Method For Calculating Amount Of Change In Clearance Of Blade Ring And Method For Adjusting Position Of Blade Ring

Abstract: The present invention pertains to a method for calculating the amount of change in a clearance of a blade ring and a method for adjusting the position of the blade ring. This method for calculating the amount of change in a clearance of a blade ring calculates the amount of change in a clearance in a vertical direction between an inner peripheral surface of the blade ring and an outer peripheral surface of a rotary shaft disposed inside the blade ring, the blade ring having a ring shape being configured by connecting a blade ring upper half part and a blade ring lower half part. The method comprises: a step for acquiring a displacement amount in a horizontal direction of the blade ring between a first state in which the blade ring upper half part is connected to the blade ring lower half part and a second state in which the blade ring upper half part has been removed from the blade ring lower half part; a step for calculating a second neutral axis of the blade ring in the second state on the basis of the displacement amount; and a step for calculating the amount of change in a clearance between the first state and the second state by comparing a first neutral axis of the blade ring in the first state with the second neutral axis.

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