EP2228541A1 - Rotor for a rotary pump - Google Patents
Rotor for a rotary pump Download PDFInfo
- Publication number
- EP2228541A1 EP2228541A1 EP09003369A EP09003369A EP2228541A1 EP 2228541 A1 EP2228541 A1 EP 2228541A1 EP 09003369 A EP09003369 A EP 09003369A EP 09003369 A EP09003369 A EP 09003369A EP 2228541 A1 EP2228541 A1 EP 2228541A1
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- EP
- European Patent Office
- Prior art keywords
- blades
- blade
- impeller
- pair
- impeller 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
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 3
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
Definitions
- the invention relates to an impeller for a centrifugal pump according to the features specified in the preamble of claim 1.
- Such wheels consist at least of a support body, typically a support plate and arranged thereon blades.
- the support disk is regularly designed for rotationally fixed arrangement on a shaft.
- the impeller blades are exposed depending on the design (open impeller) or covered by a cover plate, which is opposite to the support plate and connected to the blades.
- Such wheels are known in a variety of designs and are used in single or multi-stage centrifugal pumps, they typically have two or more impeller blades, which may be the same or different and / or arranged.
- centrifugal pumps are available in different sizes.
- the size variance is varied not only by changing the geometrical dimensions and driving power, but also by variance of the blades. If z.
- the invention is based on the object, manufacturing technology favorable impeller variance, d. H. To create wheels with different funding characteristics that are possible cost, especially made of sheet metal.
- the impeller according to the invention for a centrifugal pump has a support disk with blades arranged thereon, in which blades are arranged in pairs next to one another and at least one Shovel pair forming blades have the same shape and size.
- the basic idea of the present invention is to provide at least one, preferably a plurality of blade pairs on the impeller, which are each arranged next to each other and have the same shape and size.
- these blades preferably have the same shape and size in the final product.
- the fundamental idea is to reduce the variance of the blade shape, so that the number of tools for producing the blades can be reduced and, moreover, the feeding of the blades in the production process and their handling is simplified.
- the shape and size of such pairs of blades are identical, d. h, they have the same dimensions and the same radii of curvature.
- a pair of blades can form a flow-effective blade. So it can be formed with two blades of the same shape hydraulically different effective blades on the impeller solely by arranging the blades.
- the shape of the blade of such a blade pair according to the invention is typically designed as used in a normal impeller.
- the achievable by the paired arrangement of identical wheels according to the invention variance is then used for special purposes.
- such an elongate blade can be formed by two blades of a pair of blades which are telescoped to each other.
- Such an extended blade can, for example, for a support disc larger diameter are used when an impeller is to be designed to achieve a higher head.
- an impeller is to be designed to produce a lower delivery rate.
- a blade pair consisting of two blades of the same shape and size can be arranged and aligned such that a dead space forms therebetween fluidically, namely if the radially inner end of one blade bears against the other blade and the radially outer ends are spaced apart, It is understood that a required plurality of such impeller pairs can be arranged on a support disk and that the dead space thus formed is particularly effective when the impeller has a covering cover disk.
- such a dead space can also be formed in another way by a pair of vanes of blades of the same shape and size, for example, when the radially outer ends abut each other and the inner ends are spaced apart, which, however, should generally be less favorable.
- the present invention can be applied to open or covered wheels, particularly advantageous for wheels having a covering shroud.
- the blades of a blade pair can be positioned such that a blade of the blade pair protrudes radially beyond the support and / or cover disk. This results hydraulically different effective blades. possibly in a further manufacturing step, the protruding ends can be removed or left so.
- an impeller blade is advantageously dimensioned so that it has a constant height over its entire length. This is particularly advantageous for the pairwise arrangement, since dead spaces can be created particularly well or longer blades can be formed.
- the invention is particularly advantageous applicable to wheels that are made of sheet metal, in which so support and / or cover plate and the blades are formed of sheet metal and joined together by welding. Basically, however, the invention is not limited thereto. It is also advantageously applicable to wheels made of other materials, such as plastics or composite materials, in particular when support disk, shroud and blades are made independently and then joined.
- This in Fig. 1 shown impeller has a circular support plate 1, which has a central recess 2, which is profiled and is provided for non-rotatable connection with a drive shaft, not shown, as counts in centrifugal pumps of the prior art.
- a plurality of impeller blades 3 is arranged, which extend at a distance from the recess 2 to the outer periphery of the support disk 1.
- the blades 3 are covered on the opposite side of the support disk 1 by a cover plate 4, which in the embodiment according to Fig. 1 on the inside in an annular portion 5 opens, which forms the inlet of the impeller, as is known per se and therefore will not be described in detail here.
- FIG Fig. 2 When the cover plate 4 is removed, the shape and arrangement of the blades 3 can be seen, as shown in FIG Fig. 2 is shown by way of example.
- This impeller according Fig. 2 has a total of six blades 3, which have the same shape and size and are arranged at the same angular distance on the support disk 1.
- FIGS. 1 and 2 is designed to be designed for lower flow rates are in the impeller according to Fig. 3 in each case two blades 3a and 3b are arranged to form a pair of blades such that a dead space 6 is hydraulically arranged between them forms.
- the blades 3a and 3b are of the same shape and size, ie they have the same length, the same height and the same radius of curvature for the same material thickness. However, they are arranged differently.
- the blades 3a are arranged in the same way as those in the impeller according to Fig.
- blades 3b are arranged such that the radially inner end 7 of a blade 3b abuts the inside of a blade 3a, whereas the radially outer ends 8 of the blades 3a and 3b are spaced apart.
- Fig. 4 In the execution according to Fig. 4 are on the support plate 1 also six blade pairs, each consisting of the blades 3a and 3b, arranged, but not to form a dead space, but to form longer blades.
- the blades 3a and 3b are applied to each other in pairs and pulled apart telescopically, so that in comparison to the individual blades 3a and 3b from each pair of blades a single hydraulically effective blade, but longer length results.
- Fig. 5 are also six pairs of blades each consisting of the blades 3a and 3b arranged on a support disk 1.
- the vanes 3a are arranged radially further inward so that their radially outer ends terminate with the outer circumference of the support disk 1, whereas the outer ends of the vanes 3b protrude beyond this outer circumference.
- the blades 3a and 3b are arranged at different angles to each other.
- the pairs of blades 3a and 3b arranged on the support disk 1 are identical in shape and size, ie they have the same length, the same height and the same radius of curvature. That way you can get wheels different hydraulic properties can be produced using the same shape components, which is advantageous, since one and the same punching tool can be used for the blades 3 and 3a and 3b. It is understood that this is not mandatory. It can also be arranged under pairwise arrangement of the same shape blades 3a and 3b on a wheel different blade pairs or other other blades, if this is advantageous or appropriate.
- the according to Fig. 5 illustrated and above impeller may optionally be processed in a further processing step, such that the protruding ends of the blades 3b are removed, then the resulting pairs of blades, consisting of the blades 3b 'and 3a, are no longer form-and after this processing step size the same.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Die Erfindung betrifft ein Laufrad für eine Kreiselpumpe gemäß den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen.The invention relates to an impeller for a centrifugal pump according to the features specified in the preamble of claim 1.
Derartige Laufräder bestehen mindestens aus einem Tragkörper, typischerweise einer Tragscheibe und darauf angeordneten Schaufeln. Die Tragscheibe ist dabei regelmäßig zur drehfesten Anordnung auf einer Welle ausgebildet. Die Laufradschaufeln sind je nach Bauart freiliegend (offenes Laufrad) oder durch eine Deckscheibe abgedeckt, die der Tragscheibe gegenüber liegt und mit den Schaufeln verbunden ist. Derartige Laufräder sind in unterschiedlichsten Bauformen bekannt und werden in ein- oder mehrstufigen Kreiselpumpen eingesetzt, Sie weisen typischerweise zwei oder mehr Laufradschaufeln auf, die gleich oder auch unterschiedlich ausgebildet und/oder angeordnet sein können.Such wheels consist at least of a support body, typically a support plate and arranged thereon blades. The support disk is regularly designed for rotationally fixed arrangement on a shaft. The impeller blades are exposed depending on the design (open impeller) or covered by a cover plate, which is opposite to the support plate and connected to the blades. Such wheels are known in a variety of designs and are used in single or multi-stage centrifugal pumps, they typically have two or more impeller blades, which may be the same or different and / or arranged.
Bei aus Kunststoff gebildeten Laufrädern, die im Spritzgussverfahren hergestellt werden, ist für jede Änderung am Laufrad in der Regel ein gesondertes Werkzeug erforderlich. Es können jedoch auf einem Laufrad Schaufeln unterschiedlicher Anordnung und Größe vorgesehen sein, ohne die Fertigungskosten zu erhöhen. Wird das Laufrad hingegen, wie dies bei einer vielzahl von Kreiselpumpen der Fall ist, aus Blechen, typischerweise aus Edelstahlblechen gebildet, so sind für unterschiedliche Schaufelformen unterschiedliche Werkzeuge erforderlich, was die Herstellungskosten erhöht. Die Herstellung selbst erfolgt dadurch, dass auf der Tragscheibe die einzelnen Schaufeln ausgerichtet, angeordnet und dann mit dieser verschweißt werden, wonach ggf, die Deckscheibe aufgesetzt und ebenfalls mit den Schaufeln verschweißt wird.In plastic wheels formed by injection molding, for each change on the impeller usually a separate tool is required. However, blades of different arrangement and size may be provided on an impeller without increasing manufacturing costs. On the other hand, if the impeller, as is the case with a large number of centrifugal pumps, is formed from sheets, typically made of stainless steel sheets, then different tools are required for different blade shapes, which increases the production costs. The production itself takes place in that aligned on the support plate, the individual blades, arranged and then welded to this, after which, if necessary, the cover plate is placed and also welded to the blades.
Um eine Vielzahl von Anwendungsfällen abdecken zu können, werden Kreiselpumpen in unterschiedlichen Baugrößen angeboten. Die Größenvarianz wird jedoch nicht nur durch Veränderung der geometrischen Abmessungen und der Antriebsleistung variiert, sondern auch durch Varianz der Schaufeln. Wenn z. B. ein Laufrad, das bei einem bestimmten Druck eine bestimmte Fördermenge fördert, hinsichtlich einer reduzierten Fördermenge ausgelegt werden soll, so kann beispielsweise die Schaufelhöhe entsprechend verringert werden. Dem sind jedoch natürliche Grenzen gesetzt, da innerhalb des Laufrads eine Mindestdurchgangshöhe erhalten bleiben muss, um den störungsfreien Betrieb zu gewährleisten. Bei gegossenen Laufrädern zählt es zum Stand der Technik, Zwischenräume zwischen Schaufelpaaren auszufüllen, um die Fördermenge zu reduzieren. Bei aus Blech hergestellten Laufrädern ist dies nicht bzw. nur mit erhöhtem Aufwand möglich, indem zwei Schaufeln zur Bildung eines Totraums angeordnet werden. Für jede dieser Schaufeln ist jedoch ein gesondertes Stanzwerkzeug erforderlich.To cover a variety of applications, centrifugal pumps are available in different sizes. However, the size variance is varied not only by changing the geometrical dimensions and driving power, but also by variance of the blades. If z. As an impeller, which promotes a certain pressure at a certain pressure, should be designed in terms of a reduced flow, so for example, the blade height can be reduced accordingly. However, there are natural limits, as within the impeller a minimum passage height must be maintained to ensure trouble-free operation. For cast wheels, it is state of the art to fill spaces between pairs of blades to reduce the flow rate. For impellers made of sheet metal this is not possible or only with increased effort by two blades are arranged to form a dead space. For each of these blades, however, a separate punching tool is required.
Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, herstellungstechnisch günstig eine Laufradvarianz, d. h. Laufräder mit unterschiedlichen Fördercharakteristiken zu schaffen, die möglichst kostengünstig, insbesondere aus Blech herstellbar sind.Against this background, the invention is based on the object, manufacturing technology favorable impeller variance, d. H. To create wheels with different funding characteristics that are possible cost, especially made of sheet metal.
Diese Aufgabe wird gemäß der Erfindung durch ein Laufrad mit den in Anspruch 1 angegebenen Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen, der nachfolgenden Beschreibung und der Zeichnung angegeben.This object is achieved according to the invention by an impeller having the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims, the following description and the drawing.
Das erfindungsgemäße Laufrad für eine Kreiselpumpe weist eine Tragscheibe mit darauf angeordneten Schaufeln auf, bei dem Schaufeln paarweise nebeneinander angeordnet sind und zumindest die ein Schaufelpaar bildenden Schaufeln die gleiche Form und Größe aufweisen.The impeller according to the invention for a centrifugal pump has a support disk with blades arranged thereon, in which blades are arranged in pairs next to one another and at least one Shovel pair forming blades have the same shape and size.
Grundgedanke der vorliegenden Erfindung ist es, zumindest ein, vorzugsweise mehrere Schaufelpaare am Laufrad vorzusehen, welche jeweils nebeneinander angeordnet sind und die gleiche Form und Größe aufweisen. Dabei weisen diese Schaufeln bevorzugt im Endprodukt die gleiche Form und Größe auf. Es ist jedoch gemäß der Erfindung auch denkbar, nur in einem Zwischenschritt diese Schaufeln gleicher Form und Größe zu nutzen und in einem weiteren Bearbeitungsschritt die Form und/oder Größe ggf. zu ändern. Tragender Gedanke ist jedenfalls, die Varianz der Schaufelform zu verringern, so dass die Anzahl der Werkzeuge zur Herstellung der Schaufeln verringert werden kann und darüber hinaus die Zuführung der Schaufeln im Fertigungsprozess und deren Handhabung vereinfacht wird. Dabei ist vorteilhaft die Form und Größe solcher Schaufelpaare identisch, d. h, sie weisen gleiche Abmessungen und gleiche Krümmungsradien auf.The basic idea of the present invention is to provide at least one, preferably a plurality of blade pairs on the impeller, which are each arranged next to each other and have the same shape and size. In this case, these blades preferably have the same shape and size in the final product. However, according to the invention, it is also conceivable to use these blades of the same shape and size only in an intermediate step and, if necessary, to change the shape and / or size in a further processing step. In any case, the fundamental idea is to reduce the variance of the blade shape, so that the number of tools for producing the blades can be reduced and, moreover, the feeding of the blades in the production process and their handling is simplified. Advantageously, the shape and size of such pairs of blades are identical, d. h, they have the same dimensions and the same radii of curvature.
Gemäß der Erfindung kann ein Schaufelpaar eine strömungswirksame Schaufel bilden. Es können also mit zwei Schaufeln gleicher Form hydraulisch unterschiedlich wirksame Schaufeln am Laufrad ausgebildet werden allein durch Anordnung der Schaufeln. Dabei ist die Form der Schaufel eines solchen Schaufelpaares gemäß der Erfindung typischerweise so ausgelegt, wie sie bei einem normalen Laufrad zum Einsatz kommt. Die durch die paarweise Anordnung formgleicher Laufräder gemäß der Erfindung erzielbare Varianz wird dann für Sonderzwecke eingesetzt.According to the invention, a pair of blades can form a flow-effective blade. So it can be formed with two blades of the same shape hydraulically different effective blades on the impeller solely by arranging the blades. The shape of the blade of such a blade pair according to the invention is typically designed as used in a normal impeller. The achievable by the paired arrangement of identical wheels according to the invention variance is then used for special purposes.
So kann beispielsweise zur Erhöhung der Länge einer Schaufel gemäß der Erfindung eine solche verlängerte Schaufel durch zwei teleskopartig aneinander gelegte Schaufeln eines Schaufelpaares gebildet werden. Eine solche verlängerte Schaufel kann beispielsweise für eine Tragscheibe größeren Durchmessers eingesetzt werden, wenn ein Laufrad zur Erzielung einer größeren Förderhöhe ausgelegt werden soll.Thus, for example, to increase the length of a blade according to the invention, such an elongate blade can be formed by two blades of a pair of blades which are telescoped to each other. Such an extended blade can, for example, for a support disc larger diameter are used when an impeller is to be designed to achieve a higher head.
Wie eingangs beispielhaft erläutert, kommt es in der Praxis auch vor, dass ein Laufrad zur Erzeugung einer geringeren Fördermenge ausgelegt werden soll. Dann kann gemäß der Erfindung ein Schaufelpaar bestehend aus zwei Schaufeln gleicher Form und Größe so angeordnet und ausgerichtet werden, dass sich strömungstechnisch dazwischen ein Totraum bildet, wenn nämlich das radial innere Ende einer Schaufel an der anderen Schaufel anliegt und die radial äußeren Enden beabstandet sind, Es versteht sich, dass auf einer Tragscheibe eine erforderliche Vielzahl solcher Schaufelradpaare angeordnet werden kann und dass der so gebildete Totraum besonders wirksam ist, wenn das Laufrad eine abdeckende Deckscheibe aufweist.As explained at the outset by way of example, it also happens in practice that an impeller is to be designed to produce a lower delivery rate. Then, according to the invention, a blade pair consisting of two blades of the same shape and size can be arranged and aligned such that a dead space forms therebetween fluidically, namely if the radially inner end of one blade bears against the other blade and the radially outer ends are spaced apart, It is understood that a required plurality of such impeller pairs can be arranged on a support disk and that the dead space thus formed is particularly effective when the impeller has a covering cover disk.
Grundsätzlich kann ein solcher Totraum auch in anderer Weise durch ein Schaufelpaar von Schaufeln gleicher Form und Größe gebildet werden, wenn beispielsweise die radial äußeren Enden aneinander anliegen und die inneren Enden beabstandet sind, was jedoch in der Regel weniger günstig sein dürfte.In principle, such a dead space can also be formed in another way by a pair of vanes of blades of the same shape and size, for example, when the radially outer ends abut each other and the inner ends are spaced apart, which, however, should generally be less favorable.
Grundsätzlich kann die vorliegende Erfindung bei offenen oder abgedeckten Laufrädern angewandt werden, besonders vorteilhaft bei Laufrädern mit einer abdeckenden Deckscheibe.In principle, the present invention can be applied to open or covered wheels, particularly advantageous for wheels having a covering shroud.
Gemäß einer Weiterbildung der Erfindung können die Schaufeln eines Schaufelpaares derart positioniert sein, dass eine Schaufel des Schaufelpaares radial über die Trag- und/oder Deckscheibe hinausragt. Dadurch ergeben sich hydraulisch unterschiedlich wirksame Schaufeln. wobei ggf. in einem weiteren Fertigungsschritt die überstehenden Enden entfernt werden können oder so belassen werden.According to a development of the invention, the blades of a blade pair can be positioned such that a blade of the blade pair protrudes radially beyond the support and / or cover disk. This results hydraulically different effective blades. possibly in a further manufacturing step, the protruding ends can be removed or left so.
Herstellungstechnisch besonders vorteilhaft ist es, wenn alle Schaufeln die gleiche Form und Größe aufweisen, da dann nur ein Werkzeug zur Herstellung der Schaufeln benötigt wird.It is particularly advantageous in terms of production technology if all the blades have the same shape and size, because then only one tool is needed to produce the blades.
Insbesondere für Laufräder mit Deckscheibe wird eine Laufradschaufel vorteilhaft so dimensioniert, dass sie über ihre gesamte Länge eine konstante Höhe aufweist. Dies ist insbesondere für die paarweise Anordnung von Vorteil, da so besonders gut Toträume geschaffen oder längere Schaufeln gebildet werden können.In particular, for wheels with shroud an impeller blade is advantageously dimensioned so that it has a constant height over its entire length. This is particularly advantageous for the pairwise arrangement, since dead spaces can be created particularly well or longer blades can be formed.
Die Erfindung ist besonders vorteilhaft anwendbar bei Laufrädern, die aus Blech gefertigt sind, bei denen also Trag- und/oder Deckscheibe sowie die Schaufeln aus Metallblech gebildet und durch Schweißen miteinander verbunden sind. Grundsätzlich beschränkt sich die Erfindung jedoch nicht hierauf. Sie ist auch vorteilhaft anwendbar für Laufräder aus anderen Materialien, beispielsweise aus Kunststoffen oder Verbundwerkstoffen, insbesondere dann, wenn Tragscheibe, Deckscheibe und Schaufeln unabhängig voneinander gefertigt und dann gefügt werden.The invention is particularly advantageous applicable to wheels that are made of sheet metal, in which so support and / or cover plate and the blades are formed of sheet metal and joined together by welding. Basically, however, the invention is not limited thereto. It is also advantageously applicable to wheels made of other materials, such as plastics or composite materials, in particular when support disk, shroud and blades are made independently and then joined.
Die Erfindung ist nachfolgend anhand von Ausführungsbeispielen erläutert, die in der Zeichnung dargestellt sind. Es zeigen:
- Fig. 1
- in stark vereinfachter, schematischer, perspektivischer Darstellung ein Kreiselpumpenlaufrad,
- Fig. 2
- eine Draufsicht auf ein Laufrad ohne Deckscheibe,
- Fig. 3
- ein erstes Ausführungsbeispiel gemäß der Erfindung in Darstellung nach
Fig. 2 , - Fig.4
- ein zweites Ausführungsbeispiel gemäß der Erfindung in Darstellung nach
Fig. 2 , - Fig. 5
- ein drittes Ausführungsbeispiel in Darstellung gemäß
Fig. 2 und - Fig. 6
- eine Weiterbildung des Ausführungsbeispiels gemäß
Fig. 5 in Darstellung nochFig. 2 .
- Fig. 1
- in a highly simplified, schematic, perspective view of a centrifugal pump impeller,
- Fig. 2
- a plan view of an impeller without cover plate,
- Fig. 3
- a first embodiment according to the invention in illustration according to
Fig. 2 . - Figure 4
- A second embodiment according to the invention in illustration according to
Fig. 2 . - Fig. 5
- a third embodiment in illustration according to
Fig. 2 and - Fig. 6
- a development of the embodiment according to
Fig. 5 in representation yetFig. 2 ,
Das in
Bei abgenommener Deckscheibe 4 ist die Form und Anordnung der Schaufeln 3 zu erkennen, wie dies in
Um ein solches Laufrad, wie es anhand der
Bei der Ausführung gemäß
Bei der dritten Ausführung gemäß
In allen vorbeschriebenen Ausführungsbeispielen sind die auf der Tragscheibe 1 paarweise angeordneten Schaufeln 3a und 3b identisch in Form und Größe, d. h. sie weisen die gleiche Länge, die gleiche Höhe und den gleichen Krümmungsradius auf. Auf diese Weise können Laufräder unterschiedlicher hydraulischer Eigenschaften unter Verwendung formgleicher Bauteile hergestellt werden, was von Vorteil ist, da für die Schaufeln 3 bzw. 3a und 3b ein und dasselbe Stanzwerkzeug Verwendung finden kann. Es versteht sich, dass dies nicht zwingend erforderlich ist. Es können auch unter paarweiser Anordnung von formgleichen Schaufeln 3a und 3b auf einem Laufrad unterschiedliche Schaufelpaare oder weitere andere Schaufeln angeordnet sein, wenn dies vorteilhaft oder zweckmäßig ist.In all the embodiments described above, the pairs of
Das gemäß
- 1 -1 -
- Tragscheibecarrying disc
- 2 -2 -
- Ausnehmungrecess
- 3 -3 -
- Schaufelnshovel
- 3a -3a -
- eine Schaufel eines Schaufelpaaresa shovel of a pair of shovels
- 3b -3b -
- andere Schaufel eines Schaufelpaaresother shovel of a pair of shovels
- 4 -4 -
- Deckscheibecover disc
- 5 -5 -
- ringförmiger Abschnittannular section
- 6 -6 -
- Totraumdead space
- 7 -7 -
- inneres Ende einer Schaufelinner end of a shovel
- 8 -8th -
- äußeres Ende einer Schaufelouter end of a shovel
- 3b' -3b '-
- abgeschnittene Schaufelcut off scoop
Claims (10)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09003369A EP2228541B1 (en) | 2009-03-09 | 2009-03-09 | Rotor for a rotary pump |
TW098121123A TWI495795B (en) | 2009-03-09 | 2009-06-24 | Impeller for a centrifugal pump |
US12/714,626 US8740569B2 (en) | 2009-03-09 | 2010-03-01 | Impeller for a centrifugal pump |
CN201010128895.9A CN101832291B (en) | 2009-03-09 | 2010-03-04 | Impeller for a centrifugal pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09003369A EP2228541B1 (en) | 2009-03-09 | 2009-03-09 | Rotor for a rotary pump |
Publications (2)
Publication Number | Publication Date |
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EP2228541A1 true EP2228541A1 (en) | 2010-09-15 |
EP2228541B1 EP2228541B1 (en) | 2012-11-14 |
Family
ID=40933589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09003369A Active EP2228541B1 (en) | 2009-03-09 | 2009-03-09 | Rotor for a rotary pump |
Country Status (4)
Country | Link |
---|---|
US (1) | US8740569B2 (en) |
EP (1) | EP2228541B1 (en) |
CN (1) | CN101832291B (en) |
TW (1) | TWI495795B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2703855C (en) * | 2009-07-31 | 2018-12-11 | Rem Enterprises Inc. | Improved air vacuum pump for a particulate loader and transfer apparatus |
US9022742B2 (en) * | 2012-01-04 | 2015-05-05 | Aerojet Rocketdyne Of De, Inc. | Blade shroud for fluid element |
KR101914215B1 (en) * | 2012-04-17 | 2018-11-01 | 한화에어로스페이스 주식회사 | Method for manufacturing impeller |
US9599120B2 (en) * | 2012-08-24 | 2017-03-21 | Asmo Co., Ltd. | Impeller for centrifugal pump and centrifugal pump of vehicle washer device |
JP6117659B2 (en) * | 2013-09-06 | 2017-04-19 | 本田技研工業株式会社 | Centrifugal pump |
ITUB20150308A1 (en) * | 2015-05-04 | 2016-11-04 | Ebara Corp | IMPELLER STRUCTURE, ESPECIALLY FOR CENTRIFUGAL PUMPS |
DE102016225891A1 (en) * | 2016-12-21 | 2018-06-21 | KSB SE & Co. KGaA | Vortex pump |
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US3362338A (en) * | 1965-01-28 | 1968-01-09 | Armstrong Ltd S A | Impellers for centrifugal pumps |
GB2260788A (en) * | 1991-10-05 | 1993-04-28 | Jaguar Cars | Pump impeller |
DE4139293A1 (en) * | 1991-11-29 | 1993-06-03 | Inst Verbundwerkstoffe Gmbh | Pump impeller and associated composite - has modular construction of box or U=shaped sections with disc faces and mfd. by resin injection, winding or pressing |
US20030002985A1 (en) * | 2001-07-02 | 2003-01-02 | Shu-Chen Tsui | Spiral fluted wheel for a pump |
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US436015A (en) * | 1890-09-09 | Agitator for stuff-chests | ||
US538050A (en) * | 1895-04-23 | Half to isaac l | ||
US1947658A (en) * | 1931-12-17 | 1934-02-20 | Pizzuto Nicolas | Impeller and shaft therefor for use in centrifugal and turbine pumps |
GB1510629A (en) * | 1974-08-08 | 1978-05-10 | Penny Turbines Ltd N | Centrifugal compressor or centripetal turbine |
GB2168764B (en) | 1984-12-22 | 1989-06-07 | Rolls Royce Plc | Centrifugal pump impellers |
DE69212661T2 (en) * | 1991-02-12 | 1997-03-13 | Comadur S A Comadur Ag Comadur | Control device in the form of a mouse |
SE523740C2 (en) * | 2001-08-27 | 2004-05-11 | Aerodyn Ab | Centrifugal pumping device |
US7186332B2 (en) * | 2004-04-30 | 2007-03-06 | Gl&V Management, Hungary Kft | Orbital wastewater treatment system with combined surface aerator and submerged impeller |
-
2009
- 2009-03-09 EP EP09003369A patent/EP2228541B1/en active Active
- 2009-06-24 TW TW098121123A patent/TWI495795B/en active
-
2010
- 2010-03-01 US US12/714,626 patent/US8740569B2/en active Active
- 2010-03-04 CN CN201010128895.9A patent/CN101832291B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US3362338A (en) * | 1965-01-28 | 1968-01-09 | Armstrong Ltd S A | Impellers for centrifugal pumps |
GB2260788A (en) * | 1991-10-05 | 1993-04-28 | Jaguar Cars | Pump impeller |
DE4139293A1 (en) * | 1991-11-29 | 1993-06-03 | Inst Verbundwerkstoffe Gmbh | Pump impeller and associated composite - has modular construction of box or U=shaped sections with disc faces and mfd. by resin injection, winding or pressing |
US20030002985A1 (en) * | 2001-07-02 | 2003-01-02 | Shu-Chen Tsui | Spiral fluted wheel for a pump |
Also Published As
Publication number | Publication date |
---|---|
EP2228541B1 (en) | 2012-11-14 |
US20100226773A1 (en) | 2010-09-09 |
CN101832291A (en) | 2010-09-15 |
US8740569B2 (en) | 2014-06-03 |
CN101832291B (en) | 2015-05-13 |
TWI495795B (en) | 2015-08-11 |
TW201033473A (en) | 2010-09-16 |
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