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Follow-up labyrinth seal structure

A labyrinth seal and follow-up technology, applied in the mechanical field, can solve problems such as easy failure and difficult fuel sealing

Active Publication Date: 2020-04-10
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fuel gear pump shaft tail seal usually adopts end face mechanical seal, which generally consists of moving ring, static ring and spring (loading device). The static ring is generally installed on the end cover, and the moving ring is generally installed on the transmission shaft or the moving ring is directly As a gear, it has the advantages of compact structure, high working reliability and long life, but it is difficult to seal the high-pressure (greater than 13MPa) fuel and is prone to failure

Method used

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  • Follow-up labyrinth seal structure
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Embodiment Construction

[0016] see figure 1 as well as figure 2 , the present invention provides a follow-up labyrinth seal structure, including a gear pump housing 1, a labyrinth seal assembly 2 and a driving gear 3; the gear pump housing 1 includes a cylinder with an axial through hole and a The end cover; the labyrinth seal assembly 2 is set outside the driving gear 3 and placed in the axial through hole of the gear pump housing 1 as a whole; the driving gear 3 is in contact with the end cover; it is characterized in that: the follow-up labyrinth seal structure is also It includes a seal ring 6 arranged between the labyrinth seal assembly 2 and the gear pump housing 1, and an anti-slip seal arranged between the labyrinth seal assembly 2 and the gear pump housing 1 to prevent the labyrinth seal assembly 2 from rotating synchronously with the driving gear 3. Resell 5.

[0017] The labyrinth seal assembly 2 is provided with a groove; the sealing ring 6 is placed in the groove, and a protective rin...

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Abstract

The invention belongs to the field of machinery, and relates to a follow-up labyrinth seal structure which comprises a gear pump housing, a labyrinth seal assembly and a driving gear. The gear pump housing comprises a cylinder body with an axial through hole and an end cover arranged at the bottom of the cylinder body; the labyrinth seal assembly is arranged outside the driving gear in a sleevingmode and integrally arranged in an axial through hole of the gear pump housing. The driving gear is in contact with the end cover. The follow-up labyrinth seal structure further comprises a sealingring arranged between the labyrinth sealing assembly and the gear pump housing, and an anti-rotating pin arranged between the labyrinth sealing assembly and the gear pump housing and used for preventing the labyrinth sealing assembly from synchronously rotating along with the driving gear. The invention provides the follow-up labyrinth seal structure capable of realizing high-pressure rotary sealof a fuel gear pump.

Description

technical field [0001] The invention belongs to the field of machinery, and relates to a follow-up labyrinth sealing structure, in particular to a high-pressure (greater than 13MPa) rotating sealing structure of a fuel gear pump. Background technique [0002] Fuel gear pump shaft tail seal usually adopts end face mechanical seal, which is generally composed of moving ring, static ring and spring (loading device). As a gear, it has the advantages of compact structure, high working reliability and long life, but it is difficult to seal the high-pressure (greater than 13MPa) fuel and is prone to failure. The labyrinth seal has a simple structure and is generally used for sealing parts with high pressure and low leakage requirements. The labyrinth seal is used to seal high-pressure (greater than 13MPa) fuel and has a large leakage. Contents of the invention [0003] In order to solve the above-mentioned technical problems in the background technology, the present invention pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C15/00F16J15/16
CPCF04C15/0023F16J15/16
Inventor 魏士杰徐轩崔建宋姗姗李重伯李锴阳
Owner XIAN AERO ENGINE CONTROLS