Electric sliding contacts are widely used in various electrical components such as for home appliances and automobiles. The purpose of the present study is to improve the performance characteristics of the electric sliding contacts operating under the lubricated condition by the combination of circular grooved disk and rider with a spherical surface. The experimental and theoretical analyses have been carried out to investigate the effect of cross-sectional area of circular grooves provided in the rotating disk surface on the frictional characteristics and the electrical conductivity. The experimental analysis is conducted with a pin-on-disk friction tester to measure the frictional force and the contact voltage between the sliding contacts under the lubricated condition. The oil-film force and the frictional force between the rider and disk are also calculated with the Reynolds equation and they are found to be closely corresponding to the experimental results. The results obtained in the present study show that increasing the cross-sectional area of the circular grooves on the disk extends the operation condition yielding the metal contact to a higher value of the bearing characteristic number S, which is defined by ηU0L0λ/W (η is the lubricant oil viscosity, U0 is the sliding velocity, L0 is the rider arc length in the sliding direction at the middle of radial width, W is the applied load, and λ is the aspect ratio of rider), and also decreases the frictional force at the maximum value of S at which the rider could contact with the disk surface. These are expected since upstream lubricant oil dragged into the contact region tends to easily leak out along the circular grooves, yielding a lower oil-film force between the rider and disk and enhancing the metal contact.
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January 2016
Research-Article
Lubrication Characteristics of Electric Sliding Contacts Consisting of Rotating Circular Grooved Disk and Stationary Rider With Spherical Surface Under Lubricated Condition
Satoru Kaneko,
Satoru Kaneko
Professor
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: kaneko@mech.nagaokaut.ac.jp
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: kaneko@mech.nagaokaut.ac.jp
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Hiroo Taura,
Hiroo Taura
Associate Professor
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: htaura@mech.nagaokaut.ac.jp
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: htaura@mech.nagaokaut.ac.jp
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Ryosuke Fukasawa,
Ryosuke Fukasawa
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
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Hitoshi Kanai
Hitoshi Kanai
Oiles Corporation,
1-6-34 Kounan,
Minato-ku,
Tokyo 100-0011, Japan
1-6-34 Kounan,
Minato-ku,
Tokyo 100-0011, Japan
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Satoru Kaneko
Professor
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: kaneko@mech.nagaokaut.ac.jp
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: kaneko@mech.nagaokaut.ac.jp
Hiroo Taura
Associate Professor
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: htaura@mech.nagaokaut.ac.jp
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
e-mail: htaura@mech.nagaokaut.ac.jp
Ryosuke Fukasawa
Department of Mechanical Engineering,
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
Nagaoka University of Technology,
1603-1 Kamitomiokamachi,
Nagaoka-shi, Niigata 940-2188, Japan
Hitoshi Kanai
Oiles Corporation,
1-6-34 Kounan,
Minato-ku,
Tokyo 100-0011, Japan
1-6-34 Kounan,
Minato-ku,
Tokyo 100-0011, Japan
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received October 7, 2014; final manuscript received June 19, 2015; published online September 22, 2015. Assoc. Editor: Daniel Nélias.
J. Tribol. Jan 2016, 138(1): 011705 (9 pages)
Published Online: September 22, 2015
Article history
Received:
October 7, 2014
Revised:
June 19, 2015
Citation
Kaneko, S., Taura, H., Fukasawa, R., and Kanai, H. (September 22, 2015). "Lubrication Characteristics of Electric Sliding Contacts Consisting of Rotating Circular Grooved Disk and Stationary Rider With Spherical Surface Under Lubricated Condition." ASME. J. Tribol. January 2016; 138(1): 011705. https://doi.org/10.1115/1.4031393
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