CN109578503A - Forked type piezo-electric stack damping ring - Google Patents
Forked type piezo-electric stack damping ring Download PDFInfo
- Publication number
- CN109578503A CN109578503A CN201811511963.2A CN201811511963A CN109578503A CN 109578503 A CN109578503 A CN 109578503A CN 201811511963 A CN201811511963 A CN 201811511963A CN 109578503 A CN109578503 A CN 109578503A
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- China
- Prior art keywords
- piezo
- protecting frame
- forked type
- electric stack
- type protecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000013016 damping Methods 0.000 title claims abstract description 30
- 230000010287 polarization Effects 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Abstract
The present invention provides a kind of forked type piezo-electric stack damping rings, including piezo-electric stack, forked type protecting frame, outer ring and external shunt circuit, and wherein forked type protecting frame covers on bearing, are cased with outer ring outside forked type protecting frame, outer ring lock ring is on forked type protecting frame；The forked type protecting frame is the symmetrical ring structure that a kind of section is " recessed " type; several piezo-electric stacks are distributed between the inner and outer wall of " recessed " type structure recess; the both ends of the surface of each piezo-electric stack are sticked to respectively on the inner and outer wall of recess, and it is identical that the polarization direction of piezo-electric stack with forked type protecting frame receives bearing pressure loading direction；External circuits, series resistance and inductance are accessed after all piezo-electric stacks are in parallel.The present invention can use Piezoelectric Shunt Damping System technology and the vibration that transmission system is transmitted to bearing by axis and bearing be effectively reduced, and it is possible to prevente effectively from piezo-electric stack receiving tangential stress and torque, increase the service life of piezo-electric stack.
Description
Technical field
The present invention relates to vibration absorber field, aviation field rotor-support-foundation system middle (center) bearing and bearing block or machinery are acted on
On cabinet, specifically a kind of forked type piezo-electric stack damping ring.
Background technique
Traditional vibration absorber acted on bearing and bearing block has squeeze film damper etc..Squeeze film damper
Whether it is divided into band centering elastic bearing with one heart when rotor does not rotate by its journal centre and bearing centre and without centering elasticity
The squeeze film damper of bearing is the squeeze film damper structure diagram with elastic bearing as shown in Figure 1.Squeeze film resistance
Vibration energy absorption is become thermal energy and taken away by lubricating oil by Buddhist nun's device, is transmitted outward to when reducing critical rotor speed and via bearing
Vibration, effect is very significant.The advantages that squeeze film damper has that structure is simple, light-weight, small in size, good damping result.
But due to the nonlinearity of oil film rigidity may cause squeeze film damper during the work time lock, bistable state and
Non-coordinating precession phenomenon, driveline vibrations are excessive or even generate fatigue and collision.
The technology of the device discusses bibliography are as follows: Zhang Jiazhong, Zheng Tiesheng, Liu Shixue wait squeeze film damper-cunning
Dynamic bearing-stiff transmission stability and forked tunnel applied mechanics journal, 1996,13 (4): 35 ~ 40.
Always subtract as shown in Fig. 2, piezo-electric stack is mounted on bearing diameter by the researchers such as Atzrodt, Mayer, Melz
The vibration of small transmission shaft transmitting.It is converted into electric energy using the vibrational energy that Piezoelectric Shunt Damping System technology can pass out bearing,
Electric energy can be dissipated by Shunt Damping System circuit, to play damping effect.But piezoelectric pile is by shearing force and torque
When be easily broken.So the environmental suitability of the device is poor, service life in the case where rotor-support-foundation system high speed rotation
It is shorter.And the device needs for piezoelectric pile to be embedded in cabinet, and processing not easy to install for general engineering structure.
The technology of the device discusses bibliography are as follows: Atzrodt H, Mayer D, Melz T. Reduction of
Bearing Vibrations with Shunt Damping. 16th International Congress on Sound
and Vibration. 2009: 2383-2389。
Summary of the invention
The present invention in order to solve problems in the prior art, provides a kind of forked type piezo-electric stack damping ring, can use pressure
The vibration that transmission system is transmitted to bearing by axis and bearing is effectively reduced in electric Shunt Damping System technology, and it is possible to prevente effectively from piezoelectricity
It stacks and bears tangential stress and torque, increase the service life of piezo-electric stack.
The present invention includes piezo-electric stack, forked type protecting frame, outer ring and external shunt circuit, and wherein forked type protecting frame is covered in axis
It holds, is cased with outer ring outside forked type protecting frame, outer ring lock ring is on forked type protecting frame；The forked type protecting frame is that a kind of section is
The symmetrical ring structure of " recessed " type, between the inner and outer wall of " recessed " type structure recess in several piezo-electric stacks are distributed with, each
The both ends of the surface of piezo-electric stack are sticked to respectively on the inner and outer wall of recess, and polarization direction and the forked type protecting frame of piezo-electric stack receive
Bearing pressure loading direction is identical, when the inside and outside wall somewhere of recess, which receives pressure, shortens radial spacing, " recessed " type structure
Bending degree increase, compression piezoelectric ceramics up and down two end faces, so that the radial force that damping ring is subject to is converted into piezoelectric pile
The pressure of folded polarization direction；External circuits, series resistance and inductance are accessed after all piezo-electric stacks are in parallel.
The beneficial effects of the invention are that:
1, the sinusoidal excitation for applying vertical direction on the axis connected with bearing, is calculated by MATLAB numerical simulation, is obtained
The transmissibility of system in the case where connecting external circuitry in frequency domain and being not connected to external circuits.When connection external circuits
Afterwards, this damping ring has apparent effectiveness in vibration suppression in direction transmissibility peak-fall 60%.
2, symmetrical in bearing sagittal plane since damping ring is cyclic structure, so when radially flat by other
Effectiveness in vibration suppression can be equally played when excitation in face.
3, the passive control technology based on Piezoelectric Shunt Damping System technology has very high robustness, and is swift in response.
4, the device do not need be similar to active control system in power amplifier and external power supply, reduce volume and
Weight facilitates installation and maintenance.
Detailed description of the invention
Fig. 1 is squeeze film damper structure diagram.
Fig. 2 is piezo-electric stack vibration absorber schematic diagram.
Fig. 3 is damping ring scheme of installation.
Fig. 4 is Systems Theory model schematic.
Fig. 5 is transmissibility numerical analysis schematic diagram.
Fig. 6 is piezoelectric pile schematic diagram
Fig. 7 is damping ring forked type protecting frame schematic diagram.
Fig. 8 is damping ring schematic diagram.
Fig. 9 is outer ring schematic diagram.
Figure 10 is piezo-electric stack external circuits schematic diagram.
Figure 11 is damping ring operation principle schematic diagram.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
The present invention is mounted on bearing and bearing in rotor-support-foundation system, between the structures such as gear and axis, as shown in Figure 3.Mainly
For reducing because to the power output of bearing caused by vibration, to reduce integrally-built vibratory response.The forked type of damping ring
Protecting frame can protect piezo-electric stack from the destruction of tangential force and torque, promote the service life and stability of piezo-electric stack.
Structure of the invention as shown in figure 8, include piezo-electric stack 1, forked type protecting frame 2, outer ring 3 and external shunt circuit 5,
2 sets of middle forked type protecting frame is cased with outer ring 3 outside forked type protecting frame 2,3 lock ring of outer ring is on forked type protecting frame 2, outer ring on bearing 4
3 as shown in Figure 9；As seen in figs. 7 and 11, forked type protecting frame 2 is that a kind of section is the symmetrical of " recessed " type to the forked type protecting frame 2
Ring structure, between the inner and outer wall of " recessed " type structure recess in several piezo-electric stacks 1 are distributed with, quantity is 8 in schematic diagram
It is a, greater number of piezo-electric stack can be installed according to actual needs.Piezo-electric stack as shown in fig. 6, each piezo-electric stack 1 both ends
Face is sticked to respectively on the inner and outer wall of recess, and the polarization direction and forked type protecting frame 2 of piezo-electric stack 1 receive 4 pressure of bearing load
Lotus direction is identical, when the inside and outside wall somewhere of recess, which receives pressure, shortens radial spacing, the bending degree of " recessed " type structure
Increase, two end faces above and below compression piezoelectric ceramics, so that the radial force that damping ring is subject to is converted into piezo-electric stack polarization direction
Pressure；External circuits 5, series resistance and inductance are accessed after all 1 parallel connections of piezo-electric stack, as shown in Figure 10.
The present invention is mounted between bearing outer wall and bearing inner wall, as shown in figure 3, forked type protecting frame plays clamping piezoelectric pile
It folds and protects piezo-electric stack not by the effect destroyed, as shown in figure 11.When vibration of rotor system, bearing transmits vibration force
Onto the inner wall of protecting frame, to generate a radial displacement between protecting frame inside and outside wall.When inside and outside wall somewhere radial spacing
When shortening, the bending degree of " recessed " type structure increases, two end faces above and below compression piezoelectric ceramics, thus the diameter that damping ring is subject to
The pressure of piezo-electric stack polarization direction is converted into power.By direct piezoelectric effect, the piezo-electric stack being under pressure produces on the electrode
Raw charge, then dissipated the electric energy of generation by shunt circuit.Under working condition, the piezo-electric stack in damping ring is only by pole
Change side upwards pressure, and avoids the tangential and torque as caused by bearing rotary.
Systems Theory model schematic as shown in figure 4, on the axis connected with bearing apply vertical direction sinusoidal excitation,
Calculated by MATLAB numerical simulation, obtain in frequency domain connect external circuitry and be not connected in the case where external circuits be
The transmissibility of system, transmissibility numerical analysis schematic diagram are as shown in Figure 5.After connecting external circuits, this damping ring is in the party
To transmissibility peak-fall 60%, there is apparent effectiveness in vibration suppression.It is radially flat in bearing since damping ring is cyclic structure
It is symmetrical in face, so can equally play effectiveness in vibration suppression when by excitation in other sagittal planes.
The sharpest edges of forked type protecting frame are exactly that can install the quantity of piezo-electric stack not limit excessively, can be according to reality
It needs to increase and decrease, and does not need the fasteners such as bolt screw.Passive control technology based on Piezoelectric Shunt Damping System technology has very high
Robustness, and be swift in response.The device does not need the power amplifier and external power supply being similar in active control system, subtracts
Lack volume and weight, facilitates installation and maintenance.
Mounting means of the present invention is as follows:
According to bearing size according to, by each component processing, wherein forked type protecting frame needs to be added by 3D printing shown in schematic diagram
Work.Each component is assembled, detailed process is as follows: piezo-electric stack both ends of the surface are sticked on the annular platform of protecting frame, installed
It needs to strut forked type protecting frame to facilitate and be put into piezo-electric stack in the process.Outer ring heating is made into its diameter change, is nested into
On forked type protecting frame, lock ring is on protecting frame after cooling.Then piezo-electric stack is connected into external circuits, series resistance and inductance.
So far damping ring is completed, and by it on bearing, can be started to work.
There are many concrete application approach of the present invention, the above is only a preferred embodiment of the present invention, it is noted that for
For those skilled in the art, without departing from the principle of the present invention, it can also make several improvements, this
A little improve also should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of forked type piezo-electric stack damping ring, it is characterised in that: including piezo-electric stack (1), forked type protecting frame (2), outer ring (3)
With external shunt circuit (5), wherein forked type protecting frame (2) covers on bearing (4), is cased with outer ring (3) outside forked type protecting frame (2),
Outer ring (3) lock ring is on forked type protecting frame (2)；The forked type protecting frame (2) is the symmetrical ring junction that a kind of section is " recessed " type
Structure, between the inner and outer wall of " recessed " type structure recess in be distributed with several piezo-electric stacks (1), the two of each piezo-electric stack (1)
End face is sticked to respectively on the inner and outer wall of recess, and the polarization direction of piezo-electric stack (1) and forked type protecting frame (2) receive bearing
(4) pressure loading direction is identical, when the inside and outside wall somewhere of recess, which receives pressure, shortens radial spacing, " recessed " type structure
Bending degree increases, two end faces above and below compression piezoelectric ceramics, so that the radial force that damping ring is subject to is converted into piezo-electric stack
The pressure of polarization direction；External circuits (5) are accessed after all piezo-electric stacks (1) are in parallel, series resistance and inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811511963.2A CN109578503B (en) | 2018-12-11 | 2018-12-11 | Fork-type piezoelectric stack vibration damping ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811511963.2A CN109578503B (en) | 2018-12-11 | 2018-12-11 | Fork-type piezoelectric stack vibration damping ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109578503A true CN109578503A (en) | 2019-04-05 |
| CN109578503B CN109578503B (en) | 2024-02-13 |
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ID=65929637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811511963.2A Active CN109578503B (en) | 2018-12-11 | 2018-12-11 | Fork-type piezoelectric stack vibration damping ring |
Country Status (1)
| Country | Link |
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| CN (1) | CN109578503B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454538A (en) * | 2019-07-05 | 2019-11-15 | 同济大学 | A kind of combined type nesting piezo-electric damping device for floatation type offshore wind generating |
| CN110805636A (en) * | 2019-10-16 | 2020-02-18 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
| CN112762139A (en) * | 2020-12-31 | 2021-05-07 | 苏州大学 | Two-degree-of-freedom rotation adjusting device and active vibration suppression control method thereof |
| CN113531041A (en) * | 2021-07-30 | 2021-10-22 | 山东大学 | Stacked piezoelectric ceramic vibration damping ring |
| CN114412953A (en) * | 2021-12-24 | 2022-04-29 | 南京航空航天大学 | Helicopter rotor piezoelectric film vibration suppression structure and method based on passive control |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038029A (en) * | 1996-07-26 | 1998-02-13 | Ebara Corp | Dick shape structure with vibration damping function |
| CN104564798A (en) * | 2013-10-14 | 2015-04-29 | 航空技术空间股份有限公司 | Piezoelectric damper system for an axial turbomachine rotor |
| CN105927708A (en) * | 2016-03-24 | 2016-09-07 | 南京航空航天大学 | Rigidity and damping adjustable active vibration reduction support |
| CN209925503U (en) * | 2018-12-11 | 2020-01-10 | 南京航空航天大学 | Fork type piezoelectric stack vibration damping ring |
-
2018
- 2018-12-11 CN CN201811511963.2A patent/CN109578503B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038029A (en) * | 1996-07-26 | 1998-02-13 | Ebara Corp | Dick shape structure with vibration damping function |
| CN104564798A (en) * | 2013-10-14 | 2015-04-29 | 航空技术空间股份有限公司 | Piezoelectric damper system for an axial turbomachine rotor |
| CN105927708A (en) * | 2016-03-24 | 2016-09-07 | 南京航空航天大学 | Rigidity and damping adjustable active vibration reduction support |
| CN209925503U (en) * | 2018-12-11 | 2020-01-10 | 南京航空航天大学 | Fork type piezoelectric stack vibration damping ring |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454538A (en) * | 2019-07-05 | 2019-11-15 | 同济大学 | A kind of combined type nesting piezo-electric damping device for floatation type offshore wind generating |
| CN110454538B (en) * | 2019-07-05 | 2020-11-27 | 同济大学 | Composite nested piezodamper for floating offshore wind driven generator |
| CN110805636A (en) * | 2019-10-16 | 2020-02-18 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
| CN112762139A (en) * | 2020-12-31 | 2021-05-07 | 苏州大学 | Two-degree-of-freedom rotation adjusting device and active vibration suppression control method thereof |
| CN112762139B (en) * | 2020-12-31 | 2022-09-27 | 苏州大学 | Two-degree-of-freedom rotation adjusting device and active vibration suppression control method thereof |
| CN113531041A (en) * | 2021-07-30 | 2021-10-22 | 山东大学 | Stacked piezoelectric ceramic vibration damping ring |
| CN113531041B (en) * | 2021-07-30 | 2022-06-28 | 山东大学 | Stacked piezoelectric ceramic vibration damping ring |
| CN114412953A (en) * | 2021-12-24 | 2022-04-29 | 南京航空航天大学 | Helicopter rotor piezoelectric film vibration suppression structure and method based on passive control |
| CN114412953B (en) * | 2021-12-24 | 2022-11-25 | 南京航空航天大学 | Helicopter rotor piezoelectric film vibration suppression structure and method based on passive control |
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| Publication number | Publication date |
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| CN109578503B (en) | 2024-02-13 |
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