Large-scale shielding motor flywheel shell hot jacket process

Abstract

The invention relates to a large-scale shielding motor flywheel housing hot jacket process, and the process adopts a crane (1), a hanging belt (2), a first hanging ring (3), a second hanging ring (5) and a thermal insulation cylinder (7) for assembly; a flywheel housing (6) is installed in the thermal insulation cylinder (7), the flywheel housing (6) is rounded, and the roundness tolerance of an inner hole of the flywheel housing (6) is less than 0.1 mm; and the whole heat preservation cylinder (7) provided with the flywheel shell (6) is put into a heating furnace (8) to be heated by adopting a second hanging ring (5). The problems that the thin-wall part is poor in shrinkage fit roundness, uneven in heating and fast in heat dissipation, the assembly clearance is difficult to guarantee in the shrinkage fit process, the thin-wall part of the flywheel shell is prone to deflection and clamping stagnation of the flywheel in the shrinkage fit mode are solved, and the shrinkage fit quality of the flywheel shell of the thin-wall part and the performance of a shielding motor are guaranteed.

Description

Technical field: [0001] The invention relates to a heat-shrinking process of the flywheel shell of a large-scale shielded motor. Background technique: [0002] With the development and application of nuclear power technology, the safety of nuclear power plants has been continuously improved and improved, and large canned motor pumps will be widely used. This canned motor pump has upper and lower flywheels in its structure, which provide high moment of inertia for the main pump motor and ensure the idling characteristics of the main pump. The outer circle of the flywheel is installed with a casing made of alloy 625 through a thermal sleeve, which is used to protect the flywheel from corrosion. The wall thickness of the shell is 2mm, the height is 450mm, the diameter is 1000mm, and the thermal tightening amount is 0.8mm. Usually, this kind of thin-walled parts heat-fitting usually adopts the method of hoisting and leveling the thin-walled parts, heating the thin-walled parts...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a large-scale shielded motor flywheel housing thermal fitting process, which solves the problems of poor roundness of thin-walled parts, uneven heating temperature, fast heat dissipation, difficulty in maintaining workpiece level, assembly clearance and thermal fitting time during the thermal fitting process , to ensure the success of thin-wall parts thermal sleeve

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