Method for measuring and adjusting center of fixed part of water-turbine generator set

Abstract

The invention discloses a method for measuring and adjusting the center of a fixed part of a water-turbine generator set, which relates to the field of generators and comprises the following steps of S1, measuring the center of the fixed part, and suspending and adjusting a first piano wire to the center of a fixed leakage-proof ring by taking the center of the fixed leakage-proof ring as a reference, S2, measuring the average center, the roundness and the perpendicularity of the stator core, S3, checking the deviation value between the center of the fixed part and the average center of the stator core, and S4, hanging a second piano wire by taking the average center of the stator core as a reference center line according to the deviation value, and adjusting the fixed part by taking the second piano wire as a reference to enable the deviation between the center of the fixed part and the second piano wire to meet the standard requirement. The average center of the stator core is used as the adjustment reference of other fixed parts for adjustment, and a new center line is determined, so that the center of the water-turbine generator set meets the standard requirements, and the workload and the equipment and material cost of center adjustment of the set can be reduced; and risks of stator core out-of-round, local deformation, stator bar damage and the like generated when the center of the stator core is adjusted can also be avoided.

Description

technical field [0001] The invention relates to the field of generators, in particular to a method for measuring and adjusting the center of a fixed part of a hydroelectric generating set. Background technique [0002] The measurement and adjustment of the center of the hydroelectric generating unit is an important process in the process of unit installation, maintenance and technical transformation. The accuracy of its measurement and adjustment directly affects the installation and maintenance quality of the entire hydroelectric generating set. The usual or traditional method of measuring and adjusting the center of the fixed part of the Francis turbine generator set is: take the center of the turbine installation reference part (fixed leak-proof ring) as the reference, and hang a plumb line through the center of the unit installation reference part, so as to Baseline measurement and calculation of the center deviation of the stator, upper frame, lower frame, top cover or...

AI Technical Summary

Problems solved by technology

[0003] During the maintenance or technical renovation of the hydro-generator set, problems such as loosening and deformation of the stator core after the long-term operation of the generator, unqualified installation quality during power station construction, etc. are often encountered The center of the generator stator and the center of the turbine are not concentric or the concentricity is out of tolerance. When dealing with such problems, the usual or traditional method is to calculate the data of the generator stator center measured with an inner diameter micrometer by means of arithmetic, and then use The installation reference part of the turbine is the center of the fixed leak-proof ring as the reference, and the position of the stator is adjusted so that the deviation between the center and the center of the turbine reaches the acceptable range. Difficult, and the size of the stator is large, it is easy to produce irregular deformation during the adjustment process, resulting in worse roundness of the stator or damage to the insulation of the stator bar

In the calculation of the measurement data of the stator center, if the stator of the hydro-generator is out-of-round or deformed, more data is required to be measured, and the above-mentioned conventional measurement and calculation methods cannot accurately determine the center of the unit

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