Numerical Estimation of the Residual Life-Time of the Elements of the Centrifugal Pump of the Energy Station Due to Corrosion Wear

This paper considers the issue of numeral estimating the residual strength of a centrifugal pump operating in excess of the design life in the line of pumps of the power station. Using modern technologies of computer and mathematical modeling the calculations of pump body for define its stress-strain state taking into account the change of geometry of body details had been carried out. The three-dimensional CE models are made, which take into account the actual geometry of the pump parts and the predict of its possible change for the period of extended time work. Estimation of static strength was performed for the main operating mode of the pump (under normal operating conditions). Taking into account the predicted values of the percentage of thinning of the wall of the pump, the statistical deformed state of the structure had been investigated. On the basis of statistical data, the parameter of damage and the probability of failure-free operation of the structure had been determined.