Leak repairing method of phase connection lines of stator winding in turbonator

A steam turbine generator and connected wiring technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of inability to achieve good results, excessive heat dissipation of copper tubes, etc., to prevent missing welding and reduce coating Cost, the effect of improving environmental performance

CN105033422AActive Publication Date: 2015-11-11大唐桂冠合山发电有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-11-11

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Abstract

The invention discloses a leak repairing method of phase connection lines of a stator winding in a turbonator. The leak repairing method includes the steps that leak points are heated through two welding guns with the 180-degree inclined angle, meanwhile, the temperature is detected through a silver solder, when the silver solder is melting, the leak points are evenly coated with the silver welding powder, the silver solder is placed on the silver welding powder, welding-all-around is conducted on the leak points on the phase connection lines, and the surfaces of the welded parts are coated with the silver welding powder again 1-2 minutes after welding is completed, then the portions where plated silver is exfoliated are grinded through abrasive cloth to be smooth, the two welding guns with the 180-degree inclined angle heat the tin-enameled portions while the temperature is detected through tin bars, when the tin bars are melting, the tin-enameled portions are evenly coated with soldering paste so that immunities can be removed, and then the tin bars are boned onto the soldering paste. The leak repairing method is simple in operation, the workload of inspectors is lowered, and working efficiency is improved.
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Description

technical field

[0001] The invention relates to an air tightness and electric leakage detection method of a steam turbine. More specifically, the present invention relates to a method for trapping the connecting wires of stator windings in turbogenerators. Background technique

[0002] The No. 2 generator of Datang Guiguan Heshan Power Generation Co., Ltd. is a T225-460 turbogenerator. The generator is composed of a stator and end structural parts, a rotor, and a generator excitation device. The stator winding of the generator is directly cooled by deionized water with a pressure of 0.25MPa. The stator core and rotor winding are cooled by hydrogen gas with a pressure of 0.30MPa. The lubrication of the generator bearing is provided by the lubrication system of the steam turbine bearing.

[0003] The stator of the generator is composed of a machine base, an outlet cover, a hydrogen cooler, a stator core, a stator winding, and a stator lead wire. Deionized water flows in the ...

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Embodiment Construction

[0033] The present invention will be described in further detail below, so that those skilled in the art can implement it with reference to the description.

[0034] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0035] A method for repairing leaks in the connecting wires of the stator windings in a turbogenerator, the connecting wires pass through an insulating support and are connected to the high-voltage outlet sleeves, and the connecting wires are copper tubes with an insulating layer wrapped on the surface, characterized in that, Include the following steps:

[0036] Step 1. Welding treatment

[0037] Grind the area within 5-8cm around the leak point until it reveals metallic luster, then clean it with alcohol and dry it, heat the leak point with two welding torches with an included angle of 180°, and use a silver welding rod t...