Experimental Research of Radial Deformation of the Outer Shell of Roller One-Way Clutches

Roller one-way clutches have been widely used in drives of modern technical equipment. When a load is transferred to the outer shell of such mechanisms, large normal forces act on the outer shell, causing considerable radial deformation. Usually, the radial deformation of the outer shell is not calculated, and geometrical parameters are set based on design recommendations. Theoretical and experimental studies of the outer shell stiffness are not performed either. The article presents the results of a full-scale experiment to study the effects of the transferred load (torque) and the design parameters of the roller one-way clutch (wedging angle and number of wedging rollers) on the radial deformation of the outer shell. The validity of the proposed empirical relationship for calculating the radial deformation of the outer shell is confirmed experimentally. The discrepancy between the experimental and the theoretical values of radial deformations for most experiments is from 2.9 to 17.5 %. It has been experimentally established that as the load increases, the growth of the radial deformation slows down slightly and changes by the power characteristic; an increase of the wedging angle from 5 to 9° leads to a decrease in the radial deformation by 1.28–1.51 times; and a reduction in the number of rollers from 3 to 5 leads to a decrease in deformation by 1.5–1.7 times.

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