Patent ID: 11859507
Assignee: GENERAL ELECTRIC COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. The method of claim 1, wherein the calculating the prediction offset value further includes:
with at least the upper casing removed from the lower casing in the top-off position:
identifying a first reference line through the third reference point and the fourth reference point of the HJ flange of the lower casing;
identifying a second reference line through a fifth reference point and a sixth reference point on a lower surface of the HJ flange of the upper casing, the fifth reference point aligned with the third reference point in the top-on position and the sixth reference point aligned with the fourth reference point in the top-on position;
establishing an angular relationship between the first reference line and the second reference line by superimposing the rotor axis of the HJ flange of the upper casing in the top-off position with the rotor axis of the HJ flange of the lower casing in the top-off position;
calculating any gap at an inner location near the third reference point and the fifth reference point, or an outer location near the fourth reference point and the sixth reference point based on the angular relationship between the first reference line and the second reference line and the inner radius of the lower casing;
calculating the prediction offset value for the component support position in the top-on position based on at least the first, second, third, fourth, fifth and sixth locations of the lower casing and any gap; and
adjusting the component support position in the turbine casing by the prediction offset value, wherein an alignment of the component positioned at the component support position is improved relative to the rotor axis upon replacing the upper casing to the top-on position.