EP0966611B1 - Pompe avec garniture d'etancheite - Google Patents

Pompe avec garniture d'etancheite Download PDF

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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
Application number
EP98912460A
Other languages
German (de)
English (en)
Other versions
EP0966611A1 (fr
Inventor
Alfons JÜNEMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sterling Fluid Systems Germany GmbH
Original Assignee
Sterling Fluid Systems Germany GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sterling Fluid Systems Germany GmbH filed Critical Sterling Fluid Systems Germany GmbH
Publication of EP0966611A1 publication Critical patent/EP0966611A1/fr
Application granted granted Critical
Publication of EP0966611B1 publication Critical patent/EP0966611B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)

Claims (6)

  1. Pompe à anneau liquide et gaz comportant un arbre (3), une étanchéité d'arbre (4), un palier d'arbre (5) agissant sur l'arbre (3) à l'extérieur de l'étanchéité d'arbre (4) ainsi qu'un interstice (8) entre l'étanchéité d'arbre (4) et le palier d'arbre (5), caractérisée en ce que le palier d'arbre (5) est protégé de l'interstice (8) réalisé fermé par une autre étanchéité (9) satisfaisant à des exigences d'étanchéité moindres que l'étanchéité d'arbre (4), et l'interstice (8) est d'une part relié à une chambre sous vide de la pompe, en un emplacement qui, pendant le fonctionnement correct, se situe plus bas que sa liaison, rendue étanche par l'autre étanchéité (9), avec le palier d'arbre (5), et est pourvu d'autre part d'un raccord d'amenée de gaz (11).
  2. Pompe selon la revendication 1, caractérisée en ce que le raccord d'amenée de gaz (11) est relié au côté refoulement de la pompe réalisée comme pompe à gaz.
  3. Pompe selon la revendication 1, caractérisée en ce que le raccord d'amenée de gaz (11) est ouvert vers l'atmosphère.
  4. Pompe selon l'une des revendications 1 à 3, caractérisée en ce que dans la conduite de liaison entre l'interstice (8) et la chambre sous vide de la pompe et/ou le côté refoulement de la pompe est disposé un clapet de non-retour.
  5. Pompe selon l'une des revendications 1 à 4, caractérisée en ce que la conduite de liaison avec la chambre sous vide de la pompe est au moins en partie transparente.
  6. Pompe à anneau liquide installée présentant les caractéristiques de l'une des revendications 1 à 5.
EP98912460A 1997-03-11 1998-03-10 Pompe avec garniture d'etancheite Expired - Lifetime EP0966611B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29704403U DE29704403U1 (de) 1997-03-11 1997-03-11 Pumpe mit Wellenabdichtung
DE29704403U 1997-03-11
PCT/EP1998/001365 WO1998040628A1 (fr) 1997-03-11 1998-03-10 Pompe avec garniture d'etancheite

Publications (2)

Publication Number Publication Date
EP0966611A1 EP0966611A1 (fr) 1999-12-29
EP0966611B1 true EP0966611B1 (fr) 2004-06-16

Family

ID=8037287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98912460A Expired - Lifetime EP0966611B1 (fr) 1997-03-11 1998-03-10 Pompe avec garniture d'etancheite

Country Status (5)

Country Link
EP (1) EP0966611B1 (fr)
AT (1) ATE269493T1 (fr)
DE (2) DE29704403U1 (fr)
ES (1) ES2221161T3 (fr)
WO (1) WO1998040628A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
WO1998040628A1 (fr) 1998-09-17
DE59811580D1 (de) 2004-07-22
EP0966611A1 (fr) 1999-12-29
DE29704403U1 (de) 1998-08-13
ATE269493T1 (de) 2004-07-15
ES2221161T3 (es) 2004-12-16

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