Method for determining the fatigue of a pump rotor of a gas turbopump

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United States of America Patent

PATENT NO 8751170
APP PUB NO 20110046897A1
SERIAL NO

12528210

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Abstract

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A method for determining the fatigue of the pump rotor of a gas turbopump comprises the following method steps:

    continuous determination of the rotational speed (n) of the pump rotor,determination 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 each other to form pairs,determination of a pair fatigue value (L) for each of the rotational speed pairs, andaccumulation of all pair fatigue values (L) to form a total fatigue value (Ltot).In this manner it is possible to determine the cyclic stress for the pump rotor of a vacuum pump and to include it in the calculation of a total fatigue value.

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Patent Owner(s)

Patent OwnerAddress
LEYBOLD GMBH50968 KÖLN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Blumenthal, Roland Erftstadt, DE 12 33
Bohry, Dieter Köln, DE 2 17
Froitzheim, Michael Dormagen, DE 9 29
Kiefer, Manfred Wesseling, DE 1 6
Palten, Thomas Köln, DE 4 20

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