Siemens Aktiengesellschaft

Karsten Klein

Ramesh Subramanian

Silke Settegast

Ralf Förster

Alexandr Sadovoy

Tobias Brett

Catrina Michel

Ulrich Laudien

Martin Witzel

Andy Borchardt

A method is provided for determining the diameter of a rotor of a turbomachine, rotor being equipped with rotor blades. The method involves setting the rotor with the rotor blade ring in rotation, arranging a clearance measuring device assigned to the rotor blade ring outside the region of the latter, measuring the distance to the rotor blades of the rotor blade ring which are rotating past the clearance measuring device, and using the measured distance for determining the diameter of the rotor. During measuring, the rotational speed is identical to, almost identical to or higher than the setpoint rotational speed of the rotor.

Method for determining the diameter of a rotor, which is equipped with rotor blades, of a turbomachine

The invention relates to a method for electrical discharge machining of electrically non-conductive material in which a layer of an electrically conductive substance is applied as an auxiliary electrode on the electrically non-conductive material. Said method is characterized in that the electrically conductive substance is chemically converted by oxidative heat treatment after electrical discharge machining.

Method for electrical discharge machining of electrically non-conductive material

Layered systems, which are used at high temperatures, often degrade rapidly when a layer has been lost, leading to the damage or loss of the component that consists of said layered system. A described layered system comprises at least one cooling safety orifice, which is e.g. covered by an intermediate layer and an outer layer. The cooling safety orifice opens if the layers are damaged, in such a way that the layered system is additionally cooled by a coolant that flows through the cooling safety orifice.

Layer system, use and process for producing a layer system

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Berlin, Germany

Karsten Klein