CN109707783A - Driveline damping damping unit based on piezoelectric stack - Google Patents
Driveline damping damping unit based on piezoelectric stack Download PDFInfo
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- CN109707783A CN109707783A CN201910114925.1A CN201910114925A CN109707783A CN 109707783 A CN109707783 A CN 109707783A CN 201910114925 A CN201910114925 A CN 201910114925A CN 109707783 A CN109707783 A CN 109707783A
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- piezoelectric stack
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- butterfly wing
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Abstract
The present invention is a kind of driveline damping damping unit based on piezoelectric stack, comprising: outer ring is cylinder barrel shaped, and there are multiple protrusions of circumference uniform distribution in inside；Inner ring is cylinder barrel shaped, and there are multiple protrusions of circumference uniform distribution in outside；The butterfly wing, section are " V " shape, including with upper plane two-arm and with the middle part of lower plane；Plane is connect with outer ring protrusion bottom surface on one side arm of the butterfly wing, and plane is connect with inner ring protrusion bottom surface on another side arm；Piezoelectric stack is clipped between two axially opposing butterfly wings, and the both ends of piezoelectric stack are contacted with the middle part lower plane of two butterfly wings respectively；Piezoelectric stack is connected with apparatus for storing electrical energy.The device first converts mechanical energy into magnetic energy, is reconverted into electric energy.Electric energy is dissipated or collected using shunt circuit.And then realize and remove vibrational energy from system, to generate net damping, achieve the purpose that vibration and noise reducing.
Description
Technical field
The invention belongs to the vibration and noise reducing fields of machine driven system, are related to a kind of driveline damping based on piezoelectric stack
Damping unit.
Background technique
In daily life and work, mechanical equipment is widely used, and in the process of running, noise pollution is very
Seriously.Therefore, how vibration noise be effectively reduced particularly significant.Nowadays, in order to achieve the effect that vibration and noise reducing,
The materials such as copper, iron, aluminium are widely used in mechanical equipment, since these materials only have lesser interior damping, can only be disappeared
Less vibrational energy is consumed, after being acted on by exciting force, stronger noise can be generated in component surface.Piezoelectric material is only with it
Special characteristic highlights, when extruding of the piezoelectric material by both ends axial force, according to " piezoelectric effect " of piezoelectric material, both
Certain electrolyte are deformed in a certain direction by the effect of external force in piezoelectric material, inside can generate polarization phenomena,
There is positive and negative opposite charge on its two apparent surfaces simultaneously.The electric energy using shunt circuit dissipation or is used into energy
Memory device carries out the collection of energy, so that net damping can be generated by removing energy from system.
It is special to the vibration damping of gear train axial vibration that damping ring has been delivered in Harbin Institute of Technology king Qingyang in 2013 et al.
Journal of Sex Research analyzes the vibration mechanism and damping ring vibration attenuation mechanism of gear train.Establish gear-damping loop system axial direction
The kinetics equation group of vibration solves kinetics equation using harmonic wave equilibrium method, has obtained approximate analytic solution, and and numerical solution into
It has gone and has compared.The senior engineer of Tangshan track bus limited liability company in 2016, which is subordinate to, has newly delivered high-speed rail wheel damping ring
Vibration and noise reducing experimental study is found that influence of the damping ring to the quality, rigidity of wheel can be ignored, is hindered simultaneously by comparative analysis
Buddhist nun's ring can dramatically increase the damping ratios of wheel medium-high frequency section, to significantly suppress the vibration peak of these frequency ranges.Mesh
In the preceding research for vibration and noise reducing damping unit, report there is no by the design of core damping material of piezoelectric stack.
Summary of the invention
Goal of the invention: the present invention devises a kind of driveline damping damping unit based on piezoelectric stack, for reducing machine
Structural noise in device.
Technical solution:
Driveline damping damping unit based on piezoelectric stack, structure include:
Outer ring is cylinder barrel shaped, and there are multiple protrusions of circumference uniform distribution in inside；
Inner ring is cylinder barrel shaped, and there are multiple protrusions of circumference uniform distribution in outside；
The butterfly wing, section are " V " shape, including with upper plane two-arm and with the middle part of lower plane；
Plane is connect with outer ring protrusion bottom surface on one side arm of the butterfly wing, and plane and inner ring protrusion bottom surface connect on another side arm
It connects；
Piezoelectric stack is clipped between two axially opposing butterfly wings, the both ends of the piezoelectric stack middle part with two butterfly wings respectively
Lower plane contact；
Piezoelectric stack is connected with energy collecting device by conducting wire.
Preferably: being connected by screw between protrusion and the butterfly wing；It is connected by screw between the butterfly wing and piezoelectric stack.
Preferably: the structure axial symmetry of outer ring or inner ring and symmetrical above and below；The protrusion of outer ring or inner ring is 8, each
The center position of protrusion is equipped with tapped through hole.
Preferably: positioning annulus is above provided with the through-hole of circumference uniform distribution, number of openings and butterfly for circular flake structure
Wing quantity is identical；It positions annulus to pass through among the two-arm of each butterfly wing, screw passes through the through-hole connection butterfly wing and piezoelectric stack.
Preferably: butterfly wing arm is trapezoidal.
Preferably: the energy collecting device is battery or capacitor.
Advantage and effect:
Copper, iron, aluminium etc. only have lesser interior damping and less consumption vibrational energy, after exciting force effect, have relatively strong
Noise result from component surface.Device in the present invention is by intrinsic " piezoelectric effect " characteristic of piezoelectric stack by mechanical energy
The mode for being converted to electric energy consumes vibrational energy, and effect of vibration and noise reduction will be much better than the materials such as copper, iron, aluminium, and in vibration damping
Vibration loss energy is converted into electric energy also recoverable simultaneously, effectively raises the utilization rate of energy.
The butterfly wing has unique concave structure, is the key that this invention, when annular wall inner side and outer side is by radial direction
When the extruding of power, by the transmitting of the butterfly wing, piezoelectric stack can be squeezed on axial direction, with protection materials from potentially disruptive
Stretching and shearing force.
Work as with the comparable elasticity modulus of steel, fissipation factor with rubber phase when having for piezoelectric stack when compressing.Piezoelectricity
Stacking has high compression-strength along its axis direction that polarizes.
Detailed description of the invention:
Fig. 1 is the schematic diagram of the driveline damping damping unit based on piezoelectric stack
Fig. 2 is the top view of the driveline damping damping unit based on piezoelectric stack
Fig. 3 is the vertical cross-sectional view of the driveline damping damping unit based on piezoelectric stack
Fig. 4 is the main view of outer ring
Fig. 5 is the vertical sectional view of outer ring
Fig. 6 is the left view of outer ring
Fig. 7 is the main view of inner ring
Fig. 8 is the top view of inner ring
Fig. 9 is the main view of the butterfly wing.
Figure 10 is the left view of the butterfly wing.
Figure 11 is the top view of the butterfly wing.
Figure 12 is the main view for positioning annulus
Figure 13 is the left view for positioning annulus
Figure 14 is column piezoelectric stack
Description of symbols:
1- outer ring, 2- inner ring, 3- position annulus, the 4- butterfly wing, 5- piezoelectric stack, 6- electric energy storage device.
Specific embodiment:
For the noise level that rotating machinery generates from unpleasant to nocuousness, main noise source is high-speed drive Account Dept
Part, such as gear, bearing, axis, fan etc., these components generate periodic power.The material of current most important vibration and noise reducing
Copper, iron, the materials such as aluminium and consume less vibrational energy at only lesser interior damping, after exciting force effect, have compared with
Strong noise results from component surface.In order to overcome this disadvantage, a kind of driveline damping resistance based on piezoelectric stack has been invented
Buddhist nun's device, to reduce the structural noise in machine.It has the appearance of becket, may be mounted at any two power train part
Between.The device is higher than traditional damping unit hardness, this can be used for it in traditional system, and will not destroy
The normal operating of system.
The present invention is a kind of driveline damping damping unit based on piezoelectric stack, using piezoelectric stack as core element.This
The working principle of invention is: the upper and lower ends of piezoelectric stack are contacted with the bottom surface of two butterfly wings respectively, the upper end of the two butterfly wings
Face is in contact with positioning ring textures, piezoelectric stack, and the center line of the butterfly wing and positioning annulus three are overlapped, and pass through screw
It is attached and pre-tightens.Two end faces respectively connect output of the conducting wire for electric energy, another termination of conducting wire to piezoelectric stack up and down
The electric energy at piezoelectric stack both ends is collected by electric energy storage device.The upper end of butterfly wing side arm and outer ring high spot
Bottom surface a or a ' are contacted, and the threaded hole at outer ring convex center position is overlapped with the screw thread centerline hole on butterfly wing arm, the two
It is connected by screw.The upper end of butterfly wing other side arm is contacted with the bottom surface b or b ' of inner ring high spot, inner ring convex center position
The threaded hole for setting place is overlapped with the center line of the threaded hole on butterfly wing arm, and the two is connected by screw.Two inside and outside ring
When extruding of the side by radial force, by the transmitting of the butterfly wing, squeeze piezoelectric stack in the axial direction, piezoelectric stack by
When the extruding of external force, according to the piezoelectric property of piezoelectric stack, it will lead to certain electrolysis inside piezoelectric stack when by external force
Matter is deformed in a certain direction by the effect of external force, inside can generate polarization phenomena, while two at it are opposite
Occurs positive and negative opposite charge on surface, which reaches electric energy storage device by conducting wire and carry out collection of energy, from system
Energy is removed to generate net damping, has effectively achieved the effect of vibration and noise reducing in this way.
Fig. 1 is the schematic diagram of the assembly of the driveline damping damping unit based on piezoelectric stack.Fig. 2 is based on piezoelectric stack
Driveline damping damping unit top view, Fig. 3 be the driveline damping damping unit based on piezoelectric stack vertical throwing view
Figure.At work, firstly, carrying out preload appropriate to piezoelectric stack 5 by screw.When outer ring 1 and inner ring 2 are by two sides radial direction
When the extruding of power.The radial force of the two passes to the butterfly wing 4 and positioning annulus 3, by the transmitting of the butterfly wing 4, in the axial direction
It is certain to will lead to 5 inside of piezoelectric stack according to the piezoelectric property of piezoelectric stack 5 for upper extruding piezoelectric stack 5 when by external force
Electrolyte is deformed in a certain direction by the effect of external force, inside can generate polarization phenomena, while at its two
Occurs positive and negative opposite charge on apparent surface, which reaches electric energy storage device 6 by conducting wire and carry out collection of energy.
As shown in Fig. 4,5 and 6: the overall structure of outer ring 1 is circular ring shape, and its structure is axial symmetry and symmetrical above and below,
In the inside circumference of outer ring 1, upper and lower ends it is each it is equidistant be disposed with eight protrusions, be equipped in the center position of each protrusion
The threaded hole penetrated through entirely.
As shown in FIG. 7 and 8: the overall structure of inner ring 2 is circular ring shape, and its structure is axial symmetry and symmetrical above and below,
In outer circumference, upper and lower ends it is each it is equidistant be disposed with eight protrusions, the center position of each protrusion be equipped with completely through
Threaded hole.Inner ring 2 is mounted on the inside of outer ring 1.
As shown in Fig. 9,10 and 11: the butterfly wing 4 is bilateral symmetry.Its center position is vertically equipped with one
Perforative threaded hole has the protrusion of one section of circular ring shape at the proximal edge of bottom surface.Each side there is one in 4 upper end of the butterfly wing
Trapezoidal arm outstanding, the centre on arm top are vertically equipped with threaded hole.The butterfly wing 4 be mounted on the inside of outer ring 1,
2 outside of inner ring, the upper end of 4 side arm of the butterfly wing are contacted with the bottom surface a or a ' of 1 high spot of outer ring, 1 convex center position of outer ring
The threaded hole at place is overlapped with the screw thread centerline hole on 4 arm of the butterfly wing, and the two is connected by screw.Another side arm of the butterfly wing 4
The upper end of wing is contacted with the bottom surface b or b ' of 2 high spot of inner ring, the threaded hole at 2 convex center position of inner ring and 4 arm of the butterfly wing
On threaded hole center line be overlapped, the two by screw be connected.
Shown in Figure 12 and 13: positioning annulus 3 is circular flake structure, is along the circumferential direction equipped with eight equidistant through-holes.
It is as shown in figure 14: piezoelectric stack 5 be cylindrical-shaped structure, the upper and lower ends of piezoelectric stack 5 respectively with two butterfly wings 4
Bottom surface contact, the center line of piezoelectric stack 5 is overlapped with the center of 4 bottom surface threaded hole of the butterfly wing.The upper and lower ends of piezoelectric stack 5
Respectively a piece conducting wire of connection, the other end of conducting wire are connect with electric energy storage device 6.
Conclusion: the driveline damping damping unit of the present invention based on piezoelectric stack can will be suffered by annular wall two sides
Radial force be converted into electric energy, thus up to the preferable effect for arriving vibration and noise reducing.
Copper, iron, aluminium etc. only have lesser interior damping and less consumption vibrational energy, after exciting force effect, have
Stronger noise results from component surface.Device in the present invention is by intrinsic " piezoelectric effect " characteristic of piezoelectric stack by machine
The mode that tool can be converted to electric energy consumes vibrational energy, and effect of vibration and noise reduction will be much better than the materials such as copper, iron, aluminium, and subtract
Vibration loss energy is converted into electric energy also recoverable while vibration, effectively raises the utilization rate of energy.The butterfly wing
It is the key that this invention with unique concave structure, when extruding of the annular wall inner side and outer side by radial force, passes through
The transmitting of the butterfly wing can squeeze piezoelectric stack on axial direction, with protection materials from potentially disruptive stretching and shearing force.When
Piezoelectric stack, which has, when for compressing works as with the comparable elasticity modulus of steel, fissipation factor with rubber phase.Piezoelectric stack is along its pole
Changing axis direction has high compression-strength.
Claims (6)
1. the driveline damping damping unit based on piezoelectric stack, it is characterised in that:
Outer ring (1) is cylinder barrel shaped, and there are multiple protrusions of circumference uniform distribution in inside；
Inner ring (2) is cylinder barrel shaped, and there are multiple protrusions of circumference uniform distribution in outside；
The butterfly wing (4), section are " V " shape, including with upper plane two-arm and with the middle part of lower plane；
Plane is connect with the raised bottom surface of outer ring (1) on (4) one side arm of the butterfly wing, and plane and inner ring (2) are convex on another side arm
Play bottom surface connection；
Piezoelectric stack (5) is clipped between two axially opposing butterfly wings (4), the both ends of piezoelectric stack (5) respectively with two butterflies
The middle part lower plane of wing (4) contacts；
Piezoelectric stack (5) is connected with energy collecting device (6) by conducting wire.
2. the driveline damping damping unit based on piezoelectric stack according to claim 1, it is characterised in that: protrusion and butterfly
The wing is connected by screw between (4)；It is connected by screw between the butterfly wing (4) and piezoelectric stack (5).
3. the driveline damping damping unit based on piezoelectric stack according to claim 1, it is characterised in that: outer ring (1) or
The structure axial symmetry of inner ring (2) and symmetrical above and below；The protrusion of outer ring (1) or inner ring (2) is 8, the centre bit of each protrusion
The place of setting is equipped with tapped through hole.
4. the driveline damping damping unit based on piezoelectric stack according to claim 2, it is characterised in that: positioning annulus
(3), it is circular flake structure, is above provided with the through-hole of circumference uniform distribution, number of openings is identical as the butterfly wing (4) quantity；Setting circle
Ring (3) passes through among the two-arm of each butterfly wing (4), and screw passes through the through-hole connection butterfly wing (4) and piezoelectric stack (5).
5. the driveline damping damping unit based on piezoelectric stack according to claim 1, it is characterised in that: the butterfly wing (4)
Arm is trapezoidal.
6. the driveline damping damping unit based on piezoelectric stack according to claim 1, it is characterised in that: the energy is received
Acquisition means (6) are battery or capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910114925.1A CN109707783A (en) | 2019-02-14 | 2019-02-14 | Driveline damping damping unit based on piezoelectric stack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910114925.1A CN109707783A (en) | 2019-02-14 | 2019-02-14 | Driveline damping damping unit based on piezoelectric stack |
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| CN109707783A true CN109707783A (en) | 2019-05-03 |
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| CN201910114925.1A Pending CN109707783A (en) | 2019-02-14 | 2019-02-14 | Driveline damping damping unit based on piezoelectric stack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805636A (en) * | 2019-10-16 | 2020-02-18 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
| CN111717406A (en) * | 2020-06-17 | 2020-09-29 | 中国人民解放军陆军工程大学 | Unmanned aerial vehicle image acquisition system |
| CN116906498A (en) * | 2023-09-14 | 2023-10-20 | 常熟理工学院 | Piezoelectric shunt-dry friction damper with adjustable damping |
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| CN106320099A (en) * | 2016-10-13 | 2017-01-11 | 长安大学 | Energy-storing and shock-absorbing type power generation device for subway train rails |
| CN108119603A (en) * | 2017-12-07 | 2018-06-05 | 南京航空航天大学 | A kind of vibration damping loop device based on piezo-electric stack |
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2019
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000136845A (en) * | 1998-10-30 | 2000-05-16 | Canon Inc | Active vibration insulating device and exposure device using it |
| CN204179967U (en) * | 2014-07-21 | 2015-02-25 | 浙江大学 | A kind of variable-air-gap formula magnetostriction vibrational energy collector |
| CN205423677U (en) * | 2015-12-03 | 2016-08-03 | 哈尔滨工程大学 | Main passive double -deck isolator based on piezoelectric stack |
| CN106100436A (en) * | 2016-06-24 | 2016-11-09 | 沈阳工业大学 | Nested type giant magnetostrictive actuator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805636A (en) * | 2019-10-16 | 2020-02-18 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
| CN111717406A (en) * | 2020-06-17 | 2020-09-29 | 中国人民解放军陆军工程大学 | Unmanned aerial vehicle image acquisition system |
| CN116906498A (en) * | 2023-09-14 | 2023-10-20 | 常熟理工学院 | Piezoelectric shunt-dry friction damper with adjustable damping |
| CN116906498B (en) * | 2023-09-14 | 2024-01-12 | 常熟理工学院 | Piezoelectric shunt-dry friction damper with adjustable damping |
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Application publication date: 20190503 |
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