EP0731280B1 - Heat barrier for a centrifugal pump assembly - Google Patents

Heat barrier for a centrifugal pump assembly Download PDF

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Publication number
EP0731280B1
EP0731280B1 EP96102056A EP96102056A EP0731280B1 EP 0731280 B1 EP0731280 B1 EP 0731280B1 EP 96102056 A EP96102056 A EP 96102056A EP 96102056 A EP96102056 A EP 96102056A EP 0731280 B1 EP0731280 B1 EP 0731280B1
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EP
European Patent Office
Prior art keywords
heat barrier
ceramic element
ceramic
pump
shaft
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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
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EP96102056A
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German (de)
French (fr)
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EP0731280A1 (en
Inventor
Hans-Joachim Dr. Franke
Harald Hartmann
Roland Lachmayer
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KSB AG
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KSB AG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/58Cooling; Heating; Diminishing heat transfer
    • F04D29/586Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/5893Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/06Pumps 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 heat barrier for a centrifugal pump unit, as with the features of The preamble of claim 1 is described.
  • the heat barrier designed here as a kit represents a component which is a has a large axial extent and has two flange surfaces, one of which one is arranged on the pump side and the other on the motor side.
  • a pump impeller driving shaft In the area of one a pump impeller driving shaft has a heat barrier pressure-tight connection.
  • the good thermal insulation effect has the disadvantage that it has a large axial extent and thus the vibration behavior of the can adversely affect the entire pump set.
  • the interchangeable, Thermal insulation elements of the thermal barrier are located on considerably smaller diameter than the force-transmitting connecting elements between pump and motor parts. This type of construction can be significant in today's world larger pump capacities also have an unfavorable influence on the Exercise the vibration behavior of the pump set.
  • the invention is based on the problem of developing a heat barrier that without an additional external and internal cooling device, a rigid one Design of a centrifugal pump unit enables.
  • the solution to this task takes place with the features of claim 1.
  • the power flow is in the immediate vicinity of the Fasteners provided.
  • the necessary power transfer System between pump and motor part is interrupted by an in between insulating ceramic element. Because a straight line of force flows between the parts to be joined together, the ceramic element is only with Pressure forces.
  • the space between the ceramic element and the shaft passage the heat barrier is filled with an insulating material, preferably ceramic Basis, but which has no force-transmitting effects. Thus ensures that heat transfer to the components 2, 5 by heat radiation and 8 and the liquid-filled spaces are prevented. With this one A ceramic fiber mat has been used as the insulating material emphasized advantageous.
  • the ceramic element can be formed in one or more parts, one multi-part ceramic element allows greater structural freedom.
  • the ceramic element can then by several section-shaped ring elements are formed with the appropriate shape even with different Sizes can be used. It is also possible, for example, through the String together small, disc-shaped, individual ceramic elements to form multi-part annular ceramic element.
  • the disc-shaped little ones Ceramic elements can have a contour that is simple Production enables and with a string together the formation of a ring shape in a constructionally specified area.
  • Fig. 1 is a section of a motor pump unit, a heat barrier shown. Between a pump part 1 and a motor part 2 is one Thermal barrier 3 arranged.
  • Fastening means 4 which in the exemplary embodiment Tie rods are designed with a fastening nut, serve to hold the Parts.
  • the heat barrier 3 should, for. B. the windings 15 of the motor part 2 before Protect temperature loads that can arise from hot pump part 1.
  • the heat barrier parts 7, 8 serve as mechanical damage metallic flange elements can be formed and one between them isolating area.
  • the heat barrier parts 7, 8 are only in the area the shaft 9 thermally conductive to each other, where they have a pressure-tight thin-walled Form shaft passage 10. The dimensions of the shaft passage 10 are according to the mechanical loads and for minimal heat transfer educated. In the area of the shaft passage 10, the two are one inside the other fitted heat barrier parts 7, 8 by a weld 11 liquid and connected gastight.
  • a ceramic insulating compound 12 fills the room 12.1 between the insulating, force-transmitting ceramic element 5 and the Shaft passage 10 out. This prevents that under the influence of temperature additional stresses arise in the heat barrier 3 and a heat transfer by heat radiation on components 2, 5 and 8 and those filled with liquid Rooms is prevented. This covers in the area of the connecting elements 4 Heat barrier part 7, the ceramic element 5 and thus holds it in position. A Gap 13 between the two heat barrier parts 7, 8 prevents a direct Heat conduction between the parts.
  • the designated half of the image of a section of a Motor pump unit shows a different design of the ceramic element 5.
  • the ceramic element is provided with openings 14 for carrying out the Connection elements 4 serve.
  • the contact surface between the Heat barrier parts 7, 8 and the ceramic element 5 can thus be made larger become.
  • the openings 14 are designed in their dimensions so that none Touches between the ceramic element 5 and the fastening means 4 takes place so that the ceramic element is only loaded with compressive forces. Adjacent surfaces of the ceramic element are covered with corresponding Provide transition radii to avoid impermissible edge pressures.
  • the ceramic element 5 is designed as a circular ring is easy to manufacture.
  • the use of a one-piece ceramic part 5 requires a two-part design of the heat barrier.
  • the ceramic element can also consist of several parts be trained.
  • a segmented structure would, for example Allow use of a one-piece heat barrier design.
  • suitable Choice of shape and size of each segment can be different Sizes of heat barriers the appropriate ceramic element be put together. Due to the very high insulation effect of the Ceramic element 5 can reduce its axial extent to a minimum become. This results in a short overall length, which in turn has a positive effect on the dynamic behavior of a shaft 9 passed through the heat barrier 3 and associated components.
  • One flying on wave 9 stored - not shown here - reached by the short Wave overhang a much better running behavior.
  • 3 is a variant of a multi-part design of a ceramic element 5 shown.
  • the shape of the ceramic elements 5.1 chosen so that their dense and uniform arrangement at the installation site is possible.
  • FIGS. 4-6 different designs of ceramic elements 5.1 - 5.3 can be combined.
  • the designs shown are round and crescent-shaped only examples and other designs such as trapezoidal or find linear use that form the formation of a ring Allow ceramic element 5 in multi-part design. Examples are in Figs. 4-6 shown. It is a simple optimization through which design and size of a Ceramic element 5.1 - 5.3, which diameter ranges to form a multi-part ceramic element 5 to be covered.
  • the subject matter of the invention is not of diameter ranges or annular circular arrangements limited.
  • the shape of the circumference of an annular, one-piece or multi-part ceramic element can of course also from one Deviate from a circular shape and are elliptical, angular, polygonal or differently shaped or be arranged.
  • An annular, multi-part ceramic element 5 can also by Stringing together small ceramic elements 5.1 - 5.3 of different contours be formed. 4 and 5 show the small ceramic elements 5.1 - 5.3 preferably arranged on diameter ranges that are smaller than that Diameter range in which the fastening means 4 are located. By suitable selection and arrangement of small ceramic elements 5.1 - 5.3 can the multi-part ceramic element 5 is also arranged on a larger diameter be. 6, this is for example by arranging sickle-shaped small ceramic elements 5.2 possible on both sides of the fastening means 4. To one Obtaining large areas of ceramic elements can be used as compensating parts acting, biconcave or biconvex ceramic elements 5.3 in a multi-part designed ceramic element 5 are integrated.

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

Abstract

The pump assembly has a rectilinear force flow (6) between the pump part (1) and motor part (2). A force-transferring insulating single or multi-part ceramic element is mounted in the force flow in the heat barrier (3). The ceramic element can be ring shaped. A space (12.1) filled with ceramic insulating material (12) is located between the ceramic element (5) and a shaft (9) connecting the pump and motor parts. Between the space and shaft the heat barrier can be provided with a thin-walled pressure-resistant gas-tight shaft passage (10).

Description

Die Erfindung betrifft eine Wärmesperre für ein Kreiselpumpenaggregat, wie sie mit den Merkmalen des Oberbegriffes von Anspruch 1 beschrieben ist.The invention relates to a heat barrier for a centrifugal pump unit, as with the features of The preamble of claim 1 is described.

Eine derartige Wärmesperre ist beispielsweise in der DE-C 30 16 681 beschrieben. Die hier als Bausatz ausgebildete Wärmesperre stellt ein Bauteil dar, welches eine große axiale Erstreckung aufweist und über zwei Flanschflächen verfügt, von denen die eine pumpenseitig und die andere motorseitig angeordnet ist. Im Bereich einer ein Pumpenlaufrad antreibenden Welle verfügt die Wärmesperre über eine druckdichte Verbindung. Zwischen den Flanschen sind verschiedene Einsätze angeordnet. Sie dienen zur Kräfteübertragung zwischen den Flanschflächen und gleichzeitig mit ihren wärmeabstrahlenden Flächen zur Kühlung. Dieses von ihrer wärmedämmenden Wirkung her gute Bauprinzip hat jedoch den Nachteil, daß es eine große axiale Erstreckung aufweist und damit das Schwingungsverhalten des gesamten Pumpenaggregates ungünstig beeinflussen kann. Die auswechselbaren, wärmedämmenden Elemente der Wärmesperre befinden sich auf erheblich kleinerem Durchmesser, als die kräfteübertragenden Verbindungselemente zwischen Pumpen- und Motorteilen. Diese Bauart kann bei den heutzutage erheblich größeren Pumpenleistungen ebenfalls einen ungünstigen Einfluß auf das Schwingungsverhalten des Pumpenaggregates ausüben.Such a heat barrier is described for example in DE-C 30 16 681. The heat barrier designed here as a kit represents a component which is a has a large axial extent and has two flange surfaces, one of which one is arranged on the pump side and the other on the motor side. In the area of one a pump impeller driving shaft has a heat barrier pressure-tight connection. There are different inserts between the flanges arranged. They serve to transfer forces between the flange surfaces and at the same time with their heat-radiating surfaces for cooling. This from theirs However, the good thermal insulation effect has the disadvantage that it has a large axial extent and thus the vibration behavior of the can adversely affect the entire pump set. The interchangeable, Thermal insulation elements of the thermal barrier are located on considerably smaller diameter than the force-transmitting connecting elements between pump and motor parts. This type of construction can be significant in today's world larger pump capacities also have an unfavorable influence on the Exercise the vibration behavior of the pump set.

Eine andere Lösung ist durch die GB-A 936 727 bekannt. Bei dieser Bauart sind Saug- und Druckstutzen des Pumpenaggregates in unmittelbarer Nähe der Wärmesperre angeordnet und in die Trennwand zwischen Pumpen- und Motorteil integriert. Dadurch ergeben sich große metallische Anlageflächen zwischen dem zu verbindenden Pumpen- und Motorteil sowie einem dazwischen eingespanntem Lagerschild des Motors. In einem scheibenförmigen Raum der Saug- und Druckstutzen aufweisenden Trennwand ist zwar eine Isolierung angeordnet und als Wärmesperre bezeichnet, jedoch aufgrund der großflächigen metallischen Anlageflächen und der dadurch zwangsläufig entstehenden direkten Wärmeleitung ist diese Wärmesperrenbauart von einer zusätzlichen Flüssigkeitskühlung abhängig.Another solution is known from GB-A 936 727. With this type are Suction and pressure ports of the pump unit in the immediate vicinity of the Thermal barrier arranged and in the partition between the pump and motor part integrated. This results in large metallic contact surfaces between the connecting pump and motor part and a clamped in between End shield of the engine. In a disc-shaped room the suction and Partition having pressure connection is indeed arranged and as Thermal barrier referred, however, due to the large metallic Contact surfaces and the resulting direct heat conduction this type of heat barrier is dependent on additional liquid cooling.

Der Erfindung liegt das Problem zugrunde, eine Wärmesperre zu entwickeln, die unter Verzicht auf eine zusätzliche externe und interne Kühleinrichtung eine steife Bauart eines Kreiselpumpenaggregates ermöglicht. Die Lösung dieser Aufgabe erfolgt mit den Merkmalen des Anspruches 1. Durch die Gewährleistung eines gradlinigen Kraftflusses zwischen Pumpen- und Motorteil kann eine sehr steife Konstruktion verwirklicht werden. Der Kraftfluß ist hierbei in unmittelbarer Nähe der Verbindungselemente vorgesehen. Die hierzu notwendige kräfteübertragende Anlage zwischen Pumpen- und Motorteil wird unterbrochen durch ein dazwischen befindliches isolierendes Keramikelement. Da ein gradliniger Kraftfluß zwischen den miteinander zu verbindenden Teilen besteht, wird das Keramikelement nur mit Druckkräften belastet. Der Raum zwischen Keramikelement und Wellendurchgang der Wärmesperre ist mit einem Isoliermaterial gefüllt, vorzugsweise auf keramischer Basis, welches aber keine kräfteübertragenden Wirkungen aufweist. Somit wird gewährleistet, daß ein Wärmeübergang durch Wärmestrahlung auf die Bauteile 2, 5 und 8 und die mit Flüssigkeit gefüllten Räume unterbunden wird. Bei dem hier Verwendung findenden Isoliermaterial hat sich eine Keramikfasermatte als vorteilhaft herausgestellt.The invention is based on the problem of developing a heat barrier that without an additional external and internal cooling device, a rigid one Design of a centrifugal pump unit enables. The solution to this task takes place with the features of claim 1. By ensuring a straight line flow of force between the pump and motor part can be a very stiff Construction can be realized. The power flow is in the immediate vicinity of the Fasteners provided. The necessary power transfer System between pump and motor part is interrupted by an in between insulating ceramic element. Because a straight line of force flows between the parts to be joined together, the ceramic element is only with Pressure forces. The space between the ceramic element and the shaft passage the heat barrier is filled with an insulating material, preferably ceramic Basis, but which has no force-transmitting effects. Thus ensures that heat transfer to the components 2, 5 by heat radiation and 8 and the liquid-filled spaces are prevented. With this one A ceramic fiber mat has been used as the insulating material emphasized advantageous.

Das Keramikelement kann ein- oder mehrteilig ausgebildet werden, wobei ein mehrteiliges Keramikelement einen größeren konstruktiven Freiraum ermöglicht. Das Keramikelement kann dann durch mehrere sektionsförmige Ringelemente gebildet werden, die mit entsprechender Formgebung auch bei unterschiedlichen Baugrößen verwendbar sind. Es ist auch möglich, beispielsweise durch das Aneinanderreihen von kleinen, scheibenförmigen, einzelnen Keramikelementen ein mehrteiliges ringförmiges Keramikelement zu bilden. Die scheibenförmigen kleinen Keramikelemente können dabei eine Kontur aufweisen, die eine einfache Herstellung ermöglicht und bei einer Aneinanderreihung die Bildung einer Ringform in einem konstruktiv vorgegebenen Bereich zuläßt.The ceramic element can be formed in one or more parts, one multi-part ceramic element allows greater structural freedom. The ceramic element can then by several section-shaped ring elements are formed with the appropriate shape even with different Sizes can be used. It is also possible, for example, through the String together small, disc-shaped, individual ceramic elements to form multi-part annular ceramic element. The disc-shaped little ones Ceramic elements can have a contour that is simple Production enables and with a string together the formation of a ring shape in a constructionally specified area.

Weitere Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben. Further refinements of the invention are described in the subclaims.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben. Es zeigen die

Fig. 1
eine Wärmesperre mit außerhalb der Befestigungsmittel befindlichem Keramikelement, die
Fig. 2
eine Wärmesperre, deren Befestigungsmittel das Keramikelement durchdringen, die
Fig. 3
zeigt den Aufbau eines mehrteiligen Keramikelementes und die
Fig. 4 - 6
verschiedene Bauformen der Einzelteile eines mehrteiligen Keramikelementes.
Embodiments of the invention are shown in the drawings and are described in more detail below. They show
Fig. 1
a heat barrier with ceramic element located outside the fastening means, the
Fig. 2
a heat barrier, the fasteners penetrate the ceramic element, the
Fig. 3
shows the structure of a multi-part ceramic element and the
4 - 6
Different designs of the individual parts of a multi-part ceramic element.

In der Fig. 1 ist als Ausschnitt aus einem Motorpumpenaggregat eine Wärmesperre dargestellt. Zwischen einen Pumpenteil 1 und einem Motorteil 2 ist eine Wärmesperre 3 angeordnet. Befestigungsmittel 4, die im Ausführungsbeispiel als Zuganker mit Befestigungsmutter ausgebildet sind, dienen dem Zusammenhalt der Teile. Die Wärmesperre 3 soll z. B. die Wicklungen 15 des Motorteiles 2 vor Temperaturbelastungen schützen, die vom heißen Pumpenteil 1 ausgehen können.In Fig. 1 is a section of a motor pump unit, a heat barrier shown. Between a pump part 1 and a motor part 2 is one Thermal barrier 3 arranged. Fastening means 4, which in the exemplary embodiment Tie rods are designed with a fastening nut, serve to hold the Parts. The heat barrier 3 should, for. B. the windings 15 of the motor part 2 before Protect temperature loads that can arise from hot pump part 1.

In der Fig. 1 ist eine Wärmesperre mit gekammertem Keramikelement 5 gezeigt. Es liegt im geradlinigen Kraftfluß 6 zwischen Pumpenteil 1 und Motorteil 2 und überträgt Kräfte zwischen diesen beiden Teilen. Dem Schutz des Keramikelementes 5 vor mechanischen Beschädigungen dienen die Wärmesperrenteile 7, 8, die als metallische Flanschelemente ausgebildet sein können und zwischen sich einen isolierenden Bereich aufweisen. Die Wärmesperrenteile 7, 8 liegen nur im Bereich der Welle 9 wärmeleitend aneinander, wo sie einen druckdichten dünnwandigen Wellendurchgang 10 bilden. Die Abmessungen des Wellendurchganges 10 sind entsprechend den mechanischen Belastungen und für minimalen Wärmeübergang ausgebildet. Im Bereich des Wellendurchganges 10 sind die beiden ineinander gepaßten Wärmesperrenteile 7, 8 durch eine Schweißnaht 11 flüssigkeits- und gasdicht miteinander verbunden. Eine keramische Isoliermasse 12 füllt den Raum 12.1 zwischen dem isolierenden, kräfteübertragenden Keramikelement 5 und dem Wellendurchgang 10 aus. Dadurch wird verhindert, daß unter Temperatureinfluß zusätzliche Spannungen in die Wärmesperre 3 entstehen und ein Wärmeübergang durch Wärmestrahlung auf die Bauteile 2, 5 und 8 und die mit Flüssigkeit gefüllten Räume unterbunden wird. Im Bereich der Verbindungselemente 4 überdeckt das Wärmesperrenteil 7 das Keramikelement 5 und hält es damit in seiner Position. Ein Spalt 13 zwischen den beiden Wärmesperrenteilen 7, 8 verhindert eine direkte Wärmeleitung zwischen den Teilen.1 shows a heat barrier with a chambered ceramic element 5. It lies in the rectilinear flow of force 6 between pump part 1 and motor part 2 and transmits Forces between these two parts. Protection of the ceramic element 5 from The heat barrier parts 7, 8 serve as mechanical damage metallic flange elements can be formed and one between them isolating area. The heat barrier parts 7, 8 are only in the area the shaft 9 thermally conductive to each other, where they have a pressure-tight thin-walled Form shaft passage 10. The dimensions of the shaft passage 10 are according to the mechanical loads and for minimal heat transfer educated. In the area of the shaft passage 10, the two are one inside the other fitted heat barrier parts 7, 8 by a weld 11 liquid and connected gastight. A ceramic insulating compound 12 fills the room 12.1 between the insulating, force-transmitting ceramic element 5 and the Shaft passage 10 out. This prevents that under the influence of temperature additional stresses arise in the heat barrier 3 and a heat transfer by heat radiation on components 2, 5 and 8 and those filled with liquid Rooms is prevented. This covers in the area of the connecting elements 4 Heat barrier part 7, the ceramic element 5 and thus holds it in position. A Gap 13 between the two heat barrier parts 7, 8 prevents a direct Heat conduction between the parts.

Die als Fig. 2 bezeichnete Bildhälfte des Ausschnittes eines Motorpumpenaggregates zeigt eine andere Bauform des Keramikelementes 5. Hier ist das Keramikelement mit Öffnungen 14 versehen, die zur Durchführung der Verbindungselemente 4 dienen. Die Anlagefläche zwischen den Wärmesperrenteilen 7, 8 und dem Keramikelement 5 kann somit größer ausgebildet werden. Die Öffnungen 14 sind in ihren Abmessungen so gestaltet, daß keine Berührungen zwischen dem Keramikelement 5 und den Befestigungsmitteln 4 stattfindet, so daß das Keramikelement nur mit Druckkräften belastet wird. Aneinandergrenzende Flächen des Keramikelementes sind mit entsprechenden Übergangsradien versehen, um unzulässige Kantenpressungen zu vermeiden.The designated half of the image of a section of a Motor pump unit shows a different design of the ceramic element 5. Here the ceramic element is provided with openings 14 for carrying out the Connection elements 4 serve. The contact surface between the Heat barrier parts 7, 8 and the ceramic element 5 can thus be made larger become. The openings 14 are designed in their dimensions so that none Touches between the ceramic element 5 and the fastening means 4 takes place so that the ceramic element is only loaded with compressive forces. Adjacent surfaces of the ceramic element are covered with corresponding Provide transition radii to avoid impermissible edge pressures.

In seiner einfachsten Form ist das Keramikelement 5 als Kreisring ausgebildet, der leicht herzustellen ist. Die Verwendung eines einteiligen Keramikteiles 5 erfordert eine zweiteilige Bauart der Wärmesperre. Das Keramikelement kann auch mehrteilig ausgebildet sein. Ein segmentförmiger Aufbau würde beispielsweise die Verwendung einer einteiligen Wärmesperrenbauart ermöglichen. Durch geeignete Wahl der Form und der Größe der einzelnen Segmente kann für unterschiedliche Baugrößen von Wärmesperren das jeweils passende Keramikelement zusammengesetzt werden. Durch die sehr hohe Isolationswirkung des Keramikelementes 5 kann dessen axiale Erstreckung auf ein Minimum reduziert werden. Daraus resuliert eine kurze Baulänge, die sich wiederum positiv auf das dynamische Verhalten einer durch die Wärmesperre 3 hindurchgeführten Welle 9 und damit verbundener Bauteile auswirkt. Ein auf der Welle 9 fliegend gelagertes - hier nicht dargestelltes - Laufrad erreicht durch den kurzen Wellenüberhang ein wesentlich besseres Laufverhalten. Unter Umständen kann damit ein gegebenenfalls erforderliches drittes Radiallager eingespart werden. Die Anordnung des isolierenden Keramikelementes 5 im geradlinigen Kraftfluß 6 zwischen den miteinander verbundenen Bauteilen gewährleistet bei verbesserter Isolationswirkung eine steifere Bauart des gesamten Pumpenaggregates. Die günstigsten Spannungsverhältnisse haben sich ergeben, wenn ein Keramikelement Verwendung findet, welches in die Gruppe der Zirkonoxide gehört. Da deren Ausdehnungskoeffizent vergleichbar mit dem der Eisenwerkstoffe der Wärmesperrenteile ist, sind durch unterschiedliches Ausdehnungsverhalten bedingte Bauteil-Spannungen sehr gering. Selbstverständlich sind auch andere Keramikmaterialien verwendbar, wobei dann bekannte konstruktive Maßnahmen zur Kompensation unterschiedlichen Ausdehnungsverhaltens zu treffen sind.In its simplest form, the ceramic element 5 is designed as a circular ring is easy to manufacture. The use of a one-piece ceramic part 5 requires a two-part design of the heat barrier. The ceramic element can also consist of several parts be trained. A segmented structure would, for example Allow use of a one-piece heat barrier design. By suitable Choice of shape and size of each segment can be different Sizes of heat barriers the appropriate ceramic element be put together. Due to the very high insulation effect of the Ceramic element 5 can reduce its axial extent to a minimum become. This results in a short overall length, which in turn has a positive effect on the dynamic behavior of a shaft 9 passed through the heat barrier 3 and associated components. One flying on wave 9 stored - not shown here - reached by the short Wave overhang a much better running behavior. Under certain circumstances so that a third radial bearing, if necessary, is saved. The Arrangement of the insulating ceramic element 5 in the rectilinear flow of force 6 guaranteed between the interconnected components with improved Isolation effect a stiffer design of the entire pump unit. The Favorable stress conditions have arisen when a ceramic element Is used, which belongs to the group of zirconium oxides. Because of that Expansion coefficient comparable to that of the iron materials of the Heat barrier parts are due to different expansion behavior component stresses very low. Of course there are others too Ceramic materials can be used, then known design measures for Compensation of different expansion behavior must be taken.

In der Fig. 3 ist eine Variante einer mehrteiligen Ausbildung eines Keramikelementes 5 gezeigt. Durch eine Vielzahl von einzelnen kleinen Keramikelementen 5.1, die in einem der Wärmesperrenteile 7, 8 spielfrei gehalten sind, kann eine Reduzierung der Herstellungskosten erlangt werden. Die Form der Keramikelemente 5.1 wird dabei so gewählt, daß am Einbauort deren dichte und gleichmäßige Anordnung möglich ist. Dazu sind die Außenabmessungen der Keramikelemente 5.1 und der Durchmesser am Einbauort der Keramikelemente aufeinander abgestimmt.3 is a variant of a multi-part design of a ceramic element 5 shown. Through a variety of individual small ceramic elements 5.1, which in one of the heat barrier parts 7, 8 are kept free of play, a reduction of the manufacturing costs can be obtained. The shape of the ceramic elements 5.1 chosen so that their dense and uniform arrangement at the installation site is possible. For this purpose, the outer dimensions of the ceramic elements 5.1 and Diameter matched at the installation location of the ceramic elements.

Dies ermöglicht es, mit einer geringen Anzahl von Bauformen der Keramikelemente 5.1 eine große Anzahl von Durchmesserbereichen auszufüllen. Dazu können auch, wie in den Fig. 4 - 6 dargestellt, verschiedene Bauformen von Keramikelementen 5.1 - 5.3 miteinkombiniert werden. Die gezeigten Bauformen rund und sichelförmig sind nur Beispiele und es können auch andere Bauformen wie trapezförmig oder linienförmig Verwendung finden, die die Bildung eines ringförmigen Keramikelementes 5 in mehrteiliger Bauart zulassen. Beispiele sind in den Fig. 4 - 6 gezeigt. Es ist eine einfache Optimierung, durch welche Bauform und Größe eines Keramikelementes 5.1 - 5.3, welche Durchmesserbereiche zur Bildung eines mehrteiligen Keramikelementes 5 abgedeckt werden sollen. Mit dem Begriff Durchmesserbereiche bzw. ringförmig ist der Erfindungsgegenstand jedoch nicht auf kreisförmige Anordnungen beschränkt. Die Form des Umfanges eines ringförmigen, ein- oder mehrteiligen Keramikelementes kann selbstverständlich auch von einer Kreisform abweichen und elliptisch, eckig, polygonal oder anders geformt bzw. angeordnet sein.This makes it possible with a small number of designs of the ceramic elements 5.1 fill in a large number of diameter ranges. In addition, As shown in FIGS. 4-6, different designs of ceramic elements 5.1 - 5.3 can be combined. The designs shown are round and crescent-shaped only examples and other designs such as trapezoidal or find linear use that form the formation of a ring Allow ceramic element 5 in multi-part design. Examples are in Figs. 4-6 shown. It is a simple optimization through which design and size of a Ceramic element 5.1 - 5.3, which diameter ranges to form a multi-part ceramic element 5 to be covered. With the term However, the subject matter of the invention is not of diameter ranges or annular circular arrangements limited. The shape of the circumference of an annular, one-piece or multi-part ceramic element can of course also from one Deviate from a circular shape and are elliptical, angular, polygonal or differently shaped or be arranged.

Ein ringförmiges, mehrteiliges Keramikelement 5 kann auch durch die Aneinanderreihung von kleinen Keramikelementen 5.1 - 5.3 unterschiedlicher Kontur gebildet werden. Wie die Fig. 4 und 5 zeigen sind die kleinen Keramikelemente 5.1 - 5.3 bevorzugt auf Durchmesserbereichen angeordnet, die kleiner sind als der Durchmesserbereich, in dem die Befestigungsmittel 4 befindlich sind. Durch geeignete Auswahl und Anordnung von kleinen Keramikelementen 5.1 - 5.3 kann das mehrteilige Keramikelement 5 auch auf größerem Durchmesser angeordnet sein. Gemäß Fig. 6 ist dies beispielsweise durch Anordnung von sichelförmigen kleinen Keramikelementen 5.2 beiderseits der Befestigungsmittel 4 möglich. Um eine großflächige Anlage von Keramikelementen zu erhalten, können als Ausgleichsteile wirkende, bikonkav oder bikonvex gestaltete Keramikelemente 5.3 in ein mehrteilig gestaltetes Keramikelement 5 integriert werden.An annular, multi-part ceramic element 5 can also by Stringing together small ceramic elements 5.1 - 5.3 of different contours be formed. 4 and 5 show the small ceramic elements 5.1 - 5.3 preferably arranged on diameter ranges that are smaller than that Diameter range in which the fastening means 4 are located. By suitable selection and arrangement of small ceramic elements 5.1 - 5.3 can the multi-part ceramic element 5 is also arranged on a larger diameter be. 6, this is for example by arranging sickle-shaped small ceramic elements 5.2 possible on both sides of the fastening means 4. To one Obtaining large areas of ceramic elements can be used as compensating parts acting, biconcave or biconvex ceramic elements 5.3 in a multi-part designed ceramic element 5 are integrated.

Claims (8)

  1. Heat barrier which is arranged between a pump part (1) conveying hot media and a motor part (2), fastening means (4) holding the pump part (1) and motor part (2) together, characterized in that there is a rectilinear force flow (6) in the heat barrier (3) in the force flow, generated by the fastening means, (4) between the pump part (1) and motor part (2), and in that a force-transmitting and insulating ceramic element (5) is arranged in the rectilinear force flow (6) of the heat barrier (3).
  2. Heat barrier according to Claim 1, characterized in that the ceramic element (5) is of unipartite or multipartite construction.
  3. Heat barrier according to Claim 1 or 2, characterized in that the ceramic element (5) is of annular construction.
  4. Heat barrier according to Claims 1 to 3, characterized in that a space (12.1) filled with a ceramic insulating material (12) is located between a shaft (9) connecting the pump and motor parts (1; 2) and the ceramic element (5).
  5. Heat barrier according to Claim 4, characterized in that between the space (12.1) and shaft (9), the heat barrier (3) is provided in a way known per se with a thin-walled, pressure-proof and gastight shaft passage (10) between a motor-side and pump-side heat barrier part (7, 8).
  6. Heat barrier according to one of Claims 1 to 5, characterized in that the ceramic element (5) is provided with penetrations (14), running in the shaft direction, for holding fastening means (4).
  7. Heat barrier according to one of Claims 1 to 6, characterized in that a thermally conducting, metallic connection of the heat barrier (3) exists only in the region of the shaft passage (10).
  8. Heat barrier according to one of Claims 1 to 7, characterized in that the unipartite or multipartite ceramic element (5) is formed from a ceramic from the group of the zirconium oxides.
EP96102056A 1995-03-09 1996-02-13 Heat barrier for a centrifugal pump assembly Expired - Lifetime EP0731280B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508321A DE19508321A1 (en) 1995-03-09 1995-03-09 Centrifugal pump unit with integrated heat barrier
DE19508321 1995-03-09

Publications (2)

Publication Number Publication Date
EP0731280A1 EP0731280A1 (en) 1996-09-11
EP0731280B1 true EP0731280B1 (en) 1999-06-16

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EP96102056A Expired - Lifetime EP0731280B1 (en) 1995-03-09 1996-02-13 Heat barrier for a centrifugal pump assembly

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US (1) US5626460A (en)
EP (1) EP0731280B1 (en)
AT (1) ATE181403T1 (en)
DE (2) DE19508321A1 (en)
IN (1) IN189392B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19721196A1 (en) 1997-05-21 1998-11-26 Klein Schanzlin & Becker Ag Machine unit with integrated heat barrier
US6200086B1 (en) * 1999-08-04 2001-03-13 Sundyne Corporation Thermal barrier for use in a mechanical seal assembly
DE10057183A1 (en) * 2000-11-17 2002-05-23 Ksb Ag Magnetic coupling pump for hot fluids
DE10312766B4 (en) * 2003-03-21 2015-08-13 Sew-Eurodrive Gmbh & Co Kg gearmotor
CA2736952C (en) 2008-09-10 2016-11-29 Pentair Pump Group, Inc. High-efficiency, multi-stage centrifugal pump and method of assembly
DE102010055674A1 (en) * 2010-12-22 2012-06-28 Multivac Sepp Haggenmüller Gmbh & Co. Kg Drive unit with seal
GB201309049D0 (en) * 2013-05-20 2013-07-03 Rolls Royce Engine Control Systems Ltd Fuel pumping unit
DE202015103453U1 (en) * 2015-07-01 2016-10-05 A. u. K. Müller GmbH & Co. KG fluid pump
CN113417848A (en) * 2021-07-01 2021-09-21 哈尔滨电气动力装备有限公司 Heat shield with ceramic fiber structure

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB936727A (en) * 1960-01-26 1963-09-11 Klein Schanzlin & Becker Ag Sealed unit comprising a centrifugal pump and an electric driving motor
US3203353A (en) * 1964-03-12 1965-08-31 Armstrong Ltd S A Motor pump unit
US3465681A (en) * 1967-08-24 1969-09-09 March Mfg Co Magnetically-coupled pump with detachable motor
US3500754A (en) * 1968-01-25 1970-03-17 Loewe Pumpenfabrik Gmbh Centrifugal pump units
DE2331039C2 (en) * 1973-06-19 1984-05-10 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Coolant circulation pump
DE2710443A1 (en) * 1977-03-10 1978-09-14 Klein Schanzlin & Becker Ag HEAT BARRIER FOR HIGH TEMPERATURE CIRCULATION PUMPS
DE2748393A1 (en) * 1977-10-28 1979-05-03 Klein Schanzlin & Becker Ag High temp. and pressure boiler heat barrier - has air flow gap between envelope and pump ensuring cooling
DE3016681C2 (en) * 1980-04-30 1986-01-02 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Thermal barrier for high temperature circulating pumps without stuffing box
JPS59217671A (en) * 1983-05-26 1984-12-07 日本特殊陶業株式会社 Heat insulating mechanism using pratially stabilized zirconia sintered body
JPS60101201A (en) * 1983-11-08 1985-06-05 Ngk Spark Plug Co Ltd Joining structure in turbine shaft
DE3644664A1 (en) * 1986-12-30 1988-07-14 Didier Werke Ag Aluminium titanate ceramic and use thereof

Also Published As

Publication number Publication date
DE19508321A1 (en) 1996-09-12
US5626460A (en) 1997-05-06
EP0731280A1 (en) 1996-09-11
DE59602211D1 (en) 1999-07-22
IN189392B (en) 2003-02-15
ATE181403T1 (en) 1999-07-15

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