CN201306450Y - Labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter - Google Patents
Labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter Download PDFInfo
- Publication number
- CN201306450Y CN201306450Y CNU2008202288437U CN200820228843U CN201306450Y CN 201306450 Y CN201306450 Y CN 201306450Y CN U2008202288437 U CNU2008202288437 U CN U2008202288437U CN 200820228843 U CN200820228843 U CN 200820228843U CN 201306450 Y CN201306450 Y CN 201306450Y
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- CN
- China
- Prior art keywords
- labyrinth
- spiral
- rotating shaft
- seal
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter, which comprises a sealing cavity assembly sheathed on a rotating shaft. A labyrinth sealing ring, a spacing pad and a spiral sealing sleeve are respectively arranged at the bottom of the sealing cavity from top to bottom, and the peripheral edges thereof are in transition fit with the inner circumferential wall of the sealing cavity. The gap between the inner circumferential wall of the spiral sealing sleeve and the rotating shaft is smaller than or equal to 0.5 mm. The utility model has the advantages of simple structure and good sealing effect.
Description
Technical field
The utility model relates to a kind of vesselseals device, particularly large-diameter unit loading type welded metal bellow labyrinth combination sealing arrangement.
Background technique
Losing efficacy and damaging often appears in the behaviour in service complexity of vesselseals, particularly on the response generalization construction equipment, or medium therein have solidify or the equipment of phenomenon such as weak corrosion on, the seal failure situation is especially outstanding.The main cause of a lot of reactor seal leakages and inefficacy causes that because of interior the scurrying into of medium of still coking causes compensating element mistake bullet to cause in the Seal cage.
The model utility content
The purpose of this utility model is to provide a kind of large-diameter unit loading type welded metal bellow labyrinth combination sealing arrangement, and it is simple in structure, is easy to make install, and can improve the sealing effect of still with machinery.
The purpose of this utility model is achieved in that a kind of large-diameter unit loading type welded metal bellow labyrinth combination sealing arrangement, comprise the Seal cage assembly that is sleeved in the rotating shaft, setting gradually labyrinth seal ring, separation pad and spiral seal cover from down to up in the Seal cage bottom, be transition fit between these three's outer periphery and the Seal cage inner circle wall, the gap between spiral seal cover inner circle wall and the rotating shaft is less than or equal to 0.5mm.
The utility model is provided with a cover labyrinth seal supplementary structure in the Seal cage bottom, particularly adopted the composite structure of spiral seal cover and labyrinth seal ring, just can prevent scurrying into of the interior medium of still effectively, improve sealing effect, and saved a large amount of oil sealings.The utility model is simple in structure, is easy to make install, and can improve the sealing effect of still with machinery, reduces enterprise's cost of production.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Accompanying drawing is that master of the present utility model looks cross-sectional view.
Embodiment
A kind of large-diameter unit loading type welded metal bellow labyrinth combination sealing arrangement, as shown in drawings, comprise the Seal cage assembly that is sleeved in the rotating shaft, the Seal cage assembly is included in the retainer ring assembly of installing successively on the Seal cage top 1, the axle sleeve 2 that is sleeved on rotating shaft top, be provided with the pair sealing 3 that is sleeved on axle sleeve 2 outsides in the secondary gland 4 of axle sleeve 2 outsides, secondary gland 4 belows are being provided with main gland 5, and main frame envelope 6 is being set in Seal cage 7 tops of main gland 5 belows.
Setting gradually labyrinth seal ring 10, separation pad 9 and spiral seal cover 8 from down to up in Seal cage 7 bottoms, all be transition fit between these three's outer periphery and Seal cage 7 inner circle walls, the gap that spiral seal is overlapped between 8 inner circle walls and the rotating shaft is less than or equal to 0.5mm.
In order further to improve sealing effect of the present utility model, labyrinth seal ring 10 can be two or more.The Hand of spiral of 8 inner circle walls and the switched in opposite of rotating shaft are overlapped in described spiral seal.On Seal cage 7 walls above the spiral seal cover 8 a nitrogen inlet hole 11 is being set, this inlet hole 11 links to each other with nitrogen gas conveying device.After adding nitrogen, the still internal pressure can be equilibrated to certain height like this, effectively stop the interior medium of still to be scurried into.
Claims (3)
1, a kind of large-diameter unit loading type welded metal bellow labyrinth combination sealing arrangement, comprise the Seal cage assembly that is sleeved in the rotating shaft, it is characterized in that: setting gradually labyrinth seal ring, separation pad and spiral seal cover from down to up in the Seal cage bottom, be transition fit between these three's outer periphery and the Seal cage inner circle wall, the gap between spiral seal cover inner circle wall and the rotating shaft is less than or equal to 0.5mm.
2, large-diameter unit loading type welded metal bellow according to claim 1 labyrinth combination sealing arrangement is characterized in that: the Hand of spiral of spiral seal cover inner circle wall and the switched in opposite of rotating shaft.
3, large-diameter unit loading type welded metal bellow according to claim 1 labyrinth combination sealing arrangement is characterized in that: on the capsule walls above the spiral seal cover nitrogen inlet hole is being set, this inlet hole links to each other with nitrogen gas conveying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202288437U CN201306450Y (en) | 2008-12-15 | 2008-12-15 | Labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202288437U CN201306450Y (en) | 2008-12-15 | 2008-12-15 | Labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306450Y true CN201306450Y (en) | 2009-09-09 |
Family
ID=41098915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202288437U Expired - Fee Related CN201306450Y (en) | 2008-12-15 | 2008-12-15 | Labyrinth assembly sealing device for assembled welding metal bellows with large axial diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201306450Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593938A (en) * | 2016-12-16 | 2017-04-26 | 哈尔滨电气动力装备有限公司 | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system |
-
2008
- 2008-12-15 CN CNU2008202288437U patent/CN201306450Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593938A (en) * | 2016-12-16 | 2017-04-26 | 哈尔滨电气动力装备有限公司 | Mechanical labyrinth seal for nuclear main pump two-way thrust bearing circulating lubricating oil system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20151215 |
|
| EXPY | Termination of patent right or utility model |