Manufacturing process of keyway of bearing guide ring of nuclear main pump in nuclear power plant

Abstract

The invention relates to a manufacturing process of a keyway of a bearing guide ring of a nuclear main pump of a nuclear power plant. The machining sequence of the bearing guide ring (3) is completed on the forging blank according to the drawing requirements; the bearing guide ring (3) is fixed on a five-axis machining center (5) On the workbench (6), use the five-axis machining center (5) and the right-angle head (4) to process 8 keyways (2) through the rotation of the workbench (6). The width of each keyway (2) is 48mm. The vertical distance between the bottom of each keyway (2) and the center of the bearing guide ring (3) is 204.15 mm; after the machining sequence is completed, the 8 keyways of the bearing guide shaft are machined separately using a five-axis machining center with an angle head, and divided into two parts. Secondary surfacing welding stellite. The invention improves the strength and precision of the keyway of the bearing guide ring, finally completes the processing of 8 keyways, reduces the manufacturing cost, shortens the processing time, improves the production efficiency, improves the service life of the bearing guide ring, and has been used in nuclear main pumps has been widely applied.

Description

Technical field: [0001] The invention relates to a manufacturing process for a key groove of a bearing guide ring of a nuclear main pump of a nuclear power plant. Background technique: [0002] The bearing guide ring of the nuclear main pump of the nuclear power plant is a key component of the shaft seal main pump. The manufacturing accuracy of the 8 key grooves of the bearing guide ring of the nuclear main pump of the nuclear power plant directly affects the setting block with the 8 key grooves of the lower guide bearing. If the 8 key grooves of the bearing guide ring If the shape and position tolerance of the keyway cannot meet the accuracy requirements, it is difficult to configure 8 qualified centering blocks at the same time, which may cause the lower guide bearing to be eccentric, so that the lower guide bearing is eccentrically worn during operation, and the vibration of the main pump is too large, which is more serious. cause a nuclear power plant accident. The manu...

AI Technical Summary

Problems solved by technology

The traditional process is to use forgings to directly process 8 keyways with a slotting machine, and then use special tools to grind the shape and size tolerances of the keyways. The process is too cumbersome and the accuracy is difficult to meet the requirements. Machining the keyway not only affects the service life of the bearing guide ring, but also affects the life of the nuclear main pump

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