Dry gas sealing device suitable for supercritical working medium

A dry gas sealing and supercritical technology, which is applied to engine sealing, engine components, mechanical equipment, etc., can solve the problems of increasing the risk of sealing failure, high supercritical working fluid parameters, and rising temperature of sealing rings, so as to reduce leakage amount, reduce bearing wear, and reduce the effect of end surface temperature

Active Publication Date: 2018-09-28
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nevertheless, the supercritical working fluid parameters are relatively high, which brings great challenges to the sealing performance
In addition, the high temperature of the supercritical working fluid increases the temperature of the sealing ring of the dry gas seal, which leads to thermal deformation and increases the risk of seal failure

Method used

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  • Dry gas sealing device suitable for supercritical working medium
  • Dry gas sealing device suitable for supercritical working medium
  • Dry gas sealing device suitable for supercritical working medium

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited only to the following content. Without departing from the above idea of ​​the present invention, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

[0034] see figure 1, a dry gas sealing device suitable for supercritical working fluid according to the present invention, comprising a first static ring 1, a moving ring 2, a second static ring 3, a slot 4 on the end face of the inlet side of the moving ring, and an opening on the end face of the gas outlet side of the moving ring Groove 5 , first static ring cooling channel 6 , second static ring cooling channel 7 , chamber wall 8 , enhanced heat exchange structure 9 , rot...

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Abstract

The invention discloses a dry gas sealing device suitable for a supercritical working medium. Two-stage level dry gas seal is composed of a static ring-moving ring-static ring structure. The sealed supercritical working medium flows through, in the radial direction, a first-stage dry gas seal, and then flows through, in the radial direction, the flow channel between the moving ring and a cavity wall, and then flows through a second-stage dry gas seal. Divergent clearance is adopted in the first-stage dry gas seal, cooling channels are separately arranged on the two static rings, and a heat transfer enhancement structure is arranged on the cavity wall to reduce the end face temperature of a sealing ring. The sealed supercritical working medium is subjected to two-stage level dry gas seal, the leakage rate is greatly reduced, and the sealing performance is good. The dry gas sealing device suitable for the supercritical working medium has the remarkable advantages of reducing the temperature of the sealing ring, reducing the leakage rate and ensuring the sealing performance, and has broad market prospect.

Description

technical field [0001] The invention relates to a dry gas sealing device suitable for supercritical working fluid, which can be used for the sealing of rotating machinery in supercritical power cycles. Background technique [0002] The continuous increase in power demand has made the operating parameters of the generator set continue to increase, even reaching a supercritical state. The supercritical working fluid has good physical properties and thermal stability, which makes the supercritical working fluid power cycle have high efficiency. At the same time, the sealing of rotating mechanical equipment of supercritical generator sets has also become a research focus. [0003] As a non-contact seal, the dry gas seal has outstanding advantages such as low power consumption, low leakage, less wear, and long life. It is widely used in rotating mechanical equipment of large-scale units. Periodically distributed micron-scale shallow grooves are processed on the static or dynami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/40
Inventor 张荻杜秋晚谢永慧
Owner XI AN JIAOTONG UNIV
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