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Nuclear power plant main pump heat insulation device and preparation method thereof

A heat insulation device and nuclear power plant technology, applied in the field of nuclear engineering, can solve problems such as inconvenient installation and maintenance, a large number of parts, and poor heat insulation effect, and achieve the effects of easy installation and maintenance, improved surface quality, and reduced quantity

Active Publication Date: 2019-05-17
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The present invention aims at the large number of parts and complex structure of the existing main pump heat insulation device of nuclear power plant, inconvenient installation and maintenance, poor heat insulation effect, high temperature reactor coolant will soon enter the water lubricated bearing under the power failure condition of the whole plant To solve the problem of shaft seal components, a heat insulation device for the main pump of a nuclear power plant and its preparation method are provided. The device is prepared by a 3D printing manufacturing method, which is different from the existing heat insulation device manufactured based on traditional processing technology, and reduces the number of parts. Quantity, improve the cooling effect and heat insulation effect

Method used

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  • Nuclear power plant main pump heat insulation device and preparation method thereof
  • Nuclear power plant main pump heat insulation device and preparation method thereof
  • Nuclear power plant main pump heat insulation device and preparation method thereof

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Effect test

Embodiment 1

[0056] The invention provides a thermal insulation device for the main pump of a nuclear power plant, such as figure 1 As shown, the device includes a main body part 100. The main body part 100 is provided with an axial penetration part 101 for sheathing the main pump shaft, and at least one annular flow channel provided on the outer periphery of the axial penetration part 101 for cooling water to circulate. , And an annular cavity 110 arranged on the outer periphery of the annular flow passage and surrounding the annular flow passage.

[0057] Specifically, the axial penetration portion 101 includes a top portion 1011, a tubular middle body 1012 communicating with the top portion 1011, and a bottom portion 1013 communicating with the lower part of the tubular middle body 1012. The top portion 1011 is provided with a first annular recess 10111. The position 10111 is used to install the internal auxiliary impeller fixed on the pump shaft and the corresponding axial positioning devi...

Embodiment 2

[0068] The invention also provides a method for preparing the heat insulation device of the main pump of a nuclear power plant, with reference to image 3 , The method includes the following steps:

[0069] S1. Establish a three-dimensional solid model of the thermal insulation device and convert the three-dimensional solid model into a standard file in STL format. Errors may occur when the three-dimensional solid model is converted into a standard file in STL format. You need to repair the possible errors first, and then Work out a 3D printing manufacturing process;

[0070] S2. According to the standard documents, use metal 3D printing layer by layer printing process to manufacture the heat insulation device, transfer the above-mentioned data of each layer to the 3D printing equipment, and control the printing parameters to sequentially sinter or fuse each layer and simultaneously Connecting the layers, the printing parameters include powder thickness, sintering thickness, laser...

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Abstract

The invention discloses a heat insulation device for a main pump of a nuclear power plant and a manufacturing method thereof, belonging to the technical field of nuclear engineering. At least one annular flow channel for providing cooling water circulation, the annular flow channel has an input end for receiving shaft seal injection water and an output end for output shaft seal injection water; the input end is provided with a plurality of circumferentially distributed axial holes , used to receive the water injected into the shaft seal and evenly enter the annular flow channel; the output end is provided with a plurality of radial holes distributed around the circumference, which are used to inject the shaft seal flowing downward into water to lubricate the radial bearing; the axial penetration part is provided with multiple Evenly distributed grooves are used to prevent the flow of reactor coolant and shaft seal injection water along the pump shaft. The heat insulation device for the main pump of the nuclear power plant of the present invention is an integral structure, which is convenient for installation and maintenance, can reduce the temperature of the heat insulation body, improve the heat insulation effect, and reduce the weight of components.

Description

Technical field [0001] The invention belongs to the technical field of nuclear engineering, and particularly relates to a thermal insulation device for a main pump of a nuclear power plant and a preparation method thereof. Background technique [0002] The main pump is one of the key equipment of the primary circuit system of the PWR nuclear power plant, and the reliable operation of the main pump can ensure the continuous and safe operation of the nuclear power plant. Shaft seal type main pumps are currently widely used in nuclear power plants. In order to ensure the normal operation of the main pump shaft seal components and water-lubricated bearings, a shaft seal injection water system (including chemical volume control system injection water and emergency shaft seal injection water) is provided. At the same time, a heat insulation device is provided inside the pump body. [0003] The main functions of the thermal insulation device include: [0004] 1) Prevent the heat of the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/58B22F3/105B33Y10/00
CPCF04D29/5886B33Y10/00B22F10/00B22F10/38B22F10/62B22F10/66B22F10/36B22F10/64B22F10/366B22F10/20B22F10/50Y02P10/25
Inventor 陈兴江刘彦章方熙权张峰刘倩李石磊
Owner 中广核工程有限公司