EP2495444A2 - Pump - Google Patents
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- Publication number
- EP2495444A2 EP2495444A2 EP12157676A EP12157676A EP2495444A2 EP 2495444 A2 EP2495444 A2 EP 2495444A2 EP 12157676 A EP12157676 A EP 12157676A EP 12157676 A EP12157676 A EP 12157676A EP 2495444 A2 EP2495444 A2 EP 2495444A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- impeller
- strömungsleitschaufel
- support ring
- pump according
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 210000004712 air sac Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000005406 washing 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
- 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
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
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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
- F04D9/00—Priming; Preventing vapour lock
- F04D9/001—Preventing vapour lock
- F04D9/002—Preventing vapour lock by means in the very pump
- F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour
Definitions
- the invention relates to a pump, such as is used in particular in household appliances such as a dishwasher or washing machine, wherein the pump has an impeller for conveying fluid or water.
- a corresponding pump is from the EP 2150165 A2 known, to which expressly referred. It illustrates both in principle and practically very well the basic operation of such a pump or centrifugal pump with impeller.
- the problem with this pump is that in some cases it has been observed that when air is partially drawn in with the fluid or water, air bubbles are rotated in a circle by the impeller. These air bubbles often do not come off the pump or can not always be removed from the pump chamber, forming a kind of swirling circulating hose. Of course, they affect the pumping power very negative.
- the invention has for its object to provide an aforementioned pump, can be avoided with the disadvantages of the prior art and in particular a practical and störunanrize pump can be created.
- the centrifugal pump with the impeller to be pumped fluid or water sucks centrally and in the axial direction and radially flows out or out of the impeller. Then the fluid to be pumped circulates in the pump chamber until it flows out again approximately in the radial direction from the pump chamber and the entire pump.
- the impeller extends with a bottom over a pump bottom, below which is often the drive motor, sitting on the axis of the impeller.
- one or more flow guide vanes are arranged radially outside the impeller and extend helically away from the pump bottom in the direction of rotation of the impeller. At least one flow guide blade extends as far as the underside of the impeller or close to it, advantageously with a maximum of 5 mm spacing, particularly advantageously with a maximum of 3 mm or even only 1 mm.
- a Strömungsleitschaufel or especially exactly downwardly reaching Strömungsleitschaufel can cause circulating fluid and in particular the above-described circulating hose made of water with a variety of air bubbles is tapped virtually at the bottom of the impeller at the bottom of the pump and by the slope in the direction of rotation Impellers away from the pump bottom and to the outlet from the pump is promoted. While the additional flow guide vanes conveying water without air inclusions only slightly affect or improve the performance of the pump, above all the described venting effect is very advantageous and very pronounced. Multiple airfoils may extend downwardly for tapping and conveying out air bladder fluid. In practice, however, it has been found that even a single flow vane shows good effect and may already be sufficient.
- the at least one downwardly drawn Strömungsleitschaufel not only extends to the bottom of the impeller, but even at least until just before the bottom of the pump, advantageously with a maximum distance of 5 mm, more preferably at most 3 mm or even only 1 mm , Under certain circumstances, it can even reach up to the bottom of the pump and rest elastically. Then the mentioned tapping effect is maximal.
- the Strömungsleitschaufeln are advantageous fixed or are fixedly arranged in the pump chamber, while the impeller rotates yes.
- the flow vanes can also be taken out of the pump chamber or can be mounted as a separate part by inserting.
- the at least one flow vane is advantageously provided on a circumferential support ring, which extends substantially radially outside of an upper region of the impeller, in such a way that it does not interfere with the outflow of the fluid to be delivered from the impeller in the radial direction.
- the advantage of such a support ring with flow vane on it is that only a single part must be made and used in the pump chamber and fixed therein. At the said point in the upper part of the impeller, the support ring does not interfere.
- at least one up to the bottom of the impeller or to the pump bottom protruding Strömungsleitschaufel can then protrude in the axial direction on the support ring. Although this means that it must be self-supporting and not attached to the support ring and placed by this. However, this is not a problem due to the correspondingly stable design of the flow guide vane.
- a single flow vane can also be dispensed with the support ring when it runs more than 180 ° around the impeller and can be kept stable position.
- it has a complete revolution around the impeller.
- two or a maximum of three flow vanes are considered sufficient. With more than one flow vane it can handle less than 180 ° around the impeller. Preferably, it is less than 160 °, but more than 90 °. This is especially true for a flow vane that extends to the bottom of the impeller or just before or to the bottom of the pump.
- Another Strömungsleitschaufel which is provided only on the aforementioned support ring, can rotate about 90 ° or slightly less.
- the at least one flow vane in the course of the pump bottom away has an increasingly steeper rising angle. This causes the troublesome hose to be conveyed fluid and circulating water bubbles is removed at a rather shallow angle from the pump bottom and then the entire fluid flow is increasingly directed in the axial direction. Once this has taken place in part, the feeding out can be accelerated or increased by an increasingly steeper angle. It can be provided that in a circulation of a flow vane of about 90 ° around the support ring around its entire axial extent is covered, ie from a lower edge to an upper edge.
- An angle which increases in the direction of rotation of the flow guide vane also has the advantage that the velocity component increases in the axial direction, that is to say also towards the outlet out of the pump. This improves the delivery effect from the pump.
- the impeller is closed on its underside or on its upper side. At the top can be advantageously provided an upper cover.
- the above-described support ring for the at least one flow vane does not cover a lateral radial outlet of the impeller between the upper cover and the underside.
- the impeller is usually hat-like pulled up at its top with the top cover, this area is enough to provide or attach the support ring.
- a pump bottom region can be pulled radially outward of the impeller, ie away from the pump bottom or the motor located underneath, and thereby have an oblique course with increasing radial distance from the impeller.
- the running up to the underside of the impeller Strömungsleitschaufel can then run with a small distance to the sloping pump floor area or even advantageously abut it.
- a free inflow section of the reaching to the bottom of the impeller Strömungsleitschaufel which just reaches down to be tapered or tapered.
- a Tapering or tapering may be approximately uniform and ranging from a maximum width at the base of an abovementioned support ring until just at the tip at the free end of the Anströmabbies near the bottom of the impeller or on the pump floor fitting.
- the projecting beyond the support ring Strömungsleitschaufel that extends to the bottom of the impeller or is applied to the pump floor is formed elastically. This can be with a certain spring load.
- the above-described inflow section is particularly suitable.
- a Strömungsleitschaufel not only to the pump bottom through the support ring for best possible tapping of air bubbles, but also extends in the other axial direction.
- a free-standing discharge section can be provided which, for example, leads the fluid to be conveyed or a mixture of fluid and air bubbles to be conveyed directly to an outlet from the pump chamber.
- it can also be specified how often the fluid to be pumped circulates in the pump chamber before it flows out of the pump.
- the flow guide vane can be designed so that it only halfway to an outer wall of the pump chamber filled by the fluid to be delivered ranges. This can ensure that the desired through the flow vane conveying effect is achieved. If the outer chamber wall is heated, this heating effect is not impaired.
- the at least one flow guide blade extends outside of the impeller. Slightly above it, the flow vane runs on the support ring. So that this does not unnecessarily reduce the pump chamber, it should run as close as possible to an inner wall of the pump chamber or rest against it.
- This inner wall usually consists of a pipe section, on the one hand forms the central axial intake for the fluid to be pumped and therefore runs close to the top of the impeller, then slightly expands and almost inverted outwards and reverses the direction and then back to the pump cover or runs to the pump chamber top. Furthermore, in the event that the pump has said heating on the outside of the pump chamber, its effect remains as unimpaired as possible. The support ring thus disturbs neither the flow of water at the heating nor does it otherwise reduce their effect.
- Fig. 1 is a lateral longitudinal section of a pump 11 according to the invention shown with a pump housing 12 in which a pump chamber 13 with an outer chamber wall 14 is located.
- a pump housing 12 in which a pump chamber 13 with an outer chamber wall 14 is located.
- a pump chamber 13 with an outer chamber wall 14 is located.
- radial pump is for example from the EP 2150165 A2 known.
- a pump bottom is further formed with an inner pump bottom 15a and an outer pump bottom 15b and a central axial tubular inlet 16, which merges into a pump cover 17. This in turn merges into an inner wall which leads to a lateral outlet 18.
- the inlet 16 leads to an over the pump bottom 15 in the usual manner mounted impeller 19. It is as a closed impeller 19 with a lower impeller disk 20, an upper impeller disk 21 and main vanes 23 formed therebetween.
- the impeller 19 extends with its lower impeller disk 20 just above the inner pump bottom 15a and here a gap 24 of a few mm is given. This gap 24 serves to compensate for the axial play of the impeller 19 mounted on a shaft of a pump motor.
- inner pump bottom 15 a and outer pump bottom 15 b a step is arranged, which is almost just outside the lower impeller disc 20. It can be seen that the outer pump bottom 15b approximately simulates the curvature or curvature of the lower impeller disk 20. This serves for improved fluid flow.
- the impeller 19 rotates clockwise in the longitudinal direction as seen from the left and delivers fluid into the pumping chamber 13 radially and with a velocity component in the circumferential direction.
- the chamber wall 14 is formed or heated in a manner not shown as a heating element, so that the flowing along its inner side fluid on the way to the outlet 18 with several revolutions flows along it and is heated. Also this is on the aforementioned EP 2150165 A2 directed.
- a support ring 29 Around the cylindrical portion of the pump cover 17 extends radially outside and at the level of the upper impeller disc 21, a support ring 29. It can be pushed onto the pump cover 17 with press-fit for fixing, alternatively, it may be snapped or glued. He is in the axial direction only slightly to the right on the pump cover 17 via. As compared to the following Fig. 2 to 5 becomes clear, 29 two flow vanes 25a and 25b are arranged or formed on the outside of the support ring. Of the flow guide vane 25a is shown substantially only their projecting portion and the free lower end 26a, which corresponds to the above inflow section.
- the flow vane 25a lies with the projecting region substantially at the outer pump bottom 15b to its free end 26a, which is here half hidden by the lower impeller disc 20.
- the other Strömungsleitschaufel 25b is not in the axial direction on the support ring 29 via, as in Fig. 1 can be seen. It can also be seen that the width of the flow guide vane 25b is approximately half the distance between the support ring 29 and the heated chamber wall 14.
- Fig. 2 is seen in an oblique view, as the flow vanes 25a and 25b are arranged on the outside of the support ring 29 and extend with a recognizable slope. Since the impeller 19 with lower impeller disc 20, upper impeller disc 21 and main vanes 23 therebetween rotates clockwise to the right, as well as in Fig. 4 , the pumped fluid runs in the same direction, especially if the air bubbles mentioned above are in it. Above all, the fluid flow with the air bubbles runs along the outer pump bottom 15b and can be removed there by the adjacent free lower end 26a and lifted off by means of the flow guide vane 25a and conveyed to the outlet 18 of the pump. The flow guide vane 25b also serves to convey away, so that the fluid flow is also conveyed away from the pump bottom 15b in its region.
- the Fig. 5 shows this in side view.
- the impeller 19 is omitted for the sake of clarity.
- the mold is designed such that the flow guide vane 25a rests with the outer edge of the free area on the outer pump bottom 15b.
- the free lower end 26a of the Strömungsschschaufel 25a including the free portion radially only slightly outside of the impeller 19. So can actually the largest part or even the entire circumferential tube of fluid or water with a plurality of air bubbles are tapped therein.
- the aforementioned distance of the Strömungsleitschaufel 25a and the free lower end 26a to the bottom of the impeller 19 is about 3 mm or even slightly less.
- a lower free end 126a is further pulled down, for example, 1 mm to 20 mm or even more, and even an impeller 119 and a lower impeller 120 dominated.
- This can be different than in Fig. 1 trained pump bottoms be beneficial.
- the aforementioned distance of the Strömungsleitschaufel 125 to the bottom of the impeller 119 is a few mm, preferably about 3 mm or even slightly less.
- an upper free end 127 b as the aforementioned Ableitabrough in the other direction can protrude freely over the support ring 129 and then, on the Fig. 1 transferred, a further improved guidance of the fluid flow toward the outlet 18 of the pump 11 causes.
- a protrusion in this direction may be greater or less than the protrusion of the free portion of the other flow vane 125a. However, this essentially depends on the spatial conditions in a pump chamber.
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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
Description
Die Erfindung betrifft eine Pumpe, wie sie insbesondere in Haushaltsgeräten wie Geschirrspüler oder Waschmaschine eingesetzt wird, wobei die Pumpe einen Impeller zur Förderung von Fluid bzw. Wasser aufweist.The invention relates to a pump, such as is used in particular in household appliances such as a dishwasher or washing machine, wherein the pump has an impeller for conveying fluid or water.
Eine entsprechende Pumpe ist aus der
Der Erfindung liegt die Aufgabe zugrunde, eine eingangs genannte Pumpe zu schaffen, mit der Nachteile des Standes der Technik vermieden werden können und insbesondere eine praxistaugliche und störunanfällige Pumpe geschaffen werden kann.The invention has for its object to provide an aforementioned pump, can be avoided with the disadvantages of the prior art and in particular a practical and störunanfällige pump can be created.
Gelöst wird diese Aufgabe durch eine Pumpe mit den Merkmalen des Anspruchs 1. Vorteilhafte sowie bevorzugte Ausgestaltungen der Erfindung sind Gegenstand der weiteren Ansprüche und werden im Folgenden näher erläutert. Der Wortlaut der Ansprüche wird durch ausdrückliche Bezugnahme zum Inhalt der Beschreibung gemacht.This object is achieved by a pump with the features of claim 1. Advantageous and preferred embodiments of the invention are the subject of the further claims and will be hereinafter explained in more detail. The wording of the claims is incorporated herein by express reference.
Es ist vorgesehen, dass die Kreiselpumpe mit dem Impeller zu förderndes Fluid bzw. Wasser zentral und in axialer Richtung ansaugt und radial wieder ausströmt bzw. herausfördert aus dem Impeller. Dann läuft das zu fördernde Fluid in der Pumpenkammer um, bis es wiederum in etwa in radialer Richtung aus der Pumpenkammer und der gesamten Pumpe ausströmt. Der Impeller verläuft dabei mit einer Unterseite über einem Pumpenboden, unter dem sich häufig der Antriebsmotor befindet, auf dessen Achse der Impeller sitzt.It is envisaged that the centrifugal pump with the impeller to be pumped fluid or water sucks centrally and in the axial direction and radially flows out or out of the impeller. Then the fluid to be pumped circulates in the pump chamber until it flows out again approximately in the radial direction from the pump chamber and the entire pump. The impeller extends with a bottom over a pump bottom, below which is often the drive motor, sitting on the axis of the impeller.
Erfindungsgemäß sind radial außerhalb des Impellers eine oder mehrere Strömungsleitschaufeln angeordnet, die schraubenartig verlaufen mit in Drehrichtung des Impellers verlaufender Steigung weg vom Pumpenboden. Mindestens eine Strömungsleitschaufel reicht dabei bis an die Unterseite des Impellers bzw. bis nahe daran, vorteilhaft mit maximal 5 mm Abstand, besonders vorteilhaft mit maximal 3 mm oder sogar nur 1 mm. Eine Strömungsleitschaufel bzw. vor allem genau die nach unten reichende Strömungsleitschaufel kann bewirken, dass umlaufendes Fluid und insbesondere auch der vorbeschriebene umlaufende Schlauch aus Wasser mit einer Vielzahl von Luftblasen darin quasi an der Unterseite des Impellers am Pumpenboden abgegriffen wird und durch die Steigung in Drehrichtung des Impellers weg von dem Pumpenboden und hin zu dem Auslass aus der Pumpe gefördert wird. Während die zusätzlichen Strömungsleitschaufeln das Fördern von Wasser ohne Lufteinschlüsse die Leistung der Pumpe nur geringfügig beeinflussen bzw. verbessern, ist vor allem die beschriebene Entlüftungswirkung sehr vorteilhaft und sehr ausgeprägt. Es können mehrere Strömungsleitschaufeln so weit nach unten reichen zum Abgreifen und Hinausfördern von mit Luftblasen versetztem Fluid. In der Praxis hat sich jedoch herausgestellt, dass bereits eine einzige Strömungsleitschaufel gute Wirkung zeigt und unter Umständen bereits ausreichend ist.According to the invention, one or more flow guide vanes are arranged radially outside the impeller and extend helically away from the pump bottom in the direction of rotation of the impeller. At least one flow guide blade extends as far as the underside of the impeller or close to it, advantageously with a maximum of 5 mm spacing, particularly advantageously with a maximum of 3 mm or even only 1 mm. A Strömungsleitschaufel or especially exactly downwardly reaching Strömungsleitschaufel can cause circulating fluid and in particular the above-described circulating hose made of water with a variety of air bubbles is tapped virtually at the bottom of the impeller at the bottom of the pump and by the slope in the direction of rotation Impellers away from the pump bottom and to the outlet from the pump is promoted. While the additional flow guide vanes conveying water without air inclusions only slightly affect or improve the performance of the pump, above all the described venting effect is very advantageous and very pronounced. Multiple airfoils may extend downwardly for tapping and conveying out air bladder fluid. In practice, however, it has been found that even a single flow vane shows good effect and may already be sufficient.
In vorteilhafter Ausgestaltung der Erfindung reicht die mindestens eine nach unten gezogene Strömungsleitschaufel nicht nur bis an die Unterseite des Impellers, sondern sogar mindestens bis kurz vor den Pumpenboden, vorteilhaft mit einem Abstand von maximal 5 mm, besonders vorteilhaft maximal 3 mm oder sogar nur 1 mm. Unter Umständen kann sie sogar bis an den Pumpenboden heranreichen und elastisch anliegen. Dann ist die genannte Abgreifwirkung maximal.In an advantageous embodiment of the invention, the at least one downwardly drawn Strömungsleitschaufel not only extends to the bottom of the impeller, but even at least until just before the bottom of the pump, advantageously with a maximum distance of 5 mm, more preferably at most 3 mm or even only 1 mm , Under certain circumstances, it can even reach up to the bottom of the pump and rest elastically. Then the mentioned tapping effect is maximal.
Die Strömungsleitschaufeln sind dabei vorteilhaft feststehend bzw. sind fest in der Pumpenkammer angeordnet, während sich der Impeller ja dreht. Dies schließt aber selbstverständlich nicht aus, dass die Strömungsleitschaufeln auch aus der Pumpenkammer herausgenommen werden können oder als separates Teil durch Einsetzen montiert werden können.The Strömungsleitschaufeln are advantageous fixed or are fixedly arranged in the pump chamber, while the impeller rotates yes. Of course, this does not exclude that the flow vanes can also be taken out of the pump chamber or can be mounted as a separate part by inserting.
Die wenigstens eine Strömungsleitschaufel ist vorteilhaft an einem umlaufenden Tragring vorgesehen, der im wesentlichen radial außerhalb eines oberen Bereichs des Impellers verläuft, und zwar derart, dass er das Ausströmen des zu fördernden Fluids aus dem Impeller in radialer Richtung nicht stört. Der Vorteil eines solchen Tragrings mit Strömungsleitschaufel daran ist der, dass nur ein einziges Teil hergestellt und in die Pumpenkammer eingesetzt sowie darin fixiert werden muss. An der genannten Stelle im oberen Bereich des Impellers stört der Tragring nicht. Die vorbeschriebene, mindestens eine bis an die Unterseite des Impellers oder an den Pumpenboden ragende Strömungsleitschaufel kann dann in axialer Richtung über den Tragring überstehen. Die bedeutet zwar, dass sie selbsttragend sein muss und nicht mehr am Tragring befestigt sowie durch diesen platziert ist. Durch entsprechende stabile Ausgestaltung der Strömungsleitschaufel ist dies jedoch kein Problem.The at least one flow vane is advantageously provided on a circumferential support ring, which extends substantially radially outside of an upper region of the impeller, in such a way that it does not interfere with the outflow of the fluid to be delivered from the impeller in the radial direction. The advantage of such a support ring with flow vane on it is that only a single part must be made and used in the pump chamber and fixed therein. At the said point in the upper part of the impeller, the support ring does not interfere. The above-described, at least one up to the bottom of the impeller or to the pump bottom protruding Strömungsleitschaufel can then protrude in the axial direction on the support ring. Although this means that it must be self-supporting and not attached to the support ring and placed by this. However, this is not a problem due to the correspondingly stable design of the flow guide vane.
Da zuvor beschrieben worden ist, dass es eigentlich ausreicht, wenn eine einzige Strömungsleitschaufel bis an die Unterseite des Impellers bzw. an den Pumpenboden reicht, wenngleich insgesamt mehrere vorgesehen sein können, wird es als ausreichend angesehen, wenn nur diese eine Strömungsleitschaufel über den Tragring übersteht bzw. von diesem absteht.As previously described, it is actually sufficient if a single flow vane up to the bottom of the impeller or to the bottom of the pump is sufficient, although a total of several can be provided, it is considered sufficient if only this one flow vane protrudes beyond the support ring and protrudes from this.
Bei einer einzigen Strömungsleitschaufel kann auch auf den Tragring verzichtet werden, wenn sie um mehr als 180° um den Impeller läuft und so positionsstabil gehalten werden kann. Vorteilhaft weist sie eine ganze Umdrehung um den Impeller auf.In a single flow vane can also be dispensed with the support ring when it runs more than 180 ° around the impeller and can be kept stable position. Advantageously, it has a complete revolution around the impeller.
Wie zuvor dargelegt worden ist, werden in der Praxis zwei oder maximal drei Strömungsleitschaufeln als ausreichend angesehen. Bei mehr als einer Strömungsleitschaufel kann diese dabei weniger als 180° um den Impeller umgehen. Vorzugsweise sind es weniger als 160°, aber mehr als 90°. Dies gilt insbesondere für eine Strömungsleitschaufel, die bis an die Unterseite des Impellers bzw. kurz vor oder an den Pumpenboden reicht. Eine weitere Strömungsleitschaufel, die nur an dem vorgenannten Tragring vorgesehen ist, kann etwa 90° oder etwas weniger umlaufen.As stated above, in practice, two or a maximum of three flow vanes are considered sufficient. With more than one flow vane it can handle less than 180 ° around the impeller. Preferably, it is less than 160 °, but more than 90 °. This is especially true for a flow vane that extends to the bottom of the impeller or just before or to the bottom of the pump. Another Strömungsleitschaufel, which is provided only on the aforementioned support ring, can rotate about 90 ° or slightly less.
In weiterer Ausgestaltung der Erfindung wird es als vorteilhaft angesehen, wenn die mindestens eine Strömungsleitschaufel im Verlauf von dem Pumpenboden weg einen zunehmend steiler ansteigenden Winkel aufweist. Dadurch wird bewirkt, dass der störende Schlauch aus zu förderndem Fluid und umlaufenden Wasserblasen mit einem eher flachen Winkel vom Pumpenboden abgenommen wird und auch danach der gesamte Fluidstrom zunehmend in axialer Richtung gelenkt wird. Ist dies erst einmal teilweise erfolgt, kann durch einen zunehmend steileren Winkel das Herausfördern beschleunigt bzw. verstärkt werden. Dabei kann vorgesehen sein, dass bei einem Umlauf einer Strömungsleitschaufel von etwa 90° um den Tragring herum dessen gesamte axiale Erstreckung überdeckt wird, also von einer unteren Kante bis zu einer oberen Kante.In a further embodiment of the invention, it is considered advantageous if the at least one flow vane in the course of the pump bottom away has an increasingly steeper rising angle. This causes the troublesome hose to be conveyed fluid and circulating water bubbles is removed at a rather shallow angle from the pump bottom and then the entire fluid flow is increasingly directed in the axial direction. Once this has taken place in part, the feeding out can be accelerated or increased by an increasingly steeper angle. It can be provided that in a circulation of a flow vane of about 90 ° around the support ring around its entire axial extent is covered, ie from a lower edge to an upper edge.
Ein in Umlaufrichtung der Strömungsleitschaufel ansteigender Winkel hat auch den Vorteil, dass die Geschwindigkeitskomponente in axialer Richtung, also auch zum Auslass aus der Pumpe heraus hin, zunimmt. So wird die Förderwirkung aus der Pumpe heraus verbessert.An angle which increases in the direction of rotation of the flow guide vane also has the advantage that the velocity component increases in the axial direction, that is to say also towards the outlet out of the pump. This improves the delivery effect from the pump.
In nochmaliger Weiterbildung der Erfindung kann vorgesehen sein, dass der Impeller an seiner Unterseite oder auch an seiner Oberseite geschlossen ist. An der Oberseite kann vorteilhaft eine obere Abdeckung vorgesehen sein.In a further development of the invention can be provided that the impeller is closed on its underside or on its upper side. At the top can be advantageously provided an upper cover.
Der vorbeschriebenen Tragring für die mindestens eine Strömungsleitschaufel überdeckt einen seitlichen radialen Auslass des Impellers zwischen oberer Abdeckung und Unterseite nicht. Hier befindet sich nur die bis an die Unterseite des Impellers bzw. kurz vor den Pumpenboden reichende Strömungsleitschaufel. Da, wie auch die eingangs genannten
In weiterer Ausgestaltung der Erfindung kann ein Pumpenbodenbereich radial außerhalb des Impellers nach oben gezogen sein, also weg von dem Pumpenboden bzw. dem darunter befindlichen Motor, und dabei einen schrägen Verlauf aufweisen mit zunehmendem radialen Abstand zu dem Impeller. Die bis an die Unterseite des Impellers verlaufende Strömungsleitschaufel kann dann mit geringem Abstand zu dem schrägen Pumpenbodenbereich verlaufen oder vorteilhaft sogar daran anliegen. Durch elastisches Anliegen kann quasi ein spaltloser Übergang geschaffen werden für einen verbesserten Abtransport der Luftblasen.In a further embodiment of the invention, a pump bottom region can be pulled radially outward of the impeller, ie away from the pump bottom or the motor located underneath, and thereby have an oblique course with increasing radial distance from the impeller. The running up to the underside of the impeller Strömungsleitschaufel can then run with a small distance to the sloping pump floor area or even advantageously abut it. By elastic concerns quasi a gapless transition can be created for an improved removal of the air bubbles.
In weiterer Ausgestaltung der Erfindung kann ein freier Anströmabschnitt der bis an die Unterseite des Impellers reichenden Strömungsleitschaufel, der eben nach unten reicht, zugespitzt sein bzw. verjüngt sein. Eine Zuspitzung bzw. Verjüngung kann in etwa gleichmäßig ausgebildet sein und von einer maximalen Breite am Ansatz an einem vorgenannten Tragring bis eben zu der Spitze am freien Ende des Anströmabschnitts nahe der Unterseite des Impellers bzw. an dem Pumpenboden anliegend reichen.In a further embodiment of the invention, a free inflow section of the reaching to the bottom of the impeller Strömungsleitschaufel, which just reaches down to be tapered or tapered. A Tapering or tapering may be approximately uniform and ranging from a maximum width at the base of an abovementioned support ring until just at the tip at the free end of the Anströmabschnitts near the bottom of the impeller or on the pump floor fitting.
Damit ist es möglich, dass quasi mit etwas radialem Abstand zu dem Impeller die Strömungsleitschaufel bzw. ihr Anströmabschnitt über einen Großteil des Querschnitts der Pumpenkammer radial außerhalb des Impellers an dem Pumpenboden bzw. der Wandung anliegt. Dadurch ist eben ein möglichst guter Abtransport von Luftblasen möglich bzw. es bilden sich keine Hinterschneidungen oder sonstige Räume, an denen sich die Luftblasen festsetzen können.Thus, it is possible that virtually with some radial distance from the impeller, the Strömungsleitschaufel or her Anströmabschnitt over a large part of the cross section of the pump chamber radially outside the impeller on the pump bottom or the wall is applied. As a result, the best possible removal of air bubbles is possible or there are no undercuts or other spaces where the air bubbles can settle.
In vorteilhafter Ausgestaltung der Erfindung kann vorgesehen sein, dass die über den Tragring überstehende Strömungsleitschaufel, die bis an die Unterseite des Impellers reicht bzw. am Pumpenboden anliegt, elastisch ausgebildet ist. Dies kann mit einer gewissen Federkraftbelastung sein. Hierzu eignet sich besonders der vorbeschriebene Anströmabschnitt.In an advantageous embodiment of the invention can be provided that the projecting beyond the support ring Strömungsleitschaufel that extends to the bottom of the impeller or is applied to the pump floor, is formed elastically. This can be with a certain spring load. For this purpose, the above-described inflow section is particularly suitable.
In vorteilhafter Weiterbildung der Erfindung kann vorgesehen sein, dass sich eine Strömungsleitschaufel nicht nur zum Pumpenboden hin über den Tragring erstreckt zum möglichst guten Abgreifen von Luftblasen, sondern sich auch in der anderen axialen Richtung erstreckt. Hierzu kann ein freistehender Ableitabschnitt vorgesehen sein, der beispielsweise das zu fördernde Fluid bzw. ein Gemisch aus zu förderndem Fluid und Luftblasen bis nahe an einen Auslass aus der Pumpenkammer direkt führt. So kann auch vorgegeben werden, wie oft das zu fördernde Fluid in der Pumpenkammer umläuft, bevor es aus der Pumpe ausströmt.In an advantageous embodiment of the invention can be provided that extends a Strömungsleitschaufel not only to the pump bottom through the support ring for best possible tapping of air bubbles, but also extends in the other axial direction. For this purpose, a free-standing discharge section can be provided which, for example, leads the fluid to be conveyed or a mixture of fluid and air bubbles to be conveyed directly to an outlet from the pump chamber. Thus it can also be specified how often the fluid to be pumped circulates in the pump chamber before it flows out of the pump.
In vorteilhafter Ausgestaltung der Erfindung kann die Strömungsleitschaufel so ausgebildet sein, dass sie nur halb bis an eine Außenwandung der vom zu fördernden Fluid gefüllten Pumpenkammer reicht. Dadurch kann sichergestellt werden, dass sich die durch die Strömungsleitschaufel erwünschte Förderwirkung erreicht wird. Ist die äußere Kammerwandung beheizt, so wird diese Heizwirkung nicht beeinträchtigt. Nach radial innen verläuft die zumindest eine Strömungsleitschaufel außerhalb des Impellers. Etwas darüber verläuft die Strömungsleitschaufel am Tragring. Damit dieser die Pumpenkammer nicht unnötig verkleinert, sollte er möglichst nahe an einer Innenwandung der Pumpenkammer verlaufen bzw. daran anliegen. Diese Innenwandung besteht üblicherweise aus einem Rohrabschnitt, der einerseits die zentrale axiale Ansaugung für das zu fördernde Fluid bildet und deswegen nahe an die Oberseite des Impellers verläuft, sich dann etwas aufweitet und quasi nach außen umstülpt und die Richtung umkehrt und dann wieder zum Pumpendeckel bzw. zur Pumpenkammeroberseite verläuft. Des Weiteren bleibt dadurch in dem Fall, dass die Pumpe die genannte Heizung an der Außenseite der Pumpenkammer aufweist, deren Wirkung möglichst unbeeinträchtigt. Der Tragring stört also weder die Wasserströmung an der Beheizung noch vermindert er sonstwie deren Wirkung.In an advantageous embodiment of the invention, the flow guide vane can be designed so that it only halfway to an outer wall of the pump chamber filled by the fluid to be delivered ranges. This can ensure that the desired through the flow vane conveying effect is achieved. If the outer chamber wall is heated, this heating effect is not impaired. After radially inward, the at least one flow guide blade extends outside of the impeller. Slightly above it, the flow vane runs on the support ring. So that this does not unnecessarily reduce the pump chamber, it should run as close as possible to an inner wall of the pump chamber or rest against it. This inner wall usually consists of a pipe section, on the one hand forms the central axial intake for the fluid to be pumped and therefore runs close to the top of the impeller, then slightly expands and almost inverted outwards and reverses the direction and then back to the pump cover or runs to the pump chamber top. Furthermore, in the event that the pump has said heating on the outside of the pump chamber, its effect remains as unimpaired as possible. The support ring thus disturbs neither the flow of water at the heating nor does it otherwise reduce their effect.
Diese und weitere Merkmale gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei einer Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. Die Unterteilung der Anmeldung in einzelne Abschnitte sowie Zwischen-Überschriften beschränken die unter diesen gemachten Aussagen nicht in ihrer Allgemeingültigkeit.These and other features will become apparent from the claims and from the description and drawings, wherein the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen schematisch dargestellt und werden im Folgenden näher erläutert. In den Zeichnungen zeigen:
- Fig. 1
- einen seitlichen Längsschnitt durch eine erfindungsgemäße Pumpe,
- Fig. 2
- eine Schrägansicht eines Tragrings mit zwei Strömungsleitschaufeln daran und dem zugehörigen Impeller entsprechend
Fig. 1 , - Fig. 3
- die Ansicht auf den Tragring aus
Fig. 2 mit den Strömungsleitschaufeln ohne Impeller, - Fig. 4
- eine Draufsicht auf die Anordnung aus
Fig. 2 , - Fig. 5
- eine Seitenansicht auf die Anordnung aus
Fig. 2 und - Fig. 6
- eine Abwandlung entsprechend der Darstellung aus
Fig. 5 mit einer weiter nach unten gezogenen Strömungsleitschaufel.
- Fig. 1
- a lateral longitudinal section through a pump according to the invention,
- Fig. 2
- an oblique view of a support ring with two flow guide vanes and the associated impeller accordingly
Fig. 1 . - Fig. 3
- the view on the support ring
Fig. 2 with the flow vanes without impeller, - Fig. 4
- a plan view of the arrangement
Fig. 2 . - Fig. 5
- a side view of the arrangement
Fig. 2 and - Fig. 6
- a modification as shown
Fig. 5 with a downwardly drawn flow vane.
In
Am Pumpengehäuse 12 sind weiterhin ein Pumpenboden mit einem inneren Pumpenboden 15a und einem äußeren Pumpenboden 15b ausgebildet sowie ein zentraler axialer rohrartiger Einlass 16, der in eine Pumpenabdeckung 17 übergeht. Diese wiederum geht in eine innere Wandung über, die zu einem seitlichen Auslass 18 führt.On the
Der Einlass 16 führt zu einem über dem Pumpenboden 15 auf übliche Art und Weise gelagerten Impeller 19. Er ist als geschlossener Impeller 19 mit einer unteren Impellerscheibe 20, einer oberen Impellerscheibe 21 und Haupt-Leitschaufeln 23 dazwischen ausgebildet. In
Zwischen innerem Pumpenboden 15a und äußerem Pumpenboden 15b ist eine Stufe angeordnet, die quasi knapp außerhalb der unteren Impellerscheibe 20 liegt. Es ist zu erkennen, dass der äußere Pumpenboden 15b in etwa die Wölbung bzw. Krümmung der unteren Impellerscheibe 20 nachbildet. Dies dient einer verbesserten Fluidströmung.Between inner pump bottom 15 a and outer pump bottom 15 b, a step is arranged, which is almost just outside the
Zum Fördern von Fluid in der Pumpe 11 dreht sich der Impeller 19 in Längsrichtung von links gesehen im Uhrzeigersinn und fördert radial und mit einer Geschwindigkeitskomponente in Umfangsrichtung Fluid in die Pumpenkammer 13 hinein. Die Kammerwandung 14 ist auf nicht dargestellte Art und Weise als Heizelement ausgebildet bzw. beheizt, so dass das an ihrer Innenseite entlang strömende Fluid auf dem Weg zum Auslass 18 mit mehreren Umdrehungen daran entlang strömt und erhitzt wird. Auch hierzu wird auf die vorgenannte
Um den zylindrischen Abschnitt der Pumpenabdeckung 17 herum verläuft radial außerhalb und auf Höhe der oberen Impellerscheibe 21 ein Tragring 29. Er kann auf die Pumpenabdeckung 17 mit Press-Sitz aufgeschoben werden zum Fixieren, alternativ kann er aufgerastet oder aufgeklebt sein. Er steht in axialer Richtung nur geringfügig nach rechts über die Pumpenabdeckung 17 über. Wie aus dem Vergleich mit den nachfolgenden
Aus
In
Wie aus der Draufsicht in
In der Abwandlung der Seitenansicht aus
Des Weiteren ist gestrichelt dargestellt, wie bei einer zweiten Strömungsleitschaufel 125b ein oberes freies Ende 127b als vorgenannter Ableitabschnitt in der anderen Richtung frei über den Tragring 129 überstehen kann und dann, auf die
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011005138A DE102011005138A1 (en) | 2011-03-04 | 2011-03-04 | pump |
Publications (3)
Publication Number | Publication Date |
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EP2495444A2 true EP2495444A2 (en) | 2012-09-05 |
EP2495444A3 EP2495444A3 (en) | 2014-01-15 |
EP2495444B1 EP2495444B1 (en) | 2015-07-01 |
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EP12157676.3A Active EP2495444B1 (en) | 2011-03-04 | 2012-03-01 | Pump |
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US (1) | US8899918B2 (en) |
EP (1) | EP2495444B1 (en) |
DE (1) | DE102011005138A1 (en) |
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WO2016007317A1 (en) * | 2014-07-09 | 2016-01-14 | Aerojet Rocketdyne, Inc. | Turbopump with axially curved vane |
DE102015219489A1 (en) | 2015-10-08 | 2017-04-13 | BSH Hausgeräte GmbH | Water-bearing household appliance with a pump |
DE102016208020A1 (en) | 2016-05-10 | 2017-11-16 | BSH Hausgeräte GmbH | Liquid heating pump for conveying and heating liquid in a water-conducting domestic appliance |
DE102016208017A1 (en) | 2016-05-10 | 2017-11-16 | BSH Hausgeräte GmbH | Liquid heating pump for conveying and heating liquid in a water-conducting domestic appliance |
EP3293304A1 (en) * | 2016-09-13 | 2018-03-14 | Lg Electronics Inc. | Drain pump |
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DE102012210554A1 (en) * | 2012-06-22 | 2013-12-24 | E.G.O. Elektro-Gerätebau GmbH | pump |
DE102012216196A1 (en) * | 2012-09-12 | 2014-03-13 | E.G.O. Elektro-Gerätebau GmbH | pump |
DE102012025758B3 (en) | 2012-10-04 | 2021-12-02 | E.G.O. Elektro-Gerätebau GmbH | Impeller pump |
DE102012218145B4 (en) * | 2012-10-04 | 2018-12-27 | E.G.O. Elektro-Gerätebau GmbH | impeller |
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DE102013200280A1 (en) | 2013-01-10 | 2014-07-10 | E.G.O. Elektro-Gerätebau GmbH | impeller |
DE102013202346B3 (en) * | 2013-02-13 | 2014-05-28 | E.G.O. Elektro-Gerätebau GmbH | Impeller pump for conveying medium, has cutout provided in lateral wall of pump chamber, and heating element located along entire edge of cut sealing, where heating element is arranged in path of conveyed medium from impeller to outlet |
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WO2016007317A1 (en) * | 2014-07-09 | 2016-01-14 | Aerojet Rocketdyne, Inc. | Turbopump with axially curved vane |
US11268515B2 (en) | 2014-07-09 | 2022-03-08 | Aerojet Rocketdyne, Inc. | Turbopump with axially curved vane |
DE102015219489A1 (en) | 2015-10-08 | 2017-04-13 | BSH Hausgeräte GmbH | Water-bearing household appliance with a pump |
DE102015219489B4 (en) | 2015-10-08 | 2021-12-16 | BSH Hausgeräte GmbH | Water-bearing household appliance with a pump |
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WO2017194300A1 (en) | 2016-05-10 | 2017-11-16 | BSH Hausgeräte GmbH | Liquid heating pump for conveying and heating liquid in a household appliance which uses water |
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WO2017194301A1 (en) | 2016-05-10 | 2017-11-16 | BSH Hausgeräte GmbH | Liquid heating pump for conveying and heating liquid in a water-bearing domestic appliance |
DE102016208017A1 (en) | 2016-05-10 | 2017-11-16 | BSH Hausgeräte GmbH | Liquid heating pump for conveying and heating liquid in a water-conducting domestic appliance |
DE102016208020A1 (en) | 2016-05-10 | 2017-11-16 | BSH Hausgeräte GmbH | Liquid heating pump for conveying and heating liquid in a water-conducting domestic appliance |
EP3293304A1 (en) * | 2016-09-13 | 2018-03-14 | Lg Electronics Inc. | Drain pump |
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EP4140386A4 (en) * | 2020-04-30 | 2023-10-11 | Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. | Flow guiding element, heat collecting pump and dishwasher |
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Also Published As
Publication number | Publication date |
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EP2495444A3 (en) | 2014-01-15 |
US20120224961A1 (en) | 2012-09-06 |
EP2495444B1 (en) | 2015-07-01 |
US8899918B2 (en) | 2014-12-02 |
DE102011005138A1 (en) | 2012-09-06 |
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