Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves
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 part...
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MDPI AG
2023-12-01
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| Online Access: | https://www.mdpi.com/2076-0825/12/12/449 |
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| author | Jiří Žáček Janusz Goldasz Bogdan Sapinski Michal Sedlačík Zbyněk Strecker Michal Kubík |
| author_facet | Jiří Žáček Janusz Goldasz Bogdan Sapinski Michal Sedlačík Zbyněk Strecker Michal Kubík |
| author_sort | Jiří Žáček |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T21:05:49Z |
| format | Article |
| id | doaj.art-bbbb1f4a4ac6477895b8dcc77e689020 |
| institution | Directory Open Access Journal |
| issn | 2076-0825 |
| language | English |
| last_indexed | 2024-03-08T21:05:49Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj.art-bbbb1f4a4ac6477895b8dcc77e6890202023-12-22T13:44:53ZengMDPI AGActuators2076-08252023-12-01121244910.3390/act12120449Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype ValvesJiří Žáček0Janusz Goldasz1Bogdan Sapinski2Michal Sedlačík3Zbyněk Strecker4Michal Kubík5Faculty of Mechanical Engineering, Brno University of Technology, 616 69 Brno, Czech RepublicFaculty of Electrical and Computer Engineering, Cracow University of Technology, 31-155 Cracow, PolandDepartment of Process Control, AGH University of Krakow, 30-059 Cracow, PolandCentre of Polymer Systems, Tomas Bata University in Zlín, 760 01 Zlín, Czech RepublicFaculty of Mechanical Engineering, Brno University of Technology, 616 69 Brno, Czech RepublicFaculty of Mechanical Engineering, Brno University of Technology, 616 69 Brno, Czech RepublicMagnetorheological (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.https://www.mdpi.com/2076-0825/12/12/449magnetorheological fluidgradient pinch modevalvedynamic range |
| spellingShingle | Jiří Žáček Janusz Goldasz Bogdan Sapinski Michal Sedlačík Zbyněk Strecker Michal Kubík Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves Actuators magnetorheological fluid gradient pinch mode valve dynamic range |
| title | Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves |
| title_full | Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves |
| title_fullStr | Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves |
| title_full_unstemmed | Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves |
| title_short | Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves |
| title_sort | assessment of the dynamic range of magnetorheological gradient pinch mode prototype valves |
| topic | magnetorheological fluid gradient pinch mode valve dynamic range |
| url | https://www.mdpi.com/2076-0825/12/12/449 |
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