DEVELOPMENT OF BREAKTHROUGH TECHNOLOGIES FOR STRENGTHENING OF TURBO-EXPANSION INSTALLATIONS ELEMENTS

The paper is aimed at the development of breakthrough technologies for the strengthening of turbo-expander installations. For this purpose, new ways proposed for ensuring the strength of the most hardly loaded elements of turbo-expander installations. They involve a combination of known methods of discrete and continuous strengthening. However, at the same time, the problem of justification of rational parameters and modes of technological operations arises. This problem is caused by the fact that such complex strengthening methods are characterized by a significantly expanded set of varied parameters. In this wide parametric space, their optimal set differs from the optimal sets in narrower subspaces. To determine the influence of varied parameters on the characteristics of the stress-strain state of contacting discretely-continuously strengthened bodies, a number of studies were carried out. The shape of the strengthening area and the material properties of the strengthened zones are varied. A significant influence of varied parameters on the distribution and level of contact pressure and equivalent stresses in the system of contacting bodies has been established. Based on the analysis of the results of these and a number of other studies, recommendations have been developed regarding the design and technological solutions of elements of turbo-expander installations. On this base, a number of turbo-expander units with improved technical characteristics have been developed. In particular, the growth of their resource and efficiency have been ensured. Keywords: turbo-expander, discrete and continuous strengthening, contact interaction, stress-strain state, technical characteristics