EP1293678A2 - Pump impeller with valve function - Google Patents
Pump impeller with valve function Download PDFInfo
- Publication number
- EP1293678A2 EP1293678A2 EP02013218A EP02013218A EP1293678A2 EP 1293678 A2 EP1293678 A2 EP 1293678A2 EP 02013218 A EP02013218 A EP 02013218A EP 02013218 A EP02013218 A EP 02013218A EP 1293678 A2 EP1293678 A2 EP 1293678A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- pump
- pump according
- valve
- receptacle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0027—Varying behaviour or the very pump
- F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/042—Axially shiftable rotors
-
- 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
- F04D29/14—Shaft sealings operative only when pump is inoperative
- F04D29/146—Shaft sealings operative only when pump is inoperative especially adapted for liquid pumps
Definitions
- the present invention relates to a centrifugal pump with a on a shaft held impeller, which has a central suction mouth as an inlet opening, whereby the medium that has entered through the suction mouth over a Leaving in particular arranged in the peripheral surface and wherein the impeller from a pump housing forming the impeller chamber is surrounded.
- Centrifugal pumps with such impellers are well known. It is also the problem is known that with such centrifugal pumps at a standstill a certain Leakage current can flow through the impeller. Centrifugal pumps can therefore In contrast to gear pumps, for example, no valve function within Realize pipeline networks. To the line around a centrifugal pump shutting off requires additional and costly valves. Normally However, the disadvantage of the leakage current does not weigh particularly heavily, since it only occurs with pressure differences, is also relatively small and therefore only has a minor impact on the overall system. Has a particularly disadvantageous effect the leakage current in the case of "decentralized" in the heating circuit of a building arranged pumps, which are arranged in the vicinity of a radiator and only this or sometimes the neighboring ones in the same room Supply the existing radiator with medium.
- the leakage flow is due to the natural Convection supports that alone, as known from a central heating system Distribution of hot heating water even without the use of a pump can effect. Convection therefore pushes the hot water through the impeller the decentralized heating pump without it being able to stop the flow.
- the leakage flow causes an undesired heating up of the radiator and thus a reduction in living comfort and above all an unnecessary loss of energy.
- Such a leak flow can also be caused by one pump operating in the system another switched off pump overflows. Such a leak flow can not only in Pump direction but also against the pump direction.
- the object of the present invention is therefore to provide an inexpensive to create a centrifugal pump of the type mentioned, which is more compact Construction and good hydraulic properties an easy way to Shuts off a leakage flow occurring through the impeller.
- the basic idea of the invention is that one of the Openings of the impeller with a cover arranged in the pump housing blocked and thus a leakage current is stopped. Either one of the Openings are closed immediately, or the stream is in immediate Blocked near the impeller inside the impeller chamber.
- the pump works thus as a valve that blocks in both directions, taking it through suitable constructive measures is also possible to block in only one direction the nature of a check valve.
- For sealing the leakage flow can either the inlet opening and / or the outlet openings of the Impeller can be closed directly or indirectly with the valve member. So can cylindrical impellers with their radially arranged outlet openings, frustoconical impellers with correspondingly arranged at an angle Outlet openings and also propellers are sealed. In any case, the Leakage flow effectively interrupted in a simple manner. There are different ones Possible ways of realizing the valve function.
- a flat valve disc of be pressed inside or, if necessary, from the outside onto the suction mouth.
- the valve member and / or the valve seat is not a separate actuator within of the pump housing but is integrated in the inner wall.
- the pump housing and the impeller against each other in axial Are displaceable and the valve member is one of the openings after the Shift closes or blocks the river. So it is possible the number components and a high degree of reliability with a compact design to reach the pump.
- Part of the inner wall can also be from one Hydraulic insert be formed, the one hand the inlet opening and the other the end wall of the pump housing surrounding the suction mouth.
- a structurally particularly simple and therefore advantageous solution lies in the Inner wall of the pump housing with a cylindrical receptacle provided, into which the impeller can be inserted and with the edge of the impeller offers a stop.
- a cylindrical receptacle provided, into which the impeller can be inserted and with the edge of the impeller offers a stop.
- one Sealing in the axial direction instead.
- the promotional part of the impeller is thereby deactivated in a way.
- Such an axial seal which the closes radial openings indirectly, is also in contrast to one possible radial immediate sealing is advantageous because the movement of the Impeller is not hindered.
- the impeller lifts in its disengaged position simply off the sealing surface and can rotate freely.
- the impeller has the function of a valve member, in particular of a valve cone that is against a valve seat formed by the pump housing is pressed.
- the seat and the valve member need not necessarily be have a radially arranged sealing surface, also other arrangements of Sealing surfaces, e.g. conical, are conceivable. It is also possible to choose between Sealing surfaces to provide sealing profiles.
- the impeller and / or the sealing surface serving stop can be made of a sealing plastic.
- the impeller is slidably mounted on the shaft and with an axial displacement into the receptacle arranged on the end face of the impeller can be indented.
- the displacement of the impeller can be different Way done. So the impeller or the shaft or the rotor with impeller or the whole motor by means of electrical, magnetic, mechanical or thermal forces can also be shifted.
- the valve function can be controlled by changing the direction of rotation. If the direction of rotation of the impeller is correct, the impeller would be in the disengaged and in the "wrong" direction of rotation in the engaged position to be brought.
- the motor power would use the impeller of its inertia in the valve seat when the shaft accelerates so strongly is that the impeller cannot follow. In the closed position it will Valve advantageously locked to secure the position.
- a This could be the thread on the shaft to realize the displacement Slope in the area of the end position can be designed self-locking.
- the impeller is engaged by a short reverse run or on other type is effected, so it is definitely preferable if the impeller automatically when the rotation stops, i.e. without handling by a Operator engages in the receptacle.
- Such an automatic engagement can in the case of a short reverse run by running a program in the engine control. However, it can also be done simply by force a relaxing spring caused by the pump running a magnetic force or a hydraulically generated mechanical force is applied. Such a magnetic force could, for example, by current-carrying windings of the electric motor are generated. Once the If the engine stops, the field collapses and the spring could relax.
- FIG. 1 shows a special design of a centrifugal pump. Acting it is a pump that is decentralized, i.e. in the immediate vicinity of a Radiator is arranged.
- the special design allows the pump by means of a thread 1 in the connecting flange of a thermostatic valve can be screwed in.
- To the hydraulic conditions in one to meet such a connection flange are not only the inlet with its Inlet line 2, but also the outlet 3 in the axial direction.
- the Sealing between the pump and the connector is done by means of an O-ring held in a groove 7.
- the pump itself has a drive on its electrical side Electric motor 4 and on the hydraulic side a held on the shaft 5 Impeller 6, which has a central suction mouth 20 as an inlet opening.
- the Impeller 6 is surrounded by a pump or impeller housing 8, which in this Case has a pear shape and as an adapter for connection to the Connection piece of the thermostatic valve is formed.
- the adapter 8 is over a bayonet lock 9 connected to the motor 4 and by means of an O-ring 10 sealed.
- In the impeller chamber 19 there is a hydraulic insert 11 arranged, the outlet 2 with its hydrodynamically designed surface shapes and defines the geometry of the impeller chamber.
- guide structures 17 are arranged, which hold the hydraulic insert 11 and the swirl of the outflowing water brake.
- the impeller 6 is displaceable (double arrow A) on the shaft 5 stored and can in a cylindrical formed by the hydraulic insert 11 Recording 12 can be indented.
- the engaged state is shown in Figure 2. It can be clearly seen that the flow through the impeller 6 in the disengaged Condition ( Figure 1) is not disabled. The centrifugal pump works in this state in a known manner. If the motor runs backwards briefly, the impeller moves 6 in the receptacle 12 such that the cylindrical edge 13 of the impeller the sealing surface 18 of the hydraulic insert 11 comes to rest. Thus the Outlet openings 14 closed and any leakage flow sealed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Kreiselpumpe mit einem auf einer Welle gehaltenen Laufrad, das einen zentralen Saugmund als Eintrittsöffnung aufweist, wobei das über den Saugmund eingetretene Medium das Laufrad über eine insbesondere in der Umfangsfläche angeordnete Austrittsöffnung verläßt und wobei das Laufrad von einem die Laufradkammer bildenden Pumpengehäuse umgeben ist.The present invention relates to a centrifugal pump with a on a shaft held impeller, which has a central suction mouth as an inlet opening, whereby the medium that has entered through the suction mouth over a Leaving in particular arranged in the peripheral surface and wherein the impeller from a pump housing forming the impeller chamber is surrounded.
Kreiselpumpen mit derartigen Laufrädern sind hinlänglich bekannt. Dabei ist auch das Problem bekannt, daß bei solchen Kreiselpumpen im Stillstand ein gewisser Leckstrom durch das Laufrad fließen kann. Kreiselpumpen können daher im Gegensatz beispielsweise zu Zahnradpumpen keine Ventilfunktion innerhalb von Leitungsnetzen realisieren. Um die Leitung in der Umgebung einer Kreiselpumpe abzusperren bedarf es zusätzlicher und kostenaufwendiger Ventile. Im Normalfall wiegt der Nachteil des Leckstromes jedoch nicht sonderlich schwer, da dieser nur bei Druckunterschieden auftritt, zudem verhältnismäßig klein ist und daher nur einen geringen Einfluß auf das Gesamtsystem hat. Besonders nachteilig wirkt sich der Leckstrom jedoch im Falle "dezentral" im Heizkreislauf eines Gebäudes angeordneter Pumpen aus, die in der Nähe eines Heizkörpers angeordnet sind und nur diesen oder mitunter noch den benachbarten in demselben Raum befindlichen Heizkörper mit Medium versorgen. Centrifugal pumps with such impellers are well known. It is also the problem is known that with such centrifugal pumps at a standstill a certain Leakage current can flow through the impeller. Centrifugal pumps can therefore In contrast to gear pumps, for example, no valve function within Realize pipeline networks. To the line around a centrifugal pump shutting off requires additional and costly valves. Normally However, the disadvantage of the leakage current does not weigh particularly heavily, since it only occurs with pressure differences, is also relatively small and therefore only has a minor impact on the overall system. Has a particularly disadvantageous effect the leakage current in the case of "decentralized" in the heating circuit of a building arranged pumps, which are arranged in the vicinity of a radiator and only this or sometimes the neighboring ones in the same room Supply the existing radiator with medium.
Insbesondere bei dieser Art von Pumpen wird der Leckfluß durch die natürliche Konvektion unterstützt, die allein, wie von einer Zentralheizung bekannt, eine Verteilung von heißem Heizungswasser auch ohne den Einsatz einer Pumpe bewirken kann. Die Konvektion drückt daher das heiße Wasser durch das Laufrad der dezentralen Heizungspumpe, ohne daß diese den Fluß stoppen könnte. Im Falle derartiger Heizungssysteme bewirkt der Leckfluß ein ungewolltes Aufheizen des Heizkörpers und damit eine Minderung des Wohnkomforts und vor allem einen unnötigen Energieverlust. Ein solcher Leckfluß kann außerdem auch dadurch hervorgerufen sein, daß eine im System arbeitende Pumpe eine andere abgeschaltete Pumpe überströmt. Ein solcher Leckfluß kann dabei nicht nur in Pumprichtung sondern auch gegen die Pumprichtung erfolgen.In particular with this type of pump, the leakage flow is due to the natural Convection supports that alone, as known from a central heating system Distribution of hot heating water even without the use of a pump can effect. Convection therefore pushes the hot water through the impeller the decentralized heating pump without it being able to stop the flow. in the In the case of such heating systems, the leakage flow causes an undesired heating up of the radiator and thus a reduction in living comfort and above all an unnecessary loss of energy. Such a leak flow can also be caused by one pump operating in the system another switched off pump overflows. Such a leak flow can not only in Pump direction but also against the pump direction.
Aufgabe der vorliegenden Erfindung ist es daher, eine kostengünstig zu realisierende Kreiselpumpe der genannten Art zu schaffen, die bei kompakter Konstruktion und guten hydraulischen Eigenschaften eine einfache Möglichkeit zur Absperrung eines durch das Laufrad auftretenden Leckflusses bietet.The object of the present invention is therefore to provide an inexpensive to create a centrifugal pump of the type mentioned, which is more compact Construction and good hydraulic properties an easy way to Shuts off a leakage flow occurring through the impeller.
Diese Aufgabe wird durch eine Kreiselpumpe nach Anspruch 1 gelöst.This object is achieved by a centrifugal pump according to claim 1.
Der grundlegende Gedanke der Erfindung ist darin zu sehen, daß eine der Öffnungen des Laufrades mit einer im Pumpengehäuse angeordneten Abdeckung blockiert und damit ein Leckstrom gestoppt wird. Dazu kann entweder eine der Öffnungen unmittelbar verschlossen werden, oder der Strom wird in unmittelbarer Nähe des Laufrades innerhalb der Laufradkammer blockiert. Die Pumpe wirkt damit als Ventil, das in beide Richtungen sperrt, wobei es durch geeignete konstruktive Maßnahmen auch möglich ist, eine Sperrung in nur eine Richtung in der Art eines Rückschlagventiles zu bewirken. Zur Abdichtung des Leckflusses kann dabei entweder die Eintrittsöffnung und/oder die Austrittsöffnungen des Laufrades mit dem Ventilglied mittelbar oder unmittelbar verschließbar sein. So können zylindrische Laufräder mit ihren radial angeordneten Austrittsöffnungen, kegelstumpfförmige Laufräder mit entsprechend im Winkel angeordneten Austrittsöffnungen und auch Propeller abgedichtet werden. Auf jeden Fall wird der Leckfluß auf einfache Weise effektiv unterbrochen. Dabei sind unterschiedliche Möglichkeiten der Realisierung der Ventilfunktion denkbar. The basic idea of the invention is that one of the Openings of the impeller with a cover arranged in the pump housing blocked and thus a leakage current is stopped. Either one of the Openings are closed immediately, or the stream is in immediate Blocked near the impeller inside the impeller chamber. The pump works thus as a valve that blocks in both directions, taking it through suitable constructive measures is also possible to block in only one direction the nature of a check valve. For sealing the leakage flow can either the inlet opening and / or the outlet openings of the Impeller can be closed directly or indirectly with the valve member. So can cylindrical impellers with their radially arranged outlet openings, frustoconical impellers with correspondingly arranged at an angle Outlet openings and also propellers are sealed. In any case, the Leakage flow effectively interrupted in a simple manner. There are different ones Possible ways of realizing the valve function.
So könnte in einer besonderen Ausführungsform eine plane Ventilscheibe von innen oder gegebenenfalls von außen auf den Saugmund gedrückt werden. Auf jedem Fall ist es wegen der konstruktiv einfachen Umsetzung zu bevorzugen, wenn das Ventilglied und/oder der Ventilsitz kein separates Stellorgan innerhalb des Pumpengehäuses ausbildet sondern in dessen Innenwandung integriert ist. Um die Ventilfunktion mit Laufrad und Pumpengehäuse zu realisieren, ist es vorteilhaft, wenn das Pumpengehäuse und das Laufrad gegeneinander in axialer Richtung verschieblich sind und das Ventilglied eine der Öffnungen nach der Verschiebung verschließt respektive den Fluß blockiert. So ist es möglich die Zahl der Bauteile zu reduzieren und eine hohe Zuverlässigkeit bei kompakter Bauweise der Pumpe zu erreichen. Dabei kann ein Teil der Innenwandung auch von einem Hydraulikeinsatz gebildet sein, der einerseits die Einlaßöffnung und andererseits die den Saugmund umgebende Stirnwand des Pumpengehäuses bildet.In a special embodiment, a flat valve disc of be pressed inside or, if necessary, from the outside onto the suction mouth. On In any case, it is preferable because of the simple design, if the valve member and / or the valve seat is not a separate actuator within of the pump housing but is integrated in the inner wall. To implement the valve function with impeller and pump housing, it is advantageous if the pump housing and the impeller against each other in axial Are displaceable and the valve member is one of the openings after the Shift closes or blocks the river. So it is possible the number components and a high degree of reliability with a compact design to reach the pump. Part of the inner wall can also be from one Hydraulic insert be formed, the one hand the inlet opening and the other the end wall of the pump housing surrounding the suction mouth.
Eine konstruktiv besonders einfache und damit vorteilhafte Lösung liegt darin, die Innenwandung des Pumpengehäuses mit einer zylindrischen Aufnahme zu versehen, in die das Laufrad einschiebbar ist und die mit ihrem Rand dem Laufrad einen Anschlag bietet. Gegen diesen Anschlag, der von einem hinter den Flügeln angeordnetem zylindrischen Rand des Laufrades beaufschlagt wird, findet eine Abdichtung in axialer Richtung statt. Der fördernde Teil des Laufrades wird dadurch in gewisser Weise deaktviert. Eine solche axiale Abdichtung, welche die radialen Öffnungen indirekt verschließt, ist im Gegensatz zu einer ebenfalls möglichen radialen unmittelbaren Abdichtung von Vorteil, da die Bewegung des Laufrades nicht behindert wird. Das Laufrad hebt in seiner ausgerückten Stellung einfach von der Dichtfläche ab und kann frei rotieren.A structurally particularly simple and therefore advantageous solution lies in the Inner wall of the pump housing with a cylindrical receptacle provided, into which the impeller can be inserted and with the edge of the impeller offers a stop. Against this attack, from one behind the wings arranged cylindrical edge of the impeller is applied, one Sealing in the axial direction instead. The promotional part of the impeller is thereby deactivated in a way. Such an axial seal, which the closes radial openings indirectly, is also in contrast to one possible radial immediate sealing is advantageous because the movement of the Impeller is not hindered. The impeller lifts in its disengaged position simply off the sealing surface and can rotate freely.
In diesem Fall hat das Laufrad die Funktion eines Ventilgliedes, insbesondere eines Ventilkegels, der gegen einen vom Pumpengehäuse gebildeten Ventilsitz gedrückt wird. Dabei muß müssen der Sitz und das Ventilglied nicht unbedingt eine radial angeordnete Dichtfläche aufweisen, auch andere Anordnungen von Dichtflächen, z.B. kegelförmige, sind denkbar. Es ist auch möglich, zwischen den Dichtflächen Dichtprofile vorzusehen. Das Laufrad und/oder der als Dichtfläche dienende Anschlag können aus einem dichtendem Kunststoff gefertigt sein. In this case, the impeller has the function of a valve member, in particular of a valve cone that is against a valve seat formed by the pump housing is pressed. The seat and the valve member need not necessarily be have a radially arranged sealing surface, also other arrangements of Sealing surfaces, e.g. conical, are conceivable. It is also possible to choose between Sealing surfaces to provide sealing profiles. The impeller and / or the sealing surface serving stop can be made of a sealing plastic.
Gerade beim Einsatz einer solchen dichtenden zylindrischen Aufnahme ist es zu bevorzugen, wenn das Laufrad verschieblich auf der Welle angeordnet ist und mit einer axialen Verschiebung in die stirnseitig vom Laufrad angeordnete Aufnahme einrückt werden kann. Die Verschiebung des Laufrades kann auf unterschiedliche Weise geschehen. So kann das Laufrad oder die Welle bzw. der Rotor mit Laufrad oder auch der ganze Motor mittels elektrischer, magnetischer, mechanischer oder auch thermischer Kräfte verschoben werden. Besonders vorteilhaft ist es jedoch, wenn die Ventilfunktion durch Änderung der Drehrichtung gesteuert werden kann. Bei "richtiger" also fördernder Drehrichtung des Laufrades würde das Laufrad in die ausgerückte und bei "falscher" Drehrichtung in die eingerückte Position gebracht werden. Die Motorkraft würde das Laufrad insofern unter Ausnutzung von dessen Trägheit in den Ventilsitz drücken, als die Welle so stark beschleunigt wird, daß das Laufrad nicht folgen kann. In der geschlossenen Position wird das Ventil vorteilhafterweise verriegelt, um die Position zu sichern. Beim Einsatz eines Gewindes auf der Welle zur Realisierung der Verschiebung könnte dazu die Steigung im Bereich der Endstellung selbsthemmend gestaltet werden.Especially when using such a sealing cylindrical receptacle, it is too prefer when the impeller is slidably mounted on the shaft and with an axial displacement into the receptacle arranged on the end face of the impeller can be indented. The displacement of the impeller can be different Way done. So the impeller or the shaft or the rotor with impeller or the whole motor by means of electrical, magnetic, mechanical or thermal forces can also be shifted. However, it is particularly advantageous if the valve function can be controlled by changing the direction of rotation. If the direction of rotation of the impeller is correct, the impeller would be in the disengaged and in the "wrong" direction of rotation in the engaged position to be brought. The motor power would use the impeller of its inertia in the valve seat when the shaft accelerates so strongly is that the impeller cannot follow. In the closed position it will Valve advantageously locked to secure the position. When using a This could be the thread on the shaft to realize the displacement Slope in the area of the end position can be designed self-locking.
Ob das Einrücken des Laufrades durch einen kurzzeitigen Rückwärtslauf oder auf andere Art bewirkt wird, so ist es auf jeden Fall zu bevorzugen, wenn das Laufrad bei einem Aussetzen der Drehung selbsttätig, also ohne Handhabung durch eine Bedienperson, in die Aufnahme einrückt. Ein solches selbsttätiges Einrücken kann im Falle des kurzzeitigen Rückwärtslaufes durch den Ablauf eines Programmes in der Motorsteuerung realisiert sein. Es kann jedoch auch einfach durch die Kraft einer sich entspannenden Feder bewirkt werden, die bei laufender Pumpe durch eine magnetische Kraft oder durch eine hydraulisch erzeugte mechanische Kraft beaufschlagt wird. Eine solche magnetische Kraft könnte beispielsweise durch die stromdurchflossenen Wicklungen des Elektromotors erzeugt sein. Sobald der Motor aussetzt, bricht das Feld zusammen und die Feder könnte sich entspannen.Whether the impeller is engaged by a short reverse run or on other type is effected, so it is definitely preferable if the impeller automatically when the rotation stops, i.e. without handling by a Operator engages in the receptacle. Such an automatic engagement can in the case of a short reverse run by running a program in the engine control. However, it can also be done simply by force a relaxing spring caused by the pump running a magnetic force or a hydraulically generated mechanical force is applied. Such a magnetic force could, for example, by current-carrying windings of the electric motor are generated. Once the If the engine stops, the field collapses and the spring could relax.
Eine besondere Ausführungsform der erfindungsgemäßen Pumpe wird nachfolgend anhand der Figuren 1 bis 3 näher beschrieben. Es zeigen:
- Figur 1
- eine "offene" Pumpe,
-
Figur 2 - eine "geschlossene" Pumpe und
-
Figur 3 - ein eingerücktes Laufrad im Detail.
- Figure 1
- an "open" pump,
- Figure 2
- a "closed" pump and
- Figure 3
- an indented impeller in detail.
In Figur 1 ist eine besondere Bauform einer Kreiselpumpe gezeigt. Dabei handelt
es sich um eine Pumpe, die dezentral, also in unmittelbarer Nähe eines
Heizkörpers, angeordnet wird. Die besondere Bauform läßt es zu, daß die Pumpe
vermittels eines Gewindes 1 in den Anschlußflansch eines Thermostatventils
eingeschraubt werden kann. Um den hydraulischen Gegebenheiten in einem
solchen Anschlußflansch zu genügen, sind nicht nur der Einlaß mit seiner
Zulaufleitung 2, sondern auch der Auslaß 3 in axialer Richtung angelegt. Die
Abdichtung zwischen der Pumpe und dem Anschlußstutzen geschieht vermittels
eines in einer Nut 7 gehaltenen O-Ringes.1 shows a special design of a centrifugal pump. Acting
it is a pump that is decentralized, i.e. in the immediate vicinity of a
Radiator is arranged. The special design allows the pump
by means of a thread 1 in the connecting flange of a thermostatic valve
can be screwed in. To the hydraulic conditions in one
to meet such a connection flange are not only the inlet with its
Die Pumpe selber weist auf ihrer elektrischen Seite einen antreibenden
Elektromotor 4 und auf der hydraulischen Seite ein auf der Welle 5 gehaltenes
Laufrad 6 auf, das einen zentralen Saugmund 20 als Eintrittsöffnung hat. Das
Laufrad 6 ist umgeben von einem Pumpen- oder Laufradgehäuse 8, das in diesem
Fall eine Birnenform aufweist und als Adapter für den Anschluß an den
Anschlußstutzen des Thermostatventils ausgebildet ist. Der Adapter 8 ist über
einen Bajonettverschluß 9 mit dem Motor 4 verbunden und vermittels eines O-Ringes
10 abgedichtet. In der Laufradkammer 19 ist ein Hydraulieinsatz 11
angeordnet, der mit seiner hydrodynamisch gestalteten Oberfläche den Auslaß 2
formt und die Geometrie der Laufradkammer festlegt. Zwischen Hydraulieinsatz 11
und der Innenwandung des Laufradgehäuses 8 sind Leitstrukturen 17 angeordnet,
die den Hydraulikeinsatz 11 halten und den Drall des ausströmenden Wassers
bremsen.The pump itself has a drive on its electrical side
Erfindungsgemäß ist das Laufrad 6 verschieblich (Doppelpfeil A) auf der Welle 5
gelagert und kann in eine von dem Hydraulieinsatz 11 gebildete zylindrische
Aufnahme 12 eingerückt werden. Der eingerückte Zustand ist in Figur 2 gezeigt.
Deutlich zu erkennen ist, daß der Durchfluß durch das Laufrad 6 im ausgerückten
Zustand (Figur 1) nicht behindert ist. Die Kreiselpumpe arbeitet in diesem Zustand
in bekannter Weise. Läuft nun der Motor kurzzeitig rückwärts, so rückt das Laufrad
6 in die Aufnahme 12 derart ein, daß der zylindrische Rand 13 des Laufrades auf
der Dichtfläche 18 des Hydraulieinsatzes 11 zu liegen kommt. Somit werden die
Austrittsöffnungen 14 verschlossen und ein jeglicher Leckfluß abgedichtet.According to the invention, the
Das Verschieben des Laufrades 6 auf der Welle 5 geschieht in diesem
Ausführungsbeispiel dadurch, daß das Laufrad 6 vermittels eines Innengewindes
auf einem auf dem Wellenkopf befindlichen Außengewinde 15 drehbeweglich
aufsitzt (Figur 3). Bei fördernder Vorwärtsdrehung rückt es wegen seiner Trägheit
in einer Schraubenbewegung aus der Aufnahme aus und entsprechend bei einer
kurzzeitigen Rückwärtsdrehung ein (Doppelpfeil A). Im eingerückten Zustand wird
das Laufrad verriegelt.The displacement of the
Claims (12)
dadurch gekennzeichnet, daß
ein bei stehendem Laufrad (6) auftretender Leckfluß vermittels eines innerhalb des Pumpengehäuses (8) angeordneten Ventiles insbesondere durch eine axiale Verschieblichkeit des Laufrades blockierbar ist.Centrifugal pump with an impeller held on a shaft, which has a central suction mouth as an inlet opening, the medium which has entered via the suction mouth leaves the impeller via at least one outlet opening and the impeller is surrounded by a pump housing forming the impeller chamber,
characterized in that
a leakage flow occurring when the impeller (6) is stationary can be blocked by means of a valve arranged inside the pump housing (8), in particular by means of an axial displacement of the impeller.
dadurch gekennzeichnet, daß zur Abdichtung des Leckflusses die Eintrittsöffnung (20) und/oder die Austrittsöffnung(en) (14) des Laufrades (6) durch das Ventil blockierbar ist (sind).Pump according to claim 1,
characterized in that the inlet opening (20) and / or the outlet opening (s) (14) of the impeller (6) can be blocked by the valve to seal the leakage flow.
dadurch gekennzeichnet, daß eine Innenwandung des Pumpengehäuses (8) ein Ventilglied oder einen Ventilsitz ausbildet.Pump according to claim 1 or 2,
characterized in that an inner wall of the pump housing (8) forms a valve member or a valve seat.
dadurch gekennzeichnet, daß das Pumpengehäuse (8) und/oder das Laufrad (6) gegeneinander in axialer Richtung verschieblich sind.Pump according to one of the preceding claims,
characterized in that the pump housing (8) and / or the impeller (6) are mutually displaceable in the axial direction.
dadurch gekennzeichnet, daß die Innenwandung eine zylindrische Aufnahme (12) aufweist, in die das Laufrad (6) in axialer Bewegung einrückt, wobei das Laufrad (6) als Ventilglied mit einem Rand (13) mittelbar oder unmittelbar gegen eine von der Aufnahme (12) gebildete Dichtfläche (18) anliegt. Pump according to claim 4,
characterized in that the inner wall has a cylindrical receptacle (12) into which the impeller (6) engages in axial movement, the impeller (6) as a valve member with an edge (13) indirectly or directly against one of the receptacle (12 ) formed sealing surface (18).
dadurch gekennzeichnet, daßdasLaufrad(6)beieinem Aussetzen der Drehung selbsttätig in die Aufnahme (12) einrückt.Pump according to one of the preceding claims,
characterized in that the impeller (6) automatically engages the receptacle (12) when the rotation stops.
dadurch gekennzeichnet, daß das Laufrad (6) mit einem Innengewinde auf einem auf dem Wellenkopf befindlichen Außengewinde (15) drehbeweglich aufsitzt und in Schraubenbewegung bei förderndem Vorwärtsdrehung aus der Aufnahme (12) ausrückt.Pump according to one of the preceding claims,
characterized in that the impeller (6) is rotatably seated with an internal thread on an external thread (15) located on the shaft head and disengages from the receptacle (12) in a screw movement with a forward rotation.
dadurch gekennzeichnet, daß das Laufrad (6) bei einer kurzzeitigen Rückwärtsdrehung in die Aufnahme (12) einrückt.Pump according to one of the preceding claims,
characterized in that the impeller (6) engages in the receptacle (12) during a brief reverse rotation.
dadurch gekennzeichnet, daß die axiale Verschiebung des Laufrades (6) durch magnetische Kräfte veranlaßt wird, wobei die magnetischen Felder insbesondere durch die stromdurchflossenen Wicklungen des Elektromotors (4) erzeugt sind.Pump according to one of the preceding claims,
characterized in that the axial displacement of the impeller (6) is caused by magnetic forces, the magnetic fields being generated in particular by the windings of the electric motor (4) through which current flows.
dadurch gekennzeichnet, daß das Laufrad (6) im eingerückten Zustand verriegelbar ist.Pump according to one of the preceding claims,
characterized in that the impeller (6) can be locked in the engaged state.
dadurch gekennzeichnet, daß das Laufrad (6) auf oder an seiner Welle axial verschieblich ist.Pump according to one of the preceding claims,
characterized in that the impeller (6) is axially displaceable on or on its shaft.
gekennzeichnet durch
ein auf der hydraulischen Seite befindliches Verschlußmittel, insbesondere ein Innengewinde, mit dem die Pumpe derart an einem eine Zulaufleitung und eine Ablaufleitung aufweisenden Ventilgehäuse anbringbar ist, daß der Saugmund die Zulaufleitung umgibt und das Laufrad die Funktion des die Zulaufleitung abdichtenden Ventilgliedes einnimmt.Pump according to one of the preceding claims for installation on a radiator or in the immediate vicinity of a radiator in its forward or return flow,
marked by
a closure means located on the hydraulic side, in particular an internal thread, with which the pump can be attached to a valve housing having an inlet line and an outlet line such that the suction mouth surrounds the inlet line and the impeller takes on the function of the valve member sealing the inlet line.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10145411 | 2001-09-14 | ||
| DE2001145411 DE10145411A1 (en) | 2001-09-14 | 2001-09-14 | Impeller with valve function |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1293678A2 true EP1293678A2 (en) | 2003-03-19 |
| EP1293678A3 EP1293678A3 (en) | 2004-01-07 |
| EP1293678B1 EP1293678B1 (en) | 2007-10-10 |
Family
ID=7699078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20020013218 Expired - Lifetime EP1293678B1 (en) | 2001-09-14 | 2002-06-15 | Pump impeller with valve function |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1293678B1 (en) |
| DE (2) | DE10145411A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2870898A1 (en) * | 2004-05-28 | 2005-12-02 | Mark Iv Systemes Moteurs Sa | Variable flow pump device for cooling liquid circulation circuit, has control actuator mounted on or in rotating unit/shaft structure assembly and controlling displacement and positioning in translation of rotating repression unit |
| EP1767788A1 (en) * | 2005-09-23 | 2007-03-28 | Coprecitec, S.L. | Drain pump for home appliances |
| DE102007052082A1 (en) * | 2007-10-31 | 2009-05-07 | BSH Bosch und Siemens Hausgeräte GmbH | Water-conducting household appliance with a pump with valve function |
| EP2228891A2 (en) | 2009-03-10 | 2010-09-15 | Wilo Se | Electric motor for actuating a valve |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006027319B4 (en) * | 2006-06-13 | 2014-05-22 | Wilo Ag | Centrifugal motor pump with rotation-directed start |
| DE102010062752A1 (en) * | 2010-12-09 | 2012-06-14 | Mahle International Gmbh | Cooling agent pump for internal combustion engine, has impeller that is displaceably mounted along axial direction for controlling ejection rate of pump, where annular piston is provided for axial adjustment of impeller |
| EP4390137A1 (en) * | 2022-12-20 | 2024-06-26 | Wilo Se | Method for releasing a blockage of a waste water pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE911352C (en) * | 1943-01-17 | 1954-05-13 | Fritz Schupp | Gyroscope with device for mutual adjustment of the running and guide wheels |
| CH339496A (en) * | 1955-08-03 | 1959-06-30 | Sfindex | Centrifugal pump |
| US3404631A (en) * | 1966-06-09 | 1968-10-08 | Westinghouse Electric Corp | Centrifugal pump |
| FR1563183A (en) * | 1968-02-29 | 1969-04-11 | ||
| DE2510787A1 (en) * | 1975-03-08 | 1976-09-16 | Vaillant Joh Kg | Circulating pump for central heating - has impeller formed to act as shut off valve when pump stops |
| DE2640990A1 (en) * | 1976-09-11 | 1978-03-16 | Klein Schanzlin & Becker Ag | Centrifugal pump with axially compensated impeller - has axially fixed balance ring behind axially free impeller |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19711178A1 (en) * | 1997-03-18 | 1998-09-24 | Wilo Gmbh | Pump in the hot water circuit of a central heating system |
| DE10115989A1 (en) * | 2000-04-04 | 2001-12-13 | Bernhard Stadler | Rotary circulation pump has an axially moveable motor rotor which is automatically positioned to block back circulation when in the quiescent mode |
-
2001
- 2001-09-14 DE DE2001145411 patent/DE10145411A1/en not_active Withdrawn
-
2002
- 2002-06-15 DE DE50211038T patent/DE50211038D1/en not_active Expired - Lifetime
- 2002-06-15 EP EP20020013218 patent/EP1293678B1/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE911352C (en) * | 1943-01-17 | 1954-05-13 | Fritz Schupp | Gyroscope with device for mutual adjustment of the running and guide wheels |
| CH339496A (en) * | 1955-08-03 | 1959-06-30 | Sfindex | Centrifugal pump |
| US3404631A (en) * | 1966-06-09 | 1968-10-08 | Westinghouse Electric Corp | Centrifugal pump |
| FR1563183A (en) * | 1968-02-29 | 1969-04-11 | ||
| DE2510787A1 (en) * | 1975-03-08 | 1976-09-16 | Vaillant Joh Kg | Circulating pump for central heating - has impeller formed to act as shut off valve when pump stops |
| DE2640990A1 (en) * | 1976-09-11 | 1978-03-16 | Klein Schanzlin & Becker Ag | Centrifugal pump with axially compensated impeller - has axially fixed balance ring behind axially free impeller |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2870898A1 (en) * | 2004-05-28 | 2005-12-02 | Mark Iv Systemes Moteurs Sa | Variable flow pump device for cooling liquid circulation circuit, has control actuator mounted on or in rotating unit/shaft structure assembly and controlling displacement and positioning in translation of rotating repression unit |
| EP1767788A1 (en) * | 2005-09-23 | 2007-03-28 | Coprecitec, S.L. | Drain pump for home appliances |
| DE102007052082A1 (en) * | 2007-10-31 | 2009-05-07 | BSH Bosch und Siemens Hausgeräte GmbH | Water-conducting household appliance with a pump with valve function |
| EP2055958A3 (en) * | 2007-10-31 | 2013-02-27 | BSH Bosch und Siemens Hausgeräte GmbH | Water-guiding household device with a pump with a valve function |
| EP2228891A2 (en) | 2009-03-10 | 2010-09-15 | Wilo Se | Electric motor for actuating a valve |
| DE102009011946A1 (en) | 2009-03-10 | 2010-09-16 | Wilo Se | Electric motor for actuating a valve |
| EP2228891A3 (en) * | 2009-03-10 | 2016-09-14 | Wilo Se | Electric motor for actuating a valve |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1293678A3 (en) | 2004-01-07 |
| DE10145411A1 (en) | 2003-04-03 |
| EP1293678B1 (en) | 2007-10-10 |
| DE50211038D1 (en) | 2007-11-29 |
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