F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 27/02 (2006.01)
Patent
CA 2676681
A method for determining the fatigue of a pump rotor of a gas turbopump has 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, association of the rotational-speed maxima and minima with one another to form pairs, 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 fatigue value (Ltot). It becomes possible in this way to detect the cycle loading for the pump rotor of a vacuum pump and to incorporate it into the calculation of an overall fatigue value.
Ce procédé pour déterminer la fatigue d'un rotor d'une turbopompe à gaz comprend les étapes suivantes : détermination en continu de la vitesse de rotation (n) du rotor de la pompe ; détermination des maxima et minima locaux d'une allure observée de la vitesse de rotation en fonction du temps ; association des maxima et minima entre eux par paires ; détermination d'une valeur de fatigue de paire (L) pour chacune des paires de vitesses de rotation ; et accumulation de toutes les valeurs de fatigue de paires (L) pour former une valeur de fatigue totale (Ltot). Il est ainsi possible de déterminer la sollicitation cyclique du rotor d'une pompe à vide, et de l'incorporer dans le calcul d'une valeur de fatigue totale.
Blumenthal Roland
Bohry Dieter
Froitzheim Michael
Kieffer Manfred
Palten Thomas
Fetherstonhaugh & Co.
Oerlikon Leybold Vacuum Gmbh
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