CN202974564U - Device for measuring rotary moment of rotator - Google Patents
Device for measuring rotary moment of rotator Download PDFInfo
- Publication number
- CN202974564U CN202974564U CN 201220552417 CN201220552417U CN202974564U CN 202974564 U CN202974564 U CN 202974564U CN 201220552417 CN201220552417 CN 201220552417 CN 201220552417 U CN201220552417 U CN 201220552417U CN 202974564 U CN202974564 U CN 202974564U
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- pendulum
- rotary body
- rotator
- bearing
- annulus
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Abstract
A device for measuring rotary moment of a rotator comprises a supporting seat for supporting the rotator and a pendulum assembly. The two ends of the rotator to be measured are arranged on the supporting seat respectively through a bearing. The pendulum assembly is arranged on the central part of the rotator. The pendulum assembly comprises a swing rod and pendulums. The swing rod is of a flat dumbbell shape. The two ends of the swing rod are two symmetrical circular rings. The circular ring on the upper end is provided with three radial screwed holes along the circumferential direction. The screwed holes are used for fastening the rotator to be measured through screws. The two sides of the circular ring on the lower end are symmetrically provided with a pair of pendulums. Each pendulum is a disc having the same diameter as the circular rings and further provided with a boss in the center. The pendulums are connected through screws. The pendulums and the circular ring on the lower end of the swing rod form a complete cylindrical shape. The device with a very simple structure only has a few components. The device which is also very easy to install is especially suitably used for measuring the rotary moment of the rotator.
Description
Technical field
The utility model relates to a kind of device for measuring the rotary body moment of inertia.
Background technology
Rotary body is the heart of gyroscopic inclinometer.Detect instrument---the accelerometer of hole deviation, the fibre optic gyroscope in detecting instrument orientation all is placed on rotary body.The power resources of rotary body rotation are in motor, and the moment of inertia of rotary body is the foundation of selecting motor, are also simultaneously whether the selected motor of checking can meet the requirements of foundation.
The device of existing measurement moment of inertia is very complicated, and equipment cost is very high.A kind of measuring method and device of object rotation inertia are disclosed as CN200610011481.1, adopt field generator for magnetic to produce reset magnetic field and driving magnetic field, reset magnetic field resets the rotatable parts with magnetic functional material and measured object, and rotatable parts reset to reference position under the magnetic fields that reset magnetic field and magnetic functional material produce; Driving magnetic field makes rotatable parts begin to rotate, and along with angle between the magnetic moment of driving magnetic field and magnetic functional material reduces gradually, the torque of driving magnetic field generation also reduces gradually, under the effect of friction force, finally is still on the position with the reference position quadrature; Along with the rotation of rotatable parts, the angle between spiral arm and reset magnetic field will change, and the magnetic field intensity that magnetic functional material produces also changes thereupon; The GMR sensor detects the time dependent magnetic field intensity that magnetic functional material produces, and obtains the angle of measured object and angular velocity curve over time, thus the moment of inertia of judgement measured object.
But for some rotary body, needn't use complicated instrument, only measure moment of inertia by simple apparatus and method, can save great amount of cost.
The utility model content
it is a kind of simple in structure that the purpose of this utility model is to provide, maneuverable device for measuring the rotary body moment of inertia, comprise bearing and pendulum assembly for rotating body for supporting, wherein: the two ends of tested rotary body are arranged on described bearing by bearing respectively, described pendulum assembly comprises fork and pendulum, described fork is flat dumbbell shape, its two ends are two symmetrical annulus, wherein the annulus of upper end is along three threaded holes radially circumferentially are set, be used for by the tested rotary body of screw fastening, the annulus symmetria bilateralis of lower end is installed a pair of pendulum, described pendulum is diameter and middle disk with boss identical with described annulus, be connected by screw between pendulum, the annulus of pendulum and fork lower end is assembled into complete cylindrical shape.
During use, can measure by the pendulum method the total moment of inertia of pendulum assembly and rotary body.Be the shape of rule due to the pendulum assembly, can directly calculate its moment of inertia, therefore can have the moment of inertia that moment of inertia deducts the pendulum assembly, can obtain the moment of inertia of tested rotary body.
The utility model structure is very simple, and several parts are only arranged, and installs also to be very easy to, and is specially adapted to measure the moment of inertia of rotary body.
Figure of description
Fig. 1 is the schematic diagram of the utility model moment of inertia;
Fig. 2 is the schematic diagram of pendulum assembly in Fig. 1;
Fig. 3 is the schematic diagram of fork in Fig. 1.
Embodiment
Below describe the utility model and installation and using method in detail by a most preferred embodiment of the present utility model.
As shown in Figure 1, comprise bearing 2 and pendulum assembly 3 for the device of measuring the rotary body moment of inertia.The two ends of tested rotary body 1 are respectively by on bearing 4 erection supports 2.Wherein, bearing 2 is the support of V-arrangement, and bearing 4 preferably should be selected the less ball bearing of friction force.
As shown in Figure 2, pendulum assembly 3 comprises fork 31 and pendulum 32.Wherein, the shape of fork 31 as shown in Figure 3.In conjunction with Fig. 3, fork is flat dumbbell shape, and its two ends are two symmetrical annulus.Wherein, the annulus of fork 32 upper ends is used for tested rotary body being connected as a whole with fork by the fixing tested rotary body of screw 6 along circumferentially being provided with three threaded holes radially.The annulus symmetria bilateralis of fork 31 lower ends is installed a pair of pendulum 32.Pendulum 32 is diameter and middle disk with boss identical with described annulus, connects by screw 5 between pendulum 32, and the annulus of pendulum 32 and fork 31 lower ends is assembled into complete cylindrical shape.Be the regular shape of a symmetry after whole pendulum assembly 3 installs, and pendulum assembly 3 is preferably by steel and makes, can directly calculate its moment of inertia by the moment of inertia formula.
During use, make rotary body make micro-swinging (θ≤5 °) together with the pendulum assembly.Measure pendulum period T (can allow number of oscillations more as far as possible, then be averaging duration of oscillation and be T) with stopwatch.Can be derived the relation of Jz (rotary body installs total moment of inertia therewith) and T by little pendulum equation:
Wherein, mg is the quality of pendulum assembly, and T is hunting period, and a is the turning radius of pendulum assembly, makes J
1Be the moment of inertia of rotary body, J
2Be the moment of inertia of pendulum assembly, the pendulum assembly is regular part, J
2Can calculate.Data can solve Jz by experiment, by formula J
1=J
z-J
2, can obtain the moment of inertia of rotary body, the moment of inertia of known rotary body can be selected suitable motor, for the design of whole rotary body is laid a good foundation.
Claims (4)
1. a device that is used for measuring the rotary body moment of inertia, is characterized in that, comprises bearing and pendulum assembly for rotating body for supporting, wherein:
The two ends of tested rotary body are arranged on described bearing by bearing respectively, and described pendulum assembly is arranged on the middle part of described rotary body;
Described pendulum assembly comprises fork and pendulum, described fork is flat dumbbell shape, its two ends are two symmetrical annulus, wherein the annulus of upper end is along three threaded holes radially circumferentially are set, be used for by the tested rotary body of screw fastening, the annulus symmetria bilateralis of lower end is installed a pair of pendulum, and described pendulum is diameter and middle disk with boss identical with described annulus, be connected by screw between pendulum, the annulus of pendulum and fork lower end is assembled into complete cylindrical shape.
2. device according to claim 1, is characterized in that, connects by ball bearing between described tested rotary body and bearing.
3. device according to claim 1, is characterized in that, described bearing is V-shaped rest.
4. device according to claim 1, is characterized in that, described pendulum is always made by steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220552417 CN202974564U (en) | 2012-10-26 | 2012-10-26 | Device for measuring rotary moment of rotator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220552417 CN202974564U (en) | 2012-10-26 | 2012-10-26 | Device for measuring rotary moment of rotator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202974564U true CN202974564U (en) | 2013-06-05 |
Family
ID=48515622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220552417 Expired - Lifetime CN202974564U (en) | 2012-10-26 | 2012-10-26 | Device for measuring rotary moment of rotator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202974564U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822645A (en) * | 2014-03-03 | 2014-05-28 | 上海电力学院 | Validating and correcting method for angle fusion algorithm |
| CN104123865A (en) * | 2014-07-02 | 2014-10-29 | 齐齐哈尔大学 | Rotational inertia measuring and demonstrative experiment device |
| CN113358280A (en) * | 2021-06-02 | 2021-09-07 | 上海交通大学 | High-precision rotational inertia measuring device |
-
2012
- 2012-10-26 CN CN 201220552417 patent/CN202974564U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822645A (en) * | 2014-03-03 | 2014-05-28 | 上海电力学院 | Validating and correcting method for angle fusion algorithm |
| CN103822645B (en) * | 2014-03-03 | 2016-08-17 | 上海电力学院 | A kind of angle fusion proof of algorithm bearing calibration |
| CN104123865A (en) * | 2014-07-02 | 2014-10-29 | 齐齐哈尔大学 | Rotational inertia measuring and demonstrative experiment device |
| CN113358280A (en) * | 2021-06-02 | 2021-09-07 | 上海交通大学 | High-precision rotational inertia measuring device |
| CN113358280B (en) * | 2021-06-02 | 2024-01-16 | 上海交通大学 | High-precision rotational inertia measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
|
| CX01 | Expiry of patent term |