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Supercritical carbon dioxide turbine rotor radial supporting system

A turbine rotor and carbon dioxide technology, applied in steam engine devices, engine components, machines/engines, etc., can solve the problems of limited damping and lifting effect, limited effect, and inability to completely suppress rotor amplitude, etc., to achieve large radial support damping and avoiding amplitude Peak, simple structure effects

Pending Publication Date: 2022-01-07
HUNAN INSTITUTE OF ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the squeeze film damper has a limited effect on damping, and it cannot completely suppress the sharply increased rotor vibration near the critical speed of the turbine rotor; a single boost of radial support damping has a limited effect on solving the above problems

Method used

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  • Supercritical carbon dioxide turbine rotor radial supporting system
  • Supercritical carbon dioxide turbine rotor radial supporting system
  • Supercritical carbon dioxide turbine rotor radial supporting system

Examples

Experimental program
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, the present invention includes a turbine rotor 9, an eddy current displacement sensor and two bearing seats 13 (the number of bearing seats is not limited to two). The turbine rotor 9 is provided with two bearing support sections 91 (the number of bearing support sections 91 is the same as the number of bearing seats 13 ). Bearing housing 13 inner hole is provided with supporting shell 21, as Figure 2-4 As shown, the support shell 21 is provided with a radial tilting pad bearing 22, and between the outer wall of the bearing shell of the radial tilting pad bearing 22 and the support shell 21, multiple sets of shape memory alloy (SMA) springs 23 and a ring A wire mesh block 24, multiple groups of shape memory alloy springs 23 are evenly arranged along the circumferential direction, each group of shape memory alloy springs 23 includes ...

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Abstract

The invention discloses a supercritical carbon dioxide turbine rotor radial supporting system. The system comprises a turbine rotor and a plurality of bearing seats. Bearing supporting sections are arranged on the turbine rotor, supporting outer shells are arranged in inner holes of the bearing seats, radial tilting pad bearings are arranged in the supporting outer shells, a plurality of groups of shape memory alloy springs and an annular metal wire mesh block are arranged between the outer wall of a bearing shell of each radial tilting pad bearing and the corresponding supporting outer shell, each group comprises two shape memory alloy springs located on the same bus of the corresponding bearing shell, the two shape memory alloy springs are located on the two sides of the corresponding metal wire mesh block respectively, the bearing supporting sections on the turbine rotor are supported in the corresponding radial tilting pad bearings, the bearing seats are connected with a heating / cooling device, and the heating / cooling device can heat or cool the radial tilting pad bearings. The structure is simple, the amplitude peak value of the critical rotating speed of the rotor can be avoided, it is ensured that the sCO2 turbine rotor stably passes through the critical rotating speed of the sCO2 turbine rotor in the speed increasing and decreasing process, and the bearing rigidity can be adjusted and controlled.

Description

technical field [0001] The invention relates to the technical field of supercritical carbon dioxide turbines, in particular to a supercritical carbon dioxide turbine rotor radial support system. Background technique [0002] Due to the extremely high fluid density of supercritical carbon dioxide sCO2 while maintaining low viscosity, turbomachinery with sCO2 working fluid presents unique challenges to bearing support systems. sCO2 is used as the working fluid in the power cycle. This unique fluid characteristic leads to the characteristics of compactness, high speed and high energy density of sCO2 working medium turbomachinery. Therefore, bearing applications in sCO2 turbomachinery face challenges related to bearing surface speed and bearing specific load. [0003] At the same time, the sCO2 turbine rotor has a long axial length and a large Strong flexibility. In order to ensure the efficiency of the sCO2 overall power generation system, the working speed of the sCO2 turbi...

Claims

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Application Information

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IPC IPC(8): F01D25/28F01D25/16F01D25/10F01D25/12F01D25/04F01D21/00F01K25/10
CPCF01D25/28F01D25/16F01D25/162F01D25/10F01D25/12F01D25/125F01D25/04F01D21/003F01K25/103
Inventor 关汗青周晓璐全昌旭肖逸奇刘志伟魏克湘
Owner HUNAN INSTITUTE OF ENGINEERING
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