A method for disassembling and assembling a blade-type high-pressure fan of a turbogenerator

Abstract

The invention belongs to the technical field of turbogenerator maintenance, and in particular relates to a method for disassembling and assembling a vane-type high-pressure fan of a turbogenerator. The removal method of the turbogenerator vane-type high-pressure fan includes: removing the upper fan cover; installing the fan cover disassembly ring and sliding gasket; rotating the remaining fan cover clockwise to make the left fan cover, the lower fan cover and the right Put the flap fan cover directly above and remove it; remove the special tool; remove all moving fan blades. The installation method of the turbogenerator vane-type high-pressure fan includes: installing all moving fan blades; installing the fan cover disassembly ring and sliding gasket; installing the left fan cover, the lower fan cover and the right fan cover in sequence, And every time a fan cover is installed, rotate 90° clockwise; remove the special tool; install the upper flap fan cover directly above. The method of the invention can simplify the disassembly and assembly operation process of the blade type high-pressure fan, and effectively improve the disassembly and assembly efficiency of the high-pressure fan.

Description

technical field [0001] The invention belongs to the technical field of turbogenerator maintenance, and in particular relates to a method for disassembling and assembling a vane-type high-pressure fan of a turbogenerator. Background technique [0002] At present, in the internal cooling system of the turbogenerator at home and abroad, the high-pressure fan is used as the power source for the internal cooling of the generator, so that the internal cooling medium of the generator generates a higher pressure, thereby realizing the internal circulation cooling function of the internal cooling system of the generator, driving The cooling medium cools the stator winding, stator core, rotor winding, rotor core and other parts of the generator to ensure the normal operation of the turbo generator. The high-pressure fan is composed of a certain number of moving blades on the fan seat ring and four-petal high-pressure fan cover, including the upper fan cover, the right fan cover, the l...

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the small gap between the fan cover and the fan seat ring of the high-pressure fan, when the special tool for turning the fan cover is put in, it needs to be adjusted several times with other auxiliary tools before it can be put in, and two pieces of fan cover disassembly rings need to be installed. It takes a long time to install, resulting in low efficiency of turbogenerator maintenance;

[0005] (2) During the disassembly and assembly of the high-pressure fan, the generator rotor needs to be rotated several times, and there is a greater risk of mechanical injury to maintenance personnel and damage risks to important components, such as moving fan blades and static fan blades;

[0006] (3) The rotor of the generator needs to be operated by the crane of the steam turbine workshop. During the overhaul period, it belongs to the main maintenance line of the steam turbine workshop. The maintenance efficiency of the steam turbine generator set is low, which seriously delays the overhaul period;

[0007] (4) The generator rotor has a large number of moving fan blades. Currently, 1 / 4 partitions are used as the basic unit for disassembly and assembly, and there is a high risk of foreign objects falling into the high-pressure fan during disassembly.

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