Process method for nuclear power station four-bearing shaft-sealing main pump centering block dimension configuration

Abstract

The invention relates to a process method for nuclear power station four-bearing shaft-sealing main pump centering block dimension configuration. Eight tool keys and filler gauges are matched to carryout clearance measurement, so that the configured dimensions of centering blocks are determined. The dimensions of the eight centering blocks configured by the process method provided by the invention are accurate, and the positioned tool keys and the filler gauges at the corresponding positions have the same thickness and dimension requirements, so that the coaxiality of a bearing guide ring anda lower guiding bearing can be ensured, the problem that the lower guiding bearing and the bearing guide ring are not coaxial due to nonuniformity of the configured dimensions of the centering blocksis solved, the problem that the lower guiding bearing and the bearing guide ring cannot be assembled due to inaccurate configured dimensions of the centering blocks is solved, the production capacityand the production capacity of enterprises are greatly improved, and a domestic technical capacity of a nuclear main pump is increased.

Description

[0001] Technical field: [0002] The invention relates to a process method for preparing the size of a centering block of a four-bearing shaft-sealed main pump of a nuclear power plant. [0003] Background technique: [0004] The centering block of the lower guide bearing and the bearing guide ring of the nuclear power plant is the key component of the shaft seal main pump of the nuclear power plant. The process method for the size preparation of the centering block of the four-bearing shaft seal main pump of the nuclear power plant is very important for the normal operation of the shaft seal nuclear main pump and the manufacture of the main pump The localization of technology is particularly important. The size preparation of the centering block of the four-bearing shaft seal main pump of the nuclear power plant has always been a technical problem. The traditional process method is to install the bearing guide ring on the lower guide bearing, measure the keyway width of the b...

AI Technical Summary

Problems solved by technology

The traditional process method is to install the bearing guide ring on the lower guide bearing, measure the keyway width of the bearing guide ring and the lower guide bearing, and then prepare the centering blocks one by one. The disadvantage is that the size of the centering block prepared by this method is not accurate. The coaxiality requirements of the lower guide bearing and bearing guide ring cannot be controlled, and the lower guide bearing and bearing guide ring cannot be positioned first, resulting in uncertainty in the position of the centering block after assembly and the size of a single centering block is not accurate enough. As a result, the bearing guide ring cannot be installed in the lower guide bearing, and the centering block needs to be remanufactured, and the manufacturing process of the centering block is complicated, which brings cost loss and delay in the construction period. Even if it is installed, the lower guide bearing may be eccentric, thereby The lower guide bearing will be eccentrically worn during operation, and the vibration of the main pump will be too large, which will even cause a nuclear power plant accident.

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