Mechanical manufacturing method for rotor shaft of heavy nuclear power generator

Abstract

The invention discloses a mechanical manufacturing method for a rotor shaft of a heavy nuclear power generator. The rotor shaft of the heavy nuclear power generator is processed by adopting a heavy numerical control sleeping car with maximum processing diameter of 3.5 meters and maximum length of 20 meters, wherein in the rotor shaft, the length is 13,983 millimeters, the diameter is 1,882 millimeters and the weight is 100 to 350 tons; the surface roughness of a center hole, the depth of which is 2.5+/-0.1 meters, of the rotor shaft reaches Ra1.6; the roundness of the central hole in a full length range is less than 0.10 millimeter; and the coaxiality of the external circle of the reference shaft neck of the rotor shaft and the central hole meets the precision requirement of less than 0.50 millimeter in the full length. The method can solve the equipment problem that the current heavy deep hole drilling and boring machine in the heavy equipment manufacturing industry cannot meet deep hole processing of a heavy nuclear power rotor; and the method realizes mechanical manufacture of the rotor shaft of the nuclear power generator on the processing aspect of a heavy vehicle and a deep hole, and ensures the manufacturing precision requirement of the rotor shaft of the nuclear power generator on the boring aspect of the full external circle and the heavy vehicle and the deep hole.

Description

technical field [0001] The invention relates to a manufacturing method of a nuclear power generator rotor shaft, in particular to a mechanical manufacturing method of a heavy nuclear power generator rotor shaft. Background technique [0002] With the continuous improvement of international nuclear power technology and nuclear power installed capacity, the manufacture of heavy nuclear power generator rotors will also become a necessity in the heavy equipment manufacturing industry. The rotor shaft of a 1000MW class heavy nuclear power generator such as figure 1 As shown, the length is nearly 14m, the diameter is nearly 2m, and the weight is nearly 200 tons. The machining accuracy requirements of the rotor shaft are as follows: [0003] 1. The roundness of the outer circle of the reference journal at both ends of the rotor shaft is <0.05mm, the cylindricity is less than 0.05mm, and the surface roughness of the outer circle of the reference journal reaches Ra0.8; [0004]...

AI Technical Summary

Problems solved by technology

The straightness and precision of the center hole processed in this way are very poor, so the rotor shaft can only be rough-machined, and the center hole cannot be finished. Accuracy requirements for axis angle<0.50mm/2500mm

[0010] Du

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