Axial center alignment method for steam turbine

Abstract

The invention discloses an axial center alignment method for a steam turbine, and the method comprises the following steps: S1, collecting circumference values and end face values of all pair wheels; S2, importing axial design data; S3, designing an axial center alignment calculation interface; S4, enabling an output region with an input region and an adjustment region to be correlated through a computational formula, and enabling a conclusion region to be used for listing logic relations of openings and circumferences of all pair wheels with all pair wheel values corresponding to the output region; S5, adjusting a bearing bush value in the adjustment region so as to eliminate an axial center error; S6, recording the adjustment values of all bearing bushes when the axial center error is less than an axial center error critical value; S7, adjusting all bearing bushes according to the recorded adjustment values of all bearing bushes, thereby completing the axial center alignment. The method builds a new axial center alignment platform to improve the axial alignment efficiency through employing axial center alignment calculation software, greatly saves the labor and time, is high in efficiency, and is quick and convenient.

Description

technical field [0001] The invention relates to an alignment method, in particular to an alignment method for the shafting center of a steam turbine. Background technique [0002] With the more commissioning and overhaul of the million steam turbine units, the alignment of the shaft system is more complicated. The entire shaft system of the 1000MW unit consists of 4 steam turbine rotors and 1 generator rotor, a total of 5 rotors and 4 wheel couplings. Shaft alignment is cumbersome, complicated and time-consuming. The alignment and adjustment of the center of the steam turbine shaft system is very important in the whole overhaul process and requires fine work. The accuracy of the alignment of the shafting directly affects the vibration of the shafting and thus the safe operation of the unit. [0003] In the past maintenance process, regardless of the size of the unit, the alignment of the shafting was generally done through a large number of manual calculations to determine...

AI Technical Summary

Problems solved by technology

[0003] In the past maintenance process, regardless of the size of the unit, the alignment of the shafting was generally done through a large number of manual calculations to determine an adjustment plan, and then adjusted and measured again and again, so that the adjustment results gradually reached the deviation allowable value of the alignment wheel center, so consumes a lot of time and manpower

Under normal circumstances, it takes three days to complete. If the calculation is inaccurate or the actual operation is inaccurate, it may take about five days to complete the alignment of the shafting

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