Preliminary investigation of magneto-rheological fluid durability in continuous slippage clutch

Desrosiers, J-F; Bigué, J-P Lucking; Denninger, Marc; Julio, Guifré; Plante, Jean‐Sébastien; Charron, François

doi:10.1088/1742-6596/412/1/012022

Cited by 14 publications

(29 citation statements)

References 9 publications

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“…It is observed that oxygen increased from 0.75% to 1.75%, indicating that the oxidation affected the MR fluid iron particles during the long operation. This finding confirms the study conducted by Desrosiers et al [14], who worked on slippage clutch systems. Another study conducted by Plachy et al [31] investigated the impact of thermal and chemical oxidative processes of carbonyl iron particles on MR performances, and found that the oxidized particles showed lower values of the yield stress that then affect the viscosity of MR fluid.…”

Section: Resultssupporting

confidence: 93%

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Material Characterization of a Magnetorheological Fluid Subjected to Long-Term Operation in Damper

et al. 2018

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This paper investigates the field-dependent rheological properties of magnetorheological (MR) fluid used to fill in MR dampers after long-term cyclic operation. For testing purposes, a meandering MR valve was customized to create a double-ended MR damper in which MR fluid flowed inside the valve due to the magnetic flux density. The test was conducted for 170,000 cycles using a fatigue dynamic testing machine which has 20 mm of stroke length and 0.4 Hz of frequency. Firstly, the damping force was investigated as the number of operating cycles increased. Secondly, the change in viscosity of the MR fluid was identified as in-use thickening (IUT). Finally, the morphological observation of MR particles was undertaken before and after the long-term operation. From these tests, it was demonstrated that the damping force increased as the number of operating cycles increases, both when the damper is turn on (on-state) and off (off-state). It is also observed that the particle size and shape changed due to the long operation, showing irregular particles.

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Section: Resultssupporting

confidence: 93%

“…The original low viscosity MR fluid will thicken and change into an unmanageable paste-like material. Therefore, under these circumstances, MR fluid is no longer suitable for controlling the performances of the applied devices and systems [6,11,14,15].…”

Section: Introductionmentioning

confidence: 99%

Material Characterization of a Magnetorheological Fluid Subjected to Long-Term Operation in Damper

et al. 2018

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“…where g(µ, |q r |) represents the viscous component of the damping force, µ the viscosity of the fluid, u the electric field or the current for ER and MR respectively and C denotes a coefficient that depends on the physical properties of the fluid and on the geometry of the damper. The MR operating principle is often used to realize VDAs in robotics [90] [91] [83] [92] and also in vehicles [93] [94]. A more accurate model and a comparison between MR and FD can be found in [85], where it is pointed out that MR dampers, like the FDs, present high hysteresis.…”

Section: Electrorheological and Magnetorheological Dampersmentioning

confidence: 99%

Variable impedance actuators: A review

Vanderborght

Albu-Schäffer²,

Bicchi

et al. 2013

Robotics and Autonomous Systems

879

550

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Variable Impedance Actuators (VIA) have received increasing attention in recent years as many novel applications involving interactions with an unknown and dynamic environment including humans require actuators with dynamics that are not well-achieved by classical stiff actuators. This paper presents an overview of the different VIAs developed and proposes a classification based on the principles through which the variable stiffness and damping are achieved. The main classes are active impedance by control, inherent compliance and damping actuators, inertial actuators, and combinations of them, which are then further divided into subclasses. This classification allows for designers of new devices to orientate and take inspiration and users of VIA's to be guided in the design and implementation process for their targeted application.

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“…With other types of base oil, such as polyalphaolefin and perfluorinated polyether (PFPE), polymerization is not an issue. However, petroleum-based MRFs have a tendency to outgas, resulting in a pressure build-up which can induce leaks and reduce durability (Desrosiers et al, 2013; Godmunsson, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The dominant failure modes generally depend on the MRF composition and the conditions in which the fluid is operated (e.g. temperature, magnetic field intensity, shear rate) (Desrosiers et al, 2013). The diversity of MRF compositions and failure modes makes understanding MRF durability very challenging.…”

Section: Introductionmentioning

confidence: 99%

A magnetic screw pump for magnetorheological clutch durability enhancement

Pilon

Landry-Blais

Gillet

et al. 2020

Journal of Intelligent Material Systems and Structures

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Magnetorheological clutches have great potential for demanding applications such as powertrains and aircraft primary flight controls. However, in such high-power applications (>1 kW), durability is a challenge because of the continuous slippage at the clutch shear interface. To improve durability, this research studies the potential of using a magnetic screw pump to promote fluid mixing within a magnetorheological clutch. The screw flights are made of magnetorheological fluid formed by the concentration of the magnetic field lines around helical grooves machined into the shear interface (drum) of the clutch. While the magnetic pump does not display a typical screw pump behavior, a semi-empirical yield screw pump model is proposed to better understand the macroscopic behavior. Experimental flow characterization results show that the pressure–flow relation is significantly affected by the number of grooves, magnetic field intensity, and rotational speed. For a clutch containing 50 mL of magnetorheological fluid, maximum flow rates of up to 25 mL/min and a maximum pressure of 150 kPa are achieved. Finally, durability test results show that the magnetic screw pump can increase durability by up to 42% when compared to a standard magnetorheological clutch, confirming that such a device is a viable solution for promoting durability.

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Preliminary investigation of magneto-rheological fluid durability in continuous slippage clutch

Cited by 14 publications

References 9 publications

Material Characterization of a Magnetorheological Fluid Subjected to Long-Term Operation in Damper

Material Characterization of a Magnetorheological Fluid Subjected to Long-Term Operation in Damper

Variable impedance actuators: A review

A magnetic screw pump for magnetorheological clutch durability enhancement

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