TEMPERATURE MEASUREMENT DEVICE FOR ROTARY MACHINE

PROBLEM TO BE SOLVED: To provide a temperature measurement device for a rotary machine capable of measuring the temperature of a rotary member 1a even without the adoption of a complicated structure using a slip ring etc.SOLUTION: In a temperature measurement device for a rotary machine, a pair of encoders 9a, 9b is installed on the outer circumferential surface of a rotary member 1a while being spaced from each other in the axial direction, and the detection sections in sensors 11a, 11b are faced to detected surfaces 10a, 10b formed on the outer circumferential surface of both the encoders 9a, 9b respectively. One encoder 9a of both the encoders 9a, 9b is supported and fixed on the rotary member 1a. Also, the other encoder 9b is supported through a rolling bearing 12 on the rotary member 1a in a rotatable manner relative to the rotary member 1a. Both the encoders 9a, 9b are connected by a thermal deformation member 15 which varies a length dimension thereof in the circumferential direction thereof in accordance with variations in temperature.