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Research Papers: Other (Seals, Manufacturing)

Wear Behavior of Rotary Lip Seal Operating in a Magnetorheological Fluid Under Magnetic Field Conditions

[+] Author and Article Information
Peng Zhang, Kwang-Hee Lee

Department of Mechanical Engineering,
Inha University,
Incheon 22212, South Korea

Chul-Hee Lee

Department of Mechanical Engineering,
Inha University,
Incheon 22212, South Korea
e-mail: chulhee@inha.ac.kr

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received June 18, 2016; final manuscript received June 27, 2017; published online September 29, 2017. Assoc. Editor: Daejong Kim.

J. Tribol 140(2), 022201 (Sep 29, 2017) (8 pages) Paper No: TRIB-16-1195; doi: 10.1115/1.4037361 History: Received June 18, 2016; Revised June 27, 2017

A magnetorheological fluid (MRF) is one of many smart materials that can be changed their rheological properties. The stiffness and damping characteristics of MRF can be changed when a magnetic field is applied. This technology has been successfully employed in various low and high volume applications, such as dampers, clutches, and active bearings, which are already in the market or are approaching production. As a result, the sealing performance of MRF has become increasingly important. In this study, the wear properties of seals with MRFs were evaluated by a rotary-type lip seal wear tester. The test was performed with and without a magnetic field. The leakage time was monitored during the tests in typical engine oil conditions. The results showed that the wear resistance of the seal with MRF was decreased under the magnetic field.

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Figures

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Fig. 1

MRF rotary lip seal wear tester

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Fig. 2

Enlarged detail of the rotary lip seal with the MRF

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Fig. 3

The dynamic eccentricity of shaft when rotate for one cycle

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Fig. 4

Rotary lip seal and shaft sample

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Fig. 5

Seal leakage image of travel time for the sealing wear test: (a) oil, (b) MRF without a magnetic field, and (c) MRF with a magnetic field

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Fig. 6

Seal leakage time with oil and MRF

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Fig. 7

Morphology of worn surface of shaft: (a) original surface, (b) sealing oil, (c) sealing MRF without a magnetic field, and (d) sealing MRF with a magnetic field

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Fig. 8

Surface morphology of the sealing zone: (a) original surface, (b) sealing oil, (c) sealing MRF without a magnetic field, and (d) sealing MRF with a magnetic field

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Fig. 9

Cross-sectional morphology of the rotary lip seal: (a) original surface, (b) sealing oil, (c) sealing MRF without a magnetic field, and (d) sealing MRF with a magnetic field

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Fig. 10

Two-dimensional cross-sectional profile of the sealing zone before and after the sealing test

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Fig. 11

General morphology of the worn surface of the rotary lip seal (30× and 300×): (a) sealing oil, (b) sealing MRF without a magnetic field, and (c) sealing MRF with a magnetic field

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Fig. 12

Scanning electron microscope (SEM) morphology of the worn surface of the rotary lip seal (1800× and 5000×): (a) sealing oil, (b) sealing MRF without a magnetic field, and (c) sealing MRF with a magnetic field

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