Low-pressure steam turbine end steam seal corrugated joint supporting device and method

Abstract

The invention belongs to the technical field of steam turbine generator unit installation and maintenance, and particularly relates to a low-pressure steam turbine end steam seal corrugated joint supporting device and method. The device comprises a main supporting frame, an upper frame, a movable border, a corrugated joint anti-shaking jackscrew, universal wheels and a corrugated joint anti-shaking bottom plate, wherein the upper portion of the main supporting frame is connected with the upper frame, the side face of the upper frame and the movable border are connected into a whole, an upper transverse rod of the upper frame is connected with the corrugated joint anti-shaking bottom plate, the corrugated joint anti-shaking bottom plate is connected with the corrugated joint anti-shaking jackscrew, and the universal wheels are installed at the bottom of the main supporting frame. By means of the low-pressure steam turbine end steam seal corrugated joint supporting device and method, the maintenance manner of a steam turbine rotor is changed, the pumping-through operation of a corrugated joint is avoided, the maintenance period can be remarkably shortened, the working efficiency is improved, and meanwhile, the safety risk caused by the fact that the low-pressure rotor is in a hoisting state for a long time is eliminated.

Description

technical field [0001] The invention belongs to the technical field of installation and maintenance of steam turbine generator sets, and in particular relates to a support device and method for a bellows joint at the end of a low-pressure steam turbine. Background technique [0002] Low-pressure steam turbines, especially low-pressure steam turbines for nuclear power plants, have low steam parameters and large rotor size and weight, making hoisting difficult and risky. The bellows at the end of the low-pressure steam turbine is installed between the low-pressure outer cylinder and the bearing housing to absorb the deformation of the low-pressure outer cylinder and ensure that the deformation of the low-pressure outer cylinder will not be transmitted to the bearing housing. The bellows section is designed as a full circle and is fitted on both ends of the low pressure rotor. During the overhaul of the low-pressure steam turbine, since the maintenance of the low-pressure roto...

AI Technical Summary

Problems solved by technology

The work process is complicated, the workload is heavy, and improper operation will cause damage to the rotor wheel and bellows, and because the rotor (with a total weight of more than 200t) is in the hoisting state for a long time, the safety risk is relatively large

[0004] Similarly, due to the pumping operation of the steam seal bellows at the end of the steam turbine, special slide rails must be designed for the rotor-specific lifting beam, which reduces the safety factor of the lifting beam. Such a lifting beam is more difficult to operate than a general-purpose lifting beam. , a greater security risk

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