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Bellows type mechnical seal

A technology of mechanical seals and bellows, which is applied in the direction of engine seals, mechanical equipment, engine components, etc., can solve the problems of damage to bellows 101, and achieve the effect of reducing impact and inhibiting damage

Inactive Publication Date: 2012-03-14
EAGLE INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, considering the dimensional change caused by thermal expansion, since the centering case 106 is embedded with a small gap, when fluid such as tar or asphalt enters the gap and is fixed at this time, the vibration will be transmitted to the bellows 101, causing Damage to bellows 101

Method used

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  • Bellows type mechnical seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] refer to figure 1 , the bellows type mechanical seal according to Embodiment 1 of the present invention will be described. figure 1 It is a schematic cross-sectional view illustrating the structure of the bellows-type mechanical seal in Embodiment 1 of the present invention.

[0057] The bellows-type mechanical seal 1 of this embodiment is used in petroleum refining, petrochemical equipment, iron-making chemical equipment, etc., for treating fluids with a high temperature exceeding 200°C and containing many solid components, such as asphalt, tar, or asphalt. Pump shaft seal.

[0058] The general structure of the bellows type mechanical seal 1 is to seal the shaft hole 21 of the housing 20 and the rotating shaft 30 by sealing the seal ring 12 in sealing contact with the adapter ring 13 fixed to the rotating shaft 30 and the stopper 14 respectively. The annular gap, wherein the stopper 14 is elastically supported on the housing 20 via the bellows 11, the collar 15, th...

Embodiment 2

[0075] refer to Figure 2 ~ Figure 3B , the bellows-type mechanical seal 1' according to the second embodiment of the present invention will be described. figure 2 It is a schematic cross-sectional view illustrating the structure of a bellows-type mechanical seal 1' according to Embodiment 2 of the present invention. Figure 3A and Figure 3B A schematic diagram illustrating the structure of the elastic member, Figure 3A is a schematic cross-sectional view of the elastic component, Figure 3B for Figure 3A Sectional view of direction A. Here, the same reference numerals are assigned to the same structures as in the above-mentioned first embodiment, detailed description thereof will be omitted, and only the differences from the first embodiment will be described. The unexplained structures are the same as those in Example 1.

[0076] This embodiment includes an elastic member 17 that applies elastic force to the stopper 14 in the outer diameter direction. The elastic ...

Embodiment 3

[0082] refer to Figure 4 A bellows-type mechanical seal 1" of Embodiment 3 of the present invention will be described. Figure 4 It is a schematic cross-sectional view illustrating the structure of the bellows-type mechanical seal 1"' of Embodiment 3 of the present invention. Here, for the same structures as the above-mentioned embodiments, the same symbols are attached, and detailed descriptions are omitted. Only the above-mentioned The parts that are different from the embodiments will be described. The structures that are not described are the same as those of the above-mentioned embodiments.

[0083] In this embodiment, an annular groove 14d is provided on the inner peripheral side of the stopper 14', and the elastic member 17 is attached to the annular groove 14d. That is, compared to the aforementioned embodiment 2, which damps the vibration of the sealing ring 12 and the stopper 14 via the centering housing 16 ′, this embodiment uses the elastic member 17 to directly ...

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Abstract

A bellows type mechanical seal is provided that is capable of reducing adverse effects on the bellows. The bellows type mechanical seal includes a first annular member (13) fixed on a rotary shaft (30), a second annular member (14) resiliently supported by the bellows (11) in a housing (20) axially to the outside of the first annular member (13), a seal ring (12) having a first end seal face (12a1) contacting the first annular member and a second end seal face (12a2) contacting the second annular member (14),both seal faces being perpendicular to the shaft. A centering member (16) is arranged contacting the inner surface of the seal ring (12) and the inner surface of the second annular member (14) within an annular space formed between both of the inner surfaces and the shaft to keep the sealing ring (12) and the second annular member (14) in alignment with each other.

Description

technical field [0001] The invention relates to a bellows type mechanical seal. Background technique [0002] As we all know, in petroleum refining, petrochemical equipment, iron and steel chemical equipment, etc., as a pump shaft seal device that handles fluids such as asphalt, tar, or pitch that are high in temperature exceeding 200°C and contain a large amount of solid content, there are bellows mechanical seal (see Non-Patent Document 1). [0003] refer to Figure 6 ~ Figure 8 , the existing bellows type mechanical seal will be described. Figure 6 It is a schematic cross-sectional view illustrating the existing bellows type mechanical seal structure. Figure 7 for Figure 6 X-direction cross-section. Figure 8 It is a schematic cross-sectional view illustrating other existing bellows-type mechanical seal structures. [0004] Figure 6 The shown mechanical seal 100 is in free slidable contact with an engagement ring 103 fixed to the rotating shaft 300 through a sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/36F16J15/34
CPCF16J15/363
Inventor 高桥秀和
Owner EAGLE INDS
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