Method for centering roundness measuring frame of vertical shaft umbrella type hydro-generator rotor
A technology for hydroelectric generators and generator rotors, which can be used in hydroelectric power generation, manufacturing of motor generators, and mechanical measuring devices. It can solve problems such as uneven air gaps, reduce horizontal vibration, ensure safe and stable operation, and reduce air pollution. Gap inhomogeneity and the effect of unbalanced magnetic pull
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[0022] Example 1
[0023] Before cranking the unit, carry out the unit conversion speed test, and record the generator stator and rotor air gap data of the unit when the speed range is 0-10r / min. The generator stator and rotor air gap data is measured and calculated by the conventional method using sensors. The distance between the rotors; during the overhaul of the unit, the air gap data of the generator stator and rotor is manually measured, that is, the minimum distance measured between the protruding position of the rotor magnetic pole and the stator is used as the generator stator and rotor air gap; The comparison and verification of the air gap data of the stator and rotor of the secondary generator is normal, indicating that the results of the two measurement methods are valid, and the correct data is based on the lower guide bearing installation center measured by the cranking of the unit. Then start the following operations.
[0024] (1) Before disassembling the machine, p...
Example Embodiment
[0031] Example 2
[0032] (1) The air gap data of the generator rotor in the online monitoring system under the operating state of the unit and the speed range of 0-10 r / min is compared with the data manually measured during the overhaul state of the unit and during cranking. Follow-up;
[0033] (2) Calculated from the barring data, when the unit rotates, the rotation center of the lower guide bearing is offset from the installation center of the lower guide bearing (that is, the center of the lower flange of the generator rotor) to the +Y direction by 0.06mm;
[0034] (3) Measured by the method of hanging the piano wire, the upper flange of the generator rotor is offset by 0.04mm in the -Y direction relative to the lower flange of the generator rotor (that is, -0.04mm in the +Y direction);
[0035] (4) Superposition calculation shows that the upper flange of the generator is offset from the rotation center of the lower guide bearing by 0.02mm in the +Y direction during operation;
[0...
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