CN1492161A - Self coupling electric rheological liquid damper without external power - Google Patents
Self coupling electric rheological liquid damper without external power Download PDFInfo
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- CN1492161A CN1492161A CNA021394768A CN02139476A CN1492161A CN 1492161 A CN1492161 A CN 1492161A CN A021394768 A CNA021394768 A CN A021394768A CN 02139476 A CN02139476 A CN 02139476A CN 1492161 A CN1492161 A CN 1492161A
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Abstract
The self-coupling electric rheological liquid damper without external power source consists of strained part, piezoelectric part, damping part separated from the piezoelectric part, electric part, packing part and other parts. When the piston rod is vibrated by outer force, the compression spring and the lower spring on the piston rod applies the external vibration to the piezoelectric ceramic, the voltage the piezoelectric ceramic produces is fed to across the inner and the outer electrode to reduce the vibration of the piston, increase the viscous force of the ER fluid and reduce the vibration of the piston. The greater the downward displacement of the piston, the higher the output voltage of the piezoelectric ceramic and the greater the resistance the ER fluid produces, reaching the aim of self-coupling system to reduce vibration. The present invention omits external power source and control system.
Description
Technical field the present invention relates to a kind of electrorheological fluid damping device, especially need not additional power source when work, and can be from the current liquescent damper of coupling certainly of dynamic response.
Background technique is owing to the shear strength of electrorheological fluid (being called for short the ER fluid) can be regulated by extra electric field, so many ER fluid dampers occurred.At present, current liquescent damper has two kinds of fundamental types: fixed electrode valve type and sliding electrode viscous type.In the fixed electrode type, because the electrorheological fluid effect makes and flows through interelectrode ER fluid and be obstructed, cause pressure to raise, produce resistance; In sliding electrode viscous type,, thereby stop interelectrode relative movement because the electrorheological fluid effect has increased the viscous force of ER fluid.Most ER fluid dampers need high-voltage power supply special of tyre to finish the liquid-solid transformation of fluid, and pass through the regulating and controlling of computer realization damping force, so cost is very high.Zhao Xiaopeng etc. have designed the self adaption ER fluid damper with the piezoelectric constant power supply in patent " self-adaptive damper that electrorheological fluid and piezoelectric constant are compound " (ZL 96216145.3), saved high-voltage power supply special, but, need more ER fluid because the ER fluid has been full of following spring-loaded cavity.The ER fluid of better performances costs an arm and a leg at present, so the cost of this damper is very high.In patent " self-adaptive damper of the wedge shape application of force " (ZL 96216424.6), owing to used labor-saving structure,, otherwise will damage piezoelectric constant so extraneous vibration power can not be excessive, adopt two piezoelectric constant power supplies in addition, power is a bit not enough.And a shortcoming is stroke little (it is big to be equivalent to rigidity) in addition.More than two kinds of dampers since shortcoming separately make to use to be subjected to certain restriction.
Summary of the invention the purpose of this invention is to provide a kind of current liquescent damper of coupling certainly that does not have external power, it with direct stressed, anti-extraneous vibration power (180～700N) big, stroke is big (10～18mm), rigidity is little and less (the characteristics such as 28～50ml) of required ER fluid.
Description of drawings
Fig. 1 is the main pseudosection of the current liquescent damper that is coupled certainly of the no external power of proposition according to the present invention.
Fig. 2 is the main pseudosection of damping inner core, left pseudosection and plan view.
Fig. 3 is the main pseudosection and the plan view of damping urceolus.
Fig. 4 is the three-view diagram of interior electrode.
Fig. 5 is the main pseudosection and the plan view of the top cover of damping tube.
Fig. 6 is an electrical connection diagram.
Fig. 7 is the cage plate plan view of three piezoelectric constant.
Among Fig. 1: 1. straight tube 12. upper springs of base 2. damping inner cores 3. damping urceolus 4.O RunddichtringOs 5. gasket seals 6. top cover 7.O RunddichtringOs 8. hexagon nuts 9. bolts 10. lower springs 11. 13. straight cover 14. piston rods 15. hexagon nuts 16. pressure spring plates 17. insulation boards 18. piezoelectric constant 19. joint sleeves 20. copper sheets 21. external electrodes 22. interior electrode 23. gasket seals 24. pistons 27. cage plate 28.ER fluids 29. leads
Among Fig. 6: 6. top cover 18. piezoelectric constant 20. copper sheets 25. screws 26. screws 29. leads
The object of the present invention is achieved like this for embodiment: structure of the present invention such as Fig. 1.It is by part of the force＜comprise piston rod (14), piston (24) etc. 〉, piezoelectric＜comprise upper spring (12), lower spring (10), pressure spring plate (16), piezoelectric constant (18) etc. 〉, damping portion＜comprise damping inner core (2), damping inner core (3), ER fluid (28) etc. 〉, electric connecting member＜comprise lead (29), screw (25,26), copper sheet (20) etc.〉and packed part＜comprise base (1), top cover (6), straight tube (11), straight cover (13)〉wait the part composition.Introduce respectively below:
Piston rod (14) is permanent the connection with piston (24).Piston rod (14) is connected with outer force application mechanism by the center hole of top cover (6) and the center hole of straight cover (13).Piston rod (14) is gone up by the pressure spring plate that has been threaded (16).Nut (15) is fixed pressure spring plate (16).
Spring (12) is placed between pressure spring plate (16) and the straight cover (13).Spring (10) is placed between pressure spring plate (16) and the insulation board (17).
Piezoelectric constant (18) and copper sheet, lead are placed between insulation board (17) and the top cover (6).The positive negative terminal of piezoelectric constant (18) is connected respectively on two brass screws (25,26) of top cover (6).Three piezoelectric constant (18) are placed on respectively in three holes of cage plate (27).
Structure such as Fig. 2 of damping inner core (2).Damping inner core (2) top is a boss.The boss outer rim cooperates with the inner cylindrical surface of external electrode (21).Boss cooperates with the inner cylindrical surface of interior electrode (22) with the external cylindrical surface of bottom.Each has beaten two apertures (φ 3～φ 8mm) in the top and the bottom of damping inner core (2), so that the ER fluid flows through.The hole of damping inner core (2) boss cooperates with the pillar of interior electrode (22).The inner cylindrical surface of damping inner core (2) cooperates with piston (24).
Be filled with ER fluid (28) in the damping inner core (2) and between the internal and external electrode (22,21).
Screw (25) stretches out top cover (6) downwards and contacts with the inner cylindrical surface of external electrode (21).Screw (26) stretches out top cover (6) downwards and contacts with the pillar of interior electrode (22).
The upper and lower end of the inside and outside tube of damping (2,3) has respectively been placed rubber sheet gasketing (5,23).
The working principle of damper is as follows: when external force was instigated piston rod (14), piston rod (14) moved together with pressure spring plate (16).Pressure spring plate (16) is exerted pressure to insulation board (17) and piezoelectric constant (18) by spring (10).The stressed back of piezoelectric constant (18) output voltage.The voltage of output is added on the inside and outside electrode (22,21) at last.After ER fluid (28) was subjected to the excitation of voltage between the inside and outside electrode (22,21), its shear strength raise.ER fluid (28) is under the thrust of piston (24), and the aperture below damping inner core (2) process flows between the internal and external electrode (22,21), goes into damping inner core (2) through top orifice flow then.Because the shear strength of ER fluid raises, thereby conversely piston (24) is produced resistance, and then reach the purpose of vibration damping.The downward displacement of piston (24) is big more, and the output voltage of piezoelectric constant (18) is just high more, and the resistance that ER fluid (28) produces is also just big more, has so just formed coupling certainly.
Claims (8)
1. current liquescent damper of coupling certainly that does not have external power, by part of the force＜comprise piston rod (14), piston (24) etc. 〉, piezoelectric＜comprise upper spring (12), lower spring (10), pressure spring plate (16), piezoelectric constant (18) etc. 〉, damping portion＜comprise damping inner core (2), damping inner core (3), ER fluid (28) etc. 〉, electric connecting member＜comprise lead (29), screw (25,26), copper sheet (20) etc.〉and packed part＜comprise base (1), top cover (6), straight tube (11), straight cover (13)〉wait the part composition, it is characterized in that: piezoelectric and damping portion separate, and electric connecting member is positioned in the damper the inside.
2. a kind of current liquescent damper of coupling certainly that does not have external power according to claim 1 is characterized in that piston rod (14) and permanent connection of piston (24).
3. a kind of current liquescent damper of coupling certainly that does not have external power according to claim 1, it is characterized in that a spring respectively being arranged up and down at pressure spring plate (16), the elasticity coefficient (being approximately 10N/mm) of upper spring (12) is less than the elasticity coefficient (being approximately 28N/mm) of lower spring (10), and lower spring (10) separates with insulation board (17) and piezoelectric constant (18).
4. a kind of current liquescent damper of coupling certainly that does not have external power according to claim 1, the number that it is characterized in that piezoelectric constant (18) is 3, and be fixed in the cage plate (27), piezoelectric constant (18) is parallel with one another, and the voltage of output is connected on interior electrode (22), the external electrode (21) through lead (29), screw (25,26).
5. a kind of current liquescent damper of coupling certainly that does not have external power according to claim 1, it is characterized in that the interior electrode (22) and the spacing of external electrode (21) are to control by the external diameter of interior electrode (22) and the internal diameter of external electrode (21), the spacing between interior electrode (22) and the external electrode (21) is 0.4～1mm.
6. a kind of current liquescent damper of coupling certainly that does not have external power according to claim 1 is characterized in that screw (25) stretches out top cover (6) and passes gasket seal (5) and contact with external electrode (21); Screw (26) stretches out top cover (6) and passes gasket seal (5) and contact with the pillar of interior electrode (22), and screw (25,26) is installed on the top cover (6), its diameter be in 3～middle 5mm.
7. a kind of current liquescent damper of coupling certainly that does not have external power according to claim 1, the pillar that it is characterized in that interior electrode (22) pierces in the aperture of damping inner core (2) boss, aperture on the aperture of damping inner core (2) and interior electrode (22) barrel is mutually to good, and the diameter of aperture is φ 3～φ 8mm.
8. a kind of current liquescent damper of coupling certainly that does not have external power according to claim 1 is characterized in that respectively having placed below top cover (6) and above the base (1) pad sealing together (5,23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02139476 CN1260495C (en) | 2002-10-21 | 2002-10-21 | Self coupling electric rheological liquid damper without external power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02139476 CN1260495C (en) | 2002-10-21 | 2002-10-21 | Self coupling electric rheological liquid damper without external power |
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| Publication Number | Publication Date |
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| CN1492161A true CN1492161A (en) | 2004-04-28 |
| CN1260495C CN1260495C (en) | 2006-06-21 |
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| CN 02139476 Expired - Fee Related CN1260495C (en) | 2002-10-21 | 2002-10-21 | Self coupling electric rheological liquid damper without external power |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107738A (en) * | 2009-12-23 | 2011-06-29 | 西北工业大学 | Flexible self-adaptive abutting device of orbital spacecraft |
| CN102128234A (en) * | 2011-03-09 | 2011-07-20 | 哈尔滨工程大学 | Hydraulic driving vibration isolator based on piezoelectric actuation |
| CN104455193A (en) * | 2014-09-29 | 2015-03-25 | 宁波鸿裕工业有限公司 | Piezoelectric type self-adaptive adjustment damping vibration absorber |
| CN106438823A (en) * | 2016-11-08 | 2017-02-22 | 安徽理工大学 | Self-power electrorheological fluid damping vibration isolator |
| CN109944896A (en) * | 2019-04-04 | 2019-06-28 | 四川大学 | A kind of self-adaptive current liquescent damper of self-induction power supply |
| CN110195760A (en) * | 2019-06-14 | 2019-09-03 | 四川大学 | A kind of novel piezo-electric ceramic and ER fluid are from coupling damper |
-
2002
- 2002-10-21 CN CN 02139476 patent/CN1260495C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107738A (en) * | 2009-12-23 | 2011-06-29 | 西北工业大学 | Flexible self-adaptive abutting device of orbital spacecraft |
| CN102128234A (en) * | 2011-03-09 | 2011-07-20 | 哈尔滨工程大学 | Hydraulic driving vibration isolator based on piezoelectric actuation |
| CN102128234B (en) * | 2011-03-09 | 2012-08-22 | 哈尔滨工程大学 | Hydraulic driving vibration isolator based on piezoelectric actuation |
| CN104455193A (en) * | 2014-09-29 | 2015-03-25 | 宁波鸿裕工业有限公司 | Piezoelectric type self-adaptive adjustment damping vibration absorber |
| CN106438823A (en) * | 2016-11-08 | 2017-02-22 | 安徽理工大学 | Self-power electrorheological fluid damping vibration isolator |
| CN109944896A (en) * | 2019-04-04 | 2019-06-28 | 四川大学 | A kind of self-adaptive current liquescent damper of self-induction power supply |
| CN110195760A (en) * | 2019-06-14 | 2019-09-03 | 四川大学 | A kind of novel piezo-electric ceramic and ER fluid are from coupling damper |
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| Publication number | Publication date |
|---|---|
| CN1260495C (en) | 2006-06-21 |
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