Mixed EHL Analysis of the Variable Torque Slipping Clutch With Skewed Rollers

[+] Author and Article Information
Ming Feng, Kyosuke Ono

Department of Mechanical Engineering and Science, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan

Kenji Mimura

MIM Engineering Company Ltd., 2-12-1 Kirigaoka Midori-ku, Yokohama, 226-0016, Japan

J. Tribol 125(4), 756-769 (Sep 25, 2003) (14 pages) doi:10.1115/1.1575773 History: Received June 26, 2002; Revised February 25, 2003; Online September 25, 2003
Copyright © 2003 by ASME
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Configuration and geometrical parameters of the slipping clutch: (a) Configuration of the slipping clutch (Cross Skewing); and (b) Geometrical parameters and coordinate systems.
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Kinematical and geometrical relations at an internal contact point
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Contact model of two rough surfaces
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Coordinate systems of the hydrodynamic lubrication and velocity relations
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Parameters of the attitude of the roller
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Forces acting upon the roller
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Forces acting upon the races and geometrical relations: (a) Frictional forces on the tangential plane; and (b) Forces on the radial principal plane
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Computational zone and triangle elements
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Flow chart of computational procedure
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Distribution of total pressure: (a) Internal contact; and (b) External contact (R=40 mm, Σ=−55°, Zc=−12 mm,b=10 mm,bp=8 mm,r=2 mm,r22=100 mm,Nr=20, μ=0.10, n=330 rpm,|Ūc|=4.32×10−11,|V̄c|=2.46×10−11,F̄Z(a)=0.00256(5888 N),m̄ZI=0.00145(38.4 Nm))
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Hydrodynamic and asperity contact pressure distributions
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Film thickness: (a) Internal contact; and (b) External contact
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Pressure and film thickness distributions along the central contact line: (a) Internal contact; and (b) External contact
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Influence of the axial slipping on the hydrodynamic pressure distribution
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Pressure and film thickness distributions along the circumferential direction at the position where the profiling starts (z̄(c)=0.4)
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Comparison between theoretical and experimental results: (a) Σ=±22.3°; and (b) Σ=±26.8°
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Resistant torque versus rotation speed under different geometrical dimensions
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Global and local coordinate systems and triangle element




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