Machining Technology of Shaft Seal Main Pump Impeller Cover in Nuclear Power Plant

Abstract

The invention relates to a processing technology for the impeller cover of the shaft seal main pump of a nuclear power plant. After the impeller cover blank (1) is placed on the lathe workbench (2) for alignment, the impeller cover blank (1) is fixed with the claws (3) of the workbench ), turning the upper position (4) of the inner and outer circles of the impeller cover blank (1); place the tire (5) on the lathe workbench (2) for alignment, and fix the tire (5) with the workbench claws (3) ), turn the impeller cover (7) into the seam (6) of the tire (5), put the threaded tie rod (9) at both ends into the threaded hole (27) of the lathe table (2) . The thin-walled position of the impeller cover turned by the process method of the present invention will not be deformed, and the lock plate groove is very stable when processing the lock plate groove, so that the lock plate groove can obtain a very high position degree and surface roughness, which solves the problem that manual tools cannot process the lock plate groove. Meet the precision requirements, greatly improve the production capacity and economic benefits of the enterprise and process efficiency.

Description

Technical field: [0001] The invention relates to a processing technology for a shaft seal main pump impeller cover of a nuclear power plant. Background technique: [0002] The outer guide pipe of the shaft seal main pump of the nuclear power plant is one of the key components of the shaft seal main pump of the nuclear power plant, and the processing and manufacturing of the impeller cover is particularly important for the localization of the shaft seal main pump. Ensuring that the thin-walled impeller cover is not deformed and the coaxiality of the inner and outer circles and the processing of the lock plate groove are the technical problems of this workpiece. The original turning method is to directly clamp the impeller cover for processing. The defect is that the direct clamping will easily cause the deformation of the impeller cover, and the coaxiality of the inner and outer circles cannot be guaranteed. After assembly, if the coaxiality of the inner and outer circles is ...

AI Technical Summary

Problems solved by technology

The original turning method is to directly clamp the impeller cover for processing. The defect is that the direct clamping will easily cause the deformation of the impeller cover, and the coaxiality of the inner and outer circles cannot be guaranteed. After assembly, if the coaxiality of the inner and outer circles is different, it will cause When the main pump is running, the impeller rubs against the impeller cover, which leads to accidents. The original method of processing the hole of the locking plate is to use a hand electric drill with tooling assistance. The defect lies in the unstable quality caused by manual processing, and the processing accuracy and roughness are not It is difficult to meet the design requirements, the processing efficiency is low, and it also has a negative impact on the efficiency of assembly

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