CN2296934Y - Rotor vibration controlled combined adaptive damper - Google Patents
Rotor vibration controlled combined adaptive damper Download PDFInfo
- Publication number
- CN2296934Y CN2296934Y CN 97239434 CN97239434U CN2296934Y CN 2296934 Y CN2296934 Y CN 2296934Y CN 97239434 CN97239434 CN 97239434 CN 97239434 U CN97239434 U CN 97239434U CN 2296934 Y CN2296934 Y CN 2296934Y
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- CN
- China
- Prior art keywords
- rotating shaft
- damper
- vibration
- electro
- utility
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- Expired - Fee Related
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Abstract
The utility model relates to a rotor vibration controlled combined type self adaptive damper which is composed of the damper (1), a rotating shaft (2), cylindrical piezoelectric ceramics (3), two polyvinyl chloride cylinders (4), a conducting wire (5), etc., belonging to the field of mechanical engineering. The utility model is mainly used for reducing the vibration of the rotating shaft of machinery, and uses the voltage produced by the force of the rotating shaft acted on the piezoelectric ceramic because of vibration to excite electro-rheological fluid in the damper, causing the electro-rheological fluid to be solidified to achieve the purpose of vibration damping. Compared with the original damper, the utility model has no need of extra high voltage power supply and a control system, and has the advantages of light weight, small size, electricity saving, high safety and self adaptation.
Description
The utility model belongs to mechanical engineering field.
Mechanical rotor can vibrate in rotation process, and rotor oscillation meeting wearing and tearing mechanical parts shorten part life, influence machining accuracy etc.Thereby people manage to eliminate or weaken rotor oscillation always.
Nikolaisen
[1]ACTIVE CONTROL Deng the electrorheological fluid technology being applied to rotor oscillation has designed a kind of electro-rheological fluid damper of controlling rotor oscillation.Its structure as shown in Figure 1, wherein: a, shell; B, disc; C, mouse cage; D, bearing; E, rotating shaft; F, current liquid; G, high-voltage power; H, control system.
Current liquid (f) is to be scattered in a class suspension that forms in the insulating oil (as silicone oil) of low-k by size at the solid particle (as silica) of the high-k of 0.1～100 μ m.When applying direct current or AC field in suspension, the discrete particles in the suspension is arranged along direction of an electric field, forms chain structure, and notable change can take place its rheological properties, and apparent viscosity increases several magnitude during than added electric field not.When electric field strength reaches a certain adjacent dividing value (about 10
3V/mm) time, even become solid shape structure.This variation completely reversibility, also very fast, after the electric field cancellation, only need the Millisecond time, just can return to original liquid condition
[2]Thereby can change the shear strength of fluid rapidly, thereby make the damping of electro-rheological fluid damper and rigidity produce continuous variation fast by changing extra electric field.
Need plus high-pressure power supply (g) and control mechanism (h) during the electro-rheological fluid damper work of Nikolaisen design, control mechanism (h) is made up of monitor (as foil gauge etc.) and computer.Monitor arrives computer to detected rotating shaft (e) motion state information transmission, give plus high-pressure power supply (g) through sending instruction after the Computer Processing, control the viscosity that the electric field strength that is added on the current liquid (f) changes current liquid (f), thereby influence the support stiffness and the composed of external damping of rotating shaft (e), realize the control of countershaft (e) vibration.
Control rotating shaft (e) vibration preferably of the electro-rheological fluid damper of Nikolajse design.Its deficiency is that it needs plus high-pressure power supply and control system.This has brought many inconvenience for actual the use, and the expense costliness, belongs to control afterwards.
A kind of plus high-pressure power supply and control system of not needing is provided, and the damper with self adaption characteristics is a purpose of this utility model.
Structure of the present utility model as shown in Figure 2, wherein: 1, electro-rheological fluid damper; 2, rotating shaft; 3, piezoelectric constant; 4, PVC cylinder (two); 5, lead; 6, the pole plate of electrorheological fluid.Piezoelectric constant (3) is for thin cylindric, its inside and outside wall and two PVC cylinders (4) good combination, and be fixed together with the fixed in space thing.Lead (5) is connected (3) two pole plates of piezoelectric constant with two pole plates of electrorheological fluid (6) in the electro-rheological fluid damper (1).The diameter of the PVC cylinder (4) of internal layer is a bit larger tham the diameter of rotating shaft (2).The PVC cylinder (4) of internal layer is passed in rotating shaft (2).
Piezoelectric constant (3) is the PBaS-4 series piezoceramic material that adopts Shandong Zibo radio factory to produce, and its dynamo-electric lotus root syzygy is counted K
33(=0.7) is big, piezoelectric modulus D
33(＞350 * 10
-12C/N), g
33(=25 * 10
-3Vm/N) height, insulation resistance is big, mechanical strength height, pressurization back stable performance repeatedly.Be shaped as cylindricly, when it is imposed radial pressure, between its two pole plates of inside and outside wall, produce high voltage.
Characteristics of the present utility model: make piezoelectric constant (3) produce high voltage to piezoelectric constant (3) applied pressure when utilizing rotating shaft (2) vibration, and then the electrorheological fluid in the electro-rheological fluid damper (1) is solidified, reach the purpose of control rotating shaft (2) vibration.
In conjunction with Fig. 1, Fig. 2 working procedure of the present utility model and effect are described as follows:
1) mechanical rotating shaft (2) if vibration takes place in rotation process and its amplitude greater than between the PVC cylinder (4) of rotating shaft (2) and internal layer apart from the time, mechanical rotating shaft (2) will push piezoelectric constant (3), make it to produce voltage, this voltage can be added in by lead (5) on two pole plates (6) of the electrorheological fluid in the electro-rheological fluid damper (1), electrorheological fluid is solidified, change the viscosity of current liquid, thereby influence the support stiffness and the composed of external damping of rotating shaft (2), realize the control of countershaft (2) vibration.Experiment shows: rotating shaft (2) amplitude is bigger, and the voltage that piezoelectric constant (3) produces is high more, and the electric field that is added on the electrorheological fluid is bigger, and countershaft (2) vibration control effect is strong more.
2) if do not take place vibration or rotating shaft (2) amplitude less than between the PVC cylinder (4) of rotating shaft (2) and internal layer apart from the time, just can not push piezoelectric constant (3), electro-rheological fluid damper (1) countershaft (2) rotates not have to be influenced.
The utility model becomes damper with primary current to be compared, and it does not need plus high-pressure power supply and control system, body Long-pending little, weight is light, power saving, and safety, convenient, economy has the characteristics of self adaptation, is real-time control.
Reference [1] .J.L.Nikolajsen, M, S.Hoque, An electroviscous damper forrotor applicationsTrans.ASME, Vol.112,1990, pp.440-443.[2] Yao Guozhi, Meng Guang, the side together, " performance of electrorheological fluid and application study thereof ", " Proceedings of Mechanics " 26 (4), (1996).
Claims (1)
1. the combined type self-adaptive damper of a rotor oscillation control is made up of electro-rheological fluid damper (1), rotating shaft (2), piezoelectric constant (3), PVC cylinder (4), lead (5).Piezoelectric constant (3) is for thin cylindric, its inside and outside wall and two PVC cylinders (4) good combination, and be fixed together with the fixed in space thing.Lead (5) is connected (3) two pole plates of piezoelectric constant with two pole plates of electrorheological fluid (6) in the electro-rheological fluid damper (1).The diameter of the PVC cylinder (4) of internal layer is a bit larger tham the diameter of rotating shaft (2).The PVC cylinder (4) of internal layer is passed in rotating shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97239434 CN2296934Y (en) | 1997-04-04 | 1997-04-04 | Rotor vibration controlled combined adaptive damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97239434 CN2296934Y (en) | 1997-04-04 | 1997-04-04 | Rotor vibration controlled combined adaptive damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2296934Y true CN2296934Y (en) | 1998-11-11 |
Family
ID=33949431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97239434 Expired - Fee Related CN2296934Y (en) | 1997-04-04 | 1997-04-04 | Rotor vibration controlled combined adaptive damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2296934Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438823A (en) * | 2016-11-08 | 2017-02-22 | 安徽理工大学 | Self-power electrorheological fluid damping vibration isolator |
-
1997
- 1997-04-04 CN CN 97239434 patent/CN2296934Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438823A (en) * | 2016-11-08 | 2017-02-22 | 安徽理工大学 | Self-power electrorheological fluid damping vibration isolator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |