Afterheat discharging pump for third-generation nuclear power technology AP1000

Abstract

The invention relates to an afterheat discharging pump applicable to conditions adopting a third-generation nuclear power technology AP1000. Major components of the afterheat discharging pump for the third-generation nuclear power technology (AP1000) comprise an impeller wearing ring, a press-out chamber cover plate, an impeller, a pump body, a press-out chamber, a pump cover, a sealing component, a bearing and a motor support frame, wherein the motor support frame, a bearing support frame, the press-out chamber and the pump body are all matched with the end surface of the pump cover, a cup-shaped locking sleeve structure with an anti-loosing structure is adopted, the pump body and the press-out chamber form an energy collecting function component, the press-out chamber and the press-out chamber cover plate adopt the conical surface matching and are connected through screw bolts, the impeller is arranged in the pump body, and the upper end of a pump shaft is provided with a bearing component. The afterheat discharging pump provided by the invention has the characteristics that the structure is simple, safe and reliable, the efficiency is high, the integral anti-seismic performance is good, and the maintenance is convenient and fast; the requirements of high-temperature, high-voltage and severe radiation environment of power plants and strong seismic oscillation can be met.

Description

technical field [0001] The invention relates to a vertical cantilever pump, in particular to a waste heat removal pump suitable for AP1000 nuclear power technology. Background technique [0002] The third-generation nuclear power technology AP1000 waste heat removal pump is one of the important equipment in the normal waste heat export system of this type of nuclear power plant. The aforementioned waste heat removal pump is a nuclear safety three-level pump, which is located in the auxiliary building of the power plant and performs the function of exporting the waste heat in the reactor coolant system during the normal shutdown of the power plant. important role. [0003] At present, there are deficiencies in the technology of ordinary water pumps in China: [0004] First: The overall size of the pump that can meet the corresponding performance requirements is relatively large, which cannot meet the requirements of the installation space in the nuclear power plant. [00...

AI Technical Summary

Problems solved by technology

[0004] First: The overall size of the pump that can meet the corresponding performance requirements is relatively large, which cannot meet the requirements of the installation space in the nuclear power plant

[0005] Second: The locking structure of internal parts cannot meet the requirements of alternating loads in nuclear power plants

[0006] Third: In the operating environment under high temperature and thermal conditions, the stable and reliable long-term operation of the bearing cannot be guaranteed;

[0007] Fourth: After a severe earthquake, the functional integrity of the pump set cannot be guaranteed

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