Water pump for nuclear power station plant

Abstract

The invention relates to a water pump for a nuclear power station plant. The water pump comprises a motor, a motor seat, a pump seat, a connection pipe assembly, a flow guide shell assembly, a water inlet horn and a transmission shaft set. The motor seat is fixedly connected with the pump seat through a pump cover. A bearing seat is arranged in the center of the pump cover. A connector of the bearing seat is provided with a mechanical seal ring assembly. A water outlet bent pipe, a connection pipe E, a middle bearing frame B, a connection pipe D, a middle bearing frame A and a connection pipe A form an upper-bent lower-straight whole connection pipe assembly. An upper flow guide shell and a lower flow guide shell form the whole variable-runner flow guide shell assembly. A shaft frame ring structure is arranged in the middle bearing frame A, the middle bearing frame B and the water inlet horn along the center axis. An umbrella-shaped runner shaft frame ring structure is arranged in the upper flow guide shell and the lower flow guide shell along the center axis. An upper spindle, a middle shaft and an impeller shaft form the whole transmission shaft set. The impeller shaft is provided with an impeller. The provided water pump for a CAP1400 demonstration project plant adopts an overall pumping type structure and has the characteristics of being stable in structure and convenient to maintain.

Description

technical field [0001] The invention relates to a water pump, in particular to a nuclear power plant water pump, which belongs to the field of water pumps. Background technique [0002] The long-axis pump is a pump that uses the suction force generated by the rotating impeller to transport the liquid along the pipeline. It is a pump that uses the lift of the blades to lift the fluid to the outlet and discharge it. It has the characteristics of large flow. Ordinary long-axis pumps include pump body, water delivery section, water outlet elbow, impeller, pump shaft, upper bearing support body, lower bearing support body and packing sealing device. The lower end of the pump body is fixedly connected with the pump pit, and the upper end is connected with the outlet The elbow is fixedly connected, the pump shaft is set in the center of the pump body, the upper end passes through the packing seal device fixed on the water outlet elbow and the upper bearing support device to connect...

AI Technical Summary

Problems solved by technology

[0003] The present invention discloses a new solution for the plant water pump of nuclear power plants, and provides a CAP1400 demonstration project plant water pump, which adopts an integral pumping structure design and solves the problem of inconvenient maintenance of the existing long-axis pump

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