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A method for aligning the center of the rotor of a vertical shaft umbrella hydro-generator rotor

A technology for hydro-generators and generator rotors, which is applied in the fields of hydropower generation, manufacturing of motor generators, and mechanical measuring devices, can solve problems such as uneven air gaps, reduce horizontal vibration, ensure safe and stable operation, and reduce air The phenomenon of uneven gap and the effect of unbalanced magnetic pull

Active Publication Date: 2022-07-12
HUANENG LANCANG RIVER HYDROPOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a method for aligning the center of the round frame of the rotor of the vertical shaft umbrella type hydro-generator. The center of rotation of the lower guide bearing and the upper flange of the generator rotor are measured and calculated by the cranking of the unit. The center offset value is used as the distance value of the offset center when installing the rotor measuring circle frame, which is used to solve the problem that the center of the rotor measuring circle frame is aligned with the lower flange of the rotor center body. Technical problems that will cause uneven air gap between stator and rotor of generator

Method used

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  • A method for aligning the center of the rotor of a vertical shaft umbrella hydro-generator rotor
  • A method for aligning the center of the rotor of a vertical shaft umbrella hydro-generator rotor
  • A method for aligning the center of the rotor of a vertical shaft umbrella hydro-generator rotor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Before the unit is cranked, carry out the unit speed change test, and record the generator stator and rotor air gap data of the unit when the speed range is 0-10r / min. The distance between the rotors; during the maintenance of the unit, manually measure the air gap data of the stator and rotor of the generator, that is, the minimum distance measured between the protruding position in the middle of the rotor magnetic pole and the stator is used as the air gap between the stator and rotor of the generator; when the two 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 data base of the alignment of the lower guide bearing installation center measured by the unit cranking is accurate, and then the following operations are started.

[0024] (1) Before disassembling the machine, crank the unit, measure the installation center of the lowe...

Embodiment 2

[0032] (1) When the unit is running and the speed range is 0-10 r / min, the air gap data of the generator rotor in the online monitoring system is compared with the data measured manually when the unit is overhauled and cranking. Follow-up;

[0033] (2) Calculated from the cranking data, when the unit rotates, the rotation center of the lower guide bearing is offset by 0.06mm in the +Y direction relative to the installation center of the lower guide bearing (that is, the center of the lower flange of the generator rotor);

[0034] (3) Using the method of hanging a piano wire, it is found that 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, it is offset by -0.04mm in the +Y direction);

[0035] (4) The superposition calculation shows that the upper flange of the generator is offset in the +Y direction by 0.02mm relative to the rotation center of the lower guide bearing during operation;...

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Abstract

The invention discloses a method for aligning the center of a rotor of a vertical shaft umbrella-type hydro-generator rotor. The installation center of the lower guide bearing is measured during cranking, and the rotation center of the lower guide bearing is determined relative to the installation center of the lower guide bearing. Then measure and calculate the offset distance of the upper flange of the generator rotor relative to the lower flange of the generator rotor in a certain direction; superimpose the obtained results to obtain the upper flange of the generator rotor in operation. The offset distance in one direction M is offset by X relative to the rotation center of the lower guide bearing; finally, taking the center of the upper flange of the generator rotor as the benchmark, when installing the rotor circular measuring frame, move X in the direction of M to complete the rotor circular measuring Frame base adjustment. The invention keeps the outer circle of the rotor magnetic pole in the operation of the hydro-generator consistent with the actual rotation center of the hydro-generator, reduces the uneven phenomenon of the air gap between the stator and the rotor and the unbalanced magnetic pulling force, reduces the horizontal vibration of the generator stator, and ensures that the unit is repaired. Safe and stable operation.

Description

technical field [0001] The invention belongs to the technical field of hydropower production and operation, and in particular relates to a method for aligning the center of a rotor measuring circle of a vertical-shaft umbrella-type hydro-generator. Background technique [0002] In the process of adjusting the rotor roundness during the overhaul of the vertical shaft umbrella hydro-generator, it is necessary to align the center of the rotor circular measuring frame first, and then adjust the rotor magnetic pole roundness to the standard range based on the measurement data of the circular measuring frame. [0003] In the prior art, after the rotor of the hydro-generator is lifted out of the pit, the center of the rotor circular measuring frame is aligned with the center of the lower flange of the rotor central body as the benchmark, that is, the center of the lower flange of the rotor central body and the base of the rotor circular measuring frame After centering, install the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/00H02K15/16G01B5/252
CPCH02K15/0006H02K15/16G01B5/252Y02E10/20
Inventor 乔进国赵晓嘉钟苏徐德新刘啟文曾阳麟吴封奎聂治学叶超蔡朝东周天华
Owner HUANENG LANCANG RIVER HYDROPOWER