Steamship generator with rotor free cooling and stator evaporation cooling

Abstract

The utility model provides a steam turbo-generator having an air-cooled rotor and a vapor-cooled stator, which is characterized in that axial ventilation air cooling method is adopted to cool the rotor (20). All of air coolant enters a protective ring (60) arranged on one end of the rotor after being pressurized through fans (50) arranged on both ends of the rotor. The air coolant in the protective ring (60) flows in two ways. The air coolant in the first way cools winding coils on both ends, and enters a gap through radial ventilation holes (601) arranged on the protective ring (60). The air coolant in the second way directly enters a tube conductor (701) of the rotor, and flows axially. The axial-flow cooling blast passes through the middle of the rotor (20), then enters the gap through a radial wind path (80), and flows to one end and gathers with the air coolant which enters the gap through the protective ring (60), and then enters a cooler (110) through a duct (120) on the end. The cold air cooled through the cooler (110) enters the end of the steam turbo-generator through the duct (120). Efficiency of the invention is high; the structure is simple; utility model needs few auxiliary equipments, is conveineint to mount, runs safey and reliably, and can be free from maintenance generally.

Description

technical field [0001] The invention relates to a steam turbine generator, in particular to a steam turbine generator in which the stator is cooled by evaporative cooling technology and the rotor is cooled by air. Background technique [0002] The stator of the turbogenerator is cooled by evaporative cooling technology in two ways: full immersion evaporative cooling system and evaporative cooling system combining stator core immersion and forced circulation cooling in the winding. The stator of the evaporative cooling turbo generator injects a liquid medium with high insulation and low boiling point and good physical and chemical properties into the stator cavity. The cooling liquid absorbs heat, boils and vaporizes, then flows to the condenser, condenses into a liquid through the condenser, and then flows back to the stator cavity. . Evaporative cooling solves the cooling problem of the generator stator very well. Not only the temperature of the stator is low, but also the...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of complex manufacturing technology and high sealing requirements of existing evaporative cooling rotors and water-cooling rotors, and propose a turbogenerator with rotor air cooling and stator evaporative cooling

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