Supercritical carbon dioxide centrifugal compressor and radial-inward-flow turbine coaxial structure

A centrifugal compressor, carbon dioxide technology, applied in mechanical equipment, steam engine installations, machines/engines, etc., can solve the problems of complex system, high motor manufacturing requirements, and increased cost, and achieve large enthalpy drop, compact structure, and cost-saving. Effect

Inactive Publication Date: 2017-12-12
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, the system that uses high-speed motor to drive the centrifugal compressor is relatively complicated, the motor manufacturing requirements are high, and the cost increases

Method used

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  • Supercritical carbon dioxide centrifugal compressor and radial-inward-flow turbine coaxial structure
  • Supercritical carbon dioxide centrifugal compressor and radial-inward-flow turbine coaxial structure

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing.

[0029] refer to figure 1 , a supercritical carbon dioxide centrifugal compressor and centripetal turbine coaxial structure of the present invention, including centrifugal compressor 1, centripetal turbine 2, heat source 3, cooler 4, gearbox 5, generator 6, radial bearing 7. Thrust bearing 8, supercritical carbon dioxide dry gas seal 9 and starter motor 10; wherein, the centrifugal compressor 1 with supercritical carbon dioxide as the working fluid and the radial turbine 2 form a coaxial structure, and the starter motor 10 passes through the gearbox 5 drives the coaxial structure to start working, and the power provided by the centripetal turbine 2 can not only drive the centrifugal compressor 1, but also output power to the generator 6 through the gearbox 5.

[0030] The supercritical carbon dioxide working medium first flows through the centrifugal compressor 1 to reach a...

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Abstract

The invention discloses a supercritical carbon dioxide centrifugal compressor and radial-inward-flow turbine coaxial structure. A supercritical carbon dioxide working medium sequentially flows through a centrifugal compressor to improve pressure and a heat source to improve temperature, and finally after output work in a radial-inward-flow turbine, the supercritical carbon dioxide working medium enters a cooler to be cooled and circulates to enter the centrifugal compressor again. A start motor drives the coaxial structure to start working through one gearbox, the coaxial structure is formed by the radial-inward-flow turbine and the centrifugal compressor through a rotor shaft, the centrifugal compressor is driven by one part of output work of the radial-inward-flow turbine, and the other part of output work of the radial-inward-flow turbine is output into a generator through the other gearbox. Radial bearings are arranged at the shaft ends of the two sides of the coaxial structure, a thrust bearing is arranged in the middle of the coaxial structure, and the type adapting to the corresponding rotary shaft rotating speed can be selected. Furthermore, the form of supercritical carbon dioxide dry gas seals is adopted in sealing parts. The supercritical carbon dioxide centrifugal compressor and radial-inward-flow turbine coaxial structure has the prominent beneficial effects of being simple and compact in structure, high in pneumatic efficiency, low in manufacturing cost and the like and has wide market prospects.

Description

technical field [0001] The invention relates to an impeller mechanical power output structure, in particular to a coaxial structure of a supercritical carbon dioxide centrifugal compressor and a centripetal turbine. Background technique [0002] The Brayton cycle system using supercritical carbon dioxide as a working medium has the remarkable characteristics of compact structure, high efficiency, and environmental friendliness. Using supercritical carbon dioxide as a working medium for power generation is currently replacing the traditional boiler heating steam power generation technology to achieve more energy utilization. An important direction for efficient and low-cost development. The supercritical carbon dioxide power generation system mainly includes compressors, power generation turbines, generators, heat sources, regenerators, cooling equipment, etc. Among them, the main function of the compressor is to provide the corresponding high-pressure driving force for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/32F01K25/10F01D15/08F01D15/10
CPCF01K7/32F01D15/08F01D15/10F01K25/103
Inventor 张荻王雨琦谢永慧
Owner XI AN JIAOTONG UNIV
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