Jacking extension device for spring assemblies of steam turbine generator

Abstract

The invention belongs to the technical field of mechanical design, and particularly relates to a jacking extension device for spring assemblies of a steam turbine generator. The jacking extension device comprises an oil pressure supply device, a high-pressure hose and a jacking extension mechanism, wherein the oil pressure supply device is connected with one side of the high-pressure soft side through a quick connector; and the other side of the high-pressure hose is connected with an oil-inlet nut in the jacking extension mechanism, and a sealing gasket is installed between the high-pressurehose and the jacking extension mechanism for sealing. By utilizing the limited space between the spring assemblies and a pressing ring, release of the elastic performance of springs is achieved, so that the purpose of repairing the spring assemblies of all areas at the end part of the generator is achieved.

Description

technical field [0001] The invention belongs to the technical field of mechanical design, and in particular relates to a spring assembly jacking device of a steam turbine generator. Background technique [0002] During the operation of the generator, due to the interaction between the stator winding current and the end leakage magnetic field, a large double frequency vibration force will be generated. Therefore, a spring assembly structure is designed at the end of the stator of the generator to buffer and release the vibration stress between the stator pressure ring, cone ring and other components. [0003] The generator set of a nuclear power plant produced TBB-1000-2y3 turbogenerators for the Russian power plant. Due to its inherent design and manufacturing defects, the natural frequencies of the elliptical vibration modes at the ends of the stators of the two generators were unqualified. It has always been between 107-109Hz. Just because the stator has a natural frequen...

AI Technical Summary

Problems solved by technology

However, due to structural limitations, the windshield cannot be removed in some areas, and the top screw hole area is not accessible (Note: some stator components are installed after the spring assembly is installed in the generator manufacturing stage, and the manufacturer’s design does not consider the spring assembly in some areas during the maintenance stage. repair)

Therefore, there are many restrictions on the use of traditional technology, and there are technical deficiencies that cannot repair all spring components.

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