Optimum displacement function of external contour points of contact pair hub taking into account the thermal stresses and roughness inner contour
Keywords:
contact pair, hub, shaft, friction rough surface, temperature, minimizing of bushing stress stateAbstract
Based on the model of friction rough surface and the equal strength principle theoretical analysis on the definition of displacement function of external contour points of contact pair hub carried out taking account the temperature difference in the details of the contact pair. Force calculation scheme most corresponds to physical nature of actual loading is used. According to this scheme, in the place of shaft and bushing contact the normal distributed loads and the corresponding to loads friction forces act. The friction forces are arising in work process and not known in advance. The friction forces to be determined from the solution of the problem of shaft and bushing contact interaction, taking into account the roughness of real friction surface, frictional heat generation and surface wear of the contact pair parts. The minimization of the stress state of the contact pair bushing is carried out by using of the equal strength principle. The obtained displacement function of external contour points of the bushing provides increase of load bearing capacity of the bushing contact pair. As an example the calculation of the contact pair applied to downhole sucker rod oil pump is considered.
References
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