Nuclear power generator sealing tile processing method

Abstract

The invention discloses a method for processing a sealing tile of a nuclear power generator, comprising the following steps: S1, preparing an arc-shaped piece according to the radian of the sealing tile, as a reference reference tool; S2, laying the reference reference tool flat on a lathe and fixing it on a lathe. Alignment, one plane of the datum reference tooling is upward as a fixed surface; S3, the four tiles of the sealing tile are fixed on the datum reference tooling in turn, and the end face of the datum reference tooling is used as the datum reference surface, The end face of the pad is milled to obtain a pad with a predetermined arc length. The method for processing the sealing tile of a nuclear power generator of the present invention improves the accuracy of processing the end face of the pad by setting a reference reference tool as the processing benchmark of the pad, and solves the problems of incomplete contact and opening of the end face of the pad; The inner diameter deviation of the ring circumference is the smallest, which avoids repeated processing, greatly reduces the consumption of labor and lathe resources, and shortens the processing period of the sealing tile.

Description

technical field [0001] The invention relates to the technical field of nuclear power equipment processing, in particular to a method for processing a nuclear power generator sealing tile. Background technique [0002] ALSTOM half-speed single-flow ring generator sealing pads are fixed by springs, and a certain pre-tightening force is applied to match the circumference of the generator journal. During operation, a certain pressure of sealing oil is supplied from the outside. A pressure oil film is formed between the sealing tiles to prevent the leakage of hydrogen from the generator. For the sealing tile to perform its normal function, the mating surface must ensure a certain smoothness and circumferential clearance. [0003] During one cycle of operation, the mating end face between the sealing pad and the journal and the sealing pad chamber will inevitably be worn and scratched, causing the roughness to exceed the standard; the sealing pad will be periodically impacted by ...

AI Technical Summary

Problems solved by technology

However, in the first process of sealing tile processing, milling the end face of the tile to reduce the inner diameter, there has been a long-term problem that when 4 sealing tiles are assembled together after processing, there is a gap between the end faces of the tile, and the gap value varies from 0.02 to 0.12mm. like figure 1 shown

The above problems exist in the sealing tile processing process for a long time, resulting in repeated sealing tile processing, and affecting the precision after processing, resulting in a very large waste of construction period, manpower, and lathe resources

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