Wear-resistant mechanical sealing structure on end face

An end face sealing and wear-resistant technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of cold welding, easy to generate howling sound, and difficult end face processing, so as to achieve small frictional heat and improve Reliable, cost-effective effect

Active Publication Date: 2006-08-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art that the end face is difficult to process, the cost is high, the frictional heat is large during operation, howling is easy to occur, and cold welding occurs when starting, the present invention provides a convenient processing, relatively low cost, and when working It has low frictional heat, good wear resistance, strong pressure and heat resistance, excellent start / stop performance, stable and reliable work, can be started frequently, and can be applied to a wear-resistant type with high parameters (high temperature, high pressure and high speed). Type Mechanical Face Seal Structure

Method used

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  • Wear-resistant mechanical sealing structure on end face
  • Wear-resistant mechanical sealing structure on end face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A wear-resistant mechanical end face seal structure, including a moving ring 5 and a static ring 6 of the mechanical seal, micro-protrusions 1 are processed on the end faces of the moving ring or the static ring, and the micro-protrusions 1 are arranged in a ring according to the center of the end face The ring belt is provided with an annular seal dam 2 symmetrical to the center of the end face, the end face of the seal dam is a smooth surface, and there is an annular seal dam on the end face.

[0040] The microprojections gradually increase along the leakage direction of the sealing medium, and their maximum height does not exceed the height of the adjacent sealing dam, and the density of the microprojections decreases slightly along the leakage direction of the sealing medium.

[0041] The structural parameters of microprojections range from: aspect ratio or aspect ratio α is 1 to 10; height is 2 to 200 μm; area density is 0.1 to 0.7; the distance between the cross-se...

Embodiment 2

[0045] A wear-resistant mechanical end face seal structure, including a moving ring 5 and a static ring 6 of the mechanical seal, micro-protrusions 1 are processed upstream of the end face of the moving ring or the static ring, and the micro-protrusions are arranged in an annular band according to the center of the end face , there is an annular sealing dam 2 symmetrical to the center of the end face next to the ring belt, the end face of the sealing dam is a smooth surface, the height of the sealing dam 2 is equal to the height of the micro-protrusion 1, and the downstream of the end face is also processed according to the end face A micro-groove 3 symmetrical to the center, the sealing weir 4 of the micro-groove is as high as the sealing dam 2, and there is an annular sealing dam on the end face, and the sealing dam 2 is located between the micro-protrusion 1 and the micro-groove 3.

[0046] The microprojections have the same height along the radial direction of the end face....

Embodiment 3

[0050] A wear-resistant mechanical end face seal structure, including a moving ring 5 and a static ring 6 of the mechanical seal, micro-protrusions 1 are processed downstream of the end face of the moving ring or the static ring, and the micro-protrusions 1 are arranged in a ring according to the center of the end face The ring belt is provided with an annular seal dam 2 symmetrical to the center of the end face. The end face of the seal dam is a smooth surface. The upstream of the end face is also processed with a micro-groove 3 symmetrical to the center of the end face. The micro-groove The sealing weir 4 is as high as the sealing dam 2, and there is an annular sealing dam 2 on the end face, and the sealing dam 2 is located between the microprotrusion 1 and the microgroove 3.

[0051] The microprotrusions 1 gradually increase along the leakage direction of the sealing medium, and their maximum height does not exceed the height of the adjacent sealing dam 2, and the density of...

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Abstract

A wear-proof mechanical end face sealing structure comprises mechanical sealing movable and fixed rings, on the end faces of which are machined microlugs arranged a girdle according to the centre of the end face. Beside the girdle is disposed a ring sealing dam with a smooth surface symmetrically about the centre of the end face and there is at least one ring sealing dam on the end face. The parametric range of the microlug structure is that, the aspect ratio or the breadth depth ratio is 0.5~30, the height is 2~500 mu m, the area density is 0.1~0.7 and the distance between the section axile wires of the adjacent microlugs is 0.05~1.0 mm.

Description

(1) Technical field [0001] The invention relates to a rotating shaft seal of a rotary fluid machine, which is especially suitable for the shaft end sealing device of rotating machine shafts such as various compressors, pumps and kettle agitators, and belongs to the technical field of mechanical end face sealing. (2) Background technology [0002] In petroleum, petrochemical and chemical industries, as well as power, aerospace and other industries, mechanical face seals have been widely used. As far as the traditional contact mechanical seal is concerned, since the frictional heat generated between the opposite sliding end faces is enough to cause end face deformation, increase power consumption, accelerate the aging of sealing components, and cause other unpredictable failures, so in many critical occasions The seal is gradually being replaced by advanced sealing technology, among which dry gas end seal (DGS for short, see Lubrication Engineering, 1990, 46(9): pp607) and ups...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16
Inventor 彭旭东李纪云
Owner ZHEJIANG UNIV OF TECH
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