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RESEARCH OF THE STATIC STRENGTH OF A PINION WHICH IS PART IN A PINION-SHAFT

The article presents the results of determining the stress-strain state by the method of finite elements of a pinion-shaft weighing a little more than nine kilograms as a volumetric structure, taking into account the spatial application of forces with an assessment of the static strength by relative equivalent stresses, which were determined according to IV theory of strength using the module T-Flex CAD Analyze of the embedded in the educational version T-Flex CAD. The solution is based on the well-known method for assessing the strength, which implies considering the gearing of the teeth as the compression of two cylinders along the dedicated contact areas. Such areas were selected when calculating on the interacting side surfaces of the pinion teeth. The total static strength of the pinion was 1.162, which is more than the minimum allowable 1.1. The maximum equivalent stresses when calculating the static strength of the pinion-shaft in the area of the interacting pinion teeth are 25 % less than the maximum contact stresses, which are determined by standard methods given in the known literature. In the simulation, although idealizing working conditions were used, despite this, such a method for assessing static strength can be used at the stage of design calculation, since this allows minimizing design errors. Moreover, the use of CAE modules in calculating the strength of gears, in addition to standard methods, allows to reduce the costs of development work.