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A dry gas sealed self-cooling structure and method

A dry gas sealing, self-cooling technology, applied in the direction of machine/engine, leakage prevention, mechanical equipment, etc., can solve the limited temperature tolerance of flexible plastic sealing ring, can not meet the application requirements of supercritical carbon dioxide turbine high temperature conditions, etc. problem, to achieve the effect of solving the dynamic sealing problem

Active Publication Date: 2021-11-30
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing dry gas seal is limited by the temperature tolerance of the flexible plastic sealing ring used between the surfaces of its key components, and can only be used in medium and low temperature environments below 300°C, which cannot meet the high temperature conditions of supercritical carbon dioxide turbines. Application requirements

Method used

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  • A dry gas sealed self-cooling structure and method
  • A dry gas sealed self-cooling structure and method
  • A dry gas sealed self-cooling structure and method

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Embodiment 1

[0037] Such as Figure 1 ~ Figure 3 As shown, the dry gas seal is moving ring 1, static ring 2, push ring 5, and spring seat 6 from left to right. The gas sealing function between the push rings 5, the second sealing gasket 4 is placed between the push ring 5 and the spring seat 6, and plays the gas sealing function between the push ring 5 and the spring seat 6. The push ring 5 is connected with the fixed spring seat 6 through a spring, so that the push ring 5 can move with the static ring 2 and play a role of dynamic sealing.

[0038] The spring seat 6 is provided with 5 rows of internal cooling micro-ring holes 7 from the inside to the outside in the radial direction, and the hole diameter is 0.2mm. Each row of internal cooling micro-ring holes 7 is provided with 5 rows of internal cooling micro-ring holes 7 according to the width of the spring seat 6. Constitute the internal cooling micro-ring hole matrix. The internal cooling micro-annular holes 7 are connected to each o...

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Abstract

The invention provides a dry gas sealed self-cooling structure and method, including a moving ring, a static ring, a push ring and a spring seat that cooperate with each other, and the spring seat is provided with several rows of internal cooling micro-ring holes from the inside to the outside in the radial direction. Each column of inner cooling micro-annular holes includes several rows of inner cooling micro-annular holes arranged along the width direction of the spring seat. Cooling micro-annular hole matrix, wherein the inlet of the internal cooling micro-annular hole matrix is ​​connected to the upstream high-pressure sealed isolation gas connection and the outlet is connected to the downstream atmosphere, forming a micro-porous cooling channel through the upstream and downstream of the dry gas seal. Methods The above dry gas seal self-cooling structure is used to cool the dry gas seal. The invention fully utilizes the process and conditions of the dry gas seal in its normal working process, effectively controls the working temperature of the key sealing gasket of the dry gas seal, and raises the operating temperature of the dry gas seal to above 600°C.

Description

technical field [0001] The invention relates to the technical field of sealing device structures, and more specifically, to a dry gas sealing self-cooling structure and method. Background technique [0002] The supercritical carbon dioxide power generation system is a Brayton cycle system using supercritical carbon dioxide as the working medium. The cycle process is as follows: first, the supercritical carbon dioxide is boosted by the compressor; Heating; secondly, the working medium enters the turbine to drive the turbine to do work, and the turbine drives the motor to generate electricity; finally, the working medium enters the cooler to return to its original state, and then enters the compressor to form a closed cycle. Among them, when the temperature of carbon dioxide reaches 31.10C and the pressure reaches 7.38MPa, it will become a supercritical state. Its special physical characteristics of low gas viscosity and high liquid density make it have good fluidity, high hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D11/04F01D25/12
CPCF01D11/04F01D25/12
Inventor 王俊峰黄彦平刘光旭臧金光祝培源
Owner NUCLEAR POWER INSTITUTE OF CHINA
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