| 摘要 |
PROBLEM TO BE SOLVED: To provide a shaft bearing monitoring system, a rotary machine and a shaft bearing monitoring method that can accurately grasp a shaft center position of a rotary shaft more than ever.SOLUTION: The shaft bearing monitoring system is configured to include: a rotary shaft 2; a shaft bearing part 3 that supports an outer periphery surface 2a of the rotary shaft 2; a position detection part 6 that detects at least three positions of the outer periphery surface 2a of the rotary shaft 2; and a control device 12 that calculates a radius of the rotary shaft 2 on the basis of an input from the position detection part 6, calculates a thermal expansion amount of the rotary shaft 2 by a difference between a value of the radius upon operation and a value of the radius upon stoppage and calculates a movement amount in a vertical direction of the rotary shaft 2 from a difference between the thermal expansion amount and the input from the position detection part 6. |
