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ŽÁČEK, J. JANUSZ, G. SAPINSKI, B. SEDLAČÍK, M. STRECKER, Z. KUBÍK, M.
Original Title
Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves
Type
journal article in Web of Science
Language
English
Original Abstract
Magnetorheological (MR) fluids have been known to react to magnetic fields of sufficient magnitudes. While in the presence of the field, the material develops a yield stress. The tunable property has made it attractive in, e.g., semi-active damper applications in the vibration control domain in particular. Within the context of a given application, MR fluids can be exploited in at least one of the fundamental operating modes (flow, shear, squeeze, or gradient pinch mode) of which the gradient pinch mode has been the least explored. Contrary to the other operating modes, the MR fluid volume in the flow channel is exposed to a non-uniform magnetic field in such a way that a Venturi-like contraction is developed in a flow channel solely by means of a solidified material in the regions near the walls rather than the mechanically driven changes in the channel’s geometry. The pinch-mode rheology of the material has made it a potential candidate for developing a new category of MR valves. By convention, a pinch-mode valve features a single flow channel with poles over which a non-uniform magnetic field is induced. In this study, the authors examine ways of extending the dynamic range of pinch-mode valves by employing a number of such arrangements (stages) in series. To accomplish this, the authors developed a prototype of a multi-stage (three-stage) valve, and then compared its performance against that of a single-stage valve across a wide range of hydraulic and magnetic stimuli. To summarize, improvements of the pinch-mode valve dynamic range are evident; however, at the same time, it is hampered by the presence of serial air gaps in the flow channel.
Keywords
magnetorheological fluid; gradient pinch mode; valve; dynamic range
Authors
ŽÁČEK, J.; JANUSZ, G.; SAPINSKI, B.; SEDLAČÍK, M.; STRECKER, Z.; KUBÍK, M.
Released
4. 12. 2023
Publisher
MDPI
Location
Switzerland
ISBN
2076-0825
Periodical
Actuators
Year of study
12
Number
State
Swiss Confederation
Pages from
1
Pages to
14
Pages count
URL
https://www.mdpi.com/2076-0825/12/12/449
Full text in the Digital Library
http://hdl.handle.net/11012/245191
BibTex
@article{BUT185671, author="Jiří {Žáček} and Janusz {Goldasz} and Bogdan {Sapinski} and Michal {Sedlačík} and Zbyněk {Strecker} and Michal {Kubík}", title="Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves", journal="Actuators", year="2023", volume="12", number="12", pages="1--14", doi="10.3390/act12120449", issn="2076-0825", url="https://www.mdpi.com/2076-0825/12/12/449" }