Cooling method and structure of cantilever type supercritical carbon dioxide turbine

A carbon dioxide and supercritical technology, applied in the sealing of engines, mechanical equipment, engine components, etc., can solve the problems of casing and rotor strength threats, limited space for temperature changes, large temperature stress, etc., to achieve good cooling and reduce Temperature stress, effect of reducing radial temperature gradient

Pending Publication Date: 2022-01-25
CHONGQING JIANGJIN SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

There are rubber sealing rings installed between the static ring retainer and the shell of the dry gas seal, and between the dynamic ring retainer and the main shaft. As high as 450-780°C, it is necessary to cool the shell and rotor, which will cause a large temperature change from 450-780°C to 175°C on the shell and rotor.

Method used

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  • Cooling method and structure of cantilever type supercritical carbon dioxide turbine
  • Cooling method and structure of cantilever type supercritical carbon dioxide turbine
  • Cooling method and structure of cantilever type supercritical carbon dioxide turbine

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Example Embodiment

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element...

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Abstract

The invention relates to the field of turbines, in particular to a cooling method and structure of a cantilever type supercritical carbon dioxide turbine, main sealing gas for dry gas sealing is injected from a first gas channel on a dry gas sealing shell, and the sealing gas is cooling gas which sequentially flows into the shell along a second gas channel and a first gap between a high-speed shaft and a splitting ring; and one path of cooling gas is exhausted to an exhaust flow channel in the shell through an exhaust hole of a baffle, the other path of cooling air is exhausted to the exhaust flow channel in the shell through a second gap formed by the baffle and a turbine disc, in addition, after the splitting ring and a middle shell are split into two parts, the radial temperature gradient on each part is reduced, therefore, the temperature stress on each part is reduced, the turbine can be better cooled, and the strength reliability of a unit is ensured.

Description

technical field [0001] The invention relates to the field of turbines, in particular to a cooling method and structure of a cantilever type supercritical carbon dioxide turbine. Background technique [0002] The supercritical carbon dioxide turbine uses high-temperature (450-780°C) and high-pressure (15-25MPa) supercritical carbon dioxide as a working medium, expands when flowing through the nozzle ring and turbine disk inside the shell, converts thermodynamic energy into gas kinetic energy, and drives The turbine disk rotates, and the turbine disk is connected to the high-speed rotor, which is directly driven or driven by a gear to drive the generator to generate electricity. The pressure level inside the housing is high, requiring a dry gas seal to prevent a large amount of carbon dioxide from leaking through the gap between the housing and the main shaft. [0003] The dry gas seal is also composed of dynamic and static rings and dynamic and static ring cages. There are ...

Claims

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Application Information

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IPC IPC(8): F16J15/34F16J15/447F16J15/40F01D5/18
CPCF16J15/34F16J15/3404F16J15/447F16J15/40F01D5/18
Inventor 李扬文鑫吴小荣但光局王亚何丹邓德见张艳
Owner CHONGQING JIANGJIN SHIPBUILDING IND
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