Contact Stress Analysis of Needle Roller Bearing Used in Synchromesh Gear Box

Abstract

The optimum selection of a bearing generally depends on particular application such as to transfer loads between the rotating and stationary members, and to permit free rotation. From among the wide range of bearings available in the market today has various considerations, such as the load-carrying capacity, the life of the bearing, and the working rotational speed need to be considered before a suitable bearing can be selected. Here for this synchromesh gear box system, needle roller bearing is used. So, all the required data for the required calculations are given by the KCI Industries (India) Ltd. With the help of Hertz Contact Stress theory (for Line Contact due to the use of Needle Roller Bearing), by using the maximum value of load for the roller at zero position, we find the value of contact width, maximum bearing pressure, principle stresses and von Mises stress for each particular bearing which is used for particular gear pair of synchromesh gear box. In this case, after doing the contact stress analysis through analytical method, we can conclude that if we change the value of L10 life (in hours) from the theoretical value of L10 life (in hours), there is no need to change the bearing whether there is high value of load on the needle roller bearing than the theoretical value of load. A proper understanding of the mechanism of contact between two or more surfaces is crucial in the design process of many devices. Analytical and computational methods are useful for knowing the characteristics at the contact interface in order to properly understand geometry and its effect on surface properties. The surface was simplified so that Hertz theory could be used to model surface deformation and resulting contact stresses. From this contact stress analysis in future, selection of bearing is done by the calculation of the induced stress like von-misses and shear stress, also by increasing the load carrying capacity and also increasing the contact area, max and average compressive stress, max deflection, and max shear stress along with its location with the help of Hertzian contact stress theory.

Cite this Article
Shingala Niraj R, Sata Ankit V, Delvadiya Parth V, et al. Contact Stress Analysis of Needle Roller Bearing Used In Synchromesh Gear Box. Trends in Machine Design. 2018; 5(1): 5–20p.