CN116066511A - Adjustable multistage synchronous active vibration damper and vibration damping method - Google Patents
Adjustable multistage synchronous active vibration damper and vibration damping method Download PDFInfo
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- CN116066511A CN116066511A CN202310222753.6A CN202310222753A CN116066511A CN 116066511 A CN116066511 A CN 116066511A CN 202310222753 A CN202310222753 A CN 202310222753A CN 116066511 A CN116066511 A CN 116066511A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/002—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion characterised by the control method or circuitry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/005—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion using electro- or magnetostrictive actuation means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
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Abstract
The invention discloses an adjustable multistage synchronous active vibration damper and a vibration damping method, and relates to the technical field of vibration damping. The active vibration damper comprises a bottom plate, a supporting plate, an electric control driving device, a power switch, a wire and an active vibration damper; the active vibration damper comprises a direct-current speed reduction motor, a motor mounting seat, a dowel bar mechanism, a linear ball guide cylinder, a contact block and other parts; the electric control driving device provides a power source for the active vibration damper and controls the start and stop of the direct current speed reduction motor, and the electric control driving device respectively and independently controls and adjusts each active vibration damper to generate active vibration damping waveforms with different characteristics. The vibration damping method enables the phase of the vibration waveform generated by the active vibration damper to be opposite to the phase of the vibration waveform generated by the vibration damping object, the vibration waveform generated by the active vibration damper is matched with the frequency and the amplitude of the vibration waveform generated by the vibration damping object, and the vibration waveform generated by the vibration damping object and the vibration waveform generated by the active vibration damper are mutually counteracted after being overlapped, so that the purpose of active vibration damping is achieved.
Description
Technical Field
The invention relates to the technical field of vibration reduction, in particular to an adjustable multistage synchronous active vibration reduction device and a vibration reduction method.
Background
With the advancement of industrial civilization, the application of vibration damping technology is becoming more and more widespread. Currently, the technique of damping vibration of a vibration damping object is mainly divided into the following two types.
First, passive vibration damping technique:
the passive vibration damping technology mainly comprises three methods of vibration isolation, dynamic vibration absorption and vibration damping. The vibration isolation technology is realized by adding an elastic element and a damping element between an excitation source and a vibration reduction object, but only can isolate vibration of a single frequency, and is difficult to realize for low-frequency vibration isolation. The dynamic vibration absorbing technology is to add a mass-spring-damping system on a vibration absorbing object, but the deformation of the spring is relatively fixed, the damping coefficient cannot be changed, and meanwhile, the problem of resonance with the vibration absorbing object exists, so that the dynamic vibration absorbing technology is only suitable for simple harmonic external disturbance with unchanged frequency or small frequency change, and the weight and the amplitude of a mass block are limited. The vibration damping technology is to spray or bond some damping layers on the surface of the vibration damping object to achieve the purpose of energy dissipation. However, this technique has a certain effect in the resonance case and has a very limited vibration damping effect in the non-resonance case.
Second, active damping technique:
active damping techniques are those that apply a counter-vibration to a damping object to counteract its vibration. In order to apply effective reverse vibration, it is first necessary to detect the vibration frequency of the vibration-damping object, then through a series of signal processing and arithmetic processing, finally, the actuator is driven to apply reverse vibration to the vibration-damping object according to the detected vibration frequency. The frequency adaptive active vibration damping device for a precision laboratory bench disclosed in patent CN209233746U, in which a signal processing unit uses an inverter to invert the phase of a received electric signal by 180 degrees, and simultaneously uses a transmitting piezoelectric ceramic plate to receive the electric signal output by the inverter and convert the electric signal into a vibration signal with the same frequency and opposite phase to the sound wave emitted by the precision laboratory bench, thereby realizing frequency adaptive active vibration damping. However, the device can only attenuate vibration of a single frequency at a moment, cannot synchronously damp vibration of a plurality of frequencies, and has limited damping effect.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an adjustable multistage synchronous active vibration damping device and a vibration damping method, which solve the problem of limited vibration damping effect in the existing vibration damping technology.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the adjustable multistage synchronous active vibration damper comprises a bottom plate, wherein an electric control driving device and a plurality of active vibration dampers which are mutually independent are arranged on the bottom plate, and the active vibration dampers are respectively and electrically connected with the electric control driving device through a plurality of wires;
each active vibration damper comprises a direct-current speed reduction motor fixedly arranged on a bottom plate, the direct-current speed reduction motor is electrically connected with an electric control driving device through a wire, a dowel bar mechanism is arranged at the output end of the direct-current speed reduction motor, the dowel bar mechanism is vertically arranged, a contact block is arranged at the top of the dowel bar mechanism, and the top of the contact block is used for contacting a vibration damping object;
the dowel bar mechanism is used for converting the rotary motion of the direct-current speed reduction motor into reciprocating linear motion in the vertical direction of the contact block;
the electric control driving device is used for synchronously starting and stopping a plurality of direct current speed reduction motors and controlling the rotating speed of the direct current speed reduction motors.
The basic principle of the adjustable multistage synchronous active vibration damper is as follows: the base plate is provided with a plurality of mutually independent active vibration dampers, the direct current speed reduction motors in the active vibration dampers can respectively and independently adjust the rotation direction and the rotation speed through the electric control driving device, the direct current speed reduction motors drive the contact blocks to reciprocate in the vertical direction through the dowel bar mechanism to generate active vibration damping waveforms with different characteristics, the frequency and the amplitude of the active vibration damping waveforms are matched with the frequency and the amplitude of vibration waveforms generated by a vibration damping object, so that the vibration waveforms generated by the vibration damping object and the active vibration damping waveforms generated by the active vibration dampers are mutually offset after being overlapped, the vibration of a plurality of different frequencies of the vibration damping object can be synchronously subjected to multistage active vibration damping, the vibration damping requirements of different vibration damping objects are met, and the problem that the vibration damping effect of the existing vibration damping technology is limited is solved.
Further, as a specific setting mode of the direct-current speed reduction motors, one side of each direct-current speed reduction motor is provided with an access end, and the access end is electrically connected with the electric control driving device through a wire;
the output end of each direct current speed reduction motor is fixedly connected with an output shaft, a C-shaped flat key is arranged on the output shaft, and the output shaft is connected with the dowel bar mechanism through the C-shaped flat key.
Further, as a specific fixing mode between the direct-current speed reduction motors and the bottom plate, each direct-current speed reduction motor is fixedly connected with the bottom plate through a motor mounting seat;
the motor mounting seat is of a cuboid structure, a cavity is formed in the motor mounting seat, the cavity penetrates through the front face and the back face of the motor mounting seat, a plurality of threaded holes are formed in the cavity, and the motor mounting seat is fixedly connected with the upper end face of the bottom plate through the plurality of threaded holes;
the side wall of the direct current speed reduction motor, which is close to the output end, is fixedly connected with the side wall of one side of the motor mounting seat, and the output shaft penetrates through the side walls of the two sides of the motor mounting seat to be fixedly connected with the dowel bar mechanism; a bearing is arranged between the output shaft and the side wall of the motor mounting seat, and a bearing end cover is arranged on the side wall of the motor mounting seat.
The motor mounting seat is arranged, so that the direct-current reduction motor is fixedly connected with the bottom plate, and the phenomenon that the direct-current reduction motor moves upwards due to the influence of inertia of the contact block in the process of driving the contact block to move through the dowel bar mechanism is avoided.
Further, as a concrete setting mode of the dowel bar mechanisms, each dowel bar mechanism comprises a dowel bar, the top end of the dowel bar is connected with a contact block, the bottom end of the dowel bar is connected with a swinging rod, the lower part of the swinging rod is rotationally connected with a connecting rod through a rotating shaft, the lower part of the other end of the connecting rod is provided with an eccentric vibrating wheel, a rocker rotationally connected with the connecting rod is convexly arranged on one side wall of the eccentric vibrating wheel, the other side wall of the eccentric vibrating wheel is provided with a shaft hole connected with an output shaft, and a key slot matched with a C-shaped flat key is arranged in the shaft hole. An output shaft of the direct current speed reducing motor is fixedly connected with a shaft hole of the eccentric vibrating wheel, the direct current speed reducing motor drives the eccentric vibrating wheel to rotate around the axis of the direct current speed reducing motor, the rocker is eccentrically arranged with the eccentric vibrating wheel, the rocker is rotationally connected with the connecting rod, the connecting rod is rotationally connected with the rocker at the bottom of the dowel bar, the eccentric rotation action of the rocker is converted into the vertical reciprocating linear motion of the dowel bar through the connecting rod, the rocker and the dowel bar, and then the contact block at the top of the dowel bar is driven to move up and down in the vertical linear direction, so that the active vibration damper generates active vibration damping waveforms for counteracting the vibration waveforms generated by a vibration damping object, and the purpose of active vibration damping is achieved.
Further, as a specific setting mode of the connecting rod, two ends of the connecting rod are symmetrically provided with a first connecting hole and a second connecting hole respectively, and the first connecting hole is rotationally connected with the swing rod through a rotating shaft; the second connecting hole is in rotary fit with the rocker; and the rotating shaft and the rocker are both provided with snap rings.
The clamping ring on the rotating shaft is used for axially limiting the swing rod; the snap ring on the rocker is used for axially limiting the connecting rod.
Further, as a specific setting mode of the eccentric vibrating wheels, each eccentric vibrating wheel comprises a vibrating wheel body with a cylindrical structure, a rocker is arranged on one side wall of the vibrating wheel body, the rocker is of a cylindrical structure, and the axis of the rocker is not coincident with the axis of the vibrating wheel body;
a boss with a cylindrical structure is convexly arranged on the side wall of the other side of the vibrating wheel body, and the axis of the boss is coincident with the axis of the vibrating wheel body; the boss is provided with a shaft hole.
Further, a supporting plate is vertically arranged on the bottom plate, an L-shaped mounting frame is formed after the supporting plate is fixedly connected with the bottom plate, the side walls of the supporting plate are fixedly provided with linear ball guide barrels the number of which is the same as that of the active vibration dampers, and the linear ball guide barrels are in one-to-one matching relation with the active vibration dampers; each dowel bar is arranged in the linear ball guide cylinder, so that the dowel bar and the support plate of the dowel bar mechanism are fixed, and the freedom degrees of the dowel bars in other directions except the vertical linear direction are limited.
Further, the rotation directions of the direct-current speed reduction motors in the two adjacent active vibration dampers are opposite. The electric control driving device controls the two adjacent direct current speed reduction motors to rotate in opposite directions so as to counteract the vibration of the two adjacent direct current speed reduction motors.
Further, as a specific setting mode of the electric control driving device, a power switch is arranged on the electric control driving device, and the electric control driving device synchronously starts and stops a plurality of direct current deceleration motors through the power switch; the electric control driving device is internally provided with a control system which is used for controlling the rotating speeds of the plurality of direct current deceleration motors.
The invention also provides a damping method of the adjustable multistage synchronous active damping device, which comprises the following steps:
step one, installing an adjustable multistage synchronous active vibration damper on a vibration damping object, and enabling the top of a contact block to be in contact with the vibration damping object;
step two, obtaining the frequency and amplitude of the current vibration waveform of the vibration reduction object through an amplitude detection device;
step three, the electric control driving device connects each active vibration damper to different parts of the vibration damping object according to the frequency and the amplitude of the current vibration waveform of the vibration damping object, and simultaneously controls the rotating speed of the direct current speed reduction motor in each active vibration damper;
step four, an output shaft of the direct current speed reduction motor drives a dowel bar mechanism to drive the contact block to move up and down in a vertical linear direction;
and fifthly, the phase of the vibration waveform generated by the multistage synchronous active vibration damper is opposite to that of the vibration waveform generated by the vibration damper, and the vibration waveform generated by the vibration damper and the vibration waveform generated by the multistage synchronous active vibration damper are mutually offset after being overlapped, so that the purpose of active vibration damping is achieved.
The beneficial effects of the invention are as follows: the arrangement of the plurality of mutually independent active vibration absorbers can enable the multistage synchronous active vibration absorber to generate different active vibration absorption waveforms so as to match the frequency and the amplitude of the vibration waveform generated by the vibration absorption object, so that the vibration waveform generated by the vibration absorption object and the active vibration absorption waveform generated by the active vibration absorber are mutually offset after being overlapped to meet the vibration absorption requirements of different vibration absorption objects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the several views of the drawings. The drawings are not intended to be drawn to scale, with emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a schematic three-dimensional schematic diagram of an adjustable multi-stage synchronous active vibration damper.
Fig. 2 is a schematic diagram of the structure of a single active shock absorber.
Fig. 3 is a schematic three-dimensional structure of the motor mount and the direct current reduction motor.
Fig. 4 is a schematic three-dimensional structure of the dowel mechanism.
Fig. 5 is a schematic three-dimensional structure of an eccentric vibrating wheel.
Fig. 6 is a schematic three-dimensional structure of the connection of the support plate and the bottom plate.
Fig. 7 is a schematic three-dimensional structure of a linear ball guide.
Fig. 8 is a schematic structural view of the snap ring.
Fig. 9 is a schematic structural view of the connecting rod.
FIG. 10 is an illustration of a damping method of an adjustable multi-stage synchronous active damping device.
Wherein, 1, the bottom plate; 101. a first mounting hole; 102. a second mounting hole; 2. an electric control driving device; 201. a power switch; 3. an active vibration damper; 4. a direct current deceleration motor; 401. an access terminal; 5. a wire; 6. a dowel bar mechanism; 7. a contact block; 8. an output shaft; 9. a C-type flat key; 10. a motor mounting seat; 11. a first threaded hole; 12. a bearing; 13. a bearing end cap; 14. a dowel bar; 15. swing rod; 16. a rotating shaft; 17. a connecting rod; 18. eccentric vibrating wheels; 1801. a vibrating wheel body; 1802. a boss; 19. a rocker; 20. a shaft hole; 21. a key slot; 22. a first connection hole; 23. a second connection hole; 24. a clasp; 25. a support plate; 26. a linear ball guide; 27. rib plates; 28. and a third mounting hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Example 1
As shown in fig. 1, the invention provides an adjustable multistage synchronous active vibration damper, which comprises a base plate 1, wherein four corners of the base plate 1 are respectively provided with a first mounting hole 101,4 first mounting holes 101 for realizing the mounting and fixing of the whole adjustable multistage synchronous active vibration damper.
The base plate 1 is provided with an electric control driving device 2 and a plurality of active vibration dampers 3 which are mutually independent, and the active vibration dampers 3 are respectively and electrically connected with the electric control driving device 2 through a plurality of leads 5; the number of active vibration dampers 3 is selected and determined according to vibration damping requirements, specifically, in this embodiment, the number of active vibration dampers 3 is 5, and the 5 active vibration dampers 3 are arranged at equal intervals or unequal intervals along the X-axis direction of the base plate 1, and are spatially independent from each other, and the X-axis direction refers to the length direction of the base plate 1.
As shown in fig. 2, each active vibration damper 3 comprises a direct current speed reduction motor 4 fixedly arranged on a bottom plate 1, the direct current speed reduction motor 4 is electrically connected with an electric control driving device 2 through a lead 5, a dowel bar mechanism 6 is arranged at the output end of the direct current speed reduction motor 4, the dowel bar mechanism 6 is vertically arranged, a contact block 7 is arranged at the top of the dowel bar mechanism 6, and the top of the contact block 7 is used for contacting with a vibration damping object; the dowel bar mechanism 6 is used for converting the rotary motion of the direct-current reduction motor 4 into the reciprocating linear motion of the contact block 7 in the vertical direction.
The electronically controlled driving device 2 is used for synchronously starting and stopping a plurality of direct current speed reduction motors 4 and controlling the rotating speed of the direct current speed reduction motors 4. Specifically, as a specific setting mode of the electric control driving device 2, the electric control driving device 2 is provided with a power switch 201, and the electric control driving device 2 synchronously starts and stops a plurality of direct current deceleration motors 4 through the power switch 201; the electronic control driving device 2 is internally provided with a control system for controlling the rotation speeds of the plurality of direct current deceleration motors 4.
Specifically, the rotation directions of the direct-current reduction motors 4 in the two adjacent active vibration dampers 3 are opposite. The electric control driving device 2 controls the two adjacent direct current speed reduction motors 4 to rotate in opposite directions so as to counteract the vibration of the two adjacent direct current speed reduction motors 4, and the vibration reduction effect of the whole adjustable multistage synchronous active vibration reduction device is improved.
According to the adjustable multistage synchronous active vibration damper, the plurality of active vibration dampers 3 which are mutually independent are arranged on the bottom plate 1, the direct current speed reduction motor 4 in each active vibration damper 3 can respectively and independently adjust the rotation direction and the rotation speed through the electric control driving device 2, the direct current speed reduction motor 4 drives the contact block 7 to reciprocate in the vertical direction through the dowel bar mechanism 6, and further active vibration damping waveforms with different characteristics (namely different frequencies and amplitudes) are generated, the frequencies and the amplitudes of the active vibration damping waveforms are matched with the frequencies and the amplitudes of vibration waveforms generated by a vibration damping object, so that the vibration waveforms generated by the vibration damping object and the active vibration damping waveforms generated by the active vibration damper 3 are mutually offset after being overlapped, multistage active vibration damping can be synchronously carried out on the vibration of a plurality of different frequencies of the vibration damping object, so that the vibration damping requirements of different vibration damping objects are met, and the problem that the vibration damping effect of the existing vibration damping technology is limited is solved.
As shown in fig. 1 and fig. 3, as a specific arrangement mode of the direct current speed reduction motors 4, one side of each direct current speed reduction motor 4 is provided with an access end 401, and the access end 401 is electrically connected with the electric control driving device 2 through a wire 5;
an output shaft 8 is fixedly connected to the output end of each direct current speed reduction motor 4, a C-shaped flat key 9 is arranged on the output shaft 8, and the output shaft 8 is connected with the dowel bar mechanism 6 through the C-shaped flat key 9.
As a specific fixing mode between the direct-current speed reduction motors 4 and the bottom plate 1, each direct-current speed reduction motor 4 is fixedly connected with the bottom plate 1 through a motor mounting seat 10; specifically, a plurality of second mounting holes 102 may be provided on the base plate 1, and the motor mount 10 is fixedly connected with the base plate 1 through the second mounting holes 102.
Preferably, but not limited to, the motor mount 10 has a rectangular parallelepiped structure, a cavity is provided in the motor mount 10, the cavity penetrates through the front and the back of the motor mount 10, a plurality of first threaded holes 11 are provided in the cavity, and the motor mount 10 is fixedly connected with the upper end surface of the bottom plate 1 through the plurality of first threaded holes 11.
The side wall of the direct current speed reduction motor 4, which is close to the output end, is fixedly connected with the side wall of one side of the motor mounting seat 10, and the output shaft 8 penetrates through the side walls of two sides of the motor mounting seat 10 and is fixedly connected with the dowel bar mechanism 6; a bearing 12 is arranged between the output shaft 8 and the side wall of the motor mounting seat 10, and a bearing end cover 13 is arranged on the side wall of the motor mounting seat 10.
The arrangement of the motor mounting seat 10 realizes the fixed connection of the direct-current reduction motor 4 and the bottom plate 1, and avoids the phenomenon that the direct-current reduction motor 4 is upwards moved due to the influence of inertia of the contact block 7 in the process of driving the contact block 7 to move through the dowel mechanism 6.
In this embodiment, the electronic control driving device 2 and the dc reduction motor 4 are both of a type and an internal structure thereof according to the prior art, and the working principle of the two components and the specific connection relationship between the components are not specifically described herein.
Example two
As shown in fig. 1 to 5, a second embodiment of the present invention provides an adjustable multistage synchronous active vibration damper, which is further defined on the basis of the first embodiment, and the improvement is how to specifically arrange the dowel mechanism 6, and other parts not mentioned, please refer to the first embodiment or the prior art.
As shown in fig. 1,4 and 5, as a specific arrangement of the dowel bar mechanisms 6, each dowel bar mechanism 6 includes a dowel bar 14, a contact block 7 is connected to the top end of the dowel bar 14, preferably but not limited to, a threaded hole is provided on the lower end surface of the contact block 7, and a threaded section is provided on the top of the dowel bar 14, meanwhile, the contact block 7 may be configured as a rectangular parallelepiped structure, the upper plane of the contact block 7 is connected to the vibration-damping object, and the upper plane and the lower plane are spatially parallel to each other.
The bottom of the dowel bar 14 is connected with a swinging rod 15, the lower part of the swinging rod 15 is rotationally connected with a connecting rod 17 through a rotating shaft 16, an eccentric vibrating wheel 18 is arranged below the other end of the connecting rod 17, a swinging rod 19 rotationally connected with the connecting rod 17 is convexly arranged on one side wall of the eccentric vibrating wheel 18, a shaft hole 20 connected with the output shaft 8 is arranged on the other side wall of the eccentric vibrating wheel 18, and a key slot 21 matched with the C-shaped flat key 9 is arranged in the shaft hole 20.
The process of generating the active vibration damping waveform by the active vibration damper 3 is: the output shaft 8 on the direct current reducing motor 4 is fixedly connected with the shaft hole 20 of the eccentric vibrating wheel 18, the direct current reducing motor 4 drives the eccentric vibrating wheel 18 to rotate around the axis of the direct current reducing motor 4, the rocker 19 is eccentrically arranged with the eccentric vibrating wheel 18, the rocker 19 is rotationally connected with the connecting rod 17, the connecting rod 17 is rotationally connected with the swinging rod 15 at the bottom of the dowel bar, the eccentric rotation of the rocker 19 is converted into the vertical reciprocating linear motion of the dowel bar through the connecting rod 17, the swinging rod 15 and the dowel bar, the contact block 7 at the top of the dowel bar is driven to move up and down in the Z-axis direction, the Z-axis direction refers to the vertical linear direction, the contact block 7 is contacted with a vibration-reducing object, and the active vibration-reducing wave form generated by the active vibration reducer 3 is further realized, the vibration wave form generated by the active vibration-reducing object is counteracted, and the purpose of active vibration reduction is achieved.
Preferably, but not limited to, as shown in fig. 9, as a specific arrangement mode of the connecting rod 17, two ends of the connecting rod 17 are symmetrically provided with a first connecting hole 22 and a second connecting hole 23 respectively, and the first connecting hole 22 is rotatably connected with the swing rod 15 through the rotating shaft 16; the second connecting hole 23 is in rotary fit with the rocker 19; as shown in fig. 2 and 8, a snap ring 24 is provided on both the shaft 16 and the rocker 19. Specifically, clamping grooves with clamping rings 24 can be formed at two ends of the rotating shaft 16 and on the rocking rod 19, and the clamping rings 24 on the rotating shaft 16 are used for axially limiting the rocking rod 15; the clamping ring 24 on the rocker 19 is used for axially limiting the connecting rod 17, so that the working condition of the whole active vibration damper is stable.
Preferably, but not limited to, as a specific arrangement manner of the eccentric vibrating wheels 18, each eccentric vibrating wheel 18 comprises a vibrating wheel body 1801 with a cylindrical structure, a rocker 19 is arranged on a side wall of one side of the vibrating wheel body 1801, the rocker 19 has a cylindrical structure, and the axis of the rocker 19 is not coincident with the axis of the vibrating wheel body 1801;
a boss 1802 with a cylindrical structure is convexly arranged on the side wall of the other side of the vibrating wheel body 1801, and the axis of the boss 1802 coincides with the axis of the vibrating wheel body 1801; the boss 1802 is provided with a shaft hole 20.
Example III
As shown in fig. 1 to 7, a third embodiment of the present invention provides an adjustable multi-stage synchronous active vibration damper, which is further defined on the basis of the second embodiment, and the improvement is how to fix the dowel 14 in the dowel mechanism 6 specifically, and other parts are not mentioned, please refer to the first embodiment or the prior art.
Specifically, as shown in fig. 6, a support plate 25 is vertically disposed on the bottom plate 1, the support plate 25 and the bottom plate 1 are fixedly connected to form an L-shaped mounting frame, the support plate 25 and the bottom plate 1 may be fixedly connected by welding, or may be fixedly connected by a manner that a plurality of rib plates 27 are disposed on the back of the support plate 25, which is not specifically limited in this embodiment.
The front side wall of the supporting plate 25 is fixedly provided with the same number of the linear ball guide barrels 26 as the active vibration dampers 3, as a specific fixing mode of the linear ball guide barrels 26, a plurality of third mounting holes 28 can be formed in the front side wall of the supporting plate 25, threaded holes corresponding to the third mounting holes 28 are formed in the linear ball guide barrels 26, then the threaded holes are overlapped with the third mounting holes 28, and connecting bolts are arranged between the threaded holes and the third mounting holes, so that the linear ball guide barrels 26 and the supporting plate 25 are fixedly connected.
The linear ball guide 26 is in one-to-one matching relation with the active vibration damper 3; each dowel bar 14 is arranged in the linear ball guide 26, so that the dowel bars 14 and the support plates 25 of the dowel bar mechanism 6 are fixed, the degrees of freedom of the dowel bars 14 in other directions except the Z-axis direction are limited, stable linear motion of the dowel bars 14 and the contact blocks 7 on the dowel bars 14 in the vertical direction is realized, more stable active vibration damping waveforms are provided, and the Z-axis direction refers to the vertical linear direction.
Example IV
As shown in fig. 10, the present embodiment provides, based on the first to third embodiments, a vibration damping method of an adjustable multistage synchronous active vibration damping device, including:
step one, an adjustable multistage synchronous active vibration damper is arranged on a vibration damping object, and the top of a contact block 7 is contacted with the vibration damping object;
step two, obtaining the frequency and amplitude of the current vibration waveform of the vibration reduction object through an amplitude detection device;
step three, the electric control driving device 2 connects each active vibration damper 3 to different parts of the vibration damping object according to the frequency and the amplitude of the current vibration waveform of the vibration damping object, and simultaneously controls the rotating speed of the direct current speed reduction motor 4 in each active vibration damper 3;
step four, an output shaft 8 of the direct current speed reduction motor 4 drives a dowel bar mechanism 6 to drive a contact block 7 to move up and down in a vertical linear direction;
and fifthly, the phase of the vibration waveform generated by the multistage synchronous active vibration damper is opposite to that of the vibration waveform generated by the vibration damper, and the vibration waveform generated by the vibration damper and the vibration waveform generated by the multistage synchronous active vibration damper are mutually offset after being overlapped, so that the purpose of active vibration damping is achieved.
In summary, the arrangement of the plurality of mutually independent active vibration dampers 3 can enable the multistage synchronous active vibration damper to generate different active vibration damping waveforms so as to match the frequency and the amplitude of the vibration waveform generated by the vibration damping object, so that the vibration waveform generated by the vibration damping object and the active vibration damping waveform generated by the active vibration damper 3 are mutually offset after being overlapped, and vibration damping requirements of different vibration damping objects are met.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The adjustable multistage synchronous active vibration damper is characterized by comprising a bottom plate, wherein an electric control driving device and a plurality of active vibration dampers which are mutually independent are arranged on the bottom plate, and the active vibration dampers are respectively and electrically connected with the electric control driving device through a plurality of wires;
each active vibration damper comprises a direct-current speed reduction motor fixedly arranged on a bottom plate, the direct-current speed reduction motor is electrically connected with an electric control driving device through a wire, a dowel bar mechanism is arranged at the output end of the direct-current speed reduction motor, the dowel bar mechanism is vertically arranged, a contact block is arranged at the top of the dowel bar mechanism, and the top of the contact block is used for contacting a vibration damping object;
the dowel bar mechanism is used for converting the rotary motion of the direct-current speed reduction motor into reciprocating linear motion in the vertical direction of the contact block;
the electric control driving device is used for synchronously starting and stopping a plurality of direct current speed reduction motors and controlling the rotating speed of the direct current speed reduction motors.
2. The adjustable multistage synchronous active vibration damper according to claim 1, wherein one side of each of the dc reduction motors is provided with an access terminal, and the access terminal is electrically connected with the electric control driving device through a wire;
the output end of each direct current speed reduction motor is fixedly connected with an output shaft, a C-shaped flat key is arranged on the output shaft, and the output shaft is connected with the dowel bar mechanism through the C-shaped flat key.
3. An adjustable multistage synchronous active vibration damper according to claim 2 wherein each of said dc reduction motors is fixedly connected to said base plate by a motor mount;
the motor mounting seat is of a cuboid structure, a cavity is formed in the motor mounting seat, the cavity penetrates through the front face and the back face of the motor mounting seat, a plurality of threaded holes are formed in the cavity, and the motor mounting seat is fixedly connected with the upper end face of the bottom plate through the plurality of threaded holes;
the side wall of the direct current speed reduction motor, which is close to the output end, is fixedly connected with the side wall of one side of the motor mounting seat, and the output shaft penetrates through the side walls of the two sides of the motor mounting seat to be fixedly connected with the dowel bar mechanism; a bearing is arranged between the output shaft and the side wall of the motor mounting seat, and a bearing end cover is arranged on the side wall of the motor mounting seat.
4. The adjustable multistage synchronous active vibration damper according to claim 2, wherein each dowel bar mechanism comprises a dowel bar, the top end of the dowel bar is connected with the contact block, the bottom end of the dowel bar is connected with a swinging rod, the lower part of the swinging rod is rotationally connected with a connecting rod through a rotating shaft, an eccentric vibrating wheel is arranged below the other end of the connecting rod, a rocker rotationally connected with the connecting rod is arranged on one side wall of the eccentric vibrating wheel in a protruding mode, a shaft hole connected with the output shaft is arranged on the other side wall of the eccentric vibrating wheel, and a key slot matched with the C-shaped flat key is arranged in the shaft hole.
5. The adjustable multistage synchronous active vibration damper according to claim 4, wherein a first connecting hole and a second connecting hole are symmetrically arranged at two ends of the connecting rod, and the first connecting hole is rotationally connected with the swing rod through the rotating shaft; the second connecting hole is in running fit with the rocker; and the rotating shaft and the rocker are both provided with snap rings.
6. The adjustable multistage synchronous active vibration damper according to claim 4, wherein each eccentric vibration wheel comprises a vibration wheel body with a cylindrical structure, the rocker is arranged on one side wall of the vibration wheel body, the rocker is of a cylindrical structure, and the axis of the rocker is not coincident with the axis of the vibration wheel body;
a boss with a cylindrical structure is convexly arranged on the side wall of the other side of the vibrating wheel body, and the axis of the boss is overlapped with the axis of the vibrating wheel body; the boss is provided with the shaft hole.
7. The adjustable multistage synchronous active vibration damper according to claim 4, wherein a supporting plate is vertically arranged on the bottom plate, and the side walls of the supporting plate are fixedly provided with the same number of linear ball guides as the active vibration dampers, and the linear ball guides are in one-to-one matching relation with the active vibration dampers; each dowel bar is arranged in the linear ball guide cylinder.
8. An adjustable multistage synchronous active vibration damper according to claim 1 wherein the direction of rotation of said dc reduction motors in two adjacent said active vibration dampers is opposite.
9. The adjustable multistage synchronous active vibration damper according to claim 1, wherein a power switch is arranged on the electric control driving device, and the electric control driving device synchronously starts and stops a plurality of the direct current deceleration motors through the power switch;
the electric control driving device is internally provided with a control system which is used for controlling the rotating speeds of the plurality of direct current deceleration motors.
10. A vibration damping method of an adjustable multistage synchronous active vibration damping device according to any one of claims 1 to 9, comprising:
step one, installing an adjustable multistage synchronous active vibration damper on a vibration damping object, and enabling the top of a contact block to be in contact with the vibration damping object;
step two, obtaining the frequency and amplitude of the current vibration waveform of the vibration reduction object through an amplitude detection device;
step three, the electric control driving device connects each active vibration damper to different parts of the vibration damping object according to the frequency and the amplitude of the current vibration waveform of the vibration damping object, and simultaneously controls the rotating speed of the direct current speed reduction motor in each active vibration damper;
step four, an output shaft of the direct current speed reduction motor drives a dowel bar mechanism to drive the contact block to move up and down in a vertical linear direction;
and fifthly, the phase of the vibration waveform generated by the multistage synchronous active vibration damper is opposite to that of the vibration waveform generated by the vibration damper, and the vibration waveform generated by the vibration damper and the vibration waveform generated by the multistage synchronous active vibration damper are mutually offset after being overlapped, so that the purpose of active vibration damping is achieved.
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| JP2009275823A (en) * | 2008-05-14 | 2009-11-26 | Sinfonia Technology Co Ltd | Vibration damping device and vehicle |
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| CN214126084U (en) * | 2020-11-24 | 2021-09-07 | 北方民族大学 | Wolfberry picking system |
| CN215042284U (en) * | 2021-04-20 | 2021-12-07 | 北京安声科技有限公司 | Active vibration damping device, automobile seat and automobile |
| CN215521799U (en) * | 2021-09-29 | 2022-01-14 | 内蒙古迪创隔振设备有限公司 | Vibration damping supporting leg for vibration isolation platform |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009275823A (en) * | 2008-05-14 | 2009-11-26 | Sinfonia Technology Co Ltd | Vibration damping device and vehicle |
| CN107488984A (en) * | 2017-10-18 | 2017-12-19 | 南京卓策知识产权服务有限公司 | A kind of double turning barrel damping washing machines |
| CN207538992U (en) * | 2017-10-31 | 2018-06-26 | 舟山梅朋水处理有限公司 | Fluid pressure pick-up device and equipment |
| CN214126084U (en) * | 2020-11-24 | 2021-09-07 | 北方民族大学 | Wolfberry picking system |
| CN215042284U (en) * | 2021-04-20 | 2021-12-07 | 北京安声科技有限公司 | Active vibration damping device, automobile seat and automobile |
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