EP2438305A1 - Sealing system for centrifugal pumps - Google Patents

Sealing system for centrifugal pumps

Info

Publication number
EP2438305A1
EP2438305A1 EP10722626A EP10722626A EP2438305A1 EP 2438305 A1 EP2438305 A1 EP 2438305A1 EP 10722626 A EP10722626 A EP 10722626A EP 10722626 A EP10722626 A EP 10722626A EP 2438305 A1 EP2438305 A1 EP 2438305A1
Authority
EP
European Patent Office
Prior art keywords
housing
seal
seal housing
projection
housing cover
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
EP10722626A
Other languages
German (de)
French (fr)
Other versions
EP2438305B1 (en
Inventor
Bernhard Brecht
Uwe Bruhns
Frank Sehr
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.)
KSB AG
Original Assignee
KSB AG
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 KSB AG filed Critical KSB AG
Publication of EP2438305A1 publication Critical patent/EP2438305A1/en
Application granted granted Critical
Publication of EP2438305B1 publication Critical patent/EP2438305B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings 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
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
    • F04D27/0215—Arrangements therefor, e.g. bleed or by-pass valves
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0416—Axial thrust balancing balancing pistons
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals

Definitions

  • the invention relates to a centrifugal pump for conveying hot fluids, with a contacting shaft seal, a seal housing for the shaft seal and a return line for a partial flow of the conveying fluid.
  • Such a centrifugal pump is described in DE 42 30 715 A1, which is used as a feed pump for conveying hot fluids.
  • a discharge fluid exiting from the discharge device forms a partial flow of the delivery fluid.
  • This partial flow also known as discharge water, is used to cool a mechanical seal. For this purpose, it flows through the sealing space completely, thereby dissipating the frictional heat generated during operation of the mechanical seal.
  • the discharge water is then removed from the seal space via a return line connecting the seal housing to a pump stage.
  • This type of shaft seal cooling can only be used up to a certain operating temperature of the delivery fluid.
  • a centrifugal pump with a sealing system for higher operating temperatures is described in DE 195 18 564 A1.
  • a further sealing element is arranged, which bears against the rotating part of the pump.
  • This sealing element consists of a high polymer plastic.
  • the sealing element shields the sealing space from the hot conveying fluid in the pump interior and at the same time ensures a pressure equalization with respect to the sealing space.
  • the discharge water is returned through a return line to the suction side of the centrifugal pump.
  • the seal housing is integrated into a cooling circuit, the cooling fluid was initially removed from the fluid flow. By a connected to the seal housing separate cooling circuit, the heat is removed from the cooling fluid.
  • conventional external cooling systems can be used.
  • the object of the present invention is to provide a multistage centrifugal pump in which the shaft sealing system is designed for a temperature range of the conveying fluid exceeding 160 ° C. and that it can be used for the entire temperature range of feed pumps. Furthermore, it is an object of the invention to dispense with the supply of external cooling fluids in the seal chamber and to provide a cost-effective, reliable sealing system.
  • This object is achieved in that no delivery fluid is discharged from the seal housing, that between the seal housing and the pump housing, a separate housing cover is disposed, wherein between the seal housing and the housing cover a heat transfer minimizing contact surface and that the return line to the housing cover and / or is connected to the pump housing.
  • the rotating component may be either the shaft of the pump or a shaft sleeve pushed over the pump shaft.
  • the axial gap extends parallel to the shaft and passes around the shaft. Geometrically, this gap is a hollow cylinder.
  • the gap throttles the influx of the pump delivery fluid into the seal chamber. The narrower and the longer the gap, the less discharge water can enter the seal housing.
  • the invention is used in multi-stage centrifugal pumps, in which the centrifugal pump has a relief device for the axial thrust, the contacting shaft seal of the relief device is arranged downstream, being discharged through the return line discharge water.
  • the return line for the discharge water is an additional source of heat when conveying hot fluids, which can exert a negative influence on the shaft seal.
  • the connection for a return line for the discharge water has been arranged away from the seal housing.
  • the heat from the return line can not be delivered directly to the seal housing.
  • the new seal housing encloses the touching seal.
  • the seal is a mechanical seal.
  • the division into a housing cover and a new seal housing a thermal decoupling of the seal chamber is achieved with respect to the hot pump housing. On the one hand, this happens because the heat conduction between the housing cover and the seal housing is minimized. On the other hand, a delivery fluid arising as discharge water is already removed from the pump housing away from the seal housing.
  • the seal housing on a projection.
  • this projects in the form of a shoulder encompassing the shaft on the inside of the seal housing.
  • the paragraph serves as a centering for the seal housing with respect to the housing closing the pump housing. Due to the surface of the projection, the heat conduction-related contact surfaces are reduced to a strength necessary measure. The aim is to make this contact surface as small as possible in order to minimize the heat conduction from the housing cover into the seal housing.
  • the housing cover also has a projection.
  • the projection of the housing cover protrudes into the seal housing.
  • the projection of the housing cover is also formed as a hollow cylinder surrounding the shaft. The seal housing is pushed onto the outer circumferential surface of the housing cover projection until the projection of the seal housing meets the housing cover.
  • the projection of the seal housing and the projection of the housing cover are force-transmitting to each other and can overlap each other.
  • the heat conduction between the parts is additionally reduced if a heat-insulating sealing element is positioned between the contact surface of the projection and the housing cover.
  • the projection can also be an individual part in the form of a thermally insulating, centering and can be arranged between the seal housing and housing cover connecting element. This results in a greater combination ability of such a seal housing with different types of pumps. Likewise, as part of a pump revision, older pumps can be retrofitted and thus upgraded for another field of application.
  • the seal housing is composed of an inner and an outer part.
  • the inner part that surrounds the contacting seal is made of a different material than the outer part. It proves to be advantageous if the inner part is designed as a sleeve which is thermally conductively and force-transmittingly connected to the outer part, for example, it may be shrunk. It is also conceivable that the outer part is provided on its inside with a protective coating, plating or the like. In this case, the coating or plating forms the inner part of the seal housing.
  • the outer part of the seal housing has a better
  • Form seal housing as a bronze body. But also others, good thermally conductive and resistant to the prevailing strength requirements materials are used.
  • the inner part of the seal housing is preferably made of a material which is particularly resistant to corrosion by the fluid being conveyed.
  • Stainless steel sleeve formed This can be in the outer part, for example a
  • the bronze body ensures that the heat from the seal chamber is sufficiently dissipated to the environment of the pump.
  • the projection of the seal housing is formed by the inner part of the seal housing. Only the projection has a direct contact with the housing cover. Since the inner part of the seal housing is made of a material with a poor thermal conductivity, for example stainless steel, in this embodiment, the heat flow, which is transferred from the hot housing cover to the cool-seal housing, reduced in size. As a result, a better thermal decoupling of the seal housing is achieved by the housing cover.
  • the housing cover is made of a material having a poor thermal conductivity. It has proved to be particularly advantageous to manufacture the housing cover made of an alloyed, chemically resistant, steel. It proves to be advantageous while a steel with the steel group number 45. But also other chemically resistant and poorly heat-conductive materials are used.
  • the seal housing has ribs with axial channels formed therebetween.
  • the channels are preferably arranged in the outer part of the seal housing and open to the seal housing.
  • the channels can be milled into the seal housing become.
  • a cheaper way to manufacture is to make the outer part of the housing as a casting, with ribs or recesses for the channels.
  • the ribs can be attached to the seal housing individually, in groups or in the form of a ribbed body to transmit heat. This can be accomplished with shrink joints, connectors and other known techniques.
  • the channels are preferably flowed through by air. It has proved to be favorable to position on a rotating part, in particular a coupling of the pump, a fan wheel, which promotes an air flow through the channels. So that the air also flows through the inner areas of the channels, it proves to be appropriate, the
  • the baffles can be attached to the seal housing. They surround the seal housing jacket-shaped and ensure that the air flow flows through the cross sections of the individual channels evenly.
  • Fig. 1 shows a half-section of the pressure-side end of the centrifugal pump
  • Fig. 2 is a 3-D drawing of the seal housing with housing cover.
  • a section of a multi-stage centrifugal pump is shown.
  • the centrifugal pump comprises a pressure housing 1 and a stage housing 2.
  • the wheels 3 are mounted on a shaft 4 and in their entirety form the rotor.
  • the bearing of this rotor via radial bearings 5 and thrust bearing 6.
  • An axial thrust of the rotor is collected by a discharge device 7.
  • a discharge device 7 In principle, there are two different variants, such as a discharge water flowing from it can be removed according to the invention.
  • a return line 8 runs for the discharge water in the pressure housing 1.
  • the return line 8 runs in the housing cover 9 closing the pressure housing 1.
  • the housing cover 9 seals against the pressure housing 1.
  • an axial gap 11 is formed between the housing cover 9 and a shaft protection sleeve 10.
  • the axial gap 11 acts as a throttle for the pump fluid in the pump housing and prevents larger amounts of fluid flow into the space 12 of the seal housing 13 flow.
  • a mechanical seal 14 is disposed within the seal housing 13. Mechanical seals belong to the category of contact seals.
  • the mechanical seal 14 consists of two low-wear rings.
  • the sliding ring 15 rotates with the shaft 4 or with the shaft protection sleeve 10, while the counter-ring 16 bears firmly against the seal housing 13.
  • the seal housing 13 consists of the inner part 18, which surrounds the mechanical seal 14 and an outer part 19.
  • the outer part 19 is a bronze body.
  • the inner part 18 is designed as a stainless steel sleeve which has shrunk into the outer part 19. The stainless steel sleeve 18 is needed to ensure corrosion resistance, while the bronze body 19 is primarily for heat dissipation.
  • a fan wheel 21 On a coupling 20 which connects the pump to a drive, a fan wheel 21 is mounted, which blows air over the seal housing 13. The air flows through passages located between ribs of the outer part and dissipates the heat from the seal housing 13. For better air flow, the outer part 19 of the seal housing 13 is surrounded by a baffle 22.
  • the axial channels 23 in the outer part 19 of the seal housing 13 can be seen.
  • the channels 23 are to the outer surface of the seal housing 13 open.
  • the fan 21 blows air through the channels 23.
  • the guide plate 22 ensures the forced flow of air through the inner regions of the channels 23.
  • the seal housing 13 has a projection 24 which is formed by the inner part 18 of the seal housing 13.
  • Projection 24 serves as a contact surface of the seal housing 13 on the housing cover.
  • Projection 24 is pushed onto a smaller diameter projection 26 of the housing cover 9.
  • the cohesion of the seal housing 13 and pressure cover 9 serve connecting means 28th
  • the projection 26 of the housing cover 9 protrudes into the seal housing 13.

Abstract

The invention relates to a centrifugal pump for delivering hot fluids, having a contacting shaft seal, a seal housing (13) for the shaft seal (14), and a return line (8) for a partial flow of the delivered fluid. No delivered fluid is discharged out of the seal housing, and a separate housing cover (9) is disposed between the seal housing (13) and the pump housing. A contact surface (25) minimizing the heat transfer between the seal housing (13) and the housing cover (9), and the return line (8) is connected to the housing cover (9) and/or to the pump housing (1).

Description

Beschreibung description
Dichtungssystem für KreiselpumpenSealing system for centrifugal pumps
Die Erfindung betrifft eine Kreiselpumpe zur Förderung heißer Fluide, mit einer berührenden Wellenabdichtung, einem Dichtungsgehäuse für die Wellenabdichtung und einer Rückführleitung für einen Teilstrom des Förderfluids.The invention relates to a centrifugal pump for conveying hot fluids, with a contacting shaft seal, a seal housing for the shaft seal and a return line for a partial flow of the conveying fluid.
Eine solche Kreiselpumpe ist in der DE 42 30 715 A1 beschrieben, die als Speisepumpe zur Förderung heißer Fluide eingesetzt wird. Ein aus deren Entlastungseinrichtung austretendes Förderfluid bildet einen Teilstrom des Förderfluids. Dieser Teilstrom, auch unter der Bezeichnung Entlastungswasser bekannt, wird für die Kühlung einer Gleitringdichtung eingesetzt. Dazu durchströmt er deren Dichtungsraum vollständig und führt dabei die Reibungswärme, die beim Betrieb der Gleitringdichtung entsteht, ab. Das Entlastungswasser wird danach aus dem Dichtungsraum über eine Rückführleitung, die das Dichtungsgehäuse mit einer Pumpenstufe verbindet, abgeführt. Diese Art einer Wellendichturigskühlung kann nur bis zu einer bestimmten Betriebstemperatur des Förderfluids eingesetzt werden.Such a centrifugal pump is described in DE 42 30 715 A1, which is used as a feed pump for conveying hot fluids. A discharge fluid exiting from the discharge device forms a partial flow of the delivery fluid. This partial flow, also known as discharge water, is used to cool a mechanical seal. For this purpose, it flows through the sealing space completely, thereby dissipating the frictional heat generated during operation of the mechanical seal. The discharge water is then removed from the seal space via a return line connecting the seal housing to a pump stage. This type of shaft seal cooling can only be used up to a certain operating temperature of the delivery fluid.
Eine Kreiselpumpe mit einem Dichtungssystem für höhere Betriebstemperaturen wird in der DE 195 18 564 A1 beschrieben. Zwischen einem eine Gleitringdichtung aufnehmenden Dichtungsraum und dem Pumpeninnenraum ist ein weiteres Dichtungselement angeordnet, das am rotierenden Teil der Pumpe anliegt. Dieses Dichtungselement besteht aus einem hochpolymeren Kunststoff. Zur Reduzierung eines Wärmeeintrages wird bei dieser Bauart das Entlastungswasser nicht durch den Dichtungsraum geführt. Dazu schirmt das Dichtungselement den Dichtungsraum gegenüber dem heißen Förderfluid im Pumpeninnenraum ab und gewährleistet gleichzeitig einen Druckausgleich gegenüber dem Dichtungsraum. Das Entlastungswasser wird durch eine Rückführleitung zur Saugseite der Kreiselpumpe zurückgeführt. Das Dichtungsgehäuse ist in einen Kühlkreislauf integriert, dessen Kühlfluid anfänglich dem Förderfluid entnommen wurde. Durch einen an das Dichtungsgehäuse angeschlossenen separaten Kühlkreislauf wird dem Kühlfluid die Wärme entzogen. Hierzu können übliche externe Kühlsysteme Verwendung finden.A centrifugal pump with a sealing system for higher operating temperatures is described in DE 195 18 564 A1. Between a mechanical seal receiving a sealing space and the pump interior, a further sealing element is arranged, which bears against the rotating part of the pump. This sealing element consists of a high polymer plastic. To reduce a heat input in this type of relief water is not through the Sealing room led. For this purpose, the sealing element shields the sealing space from the hot conveying fluid in the pump interior and at the same time ensures a pressure equalization with respect to the sealing space. The discharge water is returned through a return line to the suction side of the centrifugal pump. The seal housing is integrated into a cooling circuit, the cooling fluid was initially removed from the fluid flow. By a connected to the seal housing separate cooling circuit, the heat is removed from the cooling fluid. For this purpose, conventional external cooling systems can be used.
Aufgabe der vorliegenden Erfindung ist es, eine mehrstufige Kreiselpumpe zur Verfügung zu stellen, bei der das Wellen-Dichtungssystem für einen über 160 0C hinausgehenden Temperaturbereich des Förderfluid ausgelegt ist und dass es für den gesamten Temperaturbereich von Speisepumpen eingesetzt werden kann. Weiterhin ist es ein Ziel der Erfindung, auf die Zuführung von externen Kühlfluiden in den Dichtungsraum zu verzichten und ein kostengünstiges, zuverlässiges Dichtungssystem zu schaffen.The object of the present invention is to provide a multistage centrifugal pump in which the shaft sealing system is designed for a temperature range of the conveying fluid exceeding 160 ° C. and that it can be used for the entire temperature range of feed pumps. Furthermore, it is an object of the invention to dispense with the supply of external cooling fluids in the seal chamber and to provide a cost-effective, reliable sealing system.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass aus dem Dichtungsgehäuse kein Förderfluid abgeführt wird, dass zwischen Dichtungsgehäuse und dem Pumpengehäuse ein separater Gehäusedeckel angeordnet ist, wobei zwischen dem Dichtungsgehäuse und dem Gehäusedeckel eine den Wärmeübergang minimierende Anlagefläche besteht und dass die Rückführleitung am Gehäusedeckel und/oder am Pumpengehäuse angeschlossen ist.This object is achieved in that no delivery fluid is discharged from the seal housing, that between the seal housing and the pump housing, a separate housing cover is disposed, wherein between the seal housing and the housing cover a heat transfer minimizing contact surface and that the return line to the housing cover and / or is connected to the pump housing.
Zwischen dem Gehäusedeckel und einem rotierenden Bauteil existiert ein Axialspalt. Bei dem rotierenden Bauteil kann es sich entweder um die Welle der Pumpe oder um eine Wellenschutzhülse handeln, die über die Pumpenwelle geschoben ist. Der Axialspalt erstreckt sich parallel zur Welle und läuft um die Welle herum. Geometrisch gesehen handelt es sich bei diesem Spalt um einen Hohlzylinder. Der Spalt drosselt den Zustrom des Pumpenförderfluids in den Dichtungsraum. Je enger und je länger der Spalt ist, desto weniger Entlastungswasser kann in das Dichtungsgehäuse eintreten. Vorzugsweise wird die Erfindung bei mehrstufigen Kreiselpumpen eingesetzt, bei denen die Kreiselpumpe eine Entlastungseinrichtung für den Axialschub aufweist, die berührende Wellenabdichtung der Entlastungseinrichtung nachgeordnet ist, wobei durch die Rückführleitung Entlastungswasser abgeführt wird. Die Rückführleitung für das Entlastungswasser stellt bei der Förderung heißer Fluide eine zusätzliche Wärmequelle dar, die einen negativen Einfluss auf die Wellenabdichtung ausüben kann. Erfindungsgemäß wurde der Anschluss für eine Rückführleitung für das Entlastungswasser entfernt vom Dichtungsgehäuse angeordnet. Somit kann im Gegensatz zu Vorrichtungen nach dem Stand der Technik die Wärme von der Rückführleitung nicht direkt an das Dichtungsgehäuse abgegeben werden.Between the housing cover and a rotating component exists an axial gap. The rotating component may be either the shaft of the pump or a shaft sleeve pushed over the pump shaft. The axial gap extends parallel to the shaft and passes around the shaft. Geometrically, this gap is a hollow cylinder. The gap throttles the influx of the pump delivery fluid into the seal chamber. The narrower and the longer the gap, the less discharge water can enter the seal housing. Preferably, the invention is used in multi-stage centrifugal pumps, in which the centrifugal pump has a relief device for the axial thrust, the contacting shaft seal of the relief device is arranged downstream, being discharged through the return line discharge water. The return line for the discharge water is an additional source of heat when conveying hot fluids, which can exert a negative influence on the shaft seal. According to the invention, the connection for a return line for the discharge water has been arranged away from the seal housing. Thus, unlike prior art devices, the heat from the return line can not be delivered directly to the seal housing.
Das neue Dichtungsgehäuse umschließt die berührende Abdichtung. Vorzugsweise handelt es sich bei der Abdichtung um eine Gleitringdichtung. Durch die Aufteilung in einen Gehäusedeckel und ein neues Dichtungsgehäuse wird eine thermische Abkopplung des Dichtungsraums gegenüber dem heißen Pumpengehäuse erreicht. Zum einen geschieht dies dadurch, dass die Wärmeleitung zwischen Gehäusedeckel und Dichtungsgehäuse minimiert wird. Zum anderen indem ein als Entlastungswasser anfallendes Förderfluid bereits entfernt vom Dichtungsgehäuses aus dem Pumpengehäuse abgeführt wird.The new seal housing encloses the touching seal. Preferably, the seal is a mechanical seal. The division into a housing cover and a new seal housing a thermal decoupling of the seal chamber is achieved with respect to the hot pump housing. On the one hand, this happens because the heat conduction between the housing cover and the seal housing is minimized. On the other hand, a delivery fluid arising as discharge water is already removed from the pump housing away from the seal housing.
In einer besonders vorteilhaften Ausführung der Erfindung weist das Dichtungsgehäuse einen Vorsprung auf. Vorzugsweise springt dieser in Form eines die Welle umgreifenden Absatzes an der Innenseite des Dichtungsgehäuses vor. Der Absatz dient als Zentrierung für das Dichtungsgehäuse gegenüber dem das Pumpengehäuse verschließenden Gehäusedeckel. Durch die Fläche des Vorsprunges werden die eine Wärmeleitung bedingenden Anlageflächen auf ein festigkeitsmäßiges notwendige Maß reduziert. Ziel ist es, diese Anlagefläche möglichst klein zu gestalten, um die Wärmeleitung vom Gehäusedeckel in das Dichtungsgehäuse zu minimieren.In a particularly advantageous embodiment of the invention, the seal housing on a projection. Preferably, this projects in the form of a shoulder encompassing the shaft on the inside of the seal housing. The paragraph serves as a centering for the seal housing with respect to the housing closing the pump housing. Due to the surface of the projection, the heat conduction-related contact surfaces are reduced to a strength necessary measure. The aim is to make this contact surface as small as possible in order to minimize the heat conduction from the housing cover into the seal housing.
Bei einer anderen besonders vorteilhaften Ausführungsform der Erfindung weist auch der Gehäusedeckel einen Vorsprung auf. Dabei ragt der Vorsprung des Gehäusedeckels in das Dichtungsgehäuse hinein. Der Vorsprung des Gehäusedeckels ist ebenfalls als Hohlzylinder ausgebildet, der die Welle umgibt. Das Dichtungsgehäuse wird auf die Außenmantelfläche des Gehäusedeckel-Vorsprungs aufgeschoben bis der Vorsprung des Dichtungsgehäuses auf den Gehäusedeckel trifft. Der Vorsprung des Dichtungsgehäuses und der Vorsprung des Gehäusedeckels liegen kräfteübertragend aneinander und können einander auch überlappen.In another particularly advantageous embodiment of the invention, the housing cover also has a projection. In this case, the projection of the housing cover protrudes into the seal housing. The projection of the housing cover is also formed as a hollow cylinder surrounding the shaft. The seal housing is pushed onto the outer circumferential surface of the housing cover projection until the projection of the seal housing meets the housing cover. The projection of the seal housing and the projection of the housing cover are force-transmitting to each other and can overlap each other.
Die Wärmeleitung zwischen den Teilen wird zusätzlich reduziert, wenn zwischen der Anlagefläche des Vorsprungs und dem Gehäusedeckel ein wärmeisolierendes Dichtungselement positioniert ist.The heat conduction between the parts is additionally reduced if a heat-insulating sealing element is positioned between the contact surface of the projection and the housing cover.
Der Vorsprung kann auch ein Einzelteil in Form eines thermisch isolierenden, zentrierenden und zwischen Dichtungsgehäuse und Gehäusedeckel anordbares Verbindungselements ausgebildet sein. Damit ergibt sich eine größere Kombinationsfähigkeit eines solchen Dichtungsgehäuses mit unterschiedlichen Pumpentypen. Ebenso können dadurch im Rahmen einer Pumpenrevision ältere Pumpen nachgerüstet und damit für einen anderen Einsatzbereich ertüchtigt werden.The projection can also be an individual part in the form of a thermally insulating, centering and can be arranged between the seal housing and housing cover connecting element. This results in a greater combination ability of such a seal housing with different types of pumps. Likewise, as part of a pump revision, older pumps can be retrofitted and thus upgraded for another field of application.
In einer besonders günstigen Ausführungsform der Erfindung setzt sich das Dichtungsgehäuse aus einem inneren und einem äußeren Teil zusammen. Der innere Teil, der die berührende Abdichtung umgibt, besteht aus einem anderen Werkstoff als der äußere Teil. Als vorteilhaft erweist es sich, wenn der innere Teil als Hülse ausgebildet ist, die mit dem äußeren Teil wärmeleitend und kräfteübertragend verbunden ist, beispielsweise kann sie eingeschrumpft sein. Denkbar ist auch, dass das äußere Teil auf seiner Innenseite mit einer schützenden Beschichtung, Plattierung oder ähnlichen versehen ist. In diesem Fall bildet die Beschichtung oder Plattierung den inneren Teil des Dichtungsgehäuses.In a particularly favorable embodiment of the invention, the seal housing is composed of an inner and an outer part. The inner part that surrounds the contacting seal is made of a different material than the outer part. It proves to be advantageous if the inner part is designed as a sleeve which is thermally conductively and force-transmittingly connected to the outer part, for example, it may be shrunk. It is also conceivable that the outer part is provided on its inside with a protective coating, plating or the like. In this case, the coating or plating forms the inner part of the seal housing.
Vorzugsweise weist der äußere Teil des Dichtungsgehäuses eine besserePreferably, the outer part of the seal housing has a better
Wärmeleitfähigkeit auf als der innere Teil. Dadurch kann die Wärme schnell nach außen abgeführt werden. Als günstig hat es sich dabei erwiesen, den äußeren Teil desThermal conductivity on as the inner part. This allows the heat to be dissipated quickly to the outside. As low, it has proven to be the outer part of the
Dichtungsgehäuses als Bronzekörper auszubilden. Aber auch andere, gut wärmeleitende und gegenüber den vorherrschenden Festigkeitsanforderungen beständige Materialien sind dazu verwendbar.Form seal housing as a bronze body. But also others, good thermally conductive and resistant to the prevailing strength requirements materials are used.
Der innere Teil des Dichtungsgehäuses besteht vorzugsweise aus einem Material, das besonders korrosionsbeständig gegenüber dem Förderfluid ist. In einer vorteilhaftenThe inner part of the seal housing is preferably made of a material which is particularly resistant to corrosion by the fluid being conveyed. In an advantageous
Ausführungsform der Erfindung wird der innere Teil des Dichtungsgehäuses von einerEmbodiment of the invention, the inner part of the seal housing of a
Edelstahlhülse gebildet. Diese kann in den äußeren Teil, beispielsweise einenStainless steel sleeve formed. This can be in the outer part, for example a
Bronzekörper, eingeschrumpft werden. Die Edelstahlhülse gewährleistet dieBronze body, shrunk. The stainless steel sleeve ensures the
Korrosionsbeständigkeit. Der Bronzekörper sorgt dafür, dass die Wärme aus dem Dichtungsraum in ausreichendem Maße an die Umgebung der Pumpe abgeführt wird.Corrosion resistance. The bronze body ensures that the heat from the seal chamber is sufficiently dissipated to the environment of the pump.
In einer besonders vorteilhaften Ausführungsform der Erfindung wird der Vorsprung des Dichtungsgehäuses durch den inneren Teil des Dichtungsgehäuses gebildet. Nur der Vorsprung hat einen direkten Kontakt zum Gehäusedeckel. Da der innere Teil des Dichtungsgehäuses aus einem Material mit einer schlechten Wärmeleitfähigkeit, beispielsweise Edelstahl, besteht, wird bei dieser Ausführungsform der Wärmestrom, welcher vom heißen Gehäusedeckel auf das kühl zu haltende Dichtungsgehäuse übertragen wird, verkleinert. Dadurch wird eine bessere thermische Entkopplung des Dichtungsgehäuses vom Gehäusedeckel erreicht.In a particularly advantageous embodiment of the invention, the projection of the seal housing is formed by the inner part of the seal housing. Only the projection has a direct contact with the housing cover. Since the inner part of the seal housing is made of a material with a poor thermal conductivity, for example stainless steel, in this embodiment, the heat flow, which is transferred from the hot housing cover to the cool-seal housing, reduced in size. As a result, a better thermal decoupling of the seal housing is achieved by the housing cover.
Um möglichst wenig Wärme in das Dichtungsgehäuse einzutragen, wird auch der Gehäusedeckel aus einem Material mit einer schlechten Wärmeleitfähigkeit gefertigt. Dabei hat es sich als besonders günstig erwiesen, den Gehäusedeckel aus einem legierten, chemisch beständigen, Stahl zu fertigen. Als vorteilhaft erweist sich dabei ein Stahl mit der Stahlgruppennummer 45. Aber auch andere chemisch beständige und schlecht wärmeleitende Materialien sind dazu verwendbar.In order to enter as little heat in the seal housing, the housing cover is made of a material having a poor thermal conductivity. It has proved to be particularly advantageous to manufacture the housing cover made of an alloyed, chemically resistant, steel. It proves to be advantageous while a steel with the steel group number 45. But also other chemically resistant and poorly heat-conductive materials are used.
Um die Wärme möglichst schnell vom Dichtungsgehäuse abzuführen, weist bei einer besonders vorteilhaften Ausführungsform der Erfindung das Dichtungsgehäuse Rippen mit dazwischen ausgebildeten axialen Kanälen auf. Die Kanäle sind dabei vorzugsweise im äußeren Teil des Dichtungsgehäuses angeordnet und zum Dichtungsgehäuse hin offen. Die Kanäle können in das Dichtungsgehäuse gefräst werden. Eine preiswertere Herstellungsart besteht darin, den äußeren Teil des Gehäuses als ein Gussteil, mit Rippen oder Aussparungen für die Kanäle, zu fertigen. Grundsätzlich ist es auch möglich die Kanäle dadurch zu bilden, dass man Rippen am Dichtungsgehäuse befestigt. Die Rippen können dazu am Dichtungsgehäuse einzeln, gruppenweise oder in Form eines verrippten Körpers wärmeübertragend befestigt sein. Dies kann mit Schrumpfverbindungen, Steckverbindungen und anderen bekannten Techniken verwirklicht werden.In order to dissipate the heat as quickly as possible from the seal housing, in a particularly advantageous embodiment of the invention, the seal housing has ribs with axial channels formed therebetween. The channels are preferably arranged in the outer part of the seal housing and open to the seal housing. The channels can be milled into the seal housing become. A cheaper way to manufacture is to make the outer part of the housing as a casting, with ribs or recesses for the channels. In principle, it is also possible to form the channels by attaching ribs to the seal housing. The ribs can be attached to the seal housing individually, in groups or in the form of a ribbed body to transmit heat. This can be accomplished with shrink joints, connectors and other known techniques.
Um die Wärme aus dem Dichtungsgehäuse möglichst schnell abzuführen, werden die Kanäle vorzugsweise von Luft durchströmt. Dabei hat es sich als günstig erwiesen, auf einem rotierenden Teil, insbesondere einer Kupplung der Pumpe, ein Lüfterrad zu positionieren, das einen Luftstrom durch die Kanäle fördert. Damit die Luft auch durch die inneren Bereiche der Kanäle strömt erweist es sich als zweckmäßig, dasTo remove the heat from the seal housing as quickly as possible, the channels are preferably flowed through by air. It has proved to be favorable to position on a rotating part, in particular a coupling of the pump, a fan wheel, which promotes an air flow through the channels. So that the air also flows through the inner areas of the channels, it proves to be appropriate, the
Dichtungsgehäuse außen mit Leitblechen zu umgeben. Die Leitbleche können dabei am Dichtungsgehäuse befestigt sein. Sie umgeben das Dichtungsgehäuse mantelförmig und sorgen dafür, dass die Luftströmung gleichmäßig die Querschnitte der einzelnen Kanäle durchströmt.Seal housing to surround outside with baffles. The baffles can be attached to the seal housing. They surround the seal housing jacket-shaped and ensure that the air flow flows through the cross sections of the individual channels evenly.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der Beschreibung eines Ausführungsbeispiels anhand von zwei Zeichnungen und aus den Zeichnungen selbst. Dabei zeigtFurther features and advantages of the invention will become apparent from the description of an embodiment with reference to two drawings and from the drawings themselves. It shows
Fig. 1 einen Halbschnitt des druckseitigen Endes der Kreiselpumpe undFig. 1 shows a half-section of the pressure-side end of the centrifugal pump and
Fig. 2 eine 3-D Zeichnung des Dichtungsgehäuses mit Gehäusedeckel.Fig. 2 is a 3-D drawing of the seal housing with housing cover.
In Fig. 1 ist ein Ausschnitt einer mehrstufigen Kreiselpumpe dargestellt. Die Kreiselpumpe umfasst ein Druckgehäuse 1 und ein Stufengehäuse 2. Die Laufräder 3 sind auf einer Welle 4 montiert und bilden in ihrer Gesamtheit den Rotor. Die Lagerung dieses Rotors erfolgt über Radiallager 5 und Axiallager 6. Ein Axialschub des Rotors wird von einer Entlastungseinrichtung 7 aufgefangen. Prinzipiell gibt es zwei unterschiedliche Varianten wie ein daraus abfließendes Entlastungswasser erfindungsgemäß abgeführt werden kann. Bei der ersten Variante verläuft eine Rückführleitung 8 für das Entlastungswasser im Druckgehäuse 1. Bei der zweiten Variante verläuft die Rückführleitung 8 im das Druckgehäuse 1 verschließenden Gehäusedeckel 9. Der Gehäusedeckel 9 schließt dichtend an das Druckgehäuse 1 an.In Fig. 1, a section of a multi-stage centrifugal pump is shown. The centrifugal pump comprises a pressure housing 1 and a stage housing 2. The wheels 3 are mounted on a shaft 4 and in their entirety form the rotor. The bearing of this rotor via radial bearings 5 and thrust bearing 6. An axial thrust of the rotor is collected by a discharge device 7. In principle, there are two different variants, such as a discharge water flowing from it can be removed according to the invention. In the first variant, a return line 8 runs for the discharge water in the pressure housing 1. In the second variant, the return line 8 runs in the housing cover 9 closing the pressure housing 1. The housing cover 9 seals against the pressure housing 1.
Zwischen dem Gehäusedeckel 9 und einer Wellenschutzhülse 10 ist ein Axialspalt 11 ausgebildet. Der Axialspalt 11 wirkt als Drossel für das im Pumpengehäuse befindliche Förderfluid und verhindert, dass größere Mengen an Förderfluid in den Raum 12 des Dichtungsgehäuses 13 fließen.Between the housing cover 9 and a shaft protection sleeve 10, an axial gap 11 is formed. The axial gap 11 acts as a throttle for the pump fluid in the pump housing and prevents larger amounts of fluid flow into the space 12 of the seal housing 13 flow.
Eine Gleitringdichtung 14 ist innerhalb des Dichtungsgehäuses 13 angeordnet. Gleitringdichtungen zählen zur Kategorie der berührenden Abdichtungen. Die Gleitringdichtung 14 besteht aus zwei verschleißarmen Ringen. Der Gleitring 15 läuft mit der Welle 4 beziehungsweise mit der Wellenschutzhülse 10 um, während der Gegenring 16 am Dichtungsgehäuse 13 fest anliegt. Durch eine Feder 17 werden Gleitring 15 und Gegenring 16 aneinander gedrückt.A mechanical seal 14 is disposed within the seal housing 13. Mechanical seals belong to the category of contact seals. The mechanical seal 14 consists of two low-wear rings. The sliding ring 15 rotates with the shaft 4 or with the shaft protection sleeve 10, while the counter-ring 16 bears firmly against the seal housing 13. By a spring 17 slide ring 15 and mating ring 16 are pressed together.
Das Dichtungsgehäuse 13 besteht aus dem inneren Teil 18, der die Gleitringdichtung 14 umgibt und einem äußeren Teil 19. Bei dem äußeren Teil 19 handelt es sich um einen Bronzekörper. Der innere Teil 18 ist als Edelstahlhülse ausgeführt, die in den äußeren Teil 19 eingeschrumpft ist. Die Edelstahlhülse 18 wird benötigt, um die Korrosionsbeständigkeit zu gewährleisten, während der Bronzekörper 19 primär der Wärmeabfuhr dient.The seal housing 13 consists of the inner part 18, which surrounds the mechanical seal 14 and an outer part 19. The outer part 19 is a bronze body. The inner part 18 is designed as a stainless steel sleeve which has shrunk into the outer part 19. The stainless steel sleeve 18 is needed to ensure corrosion resistance, while the bronze body 19 is primarily for heat dissipation.
Auf einer die Pumpe mit einem Antrieb verbindenden Kupplung 20 ist ein Lüfterrad 21 montiert, das Luft über das Dichtungsgehäuse 13 bläst. Die Luft strömt durch Kanäle, die zwischen Rippen des äußeren Teiles befindlich sind und führt die Wärme vom Dichtungsgehäuse 13 ab. Zur besseren Luftführung ist der äußere Teil 19 des Dichtungsgehäuses 13 von einem Leitblech 22 umgeben.On a coupling 20 which connects the pump to a drive, a fan wheel 21 is mounted, which blows air over the seal housing 13. The air flows through passages located between ribs of the outer part and dissipates the heat from the seal housing 13. For better air flow, the outer part 19 of the seal housing 13 is surrounded by a baffle 22.
Aus der perspektivischen Ansicht der Fig. 2 sind die axialen Kanäle 23 im äußeren Teil 19 des Dichtungsgehäuses 13 erkennbar. Die Kanäle 23 sind zur äußeren Mantelfläche des Dichtungsgehäuses 13 hin offen. Das Lüfterrad 21 bläst Luft durch die Kanäle 23. Ein hier aus Übersichtlichkeitsgründen nicht dargestelltes Leitblech 27, vgl. Fig. 1 , ist etwas kürzer ausgebildet als die Länder der Kanäle 23. Es liegt an einem Absatz 27 an und verbessert die Luftführung in den Kanälen 23. Zwischen den Leitblechenden am Absatz 27 und dem Gehäusedeckel 9 sind die Kanäle offen ausgebildet und dienen als Austrittsöffnung für den kühlenden Luftstrom. Das Leitblech 22 sorgt für die Zwangsströmung der Luft durch die inneren Bereiche der Kanäle 23.From the perspective view of Fig. 2, the axial channels 23 in the outer part 19 of the seal housing 13 can be seen. The channels 23 are to the outer surface of the seal housing 13 open. The fan 21 blows air through the channels 23. A not shown here for clarity, baffle 27, see. It is located on a shoulder 27 and improves the air flow in the channels 23. Between the baffle ends on the shoulder 27 and the housing cover 9, the channels are open and serve as an outlet opening for the cooling airflow. The guide plate 22 ensures the forced flow of air through the inner regions of the channels 23.
Das Dichtungsgehäuse 13 weist einen Vorsprung 24 auf, der vom inneren Teil 18 des Dichtungsgehäuses 13 gebildet wird. Die vertikal umlaufende Fläche 25 desThe seal housing 13 has a projection 24 which is formed by the inner part 18 of the seal housing 13. The vertical circumferential surface 25 of the
Vorsprungs 24 dient als Anlagefläche des Dichtungsgehäuses 13 am Gehäusedeckel 9.Projection 24 serves as a contact surface of the seal housing 13 on the housing cover. 9
Zur Zentrierung des Dichtungsgehäuse 13 gegenüber dem Pumpengehäuse, der WelleFor centering the seal housing 13 relative to the pump housing, the shaft
4 und dem Druckdeckel 9 ist in diesem Beispiel der innere Teil 18 mit seinem4 and the pressure cover 9 is in this example, the inner part 18 with his
Vorsprung 24 auf einem im Durchmesser kleineren Vorsprung 26 des Gehäusedeckels 9 aufgeschoben. Dem Zusammenhalt von Dichtungsgehäuse 13 und Druckdeckel 9 dienen Verbindungsmittel 28.Projection 24 is pushed onto a smaller diameter projection 26 of the housing cover 9. The cohesion of the seal housing 13 and pressure cover 9 serve connecting means 28th
Der Vorsprung 26 des Gehäusedeckels 9 ragt in das Dichtungsgehäuse 13 hinein. The projection 26 of the housing cover 9 protrudes into the seal housing 13.

Claims

Patentansprüche claims
1. Kreiselpumpe zur Förderung heißer Fluide, mit einer im Bereich einer Wellendurchführung angeordneten berührenden Wellenabdichtung (14), einem1. Centrifugal pump for conveying hot fluids, with a arranged in the region of a shaft passage contacting shaft seal (14), a
Dichtungsgehäuse für die Wellenabdichtung und einer Rückführleitung (8) für einen Teilstrom des Förderfluids,Sealing housing for the shaft seal and a return line (8) for a partial flow of the conveying fluid,
dadurch gekennzeichnet,characterized,
dass aus dem Dichtungsgehäuse (13) kein Förderfluid abgeführt wird, dass zwischen Dichtungsgehäuse (13) und dem Pumpengehäuse ein separater Gehäusedeckel (9) angeordnet ist, wobei zwischen dem Dichtungsgehäuse (13) und dem Gehäusedeckel (9) eine den Wärmeübergang minimierende Anlagefläche (25) besteht und dass die Rückführleitung (8) am Gehäusedeckelin that no delivery fluid is removed from the seal housing (13), that a separate housing cover (9) is arranged between the seal housing (13) and the pump housing, wherein between the seal housing (13) and the housing cover (9) a contact surface minimizing the heat transfer (25 ) and that the return line (8) on the housing cover
(9) und/oder am Pumpengehäuse (1) angeschlossen ist.(9) and / or on the pump housing (1) is connected.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass ein Spalt (11) zwischen dem feststehenden Gehäusedeckel (9) und einem rotierenden Bauteil (10) den Zustrom von Förderfluid in das Dichtungsgehäuse (13) drosselt.2. Apparatus according to claim 1, characterized in that a gap (11) between the fixed housing cover (9) and a rotating member (10) throttles the influx of conveying fluid into the seal housing (13).
3. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Kreiselpumpe eine Entlastungseinrichtung (7) für den Axialschub aufweist, die berührende Wellenabdichtung (14) der Entlastungseinrichtung (7) nachgeordnet ist, wobei durch die Rückführleitung (8) Entlastungswasser abgeführt wird. 3. Apparatus according to claim 1, characterized in that the centrifugal pump has a relief device (7) for the axial thrust, the contacting shaft seal (14) of the discharge device (7) is arranged downstream, being discharged through the return line (8) discharge water.
4. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Dichtungsgehäuse (13) einen Vorsprung (24) aufweist, wobei eine Fläche (25) des Vorsprungs (24) die Anlagefläche am Gehäusedeckel (9) bildet.4. The device according to claim 1, characterized in that the seal housing (13) has a projection (24), wherein a surface (25) of the projection (24) forms the contact surface on the housing cover (9).
5. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der Gehäusedeckel5. Apparatus according to claim 1, characterized in that the housing cover
(9) einen Vorsprung (26) aufweist, wobei der Vorsprung (26) in das Dichtungsgehäuse (13) hineinragt.(9) has a projection (26), wherein the projection (26) projects into the seal housing (13).
6. Vorrichtung nach Anspruch 1 , 4 oder 5, dadurch gekennzeichnet, dass ein isolierendes Dichtungselement zwischen Gehäusedeckel (9) und6. Apparatus according to claim 1, 4 or 5, characterized in that an insulating sealing element between the housing cover (9) and
Dichtungsgehäuse (13), insbesondere am Vorsprung (26), angeordnet ist.Seal housing (13), in particular on the projection (26) is arranged.
7. Vorrichtung nach Anspruch 4, 5 oder 6, dadurch gekennzeichnet, dass der Vorsprung als ein Einzelteil in Form eines thermisch isolierendes, zentrierendes und zwischen Dichtungsgehäuse und Gehäusedeckel anordbares7. Apparatus according to claim 4, 5 or 6, characterized in that the projection as an individual part in the form of a thermally insulating, centering and can be arranged between the seal housing and housing cover
Verbindungselement angeordnet ist.Connecting element is arranged.
8. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass sich das Dichtungsgehäuse (13) aus einem inneren Teil (18) und einem äußeren Teil (19) zusammensetzt, wobei der innere Teil (18) aus einem anderen Werkstoff besteht als der äußere Teil (19).8. The device according to claim 1, characterized in that the seal housing (13) consists of an inner part (18) and an outer part (19), wherein the inner part (18) consists of a different material than the outer part (18). 19).
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass der äußere Teil (19) eine bessere Wärmeleitfähigkeit aufweist als der innere Teil (18).9. Apparatus according to claim 8, characterized in that the outer part (19) has a better thermal conductivity than the inner part (18).
10. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass der innere Teil (18) aus einem korrosionsbeständigerem Material gefertigt ist als der äußere Teil (19).10. The device according to claim 8, characterized in that the inner part (18) is made of a more corrosion-resistant material than the outer part (19).
11.Vorrichtung nach den Ansprüchen 4 und 8, dadurch gekennzeichnet, dass der11.Vorrichtung according to claims 4 and 8, characterized in that the
Vorsprung (24) durch den inneren Teil (18) gebildet wird. Projection (24) is formed by the inner part (18).
12. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der Gehäusedeckel (9) aus einem legierten, chemisch beständigen Stahl gefertigt ist.12. The device according to claim 1, characterized in that the housing cover (9) is made of an alloyed, chemically resistant steel.
13. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Dichtungsgehäuse (13) axiale Kanäle (23) aufweist.13. The device according to claim 1, characterized in that the seal housing (13) has axial channels (23).
14. Vorrichtung nach den Ansprüchen 6 und 13, dadurch gekennzeichnet, dass der äußere Teil (19) des Dichtungsgehäuses (13) axiale Kanäle (23) aufweist.14. Device according to claims 6 and 13, characterized in that the outer part (19) of the seal housing (13) has axial channels (23).
15. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, dass die Kanäle (23) zur äußeren Mantelfläche des Dichtungsgehäuses (13) hin offen sind.15. The apparatus according to claim 13, characterized in that the channels (23) to the outer circumferential surface of the seal housing (13) are open.
16. Vorrichtung nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass auf einem rotierenden Teil, insbesondere einer Kupplung (20), ein Lüfterrad (21) positioniert ist, das Luft über das Dichtungsgehäuse (13) bläst.16. Device according to one of claims 1 to 15, characterized in that on a rotating part, in particular a coupling (20), a fan wheel (21) is positioned, the air blows over the seal housing (13).
17. Vorrichtung nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass das Dichtungsgehäuse (13) von einem Leitblech (22) umgeben ist. 17. Device according to one of claims 1 to 16, characterized in that the seal housing (13) by a baffle (22) is surrounded.
EP10722626.8A 2009-06-04 2010-05-26 Seal for rotary pump Active EP2438305B1 (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2520777C1 (en) * 2012-12-05 2014-06-27 Общество с ограниченной ответственностью "Балтийские магистральные нефтепроводы" (ООО "Балтнефтепровод") Pump rotor alignment with housing at main line pump unit mid-life repair
CN106468287A (en) * 2015-08-20 2017-03-01 宇航航天装备有限公司 A kind of centrifugal pump specialized high-speed swivel joint
US10533570B2 (en) 2015-12-07 2020-01-14 Fluid Handling Llc Opposed impeller wear ring undercut to offset generated axial thrust in multi-stage pump
RU2672238C1 (en) * 2017-12-20 2018-11-12 Общество с ограниченной ответственностью "Газпром трансгаз Ухта" Method of centering unit of magnetic suspension sensor of the centrifugal blower of gas pumping unit
US11218048B2 (en) 2018-12-14 2022-01-04 Nidec Motor Corporation Shaft-mounted slinger for electric motor

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2221225A (en) * 1938-04-16 1940-11-12 Pacific Pump Works Balancing and leakage device for centrifugal pumps
DE903535C (en) * 1944-05-24 1954-02-08 Wesselinger Gusswerk Rheinguss Centrifugal pump, especially for pumping corrosive fluids
US3666375A (en) * 1969-08-26 1972-05-30 Ernest H Priest Pumping a high or low temperature fluid
US3999882A (en) * 1975-03-17 1976-12-28 Dresser Industries, Inc. Flushing and cooling system for shaft seals and pumps
DE2908733A1 (en) * 1979-03-06 1980-09-11 Gardena Kress & Kastner Gmbh Portable pump-motor set - has plastics casing and walling separating suction and pressure chambers
GB2071211A (en) * 1980-02-22 1981-09-16 Millington & Co Engs Ltd Centrifugal pumps
SU1251230A2 (en) * 1981-10-06 1986-08-15 Ярославский Электромашиностроительный Завод Electric machine
JPH0247314Y2 (en) * 1987-06-26 1990-12-12
US4884945A (en) * 1988-07-21 1989-12-05 John Crane, Inc. Dynamic seal arrangement for impeller pump
DE4230715A1 (en) 1992-09-14 1994-03-17 Klein Schanzlin & Becker Ag Relief water return
US5624245A (en) * 1994-10-26 1997-04-29 Mp Pumps, Inc. Centrufugal pump with thermally isolated and dynamically air cooled shaft seal assembly
DE29503806U1 (en) * 1995-03-06 1996-07-04 Sihi Gmbh & Co Kg Pump for conveying hot media
DE19518564A1 (en) * 1995-05-20 1996-11-21 Klein Schanzlin & Becker Ag Centrifugal pump for conveying hot media
US6287074B1 (en) * 1997-03-31 2001-09-11 Nate International Mechanical seal for shafts and axles
US20080121384A1 (en) * 2006-11-29 2008-05-29 Po-Yung Tseng Liquid cooled heat dissipator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010139415A1 *

Also Published As

Publication number Publication date
WO2010139415A1 (en) 2010-12-09
RU2556475C2 (en) 2015-07-10
RU2011151762A (en) 2013-07-20
DE102009023907A1 (en) 2010-12-09
CN102803737A (en) 2012-11-28
ES2567263T3 (en) 2016-04-21
US20120076643A1 (en) 2012-03-29
CN102803737B (en) 2016-03-16
EP2438305B1 (en) 2016-01-13
US8870521B2 (en) 2014-10-28

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