Siemens Aktiengesellschaft

Rolls-royce Deutschland Ltd & Co. Kg

Burkhard Hayess

Wolfram Beele

This invention relates to a method for the detection of a shaft failure in a turbomachine with the object of initiating thereupon an appropriate speed-limiting action, more particularly a rapid fuel shut-off on an aero gas-turbine system, in which a torque-exerting turbine rotor and a torque-recipient unit are connected via the shaft ( ) to be monitored for failure, said shaft being supported at its ends in at least two roller bearings ( ). In this method, the rotational frequencies (f , f ) of the two shaft ends of the shaft compared with each other continually and essentially in real time, with a failure of the shaft ( ) inferred if the rotational frequency (f ) of the roller bearing ( ) on the side of the turbine rotor exceeds the rotational frequency (f ) of the roller bearing ( ) on the side of the torque-recipient unit. Preferably, the rotational frequency of the respective shaft end is determined by way of Fast-Fourier Transmission and an arithmetic processor via separate measuring channels for each roller bearing ( ), with recourse being taken to one or more typical roller bearing frequencies emitted by these roller bearings during their rotation (FIG. ).

Method and apparatus for recognition of a shaft rupture in a turbo-engine

A method for coating a component with a thermal barrier coating, includes placing the component in a coating chamber and maintaining the component at a component temperature. A vacuum is established in the coating chamber. The process parameters vacuum pressure and component temperature are controlled together, at least during the coating process with a deposition of material forming the thermal barrier coating. The control takes place in such a way that the parameters are in a respective set-point value range and the thermal barrier coating grows with a columnar structure on the component. A coating device is also provided.

Growing community of inventors

Rangsdorf, Germany

Burkhard Hayess