Patent ID: 7758301

Claim:
An arrangement for detecting a shaft break on a rotor of a first turbine ( 10 ) positioned upstream, with respect to a gas flow direction, from a second turbine ( 11 ) in a gas turbine machine, said arrangement comprising a mechanical operator element ( 16 ) positioned between the rotor of the first turbine ( 10 ) and a stator of the second turbine ( 11 ) radially inwardly relative to a gas flow channel, and a sensor element ( 21 ) guided in the stator of the second turbine ( 11 ), wherein the mechanical operator element is linearly slidably arranged between the rotor of the first turbine and the sensor element, and is located adjacent to the rotor such that the rotor will strike the operator element and linearly slide the operator element with a linear sliding motion toward the sensor element in the event of the shaft break, wherein the sensor element is arranged and adapted to convert the linear sliding motion of the operator element into an electrical signal and to transmit the electrical signal to a switching element positioned radially outwardly relative to the gas flow channel on a housing of the gas turbine, and wherein the sensor element ( 21 ) is guided in a radial direction in the stator of the second turbine ( 11 ), and is withdrawable out of the stator of the second turbine ( 11 ) in the radial direction.