In-service unit domestic ring crane exposed gear replacement method

Abstract

The invention relates to an in-service unit domestic ring crane exposed gear replacement method. The in-service unit domestic ring crane exposed gear replacement method comprises the following steps that S1, an old exposed gear is detached from a set position on a crane; S2, a first convex part of a mould is sleeved with the old exposed gear, then a second convex part of the mould is sleeved witha prefabricated part, and according to the characteristic parameters of the old exposed gear, a new exposed gear is prefabricated from the prefabricated part; S3, the new exposed gear is installed atthe set position of the crane; and S4, gear lapping is conducted on the new exposed gear. According to the in-service unit domestic ring hanging exposed gear replacement method, the exposed gear can be effectively replaced, the reliability of a domestic ring crane of an in-service unit is improved, the overhaul quality is improved, the process steps are reduced, the operation time is shortened, the safety risks of personnel injury, foreign matter falling and the like are reduced, and smooth hoisting of major parts in the overhaul period is ensured.

Description

technical field [0001] The invention relates to the field of nuclear power, and more specifically, relates to a method for replacing domestically produced ring-hung open gears of in-service units. Background technique [0002] The ring crane is used as a crane for hoisting major equipment such as the reactor top cover, upper and lower components, and evaporators during the nuclear island overhaul, and the open gear is the main transmission gear of the ring crane. The replacement process can improve the safety of domestic ring cranes for nuclear power units in service. ,reliability. Due to the material and manufacturing process of the domestic ring hoisting open gears of some units in service, at the same time, due to the harsh environment during the installation and commissioning of the unit, foreign matter entered the open gears, resulting in abnormal wear of the open gears. If they are not replaced, there will be problems. major safety hazard. Contents of the invention ...

AI Technical Summary

Problems solved by technology

Due to the material and manufacturing process of the domestic ring hoisting open gears of some units in service, at the same time, due to the harsh environment during the installation and commissioning of the unit, foreign matter entered the open gears, resulting in abnormal wear of the open gears. If they are not replaced, there will be problems. major safety hazard

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