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Tandem arc groove type bidirectional rotary sealing end face structure

A two-way rotating, sealed-end technology, applied in the direction of engine seals, engine components, mechanical equipment, etc., can solve the problems of seal component damage, seal failure, etc., to achieve good diversion effect, low seal friction power consumption, strong fluid dynamic pressure and the effect of static pressure

Pending Publication Date: 2022-03-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry gas sealing ring with one-way rotating groove can only rotate in the specified direction. When it is rotated in the opposite direction or installed improperly, it will cause the seal to fail or even seriously damage the sealing element.

Method used

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  • Tandem arc groove type bidirectional rotary sealing end face structure
  • Tandem arc groove type bidirectional rotary sealing end face structure
  • Tandem arc groove type bidirectional rotary sealing end face structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A tandem circular arc groove type bidirectional rotary seal end face structure according to the present invention includes a static ring and a moving ring for mechanical end face sealing, and both the static ring and the moving ring have a sealing end face 100, The outer ring edge of the sealing end face 100 is the sealing high pressure side (ie the upstream side) a, the inner ring edge of the sealing end face is the sealing low pressure side (ie the downstream side) b, and the sealing low pressure side of the sealing end face An annular sealing dam is provided, and five series of circular arc dynamic pressure groove groups 110 are uniformly distributed along the circumference of the sealing end surface on the sealing end face 100 of the static ring and / or moving ring, and each group of serial arc dynamic pressure groove groups The group includes 3 concentric arc grooves, which are respectively named as the first arc groove 1, the second arc groove 2 and the...

Embodiment 2

[0031] Embodiment 2 is attached figure 2 As shown, the difference between the tandem circular arc groove type bidirectional rotary seal end face structure described in this embodiment and embodiment 1 is that the seal end face 100 is evenly distributed along the circumferential direction with 7 tandem arc dynamic pressure groove groups 110. The series of circular arc groove groups partially overlap with adjacent circular arc groove groups; other structures are the same.

[0032] Specifically, taking a single concentric arc groove as an example, the first arc groove 1, the second arc groove 2 and the third arc groove 3 are all represented by O 2 is the center of the circle, and the inner diameter of the first arc groove is Ri 1 mm, the outer diameter is Ro 1 mm; the inner diameter of the second arc groove is Ri 2 mm, the outer diameter is Ro 2 mm; the inner diameter of the third arc groove is Ri 3 mm, the outer diameter is Ro 3 mm. The center O of the sealing end ...

Embodiment 3

[0033] Embodiment 3 is attached image 3 As shown, the difference between the tandem arc groove type bidirectional rotary seal end face structure described in this embodiment and the embodiment 1 is that: the seal end face 100 is evenly distributed along the circumferential direction with 8 tandem arc dynamic pressure groove groups 110, the tandem arc groove group 110 is partially overlapped with the adjacent arc groove group; other structures are the same.

[0034] Specifically, as attached image 3 As shown, taking a single concentric arc groove as an example, the first arc groove 1, the second arc groove 2 and the third arc groove 3 are all represented by O 2 is the center of the circle, and the inner diameter of the first arc groove is Ri 1 mm, the outer diameter is Ro 1 mm; the inner diameter of the second arc groove is Ri 2 mm, the outer diameter is Ro 2 mm; the inner diameter of the third arc groove is Ri 3 mm, the outer diameter is Ro 3 mm. The center O o...

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Abstract

The serial arc groove type bidirectional rotary sealing end face structure comprises a static ring and a movable ring, the static ring and the movable ring are each provided with a sealing end face, the outer ring edge of each sealing end face is a sealing high-pressure side, the inner ring edge of each sealing end face is a sealing low-pressure side, and an annular sealing dam is arranged on the sealing low-pressure side of each sealing end face. A plurality of serial arc dynamic pressure groove sets are evenly distributed in the sealing end face in the circumferential direction of the sealing end face, each serial arc dynamic pressure groove set comprises a plurality of concentric arc grooves, the two ends of each arc groove are communicated with the sealing high-pressure side, and arc-shaped recesses of the arc grooves face the sealing high-pressure side. The invention has the following beneficial effects: the rigidity of a fluid film on the sealing end surface is improved, the sealing operation stability is improved, and a reverse rotation operation condition is provided.

Description

technical field [0001] The invention relates to the technical field of mechanical seal devices, in particular to a seal ring of a dry gas seal or a liquid lubricated mechanical seal device. Background technique [0002] With the development of industry, in order to meet the operation of rotating machinery under various working conditions, there are more and more stringent requirements for sealing. The mechanical end face seal is an advanced dynamic seal for rotating shafts. It has reliable performance, long service life, low power consumption, low maintenance cost, and can adapt to harsh working conditions such as high temperature, high pressure, high and low speed, and various corrosive media. Therefore, it is widely used in petroleum, chemical industry, metallurgy, aviation and other industries. [0003] Non-contact mechanical face seals are widely used in various rotating machinery due to their unique advantages. In order to adapt to more stringent working conditions an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/34
CPCF16J15/34F16J15/3496F16J15/3464
Inventor 孟祥铠彭骞江锦波马艺彭旭东
Owner ZHEJIANG UNIV OF TECH
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