Investigation about Electrorheological Squeeze Film Damper Applied to Active Control of Rotor Dynamic
Electrorheological (ER) fluids, discovered in 1947 by W. WINSLOW, are concentrated suspensions of solid particles in an oily base liquid. Exposed to a strong electric field, their resistance to flow increases very greatly and this change is progressive, reversible and occurs very rapidly. Nowadays,...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1997-01-01
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| Series: | International Journal of Rotating Machinery |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1023621X97000067 |
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| Summary: | Electrorheological (ER) fluids, discovered in 1947 by W. WINSLOW, are concentrated suspensions
of solid particles in an oily base liquid. Exposed to a strong electric field, their
resistance to flow increases very greatly and this change is progressive, reversible and occurs
very rapidly. Nowadays, ER fluids, made of lithium salt and fluorosilicon got rid of their old
abrasive characteristics and are able to provide a good interface between electronics and
mechanical components. A bibliographical study on ER fluids and ER technology has been
carried out. The aim of this study is adapting ER technology to Squeeze Film Damper. In
order to provide an active control on a flexible rotating shaft so as to command the whole
shaft/bearings device in case of high rotating speed or heavy load trouble. Results of numerical
computation of a shaft bearing assembly with a Squeeze Film Damper using negative
ER fluid are showed in order to see the possibility of avoiding critical speeds by natural
frequency shifting. A technical study of ER Squeeze Film Damper design is also presented,
taking into account ER fluid properties and ER technology requirements. |
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| ISSN: | 1023-621X |