Airtight test structure and system of generator outlet bushing
A technology of outlet casing and air tightness test, which is applied in the testing of machine/structural components, fluid tightness testing, and liquid tightness measurement using liquid/vacuum degree, etc. It can solve the problem of increased air tightness test time and low efficiency , leaks, etc.
Active Publication Date: 2020-11-24
CHINA GENERAL NUCLEAR POWER OPERATION +2
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Problems solved by technology
[0004] Based on this, it is necessary to provide an airtight test method to solve the problem of increased airtight test time and low efficiency due to the leakage of the seal between the flange and the casing and the platen during the airtight test of the generator. Airtight test structure and system for generator outlet casing with short airtight test time and high efficiency
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[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.
[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "or / and" includes any and all combinations of one or more of ...
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The invention relates to an airtightness test structure and system for a generator lead-out bushing. The airtightness test structure comprises: a circular support arranged in a receiving cavity, wherein a gap is formed between the inner peripheral wall of the circular support and the lead-out bushing; a first seal ring arranged at the top of the circular support and used for sealing space betweenthe inner peripheral wall of the circular support and the lead-out bushing; a second seal ring arranged at the bottom of the circular support and used for sealing space between the bottom of the circular support and the receiving cavity. The airtightness test structure also comprises a gas injection port arranged in the top of the circular support, a gas outlet arranged in the inner peripheral wall of the circular support, and a gas injection passage that communicates the gas injection port and the gas outlet. The airtightness test structure and system for the generator lead-out bushing provide short test time and high test efficiency for generator airtightness test.
Description
technical field [0001] The invention relates to the field of airtight testing of generators, in particular to a structure and system for airtight testing of generator outlet bushings. Background technique [0002] Under normal circumstances, after the overall airtight test of the generator is required, the calculated overall gas leakage rate of the generator can be used normally. In the airtight test, 3 to 5 bar compressed air is injected into the assembled generator stator chamber, and the pressure is maintained for 24 hours. Due to the large internal volume of the stator bore of the generator, it generally takes several days to inflate and stabilize the pressure, which increases the difficulty of the airtight test. [0003] Generally, the generator includes a main body and a base plate supporting the main body, the outlet sleeve is passed through the base plate, and the connection between the outlet sleeve and the base plate is sealed by a flange. During the airtight tes...
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IPC IPC(8): G01M3/28
CPCG01M3/2815
Inventor 王建涛吴超房志强支永盛
Owner CHINA GENERAL NUCLEAR POWER OPERATION