EP1132624A1 - Pump casing with separate sealing unit - Google Patents

Pump casing with separate sealing unit Download PDF

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Publication number
EP1132624A1
EP1132624A1 EP00105018A EP00105018A EP1132624A1 EP 1132624 A1 EP1132624 A1 EP 1132624A1 EP 00105018 A EP00105018 A EP 00105018A EP 00105018 A EP00105018 A EP 00105018A EP 1132624 A1 EP1132624 A1 EP 1132624A1
Authority
EP
European Patent Office
Prior art keywords
housing
seal
cover
pump
seals
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.)
Granted
Application number
EP00105018A
Other languages
German (de)
French (fr)
Other versions
EP1132624B1 (en
Inventor
Jörg Freese
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
Sterling Fluid Systems GmbH
Original Assignee
Sterling Fluid Systems Germany GmbH
Sterling Fluid Systems 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, Sterling Fluid Systems GmbH filed Critical Sterling Fluid Systems Germany GmbH
Priority to DK00105018T priority Critical patent/DK1132624T3/en
Priority to ES00105018T priority patent/ES2250037T3/en
Priority to DE50011375T priority patent/DE50011375D1/en
Priority to AT00105018T priority patent/ATE307296T1/en
Priority to EP00105018A priority patent/EP1132624B1/en
Publication of EP1132624A1 publication Critical patent/EP1132624A1/en
Application granted granted Critical
Publication of EP1132624B1 publication Critical patent/EP1132624B1/en
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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
    • F04D29/128—Shaft sealings using sealing-rings especially adapted for liquid pumps with special means for adducting cooling or sealing fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • Centrifugal pump housings generally consist of one or several housing parts that make up the work space or work spaces enclose on the circumference, as well as a lid which the pump shaft is guided sealed into the housing. Because there are different types of seals, different ones Requirements for the shape of the housing cover it is common for anyone related to one Pump type to use a special housing cover to provide. This is expensive because different Lids would have to be kept in stock. They are too Lids, which are often shaped in a special way and are therefore cast or forgings are the more expensive, the more different Forms of it exist.
  • the invention has for its object to this effort reduce, and achieves this by the specified in claim 1 Features and preferably by those of the subclaims.
  • the housing cover has an assembly opening and predetermined for each seal from a group Seals related to this lid are to be used, an insertable into the assembly opening and with the cover a sealing housing enclosing a static seal is provided. It is therefore not necessary considering different seal types several Keep lid shapes in stock. In contrast to the housing cover the seal housings are inexpensive to manufacture Parts.
  • the advantage is thus achieved that the effort for both the production as well as the storage of the lid is reduced becomes. Furthermore, the invention allows for a given Pump the seal against another one afterwards Type including seal housing to be replaced without the Pump cover is replaced. This usually takes not even being solved.
  • any of the predetermined seals operate with barrier fluid it can, in particular, if this blocking medium should be removed from the pump, it should be appropriate that the cover and the seal housing with aligned holes be provided for the supply of the barrier medium.
  • the hole in In this case, cover can be present regardless of this whether the seal type that requires the locking medium is used will or not.
  • the cover hole is aligned the corresponding hole in the seal housing; in the other Case, the cover hole is carried out by the closed Seal housing blocked.
  • the supply channel can generally only in the seal housing be provided.
  • the aligned holes in the opposite one another Circumferential surfaces of the mounting opening and the seal housing open out these peripheral surfaces being designed as mating surfaces are.
  • the execution as mating surfaces means that their dimensions each within a narrow tolerance range are approximated so that one may be between them remaining gap is so small that the Locking medium losses occurring are negligible. It it is understood that in this case the peripheral surfaces mentioned are located within the static seal that the Sealing housing seals against the housing cover, see above that any leakage remains in the pump and not get out.
  • the housing of the pump comprises a main housing part 1, the foot 2, the suction port 3 and the pressure port 4 forms, and on the other hand a housing cover 5, which the Main housing part 1 on the drive side closes.
  • a bearing housing 6 the two Bearing 7 for the shaft 8, which through the cover 5 in the housing is guided and carries the impeller 9 there.
  • the housing cover 5 For the passage of the shaft 8 contains the housing cover 5 one Passage opening 10, which is closed by the seal housing 11 which in turn holds the seal 12.
  • the Seal housing 11 is in the area of the end faces 13 screwed the housing cover 15 and by a suitable static seal sealed.
  • the seal 12 is as Mechanical seal 12a formed.
  • FIG. 2 is a Stuffing box 12b in a chamber of the seal housing 11 is axially compressed by means of glasses 14.
  • she is intended for operation with sealing liquid, which is caused by a bore 15 taken from the pump chamber near the pressure side is and via a bore 16 in the seal housing 11, which with the bore 15 is aligned, enters the packing area.
  • the Transition from hole 15 to hole 16 takes place in the area of the gap 17 between opposing peripheral surfaces the seal housing 11 and the housing cover 5 instead, which is so narrow by choosing suitable dimensional tolerances, that the loss of barrier liquid that occurs as a result is negligible.
  • the seal is also one with Bulk liquid operated packing seal 12c.
  • the difference 2 is the barrier liquid supplied from the outside, via a bore 18 in the seal housing 11.
  • the hole in the housing cover 15 15, in the embodiment according to FIG. 2 for the supply of Bulking liquid from inside the pump is in it Trapped by clicking on the closed scope of the Seal housing 11 opens.
  • housing covers are designed to match 5 used. Only the seals and seal housing are trained differently.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The pump has an installation opening(10) for a seal housing(11) in the cover for the pump casing, and for each seal(12a) from a group of predetermined seals a seal housing is fitted in the installation opening and with the cover provides static sealing. At least one of the predetermined seals is supplied with sealing medium and the cover and seal housing have aligning holes for feed thereof. The opposite lying circumferential faces of the installation opening and seal housing are constructed as seat engaging surfaces.

Description

Die Gehäuse von Kreiselpumpen bestehen in der Regel aus einem oder mehreren Gehäuseteilen, die den Arbeitsraum oder die Arbeitsräume am Umfang umschließen, sowie einem Deckel, durch den die Pumpenwelle abgedichtet in das Gehäuse geführt ist. Da es unterschiedliche Typen von Dichtungen gibt, die unterschiedliche Anforderungen an die Gestalt des Gehäusedeckels stellen, ist es üblich, für jede im Zusammenhang mit einer Pumpentype zur verwendende Dichtungstype einen besonderen Gehäusedeckel vorzusehen. Dies ist aufwendig, weil unterschiedliche Deckel vorrätig gehalten werden müßten. Auch sind die Deckel, die oft in besonderer Weise geformt und deshalb Guß- oder Schmiedeteile sind, um so kostspieliger, je unterschiedlichere Formen es davon gibt.Centrifugal pump housings generally consist of one or several housing parts that make up the work space or work spaces enclose on the circumference, as well as a lid which the pump shaft is guided sealed into the housing. Because there are different types of seals, different ones Requirements for the shape of the housing cover it is common for anyone related to one Pump type to use a special housing cover to provide. This is expensive because different Lids would have to be kept in stock. They are too Lids, which are often shaped in a special way and are therefore cast or forgings are the more expensive, the more different Forms of it exist.

Der Erfindung liegt die Aufgabe zugrunde, diesen Aufwand zu verringern, und erreicht dies durch die in Anspruch 1 angegebenen Merkmale sowie vorzugsweise durch diejenigen der Unteransprüche.The invention has for its object to this effort reduce, and achieves this by the specified in claim 1 Features and preferably by those of the subclaims.

Demgemäß ist vorgesehen, daß der Gehäusedeckel eine Montageöffnung aufweist und für jede Dichtung aus einer Gruppe vorbestimmter Dichtungen, die im Zusammenhang mit diesem Deckel zu verwenden sind, ein in die Montageöffnung einsetzbares und mit dem Deckel eine statische Dichtung einschließendes Dichtungsgehäuse vorgesehen ist. Es ist daher nicht erforderlich, mit Rücksicht auf unterschiedliche Dichtungstypen mehrere Deckelformen vorrätig zu halten. Im Gegensatz zu dem Gehäusedeckel sind die Dichtungsgehäuse unaufwendig herstellbare Teile.Accordingly, it is provided that the housing cover has an assembly opening and predetermined for each seal from a group Seals related to this lid are to be used, an insertable into the assembly opening and with the cover a sealing housing enclosing a static seal is provided. It is therefore not necessary considering different seal types several Keep lid shapes in stock. In contrast to the housing cover the seal housings are inexpensive to manufacture Parts.

Erreicht wird somit der Vorteil, daß der Aufwand sowohl für die Herstellung als auch die Lagerhaltung der Deckel verringert wird. Ferner ermöglichst es die Erfindung, bei einer gegebenen Pumpe nachträglich die Dichtung gegen einen anderen Typ samt Dichtungsgehäuse auszuwechseln, ohne daß auch der Pumpendeckel ausgewechselt wird. Dieser braucht in der Regel nicht einmal gelöst zu werden.The advantage is thus achieved that the effort for both the production as well as the storage of the lid is reduced becomes. Furthermore, the invention allows for a given Pump the seal against another one afterwards Type including seal housing to be replaced without the Pump cover is replaced. This usually takes not even being solved.

Wenn eine der vorbestimmten Dichtungen mit Sperrmedium zu betreiben ist, kann es insbesondere dann, wenn dieses Sperrmedium der Pumpe entnommen werden soll, zweckmäßig sein, daß der Deckel und das Dichtungsgehäuse mit fluchtenden Bohrungen zur Zufuhr des Sperrmediums versehen werden. Die Bohrung im Deckel kann in diesem Fall ohne Rücksicht darauf vorhanden sein, ob die sperrmediumsbedürftige Dichtungstype verwendet wird oder nicht. Im einen Fall fluchtet die Deckelbohrung mit der entsprechenden Bohrung des Dichtungsgehäuses; im anderen Fall wird die Deckelbohrung durch das geschlossen ausgeführte Dichtungsgehäuse versperrt.If any of the predetermined seals operate with barrier fluid it can, in particular, if this blocking medium should be removed from the pump, it should be appropriate that the cover and the seal housing with aligned holes be provided for the supply of the barrier medium. The hole in In this case, cover can be present regardless of this whether the seal type that requires the locking medium is used will or not. In one case, the cover hole is aligned the corresponding hole in the seal housing; in the other Case, the cover hole is carried out by the closed Seal housing blocked.

Wenn das Sperrmedium von außen zugeführt wird, kann der Zuführungskanal im allgemeinen ausschließlich im Dichtungsgehäuse vorgesehen werden.If the barrier medium is supplied from the outside, the supply channel can generally only in the seal housing be provided.

Um zu vermeiden, daß die Übergangsstelle von der Deckelbohrung zur Bohrung des Dichtungsgehäuses mit einer Dichtung versehen werden muß, ist es nach der Erfindung zweckmäßig, wenn die fluchtenden Bohrungen in den einander gegenüberliegenden Umfangsflächen der Montageöffnung und des Dichtungsgehäuses münden, wobei diese Umfangsflächen als Paßflächen ausgebildet sind. Die Ausführung als Paßflächen bedeutet, daß ihre Abmessungen jeweils in einem engen Toleranzbereich einander angenähert sind, so daß ein zwischen ihnen möglicherweise verbleibender Spalt so gering ist, daß die dadurch stattfindenden Sperrmediumsverluste vernachlässigbar sind. Es versteht sich, daß in diesem Fall die genannten Umfangsflächen innerhalb der statischen Dichtung gelegen sind, die das Dichtungsgehäuse gegenüber dem Gehäusedeckel abdichtet, so daß etwaige Leckverluste in der Pumpe verbleiben und nicht nach außen gelangen.To avoid the transition point from the cover hole for drilling the seal housing with a seal must be provided, it is expedient according to the invention if the aligned holes in the opposite one another Circumferential surfaces of the mounting opening and the seal housing open out, these peripheral surfaces being designed as mating surfaces are. The execution as mating surfaces means that their dimensions each within a narrow tolerance range are approximated so that one may be between them remaining gap is so small that the Locking medium losses occurring are negligible. It it is understood that in this case the peripheral surfaces mentioned are located within the static seal that the Sealing housing seals against the housing cover, see above that any leakage remains in the pump and not get out.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die vorteilhafte Ausführungsbeispiele veranschaulicht. Es zeigen:

Fig. 1
einen Längsschnitt durch eine Pumpe und
Fig. 2 und 3
Teilschnitte derselben Pumpe mit unterschiedlichen Wellendichtungen.
The invention is explained in more detail below with reference to the drawing, which illustrates advantageous exemplary embodiments. Show it:
Fig. 1
a longitudinal section through a pump and
2 and 3
Partial sections of the same pump with different shaft seals.

Das Gehäuse der Pumpe umfaßt einerseits einen Hauptgehäuseteil 1, der den Fuß 2, den Saugstutzen 3 und den Druckstutzen 4 bildet, und andererseits einen Gehäusedeckel 5, der den Hauptgehäuseteil 1 auf der Antriebsseite schließt. An das Pumpengehäuse schließt sich ein Lagergehäuse 6 an, das zwei Lager 7 für die Welle 8 enthält, die durch den Deckel 5 in das Gehäuse geführt ist und dort das Flügelrad 9 trägt. Für den Durchtritt der Welle 8 enthält der Gehäusedeckel 5 eine Durchtrittsöffnung 10, die durch das Dichtungsgehäuse 11 geschlossen ist, das seinerseits die Dichtung 12 hält. Das Dichtungsgehäuse 11 ist im Bereich der Stirnflächen 13 mit dem Gehäusedeckel 15 verschraubt und durch eine geeignete statische Dichtung abgedichtet.On the one hand, the housing of the pump comprises a main housing part 1, the foot 2, the suction port 3 and the pressure port 4 forms, and on the other hand a housing cover 5, which the Main housing part 1 on the drive side closes. To the Pump housing is followed by a bearing housing 6, the two Bearing 7 for the shaft 8, which through the cover 5 in the housing is guided and carries the impeller 9 there. For the passage of the shaft 8 contains the housing cover 5 one Passage opening 10, which is closed by the seal housing 11 which in turn holds the seal 12. The Seal housing 11 is in the area of the end faces 13 screwed the housing cover 15 and by a suitable static seal sealed.

Im Ausführungsbeispiel gemäß Fig. 1 ist die Dichtung 12 als Gleitringdichtung 12a ausgebildet.1, the seal 12 is as Mechanical seal 12a formed.

Im Ausführungsbeispiel gemäß Fig. 2 handelt es sich um eine Stopfbuchspackung 12b, die in einer Kammer des Dichtungsgehäuses 11 mittels einer Brille 14 axial komprimiert wird. Sie ist zum Betrieb mit Sperrflüssigkeit vorgesehen, die durch eine Bohrung 15 dem Pumpenraum nahe der Druckseite entnommen wird und über eine Bohrung 16 im Dichtungsgehäuse 11, die mit der Bohrung 15 fluchtet, in den Packungsbereich gelangt. Der Übergang von der Bohrung 15 zur Bohrung 16 findet im Bereich des Spalts 17 zwischen einander gegenüberstehenden Umfangsflächen des Dichtungsgehäuses 11 und des Gehäusedeckels 5 statt, der durch Wahl geeigneter Maßtoleranzen so eng ist, daß der dadurch stattfindende Verlust an Sperrflüssigkeit vernachlässigbar ist.2 is a Stuffing box 12b in a chamber of the seal housing 11 is axially compressed by means of glasses 14. she is intended for operation with sealing liquid, which is caused by a bore 15 taken from the pump chamber near the pressure side is and via a bore 16 in the seal housing 11, which with the bore 15 is aligned, enters the packing area. The Transition from hole 15 to hole 16 takes place in the area of the gap 17 between opposing peripheral surfaces the seal housing 11 and the housing cover 5 instead, which is so narrow by choosing suitable dimensional tolerances, that the loss of barrier liquid that occurs as a result is negligible.

Im Beispiel gemäß Fig. 3 ist die Dichtung ebenfalls eine mit Sperrflüssigkeit betriebene Packungsdichtung 12c. Im Unterschied zur Ausführung gemäß Fig. 2 wird die Sperrflüssigkeit von außen zugeführt, und zwar über eine Bohrung 18 im Dichtungsgehäuse 11. Die im Gehäusedeckel 15 befindliche Bohrung 15, die in der Ausführung gemäß Fig. 2 für die Zuführung von Sperrflüssigkeit von innerhalb der Pumpe dient, ist in diesem Falle abgesperrt, indem sie auf den geschlossenen Umfang des Dichtungsgehäuses 11 mündet.In the example according to FIG. 3, the seal is also one with Bulk liquid operated packing seal 12c. The difference 2 is the barrier liquid supplied from the outside, via a bore 18 in the seal housing 11. The hole in the housing cover 15 15, in the embodiment according to FIG. 2 for the supply of Bulking liquid from inside the pump is in it Trapped by clicking on the closed scope of the Seal housing 11 opens.

In alle drei Fällen werden übereinstimmend ausgebildete Gehäusedeckel 5 verwendet. Lediglich die Dichtungen und Dichtungsgehäuse sind unterschiedlich ausgebildet.In all three cases, housing covers are designed to match 5 used. Only the seals and seal housing are trained differently.

Claims (3)

Pumpe mit einer Pumpenwelle (8) und einem Pumpengehäuse (1, 5), das einen Gehäusedeckel (5) umfaßt, der eine Durchtrittsöffnung 10 für die Pumpenwelle und im Bereich der Durchtrittsöffnung (10) eine Dichtung (12) enthält, dadurch gekennzeichnet, daß die Durchtrittsöffnung (10) als Montageöffnung für ein Dichtungsgehäuse (11) ausgebildet ist und für jede Dichtung (12a, 12b, 12c) aus einer Gruppe vorbestimmter Dichtungen (12a, 12b, 12c) ein in die Montageöffnung (10) einsetzbares und mit dem Dekkel eine statische Dichtung einschließendes Dichtungsgehäuse (11) vorgesehen ist.Pump with a pump shaft (8) and a pump housing (1, 5) which comprises a housing cover (5) which contains a passage opening 10 for the pump shaft and a seal (12) in the region of the passage opening (10), characterized in that the passage opening (10) is designed as an assembly opening for a seal housing (11) and for each seal (12a, 12b, 12c) from a group of predetermined seals (12a, 12b, 12c) an insertable into the assembly opening (10) and with the cover a sealing housing (11) including a static seal is provided. Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens eine der vorbestimmten Dichtungen (12a, 12b, 12c) mit Sperrmedium zu betreiben ist und der Deckel (5) sowie das Dichtungsgehäuse (11) fluchtende Bohrungen (15, 16) für die Sperrmediumszufuhr enthalten.Pump according to claim 1, characterized in that at least one of the predetermined seals (12a, 12b, 12c) is to be operated with barrier medium and the cover (5) and the seal housing (11) contain aligned bores (15, 16) for the barrier medium supply. Pumpe nach Anspruch 2, dadurch gekennzeichnet, daß die einander gegenüberliegenden Umfangsflächen der Montageöffnung (10) und des darin liegenden Dichtungsgehäuses (11) als Paßflächen ausgeführt und innerhalb der statischen Dichtung gelegen sind und das die fluchtenden Bohrungen (15, 16) ohne weitere Abdichtung in den Umfangsflächen mündet.Pump according to claim 2, characterized in that the mutually opposite peripheral surfaces of the mounting opening (10) and the sealing housing (11) therein are designed as mating surfaces and are located within the static seal and that the aligned bores (15, 16) without further sealing in the peripheral surfaces opens.
EP00105018A 2000-03-09 2000-03-09 Pump casing with separate sealing unit Expired - Lifetime EP1132624B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK00105018T DK1132624T3 (en) 2000-03-09 2000-03-09 Pump housing with separate sealing unit
ES00105018T ES2250037T3 (en) 2000-03-09 2000-03-09 PUMP HOUSING WITH INDEPENDENT CLOSURE UNIT.
DE50011375T DE50011375D1 (en) 2000-03-09 2000-03-09 Pump housing with separate sealing unit
AT00105018T ATE307296T1 (en) 2000-03-09 2000-03-09 PUMP HOUSING WITH SEPARATE SEAL UNIT
EP00105018A EP1132624B1 (en) 2000-03-09 2000-03-09 Pump casing with separate sealing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00105018A EP1132624B1 (en) 2000-03-09 2000-03-09 Pump casing with separate sealing unit

Publications (2)

Publication Number Publication Date
EP1132624A1 true EP1132624A1 (en) 2001-09-12
EP1132624B1 EP1132624B1 (en) 2005-10-19

Family

ID=8168069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00105018A Expired - Lifetime EP1132624B1 (en) 2000-03-09 2000-03-09 Pump casing with separate sealing unit

Country Status (5)

Country Link
EP (1) EP1132624B1 (en)
AT (1) ATE307296T1 (en)
DE (1) DE50011375D1 (en)
DK (1) DK1132624T3 (en)
ES (1) ES2250037T3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588869A (en) * 1981-07-10 1983-01-19 Hitachi Ltd Water sealing device in feed water pump for boiler
EP0477153A1 (en) * 1990-09-03 1992-03-25 ITT Flygt Aktiebolag Seal device
GB2329432A (en) * 1997-04-18 1999-03-24 Thomas Wilson Ramsay Seal for pump shaft with adjustable barrier fluid pressure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS588869A (en) * 1981-07-10 1983-01-19 Hitachi Ltd Water sealing device in feed water pump for boiler
EP0477153A1 (en) * 1990-09-03 1992-03-25 ITT Flygt Aktiebolag Seal device
GB2329432A (en) * 1997-04-18 1999-03-24 Thomas Wilson Ramsay Seal for pump shaft with adjustable barrier fluid pressure

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 081 (M - 205) 5 April 1983 (1983-04-05) *
RUETSCHI K: "TEILEVIELFALT ALS KOSTENVERURSACHER AM BEISPIEL VON STANDARDKREISELPUMPEN FUER SERIENFERTIGUNG", INDUSTRIEPUMPEN + KOMPRESSOREN,DE,VULKAN VERLAG, ESSEN, vol. 4, no. 2, 1 June 1998 (1998-06-01), pages 84 - 86,88-93, XP000766435, ISSN: 0947-0654 *

Also Published As

Publication number Publication date
DE50011375D1 (en) 2006-03-02
ATE307296T1 (en) 2005-11-15
DK1132624T3 (en) 2006-02-06
ES2250037T3 (en) 2006-04-16
EP1132624B1 (en) 2005-10-19

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