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TECHNICAL PAPERS

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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References

Feng,  M., Ono,  K., and Kenji,  M., 2001, “Fundamental Characteristics of a New Variable Torque Clutch With Skewed Rollers,” ASME J. Mech. Des., 123, pp. 436–446.
Feng,  M., Ono,  K., and Kenji,  M., 2001, “Studies on Contact Geometry and Limiting Resistant Torque Characteristics of the Variable Torque Slipping Clutch With Skewed Rollers,” JSME Int. J., Ser. C, 44, pp. 763–774.
Feng,  M., Ono,  K., and Kenji,  M., 2003, “The FEM Analysis of Dry Contact in the Variable Torque Slipping Clutch With Skewed Rollers by Using Weighted Simplex and BFGS Methods,” ASME J. Mech. Des., 125, pp. 186–199.
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Figures

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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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