Demagnetization method for residual magnetism of generator turbine
A generator and demagnetization technology, applied in the direction of circuits, magnetic objects, electrical components, etc., can solve problems such as difficult and fast processing, and achieve the effect of increasing cost, good effect and fast speed
Pending Publication Date: 2022-06-24
CHONGQING IRON & STEEL CO LTD
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Problems solved by technology
[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a method for demagnetizing the residual magnetism of the generator turbine, which is used to solve the problem in the prior art that the residual magnetism of the turbine rotor of the generator is difficult to deal with quickly on site
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[0024] The embodiments of the present invention are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0025] It should be noted that the structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the implementation of the present invention. Restricted conditions, it does not have technical substantive significance, any structural modification, proportional relationship change or size adjustment, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the present invention. The disclosed technical content must be within the scope of coverage. At the same tim...
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The invention provides a generator turbine residual magnetism demagnetization method which is used for eliminating residual magnetism of a generator turbine and comprises the steps that a direct-current demagnetization method and an alternating-current demagnetization method are adopted to demagnetize a magnetized part of the generator turbine, the magnetized part comprises a rotor body, rotor blades and a shaft part, the rotor body is demagnetized through the direct-current demagnetization method, and the rotor blades are demagnetized through the alternating-current demagnetization method. And the rotor blades and the shaft part are demagnetized through an alternating current demagnetization method. According to the method, demagnetization work can be carried out on different parts of the turbine rotor, generator turbine residual magnetism demagnetization work can be rapidly and conveniently carried out on the production site, demagnetization work can be completed within a short time, the speed is high, the effect is good, cost is not increased, and meanwhile the unit overhaul construction period is not affected.
Description
technical field [0001] The invention belongs to the technical field of generator equipment, and in particular relates to a method for demagnetizing the residual magnetism of a generator turbine. Background technique [0002] After the turbine rotor or other components of the generator have been running for a period of time, once the residual magnetic strength of the generator reaches more than 10 Gauss, it may cause increased vibration of the shafting, serious heating of the large shaft, re-burning of the bearing bush or electrical burn of the journal, etc., which may seriously affect the unit. When the operation occurs, in order to ensure the safe operation of the unit, it is often necessary to demagnetize the turbine rotor of the generator. Demagnetization (or demagnetization) is to use the external demagnetization magnetic pole overlap change and the magnetic field intensity decreasing change to disrupt the magnetic domain arrangement of the components to be demagnetized,...
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IPC IPC(8): H01F13/00
CPCH01F13/006
Inventor 赵伟谭海波傅斌童毅冯彦唐红军冯庆科
Owner CHONGQING IRON & STEEL CO LTD