CN211314547U - Composite lip-shaped sealing structure of inner shaft seal of Roots pump - Google Patents
Composite lip-shaped sealing structure of inner shaft seal of Roots pump Download PDFInfo
- Publication number
- CN211314547U CN211314547U CN201922334072.0U CN201922334072U CN211314547U CN 211314547 U CN211314547 U CN 211314547U CN 201922334072 U CN201922334072 U CN 201922334072U CN 211314547 U CN211314547 U CN 211314547U
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- China
- Prior art keywords
- lip
- seal
- pump
- inner shaft
- roots pump
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- 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 composite lip seal structure of a Roots pump inner shaft seal, which comprises a Roots pump vacuum pump, wherein an inner shaft is arranged inside the Roots pump vacuum pump, a labyrinth seal is arranged outside the inner shaft, and a second lip seal is arranged at the side of the labyrinth seal; the utility model discloses be provided with first lip and seal, and first lip seals the skeleton oil blanket of the fluororubber lip that is good for elasticity, in one side of contact lubricating oil, effectively blocks the leakage of lubricating oil, is provided with the second lip and seals, and the second lip seals and comprises stainless steel skeleton and the PTFE seal lip that is applicable to dry friction, in pump chamber contact medium one side, effectively resists the infringement of medium, and the axle sleeve is stainless steel, the outer lane of axle sleeve is provided with ceramic coating for friction surface hardness is high, and reducing wear, and smooth finish are good, reduce the frictional heat, can protect the oil tank not receive the pollution of process medium, can be used to take out vapor, the application during chemical industry gas and organic solvent steam.
Description
Technical Field
The utility model belongs to the technical field of roots vacuum pump, concretely relates to compound lip seal structure of bearing seal in roots pump.
Background
The Roots vacuum pump (Roots pump for short) is a variable displacement vacuum pump in which two blade-shaped rotors rotating synchronously in opposite directions are installed in the pump, and small gaps are formed among the rotors and between the rotors and the inner wall of a pump shell so as not to contact each other. The Roots vacuum pump is tested for long-term operation on devices such as petroleum, chemical engineering, plastics, pesticides, dynamic balance of a steam turbine rotor, aerospace space simulation and the like, and therefore, the Roots vacuum pump is expected to be widely popularized and applied in China. And can be widely used in petroleum, chemical, metallurgy, textile and other industries.
Then the sealing effect of the inner shaft of the existing roots vacuum pump is not good, which easily causes the leakage of lubricating oil and the invasion of medium, therefore, a composite lip-shaped sealing structure of the inner shaft seal of the roots pump is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a composite lip seal structure of axis seal in lobe pump to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a compound lip seal structure of bearing seal in lobe pump, includes the lobe pump vacuum pump, the internally mounted of lobe pump vacuum pump has interior axle, the outside of interior axle sets up labyrinth seal, labyrinth seal's avris is provided with the second lip and seals, the avris that the second lip sealed is provided with the spacer ring, the avris of spacer ring is provided with the first lip and seals, the inside of first lip seal, second lip seal and spacer ring is provided with the axle sleeve, the axle sleeve sets up in the outside of interior axle, the inboard of axle sleeve tip is through being provided with the sealing washer, the avris of axle sleeve sets up the bearing in addition, the bearing is installed in the outside of interior axle.
Preferably, the inner side of the labyrinth seal is designed into an annular structure, and the annular structure inside the labyrinth seal is distributed at equal intervals.
Preferably, the shaft sleeve is made of stainless steel, and the outer ring of the shaft sleeve is provided with a ceramic coating.
Preferably, the outer side of the first lip seal is designed to be circular, and the first lip seal is designed to be made of fluororubber.
Preferably, the outer side of the second lip seal is designed to be circular, and the second lip seal is made of polytetrafluoroethylene.
Compared with the prior art, the beneficial effects of the utility model are that: be provided with first lip and seal, and first lip seals the skeleton oil blanket for the fluororubber lip that elasticity is good, in one side of contact lubricating oil, effectively blocks the leakage of lubricating oil, is provided with the second lip and seals, and the second lip seals and comprises stainless steel skeleton and the PTFE seal lip that is applicable to dry friction, in pump chamber contact medium one side, effectively resists the infringement of medium, and the axle sleeve is stainless steel matter, the outer lane of axle sleeve is provided with ceramic coating for friction surface hardness is high, reducing wear, and smooth finish is good, reduces frictional heat, can protect the oil tank not receive the pollution of process medium, can be used to take out the applied occasion when absorbing water vapour, chemical industry gas and organic solvent steam.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of the internal structure of the Roots pump vacuum pump of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the installation structure of the labyrinth seal of FIG. 2 according to the present invention;
in the figure: 1. a Roots pump vacuum pump; 2. an inner shaft; 3. a labyrinth seal; 4. a shaft sleeve; 5. a seal ring; 6. a first lip seal; 7. a second lip seal; 8. a space ring; 9. and a bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a compound lip seal structure of shaft seal in lobe pump, including lobe pump vacuum pump 1, interior axle 2 is installed to the internally mounted of lobe pump vacuum pump 1, the outside of interior axle 2 sets up labyrinth seal 3, labyrinth seal 3's avris is provided with second lip and seals 7, the avris that second lip sealed 7 is provided with spacer ring 8, the avris of spacer ring 8 is provided with first lip and seals 6, first lip seals 6, the inside of second lip seal 7 and spacer ring 8 is provided with axle sleeve 4, axle sleeve 4 sets up in the outside of interior axle 2, the inboard of axle sleeve 4 tip is through being provided with sealing washer 5, the avris of axle sleeve 4 sets up bearing 9 in addition, bearing 9 installs in the outside of interior axle 2.
The inner side of the labyrinth seal 3 is designed into an annular structure, the inner sides of the labyrinth seal 3 are distributed in an annular shape at equal intervals, a series of closure gaps and expansion cavities are formed among the annular grooves, and the sealed medium generates a throttling effect when passing through the gaps of the zigzag labyrinth to achieve the purpose of leakage resistance.
The shaft sleeve 4 is made of stainless steel, and the outer ring of the shaft sleeve 4 is provided with a ceramic coating, so that the friction surface is high in hardness, abrasion is reduced, the smoothness is good, and friction heat is reduced.
The outer side of the first lip seal 6 is designed to be circular, the first lip seal 6 is made of fluororubber, the first lip seal 6 is a skeleton oil seal of a fluororubber lip with good elasticity, and the lubricating oil is effectively prevented from leaking on the side contacting the lubricating oil.
The outer side of the second lip seal 7 is designed to be circular, the second lip seal 7 is made of polytetrafluoroethylene, the second lip seal 7 is composed of a stainless steel framework and a PTFE sealing lip suitable for dry friction, and the pump cavity is in contact with a medium and effectively resists invasion of the medium.
The utility model discloses a theory of operation and use flow: when the device is used, a first lip seal 6 and a second lip seal 7 are tightly wrapped on a shaft sleeve 4, the shaft sleeve 4 and an inner shaft 2 are sealed by a sealing ring 5 and synchronously rotate with the inner shaft 2, a process medium can be effectively sealed and isolated from an oil tank when the device rotates at a high speed, the first lip seal 6 is a skeleton oil seal of a fluororubber lip with good elasticity, the leakage of the lubricating oil is effectively blocked on one side contacting with the lubricating oil, the second lip seal 7 consists of a stainless steel framework and a PTFE (polytetrafluoroethylene) sealing lip suitable for dry friction, the invasion of the medium is effectively resisted on one side contacting with the medium in a pump cavity, the shaft sleeve 4 is made of stainless steel, and a ceramic coating is arranged on the outer ring of the shaft sleeve 4, so that the hardness of a friction surface is high, the abrasion is reduced, the smoothness is good.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a compound lip seal structure of axis seal in lobe pump, includes lobe pump vacuum pump (1), its characterized in that: the utility model discloses a roots pump vacuum pump, including roots pump vacuum pump (1), internally mounted has interior axle (2), the outside of interior axle (2) sets up labyrinth seal (3), the avris of labyrinth seal (3) is provided with second lip and seals (7), the avris that second lip seals (7) is provided with spacer ring (8), the avris of spacer ring (8) is provided with first lip and seals (6), the inside of first lip seal (6), second lip seal (7) and spacer ring (8) is provided with axle sleeve (4), axle sleeve (4) set up in the outside of interior axle (2), the inboard of axle sleeve (4) tip is through being provided with sealing washer (5), the avris of axle sleeve (4) sets up bearing (9) in addition, the outside in interior axle (2) is installed in bearing (9).
2. The composite lip-shaped sealing structure of the inner shaft seal of the roots pump as claimed in claim 1, wherein: the inner side of the labyrinth seal (3) is designed to be of an annular structure, and the annular inner side of the labyrinth seal (3) is distributed at equal intervals.
3. The composite lip-shaped sealing structure of the inner shaft seal of the roots pump as claimed in claim 1, wherein: the shaft sleeve (4) is made of stainless steel, and the outer ring of the shaft sleeve (4) is provided with a ceramic coating.
4. The composite lip-shaped sealing structure of the inner shaft seal of the roots pump as claimed in claim 1, wherein: the outer side of the first lip seal (6) is designed to be circular, and the first lip seal (6) is designed to be made of fluororubber.
5. The composite lip-shaped sealing structure of the inner shaft seal of the roots pump as claimed in claim 1, wherein: the outer side of the second lip seal (7) is designed to be circular, and the second lip seal (7) is made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922334072.0U CN211314547U (en) | 2019-12-23 | 2019-12-23 | Composite lip-shaped sealing structure of inner shaft seal of Roots pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922334072.0U CN211314547U (en) | 2019-12-23 | 2019-12-23 | Composite lip-shaped sealing structure of inner shaft seal of Roots pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211314547U true CN211314547U (en) | 2020-08-21 |
Family
ID=72058483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922334072.0U Expired - Fee Related CN211314547U (en) | 2019-12-23 | 2019-12-23 | Composite lip-shaped sealing structure of inner shaft seal of Roots pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211314547U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949750A (en) * | 2023-03-10 | 2023-04-11 | 江苏洁维生物设备股份有限公司 | Bioreactor (mixing) shaft sealing device |
-
2019
- 2019-12-23 CN CN201922334072.0U patent/CN211314547U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949750A (en) * | 2023-03-10 | 2023-04-11 | 江苏洁维生物设备股份有限公司 | Bioreactor (mixing) shaft sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 Termination date: 20201223 |