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Supercritical carbon dioxide gas cooling and recycling device for Brayton cycle power generation system

A technology of Brayton cycle and power generation system, which is applied to steam engine devices, engine components, machines/engines, etc. It can solve the problems of heat affecting the work of rolling bearings, achieve good sealing performance, large cooling area, and ensure normal operation.

Pending Publication Date: 2022-04-12
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a supercritical carbon dioxide gas cooling recovery device for Brayton cycle power generation system to solve the problem in the prior art that the high temperature of the steam turbine causes the heat to be easily transferred to the rolling bearing through the rotating shaft and affect the operation of the rolling bearing. technical problem

Method used

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  • Supercritical carbon dioxide gas cooling and recycling device for Brayton cycle power generation system
  • Supercritical carbon dioxide gas cooling and recycling device for Brayton cycle power generation system
  • Supercritical carbon dioxide gas cooling and recycling device for Brayton cycle power generation system

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specific Embodiment 1

[0043] Such as figure 1 As shown, the supercritical carbon dioxide gas cooling recovery device is applied to the Bretton circulation power generation system in this embodiment, and the Bretton circular power generation system includes a steam turbine 100 and a generator 200, and the steam turbine 100 has an impeller, an impeller fixed mounting. On the impeller power output shaft 8, the impeller power output shaft 8 is supported by the rolling support bearing 400, and the impeller power output shaft 8 is provided with a transmission mechanism between the generator 200, and the corresponding steam turbine 100 is provided with a working fluid circulating gas path 300. In order to provide supercritical carbon dioxide to the steam turbine 100 as a circulating work, the driving turbine 100 is rotated, and when the impeller of the steam turbine 100 is rotated, the generator 200 is driven by the impeller power output shaft 8 to perform power generation.

[0044] Since the temperature of t...

specific Embodiment 2

[0065] Its difference from the first embodiment is mainly in that in the first embodiment, the sealing disk is located within the end rotation chamber of the cooling ring sleeve structure, and the outer side of the opposite side of the two-sealing plate is a sealing side, and there is a spiral groove, and used A dry gas seal is formed. In the present embodiment, the sealing disk may be disposed outside the end of the cooling ring sleeve for forming an assembled gap with both end faces of the cooling ring sleeve, and the inner side surface of each sealing disk is a sealing side. A spiral groove is provided, and a dry gas seal is formed when the two-sealing disk follows the rotation axis.

[0066] At this time, the cooling ring sleeve structure can be provided with a multi-row-in-air hole at one end of the axial direction, and the carbon dioxide gas is input to the cooling chamber. When the other end is provided, the multi-routing recovery hole is provided, and the carbon dioxide ga...

specific Embodiment 3

[0068] Its difference from Example 1 is mainly in: in Example 1, the cooling ring sleeve structure includes an intermediate ring sleeve portion and an internal cloth gaseous shaft, and an internal cloth gas shaft is fixed to the intermediate ring sleeve portion by a fixed end cap. In the present embodiment, the cooling ring sleeve can also be used only a single ring sleeve, at which time, the radial intake hole can be processed on the ring sleeve, and the radial intake hole can be provided, and to achieve a throttling effect. The radial throttle can be designed as a stepped hole structure, and the small diameter segment functions as a throttle.

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Abstract

The invention relates to a supercritical carbon dioxide gas cooling and recycling device for a Brayton cycle power generation system, which comprises a cooling ring sleeve structure used for being sleeved outside a corresponding rotating shaft in a clearance manner so as to form a cooling cavity with the rotating shaft, and a gas inlet channel and a recycling channel are arranged on the cooling ring sleeve structure; the air inlet channel and the recovery channel are both communicated with the cooling cavity and a working medium circulation air path of the power generation system so that supercritical carbon dioxide in the working medium circulation air path can be introduced into the cooling cavity, and then the rotating shaft is cooled. The gas inlet channel and the recovery channel are connected into the working medium circulation gas circuit of the Brayton cycle power generation system, and the working medium circulation gas circuit can be used for providing low-temperature gas for the cooling recovery device and cooling the rotating shaft, so that a rolling support bearing is prevented from being influenced by high temperature, and normal work of the rolling support bearing is ensured.

Description

Technical field [0001] The present invention relates to a Bretton circulating power generation system with supercritical carbon dioxide gas cooling recovery apparatus. Background technique [0002] The dynamic circulation of supercritical carbon dioxide works has gradually become a research hotspot, and its excellent performance is of great significance to the next generation of solar thermal energy, geothermal energy and nuclear power generation. Compared with other thermoelectric power generation system technology, the main difference between supercritical carbon dioxide thermal power generation systems is to use Carbon dioxide in supercritical states to achieve a Bretton cycle as a medium to achieve higher efficiency, smaller volume of power generation systems. However, the use of carbon dioxide as a hot media puts higher requirements for the design integration of each module in the closure Bretton cycle. [0003] In the supercritical carbon dioxide Bretton circulating power g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/12F01D11/04F01K25/10F01D15/10
Inventor 李济顺李俊薛玉君李留政李伦杨芳马喜强余永健郭楠司东宏隋新
Owner HENAN UNIV OF SCI & TECH
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