EP0966611B1 - Pumpe mit wellenabdichtung - Google Patents
Pumpe mit wellenabdichtung Download PDFInfo
- Publication number
- EP0966611B1 EP0966611B1 EP98912460A EP98912460A EP0966611B1 EP 0966611 B1 EP0966611 B1 EP 0966611B1 EP 98912460 A EP98912460 A EP 98912460A EP 98912460 A EP98912460 A EP 98912460A EP 0966611 B1 EP0966611 B1 EP 0966611B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- shaft
- gas
- seal
- space
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 description 22
- 239000012530 fluid Substances 0.000 description 6
- 238000010926 purge Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C27/009—Shaft sealings specially adapted for pumps
Definitions
- the invention relates a liquid ring gas pump according to the preamble of claim 1.
- a liquid ring gas pump is off US-A-4 747 752 known.
- the invention has for its object the specified To avoid disadvantages.
- the solution according to the invention consists in the features of the claim 1 and preferably that of the subclaims. After that are shaft seal and shaft bearing by a closed Separated space between one another with regard to the connection of the intermediate space with the shaft bearing geodetically low-lying point with a vacuum space the pump is connected. This ensures that Do not transfer any leakage fluid to the shaft bearing can before it is suctioned off.
- the space is advantageously with a gas supply connection provided that open to the atmosphere or on a suitable gas source is connected.
- the pump as a gas pump, this can be the pressure side his.
- the combination of suction and gas supply leads to the effect of flushing the space. by virtue of the pressure difference between the suction and the gas source the purging gas flows through the intermediate space. The concentration any leakage gas in the atmosphere of the space is reduced and the leakage is reduced to the pump is accelerated.
- the vacuum chamber of the pump should also include those with the pump related spaces that are understood for such a connection are suitable, for example the suction line.
- a vacuum room one is also possible, which leads to atmospheric or superatmospheric pressure, if the gas supply from a room is correspondingly higher Pressure is taken.
- the space can then vary depending on the Pressure drop in the gas supply and suction a super-atmospheric Accept pressure. This is harmless, especially if a seal between the gap and the shaft bearing is arranged, the shaft bearing in front of a depending on the location the case of excessive gas flow from the gap protects.
- the Pressure in the space kept at about atmospheric pressure or is slightly less so that a flow from the space to Shaft seal is essentially prevented.
- the amount of purge gas is expediently set so that the desired function is guaranteed, the pump operation but this is not significantly burdened.
- the setting of the The amount of purge gas is determined by defining the flow cross-sections and the applied pressure difference.
- Pumps used to convey mixed gases and liquids are suitable, for example liquid ring gas pumps.
- the Intermediate space expediently on the one hand with the suction side and on the other hand connected to the pressure side.
- the junction should be selected on the print side (e.g. in upper part of the liquid separator) that no operating fluid can enter the connecting line.
- This Connection type can be used for pumps for vacuum operation as well applied to pumps for pressure operation.
- the connecting line of the intermediate space is advantageously to the vacuum chamber of the pump at least partially transparent or with a sensor, so that any leaking Operating fluid and the need for repair Seal can be seen.
- the application of the invention is also particularly advantageous in Connection with such shaft seals, where design-related leakage must be expected or leakage with comparatively high probability can occur like Stuffing boxes.
- the invention is a prevents leakage outside the pump.
- the mechanical seal 4 is in the area of a shaft sleeve 6 arranged together with the hub of the impeller 2nd is secured by a shaft nut 7.
- the housing forms around the outer end of the mechanical seal or the shaft sleeve 6 and the mother 7 an annular space 8, the so-called Space forms and on which the shaft bearing 5 connects that of the annular space 8 by an arrangement of Lip seals 9 is separated.
- connection bore 10 Contains in the geodetically lowest area of the annular space 8 the housing has a connection bore 10, which is not shown in Way connected to the suction side of the liquid ring gas pump is.
- the connection can be made by an external Pipeline or one located within the housing walls Drilling.
- the connection point at which the hole 10 opens into the annular space 8 is in any case lower than that Place where any liquid from the annular space 8 to Shaft bearing 5 could overflow. That is the deepest Place the hole in the between the annular space 8 and the bearing 5 located housing collar 12 if no seals 9 are provided. In the presence of the seals 9 this is the lowest point of the circumference of the shaft 3 in the area of the annulus 8.
- the housing forming the annular space 8 contains one Gas supply port 11, which is optional with the atmosphere or the pressure side of the pump is connected. By the adjacent Pressure difference results in a constant gas flushing of the Annular space 8.
- the shaft seal 4 approximately emerging gaseous or liquid medium together with the purge gas flow returned to the compressor. An environmental impact through escaping conveying gas or operating fluid is avoided.
- the machine can still work for a short time continue to operate because the leakage current due to the Flushing the annulus is returned to the compressor. To the machine remains tight on the outside.
- the axial length is the construction is low. That is correspondingly low Construction volume and the mass of the pump.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
Claims (6)
- Flüssigkeitsringgaspumpe mit einer Welle (3), einer Wellendichtung (4), einem außerhalb der Wellendichtung (4) auf die Welle (3) wirkenden Wellenlager (5) und einem Zwischenraum (8) zwischen der Wellendichtung (4) und dem Wellenlager (5), dadurch gekennzeichnet, daß das Wellenlager (5) durch eine geringeren Dichtheitsanforderungen als die Wellendichtung (4) genügende weitere Dichtung (9) von dem geschlossen ausgeführten Zwischenraum (8) abgeschirmt ist und der Zwischenraum (8) einerseits an einer Stelle, die im bestimmungsgemäßen Betrieb tiefer liegt als seine von der weiteren Dichtung (9) abgedichtete Verbindung zum Wellenlager (5), mit einem Unterdruckraum der Pumpe verbunden und andererseits mit einem Gaszuführungsanschluß (11) versehen ist.
- Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Gaszuführungsanschluß (11) mit der Druckseite der als Gaspumpe ausgebildeten Pumpe verbunden ist.
- Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Gaszuführungsanschluß (11) zur Atmosphäre hin offen ist.
- Pumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in der Verbindungsleitung zwischen dem Zwischenraum (8) und dem Unterdruckraum der Pumpe und/oder der Druckseite der Pumpe ein Rückschlagventil angeordnet ist.
- Pumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Verbindungsleitung zum Unterdruckraum der Pumpe wenigstens teilweise transparent ist.
- Installierte Flüssigkeitsringpumpe mit den Merkmalen eines der Ansprüche 1 bis 5.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29704403U | 1997-03-11 | ||
DE29704403U DE29704403U1 (de) | 1997-03-11 | 1997-03-11 | Pumpe mit Wellenabdichtung |
PCT/EP1998/001365 WO1998040628A1 (de) | 1997-03-11 | 1998-03-10 | Pumpe mit wellenabdichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0966611A1 EP0966611A1 (de) | 1999-12-29 |
EP0966611B1 true EP0966611B1 (de) | 2004-06-16 |
Family
ID=8037287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98912460A Expired - Lifetime EP0966611B1 (de) | 1997-03-11 | 1998-03-10 | Pumpe mit wellenabdichtung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0966611B1 (de) |
AT (1) | ATE269493T1 (de) |
DE (2) | DE29704403U1 (de) |
ES (1) | ES2221161T3 (de) |
WO (1) | WO1998040628A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005033707A1 (de) * | 2005-07-19 | 2007-02-01 | Valeo Compressor Europe Gmbh | Vereinfachte, innenbeaufschlagte Axialgleitringdichtung für die CO2-Anwendung |
CN102678610B (zh) * | 2012-05-29 | 2015-04-08 | 上海深井泵厂有限公司 | 用于泵的辅助密封装置、长轴泵及无泄漏检修方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1570512A (en) * | 1976-09-04 | 1980-07-02 | Howden Compressors Ltd | Meshing-screw gas-compressing apparatus |
US4747752A (en) * | 1987-04-20 | 1988-05-31 | Somarakis, Inc. | Sealing and dynamic operation of a liquid ring pump |
US4781553A (en) * | 1987-07-24 | 1988-11-01 | Kabushiki Kaisha Kobe Seiko Sho | Screw vacuum pump with lubricated bearings and a plurality of shaft sealing means |
DE4229017C2 (de) * | 1992-09-03 | 1995-05-24 | Sihi Gmbh & Co Kg | Flüssigkeitsringverdichter in Motorblock- oder Motorträgerausführung |
SE502099C2 (sv) * | 1992-12-21 | 1995-08-14 | Svenska Rotor Maskiner Ab | skruvkompressor med axeltätning |
DE4310740A1 (de) * | 1993-04-01 | 1994-10-06 | Knorr Bremse Ag | Schraubenkompressor, insbesondere zum Intervallbetrieb |
-
1997
- 1997-03-11 DE DE29704403U patent/DE29704403U1/de not_active Expired - Lifetime
-
1998
- 1998-03-10 ES ES98912460T patent/ES2221161T3/es not_active Expired - Lifetime
- 1998-03-10 WO PCT/EP1998/001365 patent/WO1998040628A1/de active IP Right Grant
- 1998-03-10 AT AT98912460T patent/ATE269493T1/de not_active IP Right Cessation
- 1998-03-10 DE DE59811580T patent/DE59811580D1/de not_active Expired - Lifetime
- 1998-03-10 EP EP98912460A patent/EP0966611B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE29704403U1 (de) | 1998-08-13 |
EP0966611A1 (de) | 1999-12-29 |
DE59811580D1 (de) | 2004-07-22 |
ES2221161T3 (es) | 2004-12-16 |
WO1998040628A1 (de) | 1998-09-17 |
ATE269493T1 (de) | 2004-07-15 |
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