| 摘要 |
A sensor 7 for use with a gas turbine to detect abnormal turbine shaft motion. The sensor has a frangible sensor element 10 and a cutter or separator coupled to and moveable with the turbine shaft to break or cut through the frangible sensor element on axial movement of the shaft. The frangible sensor element comprises an insulated cable having an elongate metal sheath enclosing an insulating material and conductive wires 9 running inside and substantially parallel to the longitudinal axis of the sheath. The wires are welded, brazed or soldered together at the distal end of the sensor element to define a single continuous conductive path running from the proximal end of the frangible sensor element to its distal end and then back to its proximal end. The cable may be mineral insulated and may contain two or four wires. Also disclosed is a method for making a frangible sensor.
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