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A Novel Seal Design to Enhance MR Brake Performance

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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.

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Acknowledgements

The authors are very thankful to the Department of Mechanical Engineering and Central Research Facility (CRF) of IIT Delhi for providing characterization facilities. The authors also acknowledge Mr. Pawan Kumar for helping in conducting the experiments.

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Authors and Affiliations

  1. Indian Institute of Technology, New Delhi, Delhi, India

    Deepak Kumar, K. P. Lijesh & Harish Hirani

  2. Carnegie Mellon University, Pittsburgh, USA

    Deepak Kumar

  3. National Institute of Technology, Srinagar, India

    G. A. Harmain

  4. KIET Group of Institutions, Ghaziabad, India

    Gaurav Gaurav

  5. National Institute of Technology, Calicut, India

    Basil Kuriachen

  6. Indian Institute of Science, Bangalore, Karnataka, India

    Jibin T. Philip

  7. Amal Jyothi College of Engineering, Kanjirappally, Kerala, India

    Jibin T. Philip

Authors
  1. Deepak Kumar
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  2. G. A. Harmain
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  3. Gaurav Gaurav
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  4. K. P. Lijesh
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  5. Basil Kuriachen
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  6. Harish Hirani
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  7. Jibin T. Philip
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Correspondence to Jibin T. Philip.

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Kumar, D., Harmain, G.A., Gaurav, G. et al. A Novel Seal Design to Enhance MR Brake Performance. Trans Indian Inst Met 76, 2335–2342 (2023). https://doi.org/10.1007/s12666-022-02848-3

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  • DOI: https://doi.org/10.1007/s12666-022-02848-3

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