An air-cooled turbogenerator shaft seal system

Abstract

The invention discloses an air-cooled turbogenerator shaft seal system, belonging to the technical field of generator shaft seal systems, comprising an end cover and a rotor, the end cover is connected with a ring, and the ring is connected with a windshield ring; the ring There is a ring groove on the edge of the inner ring, the ring groove is embedded with the wind-shielding ring group I, and the ring foot of the wind-shielding ring is embedded with the wind-shielding ring group II; the inner wall of the wind-shielding ring group I Grooves are respectively arranged on the inner walls of the windshield ring group II, and an air seal is installed in the groove; the ring, the windshield ring, the windshield ring group I, the windshield ring group II, the air seal and the rotor are formed An air cavity, the air cavity is communicated with an air pressure detection device and an air pressure adjustment device. The invention can replace the shaft sealing ring and build an air wall for the generator, and the installation requirements are looser than that of the shaft sealing ring, which can reduce the abrasion of the rotor, and has good sealing effect and safe and reliable operation.

Description

technical field [0001] The invention relates to the technical field of generator shaft seal systems, in particular to an air-cooled turbogenerator shaft seal system. Background technique [0002] The air-cooled generator uses closed circulating air as the cooling medium, and is mainly composed of a stator, a rotor, a fan that rotates with the rotor, and a shaft seal ring. Since the inner side of the shaft seal ring is located in the air low-pressure area, when the generator is running, the external air will carry impurities and be sucked into the generator, which will pollute the internal environment of the generator, affect its normal operation, and even cause damage to the generator. [0003] In order to avoid the entry of external impurities, the usual method is to minimize the fit gap between the shaft seal ring and the rotor, but this method will not only increase the difficulty of installing the shaft seal ring, but also cause the gap between the shaft seal ring and th...

AI Technical Summary

Problems solved by technology

Since the inner side of the shaft seal ring is located in the air low-pressure area, when the generator is running, the external air will carry impurities and be sucked into the generator, polluting the internal environment of the generator, affecting its normal operation, and even causing damage to the generator

[0003] In order to avoid the entry of external impurities, the usual method is to minimize the fit gap between the shaft seal ring and the rotor, but this method will not only increase the difficulty of installing the shaft seal ring, but also cause the gap between the shaft seal ring and the rotor to be too small. Friction is generated, which increases the wear of the rotor, and from the perspective of actual operation, the effect of this sealing structure is not very good

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