A Novel Seal Design to Enhance MR Brake Performance

Kumar, D and Harmain, GA and Gaurav, G and Lijesh, KP and Kuriachen, B and Hirani, H and Philip, JT (2022) A Novel Seal Design to Enhance MR Brake Performance. In: Transactions of the Indian Institute of Metals .

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Abstract

Magnetorheological (MR) brakes offer time invariant performance and online friction force control which make them an appealing alternative to traditional disc brakes. However, leakage of MR fluid through wear of seal and friction losses degrades its performance. Nitrile, Silicon, and Viton are the three types of seal materials employed in this investigation. To evaluate the wear and friction response of three seals, tests were conducted on a block on disc lubricity tester using synthesized MR fluid. Scanning electron microscope (SEM) and Energy-dispersive spectroscopy (EDS) was used to investigate the surface morphology and the chemical composition of seal material after experiments. To validate the results of block on disc lubricity tester and investigate the time of failure of each material seal, experiments were carried out using a developed MR brake test setup. Based on the findings, polymeric materials are not appropriate for preventing MR fluid leakage. Hence, a novel seal design with permanent magnets has been proposed to prevent MR fluid leaking from the MR brake casing. The work can be regarded as the first experimental investigation to effectively replace polymeric seal with magnetic seal and has proven to be very effective for long-term use of MR brakes. © 2022, The Indian Institute of Metals - IIM.

Item Type:	Journal Article
Publication:	Transactions of the Indian Institute of Metals
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Magnetic seal; MR brake; MR fluid; Polymeric seal
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	31 Jan 2023 04:58
Last Modified:	31 Jan 2023 04:58
URI:	https://eprints.iisc.ac.in/id/eprint/79587

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