Alignment Method of Generator Pumping Through Rotor

Abstract

The invention relates to a generator pumping through rotor centering method. The method comprises steps that a, a center of a stator bore is determined, a centering line is marked on the ground or an exciter platform in an orthographic projection mode according to a center line of the stator bore, and the centering line is on the pumping through stroke of a rotor; b, a centering rod is fixed on a rotor excitation end, and the centering rod is on a vertical plane passing through the center line of the rotor; and c, in a rotor pumping through process, according to the relative position of the centering rod and the centering line, the direction of the rotor is adjusted, the rotor is observed from a generator excitation side to a steam side, if the centering rod is at a right side of the centering line, the rotor is pushed leftwards slowly, if the centering rod is at a left side of the centering line, the rotor is pushed rightwards slowly, and the centering rod is guaranteed to just point to the centering line when the rotor moves forwards or backwards. The method is advantaged in that a problem of stator-rotor bumping risks caused by supporting the rotor carried out by excitation side personnel and frequent communication among workers in the stator bore in the rotor pumping through process can be avoided, and work efficiency is improved.

Description

technical field [0001] The invention relates to the installation technology of a large generator, in particular to a centering method for a generator pumping through a rotor. Background technique [0002] The rotor of a large-capacity generator weighs 50 to more than 100 tons. When the rotor is pumped through, when the rotor is hoisted by the crane alone, the staff in the stator chamber will remind people to push the opposite wheel on the excitation side to ensure that the rotor Without swinging from side to side, the work of pumping through the rotor is completed. However, the gap between the rotor guard ring and the inner stator is very small, generally 30mm. During the working process, the rotor may collide with the stator and damage the equipment. Many deficiencies: high risk of work: when personnel miscommunicate, it may cause equipment damage; due to the delay between people hearing the information and taking corresponding actions, the rotor may not be adjusted in tim...

AI Technical Summary

Problems solved by technology

However, the gap between the rotor guard ring and the inner stator is very small, generally 30mm. During the working process, the rotor may collide with the stator and damage the equipment. Many deficiencies: high risk of work: when personnel miscommunicate, it may cause equipment damage; due to the delay between people hearing the information and taking corresponding actions, the rotor may not be adjusted in time, causing the rotor to collide with the stator; large manpower investment: pumping When wearing the rotor, in the stator bore, two experienced personnel need to be arranged to keep an eye on the clearance around the stator and rotor to ensure the smooth passage of the rotor; long working hours: when the rotor is hoisted by the crane alone, it needs to pass through the stator bore The pushing direction can only be determined by the communication of the internal personnel. After pushing in the specified direction, the feedback from the personnel in the stator bore is needed to determine the next action. This will cause long working hours, which may cause personnel fatigue and increase work risks.

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