Spent fuel pool cooling pump for nuclear power station

Abstract

The invention discloses a spent fuel pool cooling pump for a nuclear power station, which is a cooling pump of a single-stage single-suction cantilever horizontal type, is convenient to maintain and has good shock resistant performance. The spent fuel pool cooling pump comprises a pump body, a pump cover provided with a mechanical sealing chamber, a pump shaft, an impeller, an impeller nut, a shaft sleeve, a bearing body, a cylindrical roller bearing and an diagonally contact ball bearing; a shaft sealing component comprises bearing oil sealing devices and a mechanical sealing device; the pump body is provided with a radial split type double spiral case structure; a suction inlet and a discharge outlet of the pump body are arranged perpendicularly; the pump cover is connected between the front end of the pump body and the rear end of the bearing body; a pre-connecting screw is arranged between the pump cover and the bearing body; the impeller is connected to the back end of the pump shaft through an impeller nut, wherein a steel wire thread sleeve is arranged in an inner cavity of the impeller nut; the cylindrical roller bearing is arranged at a non-drive end of the pump shaft; the diagonally contact ball bearing is arranged at a drive end of the pump shaft in a back to back manner; two sets of bearing oil sealing devices are provided and are both labyrinth sealing devices; and the mechanical sealing device is an assembled type mechanical sealing device.

Description

technical field [0001] The invention relates to a pump, in particular to a spent fuel pool cooling pump for nuclear power plants. Background technique [0002] The main functions of spent fuel pool cooling pumps in nuclear power plants are as follows: [0003] 1) The pump, the heat exchanger in the circuit where it is located, and the spent fuel pool form a cooling circuit, and play the role of conveying material liquid in the circuit to serve the spent fuel pool; [0004] 2) The cooling circuit formed by the pump and other equipment in the circuit to which it belongs runs continuously, bringing out the residual heat released by the spent fuel assembly in the spent fuel pool, and limiting the water temperature of the pool to not higher than 50°C. [0005] At present, the spent fuel pool cooling pumps used in nuclear power plants generally have technical problems such as large volume, inconvenient maintenance, and poor shock resistance. Due to the limitation of the installa...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a spent fuel pool cooling pump for nuclear power plants, which can effectively solve technical problems such as large volume, inconvenient maintenance, and poor shock resistance.

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