CN119122993A - A micro-dynamic active shock absorber - Google Patents
A micro-dynamic active shock absorber Download PDFInfo
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- CN119122993A CN119122993A CN202411290080.9A CN202411290080A CN119122993A CN 119122993 A CN119122993 A CN 119122993A CN 202411290080 A CN202411290080 A CN 202411290080A CN 119122993 A CN119122993 A CN 119122993A
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- Prior art keywords
- vibration
- micro
- exciter
- damped
- vibration exciter
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Classifications
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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
- F16F15/02—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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/1005—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/1028—Vibration-dampers; Shock-absorbers using inertia effect the inertia-producing means being a constituent part of the system which is to be damped
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
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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
- F16F2230/00—Purpose; Design features
- F16F2230/08—Sensor arrangement
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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
- F16F2230/00—Purpose; Design features
- F16F2230/18—Control arrangements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
本发明公布了一种微动力有源减振器，属于减振相关技术领域；包括激振器、信号处理器、传感器；所述激振器通过弹簧悬浮式设置在机体上；所述机体安装在被减振设备上；所述激振器为单自由度的振动系统；所述传感器获取被减振设备的振动频率、相位和振幅；所述信号处理器获取传感器的信号，并控制激振器振动；激振器产生的振动与被减振设备的振动的频率相同，相位相反。本发明提供了一种微动力有源减振器，它采用微动力驱动器，通过精确控制导振块的振动，激发激振器共振产生较大的振动力抵消被减振设备的振动，从而达到减振效果。
The present invention discloses a micro-power active vibration absorber, which belongs to the technical field related to vibration reduction; it includes an exciter, a signal processor, and a sensor; the exciter is arranged on a body in a spring suspension manner; the body is installed on the device to be damped; the exciter is a single-degree-of-freedom vibration system; the sensor obtains the vibration frequency, phase and amplitude of the device to be damped; the signal processor obtains the signal of the sensor and controls the vibration of the exciter; the vibration generated by the exciter has the same frequency as the vibration of the device to be damped, but the phase is opposite. The present invention provides a micro-power active vibration absorber, which adopts a micro-power driver, and through the precise control of the vibration of the vibration guide block, stimulates the resonance of the exciter to generate a larger vibration force to offset the vibration of the device to be damped, thereby achieving a vibration reduction effect.
Description
Technical Field
The invention belongs to the technical field of vibration reduction, and particularly relates to a micro-power active vibration absorber.
Background
Vibration control is a critical technical challenge in the field of mechanical engineering. Vibration problems are prevalent in a variety of mechanical devices that affect not only the stability and operating efficiency of the device, but may also lead to a series of problems such as structural fatigue, noise pollution, and reduced accuracy. The presence of these problems not only shortens the service life of the equipment and increases maintenance costs, but may also pose a threat to the health and safety of the operators. Therefore, developing effective vibration damping techniques is critical to improving the performance and reliability of mechanical devices.
Conventional vibration dampers typically employ passive vibration damping techniques, such as the use of springs, dampers, and the like to absorb and isolate vibrations. While these approaches can reduce vibration to some extent, they often suffer from the limitation that passive dampers tend to have difficulty in precisely controlling the excitation frequency and phase, meaning that they cannot effectively damp vibration for a particular vibration frequency, resulting in an undesirable damping effect.
To overcome these limitations, it is necessary to develop a new micro-dynamic active vibration absorber.
Disclosure of Invention
Aiming at the problems, the invention provides a micro-power active vibration absorber which is used for solving the technical problems that the traditional vibration absorber can not effectively control vibration under specific frequency and has poor vibration absorbing effect.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A micro-power active vibration damper comprises a vibration exciter, a signal processor and a sensor;
The vibration exciter is arranged on the machine body in a suspended mode through a spring, and the machine body is arranged on vibration-damped equipment;
the vibration exciter is a vibration system with single degree of freedom;
The sensor acquires the vibration frequency, the phase and the amplitude of the equipment to be damped;
The signal processor acquires signals of the sensor and controls the vibration exciter to vibrate, and the vibration generated by the vibration exciter has the same frequency and opposite phase with the vibration of the vibration damping equipment.
As a further improvement of the scheme, a driver and a vibration guide block which is driven by the driver to reciprocate are arranged in the vibration exciter.
As a further improvement of the above, the body comprises two mounting plates;
the mounting plates are connected with each other through a mounting shaft;
the vibration exciter is arranged on the mounting shaft through a slide Kong Huodong arranged on the side edge and can slide on the mounting shaft;
the side of the vibration exciter is provided with a guide shaft with the same vibration direction as the vibration exciter, two ends of the guide shaft are slidably arranged in guide holes of corresponding mounting plates, springs are sleeved at two ends of the guide shaft, and the springs are positioned between the mounting plates and the guide holes.
As a further improvement of the scheme, the sliding holes are distributed on the side wall of the vibration exciter in an annular array.
As a further improvement of the scheme, the mounting holes are distributed on the side wall of the vibration exciter in an annular array.
As a further improvement of the scheme, the sliding holes and the mounting holes are distributed on the side wall of the vibration exciter in a staggered mode.
As a further improvement of the scheme, the mounting plate is provided with movable holes for the movement of the vibration exciter, and the mounting shaft and the guide shaft are distributed around the movable holes.
As a further improvement of the above scheme, the machine body is provided with a hole connected with the vibration damping device.
As a further improvement of the above, the sensor is provided on the device to be damped.
Compared with the prior art, the invention has the beneficial effects that:
① The invention uses smaller power to excite the vibration exciter to resonate, and generates larger counter force for counteracting the vibration of the host machine. The invention adopts the micro-power driver, and the vibration of the vibration guide block is accurately controlled, so that the vibration exciter is excited to resonate to generate larger vibration force to counteract the vibration of the vibration-damped equipment, thereby achieving the vibration-damping effect.
② The invention is an active shock absorber, namely the object is clear, and the active shock absorber is only aimed at the vibration of a certain frequency band needing to be counteracted by the vibration absorber. The vibration absorber can clearly identify and absorb vibration aiming at specific vibration frequency, and improves vibration absorption effect.
③ The vibration excitation frequency and the phase are controlled, and the vibration exciter can precisely control the frequency and the phase of the vibration exciter to match the vibration characteristics of vibration-damped equipment, so that effective vibration cancellation is realized.
Drawings
Fig. 1 is a top view of the present invention.
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1.
FIG. 3 is a cross-sectional view taken at B-B in FIG. 1.
Fig. 4 is a schematic view of a machine body according to the present invention.
Fig. 5 is a first installation schematic of the present invention.
Fig. 6 is a second mounting schematic of the present invention.
Fig. 7 is a third mounting schematic of the present invention.
The vibration guide device comprises a vibration guide block 1, a driver 3, a vibration exciter 4, a spring 5, a machine body 6, a signal processor 7, a sensor 8, a guide shaft 9 and a mounting shaft.
Detailed Description
The following detailed description of the invention, in conjunction with the examples, is intended to be merely exemplary and explanatory and should not be construed as limiting the scope of the invention in any way, as described in detail below, in order to provide a better understanding of the invention as embodied in the present invention.
As shown in fig. 1-4, the embodiment has the specific scheme that the micro-power active vibration damper comprises a vibration exciter 3, a signal processor 6 and a sensor 7;
The vibration exciter 3 is arranged on the machine body 5 in a suspending way through a spring 4, and the machine body 5 is arranged on vibration-damped equipment;
the vibration exciter 3 is a vibration system with single degree of freedom, and a driver 2 and a vibration guide block 1 which is driven by the driver 2 to reciprocate are arranged in the vibration exciter 3.
The sensor 7 acquires the vibration frequency, phase and amplitude of the device to be damped;
the signal processor 6 acquires the signal of the sensor 7 and controls the vibration of the vibration exciter 3, and the vibration generated by the vibration exciter 3 has the same frequency and opposite phase with the vibration of the equipment to be damped.
As shown in fig. 2 to 4, as a preferred mode of the above embodiment, the body 5 includes two mounting plates;
The mounting plates are connected with each other through a mounting shaft 9;
the vibration exciter 3 is arranged on the mounting shaft 9 through a slide Kong Huodong arranged on the side edge and can slide on the mounting shaft 9;
The side of the vibration exciter 3 is provided with a guide shaft 8 with the same vibration direction as the vibration exciter 3, two ends of the guide shaft 8 are slidably arranged in guide holes of corresponding mounting plates, two ends of the guide shaft 8 are sleeved with springs 4, and the springs 4 are positioned between the mounting plates and the guide holes.
As a preferred mode of the above embodiment, the sliding holes are distributed on the side wall of the vibration exciter 3 in a ring array.
As a preferred mode of the above embodiment, the mounting holes are distributed in an annular array on the side wall of the vibration exciter 3.
As shown in fig. 1, as a preferable mode of the above embodiment, the slide holes and the mounting holes are alternately distributed on the side wall of the vibration exciter 3.
As shown in FIG. 1, as a preferable mode of the above embodiment, a movable hole is provided on the mounting plate for the movement of the vibration exciter 3, and a mounting shaft 9 and a guide shaft 8 are distributed around the movable hole.
As shown in fig. 1 to 4, as a preferable mode of the above embodiment, the body 5 is provided with a hole for attachment of a damper to a device to be damped.
As a preferred form of the above embodiment, the sensor 7 is provided on the device to be damped for acquiring the signal.
The invention has the specific working principle that:
There are two vibration waves in the same direction:
x1＝A1eiwx
x2＝A2ei(wx+φ)
Composite vibration x=x 1+x2
Wherein x 1、x2 is the displacement of the device to be damped and the micro-power damper respectively, and A 1、A2 is the displacement of the device to be damped and the micro-power damper respectively
The vibration amplitude of the dynamic vibration absorber, w is the vibration frequency, and phi is the phase difference of two vibrations.
Composite amplitude
It is apparent that the amplitude a of the composite vibration depends on the amplitude a 1,A2 and the phase difference phi of the respective vibrations.
When the phase difference phi=0°, the resultant amplitude a=a 1+A2.
When the phase difference Φ=180°, the resultant amplitude a=a 1-A2.
To achieve the vibration damping effect, a natural frequency w 0 is artificially added to the equipment to be damped, the natural frequency w is equal to the vibration of the frequency w of the equipment to be damped (namely, w 0 =w), and the phase difference phi of the vibration of the additional vibration device and the vibration of the equipment is close to 180 degrees.
The signal processor 6 converts and transmits the signal of the sensor 7 to the vibration exciter 3, so that the vibration exciter 3 generates vibration with the same vibration frequency and opposite phase to the vibration frequency of the vibration-damped equipment. The driver 2 and the vibration guide block 1 are arranged in the vibration exciter 3, the driver 2 drives the vibration guide block 1 under the control of the signal processor 6, and the vibration exciter 3 is driven to resonate by vibration waves of X 2＝A2ei(wt+φ) according to the required vibration frequency w=w 0, the vibration wave phase phi and the force amplitude F 0 to generate the vibration exciting force F=F 0eiwt.
The vibration exciter comprises a vibration system with single degree of freedom and natural frequency of w 0 = w, and the vibration system is subjected to simple harmonic vibration under the action of thrust. Because w 0 =w, the resonance energy of the vibration exciter is increased, and because the phase difference phi=180 degrees between the vibration generated by the vibration exciter system and the vibration of equipment to be damped is equal to the phase difference phi=180 degrees in the same direction and the same frequency, the composite amplitude of two rows of vibration waves is reduced, and the purpose of damping is achieved.
In particular, as shown in fig. 5, the micro-dynamic active vibration absorber may be installed below the device to be damped as needed. As shown in fig. 6, the active power shock absorber may be mounted above the device being damped. As shown in fig. 7, the active power damper may be mounted to the side of the device being damped.
Examples:
for example, a device has 4 support points:
The vibration acceleration level la=136 dB of the vibration damping device is known, the mass m=325 kg of the vibration damping device, the vibration damping device motor speed n=1000 rpm;
the allowable vibration acceleration level of the vibration damping device is [ La ] =129 dB, and the micro-power active vibration damper is adopted for vibration damping:
the rotation speed of the motor can be known:
Frequency of Angular velocity ofSquare of angular velocity
Because the vibration acceleration level is: Wherein reference acceleration a 0＝10-6m/s2
The acceleration of the device support point can be calculated
Displacement of the bearing point
So the vibration power n= mgBw =325× 9.8X6.1X10 -4 ×102=198W
It is now required how much power needs to be generated to counteract the vibrations of the damped device:
from the allowable vibration acceleration level [ La ] =129 dB, it can be found that:
allowable acceleration
Allowable displacement
Allowable power [ N ] =mg [ B ] w=325 x 9.8 x 2.72 x 10 -4 x 102 = 88.5W
The resulting power Δn=n- [ N ] =198-88.5=110W that requires damping can cancel out the vibration of the device being damped.
Micro-dynamic active vibration absorbers with a power greater than 110W are now required to damp vibration.
The mass of the known vibration exciter is M 1 =36 kg;
displacement B 1 = 0.0032m of the exciter;
The power N 1＝M1gB1 w=36×9.8× 0.0032×102=115w > (110W) which can be generated by the vibration exciter can meet the requirement.
The exciting force required by the exciter can be deduced by an amplitude formula of forced vibration caused by simple harmonic exciting force:
wherein P 1 is the required exciting force, the unit is N, B 1 is the amplitude of the exciter, the unit is m, w 0 is the natural frequency of the exciter spring system, and the unit is W is the exciting force frequency of the driver, and the unit isAlpha is the damping coefficient, and the unit is
The following formula is derived:
and because w 0 =w
So P 1＝B1M1 2. Alpha. W
So the exciting force P 1＝B1M1 2 required by the device αw=0.0032×36× 2×0.5×102=12n
The displacement B 2 = 0.0032m of the vibration-guiding block is known;
Since this force P 1 is generated by the actuator driving the vibration-guiding block, the actuator requires power:
the ratio of the power consumed to the power required is now Approximately 4%.
So called micro-power.
Considering that the planar position of the vibration force F of the main machine is not necessarily in the geometric center, when the mass of the micro-dynamic active damper is not in a straight line with the main machine F, a torque is generated, so that the micro-dynamic active damper is generally divided into four sets, one on each supporting point.
It should be noted that, in this document, the terms include, comprise, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The principles and embodiments of the present invention are described herein by applying specific examples, and the above examples are only used to help understand the method and core idea of the present invention. The foregoing is merely illustrative of the preferred embodiments of the invention, and it will be appreciated that numerous modifications, adaptations and variations of the invention can be made by those skilled in the art without departing from the principles of the invention, and that other features and advantages of the invention can be combined in any suitable manner, and that no improvement in the design or design of the invention is intended to be applied directly to other applications.
Claims (9)
1. The micro-power active vibration damper is characterized by comprising a vibration exciter (3), a signal processor (6) and a sensor (7);
The vibration exciter (3) is arranged on the machine body (5) in a suspended mode through a spring (4), and the machine body (5) is arranged on vibration-damped equipment;
the vibration exciter (3) is a vibration system with single degree of freedom;
The sensor (7) acquires the vibration frequency, the phase and the amplitude of the equipment to be damped;
the signal processor (6) acquires signals of the sensor (7) and controls the vibration exciter (3) to vibrate, and the vibration generated by the vibration exciter (3) has the same frequency and opposite phase with the vibration of the vibration-damped equipment.
2. The micro-power active vibration damper according to claim 1, wherein a driver (2) and a vibration guide block (1) which is driven by the driver (2) to reciprocate are arranged in the vibration exciter (3).
3. A micro-dynamic active shock absorber according to claim 1, wherein the body (5) comprises two mounting plates;
The mounting plates are connected with each other through a mounting shaft (9);
The vibration exciter (3) is arranged on the mounting shaft (9) through a slide Kong Huodong arranged on the side edge and can slide on the mounting shaft (9);
The side of the vibration exciter (3) is provided with a guide shaft (8) with the same vibration direction as the vibration direction of the vibration exciter (3), two ends of the guide shaft (8) are slidably arranged in guide holes of corresponding mounting plates, two ends of the guide shaft (8) are sleeved with springs (4), and the springs (4) are positioned between the mounting plates and the guide holes.
4. A micro-dynamic active vibration absorber according to claim 3, wherein the sliding holes are distributed in an annular array on the side wall of the vibration exciter (3).
5. A micro-dynamic active vibration absorber according to claim 3, wherein the mounting holes are distributed in an annular array on the side wall of the vibration exciter (3).
6. A micro-dynamic active vibration absorber according to claim 3, wherein the sliding holes and the mounting holes are distributed on the side wall of the vibration exciter (3) in a staggered manner.
7. A micro-dynamic active shock absorber according to claim 3, characterized in that the mounting plate is provided with a movable hole for the movement of the vibration exciter (3), and the mounting shaft (9) and the guiding shaft (8) are distributed around the movable hole.
8. A micro-dynamic active shock absorber according to claim 1, characterized in that the body (5) is provided with holes for connection to the device to be damped.
9. A micro-dynamic active shock absorber according to claim 1, characterized in that the sensor (7) is arranged on the device to be damped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411290080.9A CN119122993A (en) | 2024-09-14 | 2024-09-14 | A micro-dynamic active shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411290080.9A CN119122993A (en) | 2024-09-14 | 2024-09-14 | A micro-dynamic active shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119122993A true CN119122993A (en) | 2024-12-13 |
Family
ID=93763809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411290080.9A Pending CN119122993A (en) | 2024-09-14 | 2024-09-14 | A micro-dynamic active shock absorber |
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| Country | Link |
|---|---|
| CN (1) | CN119122993A (en) |
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2024
- 2024-09-14 CN CN202411290080.9A patent/CN119122993A/en active Pending
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