Load Capacity of Cages of Roller Bearings for Planet Wheels,
BOCHUM UNIV (GERMANY F R)
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In planetary gears the rotation of the planet-carrier generates forces of inertia, which can cause fatigue failures of cages in roller bearings of planet wheels. By means of computer routines forces of inertia and counter forces as well as stress resultants, nominal stresses, stress concentration factors and stress gradients are calculated for bearing cages of various design. Yield strength and fatigue strength of samples of cage material are determined experimentally, and fatigue stress diagrams for cages of different shape and material are worked out. The thus calculated safety factors against fatigue failure are confirmed by test runs of bearings on a test bench.