used as teaching demonstration instruments.
Brief description of the drawings
Fig. 1 is a kind of structure chart of quick rotation inertia measuring instrument；
In figure：1 base, 2 metal upright posts, 3 pallets, 4 swinging mountings, 5 Measuring plates, 6 autorotation disks, 7 measurement motors, 8 rotations
Motor.
Embodiment
The utility model is expanded on further by embodiment below in conjunction with the accompanying drawings；It should be understood that these embodiments are only used for
Bright the utility model, and unrestricted the scope of the utility model.
Refer to the attached drawing 1, a kind of quick rotation inertia measuring instrument, including base 1, metal upright post 2, pallet 3, swinging mounting 4,
Measuring plate 5, autorotation disk 6, measurement motor 7 and spinning motor 8；The upper surface center vertical of base 1 is fixed with metal and stood upwards
Post 2, the middle part fixed cover of metal upright post 2 are connected to pallet 3, and the upper surface of pallet 3 is smooth；The upper end pivot bush unit of pallet 3 is bent upwards
Circular arc swinging mounting 4, the both ends of swinging mounting 4 are respectively equipped with measurement motor 7 and spinning motor 8；The upper end of measurement motor 7 passes through
Its rotating shaft is connected to Measuring plate 5, and the upper end of spinning motor 8 is connected to autorotation disk 6 by its rotating shaft；
Described measurement motor 7 is rotating speed adjustable motor, and spinning motor 8 is constant-seed motor, and measurement motor 7 and rotation are electric
Machine 8 reversely rotates each other, and drives Measuring plate 5 and autorotation disk 6 to reversely rotate each other；Measurement motor 7 and spinning motor 8 are slow
Speed motor, model motor preferably of the same race is to ensure that quality, structure, shape and material are identical；
The Circularhole diameter at the described center of swinging mounting 4 is slightly larger than the diameter of metal upright post 2, and suitably uses lubricant,
Reduce the frictional force between pallet 3, swinging mounting 4 and metal upright post 2 as far as possible, that is, system rotates turning for suffered external force
Kinetic moment very little, the conservation of angular momentum i.e. initial time for being approximately considered whole device rotation is zero；Swinging mounting 4 is located at pallet 3
On and fixed-axis rotation can be done around metal upright post 2；
Described Measuring plate 5 and shape, structure, quality and the material of autorotation disk 6 are identical, to ensure the two
Rotary inertia is identical and then ensures to calculate simplicity；
Angle between described swinging mounting 4 and metal upright post 2 is 450-600。
1 pair of specific measuring method of the present utility model is described in detail, it is necessary to which what is illustrated is below in conjunction with the accompanying drawings
Measurement motor 7 and spinning motor 8 are using model motor of the same race, i.e. east 5IK40GK-S, the model in specific implementation content
Direction of motor rotation and rotating speed are arbitrarily adjustable.
Step 1：Fixed swinging mounting 4 manually, determinand is positioned in Measuring plate 5, opens measurement motor 7 and rotation
Motor 8 to Measuring plate 5 and the opposite direction of autorotation disk 6 rotates, and now releases the fixation of swinging mounting 4；
Step 2：Release swinging mounting 4 fixation after, if swinging mounting 4 start rotation and with the rotation direction one of Measuring plate 5
Cause, because the rotating speed of spinning motor 8 is fixed, then fix swinging mounting 4 manually again and turn down the rotating speed of measurement motor 7 and releasing turn
The fixation of dynamic support 4 tries again；If conversely, after releasing the fixation of swinging mounting 4, swinging mounting 4 start to rotate and with 5 turns of Measuring plate
It is dynamic in opposite direction, then retighten swinging mounting 4 and raise the rotating speed of measurement motor 7 and then release swinging mounting 4 and try again；With this
Analogize, constantly according to the rotating speed of releasing rotation direction regulation measurement motor 7 of swinging mounting 4 after fixed, after releasing is fixed
Untill swinging mounting 4 is not rotated further by, then experimental section is completed；
Step 3：Each object amount and the law of conservation of angular momentum are determined according to step 2：
Formula 1
Calculate the rotary inertia of object under test：
Formula 2
Carry out calculating the rotary inertia for having tried to achieve determinand；
In formula 1 and formula 2：n 1For measurement motor（7）The number of revolution per unit of time
n 2For spinning motor（8）The number of revolution per unit of time
J isMeasuring plate（5）With autorotation disk（6）Rotary inertia
J' be object under test rotary inertia.
It should be noted last that above example only explains the technical solution of the utility model rather than limit to supplement
System.Although the utility model is described in detail with reference to embodiment, this area vast is it will be appreciated by the skilled person that to this
The technical scheme of utility model is modified or replaced on an equal basis, without departure from the spirit and model of technical solutions of the utility model
Enclose, it all should cover among right of the present utility model.
Claims (5)
- A kind of 1. quick rotation inertia measuring instrument, it is characterised in that：Including base（1）, metal upright post（2）, pallet（3）, rotate Support（4）, Measuring plate（5）, autorotation disk（6）, measurement motor（7）And spinning motor（8）；Base（1）Upper surface center vertical It is fixed with metal upright post upwards（2）, metal upright post（2）Middle part fixed cover is connected to pallet（3）, pallet（3）Upper surface is smooth；Support Disk（3）Upper end pivot bush unit has the circular arc swinging mounting being bent upwards（4）, swinging mounting（4）Both ends are respectively equipped with measurement electricity Machine（7）And spinning motor（8）；Measurement motor（7）Upper end is connected to Measuring plate by its rotating shaft（5）, spinning motor（8）Upper end passes through Its rotating shaft is connected to autorotation disk（6）.
- A kind of 2. quick rotation inertia measuring instrument according to claim 1, it is characterised in that：Described measurement motor（7） For rotating speed adjustable motor, spinning motor（8）For constant-seed motor, and measurement motor（7）And spinning motor（8）Reversely rotate each other, And drive Measuring plate（5）And autorotation disk（6）Reversely rotate each other；Measurement motor（7）And spinning motor（8）It is slow speed motor.
- A kind of 3. quick rotation inertia measuring instrument according to claim 1, it is characterised in that：Described swinging mounting（4） The Circularhole diameter at center is slightly larger than metal upright post（2）Diameter, and be suitably used cooperatively lubricant.
- A kind of 4. quick rotation inertia measuring instrument according to claim 1, it is characterised in that：Described Measuring plate（5）With Autorotation disk（6）Shape, structure, quality and material it is identical.
- A kind of 5. quick rotation inertia measuring instrument according to claim 1, it is characterised in that：Described swinging mounting（4） With metal upright post（2）Between angle be 450-600。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720459117.5U CN206945218U (en) | 2017-04-28 | 2017-04-28 | A kind of quick rotation inertia measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720459117.5U CN206945218U (en) | 2017-04-28 | 2017-04-28 | A kind of quick rotation inertia measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206945218U true CN206945218U (en) | 2018-01-30 |
Family
ID=61359711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720459117.5U Expired - Fee Related CN206945218U (en) | 2017-04-28 | 2017-04-28 | A kind of quick rotation inertia measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206945218U (en) |
-
2017
- 2017-04-28 CN CN201720459117.5U patent/CN206945218U/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: 20180130 Termination date: 20210428 |