Test bench for disassembly and assembly process of nuclear power reactor coolant pump

Abstract

The invention provides a test bench for a disassembly and assembly process of a nuclear power reactor coolant pump. The test bench comprises a baseplate, a profiling motor stator shell fixed to the baseplate, a profiling stator flange fixed to the upper end of the profiling motor stator shell, a profiling stator cover used for covering an inner cavity and connected to the upper end of the profiling stator flange, a profiling reactor coolant pump shell provided with a pump shell inner cavity and supported by the profiling stator cover, and a Canopy sealing ring located at the peripheral side ofthe profiling stator cover; the upper and lower ends of the Canopy sealing ring are welded with the profiling reactor coolant pump shell and the profiling stator flange separately, and the profilingreactor coolant pump shell and the profiling stator flange are removably connected by a plurality of profiling main bolts; and the lower end of each profiling main bolt is connected to a profiling main nut. The test bench provided by the application is applicable for the actual maintenance environment and the disassembly and assembly process of the nuclear power reactor coolant pump properly, andthe requirements for installation, debugging and verification of special tools in the disassembly and assembly process of the nuclear power reactor coolant pump can be met; and good basic conditions are provided for the development and debugging of the special tools for the disassembly and assembly of the nuclear power reactor coolant pump.

Description

technical field [0001] The invention relates to the inspection and maintenance field of a shielded main pump for nuclear power, in particular to a disassembly and assembly process test bench for a shielded main pump for nuclear power. Background technique [0002] Different from the shaft-sealed pump used in the second-generation and second-generation plus units, the third-generation AP1000 / CAP1400 series uses a single-stage, fully-sealed electric canned pump, which is the first use of a canned main pump in the field of civil nuclear power. Because the hydraulic components of the shielded main pump and the motor share a main shaft, the coupling is eliminated, thereby eliminating the possibility of water loss accidents caused by seal failure; this structural design of the shielded main pump makes it unnecessary to replace the shaft seal assembly regularly, So it has good economy. However, there are some abnormalities in the actual manufacturing and testing process of the shi...

AI Technical Summary

Problems solved by technology

[0005] However, since the shielded main pump is put into use in a nuclear power plant for the first time, there is currently no related main pump disassembly and maintenance platform, and there are no related special disassembly tools for drilling the Canopy seal ring in the shielded main pump. Hole, cutting, grinding, welding and other operations

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