METHOD FOR DETERMINING SERVICE LIFE OF TURBOMACHINE DISCS

摘要

FIELD: engines and pumps.SUBSTANCE: invention relates to turbomachine building, in particular to methods for determining service life of turbomachines discs by modelling during bench tests of working conditions of loading and damage in critical zones of turbomachine discs. Essence of the invention consists in the following: contact strains are generated in upper attachment hole of wheel rim element. Wheel rim element is loaded with recurrent cyclic tensional strains. Sequence of recurrent cyclic tensional strains is preset as increasing stepped cycles simulating diagram of turbomachine spinup from cold start to its stop. Each loading step is followed by specific loading time adjustment. Place of crack appearance and its growth path in critical zones of turbomachines discs observed during operation are simulated. Number of loading cycles till fracture of wheel rim element is recorded.EFFECT: possibility of simulation during bench tests of working conditions of loading and damage in critical zones of turbomachine discs.1 dwg