Measuring the straightness of diaphragms and bearing journals

When measuring the straightness of diaphragms and bearing journals in a steam or gas turbine, the Turbine equipment (system E960) is used. The laser transmitter is mounted at one end of the turbine’s centre line (usually a bearing journal). The detector fixture is placed at each part of the diaphragm that has to be measured. The measurement values are recorded at three positions (9, 6 and 3 o’clock) by rotating the detector probe.

 

The measurement result displays the straightness of the bearing and the diaphragm’s centre line, both vertically and horizontally, compared with two zero (reference) points. The flatness of the parting surface is measured with laser D22 and detector E7. The measurement values are recorded at the marked points on the surface, after which three zero points are selected to which the flatness refers.

Measuring Bearing Journals and Diaphragms