Study of Belt Friction with Three Times Wrapping Condition

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概要

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• Theoretical study was carried out to investigate the frictional property of belt wrapped three times around a circular shaft. A belt equation of fractional expression was derived. The self-locking mechanism was investigated theoretically by the equation. The discriminant of self-locking condition was clarified. The necessary conditions for self-locking are <I>μ</I>b < <I>μ</I> and sufficient wrapping angle of the belt, where <I>μ</I> is the coefficient of friction between the belt and shaft and <I>μ</I>b is the coefficient of friction between the belt and belt. According to the formula derived, self-locking occurs even under a realistic condition. It occurs when the ratio of belt tensions becomes 0 or negative. Providing the coefficient of friction <I>μ</I> and the ratio of the coefficients of friction <I>κ</I> = <I>μ</I>b/<I>μ</I>, some critical over-wrapping angles for self-locking were calculated numerically. Furthermore some normal force distributions in self-locking conditions were calculated theoretically.

著者

• Imado Keiji

  Faculty Of Engineering Oita University

• Uesaka Kyouhei

  Production Engineering Section, THK Co., Ltd.

• Nakata Hironori

  Faculty of Engineering, Oita University

関連論文

• A Study of Hall Element Method for Ball Motion in a Ball Bearing
• The Influences of Race Failure on Ball Motions in a Radial Ball Bearing under Static Moment Loading
• Study of Belt Friction with Three Times Wrapping Condition
• Experimental Study of Clutch Utilizing Self-Locking Property of Belt

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