Design of a frictionless magnetorheological damper with a high dynamic force range

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Date
2019-03-19
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Mark
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SAGE
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Abstract
This article discusses an increase in dynamic force range in a spring-damper unit achieved by elimination of sealings´ friction. This friction is a part of damping force that cannot be controlled; therefore, it is undesirable in magnetorheological dampers. A new design of a magnetrheological damper with no friction force is descrbed and compared with a traditional magnetorheological damper consisting of a piston and piston rod seals. In the traditional design, fluid is forced to flow by a hydraulic cylinder with high friction caused by sealings. In order to eliminate this friction, a frictionless unit made of metal bellows was designed. Elastic metal bellows can be sealed only by static seals. The measurement of force-velocity dependency was carried out for the original and the new damper with the same magnetorheological valve. The results indicate that the frictionless unit exhibits a significant improvement in the dynamic force range. In the case of adaptive-passive damping control, the increase in the dynamic force range enables the improvement of vibration elimination in the entire frequency range.
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Advances in Mechanical Engineering. 2019, vol. 11, issue 3, p. 1-8.
https://doi.org/10.1177/1687814019827440
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Peer-reviewed
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en
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Creative Commons Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
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