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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

Active Publication Date: 2020-08-21
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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  • Method for centering roundness measuring frame of vertical shaft umbrella type hydro-generator rotor
  • Method for centering roundness measuring frame of vertical shaft umbrella type hydro-generator rotor
  • Method for centering roundness measuring frame of vertical shaft umbrella type hydro-generator rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Before the cranking of the unit, carry out the speed change test of the unit, and record the air gap data of the generator stator and rotor 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 generator stator and rotor, 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 of the generator stator and rotor; 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 basis for alignment based on the installation center of the lower guide bearing measured by the cranking of the unit is accurate before starting the following operations.

[0024] (1) Carry out cranking of the unit before dismantling, measure the installation cente...

Embodiment 2

[0032] (1) The air gap data of the generator rotor in the online monitoring system when the unit is running and the speed range is 0-10 r / min is compared with the manually measured data when the unit is overhauled and cranked, and the calibration is normal. 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) It is measured by hanging the piano wire 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, -0.04mm in the +Y direction);

[0035] (4) According to the superposition calculation, the upper flange of the generator is offset by 0.02mm in the +Y direction relative to the rotation center of the lower guide bearing during operati...

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Abstract

The invention discloses a method for centering a roundness measuring frame of a vertical shaft umbrella type hydro-generator rotor, and the method comprises the steps: measuring a lower guide bearinginstallation center during turning, and determining the offset distance of the rotation center of a lower guide bearing in a certain direction relative to the lower guide bearing installation center;measuring and calculating the offset distance of an upper flange of the generator rotor relative to a lower flange of the generator rotor in a certain direction; superposing the obtained results to obtain the offset distance offset X of the upper flange of the generator rotor relative to the rotation center of the lower guide bearing in one direction M during operation; and finally, by taking thecenter of the flange on the generator rotor as a reference, when the rotor roundness measurement frame is mounted, moving X towards the -M direction to complete reference adjustment of the rotor roundness measurement frame. According to the invention, the excircle of a rotor magnetic pole in the operation of a hydro-generator is consistent with the actual rotation center of the hydro-generator, the uneven air gap between the stator and the rotor and unbalanced magnetic pull are reduced, the horizontal vibration of the generator stator is reduced, and the safe and stable operation after unit repair is ensured.

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 circular frame of a rotor of a vertical shaft umbrella type hydroelectric generator. Background technique [0002] In the process of adjusting the roundness of the rotor during the overhaul of the vertical shaft umbrella hydro-generator, it is necessary to align the center of the rotor measuring frame first, and then adjust the roundness of the rotor magnetic poles to the standard range based on the measurement data of the measuring frame. [0003] In the prior art, after the rotor of the hydro-generator is hoisted out of the machine pit, the center of the rotor measuring circle frame is aligned with the center of the lower flange of the rotor center body as the reference, that is, the center of the lower flange of the rotor center body and the base of the rotor measuring circle frame After the center i...

Claims

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Application Information

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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
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