A fishbone-like dry gas seal structure

A dry gas sealing and fish imitation technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of unsuitable bidirectional rotating machinery, weak dynamic pressure opening effect, and large deformation of the sealing end face, and achieves the opening ability. Enhances, reduces the risk of seal failure, and reduces the effect of seal face variation

Active Publication Date: 2020-03-17
XI AN JIAOTONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, most widely used dry gas seals are one-way rotary seals, which are not suitable for two-way rotary machines.
However, the existing dry gas seals that can rotate in both directions have disadvantages such as weak dynamic pressure opening effect, high leakage, and large deformation of the sealing end face.

Method used

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  • A fishbone-like dry gas seal structure
  • A fishbone-like dry gas seal structure
  • A fishbone-like dry gas seal structure

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Embodiment Construction

[0042] 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.

[0043] see figure 1 , a herringbone imitation dry gas sealing structure provided by the present invention includes a moving ring and a static ring. The outer diameter side of the moving ring and the static ring end face is the seal inlet, that is, the high pressure side, and the inner diameter side is the seal outlet, that is, the low pressure side. On the high pressure side of at least one end surface of the moving ring and the static ring, imitation fishbone grooves are p...

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Abstract

The invention discloses a fishbone simulation type dry gas seal structure. The fishbone simulation type dry gas seal structure comprises a moving ring and a static ring, wherein a seal inlet is formedin the outer diameter side, namely the high-pressure side, of the moving ring, a seal inlet is formed in the outer diameter side, namely the high-pressure side, of the static ring, a seal outlet is formed in the inner diameter side, namely the low-pressure side, of the moving ring, and a seal outlet is formed in the inner diameter side, namely the low-pressure side, of the static ring. A plurality of fishbone simulation type grooves are evenly distributed on the high-pressure side of at least one end face of the moving ring in the circumferential direction, and a plurality of fishbone simulation type grooves are evenly distributed on the high-pressure side of at least one end face of the static ring in the circumferential direction. A non-hole area between every two adjacent fishbone simulation type grooves in the circumferential direction is a sealing weir 4. Annular sealing dams 8 are arranged below the fishbone simulation type grooves. The fishbone simulation type dry gas seal structure has the remarkable advantages of being high in opening capacity, high in stability, low in leakage quantity, less in sealing end face deformation and capable of carrying out two-way rotation, and the like, and thereby having broad market prospect.

Description

technical field [0001] The invention relates to a fishbone imitation dry gas sealing structure, which is suitable for various rotating mechanical seals. Background technique [0002] With the development of science and technology, energy power, petrochemical and other fields have put forward higher requirements for sealing structures. Dry gas seals have been widely used in rotating machinery due to their significant advantages such as low leakage, low wear, and long life. At present, most widely used dry gas seals are one-way rotary seals, which are not suitable for two-way rotary machines. However, the existing dry gas seals that can rotate in both directions have disadvantages such as weak dynamic pressure opening effect, high leakage, and large deformation of the sealing end face. In view of this situation, it is necessary to study a sealing structure suitable for bidirectional rotation that can enhance the opening ability, reduce the temperature of the end surface, red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/34F16J15/40
CPCF16J15/3404F16J15/40
Inventor 张荻杜秋晚谢永慧
Owner XI AN JIAOTONG UNIV
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