A DEVICE FOR MEASURING CYLINDRICITY OF 250 MW, 500 MW STEAM TURBINE, HIGH (HP), INTERMEDIATE (IP) AND LOW PRESSURE (LP) SHAFTS AND TURBOGENERATOR ROTOR SHAFTS AND METHOD FOR THE SAME

摘要

A device for measuring cylindricity of 250 mw, 500 mw steam turbine, high (HP), intermediate (IP) and low pressure (LP) shafts and turbo generator rotor shafts consists of an inverted 'V' shaped block (1) having two holes (5, 2) in the middle of the block perpendicular to each other for holding a dial gauge (6) tightly. Hole (2) is a threaded hole for tightening the dial gauge. Two arms (3, 4) extending from the middle of the block (1) touches firmly the surface of the shaft and moves manually around the periphery of the shaft wherein the tip of the dial gauge (6) remains lightly pressed on the surface for showing the reading of error of cylindricity.