Reactor-circuit main pump motor electric engine driving apparatus

Abstract

The invention belongs to the technical field of mounting and overhauling of a main pump unit of a nuclear power plant, specifically relates to a reactor-circuit main pump motor electric engine drivingapparatus, and aims to research and develop a set of electric engine driving tool suitable for a three-bearing main pump unit, wherein the tool is required to be capable of eliminating the potentialsafety hazard and shortcomings of the original manual engine driving tool; and meanwhile, the new engine driving tool is capable of satisfying extremely high requirement on throw and centering of thethree-bearing main pump unit quickly, and is safe and reliable, simple and practical, and capable of improving the overhaul quality of the main pump and shortening the overhauling time. The reactor-circuit main pump motor electric engine driving apparatus is characterized by comprising an ejection bolt, an oil baffle ring, a bearing, a thrust nut, a connecting nut, a bracket, a tool shaft, a bearing housing, a motor, a speed reducer bracket, a baffle and a speed reducer. By virtue of improvement of the process design of the whole set of the tool, a process with multiple times of repeated assembling and disassembling and repeated adjustment caused by the original manual tool can be avoided.

Description

technical field [0001] The invention belongs to the technical field of installation and maintenance of a main pump unit of a nuclear power plant, and in particular relates to an electric barring device for a main pump motor of a reactor primary circuit. Background technique [0002] The main pumps of Fangjiashan and Fuqing primary circuits are single-stage, centrifugal, vertical axial flow pumps produced by Andritz Austria, and the supporting motors are three-phase squirrel-cage induction motors designed and produced by China Harbin Electric. The whole unit is three bearing structure. The three-bearing main pump unit is a new product specially designed by ANDRITZ for Fangjiashan and Fuqing units. Therefore, the invention of the electric barring device that meets the requirements of this unit is the first in the world and is also the installation and maintenance process of this type of main pump unit. It is a large special tool to be used in conjunction with it. During the ...

AI Technical Summary

Problems solved by technology

[0004] 2. The concentricity adjustment of the motor and the bearing box, the error is within 0.02mm;

[0005] 3. The coaxiality adjustment between the motor shaft and the pump shaft, the error is within 0.02mm;

[0007] 1. The way is outdated and requires 8 people to promote;

[0008] 2. The rotor swing of the nuclear main pump motor should not exceed 0.02mm. When using this turning tool, since the tool shaft and the motor shaft thread are only connected by a lock nut, the end faces cannot be completely fitted, causing the tool shaft to There is a slight deviation from the concentricity of the motor shaft, which affects the up and down swing value of the motor rotor

And if the swing of the motor is unqualified, it is necessary to remove all the turning tools, and tentatively add adjustment gaskets to the connecting nut. Generally, repeated trials are required to achieve the swing of the motor. The workload is heavy and the efficiency is low, which affects nuclear power plants. Plant overhaul critical path;

[0009] 3. It is very laborious to turn the car, and when the meter reader calls to stop, there is often a delay due to the inconsistent response of many people;

[0010] 4. The space on the top of the motor is small, and 8 people cannot use it on it at the same time;

[0011] 5. The height of the motor is about 5 meters, and there are oil stains on it, the risk of too many people is high, and there is a possibility of falling from a high place;

[0012] 6. The site environment is poor, and it is unsafe for personnel to repeatedly climb up and down the top of the motor

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