CN206575287U - A kind of torsional oscillation loading device excited by eccentric motor - Google Patents
A kind of torsional oscillation loading device excited by eccentric motor Download PDFInfo
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- CN206575287U CN206575287U CN201720088828.6U CN201720088828U CN206575287U CN 206575287 U CN206575287 U CN 206575287U CN 201720088828 U CN201720088828 U CN 201720088828U CN 206575287 U CN206575287 U CN 206575287U
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- eccentric motor
- exciting
- brush
- electricity polar
- polar ring
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Abstract
A kind of torsional oscillation loading device excited by eccentric motor, the center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, first eccentric motor and the second eccentric motor are separately fixed at the two ends of the exciting arm of force, positive electricity polar ring and negative electricity polar ring, which are arranged on, to be fixed on the outer tube wall of exciting tub, positive electricity polar ring and negative electricity polar ring are connected by wire with the first eccentric motor and the second eccentric motor respectively, positive brush and negative brush are all fixed on brush base, positive brush is contacted with positive electricity polar ring, negative brush is contacted with negative electricity polar ring, positive brush and negative brush are connected to power supply, rotating shaft one end is fixedly connected on the circle centre position of exciting tub bottom surface.Rotating shaft is driven by power source to rotate, exciting tub is rotated together with rotating shaft, the periodicity tangential force that eccentric motor is produced causes cyclic torque in circle centre position, so that rotating shaft is by torsional excitation, realize that countershaft applies the function of torsional excitation, it is simple and compact for structure, implement more to facilitate, performance is relatively reliable.
Description
Technical field
The utility model is related to mechanical field, particularly a kind of torsional oscillation loading device excited by eccentric motor.
Background technology
Eccentric motor is hit, and ability is strong, and torsion can all be used by being widely used in various exciting occasions, engineering many occasions
Shake excitation mode countershaft part carry out torsional oscillation loading, such as engine crankshaft, steam turbine generator and marine shafting rotating part
Fatigue test, the twisting vibration experiment of part, carry out model analysis, Response Analysis, to understand the performance of these shafting componentses,
Its dynamic performance under some operating modes is simulated, correlation test data are obtained.The dynamic stress produced using torsion coupling resonance
To eliminate the residual stress of rotating shaft part, need countershaft to apply torsional excitation in implementation process, work as motor rotation frequency
Equal to natural bending frequency and torsional natural frequency difference when, the torsional excitation of application is equal to torsional natural frequency, by bending coupling
Reasonable opinion, eccentrically weighted shaft can excite flexural resonance simultaneously, and flexural resonance is mutually strengthened with torsional resonance, produce enough moving and answer
Power.The torsional activator used at present has electromagnetic exciter, Pneumatic vibration exciter, a hydraulic vibration exciter, but these exciter structures
Complexity, reliability is not high, expensive, and maintenance cost is high, performance difficulty, it is difficult to which popularization is used.
Utility model content
The purpose of this utility model is to provide a kind of torsional oscillation loading device excited by eccentric motor, by rotary shaft with
Exciting frame is rigidly connected, and the vibration arm of force is connected with rigidity of frame, and two eccentric motors are connected firmly with exciting arm of force end respectively, respectively
Centered on the arm of force center of circle, both sides are symmetrically installed.Rotating shaft is driven by power source to rotate, the exciting arm of force and frame due to rotary shaft
It is rigidly connected, is rotated together with rotating shaft.The periodicity tangential force that eccentric motor is produced causes cyclic torque in circle centre position so that
Rotating shaft is by torsional excitation.
The utility model reaches above-mentioned purpose by the following technical programs：
A kind of torsional oscillation loading device excited by eccentric motor, including rotating shaft, exciting tub, the exciting arm of force, positive electricity polar ring,
Negative electricity polar ring, the first eccentric motor, the second eccentric motor, positive brush, negative brush and brush base；
The center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, the first eccentric motor and the second eccentric motor
The two ends of the exciting arm of force are separately fixed at,
Positive electricity polar ring and negative electricity polar ring, which are arranged on, to be fixed on the outer tube wall of exciting tub, positive electricity polar ring and negative electricity polar ring point
It is not connected by wire with the first eccentric motor and the second eccentric motor,
Positive brush and negative brush are all fixed on brush base, and positive brush is contacted with positive electricity polar ring, negative brush and negative electrode
Ring is contacted, and positive brush and negative brush are connected to power supply,
Rotating shaft one end is fixedly connected on the circle centre position of exciting tub bottom surface.
The exciting arm of force and be separately mounted to first eccentric motor and the second eccentric motor at exciting arm of force two ends with
The exciting arm of force is centrally formed Central Symmetry, and then countershaft produces moment of torsion.
The exciting arm of force is in addition to center and the junction of exciting tub, and remaining two end portions is in hanging shape
State.
It is of the present utility model to have the prominent advantages that：
Vibrator described in the design is made up of component of machine mostly, and reliability is high, simple and compact for structure, easy for installation
Simple and direct, parts intensity is high, is adapted to larger exciting scope, and the exciting arm of force is adjustable, eccentric motor arrangement, position
Put adjustable, compared to electromagnetism Torsional Vibration Motor, hydraulic pressure, pneumatic torsional excitation device, eccentric motor generation torsional oscillation mode, principle are simpler,
Implement more to facilitate, service behaviour is relatively reliable, reduces production investment cost, improve economic benefit, eccentric motor is produced
Exciting force size be adjusted by eccentric mass, eccentric distance and eccentric motor rotating speed, eccentric block is changed, regulation is easy, can
To be adjusted according to the actual conditions of experiment parts, flexibility is strong, wide adaptability, in nominal speed range, Ke Yishi
Existing stepless time adjustment, cost is low, and maintenance is easy, greatly expands the application of torsional activator.
Brief description of the drawings
Fig. 1 is the structural representation of the torsional excitation device described in the utility model excited by eccentric motor.
Fig. 2 is the front view of the torsional excitation device described in the utility model excited by eccentric motor.
Fig. 3 is the right view of the torsional excitation device described in the utility model excited by eccentric motor.
Fig. 4 is the enlarged diagram of location A in Fig. 3.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to the technical solution of the utility model.
A kind of torsional oscillation loading device excited by eccentric motor, including rotating shaft 1, exciting tub 2, the exciting arm of force 3, positive electrode
Ring 6, negative electricity polar ring 5, the first eccentric motor 4, the second eccentric motor 4, positive brush 8, negative brush and brush base 7；
The center of the exciting arm of force 3 is fixedly connected with the center of circle of the bottom surface of exciting tub 2, and the first eccentric motor 4 and second is eccentric
Motor 4 is separately fixed at the two ends of the exciting arm of force 3,
Positive electricity polar ring 6 and negative electricity polar ring 5, which are arranged on, to be fixed on the outer tube wall of exciting tub 2, positive electricity polar ring 6 and negative electrode
Ring 5 is connected by wire 9 with the first eccentric motor 4 and the second eccentric motor 4 respectively,
Positive brush 8 and negative brush are all fixed on brush base 7, and positive brush 8 is contacted with positive electricity polar ring 6, and negative brush is with bearing
Electrode retaining collar 5 is contacted, and positive brush 8 and negative brush are connected to power supply,
The one end of rotating shaft 1 is fixedly connected on the circle centre position of the bottom surface of exciting tub 2.
Further, the exciting arm of force 3 and it is separately mounted to first eccentric motor 4 and at the two ends of the exciting arm of force 3
Two eccentric motors 4 are with the Central Symmetry that is centrally formed of the exciting arm of force 3, and then countershaft 1 produces moment of torsion.
Further, the exciting arm of force 3 is in addition to center and the junction of exciting tub 2, remaining two end portions
In vacant state.
During work, rotating shaft 1 is driven by power source to rotate, and motor drives rotating shaft 1 to rotate, and rotating shaft 1 drives the rotation of torsional excitation device
Turn, the first eccentric motor 4, the power line of the second eccentric motor 4 pass through hole and positive electricity polar ring 6 in exciting tub 2 by wire 9
It is connected with negative electricity polar ring 5, when rotating shaft 1 rotates, positive electricity polar ring 6 and negative electricity polar ring 5 are remained and connect with positive brush 8 and negative brush
Touch, so as to provide power supply and signal to the first eccentric motor 4, the second eccentric motor 4.First eccentric motor 4 and the second eccentric electricity
Vibration is produced after the connection power initiation of machine 4 so that the exciting arm of force 3 vibrates, and then countershaft 1 produces moment of torsion.The exciting
Frame is cylinder barrel shaped, and positive electricity polar ring 6 and negative electricity polar ring 15 are coaxially mounted on the cylindrical outer wall face of cylinder barrel shaped exciting frame,
One end of cylinder barrel shaped exciting frame is designed with bottom surface provided with bottom surface or two ends.
The twisting vibration exported by torsional excitation device is applied in the rotating shaft 1 of the rotation of high rigidity, whenThe rotary frequency of rotating shaft 1 RateIt is equal toNatural bending frequencyWithTorsional natural frequencyDifference when, theoretical by torsion coupling resonance, a frequency, which is equal to, reverses solid
The torsional excitation for having frequency can be while have excited flexural resonance, and flexural resonance is mutually strengthened with torsional resonance, produces enough
Dynamic stress eliminates the residual stress of high rigidity rotating shaft 1.
Claims (3)
1. a kind of torsional oscillation loading device excited by eccentric motor, it is characterised in that including rotating shaft, exciting tub, the exciting arm of force,
Positive electricity polar ring, negative electricity polar ring, the first eccentric motor, the second eccentric motor, positive brush, negative brush and brush base；
The center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, the first eccentric motor and the second eccentric motor difference
The two ends of the exciting arm of force are fixed on,
Positive electricity polar ring and negative electricity polar ring, which are arranged on, to be fixed on the outer tube wall of exciting tub, and positive electricity polar ring and negative electricity polar ring lead to respectively
Wire is crossed to be connected with the first eccentric motor and the second eccentric motor,
Positive brush and negative brush are all fixed on brush base, and positive brush is contacted with positive electricity polar ring, and negative brush connects with negative electricity polar ring
Touch, positive brush and negative brush are connected to power supply,
Rotating shaft one end is fixedly connected on the circle centre position of exciting tub bottom surface.
2. the torsional oscillation loading device excited by eccentric motor as claimed in claim 1, it is characterised in that the exciting arm of force with
And be separately mounted to first eccentric motor and the second eccentric motor at the exciting arm of force two ends center is centrally formed with the exciting arm of force
Symmetrically, so countershaft produce moment of torsion.
3. the torsional oscillation loading device as claimed in claim 1 excited by eccentric motor, it is characterised in that the exciting arm of force is removed
Center with outside the junction of exciting tub, remaining two end portions is in vacant state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088828.6U CN206575287U (en) | 2017-01-20 | 2017-01-20 | A kind of torsional oscillation loading device excited by eccentric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088828.6U CN206575287U (en) | 2017-01-20 | 2017-01-20 | A kind of torsional oscillation loading device excited by eccentric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206575287U true CN206575287U (en) | 2017-10-20 |
Family
ID=60061368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720088828.6U Expired - Fee Related CN206575287U (en) | 2017-01-20 | 2017-01-20 | A kind of torsional oscillation loading device excited by eccentric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206575287U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877562A (en) * | 2017-01-20 | 2017-06-20 | 广西大学 | A kind of torsional oscillation loading device excited by eccentric motor |
-
2017
- 2017-01-20 CN CN201720088828.6U patent/CN206575287U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877562A (en) * | 2017-01-20 | 2017-06-20 | 广西大学 | A kind of torsional oscillation loading device excited by eccentric motor |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20180120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |