Alignment process of steam turbine and centrifugal compressor couplings
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How does a steam turbine determine the initial axial position before alignment, that is, to which side in the axial direction should the turbine shaft be moved? Similarly, what should be the axial position of a centrifugal compressor before alignment? Thank you.
Using the three-table alignment method, no matter how the axis shifts, it does not affect the results.
First, you need to push the rotor of the driving machine and the driven machine separately toward the working side, then measure the shaft end distance. Once this distance meets the design requirements, alignment can be carried out. When using two or three gauges for alignment, there are gauges positioned axially that can detect any axial movement, which will not affect the proper alignment process.
Thank you! May I ask if by the working side you mean the suction side of the steam engine and the first-stage suction side of the centrifugal compressor?
Wrong, it should be the discharge side of the steam engine, and the suction side of the compressor. The axial thrust of the steam engine is directed toward the discharge side ； The axial thrust of the compressor points toward the primary suction side.
Should the total axial displacement of the steam engine be determined first before alignment, and then the axis be placed in the middle after dividing that value by 2?； Then place the centrifugal compressor at the center of the total axial play, ensuring that the axial distance is equal to the length of the coupling. Align it again.