Aligning the steam turbine rotor
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When aligning the turbine rotor, is it necessary to have the rotor in close contact with the main load-bearing surface of the thrust bearing? Please advise
When using two gauges to determine concentricity, it is necessary to lift the rotor at one end so that the shaft offset can be accounted for; otherwise, the value shown by the gauge measuring axial runout will be the sum of the axial deviation and the shaft offset. The value of the serial axis can be any value between 0 and the maximum serial amount. If 3 tables are used, then it’s not necessary. One is machined radially, and the other two are machined axially, at 180 degrees to each other. In this way, two pieces are measured axially, with one being used to measure the axial deviation. What is measured in one unit is the shaft alignment value.