CN109538683A - The damping ring stacked based on annular piezoelectric - Google Patents
The damping ring stacked based on annular piezoelectric Download PDFInfo
- Publication number
- CN109538683A CN109538683A CN201811511947.3A CN201811511947A CN109538683A CN 109538683 A CN109538683 A CN 109538683A CN 201811511947 A CN201811511947 A CN 201811511947A CN 109538683 A CN109538683 A CN 109538683A
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- Prior art keywords
- annular piezoelectric
- bearing
- protecting frame
- ring
- piezoelectric
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- 238000013016 damping Methods 0.000 title claims abstract description 28
- 238000007363 ring formation reaction Methods 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 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
- 230000004044 response Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010008 shearing 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
- F16F15/02—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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention provides a kind of damping rings stacked based on annular piezoelectric; including annular piezoelectric stacking, protecting frame and external shunt circuit; wherein protecting frame is the ring assembling structure covered on bearing; protecting frame is composed of upper and lower two U-shaped shield frames; the U-type groove combination cyclization dress empty slot of two U-shaped shield frames; annular piezoelectric stacking is installed, annular piezoelectric stacks access external circuits, series resistance and inductance in ring dress empty slot.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 damping ring stacked based on annular piezoelectric.
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 damping ring stacked based on annular piezoelectric, can be with
The vibration that transmission system is transmitted to by axis and bearing bearing is effectively reduced using Piezoelectric Shunt Damping System technology, and can effectively keep away
Exempt from piezo-electric stack and bear tangential stress and torque, increases the service life of piezo-electric stack.
The present invention includes annular piezoelectric stacking, protecting frame and external shunt circuit, and wherein protecting frame is to cover on bearing
Ring assembling structure, protecting frame are composed of upper and lower two U-shaped shield frames, the U-type groove combination cyclization dress empty slot of two U-shaped shield frames, ring
Annular piezoelectric stacking is installed, annular piezoelectric stacks access external circuits, series resistance and inductance in dress empty slot.
Bolt mounting holes are provided on the U-shaped shield frame of described two, the bolt mounting holes between two U-shaped shield frames pass through bolt
It is fixed.
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 by other sagittal planes
Excitation when can equally play effectiveness in vibration suppression.
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 annular piezoelectric heap schematic diagram
Fig. 7 is damping ring protecting frame schematic diagram.
Fig. 8 is damping ring schematic diagram.
Fig. 9 is damping ring cross-sectional view.
Figure 10 is that annular piezoelectric stacks connection circuit 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 that annular piezoelectric stacks (1), protecting frame (2) and external shunt circuit (5),
Middle protecting frame (2) is the ring assembling structure covered on bearing (4), as shown in fig. 7, protecting frame (2) is combined by upper and lower two U-shaped shield frames
It forms, as shown in figure 9, the U-type groove combination cyclization dress empty slot of two U-shaped shield frames, ring, which fills, is equipped with annular piezoelectric stacking in empty slot
(1), as shown in fig. 6, annular piezoelectric stacks (1) access external circuits (5), series resistance and inductance, as shown in Figure 10.
Bolt mounting holes are provided on the U-shaped shield frame of described two, the bolt mounting holes between two U-shaped shield frames pass through bolt
It is fixed.
U-shaped protecting frame plays the role of gripping ring-like piezo-electric stack and piezo-electric stack is protected to be destroyed.When bearing occurs
Protecting frame can be squeezed when vibration, what protection mount structure had an effect converts load to the pressure being applied in piezoelectric pile polarization direction
Power.After connecting external circuits, piezo-electric stack can be converted mechanical energy by piezoelectric effect in polarization direction by external force
For electric energy, thus by external circuits by power consumption.The piezo-electric stack of external circuits is connected under stress, its own is just
Degree and damping characteristic can also change.The radial vibration power so transmitted outward by bearing is converted to by U-shaped protecting frame
To the pressure of piezoelectric pile, then mechanical energy is converted using Piezoelectric Shunt Damping System technology in branch circuit series resistance and inductance
It for electric energy and dissipates, has the function that reduce vibration.
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.
Passive control technology based on Piezoelectric Shunt Damping System technology has very high robustness, and is swift in response.The device
Do not need be similar to active control system in power amplifier and external power supply, reduce volume and weight, facilitate installation and
Maintenance.
Mounting means of the present invention is as follows:
According to bearing size according to shown in schematic diagram by each component processing, wherein U-shaped protecting frame needs to be added by 3D printing
Work.Each component is assembled, detailed process is as follows: being directed at the groove of U-shaped protecting frame, two U-shaped protecting frames are mounted on ring
The upper and lower end face of shape piezo-electric stack.Only loose bolt is mounted in the through-hole of U-shaped protecting frame and is fastened, annular piezoelectric is stacked
It is compacted.Then piezo-electric stack is connected into external circuits, series resistance and inductance.So far damping ring is completed, and is mounted in
On bearing, it can start 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 (2)
1. it is a kind of based on annular piezoelectric stack damping ring, it is characterised in that: including annular piezoelectric stack (1), protecting frame (2) and
External shunt circuit (5), wherein protecting frame (2) is the ring assembling structure covered on bearing (4), and protecting frame (2) is U-shaped by upper and lower two
Shield frame is composed, the U-type groove combination cyclization dress empty slot of two U-shaped shield frames, is equipped with annular piezoelectric stacking in ring dress empty slot
(1), annular piezoelectric stacks (1) access external circuits (5), series resistance and inductance.
2. the damping ring according to claim 1 stacked based on annular piezoelectric, it is characterised in that: two U-shaped shields
Bolt mounting holes are provided on frame, the bolt mounting holes between two U-shaped shield frames are bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811511947.3A CN109538683A (en) | 2018-12-11 | 2018-12-11 | The damping ring stacked based on annular piezoelectric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811511947.3A CN109538683A (en) | 2018-12-11 | 2018-12-11 | The damping ring stacked based on annular piezoelectric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109538683A true CN109538683A (en) | 2019-03-29 |
Family
ID=65854263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811511947.3A Withdrawn CN109538683A (en) | 2018-12-11 | 2018-12-11 | The damping ring stacked based on annular piezoelectric |
Country Status (1)
| Country | Link |
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| CN (1) | CN109538683A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567054A (en) * | 2019-09-02 | 2019-12-13 | 珠海格力电器股份有限公司 | Vibration adjusting assembly, compressor vibration reducing structure and air conditioner |
| CN110805636A (en) * | 2019-10-16 | 2020-02-18 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
-
2018
- 2018-12-11 CN CN201811511947.3A patent/CN109538683A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567054A (en) * | 2019-09-02 | 2019-12-13 | 珠海格力电器股份有限公司 | Vibration adjusting assembly, compressor vibration reducing structure and air conditioner |
| CN110805636A (en) * | 2019-10-16 | 2020-02-18 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
| CN110805636B (en) * | 2019-10-16 | 2021-11-05 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190329 |
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| WW01 | Invention patent application withdrawn after publication |