Publication detail

Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves

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

12

State

Swiss Confederation

Pages from

1

Pages to

14

Pages count

14

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"
}