Method and apparatus for axially aligning the coupled shafts of

Details Method and apparatus for axially aligning the coupled shafts of Method and apparatus for axially aligning the coupled shafts of

1984-04-27

1985-09-03

Ciarlante, Anthony V.

Measuring and testing

Simulating operating condition

Marine

33181R, G01M 1900

Patent

active

045384550

ABSTRACT:
A method and apparatus for axially aligning axially coupled shafts of a steam turbine includes means for changing the elevation of the outboard end of each shaft. The outboard end of each shaft is rotatably supported by a bearing above a turbine foundation. Means is included for measuring the supporting force at the bearing. A strain gauge is disposed on the surface of each shaft which provides an output signal indicative of the degree of bending of that shaft. The apparatus includes means for comparing and minimizing the output signals of the strain gauges by affecting the means for changing the elevation and comparing the resultant output signals at different levels of elevation. The method for axially aligning two axially coupled shafts includes measuring the degree of bending on the surface of the shaft, changing the elevation of the outboard end of each shaft, measuring the supporting force at each bearing at each outboard end of the shaft, comparing the signals representative of the bending at different levels of elevation, minimizing the signals, and repeating the step of changing the elevation and the step of comparing the signals, and recording the supporting forces during the minimization step to obtain the optimal axial alignment of the axially coupled shafts.

REFERENCES:
patent: 4033042 (1977-07-01), Bently
patent: 4115925 (1978-09-01), Malak
patent: 4428126 (1984-01-01), Banks

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