Abstract: A steam turbine includes a rotary shaft, a blade provided on an outer peripheral surface of the rotary shaft, a casing covering the rotary shaft and the blade from an outer peripheral side, a vane provided on an inner peripheral surface of the casing, and a seal device including a seal ring provided between the outer peripheral surface and the vane and a position adjusting portion configured to adjust a position of the seal ring in a radial direction. A seal clearance adjusting method includes a measurement step of measuring a length of the seal ring in the radial direction from a predetermined reference position as a reference length, a preparation step of preparing an unused seal ring, and an adjustment step of adjusting a length of the unused seal ring from the reference position to be the reference length by the position adjusting portion.

Abstract: In an assembly method for a turbine, measured shape data is acquired by measuring a shape for each of a plurality of casing components in a state in which the plurality of casing components are not fastened to each other. self-weighted state shape data, which is shape data when self-weight is applied, is created for each of the plurality of casing components. A reference shape model is corrected based on a difference between the measured shape data of a target measurement part and the self-weighted state shape data of the target measurement part. By using the corrected shape model, fastened state shape data, which is shape data in a state in which the plurality of casing components are fastened to each other, is estimated for each of the plurality of casing components.

Abstract: This fin tip position measurement method comprises: a jig installation step for installing a jig having a flat measurement surface expanded in a circumferential direction and an axial direction to a tip of at least one among a plurality of seal fins that protrude in a radial direction with respect to an axial line, extend in the circumferential direction, and are arranged in a direction in which the axial line extends; a first measurement step for measuring a distance from the axial line to the measurement surface by scanning the measurement surface with a laser beam; and a first calculation step for calculating a distance from the axial line to the tip of the seal fin by adding a radial dimension of the jig to the distance to the measurement surface.

Abstract: Provided is a measuring device for measuring the hardness of a rotor blade groove. This measuring device comprises: a hardness meter for measuring hardness; an actuator that presses the hardness meter to an object to be measured; a camera for capturing an image of a measurement range in the object to be measured by the hardness meter; a movement mechanism for moving the hardness meter and the camera to a desired position within the measurement range; and a fixing member for fixing the movement mechanism to the object to be measured.

Abstract: A steam turbine includes a rotary shaft, a blade provided on an outer peripheral surface of the rotary shaft, a casing covering the rotary shaft and the blade from an outer peripheral side, a vane provided on an inner peripheral surface of the casing, and a seal device including a seal ring provided between the outer peripheral surface and the vane and a position adjusting portion configured to adjust a position of the seal ring in a radial direction. A seal clearance adjusting method includes a measurement step of measuring a length of the seal ring in the radial direction from a predetermined reference position as a reference length, a preparation step of preparing an unused seal ring, and an adjustment step of adjusting a length of the unused seal ring from the reference position to be the reference length by the position adjusting portion.

Abstract: In assembling a turbine including: a casing consisting of an upper half part and a lower half part fastened together by bolts; a stationary body accommodated in the casing and supported by the lower half part; and a rotary body supported by a plurality of bearings so as to be situated on the inner side of the stationary body, there are executed: a procedure of reading a finite element model of the three-dimensional configuration of the turbine; a reading procedure of reading actual measurement information on the three-dimensional configuration of the upper half part and the lower half part of the casing in the open state; a model correction procedure of reflecting actual measurement information of an evaluated portion that is a specific part of the casing in the finite element model and generating a correction model obtained through correction of the finite element model; a deformation amount estimation procedure of estimating the movement amount of the evaluated portion generated when the upper half part and

Abstract: The invention is directed to maintaining the accuracy in the positional adjustment of a stationary part while shortening a turbine assembly period through the omission of the temporary assembly of a casing.

Abstract: A turbine assembly method includes a positional information measurement process in which positional information on a plurality of specific portions set on an outer surface of a casing is measured in a state before releasing of bolt fastening of the casing at a time of disassembly of the turbine and in a predetermined disassembly state after the releasing of the bolt fastening, and an alignment process in which positional adjustment of a stationary component with respect to the casing is made based on the measurement results of the positional information on the specific portions in the positional information measurement process.

Abstract: In assembling a turbine including: a casing consisting of an upper half part and a lower half part fastened together by bolts; a stationary body accommodated in the casing and supported by the lower half part; and a rotary body supported by a plurality of bearings so as to be situated on the inner side of the stationary body, there are executed: a procedure of reading a finite element model of the three-dimensional configuration of the turbine; a reading procedure of reading actual measurement information on the three-dimensional configuration of the upper half part and the lower half part of the casing in the open state; a model correction procedure of reflecting actual measurement information of an evaluated portion that is a specific part of the casing in the finite element model and generating a correction model obtained through correction of the finite element model; a deformation amount estimation procedure of estimating the movement amount of the evaluated portion generated when the upper half part and

Abstract: The invention is directed to maintaining the accuracy in the positional adjustment of a stationary part while shortening a turbine assembly period through the omission of the temporary assembly of a casing.

Abstract: A turbine assembly method includes a positional information measurement process in which positional information on a plurality of specific portions set on an outer surface of a casing is measured in a state before releasing of bolt fastening of the casing at a time of disassembly of the turbine and in a predetermined disassembly state after the releasing of the bolt fastening, and an alignment process in which positional adjustment of a stationary component with respect to the casing is made based on the measurement results of the positional information on the specific portions in the positional information measurement process.