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Small reactor main pump

A technology of pump shaft and pump casing, applied in the field of small reactor main pump, can solve the problems of high maintenance cost, large water consumption, complicated maintenance, etc., and achieve the effect of prolonging the service life and reducing the heat conduction area.

Pending Publication Date: 2019-09-20
上海阿波罗智能装备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insulation structure, in the early days, water-cooling and heat insulation were mostly used. The water-cooling and heat-insulation structure requires special cooling towers, cooling water pumps, chilled water pumps and other equipment, which consumes a lot of water resources and is complicated to maintain. The maintenance cost is high

Method used

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Embodiment Construction

[0025] see figure 1 In order to better understand the technical solution of the present invention, the inventors of the present invention will describe in detail below through specific embodiments in conjunction with the accompanying drawings:

[0026] A small stack main pump of the present invention includes a pump end, a motor end, an air heat shield 3 between the pump end and the motor end, and a pump shaft 2 vertically penetrating the motor end and the pump end from top to bottom.

[0027] The pump end includes a pump casing 11 , a guide body 12 , an impeller 13 , an impeller nut 14 , guide vanes 15 , a balance disc 16 , and a main seal 17 .

[0028] The motor end includes a shielded motor 4 .

[0029] The air heat shield 3 comprises an upper flange 31 , a constriction 32 and a lower flange 33 . The bottom surface of the lower flange 33 is coaxially fixed on the top surface of the pump casing 11 , the bottom surface of the lower flange 33 and the top surface of the pump ...

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Abstract

The invention discloses a small reactor main pump. The small reactor main pump comprises a pump end used for conveying a transmission medium, a motor end used for driving the pump end, and a pump shaft penetrating through the pump end and the motor end, wherein the pump end comprises a pump shell, and the motor end comprises a shielding motor; an air heat insulation screen is arranged between the pump end and the motor end, the bottom surface of the air heat insulation screen is fixed on the top surface of the pump shell, the top surface of the air heat insulation screen is fixed on the bottom surface of the shielding motor, and the outer circumference of the air heat insulation screen is provided with a necking part shrinking inwards. The small reactor main pump has the technical effects that on the basis of meeting a vibration demand, the heat conduction area of the air heat insulation screen is reduced as much as possible, so that the transmission of heat of the pump end to the shielding motor is slowed down, the temperature inside the shielding motor is controlled within a reasonable range, and the service life of the shielding motor is prolonged.

Description

technical field [0001] The invention relates to a small reactor main pump in the field of nuclear power. Background technique [0002] At present, there are two structural forms of reactor main pumps in domestic nuclear power plants, namely shaft-sealed pumps and shielded pumps; from the perspective of the pump inlet and outlet directions, the reactor main pumps all adopt the structure of lower water inlet and horizontal water outlet. [0003] The reactor main pump used for reactors below 30W MW is also called the small reactor main pump. The function of the main pump of the small reactor is to force the coolant to perform closed circulation in the main system, transfer the heat energy generated by the reactor to the steam generator, heat the medium in the secondary circuit into steam, and drive the steam turbine to do work. In the shutdown state, it is required that the main pump of the small reactor can idle for more than 3s at half flow rate, so that the coolant can cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D3/00F04D13/06F04D29/58
CPCF04D3/005F04D13/06F04D29/5893
Inventor 刘淦高泽民
Owner 上海阿波罗智能装备科技有限公司
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