EP3957862A1 - Pump system with medium-cooled fluid pump - Google Patents
Pump system with medium-cooled fluid pump Download PDFInfo
- Publication number
- EP3957862A1 EP3957862A1 EP21189567.7A EP21189567A EP3957862A1 EP 3957862 A1 EP3957862 A1 EP 3957862A1 EP 21189567 A EP21189567 A EP 21189567A EP 3957862 A1 EP3957862 A1 EP 3957862A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- chamber
- cooling jacket
- liquid
- housing
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 238000005086 pumping Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage 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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
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- 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
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
Definitions
- the invention relates to a pump system with a collection tank for liquid and a liquid pump with a housing that forms a suction opening, a pump chamber, an outlet connection and a motor chamber, a shaft that is rotatably mounted in the housing and on which an impeller is arranged inside the pump chamber and on which in a section lying outside the pumped medium, a rotor of an electric motor is arranged, which is surrounded by a stator arranged in the motor chamber, and with a cooling jacket surrounding the motor chamber, which is in fluid connection on the one hand with the pump chamber and on the other hand with the outlet connection, with a Pressure line, which connects the pump chamber to the cooling jacket, opens into the cooling jacket in a first circumferential position and the outlet connection is connected to the cooling jacket in a second circumferential position.
- U.S.A. 4,747,757 describes a medium-cooled liquid pump of the type mentioned above, which is designed as a submersible pump, so that under normal operating conditions the housing, including the part accommodating the motor, is complete is immersed in the liquid in the reservoir so that the motor can be cooled by the surrounding medium.
- the pump chamber is the outlet Pressure line connected to a cooling jacket that surrounds the motor so that the pumped medium flows around the motor. This ensures that the motor is always cooled by the pumped medium.
- air-cooled pumps are used in pump systems in which the pump is only immersed with its suction opening in the liquid to be pumped, while the part of the housing that accommodates the motor is always above the liquid level, since with these pumps there is no risk of liquid from the sump into the air cooling system for the pump motor.
- the object of the invention is to create a pump system with a reduced overall height.
- the basic idea of the solution according to the invention is that a medium-cooled pump with a cooling jacket surrounding the motor is also used in pump systems in which an air-cooled pump could be used without risk.
- the liquid pump has a peripheral mounting flange designed to mount the pump on the reservoir for the liquid to be pumped.
- the fastening flange is then arranged at the level of the end of the cooling jacket facing the pump chamber.
- the pump can be mounted directly on a cover or other holding device at the level of the upper edge of the collection basin, so that only the part of the housing that accommodates the motor protrudes above the collection basin.
- the first and second circumferential positions of the water jacket are diametrically opposed to each other. From the pressure line, the medium then branches into two streams, which flow around the motor chamber in opposite directions of rotation and reunite when they enter the outlet port.
- the pressure line enters the lower end of the cooling jacket, while the outlet nozzle is preferably arranged radially outwards at the upper end of the cooling jacket, so that the flow of the medium in the cooling jacket also has an upward component. This avoids the formation of zones with low liquid exchange in the cooling jacket and at the same time facilitates venting of the pump.
- the subject of the invention is also a pumping system, e.g. In this case, the pump does not need to have a mounting flange.
- the pump shown has a housing 10 which forms a suction opening 12 in the region of its lower end and a pump chamber 14 further above.
- a shaft 16 is rotatably mounted in the housing 10 and carries at least one impeller 18 within the pump chamber 14.
- a cascade of three radial impellers is provided, which conveys the medium sucked in via the suction opening 12, for example a cooling liquid, into a pressure line 20 promote, which emanates from the upper end of the pump chamber 14 in a relation to the shaft 16 radially offset position.
- the pump is mounted in a reservoir 22 for the cooling liquid in such a way that the axis of the shaft 16 is oriented vertically and the intake opening 12 is just above the bottom 24 of the reservoir 22 .
- the liquid level 26 of the liquid in the reservoir 22 is indicated by a dashed line.
- the lower part of the pump which forms the suction opening 12, the pump chamber 14 and the lower part of the pressure line 20, is immersed in the cooling liquid, while the upper part of the pump is above the liquid level 26.
- This upper part of the housing 10 accommodates an electric motor 28, which in this way can be better protected against harmful effects of the pumped medium.
- the shaft 16 is mounted axially fixed in the housing 10 with its section lying above the liquid level 26 by means of roller bearings 29 and runs through a motor chamber 30 which is closed off at the upper end by a cover 32 .
- a rotor 34 of the electric motor is rotatably mounted within the motor chamber 30 on the shaft 16 and is surrounded by a stator 36 which is held stationary in the motor chamber 30 and is in thermal contact via its outer peripheral surface with a peripheral wall 38 of the motor chamber.
- the motor chamber 30 is surrounded for most of its height by a cooling jacket 40, the walls of which are formed in one piece with the peripheral wall 38 of the motor chamber.
- the cooling jacket 40 has an overall cylindrical shape and forms an annular chamber 42.
- the pressure line 20 opens out in a first circumferential position A, right in 1 , into the lower end of the annular chamber 42.
- a radially outgoing outlet connection 44 is connected to the upper end of the cooling jacket 40, via which the medium pumped by the pump reaches a delivery line (not shown).
- the outlet socket is still below the upper end windings of the stator, which in this example protrude upwards over the cooling jacket. In this way, the outlet nozzle can be arranged at the upper end of the cooling jacket for better ventilation without increasing the overall height of the pump.
- the liquid is drawn in via the suction opening 12 and via the pressure line 20 into the annular chamber 42 of the cooling jacket 40 pressed.
- the flow of the medium branches into two branches which flow around the motor chamber 30 in opposite directions and reunite in the circumferential position B, as in FIG 2 indicated by arrows.
- the medium flowing through the annular chamber 42 forms a closed body of water around the pump motor, which is not interrupted by any sound bridges, whereby good sound insulation and thus very quiet operation of the pump are achieved at the same time.
- the mouth of the pressure line 20 and the transition to the outlet port could also be close together and separated by a partition.
- the height of the cooling jacket 42 can be dimensioned in such a way that the winding packets of the stator 36 are cooled in a targeted manner.
- the motor chamber 30, which also accommodates the roller bearing 29 for the shaft 16 is sealed by a shaft seal 46 from the interior of the collecting basin 22.
- the pump may include a level sensor and electronic control by which the liquid level 26 is sensed and controlled to remain safely below the shaft seal 46 position at all times.
- the peripheral wall of the pump chamber 14 is formed by three annular modules 48 which are stacked one on top of the other and sealed against one another and which each accommodate one of the impellers 18 .
- the intake port 12 is formed in a separate housing part which is connected by tie bolts 50 to the rest of the housing. In this way, the ring modules can be clamped together tightly and securely. After loosening the tie bolt 50 and removing the separate housing part, the The number of ring modules 48 and the running wheels 18 can be varied as required or according to the available overall height.
- the liquid pump 10 shown has, at the level of the lower end (facing the pump chamber 14) of the cooling jacket 40, a circumferential, annular fastening flange 52 which is designed to mount the housing 10 on a cover 54 of the collecting basin 22 in such a way that only the lower, part of the housing accommodating the pump chamber 14 is immersed in the liquid in the reservoir.
- the fastening flange 52 also forms a flange connection between an upper housing part 56, which accommodates the cooling jacket 40 and the motor chamber 30, and a lower housing part 58, which forms the pressure line 20, among other things.
- This division of the housing 10 facilitates the manufacture of the housing by means of a mold.
- this arrangement of the fastening flange 52 minimizes the height by which the housing 10 projects beyond the top of the collecting basin 22 . It is thereby ensured that the shaft seal 46 is always above the liquid level 26 and thus the probability is minimized that liquid from the collecting basin 22 passes through the shaft seal into the motor chamber.
- the housing portion 58 Immediately below the mounting flange 52, the housing portion 58 has a circular outer contour centered on the axis of the shaft 16. As shown in FIG. The housing 10 can thus be easily inserted into a circular installation opening in the cover 54 and fixed to the cover in such a way that the installation opening is tightly closed.
- FIG. 3 shows a cross section of the housing 10 in the section plane III-III in 1
- the mounting flange 52 can be seen here in plan view.
- the upper and lower housing parts 54, 56 have radially projecting lugs 60 which lie flat on one another and each receive one of a plurality of connecting screws 62 which Hold the housing parts together tightly. In 1 two pairs of these approaches are shown in section.
- the mounting flange 52 has screw holes 64 for mounting screws, not shown, with which the housing 10 is fastened on the cover 54.
- FIG. 4 shows an axial section, analogous to 1 , by a pumping system according to another embodiment. Identical or corresponding parts are in figures 1 and 4 with the same but in 4 reference numerals increased by 100.
- the liquid pump 110 according to FIG 4 differs according to the pump 1 essentially only in that the housing does not have a fastening flange, but is held in position relative to the liquid basin 122 in some other way that is not shown in detail here.
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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
Flüssigkeitspumpe mit einem Gehäuse (10), das eine Ansaugöffnung (12), eine Pumpenkammer (14), einen Auslassstutzen (44) und eine Motorkammer (30) bildet, einer drehbar im Gehäuse gelagerten Welle (16), auf der innerhalb der Pumpenkammer (14) ein Laufrad (18) angeordnet ist und auf der in einem außerhalb des gepumpten Mediums liegenden Abschnitt ein Rotor (34) eines Elektromotors (28) angeordnet ist, der von einem in der Motorkammer (30) angeordneten Stator (36) umgeben ist, und mit einem die Motorkammer umgebenden Kühlmantel (40), der einerseits mit der Pumpenkammer (14) und andererseits mit dem Auslassstutzen (44) in Fluidverbindung steht, wobei eine Druckleitung (20), die die Pumpenkammer (14) mit dem Kühlmantel (42) verbindet, in einer ersten Umfangsposition (A) in den Kühlmantel (42) mündet und der Auslassstutzen (44) in einer zweiten Umfangsposition (B) an den Kühlmantel (42) angeschlossen ist, dadurch gekennzeichnet, dass das Gehäuse (10) einen umlaufenden Befestigungsflansch (52) aufweist, der dazu ausgebildet ist, die Pumpe auf einem Sammelbecken (22) für die zu pumpende Flüssigkeit zu montieren, und dass der Befestigungsflansch (52) in Höhe des der Pumpenkammer (14) zugewandten Endes des Kühlmantels (40) angeordnet ist.Liquid pump with a housing (10), which forms a suction opening (12), a pump chamber (14), an outlet connection (44) and a motor chamber (30), a shaft (16) rotatably mounted in the housing and on which, within the pump chamber ( 14) an impeller (18) is arranged and on which a rotor (34) of an electric motor (28) is arranged in a section lying outside the pumped medium, which rotor is surrounded by a stator (36) arranged in the motor chamber (30), and with a cooling jacket (40) surrounding the motor chamber, which is in fluid communication with the pump chamber (14) on the one hand and with the outlet connection piece (44) on the other hand, a pressure line (20) connecting the pump chamber (14) with the cooling jacket (42) connects, opens into the cooling jacket (42) in a first circumferential position (A) and the outlet connection (44) is connected to the cooling jacket (42) in a second circumferential position (B), characterized in that the housing (10) has a circumferential fastening flange (5 2) designed to mount the pump on a reservoir (22) for the liquid to be pumped, and in that the fixing flange (52) is located at the level of the end of the cooling jacket (40) facing the pumping chamber (14).
Description
Die Erfindung betrifft ein Pumpsystem mit einem Sammelbecken für Flüssigkeit sowie eine Flüssigkeitspumpe mit einem Gehäuse, das eine Ansaugöffnung, eine Pumpenkammer, einen Auslassstutzen und eine Motorkammer bildet, einer drehbar im Gehäuse gelagerten Welle, auf der innerhalb der Pumpenkammer ein Laufrad angeordnet ist und auf der in einem außerhalb des gepumpten Mediums liegenden Abschnitt ein Rotor eines Elektromotors angeordnet ist, der von einem in der Motorkammer angeordneten Stator umgeben ist, und mit einem die Motorkammer umgebenden Kühlmantel, der einerseits mit der Pumpenkammer und andererseits mit dem Auslassstutzen in Fluidverbindung steht, wobei eine Druckleitung, die die Pumpenkammer mit dem Kühlmantel verbindet, in einer ersten Umfangsposition in den Kühlmantel mündet und der Auslassstutzen in einer zweiten Umfangsposition an den Kühlmantel angeschlossen ist.The invention relates to a pump system with a collection tank for liquid and a liquid pump with a housing that forms a suction opening, a pump chamber, an outlet connection and a motor chamber, a shaft that is rotatably mounted in the housing and on which an impeller is arranged inside the pump chamber and on which in a section lying outside the pumped medium, a rotor of an electric motor is arranged, which is surrounded by a stator arranged in the motor chamber, and with a cooling jacket surrounding the motor chamber, which is in fluid connection on the one hand with the pump chamber and on the other hand with the outlet connection, with a Pressure line, which connects the pump chamber to the cooling jacket, opens into the cooling jacket in a first circumferential position and the outlet connection is connected to the cooling jacket in a second circumferential position.
In
Bei Pumpsystemen, bei denen die Pumpe nur mit ihrer Ansaugöffnung in die zu pumpende Flüssigkeit eintaucht, während der den Motor aufnehmende Teil des Gehäuses sich stets oberhalb des Flüssigkeitsspiegels befindet, werden dagegen luftgekühlte Pumpen eingesetzt, da bei diesen Pumpen nicht die Gefahr besteht, dass Flüssigkeit aus dem Sammelbecken in das Luftkühlungssystem für den Pumpenmotor gelangt.On the other hand, air-cooled pumps are used in pump systems in which the pump is only immersed with its suction opening in the liquid to be pumped, while the part of the housing that accommodates the motor is always above the liquid level, since with these pumps there is no risk of liquid from the sump into the air cooling system for the pump motor.
Aufgabe der Erfindung ist, ein Pumpsystem mit verringerter Bauhöhe zu schaffen.The object of the invention is to create a pump system with a reduced overall height.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen der unabhängigen Ansprüche 1 und 8 gelöst.According to the invention, this object is achieved with the features of independent claims 1 and 8 .
Der Grundgedanke der erfindungsgemäßen Lösung besteht darin, dass auch bei Pumpsystemen, bei denen gefahrlos eine luftgekühlte Pumpe eingesetzt werden könnte, eine mediumgekühlte Pumpe mit einem den Motor umgebenden Kühlmantel eingesetzt wird.The basic idea of the solution according to the invention is that a medium-cooled pump with a cooling jacket surrounding the motor is also used in pump systems in which an air-cooled pump could be used without risk.
Der Vorteil dieser Lösung besteht darin, dass kein Gebläse zum Erzeugen eines Kühlluftstromes benötigt wird und deshalb die Bauhöhe, gemessen vom Boden des Sammelbeckens bis zum Scheitel des Pumpengehäuses, deutlich reduziert werden kann.The advantage of this solution is that no fan is required to generate a flow of cooling air and therefore the overall height, measured from the bottom of the collecting tank to the top of the pump housing, can be significantly reduced.
In einer Ausführungsform weist die Flüssigkeitspumpe einen umlaufenden Befestigungsflansch auf, der dazu ausgebildet ist, die Pumpe auf dem Sammelbecken für die zu pumpende Flüssigkeit zu montieren. Der Befestigungsflansch ist dann in Höhe des der Pumpenkammer zugewandten Endes des Kühlmantels angeordnet.In one embodiment, the liquid pump has a peripheral mounting flange designed to mount the pump on the reservoir for the liquid to be pumped. The fastening flange is then arranged at the level of the end of the cooling jacket facing the pump chamber.
Mit Hilfe des Befestigungsflansches lässt sich die Pumpe unmittelbar auf einem Deckel oder einer anderen Haltevorrichtung in Höhe des oberen Randes des Sammelbeckens befestigen, so dass nur der den Motor aufnehmende Teil des Gehäuses das Sammelbecken nach oben überragt.With the help of the mounting flange, the pump can be mounted directly on a cover or other holding device at the level of the upper edge of the collection basin, so that only the part of the housing that accommodates the motor protrudes above the collection basin.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous refinements and developments of the invention are specified in the dependent claims.
In einer Ausführungsform liegen die ersten und zweiten Umfangspositionen des Kühlmantels einander diametral gegenüber. Von der Druckleitung aus verzweigt sich dann das Medium in zwei Ströme, die die Motorkammer in entgegengesetzten Drehrichtungen umströmen und sich beim Eintritt in den Auslassstutzen wieder vereinigen.In one embodiment, the first and second circumferential positions of the water jacket are diametrically opposed to each other. From the pressure line, the medium then branches into two streams, which flow around the motor chamber in opposite directions of rotation and reunite when they enter the outlet port.
Die Druckleitung tritt in das untere Ende des Kühlmantels ein, während der Auslassstutzen vorzugsweise radial abgehend am oberen Ende des Kühlmantels angeordnet ist, so dass die Strömung des Mediums im Kühlmantel auch eine aufwärts gerichtete Komponente hat. Dadurch wird die Entstehung von Zonen mit geringem Flüssigkeitsaustausch im Kühlmantel vermieden und zugleich die Entlüftung der Pumpe erleichtert.The pressure line enters the lower end of the cooling jacket, while the outlet nozzle is preferably arranged radially outwards at the upper end of the cooling jacket, so that the flow of the medium in the cooling jacket also has an upward component. This avoids the formation of zones with low liquid exchange in the cooling jacket and at the same time facilitates venting of the pump.
Gegenstand der Erfindung ist auch ein Pumpsystem, beispielsweise für eine Kühlanlage, bei dem die Pumpe auf irgendeine andere Weise so gehalten ist, dass sie mit ihrem Ansaugstutzen in die Flüssigkeit im Sammelbecken eintaucht, während die Motorkammer sich oberhalb des Flüssigkeitsspiegels befindet. In dem Fall braucht die Pumpe keinen Befestigungsflansch aufzuweisen.The subject of the invention is also a pumping system, e.g. In this case, the pump does not need to have a mounting flange.
Im Folgenden werden ein Ausführungsbeispiele anhand der Zeichnung näher erläutert.An exemplary embodiment is explained in more detail below with reference to the drawing.
Es zeigen:
- Fig. 1
- einen axialen Schnitt durch eine erfindungsgemäße Pumpe im montierten Zustand auf einem Sammelbecken;
- Fig. 2
- einen Schnitt längs der Linie II-II in
Fig. 1 ; - Fig. 3
- einen Schnitt längs der Linie III-III in
Fig. 1 ; und - Fig. 4
- einen axialen Schnitt durch ein Pumpsystem gemäß einem anderen Ausführungsbeispiel.
- 1
- an axial section through a pump according to the invention in the assembled state on a reservoir;
- 2
- a section along the line II-II in
1 ; - 3
- a section along the line III-III in
1 ; and - 4
- an axial section through a pumping system according to another embodiment.
Die in
Im gezeigten Beispiel ist die Pumpe so in einem Sammelbecken 22 für die Kühlflüssigkeit montiert, dass die Achse der Welle 16 vertikal orientiert ist und die Ansaugöffnung 12 sich dicht über dem Boden 24 des Sammelbeckens 22 befindet. Der Flüssigkeitsspiegel 26 der Flüssigkeit im Sammelbecken 22 ist durch eine gestrichelte Linie angedeutet.In the example shown, the pump is mounted in a
Die Pumpe taucht mit ihrem unteren Teil, der die Ansaugöffnung 12, die Pumpenkammer 14 und den unteren Teil der Druckleitung 20 bildet, in die Kühlflüssigkeit ein, während sich der obere Teil der Pumpe oberhalb des Flüssigkeitsspiegels 26 befindet. Dieser obere Teil des Gehäuses 10 nimmt einen Elektromotor 28 auf, der auf diese Weise besser gegen schädliche Wirkungen des gepumpten Mediums geschützt werden kann.The lower part of the pump, which forms the suction opening 12, the
Die Welle 16 ist mit ihrem oberhalb des Flüssigkeitspegels 26 liegenden Abschnitt mittels Wälzlagern 29 axialfest im Gehäuse 10 gelagert und durchläuft eine Motorkammer 30, die am oberen Ende durch einen Deckel 32 abgeschlossen ist. Ein Rotor 34 des Elektromotors ist innerhalb der Motorkammer 30 drehfest auf der Welle 16 angeordnet und ist von einem Stator 36 umgeben, der stationär in der Motorkammer 30 gehalten ist und über seine äußere Umfangsfläche in thermischem Kontakt mit einer Umfangswand 38 der Motorkammer steht.The
Die Motorkammer 30 ist auf dem größten Teil ihrer Höhe von einem Kühlmantel 40 umgeben, dessen Wände in einem Stück mit der Umfangswand 38 der Motorkammer ausgebildet sind. Der Kühlmantel 40 hat insgesamt eine zylindrische Form und bildet eine Ringkammer 42. Die Druckleitung 20 mündet in einer ersten Umfangsposition A, rechts in
Wenn die Pumpe in Betrieb ist, wird die Flüssigkeit über die Ansaugöffnung 12 angesaugt und über die Druckleitung 20 in die Ringkammer 42 des Kühlmantels 40 gedrückt. In der ersten Umfangsposition A verzweigt sich die Strömung des Mediums in zwei Äste, die die Motorkammer 30 gegensinnig umströmen und sich in der Umfangsposition B wieder vereinigen, wie in
Das durch die Ringkammer 42 strömende Medium bildet bei dem hier gezeigten Beispiel um den Pumpenmotor herum einen geschlossen Wasserkörper, der durch keinerlei Schallbrücken unterbrochen wird, wodurch zugleich eine gute Schalldämmung und somit ein sehr leiser Lauf der Pumpe erreicht wird.In the example shown here, the medium flowing through the
In einer anderen Ausführungsform könnten die Mündung der Druckleitung 20 und der Übergang zum Auslassstutzen auch eng beieinander liegen und durch eine Trennwand getrennt sein.In another embodiment, the mouth of the
In der Höhe kann der Kühlmantel 42 so dimensioniert werden, dass gezielt die Wicklungspakete des Stators 36 gekühlt werden.The height of the
Wie
Die Umfangswand der Pumpenkammer 14 wird in diesem Beispiel durch drei übereinander gestapelte und gegeneinander abgedichtete Ringmodule 48 gebildet, die jeweils eines der Laufräder 18 aufnehmen. Die Ansaugöffnung 12 ist in einem separaten Gehäuseteil gebildet, das durch Zugbolzen 50 mit dem Rest des Gehäuses verbunden ist. Auf diese Weise lassen sich die Ringmodule dicht und sicher miteinander verspannen. Nach dem Lösen der Zugbolzen 50 und Entfernen des separaten Gehäuseteils kann die Anzahl der Ringmodule 48 und der Laufräder 18 nach Bedarf bzw. nach verfügbarer Bauhöhe variiert werden.In this example, the peripheral wall of the
Die in
Unmittelbar unterhalb des Befestigungsflansches 52 hat der Gehäuseteil 58 eine kreisförmige Außenkontur, die auf die Achse der Welle 16 zentriert ist. Das Gehäuse 10 lässt sich somit einfach in eine kreisförmige Einbauöffnung des Deckels 54 einsetzen und so an dem Deckel fixieren, dass die Einbauöffnung dicht verschlossen wird.Immediately below the mounting
In den Zwischenräumen zwischen den Ansätzen 60 weist der Befestigungsflansch 52 Schraubenlöcher 64 für nicht gezeigte Befestigungsschrauben auf, mit denen das Gehäuse 10 auf dem Deckel 54 befestigt wird.In the spaces between the
Die Flüssigkeitspumpe 110 gemäß
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202020104824.4U DE202020104824U1 (en) | 2020-08-20 | 2020-08-20 | Medium-cooled liquid pump |
Publications (1)
Publication Number | Publication Date |
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EP3957862A1 true EP3957862A1 (en) | 2022-02-23 |
Family
ID=77207078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21189567.7A Pending EP3957862A1 (en) | 2020-08-20 | 2021-08-04 | Pump system with medium-cooled fluid pump |
Country Status (2)
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EP (1) | EP3957862A1 (en) |
DE (1) | DE202020104824U1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117738939B (en) * | 2024-02-20 | 2024-05-03 | 毅飞泵业(福州)有限公司 | Single-stage end suction centrifugal pump capable of reducing efficiency loss |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1275362B (en) * | 1963-02-08 | 1968-08-14 | Irving Callender Jennings | Pump arrangement |
US3748066A (en) * | 1971-12-13 | 1973-07-24 | Paddle Pumps Inc | Submersible pump |
JPS5397402U (en) * | 1976-12-15 | 1978-08-08 | ||
US4747757A (en) * | 1986-11-26 | 1988-05-31 | Haentjens Walter D | Submersible mixing pump |
EP1178212A2 (en) * | 2000-08-03 | 2002-02-06 | Claber S.P.A. | Water cooled centrifugal pump |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4239071C2 (en) | 1992-11-20 | 1997-01-30 | Grundfos As | Submersible pump unit |
JPH11241698A (en) | 1998-02-24 | 1999-09-07 | Smc Corp | Dip type pump |
PL224743B1 (en) | 2012-06-14 | 2017-01-31 | Hydro Vacuum Spółka Akcyjna | Electric motor for pumps with a closed liquid cooling system |
DE102014113412B3 (en) | 2014-09-17 | 2015-09-24 | Nidec Gpm Gmbh | Flow-cooled coolant pump with wet rotor |
-
2020
- 2020-08-20 DE DE202020104824.4U patent/DE202020104824U1/en active Active
-
2021
- 2021-08-04 EP EP21189567.7A patent/EP3957862A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1275362B (en) * | 1963-02-08 | 1968-08-14 | Irving Callender Jennings | Pump arrangement |
US3748066A (en) * | 1971-12-13 | 1973-07-24 | Paddle Pumps Inc | Submersible pump |
JPS5397402U (en) * | 1976-12-15 | 1978-08-08 | ||
US4747757A (en) * | 1986-11-26 | 1988-05-31 | Haentjens Walter D | Submersible mixing pump |
EP1178212A2 (en) * | 2000-08-03 | 2002-02-06 | Claber S.P.A. | Water cooled centrifugal pump |
Also Published As
Publication number | Publication date |
---|---|
DE202020104824U1 (en) | 2021-11-26 |
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