Spectrum characteristic testing method for stator iron core clamping rings of generator
A technology of generator stator and spectrum characteristics, applied in the field of spectrum characteristics test, can solve problems such as affecting the safe production of power plants, large economic losses, etc., and achieve the effects of strong operability and practicability, improving design quality, and reducing process dispersion.
Active Publication Date: 2014-03-12
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology
If there is a problem in the verification, it must be returned to the factory for repair, which will affect the safe production of the power plant and cause large economic losses
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Embodiment Construction
[0019] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.
[0020] figure 1 It is a structural schematic diagram of a large turbogenerator stator core, supporting ribs and clamping rings. It is composed of stator core 1, clamping ring 2, supporting ring 3 and supporting ribs 4. There are four assembled clamping rings 2, each clamping ring The tight ring is welded by two single rings through the brace. When assembling according to the product manufacturing process, the stator core 1 and the supporting rib 4 are assembled vertically along the axial direction, the supporting rib 4 is set outside the stator core 1, and the clamping ring 2 is set outside the supporting rib 4 and coaxial with the stator core 1 Set up, each clamping ring 2 is butt-welded first, then the clamping ring 2 is welded with each support rib 4, and finally the support ring 3 is welded with the support rib 4, the main lo...
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The invention provides a spectrum characteristic testing method for stator iron core clamping rings of a generator. The method comprises the following steps: vertically assembling a stator iron core and support bars along an axial direction, arranging the support bars on the outer side of the stator core, arranging the clamping rings on the outer sides of the support bars and coaxially with the stator iron core, and performing butt welding on the clamping rings; ending welding of the clamping rings and the support bars, and turning to a horizontal position; testing the spectrum characteristics of testing points on the clamping rings by adopting modal testing equipment, wherein the testing points are positions where included angles of 40 degrees are formed between connecting lines of the left and right sides of the upper semicircles of the clamping rings and the circle centers of the clamping rings; judging whether the spectrum characteristics of the iron core clamping rings are qualified according to the evaluation standard of whether the spectrum characteristics of the iron core clamping rings are qualified. According to the method provided by the invention, the defects in the prior art are overcome, the reasonability of the design structures and the technical processes of the clamping rings can be verified, the design quality of a product is enhanced, and the process dispersity is lowered, so that the clamping rings are tightened in place along a radial direction, and the running requirements of the generator are met.
Description
technical field [0001] The invention relates to a frequency spectrum characteristic test method of a generator stator iron core clamping ring, and belongs to the technical field of generator structure characteristics. Background technique [0002] After the stacking of the stator core of a large generator is completed, the stator core needs to be radially fastened and fixed with a clamping ring. The radial fastening performance of the clamping ring structure will directly affect the performance and operational reliability of the stator core. If the clamping ring is directly tightened by bolts, it is easy to loosen after long-term operation, and needs to be checked and tightened during overhaul. If the clamping ring is permanently tightened directly after welding, it can be theoretically controlled by strict dimensional requirements. However, during the manufacturing process, due to a large number of welding, the clamping ring will experience deformation and shrinkage, which...
Claims
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IPC IPC(8): G01H17/00G01P15/00
Inventor 李治王庭山蔡忠吴洋海方超唐青
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD