METHOD FOR DETERMINING THE FATIGUE OF A PUMP ROTOR OF A GAS TURBOPUMP

摘要

A method for determining the fatigue of a pump rotor of a gas turbopump h as the following method steps: continuous detection of the rotor rotational speed (n) of the pump rotor, detection of the local rotational-speed maxima and minima of a temporal rotational-speed profile under consideration, assoc iation of the rotational-speed maxima and minima with one another to form pa irs, detection of a pair fatigue value (L) for each of the rotational-speed pairs, and accumulation of all pair fatigue values (L) to form an overall fa tigue value (Ltot). It becomes possible in this way to detect the cycle load ing for the pump rotor of a vacuum pump and to incorporate it into the calcu lation of an overall fatigue value.