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Method for determining noise abnormal part of steam turbine generator iron core

A turbo generator, noise technology, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve problems such as expansion, insulation damage, deformation, etc.

Active Publication Date: 2020-03-27
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since the core silicon steel sheet of the steam turbine generator is in the temperature field and electromagnetic field, it will expand, loosen, deform, etc. due to the long-term thermal effect and magnetic effect, and even cause serious failures such as insulation damage, iron core adhesion, and silicon steel sheet burning.

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  • Method for determining noise abnormal part of steam turbine generator iron core
  • Method for determining noise abnormal part of steam turbine generator iron core
  • Method for determining noise abnormal part of steam turbine generator iron core

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specific Embodiment approach

[0018] The present invention is aimed at the method of locating the abnormal part of the iron core by testing the sound pressure level A-weighted noise of the operating turbogenerator, finding the "local" and "point" with high noise of the iron core, and the specific implementation mode of the present invention Yes:

[0019] 1) Find and locate "local" high noise: press figure 1 , At a distance of 150cm vertically from the generator casing, divide the casing 1 where the iron core is installed into a grid of 50cm×50cm horizontally and vertically, such as figure 2 As shown, the sound pressure level A-weighted noise is tested at each intersection point in the grid. The sound pressure level A-weighted noise is to simulate the response of the human ear to a 40phon pure tone, and it has a relatively high impact on middle and low frequency sounds below 1kHz. Large attenuation, a noise weighting method that does not attenuate the high-frequency sound; decibel is the noise measurement...

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Abstract

The invention discloses a method for determining a noise abnormal part of an iron core of a steam turbine generator, which is used for positioning, diagnosing and analyzing the abnormal part of the iron core by testing the noise of an external shell, so as to provide a basis for the overhaul and maintenance of the iron core.

Description

Technical field: [0001] The invention aims at the method of determining the abnormal position of the iron core by testing the noise of the running steam turbine generator. Background technique: [0002] The iron core is one of the main components of a large turbogenerator, and it is the channel of the magnetic circuit of the generator. Many grooves are evenly distributed in the inner circle of the iron core to embed the stator winding, and there are dovetail grooves in the outer circle of the iron core to place positioning ribs to fix the iron core on the frame. The iron core is composed of several silicon steel sheets with a thickness of 0.35mm or 0.5mm. Each silicon steel sheet is coated with an insulating layer on both sides. The insulating layer insulates the silicon steel sheets from each other to reduce the eddy current in the iron core and avoid unnecessary magnetoelectric loss. [0003] Since the core silicon steel sheet of the steam turbine generator is in the temp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 苟智德李志和王彦滨魏长健马占华富立新靳颖胡金明贲喜鹏王韬李明宇高阳葛旭
Owner HARBIN ELECTRIC MASCH CO LTD