CN201288691Y - Shaft sealing structure for centrifugal pump - Google Patents
Shaft sealing structure for centrifugal pump Download PDFInfo
- Publication number
- CN201288691Y CN201288691Y CNU2008201543715U CN200820154371U CN201288691Y CN 201288691 Y CN201288691 Y CN 201288691Y CN U2008201543715 U CNU2008201543715 U CN U2008201543715U CN 200820154371 U CN200820154371 U CN 200820154371U CN 201288691 Y CN201288691 Y CN 201288691Y
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- CN
- China
- Prior art keywords
- packing
- gland
- seal
- seal ring
- 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 shaft seal structure of a centrifugal pump, comprising an outer box body, a packing filled between the outer box body and a rotating shaft, and a gland for sealing the outer box body, the gland presses the packing, the rotating shaft is also sleeved with a seal ring arranged between the packing and the gland. The seal ring is a fluorocarbon rubber double lips type seal. The packing stuffing seal and the fluorocarbon rubber double lips type seal are combined for use, the double lips naturally open under the pressure of the gland, tightly joint to the surface of the shaft, and the seal effect is superior. The seal ring is also provided with a pluggable abutting port, convenient for mounting and changing.
Description
Technical field
The utility model relates to a kind of axle sealing structure, relates in particular to a kind of axle sealing structure that is used for centrifugal pump.
Background technique
Packing seal (packing) is a kind of Centrifugal water pump commonly used sealing, and packing seal is installed in the Stuffing box, and the outside is glanded to be pushed down.Gland sealed cross section commonly used is square, is made by PTFE, is provided with in Stuffing box and encloses around axle two.Contain graphite particle in the sealing that PTFE is made, have wear-resisting, heat-resisting performance, its effect is to stop water to overflow from axle.But find that in the middle of using process the gland sealed sealability is not fine, life cycle is not very long, how long useless, seepage will occur, has to frequently packing_seal be changed.Why can be like this, main cause has: 1) wear resistance of sealed material and corrosion-resistant cause in the axle rotary course packing seal wearing and tearing very fast.2) the packing filling sealing does not have adaptivity, in case the gap will appear in wearing and tearing, causes and leaks, and sealing effect is poor.
The model utility content
The technical problems to be solved in the utility model provides a kind of centrifugal pump that is used for, and can keep sealing for a long time, improves the axle sealing structure of sealing effect, to overcome the defective that exists in the prior art.
The utility model is by the following technical solutions:
A kind of axle sealing structure of centrifugal pump comprises outer casing, is filled in the packing between outer casing and the rotating shaft and seals the gland of outer casing, and described gland compresses packing, also is with seal ring in rotating shaft, is located between described packing and the gland.
Preferably, described seal ring is a lips mouth formula seal ring, and described lips mouth structure is adjacent to packing.
Preferably, the material of described seal ring is the carbon fluorine rubber.
Preferably, described seal ring is provided with the interface of butt joint.
The utility model changes two original circle packing_seals into a circle, adds a circle carbon fluorine rubber lips mouth sealing then in the packing outside, i.e. packing filling sealing and carbon fluorine rubber lips mouth seal combination are used.The sealing of carbon fluorine rubber lips mouth is high temperature resistant, corrosion-resistant, and has good elasticity, because the design of lips degree of lip-rounding formula, the lips mouth opens naturally under the pressure of gland, can very closely be fitted in the surface of axle, and sealing effect is better.Because the sealing of carbon fluorine rubber lips mouth contains carbon, have very little friction factor again, wear-resisting property is good, even a spot of wearing and tearing are arranged, still can very closely be fitted in the surface of axle under the pressure of gland, has improved sealability.This kind seal ring is provided with the interface that can plug butt joint, the convenient installation and replacing.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the sectional view of carbon fluorine rubber lips mouth sealing in the utility model.
Fig. 3 is the plan view of carbon fluorine rubber lips mouth sealing.
Fig. 4 is the part side view of carbon fluorine rubber lips mouth sealing.
Embodiment
As shown in Figure 1, the utility model comprises outer casing 5, packing 1 (packing seal), seal ring 3 and gland 4.Outer casing 5 is as the filler cavity volume, and packing 1 is filled between outer casing 5 and the intermediate rotary shaft 2, and gland 4 can seal outer casing 5, also compresses the filler in the casing simultaneously.Between packing 1 and gland 4, also be with seal ring 3, lips notch portion next-door neighbour packing 1.Sealing circle 3 is the sealing of carbon fluorine rubber lips mouth, and under the effect of gland 4, the lips mouth can open by nature, is close on the surface of rotating shaft 2, unites the effect of playing sealing with packing 1.The utility model changes two original circle packing_seals into a circle, adds a circle carbon fluorine rubber lips mouth sealing then in the packing outside, i.e. packing filling sealing and carbon fluorine rubber lips mouth seal combination are used.The sealing of carbon fluorine rubber lips mouth is high temperature resistant, corrosion-resistant, and has good elasticity, because the design of lips degree of lip-rounding formula, the lips mouth opens naturally under the pressure of gland, can very closely be fitted in the surface of axle, and sealing effect is better.Because the sealing of carbon fluorine rubber lips mouth contains carbon, have very little friction factor again, wear-resisting property is good, even a spot of wearing and tearing are arranged, still can very closely be fitted in the surface of axle under the pressure of gland, has improved sealability.This kind seal ring is provided with the interface that can plug butt joint, the convenient installation and replacing.
The manufactured size of packing and the sealing of carbon fluorine rubber lips mouth is determined according to the rotating shaft external diameter.When needing to change filler, earlier original packing seal is all drawn out, cleaning axle sleeve surface is coated with a spot of butter, to strengthen its greasy property on axle sleeve and packing; Then packing one is enclosed around the shaft, according to the diameter cutting-out packing of rotating shaft, the packing fracture will be done angular cut; Then load onto packing one, put carbon fluorine rubber lips mouth sealing ring, load onto gland in the packing outside.Notice that the gland degree of tightness needs appropriateness, if press ground too tight, packing and the sealing of lips mouth are easy to wear; If press too pine of ground, leak easily.
Claims (4)
1. the axle sealing structure of a centrifugal pump comprises outer casing, is filled in the packing between outer casing and the rotating shaft and seals the gland of outer casing, and described gland compresses packing, it is characterized in that: also be with seal ring in rotating shaft, be located between described packing and the gland.
2. the axle sealing structure of centrifugal pump according to claim 1, it is characterized in that: described seal ring is a lips mouth formula seal ring, and described lips mouth structure is adjacent to packing.
3. the axle sealing structure of centrifugal pump according to claim 1, it is characterized in that: the material of described seal ring is the carbon fluorine rubber.
4. the axle sealing structure of centrifugal pump according to claim 1, it is characterized in that: described seal ring is provided with the interface of butt joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201543715U CN201288691Y (en) | 2008-10-23 | 2008-10-23 | Shaft sealing structure for centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201543715U CN201288691Y (en) | 2008-10-23 | 2008-10-23 | Shaft sealing structure for centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201288691Y true CN201288691Y (en) | 2009-08-12 |
Family
ID=40980373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201543715U Expired - Fee Related CN201288691Y (en) | 2008-10-23 | 2008-10-23 | Shaft sealing structure for centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201288691Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316978A (en) * | 2013-07-16 | 2013-09-25 | 南京三邦金属复合材料有限公司 | Thick-wall large-diameter multi-wave expansion joint manufacturing method |
-
2008
- 2008-10-23 CN CNU2008201543715U patent/CN201288691Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316978A (en) * | 2013-07-16 | 2013-09-25 | 南京三邦金属复合材料有限公司 | Thick-wall large-diameter multi-wave expansion joint manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20131023 |