SE8804063L - SHUTTER VALVE FOR VACUUM PUMPS - Google Patents
SHUTTER VALVE FOR VACUUM PUMPSInfo
- Publication number
- SE8804063L SE8804063L SE8804063A SE8804063A SE8804063L SE 8804063 L SE8804063 L SE 8804063L SE 8804063 A SE8804063 A SE 8804063A SE 8804063 A SE8804063 A SE 8804063A SE 8804063 L SE8804063 L SE 8804063L
- Authority
- SE
- Sweden
- Prior art keywords
- valve
- tappet
- partition
- chamber
- shut
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Check Valves (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to a shut-off valve (check valve) for oil-sealed vacuum pumps. It is accommodated in a valve housing (valve body) which is attached to the pump housing and which, by means of a fixed partition, is divided into a valve chamber, which accommodates the valve disc, the valve tappet and a pressure spring, and a swept chamber which contains the tappet, the piston and a pressure spring (compression spring). For the purpose of the passage of the tappet, the partition has a bore slide fit. The tappet is provided with a venting duct which is composed of a radial and an axial section, the latter at its front end being fitted with a nozzle. On that section of the tappet which is situated in the valve chamber, a thrust collar is permanently fixed at a distance from the partition which equals the travel. Used as the sealing element there is a seal ring bearing on the thrust collar. Next to the partition, a second oil draining hole fitted with a nozzle runs into the swept chamber. The shut-off valve does not have any dynamically stressed sealing elements. As a result, its susceptibility (proneness) to faults is low. It closes very rapidly, admitting little air, as a result of which a better vacuum is ensured.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD31434388A DD271358B5 (en) | 1988-04-04 | 1988-04-04 | Shut-off valve for vacuum pumps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8804063D0 SE8804063D0 (en) | 1988-11-10 |
| SE8804063L true SE8804063L (en) | 1989-10-05 |
Family
ID=5598155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8804063A SE8804063L (en) | 1988-04-04 | 1988-11-10 | SHUTTER VALVE FOR VACUUM PUMPS |
Country Status (3)
| Country | Link |
|---|---|
| DD (1) | DD271358B5 (en) |
| DE (1) | DE3838410A1 (en) |
| SE (1) | SE8804063L (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355590A (en) * | 2017-07-18 | 2017-11-17 | 上海航天控制技术研究所 | A kind of extraction valve frock and its air extracting seal method |
-
1988
- 1988-04-04 DD DD31434388A patent/DD271358B5/en active IP Right Maintenance
- 1988-11-10 SE SE8804063A patent/SE8804063L/en not_active Application Discontinuation
- 1988-11-12 DE DE19883838410 patent/DE3838410A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE8804063D0 (en) | 1988-11-10 |
| DD271358B5 (en) | 1996-01-25 |
| DE3838410A1 (en) | 1989-10-12 |
| DD271358A1 (en) | 1989-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAV | Patent application has lapsed |
Ref document number: 8804063-9 Effective date: 19910601 |