METHOD OF CHARACTERISTICS DETERMINATION OF NON-SYNCHRONOUS OSCILLATIONS OF IMPELLER OF TURBINE MACHINE

摘要

FIELD: machine building.SUBSTANCE: during the method implementation of characteristics determination of non-synchronous oscillations of impeller of turbine machine, comprising the installed in casing at least one stage with the impeller and guide or nozzle vanes, number of impeller blades, and number of guide and nozzle vanes are calculated. By tests the frequency impeller oscillations corresponding to modes of maximum stresses in the impeller blades within work rage of turbine machine speeds is determined. For the determined frequencies the coefficients (k; k) for running forward and for running backward deformation waves are calculated. Based on the calculated coefficients the quantitative measure of the diametrical oscillations of the impeller at the given frequency is estimated.EFFECT: reduced time for tests during characteristics determination of the non-synchronous oscillations of the turbine machine rotor, increased authenticity of determination of quantitative measure of diametrical shapes of oscillations of the turbine machine impeller.1 tbl, 2 dwg