CN205613669U - Small -size inertial -type vibration exciter - Google Patents
Small -size inertial -type vibration exciter Download PDFInfo
- Publication number
- CN205613669U CN205613669U CN201620395833.7U CN201620395833U CN205613669U CN 205613669 U CN205613669 U CN 205613669U CN 201620395833 U CN201620395833 U CN 201620395833U CN 205613669 U CN205613669 U CN 205613669U
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- chassis
- small
- transmission shaft
- power
- motor
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Abstract
The utility model discloses a small -size inertial -type vibration exciter, direct current motor (1) through on being fixed in the chassis, reducing gear vice (4) of installing on motor output shaft give the power transmission with arranging transmission shaft (2) on the chassis in, transmission shaft (2) through the support with on arranging the chassis in, its both ends symmetry is provided with two excitation mechanisms, excitation mechanism by stand on that pivot (3) and cover on the chassis is put in the pivot and thereupon synchronous pivoted eccentric rotor (6) constitute, pivot (3) are perpendicular on same horizontal plane with transmission shaft (2), realize the transmission of power diversion through T -shaped shaft bevel gear (5) between transmission shaft (2) and pivot (3). The utility model discloses the structure is simple and easy, when producing the exciting force that laboratories such as mode measurements, dynamic performance assay needed, utilizes PWM speed regulator knob rotational speed to realize the continuous rotary speed control to the motor, has the control convenience, the volume is small and connect the new characteristic on the experimental object of difference more easily, has higher flexibility.
Description
Technical field
The utility model relates to vibrator technical field and dynamic experiment field, specifically, dynamics
Model analysis relates to as driving source, or vibrator equipment or the device of control power are provided.
Background technology
Vibrator is attached on some machinery and equipment in order to produce the device of exciting force.For structural excitation
Mode experiment substantially can be divided into contact and contactless.Conventional contact vibrator have mechanical type,
Electromagnetic type and electric-liquid type.The usual volume of this kind of vibrator is relatively big, and compared with model, its quality can not be neglected
Slightly.Generally place when testing and be fixed on ground or testing stand, by a rigid connecting rod
The exciting force of periodic transformation is delivered to testee so that it is forced vibration occurs, passes through signal picker
Obtain displacement time transformation relation at tested system point, thus carry out computational analysis.Said structure uses
Connecting rod makes to form additional stiffness and the additional support limiting vibration displacement amplitude, Yi Yin on by geodesic structure
Play error during data acquisition so that result of calculation is difficult to meet the required precision of mould measurement, impact test
Result.
Current mould measurement experiment is according to vibrator as driving source, and its big pogoniasis is connected with exciting object,
Thus form additional stiffness and additional support to by geodesic structure, cause test gained mode ginseng in some cases
Number error is bigger, it is difficult to meet the required precision of mould measurement.
Utility model content
The purpose of this utility model is the deficiency overcoming existing laboratory vibrator, provide one can with frequency modulation,
To not produced annex rigidity and annex damping, convenient arrange, the less and frequency that is applicable to rigidity by geodesic structure
The small-sized inertial exciter of rate relatively low works mould measurement.
The technical solution adopted in the utility model is as follows: a kind of small-sized inertial exciter, by power system and
Machanical vibratory extracting-driving system forms.Direct current generator 1 is by being fixed on chassis, and be arranged on motor output shaft subtracts
Power is sent to the power transmission shaft 2 being placed on chassis by speed gear pair tooth 8, and power transmission shaft 2 is placed in by support is same
On chassis, its two ends are symmetrically arranged with two exciting agencies；Exciting agency is by rotating shaft 3 He stood on chassis
Being nested with in rotating shaft and the eccentric massblock 6 of synchronous axial system therewith being constituted, rotating shaft 3 is vertical with power transmission shaft 2 simultaneously
It is in same level.Realize that direction-variable power transmits by bevel gear pair 5 between power transmission shaft 2 and rotating shaft 3.
Further, it is provided with the PWM direct current for controlling motor speed between direct current generator and motor power
Machine arrangements for speed regulation.
Further, the eccentric rotor of two exciting agencies is arranged on same vertical plane.
Further, rotating shaft 3 is provided with for indicating that current rotor actual speed tests the speed code-disc.
So, operationally, control system control direct current generator, utilize gear and drive link drive two can
The eccentric massblock of quenched amount reversely rotates, and obtains the one of the natural frequency of vibration identical with the subjects directly contacting
The big reverse exciting force of equity, thus carry out modal test.
In a kind of detailed description of the invention, eccentric mass rotor can embed additional mass, increases exciting force
Relative size, making exciting effect reach optimum makes actuator have more universality.
Device volume provided by the utility model is little, light weight, is placed on effective object to model mode
Parameter impact is negligible.Use the utility model, produce the examination such as mode measurement, dynamic Property Analysis
While testing required exciting force, PWM speed regulator knob rotating speed is utilized to realize the control of the continuous rotating speed to motor,
Have easy to control, volume is small and is easier to the new features being connected in different subjects, have more
High flexibility.
Brief description
Fig. 1 is the front view of excitation system.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is control system theory diagram.
Fig. 5 is the outside drawing of quality adjustable rotor.
Fig. 6 is the sectional view of Fig. 5.
In figure: 1. motor, 2. power transmission shaft, 3. rotating shaft, 4. speed reducing gear pair, 5. bevel gear pair, 6. eccentric
Rotor, 7. bearing, 8, connection holes, 9. bearing.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings, embodiment party of the present utility model
Formula includes but is not limited to the following example.
By Fig. 1-3 it can be seen that, in excitation system, direct current generator 1 is fixed on chassis by two fixed supports 7
On, speed reducing gear pair is arranged between machine shaft and power transmission shaft 2, to coordinate the maximum output of change motor to turn
Speed.Power transmission shaft 2 is fixed by two supports being fixedly arranged on chassis 9.Respectively install one at power transmission shaft 2 two ends
Bevel gear pair 5, changes transmission direction with two rotating shafts 3, the big reverse exciting force of transmission one equity.Eccentric rotor
6 are arranged in rotating shaft 3, and two rotating shafts are in same level, are supported by four supports 9.
When system quiescence, two eccentric rotor 6 centers of gravity should be located at same by regulating bevel gear pair 5
Horizontal line, both initial phases of control are identical.
By Fig. 4 it can be seen that, in control system, PWM DC motor drive is connected on direct current generator and motor electricity
Between source, control motor speed.
Can install the code-disc that tests the speed in rotating shaft 3, code-disc output signal is connected on revolution counter and measures actual turn of current rotor
Speed, can realize the frequency sweep work in modal test with accurate quick.Improve as one, eccentric rotor sets
Being equipped with the connection holes 8 of configuration different quality block, rotor can be inserted into different quality block to change exciting force size, from
And adapt to the model of the different natural frequency of vibration.
During specific experiment, vibrator will be assembled, be placed in tested model (such as simply supported beam model bridge floor) central authorities,
Being connected by electric wire with power-supply system with arrangements for speed regulation, being calculated the single order natural frequency of vibration through theory, regulation turns
Rotor speed circular frequency reaches to carry out modal test near the theoretical natural frequency of vibration, can conveniently obtain testing single order self-vibration
Frequency and other modal parameters.
The small-sized vibrator providing the utility model above is described in detail, and applies specific case pair
Principle of the present utility model and embodiment are illustrated, and the explanation of above example is only intended to help to understand
Core concept of the present utility model.It should be pointed out that, for those skilled in the art,
On the premise of without departing from the utility model principle, some improvement and modification can also be carried out to the utility model,
These improve and modification also falls in the utility model scope of the claims.
Claims (5)
1. a small-sized inertial exciter, is made up of power system and machanical vibratory extracting-driving system,
It is characterized in that, direct current generator (1), by being fixed on chassis, is arranged on motor output shaft
On speed reducing gear pair (4) power is sent to the power transmission shaft (2) that is placed on chassis, pass
Moving axis (2) is by support with being placed on chassis, and its two ends are symmetrically arranged with two exciting agencies；
Exciting agency is by the rotating shaft (3) stood on chassis and is nested with in rotating shaft and synchronous axial system therewith
Eccentric rotor (6) constitute, rotating shaft (3) is vertical with power transmission shaft (2) and is in same water
In plane；Realize that power becomes by bevel gear pair (5) between power transmission shaft (2) and rotating shaft (3)
To transmission.
2. small-sized inertial exciter according to claim 1, it is characterised in that straight
It is provided with the PWM direct current generator for controlling motor speed between stream motor (1) and motor power
Arrangements for speed regulation.
3. small-sized inertial exciter according to claim 1, it is characterised in that two
The eccentric rotor of individual exciting agency is arranged on same vertical plane.
4. small-sized inertial exciter according to claim 1 and 2, it is characterised in that
It is provided with in rotating shaft (3) for indicating that current rotor actual speed tests the speed code-disc.
5. small-sized inertial exciter according to claim 1, it is characterised in that partially
It is provided with the connection holes of configuration different quality block on heart rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620395833.7U CN205613669U (en) | 2016-05-04 | 2016-05-04 | Small -size inertial -type vibration exciter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620395833.7U CN205613669U (en) | 2016-05-04 | 2016-05-04 | Small -size inertial -type vibration exciter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205613669U true CN205613669U (en) | 2016-10-05 |
Family
ID=57026601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620395833.7U Expired - Fee Related CN205613669U (en) | 2016-05-04 | 2016-05-04 | Small -size inertial -type vibration exciter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205613669U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772381A (en) * | 2016-05-04 | 2016-07-20 | 西南交通大学 | Small inertia type vibration exciter |
| CN106978933A (en) * | 2017-02-27 | 2017-07-25 | 大连理工大学 | A kind of active mass damping unit based on rotation excitation actuator |
| CN108802807A (en) * | 2018-06-12 | 2018-11-13 | 西南石油大学 | A kind of adjustable small controllable earthquake focus exciting device of exciting force bandwidth |
| CN111458241A (en) * | 2020-03-11 | 2020-07-28 | 天津大学 | Servo coaxial dual-drive inertia vibration exciter |
-
2016
- 2016-05-04 CN CN201620395833.7U patent/CN205613669U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105772381A (en) * | 2016-05-04 | 2016-07-20 | 西南交通大学 | Small inertia type vibration exciter |
| CN106978933A (en) * | 2017-02-27 | 2017-07-25 | 大连理工大学 | A kind of active mass damping unit based on rotation excitation actuator |
| CN108802807A (en) * | 2018-06-12 | 2018-11-13 | 西南石油大学 | A kind of adjustable small controllable earthquake focus exciting device of exciting force bandwidth |
| CN111458241A (en) * | 2020-03-11 | 2020-07-28 | 天津大学 | Servo coaxial dual-drive inertia vibration exciter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20161005 Termination date: 20190504 |