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Bird-wing-imitated multichannel groove end face seal structure

An end face sealing and multi-channel technology, which is applied to engine sealing, engine components, mechanical equipment, etc., can solve problems such as large leakage rate, unsatisfactory anti-interference ability, poor start-up or stop performance, etc., to achieve reduced leakage and excellent performance. Comprehensive sealing performance and effect of improving load carrying capacity

Active Publication Date: 2013-12-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned dry gas end seals generally have poor start-up or stop performance, large leakage rate or unsatisfactory resistance to external disturbances, and it is difficult to meet special operating requirements such as low speed and frequent start-up.

Method used

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  • Bird-wing-imitated multichannel groove end face seal structure
  • Bird-wing-imitated multichannel groove end face seal structure
  • Bird-wing-imitated multichannel groove end face seal structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see figure 1 , Figure 2 and image 3 ,

[0030] In this example, a bird-wing-shaped multi-channel end face seal structure includes two mechanical seal rings, that is, a moving ring and a static ring. There are a plurality of imitation bird-wing multi-pass grooves evenly distributed along the circumference, and the imitation bird-wing multi-pass grooves are located on the high-pressure side of the medium, that is, upstream; the imitation bird-wing multi-pass grooves include more than two drainage grooves 2 and One or more arc grooves 3, the arc groove 3 is located on the downstream side of the drainage groove 2 and connected with each drainage groove 2, the drainage groove 2 communicates with the outer diameter of the sealing ring, the two or more The drainage grooves 2 are distributed along the circumferential direction, and the sealing weirs 1 without slots are used to isolate the drainage grooves 2. The annular zone formed by the non-grooving area on the upper surfa...

Embodiment 2

[0037] see Figure 4 The difference between this embodiment and Embodiment 1 is that the drainage groove 2 is a double-row connected spiral groove, the direction of the helix angle of the upstream spiral groove 2a is opposite to that of the downstream spiral groove 2b, and the downstream spiral groove 2b and the downstream spiral groove 2b are opposite to each other. The circular arc grooves 3 are connected, and the rest of the structure and implementation are the same as in the first embodiment.

Embodiment 3

[0039] see Figure 5 , the difference between this embodiment and embodiment one is that the number N of the drainage grooves y =3, the three drainage grooves are distributed along the circumferential direction, and the number of arc grooves N h =2, the arc grooves are distributed along the radial direction, the middle drainage groove 2c and the leeward side drainage groove 2a are connected through the upstream arc groove 3a, the middle drainage groove 2c is not connected with the downstream arc groove 3b, and the rest of the structure And the embodiment is the same as the first embodiment.

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Abstract

A bird-wing-imitated multichannel groove end face seal structure comprises a movable ring and a static ring which are mechanical seal rings. The end face of at least one of the movable ring or the static ring is provided with a plurality of bird-wing-imitated multichannel grooves which are evenly distributed along the circumference, and the bird-wing-imitated multichannel grooves are located on the medium high-pressure side, namely upstream. Each bird-wing-imitated multichannel groove comprises at least two draining grooves and at least one arc groove, each arc groove is located on the downstream side of the draining grooves and communicated with the same, the draining grooves are communicated with the medium high-pressure side or the upstream and evenly and circumferentially distributed, and every two draining grooves are separated by an unslotted seal weir. A ring formed on the circumferential unslotted area of the end face is a seal dam which is located on the low-pressure side of the end face, namely downstream. The bird-wing-imitated multichannel groove end face seal structure is high in end face static pressure effect, low in energy consumption, stable in operation at low speed, low in leakage amount, excellent in anti-interference performance, and especially suitable for non-contact dry gas seal of equipment such as reaction kettles and stirrers.

Description

technical field [0001] The invention relates to a bird-wing-shaped multi-channel groove end face sealing structure, which belongs to a non-contact dry gas sealing device for a rotating shaft, and is suitable for the shaft end sealing device for rotating shafts of various compressors, pumps, kettles and other rotating equipment. Background technique [0002] The shafts of rotary fluid mechanical equipment generally adopt ordinary mechanical seals or non-contact end face seals. In the late 1970s, the sealing technology began to be partially replaced by the dry gas seal of "gas seal liquid" or "gas seal gas". The above-mentioned ordinary contact or non-contact liquid lubricated mechanical seals have achieved remarkable results, represented by John Crane (www.johncrane.com), Flowserve (www.flowserve.com) and Bergmann (www.eagleburgmann.com) The world-renowned sealing companies have successively developed one-way rotating dry gas seals such as spiral grooves, spiral grooves with...

Claims

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Application Information

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IPC IPC(8): F16J15/40
Inventor 彭旭东张风云白少先李纪云孟祥铠
Owner ZHEJIANG UNIV OF TECH
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