EP1134424B1 - A seal housing - Google Patents

A seal housing Download PDF

Info

Publication number
EP1134424B1
EP1134424B1 EP01104978A EP01104978A EP1134424B1 EP 1134424 B1 EP1134424 B1 EP 1134424B1 EP 01104978 A EP01104978 A EP 01104978A EP 01104978 A EP01104978 A EP 01104978A EP 1134424 B1 EP1134424 B1 EP 1134424B1
Authority
EP
European Patent Office
Prior art keywords
assembly
shaft
insulating part
seal space
fluid
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
EP01104978A
Other languages
German (de)
French (fr)
Other versions
EP1134424A3 (en
EP1134424A2 (en
Inventor
Christopher Hamkins
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 EP1134424A2 publication Critical patent/EP1134424A2/en
Publication of EP1134424A3 publication Critical patent/EP1134424A3/en
Application granted granted Critical
Publication of EP1134424B1 publication Critical patent/EP1134424B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps

Definitions

  • the invention relates to an aggregate for receiving hot fluids, in particular centrifugal pump for conveying hot fluids, wherein a shaft penetrates a sealing space with at least one mechanical seal disposed therein, there is a fluid-conducting connection between the unit and the seal chamber, and the fluid removed from the unit cools and rinses the mechanical seal ,
  • Aggregates for holding hot media require safety measures to protect the mechanical seals used for sealing against overheating.
  • the temperature which forms in the area of the sealing surfaces of a mechanical seal should be as low as possible for safe mechanical seal operation.
  • Additional cooling devices represent an increased cost, which increases the overall cost of an aggregate.
  • cooling devices cause additional running energy costs for an operator. There is therefore an effort to keep by simple design measures, the temperatures within a sealing space within limits.
  • a pump for conveying hot media in which the seal housing is connected to the pump housing via a tubular section of small cross-section. With the aid of a fan wheel mounted on the pump shaft, the seal housing is cooled.
  • a sheet metal disc covers the pressure-side pump cover and closes with this serving as a thermal insulation device space. This is intended to reduce the heat output from the pump cover to the ambient air.
  • a generic unit is through the US Pat. No. 5,624,245 known. Between a pump chamber and a mechanical seal space insulators are arranged, by means of which a heat conduction is reduced. Through an annular flow space along the shaft, there is a fluid exchange between the hot pump room to be cooled to a mechanical seal chamber.
  • the invention is based on the problem of preventing aggregates contained in hot fluids from heating up a sealing space.
  • the solution to this problem is provided by the features of claim 1.
  • the heat transfer which takes place from the hot aggregate, is considerably reduced. Because as a result of the insulating part registered on the surrounding the shaft, tubular portion registered heat can not be transferred directly from the wall of the seal chamber to the liquid therein.
  • the insulating part placed on or inside the wall lengthens the effective length of the thermal barrier. The heat transfer path is thus extended radially outward in the radial direction, which is why the heat flow follows this, only then to get in the outer region of the seal chamber to the liquid therein. This results in two advantages. In the region of the insulating part, the radial wall provides, on the one hand, an internal resistance to the heat transfer and, on the other hand, due to the enlarged wall surface, an additional possibility for heat radiation via the outer surface to the ambient air.
  • a further solution according to the invention provides that in the region of the fluid-carrying connection between the unit and the sealing space on the housing and / or the shaft one or more throttle gaps smallest gap width are arranged, wherein at least one throttle gap bounding wall surface is provided with transverse to the axis of rotation of the shaft grooves ,
  • An embodiment of the invention provides that the insulating part is mounted within the sealing space on the aggregate side wall surface. This solution can be realized with the least cost and in the simplest way.
  • the material-related thermal conductivity ⁇ of the insulating member by at least 30% smaller than the thermal conductivity ⁇ of the sealing chamber connecting the unit housing part.
  • the radially measurable to the shaft outer dimensions of the insulating part are at least twice greater than the outer dimensions of the sealing space in the region of the shaft with the unit connecting housing part.
  • the insulating part may in this case consist of a plastic, of a metallic and / or ceramic material or the insulating part has an evacuated or gas-filled cavity.
  • the shaft 3 is surrounded by a seal housing 4 and penetrates a seal chamber 5 contained therein, within which a mechanical seal 6 is arranged.
  • Between the seal housing 4 and unit 1 extends a two parts together connecting tubular heat barrier 7.
  • the wall surfaces of the housing of the thermal barrier are dimensioned so that there is a low possible heat conduction.
  • an insulating part 9 is arranged on the wall surface 8 of the seal housing 4, which starts from the thermal barrier 7, extending in the radial direction and which limits the seal chamber 5 to the outside. In the example shown it is fastened with screws 10. Instead of the screws 10, other known types of fastening can be used or the insulating part 9 can also be completely or partially integrated in the wall surface 8.
  • two throttle bodies 11, 12 are arranged, which reduce an intensive fluid exchange between the hot unit 1 and the seal chamber 5.
  • the existing along the shaft 3 fluid-conducting connection between the unit 1 and the seal chamber 5 is thus reduced in their exchange performance.
  • the internal thermal conductivity of the material of the insulating member 9, also known as the ⁇ value, is at least 30% smaller than the thermal conductivity of the thermal barrier 7. Furthermore, the outer dimensions of the insulating member 9, diameter, or length / width ratios, correspondingly greater than the outer diameter of the thermal barrier 7 is selected. The dimensions of the insulating part 9 are formed larger by at least twice the wall thickness of the thermal barrier 7.
  • the material for the insulating part 9 can be selected according to the promoted in the unit 1 fluids.
  • selected plastics can be used according to the temperature limits.
  • commercially available materials use, which are inexpensive to obtain.
  • an in Fig. 3 used insulating part 19 find use. It is made as a hollow body, for. B. sheet, in the interior of an evacuated or gas-filled cavity 20 is made. It is also possible to integrate such a cavity 20 in the wall surface 8 of the seal housing 4.
  • Fig. 2 is shown in an enlarged view of the shaft passage in the area of the thermal barrier 7.
  • the grooves 13, 14, which are preferably arranged at the inlet of the fluid-carrying connection of the thermal barrier 7, prevent an axial exchange of hot fluid.
  • An along the shaft 3 in the axial direction successful replacement of a hot fluid from the hot unit 1 in the sealing chamber 5 to be cooled represents an undesirable heat transfer in the axial direction.
  • the small vibrations occurring during rotation of the shaft 3 in normal operation lead to a pinch or Pumping movement of the fluid in the region of the shaft passage of the heat barrier 7. This wave vibrations and the resulting squeezing of the liquid in the narrow gaps of the fluid-carrying connection inevitably leads to the movement of the fluid in the longitudinal direction and Circumferential direction.
  • the grooves 13, 14 arranged in the region of the throttle gaps 11, 12 cause the squeezing caused by the shaft vibrations to only lead to movements of the hot fluid in the circumferential direction.
  • a pumping direction is prevented in the axial direction to the seal chamber 5 out and substantially reduced in the axial direction on the hot fluid axial heat exchange.

Landscapes

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

Description

Die Erfindung betrifft ein Aggregat zur Aufnahme heißer Fluide, insbesondere Kreiselpumpe zur Förderung heißer Fluide, wobei eine Welle einen Dichtungsraum mit mindestens einer darin angeordneten Gleitringdichtung durchdringt, zwischen Aggregat und Dichtungsraum eine fluidführende Verbindung besteht, und das dem Aggregat entnommene Fluid die Gleitringdichtung kühlt und spült.The invention relates to an aggregate for receiving hot fluids, in particular centrifugal pump for conveying hot fluids, wherein a shaft penetrates a sealing space with at least one mechanical seal disposed therein, there is a fluid-conducting connection between the unit and the seal chamber, and the fluid removed from the unit cools and rinses the mechanical seal ,

Aggregate zur Aufnahme heißer Medien, beispielsweise Kreiselpumpen zur Förderung heißer Medien mit Temperaturen bis zu 350 °C oder mehr, erfordern Sicherungsmaßnahmen, um die zur Abdichtung eingesetzten Gleitringdichtungen vor einer Überhitzung zu schützen. Die im Bereich der Dichtungsflächen einer Gleitringdichtung sich ausbildende Temperatur sollte für einen sicheren Gleitringdichtungsbetrieb möglichst niedrig sein. Zusätzliche Kühleinrichtungen stellen einen erhöhten Aufwand dar, der die Gesamtkosten eines Aggregates verteuert. Weiterhin verursachen Kühleinrichtungen für einen Betreiber zusätzliche laufende Energiekosten. Es besteht daher das Bestreben, durch einfache konstruktive Maßnahmen die Temperaturen innerhalb eines Dichtungsraumes in Grenzen zu halten.Aggregates for holding hot media, such as centrifugal pumps for conveying hot media with temperatures up to 350 ° C or more, require safety measures to protect the mechanical seals used for sealing against overheating. The temperature which forms in the area of the sealing surfaces of a mechanical seal should be as low as possible for safe mechanical seal operation. Additional cooling devices represent an increased cost, which increases the overall cost of an aggregate. Furthermore, cooling devices cause additional running energy costs for an operator. There is therefore an effort to keep by simple design measures, the temperatures within a sealing space within limits.

Dazu ist es bekannt, denjenigen Gehäuseabschnitt, durch den eine Welle hindurchgeführt wird und der eine Verbindung zwischen einem heiße Fluide enthaltenden Gehäuse und einem Dichtungsraum herstellt, die Funktion einer Wärmesperre zu übertragen. Dies erfolgt durch dessen dünnwandige Ausbildung und eine entsprechend gewählte Baulänge, um die Wärmeleitung zu verringern und die Wärmeabstrahlung zu vergrößern. Bei Aggregaten in Form von Pumpen, deren Außenabmessungen beispielsweise durch Normabmessungen begrenzt sind, sind damit jedoch der maximalen Länge eines solchen verbindenden Gehäuseabschnittes Grenzen gesetzt. Weiterhin sind der Maßnahme zur Verringerung der Wärmeleitung, wonach die Gehäuseabmessungen von dem als Verbindungsteil zwischen Gehäuse und Dichtungsraum dienenden Gehäuseabschnitt minimiert werden, aus Festigkeitsgründen jedoch Grenzen gesetzt.For this purpose, it is known that those housing section through which a shaft is passed and which produces a connection between a housing containing hot fluids and a sealing space, to transfer the function of a thermal barrier. This is done by its thin-walled design and a correspondingly chosen length, in order to reduce the heat conduction and to increase the heat radiation. For aggregates in the form of pumps whose outer dimensions are limited, for example, by standard dimensions are, however, so that the maximum length of such a connecting housing section limits. Furthermore, the measure to reduce the heat conduction, according to which the housing dimensions are minimized by serving as a connecting part between the housing and the seal chamber housing portion, but limits set for strength reasons.

Durch die WO 96/27740 ist eine Pumpe zur Förderung heißer Medien bekannt, bei der das Dichtungsgehäuse über einen rohrförmigen Abschnitt geringen Querschnittes mit dem Pumpengehäuse verbunden ist. Mit Hilfe eines auf der Pumpenwelle befestigten Lüfterrades wird das Dichtungsgehäuse gekühlt. Zusätzlich deckt eine Blechscheibe den druckseitigen Pumpendeckel ab und schließt mit diesen einen als Wärmedämmeinrichtung dienenden Raum ein. Damit soll die Wärmeabgabe vom Pumpendeckel auf die Umgebungsluft reduziert werden.By the WO 96/27740 For example, a pump for conveying hot media is known in which the seal housing is connected to the pump housing via a tubular section of small cross-section. With the aid of a fan wheel mounted on the pump shaft, the seal housing is cooled. In addition, a sheet metal disc covers the pressure-side pump cover and closes with this serving as a thermal insulation device space. This is intended to reduce the heat output from the pump cover to the ambient air.

Ein gattungsgemäßes Aggregat ist durch die US-A 5 624 245 bekannt. Zwischen einem Pumpenraum und einem Gleitringdichtungsraum sind Isolatoren angeordnet, mit deren Hilfe eine Wärmeleitung reduziert wird. Durch einen ringförmigen Strömungsraum entlang der Welle kommt es zu einem Flüssigkeitsaustausch zwischen dem heißen Pumpenraum einem zu kühlenden Gleitringdichtungsraum.A generic unit is through the US Pat. No. 5,624,245 known. Between a pump chamber and a mechanical seal space insulators are arranged, by means of which a heat conduction is reduced. Through an annular flow space along the shaft, there is a fluid exchange between the hot pump room to be cooled to a mechanical seal chamber.

Ein ähnliches Aggregat ist auch durch DE 2140959 bekannt.A similar aggregate is also through DE 2140959 known.

Der Erfindung liegt das Problem zugrunde, für heiße Fluide enthaltene Aggregate die Aufheizung eines Dichtungsraumes zu verhindern. Die Lösung dieses Problems erfolgt mit den Merkmalen des Anspruches 1.The invention is based on the problem of preventing aggregates contained in hot fluids from heating up a sealing space. The solution to this problem is provided by the features of claim 1.

Durch die Anordnung eines Isolierteiles an oder in der aggregatseitigen Wandfläche des Dichtungsraumes im Bereich der Wellendurchführung wird die Wärmeübertragung, die vom heißen Aggregat aus stattfindet, erheblich reduziert. Denn infolge des Isolierteiles kann die über den die Welle umgebenden, rohrförmigen Abschnitt eingetragene Wärme nicht direkt von der Wand des Dichtungsraumes auf die darin befindliche Flüssigkeit übertragen werden. Das an oder innerhalb der Wand angeordnete Isolierteil verlängert die effektive Länge der Wärmesperre. Der Wärmeübertragungsweg wird damit in radialer Richtung nach radial auswärts verlängert, weshalb der Wärmestrom diesem folgt, um dann erst im äußeren Bereich des Dichtungsraumes an die darin befindliche Flüssigkeit zu gelangen. Dadurch ergeben sich zwei Vorteile. Im Bereich des Isolierteiles bietet die radiale Wand zum einen einen inneren Widerstand gegen die Wärmeübertragung und zum anderen durch die vergrößerte Wandfläche eine zusätzliche Möglichkeit zur Wärmeabstrahlung über die Außenfläche an die Umgebungsluft.By arranging an insulating part on or in the aggregate-side wall surface of the sealing space in the region of the shaft passage, the heat transfer, which takes place from the hot aggregate, is considerably reduced. Because as a result of the insulating part registered on the surrounding the shaft, tubular portion registered heat can not be transferred directly from the wall of the seal chamber to the liquid therein. The insulating part placed on or inside the wall lengthens the effective length of the thermal barrier. The heat transfer path is thus extended radially outward in the radial direction, which is why the heat flow follows this, only then to get in the outer region of the seal chamber to the liquid therein. This results in two advantages. In the region of the insulating part, the radial wall provides, on the one hand, an internal resistance to the heat transfer and, on the other hand, due to the enlarged wall surface, an additional possibility for heat radiation via the outer surface to the ambient air.

Eine weitere erfindungsgemäße Lösung sieht vor, daß im Bereich der fluidführenden Verbindung zwischen Aggregat und Dichtungsraum am Gehäuse und/oder der Welle ein oder mehrere Drosselspalte geringster Spaltweite angeordnet sind, wobei mindestens eine den Drosselspalt begrenzende Wandfläche mit quer zur Drehachse der Welle angeordneten Rillen versehen ist. Mit dieser Lösung wird in entscheidendem Maße ein Wärmetransport über die fluidführende Verbindung entlang der Welle zwischen Aggregat und Dichtungsraum reduziert. Die Ausbildung der den Drosselspalt begrenzenden Wandfläche mit Rillen steigert die Drosselwirkung und damit das Einströmen eines Fluids mit hoher Temperatur. Weiterhin verhindern die Rillen bei einer Erwärmung der Bauteile und damit bei einer Ausdehnung der Bauteile, daß im Bereich des engen Drosselspaltes ein Festfressen stattfinden kann. Sollte es im Bereich der Spitzen der Rillen zu Berührungen zwischen stillstehendem und rotierendem Teil kommen, so schleifen sich die Spitzen im Bereich der Berührungszone schnell ab und gefährden nicht die Funktion des Aggregates.A further solution according to the invention provides that in the region of the fluid-carrying connection between the unit and the sealing space on the housing and / or the shaft one or more throttle gaps smallest gap width are arranged, wherein at least one throttle gap bounding wall surface is provided with transverse to the axis of rotation of the shaft grooves , With this solution, heat transfer via the fluid-conducting connection along the shaft between the unit and the sealing space is decisively reduced. The formation of the throttle gap limiting wall surface with grooves increases the throttle effect and thus the influx of a fluid at high temperature. Furthermore, prevent the grooves in a heating of the components and thus in an expansion of the components that seizure can take place in the region of the narrow throttle gap. Should there be any contact between the stationary and the rotating part in the area of the tips of the grooves, the tips in the area of the contact zone will quickly wipe off and will not jeopardize the function of the unit.

Eine Ausgestaltung der Erfindung sieht vor, daß das Isolierteil innerhalb des Dichtungsraumes an der aggregatseitigen Wandfläche befestigt ist. Diese Lösung läßt sich mit den geringsten Kosten und in einfachster Weise verwirklichen.An embodiment of the invention provides that the insulating part is mounted within the sealing space on the aggregate side wall surface. This solution can be realized with the least cost and in the simplest way.

Versuche haben ergeben, daß sich eine besonders gute Isolierwirkung ergibt, wenn der materialbezogene Wärmeleitfähigkeitswert λ des Isolierteiles um mindestens 30 % kleiner ist als der Wärmeleitfähigkeitswert λ eines den Dichtungsraum mit dem Aggregat verbindenden Gehäuseteiles. Auch hat es sich als vorteilhaft erwiesen, wenn die radial zur Welle meßbaren Außenabmessungen des Isolierteiles mindestens um das doppelte größer sind als die Außenabmessungen des den Dichtungsraum im Bereich der Welle mit dem Aggregat verbindenden Gehäuseteiles. Das Isolierteil kann hierbei aus einem Kunststoff, aus einem metallischen und/oder keramischen Werkstoff bestehen oder das Isolierteil besitzt einen evakuierten oder gasgefüllten Hohlraum.Experiments have shown that a particularly good insulation results when the material-related thermal conductivity λ of the insulating member by at least 30% smaller than the thermal conductivity λ of the sealing chamber connecting the unit housing part. Also, it has proved to be advantageous if the radially measurable to the shaft outer dimensions of the insulating part are at least twice greater than the outer dimensions of the sealing space in the region of the shaft with the unit connecting housing part. The insulating part may in this case consist of a plastic, of a metallic and / or ceramic material or the insulating part has an evacuated or gas-filled cavity.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Es zeigen die

Fig. 1
eine Kreiselpumpe zur Förderung heißer Fluide, die
Fig. 2
in vergrößerter Darstellung eine Wellendurchführung im Bereich einer Wärmesperre und die
Fig. 3
eine andere Ausführungsform eines Isolierteiles.
An embodiment of the invention is illustrated in the drawings and will be described in more detail below. It show the
Fig. 1
a centrifugal pump for conveying hot fluids, the
Fig. 2
in an enlarged view a shaft passage in the area of a thermal barrier and the
Fig. 3
another embodiment of an insulating part.

In der Fig. 1 ist ein heiße Fluide enthaltende Aggregat 1 gezeigt, hier eine Kreiselpumpe, dessen Laufrad 2 von einer Welle 3 angetrieben wird. Die Welle 3 ist von einem Dichtungsgehäuse 4 umgeben und durchdringt einen darin enthaltenen Dichtungsraum 5, innerhalb dessen eine Gleitringdichtung 6 angeordnet ist. Zwischen Dichtungsgehäuse 4 und Aggregat 1 erstreckt sich eine die beiden Teile miteinander verbindende rohrförmige Wärmesperre 7. Die Wandflächen vom Gehäuse der Wärmesperre sind so dimensioniert, daß darüber eine gering mögliche Wärmeleitung erfolgt.In the Fig. 1 is shown a unit containing hot fluids 1, here a centrifugal pump whose impeller 2 is driven by a shaft 3. The shaft 3 is surrounded by a seal housing 4 and penetrates a seal chamber 5 contained therein, within which a mechanical seal 6 is arranged. Between the seal housing 4 and unit 1 extends a two parts together connecting tubular heat barrier 7. The wall surfaces of the housing of the thermal barrier are dimensioned so that there is a low possible heat conduction.

An der Wandfläche 8 des Dichtungsgehäuses 4, welche von der Wärmesperre 7 ausgeht, sich in radialer Richtung erstreckt und die den Dichtungsraum 5 nach außen hin begrenzt, ist ein Isolierteil 9 angeordnet. In dem gezeigten Beispiel ist es mit Schrauben 10 befestigt. Anstelle der Schrauben 10 können auch andere bekannte Befestigungsarten Verwendung finden oder das Isolierteil 9 kann auch in die Wandfläche 8 ganz oder teilweise integriert sein.On the wall surface 8 of the seal housing 4, which starts from the thermal barrier 7, extending in the radial direction and which limits the seal chamber 5 to the outside, an insulating part 9 is arranged. In the example shown it is fastened with screws 10. Instead of the screws 10, other known types of fastening can be used or the insulating part 9 can also be completely or partially integrated in the wall surface 8.

Innerhalb der Wärmesperre 7 sind zwei Drosselstellen 11, 12 angeordnet, die einen intensiven Fluidaustausch zwischen dem heißen Aggregat 1 und dem Dichtungsraum 5 reduzieren. Die entlang der Welle 3 bestehende fluidführende Verbindung zwischen Aggregat 1 und Dichtungsraum 5 wird somit in ihrer Austauschleistung reduziert.Within the thermal barrier 7, two throttle bodies 11, 12 are arranged, which reduce an intensive fluid exchange between the hot unit 1 and the seal chamber 5. The existing along the shaft 3 fluid-conducting connection between the unit 1 and the seal chamber 5 is thus reduced in their exchange performance.

Diejenige Wärme, die vom Aggregat 1 durch die Wandflächen der Wärmesperre 7 zum Dichtungsraum 5 hin fließt, kann im Bereich des Isolierteiles 9 nicht auf die im Dichtungsraum 5 befindliche Flüssigkeit einwirken. Stattdessen bewirkt das Isolierteil 9 einen Wärmefluß von der Wärmesperre 7 in radialer Richtung nach außen in die Wandfläche 8. Da die dem Isolierteil 9 gegenüberliegende Wandfläche 8 zur Außenseite hin eine große wärmeabstrahlende Ringfläche darstellt, wird somit ein Großteil der Wärme nach außen abgestrahlt und gelangt gar nicht erst in den Dichtungsraum 5.The heat which flows from the unit 1 through the wall surfaces of the thermal barrier 7 to the sealing chamber 5, can not act on the liquid in the sealing chamber 5 in the region of the insulating part 9. Instead, the insulating member 9 causes a heat flow from the thermal barrier 7 in the radial direction outwardly into the wall surface 8. Since the insulating part 9 opposite wall surface 8 to the outside is a large heat-radiating annular surface, Thus, a large part of the heat is radiated to the outside and does not even get into the seal chamber. 5

Die innere Wärmeleitfähigkeit vom Material des Isolierteiles 9, auch als der λ-Wert bekannt, ist mindestens 30 % kleiner als die Wärmeleitfähigkeit der Wärmesperre 7. Weiterhin sind die äußeren Abmessungen des Isolierteiles 9, Durchmesser-, oder Längen-/Breitenverhältnisse, entsprechend größer als der Außendurchmesser der Wärmesperre 7 gewählt. Die Abmessungen des Isolierteiles 9 sind mindestens um die doppelte Wandstärke der Wärmesperre 7 größer ausgebildet.The internal thermal conductivity of the material of the insulating member 9, also known as the λ value, is at least 30% smaller than the thermal conductivity of the thermal barrier 7. Furthermore, the outer dimensions of the insulating member 9, diameter, or length / width ratios, correspondingly greater than the outer diameter of the thermal barrier 7 is selected. The dimensions of the insulating part 9 are formed larger by at least twice the wall thickness of the thermal barrier 7.

Das Material für das Isolierteil 9 kann entsprechend den im Aggregat 1 geförderten Fluiden ausgewählt werden. Bei einem Einsatz der Pumpe, beispielsweise zur Förderung von Heißwasser, können entsprechend den Temperaturgrenzen ausgewählte Kunststoffe Verwendung finden. Hierbei finden handelsübliche Materialien Verwendung, die preiswert zu beziehen sind.The material for the insulating part 9 can be selected according to the promoted in the unit 1 fluids. When using the pump, for example, for the promotion of hot water, selected plastics can be used according to the temperature limits. Here are commercially available materials use, which are inexpensive to obtain.

Für Fluide, denen aggressive Eigenschaften zu eigen sind, kann auch ein in Fig. 3 gezeigtes Isolierteil 19 Verwendung finden. Es ist als Hohlkörper gefertigt, z. B. aus Blech, in dessen Innern ein evakuierter oder gasgefüllter Hohlraum 20 besteht. Ebenso ist es möglich, einen solchen Hohlraum 20 in die Wandfläche 8 des Dichtungsgehäuses 4 zu integrieren.For fluids that have aggressive properties, an in Fig. 3 used insulating part 19 find use. It is made as a hollow body, for. B. sheet, in the interior of an evacuated or gas-filled cavity 20 is made. It is also possible to integrate such a cavity 20 in the wall surface 8 of the seal housing 4.

In der Fig. 2 ist in vergrößerter Darstellung die Wellendurchführung im Bereich der Wärmesperre 7 gezeigt. An den Drosselstellen 11, 12 verfügen die den Drosselspalt begrenzenden Gehäusewandflächen über mehrere Rillen 13, 14. Die Rillen 13, 14, die vorzugsweise am Eintritt der fluidführenden Verbindung der Wärmesperre 7 angeordnet sind, verhindern einen axialen Austausch von heißem Fluid. Ein entlang der Welle 3 in axialer Richtung erfolgender Austausch eines heißen Fluids vom heißen Aggregat 1 in den zu kühlenden Dichtungsraum 5 stellt eine unerwünschte Wärmeübertragung in axialer Richtung dar. Die während der Rotation der Welle 3 im Normalbetrieb auftretenden kleinen Schwingungen führen zu einer Quetsch- oder Pumpbewegung des Fluids im Bereich des Wellendurchganges der Wärmesperre 7. Diese Wellenschwingungen und das dadurch verursachte Quetschen der Flüssigkeit in den engen Spalten der fluidführenden Verbindung führt zwangsläufig zur Bewegung des Fluids in Längsrichtung und Umfangsrichtung. Die im Bereich der Drosselspalte 11, 12 angeordneten Rillen 13, 14 bewirken, daß das von den Wellenschwingungen verursachte Quetschen nur zu Bewegungen des heißen Fluids in Umfangsrichtung führt. Damit wird eine Pumprichtung in axialer Richtung zum Dichtungsraum 5 hin verhindert und ein in axialer Richtung über das heiße Fluid bedingter axialer Wärmeaustausch wesentlich vermindert.In the Fig. 2 is shown in an enlarged view of the shaft passage in the area of the thermal barrier 7. The grooves 13, 14, which are preferably arranged at the inlet of the fluid-carrying connection of the thermal barrier 7, prevent an axial exchange of hot fluid. An along the shaft 3 in the axial direction successful replacement of a hot fluid from the hot unit 1 in the sealing chamber 5 to be cooled represents an undesirable heat transfer in the axial direction. The small vibrations occurring during rotation of the shaft 3 in normal operation lead to a pinch or Pumping movement of the fluid in the region of the shaft passage of the heat barrier 7. This wave vibrations and the resulting squeezing of the liquid in the narrow gaps of the fluid-carrying connection inevitably leads to the movement of the fluid in the longitudinal direction and Circumferential direction. The grooves 13, 14 arranged in the region of the throttle gaps 11, 12 cause the squeezing caused by the shaft vibrations to only lead to movements of the hot fluid in the circumferential direction. Thus, a pumping direction is prevented in the axial direction to the seal chamber 5 out and substantially reduced in the axial direction on the hot fluid axial heat exchange.

Claims (7)

  1. Assembly (1) for the reception of hot fluids, in particular centrifugal pump for the conveyance of hot fluids, a shaft (3) penetrating through a seal space (5) having at least one floating ring seal (6) arranged in it, a fluid-carrying connection being present between the assembly (1) and seal space (5), and the fluid extracted from the assembly (1) cooling and scavenging the floating ring seal (6), characterized in that one or more throttle gaps (11, 12) of the smallest possible gap width are arranged at the housing and/or the shaft (3) in the region of the fluid-carrying connection between the assembly (1) and seal space (5), at least one wall surface which delimits a throttle gap (11, 12) being provided with grooves (13, 14) arranged transversely with respect to the axis of rotation of the shaft (3).
  2. Assembly according to Claim 1, characterized in that an insulating part (9) is fastened to the assembly-side wall surface (8) inside the seal space (5).
  3. Assembly according to Claim 2, characterized in that the material-related thermal conductivity value λ of the insulating part (9) is at least 30% lower than the thermal conductivity value λ of a housing part (7) connecting the seal space (5) to the assembly (1).
  4. Assembly according to Claim 2 or 3, characterized in that the external dimensions of the insulating part (9) which are measurable radially with respect to the shaft (3) are at least twice as large as the external dimensions of the housing part (7) connecting the seal space (5) to the assembly (1) in the region of the shaft (3).
  5. Assembly according to one of Claims 2 to 4, the assembly being a centrifugal pump, characterized in that the insulating part (9) consists of a plastic.
  6. Assembly according to one of Claims 2 to 4, the assembly being a centrifugal pump, characterized in that the insulating part (9) consists of a metallic and/or ceramic material.
  7. Centrifugal pump according to Claim 6, characterized in that the insulating part (19) possesses an evacuated or gas-filled cavity (20).
EP01104978A 2000-03-17 2001-03-01 A seal housing Expired - Lifetime EP1134424B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10013152 2000-03-17
DE10013152A DE10013152A1 (en) 2000-03-17 2000-03-17 Seal housing

Publications (3)

Publication Number Publication Date
EP1134424A2 EP1134424A2 (en) 2001-09-19
EP1134424A3 EP1134424A3 (en) 2002-10-09
EP1134424B1 true EP1134424B1 (en) 2008-10-15

Family

ID=7635192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01104978A Expired - Lifetime EP1134424B1 (en) 2000-03-17 2001-03-01 A seal housing

Country Status (3)

Country Link
EP (1) EP1134424B1 (en)
DE (2) DE10013152A1 (en)
DK (1) DK1134424T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021129695A1 (en) 2021-11-15 2023-05-17 KSB SE & Co. KGaA Centrifugal pump with cooling insert
DE102022001479A1 (en) 2022-04-27 2023-11-02 KSB SE & Co. KGaA Centrifugal pump arrangement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50206223D1 (en) 2001-10-22 2006-05-18 Sulzer Pumpen Ag Shaft sealing arrangement for a pump for conveying hot fluids
EP1304485B1 (en) * 2001-10-22 2006-03-29 Sulzer Pumpen Ag Pump seal for a pump pumping hot fluids
GB2511476A (en) * 2012-12-07 2014-09-10 Thomas Andreas Guenther Device and system for hydrocarbon conversion
CN103291626B (en) * 2013-07-05 2016-04-06 辽宁石化职业技术学院 A kind of Pulp pump
CN108930667A (en) * 2017-05-26 2018-12-04 中国电建集团上海能源装备有限公司 A kind of cooling decompression end cap of nuclear power conventional island feed pump

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2140959A1 (en) * 1971-08-16 1973-03-01 Allweiler Ag DEVICE FOR FLUSHING THE SHAFT SEAL ON A CENTRIFUGAL PUMP
FR2288241A1 (en) * 1974-10-14 1976-05-14 Materiel Telephonique Electric pump for hot liquids - has pump cover extension with motor shaft gland and supporting open distance piece carrying motor
DE3735351A1 (en) * 1986-10-17 1988-04-21 Sihi Gmbh & Co Kg Centrifugal pump
DE3834990C1 (en) * 1988-10-14 1990-02-22 Gerhard 6208 Bad Schwalbach De Bodendorfer Seal arrangement for turbo-machines with over-mounted rotor
DE9111161U1 (en) * 1991-09-09 1993-01-14 Sihi Gmbh & Co Kg, 2210 Itzehoe Centrifugal pump
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, 25524 Itzehoe Pump for conveying hot media
US6068455A (en) * 1997-03-20 2000-05-30 B/E Aerospace Long life pump system
DE19721196A1 (en) * 1997-05-21 1998-11-26 Klein Schanzlin & Becker Ag Machine unit with integrated heat barrier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021129695A1 (en) 2021-11-15 2023-05-17 KSB SE & Co. KGaA Centrifugal pump with cooling insert
WO2023083777A1 (en) 2021-11-15 2023-05-19 KSB SE & Co. KGaA Centrifugal pump having a cooling insert
DE102022001479A1 (en) 2022-04-27 2023-11-02 KSB SE & Co. KGaA Centrifugal pump arrangement
WO2023208769A1 (en) 2022-04-27 2023-11-02 KSB SE & Co. KGaA Rotary pump assembly

Also Published As

Publication number Publication date
EP1134424A3 (en) 2002-10-09
DE10013152A1 (en) 2001-09-20
EP1134424A2 (en) 2001-09-19
DK1134424T3 (en) 2009-02-16
DE50114410D1 (en) 2008-11-27

Similar Documents

Publication Publication Date Title
EP0207457B1 (en) Water pump impeller
DE2532262A1 (en) MAGNETIC DRIVEN CENTRIFUGAL PUMP
EP1828615B1 (en) Arrangement of a shaft with a slip-ring seal mounted thereon
EP2286118A1 (en) Mechanical seal arrangement having integrated heat transfer unit
EP2607757B1 (en) Slip ring seal
EP1134424B1 (en) A seal housing
EP2994643B1 (en) Pump arrangement and method for producing a containment shell for the pump arrangement
DE102018104893A1 (en) Cooling jacket training
DE2901474A1 (en) SELF-COOLING MECHANICAL SEAL
EP2438305B1 (en) Seal for rotary pump
EP1286055A1 (en) Wet rotor pump
DE3821352C1 (en)
EP0386315A1 (en) Sealing device and pump provided therewith
DE10247424A1 (en) Adjustable vane wheel for pump has induction channel directly in front of it able to be closed and/or throttled by blocking device
DE10322464B4 (en) Canned motor pump
WO2013189571A1 (en) Motorized centrifugal pump with a rotary seal
DE19835765C2 (en) Viscous fluid type heat generator
EP3741997B1 (en) Pump device with heat exchanger for cooling the drive
EP0134548A2 (en) Fluid friction coupling
DE4330648C2 (en) Radial pump
EP1304485B1 (en) Pump seal for a pump pumping hot fluids
DE19751529C2 (en) Heater using fluid friction heat
DE102018213016B4 (en) pump assembly
EP0797736B1 (en) Pump case
CH633624A5 (en) MECHANICAL SEAL.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RIC1 Information provided on ipc code assigned before grant

Free format text: 7F 04D 29/10 A, 7F 04D 29/58 B, 7F 04D 7/06 B

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20030408

AKX Designation fees paid

Designated state(s): DE DK FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50114410

Country of ref document: DE

Date of ref document: 20081127

Kind code of ref document: P

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20090716

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20170329

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20170329

Year of fee payment: 17

Ref country code: DK

Payment date: 20170329

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20170331

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20170407

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50114410

Country of ref document: DE

Owner name: KSB SE & CO. KGAA, DE

Free format text: FORMER OWNER: KSB AG, 67227 FRANKENTHAL, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50114410

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20180331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20180301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180301

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180331