CN203627225U - Double-sealing structure of roots pump shaft - Google Patents
Double-sealing structure of roots pump shaft Download PDFInfo
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- CN203627225U CN203627225U CN201320652086.7U CN201320652086U CN203627225U CN 203627225 U CN203627225 U CN 203627225U CN 201320652086 U CN201320652086 U CN 201320652086U CN 203627225 U CN203627225 U CN 203627225U
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- sealing
- gland
- oil
- sealing structure
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Abstract
The utility model aims at disclosing a double-sealing structure of a roots pump shaft. The double-sealing structure comprises an air-sealing gland and an oil-sealing device, wherein the oil-sealing device is arranged in a shaft sealing cavity and is connected with a shaft sleeve I of a pump body through an oil-sealing lip opening; the air-sealing gland is arranged at the upper end of the oil-sealing lip opening and is positioned between the oil-sealing lip opening and the shaft sleeve I. Compared with the prior art, a piston ring and the oil-sealing device form the double-sealing structure, so that a sealing effect is effectively achieved, and the problems in the prior art are solved; the double-sealing structure of the roots pump shaft is simple and very practical and can fulfill the aims of the utility model.
Description
Technical field
The utility model relates to a kind of axle sealing structure, particularly a kind of Roots's pump shaft double sealing structure.
Background technique
In the prior art, Roots's pump shaft is by sliding plug ring sealing, due to piston ring self and and relatively rotating parts between gapped, and in pump when running pump housing, can form vacuum, and bearing one side still keeps the normal shape of barometric pressure, therefore, the lubricant oil of bearing side can flow to the pump housing because of pressure reduction, causes following problem:
1, bearing bore lacks lubricant oil, and bearing damage further causes pump to damage;
2, vacuum pump chamber is interior under high vacuum, is caused that oil vapor backflows by after oil pollution, pollutes the vacuum system of being taken out, and causes product rejection;
3, in pump chamber, have after oil, be easily stained with dirt, easily fouling, causes that in pump chamber, two rotors are stuck, causes damage parts in pump.
In addition, in the time that the pressure of pump chamber and bearing bore reaches balance, if pumped gas is corrosive gas, gas can enter bearing bore by gap, corrosion bearing, cause bearing damage, when pump stops, when water washery pump inner chamber, water enters bearing bore from gap, cause bearing lubrication to lose efficacy, get rusty, bearing damage, further causes the accident that pump is damaged.
Therefore, need especially a kind of Roots's pump shaft double sealing structure, to solve the above-mentioned existing problem existing.
Model utility content
The purpose of this utility model is to provide a kind of Roots's pump shaft double sealing structure, for the deficiencies in the prior art, adopts double sealing structure, and the generation of effectively stopping above-mentioned phenomenon is simple in structure, very practical.
The technical problem that the utility model solves can realize by the following technical solutions:
A kind of Roots's pump shaft double sealing structure, it is characterized in that, it comprises a sealing gland gland and an oil-sealing arrangement, described oil-sealing arrangement is arranged in shaft seal cavity, described oil-sealing arrangement is connected with the axle sleeve first of the pump housing by an oil seal lip, be provided with described sealing gland gland in the upper end of described oil seal lip, described sealing gland gland is arranged between described oil seal lip and described axle sleeve first.
In an embodiment of the present utility model, described oil seal lip is arranged in described axle sleeve first with certain bend angle.
In an embodiment of the present utility model, described oil seal lip is fixed by described sealing gland gland.
In an embodiment of the present utility model, in described axle sleeve first, be also provided with piston ring.
In an embodiment of the present utility model, described sealing gland gland is fixed on the pump housing by socket head screw.
Roots's pump shaft double sealing structure of the present utility model, compared with prior art, forms double sealing structure by piston ring and oil-sealing arrangement, sealing gland gland can play the effect of sealing effectively, stops the problem that prior art exists, simple in structure, very practical, realize the purpose of this utility model.
Feature of the present utility model can be consulted the detailed description of the graphic and following better mode of execution of this case and be obtained and be well understood to.
Accompanying drawing explanation
Fig. 1 is the structural representation of Roots's pump shaft double sealing structure of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Embodiment
As shown in Figure 1, Roots's pump shaft double sealing structure of the present utility model, it comprises a sealing gland gland 100 and an oil-sealing arrangement 200, described oil-sealing arrangement 200 is arranged in shaft seal cavity 10, described oil-sealing arrangement 200 is connected with the axle sleeve first 30 of the pump housing 20 by an oil seal lip 210, be provided with described sealing gland gland 100 in the upper end of described oil seal lip 210, described sealing gland gland 100 is arranged between described oil seal lip 210 and described axle sleeve first 30.
In the present embodiment, described oil seal lip 210 is arranged in described axle sleeve first 30 with certain bend angle, makes oil seal lip 210 in axle sleeve first 30, have certain power.
In the present embodiment, described oil seal lip 210 is fixing by described sealing gland gland 100.
In the present embodiment, in described axle sleeve first 30, be also provided with piston ring 300.
In the present embodiment, described sealing gland gland 100 is fixed on the pump housing 20 by socket head screw 110.
Roots's pump shaft double sealing structure of the present utility model forms double sealing structure by piston ring 300 and oil-sealing arrangement 200, sealing gland gland 100 can play the effect of sealing effectively, stops the problem that prior art exists, simple in structure, very practical, realize the purpose of this utility model.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall within the scope of claimed the utility model, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. Roots's pump shaft double sealing structure, it is characterized in that, it comprises a sealing gland gland and an oil-sealing arrangement, described oil-sealing arrangement is arranged in shaft seal cavity, described oil-sealing arrangement is connected with the axle sleeve first of the pump housing by an oil seal lip, be provided with described sealing gland gland in the upper end of described oil seal lip, described sealing gland gland is arranged between described oil seal lip and described axle sleeve first, in described axle sleeve first, is also provided with piston ring.
2. Roots's pump shaft double sealing structure as claimed in claim 1, is characterized in that, described oil seal lip is arranged in described axle sleeve first with certain bend angle.
3. Roots's pump shaft double sealing structure as claimed in claim 1, is characterized in that, described oil seal lip is fixed by described sealing gland gland.
4. Roots's pump shaft double sealing structure as claimed in claim 1, is characterized in that, described sealing gland gland is fixed on the pump housing by socket head screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652086.7U CN203627225U (en) | 2013-10-22 | 2013-10-22 | Double-sealing structure of roots pump shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652086.7U CN203627225U (en) | 2013-10-22 | 2013-10-22 | Double-sealing structure of roots pump shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627225U true CN203627225U (en) | 2014-06-04 |
Family
ID=50813708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320652086.7U Expired - Fee Related CN203627225U (en) | 2013-10-22 | 2013-10-22 | Double-sealing structure of roots pump shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203627225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175480A (en) * | 2021-05-18 | 2021-07-27 | 杰锋汽车动力系统股份有限公司 | Hydrogen circulating pump bearing structure |
-
2013
- 2013-10-22 CN CN201320652086.7U patent/CN203627225U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175480A (en) * | 2021-05-18 | 2021-07-27 | 杰锋汽车动力系统股份有限公司 | Hydrogen circulating pump bearing structure |
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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: 20140604 Termination date: 20151022 |
|
| EXPY | Termination of patent right or utility model |