CN2895904Y - Leakage-proof type vacuum motive seal - Google Patents
Leakage-proof type vacuum motive seal Download PDFInfo
- Publication number
- CN2895904Y CN2895904Y CN 200620101652 CN200620101652U CN2895904Y CN 2895904 Y CN2895904 Y CN 2895904Y CN 200620101652 CN200620101652 CN 200620101652 CN 200620101652 U CN200620101652 U CN 200620101652U CN 2895904 Y CN2895904 Y CN 2895904Y
- Authority
- CN
- China
- Prior art keywords
- oil
- oil chamber
- shoe cream
- cream room
- lasso
- 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
Links
Abstract
The utility model is a leakage-proof type vacuum motive seal, including oil chamber arranged round shaft in machine body, oil seal at side of oil chamber and running fit to shaft, a spiral fusiform ferrule is fixed to bush which is fixed to the shaft and between oil chamber and oil seal, spiral fusiform ferrule points to oil chamber following pressure direction coming from shaft rotation. The utility model has a spiral fusiform ferrule and oil seal with same structure at two sides of oil chamber, spiral fusiform ferrule points to oil chamber following pressure direction coming from shaft rotation, spiral fusiform ferrule pumps excrescent lubricant outside the shaft to oil chamber continuously following shaft rotation, keeps lubricant inside oil seal at the station with low quantity and low pressure, achieves good dynamic sealing effect.
Description
Technical field:
The utility model relates to pumping equipment, particularly the improvement of movable sealing structure.
Background technique:
Structure is as shown in Figure 1 adopted in the motive sealing of existing various vacuum equipments usually, and two rubber oil seas 5 comprising at shoe cream room 4 two ends are full of lubricant oil in the shoe cream room in the work.The shortcoming of this structure is; After through the long period operation, two rubber oil seas unavoidably can produce wearing and tearing, and leakage of oil often takes place oil sealing, and lubricating oil consumption is big, and influence is normally used, and also pollute working environment simultaneously.So need often to change oil sealing, and the oil sealing of replacing axle is a pretty troublesome job in many cases.
Summary of the invention:
Even the purpose of this utility model provides the vacuum dynamic seal that a kind of oil sealing wearing and tearing also can keep excellent sealing.
The utility model anti-leak type vacuum dynamic seal structure, comprise and be arranged in the body shoe cream room around the rotating shaft and be positioned at the shoe cream room sidepiece and with respect to rotating shaft oil sealing movingly, it is characterized in that being placed in to be connected on the rotating shaft axle sleeve consolidating between shoe cream room and the oil sealing to have scroll shape lasso, institute's direction of exerting pressure that produces pointed to shoe cream room when the scroll of this lasso rotated with rotating shaft.
The scroll shape lasso and the oil sealing of same structure can all be set in the shoe cream room both sides.
Above-mentioned scroll shape lasso has an axial hole at least, and the pump oil mass of the quantity of through hole and aperture scroll shape lasso during by machine run is decided greater than the oil mass of the described through hole of flowing through.
The utility model all is provided with the scroll shape lasso and the oil sealing of same structure in the shoe cream room both sides, institute's direction of exerting pressure that produces pointed to shoe cream room when the scroll of lasso rotated with rotating shaft, when scroll shape lasso turns round with rotating shaft with its outside unnecessary lubricant oil ceaselessly pump to shoe cream room, make the lubricant oil of oil sealing inboard remain on a small amount of and low oil pressure state, produce good motive sealing effect.Find in the experiment that use the utility model structure, even the oil sealing serious wear, still unlubricated oil leaks under high speed rotating.
Description of drawings:
Fig. 1 is existing movable sealing structure figure.
Fig. 2 is the utility model example structure figure.
Embodiment:
With reference to Fig. 2, example structure is used for the motive sealing of vacuum pump.Be shaped on annular shoe cream room 4 around rotating shaft 8, shoe cream room 4 is communicated with lubricating cup by the oil duct of opening in body 21; The lasso with scroll shape 6,10 that is fixed on the axle sleeve 3 is set in shoe cream room 4 both sides, install with respect to rotating shaft oil sealing 5,9 movingly in the relative outside of lasso 6,10 again, the lasso 6,10 with scroll shape respectively and the clearance space between the oil sealing 5,9 constitute low pressure area.Making and lasso is being installed at 6,10 o'clock, institute's direction of exerting pressure that produces pointed to a shoe cream room 4 and is as the criterion when lasso scroll direction should be rotated with rotating shaft 8, when having a machine in operation lasso 6,10 with the lubricant oil in two low pressure areas ceaselessly pump to shoe cream room 4; Because the opposite side of oil sealing 9 is the vacuum suction chamber, so the raising that structure of the present invention more helps degree of vacuum has been installed.The oil seal cover 2 that body comprises the pump housing and is threaded with it.
For being evacuated, the lubricant oil that prevents two oil sealing inboards cause oil sealing dry grinding to take place and premature damage, each has an axial hole 7 at least at above-mentioned scroll shape lasso, so that the parts of lubricating oil in the shoe cream room 4 flow back to the lasso outside, the inside pump oil mass of the quantity of through hole 7 or aperture scroll shape lasso 6,10 during by machine run is decided greater than the oil mass of the described through hole of flowing through.
Claims (4)
1, a kind of anti-leak type vacuum dynamic seal, comprise be arranged on the interior rotating shaft of body (2) (8) on every side shoe cream room (4) and be positioned at shoe cream room (4) sidepiece and with respect to rotating shaft (8) oil sealing (5) movingly, it is characterized in that being positioned at being connected on the axle sleeve (3) that consolidating between shoe cream room (4) and the oil sealing (5) be placed in rotating shaft (8) and have scroll shape lasso (6), institute's direction of exerting pressure that produces pointed to shoe cream room (4) when the scroll of this lasso rotated with rotating shaft (8).
2, anti-leak type vacuum dynamic seal according to claim 1, it is characterized in that shoe cream room (4) both sides all are provided with the scroll shape lasso (6,10) and the oil sealing (5,9) of same structure, institute's direction of exerting pressure that produces pointed to shoe cream room (4) when the scroll of lasso (6,10) rotated with rotating shaft (8).
3, anti-leak type vacuum dynamic seal according to claim 1 is characterized in that scroll shape lasso has an axial hole (7) at least.
4, anti-leak type vacuum dynamic seal according to claim 3, the pump oil mass of scroll shape lasso (10) is decided greater than the oil mass of the described through hole of flowing through when it is characterized in that the quantity of through hole (7) and aperture by machine run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620101652 CN2895904Y (en) | 2006-03-14 | 2006-03-14 | Leakage-proof type vacuum motive seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620101652 CN2895904Y (en) | 2006-03-14 | 2006-03-14 | Leakage-proof type vacuum motive seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2895904Y true CN2895904Y (en) | 2007-05-02 |
Family
ID=38065480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620101652 Expired - Fee Related CN2895904Y (en) | 2006-03-14 | 2006-03-14 | Leakage-proof type vacuum motive seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2895904Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824965A (en) * | 2010-04-06 | 2010-09-08 | 中国石油大学(北京) | Hydraulic pulse cavitating jet generation device |
| CN105299231A (en) * | 2015-11-10 | 2016-02-03 | 中国工程物理研究院激光聚变研究中心 | Vacuum rotation sealing device |
-
2006
- 2006-03-14 CN CN 200620101652 patent/CN2895904Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824965A (en) * | 2010-04-06 | 2010-09-08 | 中国石油大学(北京) | Hydraulic pulse cavitating jet generation device |
| CN101824965B (en) * | 2010-04-06 | 2013-01-16 | 中国石油大学(北京) | Hydraulic pulse cavitating jet generation device |
| CN105299231A (en) * | 2015-11-10 | 2016-02-03 | 中国工程物理研究院激光聚变研究中心 | Vacuum rotation sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |