Tool and method for measuring movement quantity of electric auxiliary pump rotor of nuclear power plant

Abstract

The invention belongs to the technical field of nuclear power plant equipment maintenance, and particularly relates to a tool and method for measuring the movement quantity of an electric auxiliary pump rotor of a nuclear power plant. According to the tool and method, the structure is simple, operation is convenient to carry out, the time needed for maintenance is greatly shortened, consumption ofmanpower, material resources and the like required by maintenance is greatly reduced, the risks of human errors and equipment damage are reduced, and the on-site equipment maintenance quality and theworking efficiency are improved. Therefore, manpower perparation and cooperation between different work types are reduced, the complexity of movement measurement operation is greatly reduced, and theon-site work efficiency is improved. Due to the design of the tool, the operation process is more visual and controllable, and the risk of equipment damage caused by human errors is reduced. Meanwhile, the equipment hoisting operation is omitted, and the personal safety risk is reduced. By using the tool and method for measuring movement quantity of the electric auxiliary pump rotor of the nuclear power plant, the measurement on the movement quantity of each stage of the rotor is more convenient to carry out and more accurate, the impeller of each stage is ensured to be installed in place, and it is avoided that detachment is required because the final total movement quantity of the rotor does not reach the standard.

Description

technical field [0001] The invention belongs to the technical field of maintenance of nuclear power plant equipment, and in particular relates to a tool and a method for measuring the displacement of the rotor of an electric auxiliary pump in a nuclear power plant. Background technique [0002] Auxiliary feed water electric pump (referred to as electric auxiliary pump) is a nuclear safety grade equipment in nuclear power plants. Its main function is to provide sufficient flow of feed water to the steam generator when the main feed water system is unavailable, and to export the waste heat of the core to ensure the safety and controllability of the reactor. [0003] The number of rotor stages of the electric auxiliary pump is 12, the shaft system is longer, the parts are more, and the weight is larger, and the dynamic and static fit clearance of each stage is small. [0004] When installing the rotor, it is necessary to measure the forward and backward movement of the rotor re...

AI Technical Summary

Problems solved by technology

[0007] This method of repeatedly installing and dismantling the dial indicator, and measuring the displacement by lifting the pump shaft is cumbersome, and it also brings the risk of damage to the equipment, and the accuracy of human judgment is poor, which can easily lead to improper reassembly between stages As a result, the final amount of displacement is unqualified, resulting in the workload of re-disassembly and waste of manpower, which is not conducive to the safe, reliable and efficient maintenance of on-site equipment

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