EP2160513A1 - Hybrid pump for delivering a liquid pump medium - Google Patents

Hybrid pump for delivering a liquid pump medium

Info

Publication number
EP2160513A1
EP2160513A1 EP08785137A EP08785137A EP2160513A1 EP 2160513 A1 EP2160513 A1 EP 2160513A1 EP 08785137 A EP08785137 A EP 08785137A EP 08785137 A EP08785137 A EP 08785137A EP 2160513 A1 EP2160513 A1 EP 2160513A1
Authority
EP
European Patent Office
Prior art keywords
rotor
pump
base plate
pump chamber
hybrid
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
Application number
EP08785137A
Other languages
German (de)
French (fr)
Other versions
EP2160513B1 (en
Inventor
Ralf Diekmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tecalemit GmbH and Co KG
Original Assignee
Horn GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Horn GmbH and Co KG filed Critical Horn GmbH and Co KG
Publication of EP2160513A1 publication Critical patent/EP2160513A1/en
Application granted granted Critical
Publication of EP2160513B1 publication Critical patent/EP2160513B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/40—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C2/08 or F04C2/22 and having a hinged member
    • F04C2/44—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C2/08 or F04C2/22 and having a hinged member with vanes hinged to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/12—Polyetheretherketones, e.g. PEEK

Definitions

  • the invention relates to a hybrid pump for conveying a liquid pumping medium with the features of the preamble of claim 1.
  • a hybrid pump is understood as meaning a pump which operates as a displacement machine in a first operating mode and as a turbomachine in a second operating mode in order to be able to combine the respective advantages of these two types of pump.
  • a known hybrid pump (DE 101 58 146 Al) has a housing which is equipped with an inlet, an outlet and a pump chamber.
  • the pumping chamber has a running surface which is substantially round or round in cross-section for a rotor with rotor blades which can be rotated about a rotor axis, and in each case has a lateral surface on both sides of the rotor.
  • the rotor is arranged eccentrically in the pump chamber, wherein the rotor blades are movable relative to the rotor otherwise.
  • the rotor blades, together with the tread of the pumping space, define a plurality of pumping chambers.
  • the inlet is arranged in the side surface of the pump chamber.
  • the problem with the known hybrid pump is the fact that the filling and emptying of the pumping chambers during pumping is not optimal. For example, it has been proven that the pumping medium is exchanged only to a small extent in that part of the pumping chambers which faces the rotor axis. This has not been significantly improved by the arrangement of the inlet or the outlet in the side surface of the pump chamber. The volume of the pumping chambers is therefore used only insufficiently in pumping operation.
  • the arrangement of the inlet or the outlet in the side surface of the pump chamber is basically connected to a deflection of the pumping medium to about 90 ° depending on the configuration.
  • this leads to the formation of a dead space, which is ignored during the filling of the pump chambers. remains. This leads to insufficient filling of the pump chamber. The resulting efficiency of this pump is low.
  • the above-explained known hybrid pump has already been designed and developed with regard to an improved efficiency (DE 20 2005 007 789 U1), namely by using a rotor which consists of chemically resistant, substantially non-elastic plastic, in particular PEEK and a side surface of the pump chamber associated with a base plate, are fixed to the fixed rotor parts. At the outer end of each fixed rotor part, a curved rotor wing is pivotally articulated. Between adjacent rotor parts and rotor blades, the pumping chambers of the rotor are formed, which are closed to the upper side surface of the pump chamber as previously open, to the lower side surface, however, by the base plate.
  • the design of the rotor is utilized to locate the inlet or outlet in the upper side surface of the pumping space such that the geometric rotor axis passes through the inlet and the outlet, respectively.
  • the flow path of the pumping medium initially runs along the rotor axis and then into the respective pumping chamber. This ensures that a filling of the pumping chambers takes place at least in part from a position which is as close as possible to the rotor axis. The rotor is so to speak penetrated by the pumping medium. The above-described image of a dead space in the pumping chambers can thus be largely avoided. As a result, the quality of the filling of the pump chambers in pumping operation increases.
  • a rotor penetrated by the pumping medium, as it were, of the type described above is not used in all cases in a hybrid pump. bar.
  • the teaching of the present invention is therefore based on the problem of increasing the known pump with the rotor having a base plate in the efficiency, without forming part of the area surrounding the geometric rotor axis hollow.
  • the rotor is suitably made of chemically resistant, substantially non-elastic plastic, in particular made of PEEK.
  • the efficiency is increased in this hybrid pump characterized in that the flow pattern of the liquid pumping medium is made uniform in the pumping chambers. This is achieved in that the bottoms of the pumping chambers a suitably arcuate, a uniform deflection of the flow causing course is given. At the same time, the unused dead spaces in the pumping chambers are reduced. Where previously remain at rather angular course of the pumping chambers remains of the liquid pumping medium, which hindered the uniform flow of the liquid pumping medium, now simply run the bottoms of the pumping chambers.
  • the bottoms of the pump chambers have a superimposed spiral course towards the rotor axis. So they not only rise concave-arc, but also extend in the circumferential direction in turn arcuately from an outer, more tangential section starting on the rotor axis.
  • the base plate of the rotor is designed accordingly adapted. It is usually not a smooth, flat plate, but a contoured in many ways, the corresponding courses in the surface and at the edges providing construction.
  • the stationary rotor parts run in a curved manner in the circumferential direction of the rotor, and that the bottoms of the pumping spaces, as seen in plan view of the rotor, are each curved in the manner of a curve. Run following the adjacent stationary rotor part following radially outward. This then causes the base plate on the outer circumference does not run smoothly circular, but has the individual rotor blades corresponding stages.
  • the hybrid pump according to the invention is designed to realize the most uniform, less turbulent flow conditions on and in the rotor.
  • the movable rotor blades extend into the plane of the base plate, preferably io as far as the bottom, and that the arcuate course of the inside of the rotor blades the arcuate course of the outer edge of the floors corresponds so that the rotor blades come to rest well on the outer edges of the soil.
  • the rotor blades in the hybrid pump according to the invention are so stiff that it is sufficient to provide a guide rail bridging the outlet for the outer edges of the rotor blades.
  • Particularly useful are two guide rails above and below the outlet 5, which then support the rotor blades when passing through the outlet on both sides.
  • the inlet is still left in the upper side surface of the pump chamber in the construction described above, but can arrange the outlet in 0 of the tread of the pump chamber and align tangentially. This leads to a further improvement in the efficiency of the hybrid pump, because a renewed deflection of the liquid flow can be omitted.
  • the hybrid pump according to the invention is operated in operation at speeds of meh-5 reren thousand, preferably about 8,000 U / min.
  • FIG. 1 is a view of the lower part of the housing with the pump chamber and disposed therein rotor
  • Fig. 5 shows the rotor of Fig. 4 in a perspective view, movable
  • Fig. 6 seen the rotor of Fig. 4 in an end view from the rear side.
  • the illustrated embodiment shows a hybrid pump for conveying a liquid pumping medium, ie a pump that can work both as a displacement machine (vane pump) and as a turbomachine (centrifugal pump) due to the construction of the rotor.
  • the hybrid pump has a housing 1, of which one sees in Fig. 1 and 2, the lower part Ia while Fig. 3 shows the upper part Ib, so practically the cover for the lower part 1 a.
  • the housing 1 has a pump chamber 2.
  • In the pump chamber 2 opens an inlet 3, visible in Fig. 3 in the upper part Ib of the housing 1.
  • an axial inlet 3 whose contour is matched to the design of the rotor to be explained below.
  • the pump chamber 2 also has an outlet 4 leading out of the pump chamber 2, which can be seen in FIG.
  • the outlet 4 could, as in the prior art, also be arranged axially.
  • the illustrated and preferred embodiment shows the outlet 4 tangentially from the pump chamber 2, leaving.
  • a rotatable about a rotor axis 5 rotor 6 is arranged.
  • This consists in the illustrated and preferred embodiment of substantially non-elastic plastic.
  • PEEK polyether ether ketone
  • it should be a chemically resistant plastic so that the hybrid pump according to the application in the field of chemical applications can be used without problems.
  • the pump chamber 2 has a cross-sectionally substantially circular or a continuously extending, although somewhat deviating from the circular shape, but still suitable for a rotational movement of the rotor 6 tread 7.
  • the pump chamber 2 On the two sides of the rotor 6, so not on the circumference, the pump chamber 2 each have a side surface 8; 8th'.
  • the rotor 6 is arranged eccentrically with respect to the running surface 7 in the pump chamber 2.
  • the rotor 6 has one of the lower side surface 8 of the pump chamber 2, which is indicated in Fig. 1 and 2, associated base plate 9.
  • the rotor 6 is shown in detail in FIGS. 4 to 6.
  • the base plate 9 is designated in particular in FIGS. 5 and 6.
  • the rotor 6 further comprises a plurality of circumferentially substantially uniformly spaced, with built-rotor 6 to the opposite side surface 8 'of the pump chamber 2, indicated in Fig. 3, extending rotor parts 10, which are fixedly connected to the base plate 9 ,
  • the unit of base plate 9 and rotor parts 10 so to speak represents the main body of the rotor 6.
  • This body is shown in Fig. 5 in a perspective view.
  • a preferably curved rotor blade 11 is pivotally articulated. 4, corresponding parts of the pivot joints 12 can also be seen in FIG. 5.
  • FIGS. 1 and 6 these are likewise to be recognized, but not identified by reference numerals.
  • the pumping chambers 13 of the rotor 6 are formed. These are open to the upper side surface 8 'of the pump chamber 2 and their bottoms 13' are formed by the base plate 9 of the rotor 6.
  • Fig. 5 can be particularly well seen that the bottoms 13 'of the pumping chambers 13 extending from the outer edge of the base plate 9, starting inwardly towards the rotor axis 5 concave-arc rising. It also recognizes the special feature that the bottoms 13 'of the pumping chambers 13 to the rotor axis 5 have a superimposed spiral course, so are twisted in a certain way in the space to the rotor axis 5 out.
  • the illustrated shape of the bottoms 13 'of the pumping chambers 13 leads to the fact that the pumping chambers 13 are completely filled and the pumping medium is completely exchanged in the rotor axis 5 facing parts of the pumping chambers 13. Dead spaces omitted. The flow of the pumping medium in the pumping chambers 13 is as even as possible.
  • the rotor blades 11 are preferably bent.
  • An arcuate design of the rotor blades 11 corresponds to the direction of rotation-related configuration of the rotor 6 as a whole.
  • the advantages of curved rotor blades 11 in FIG. 1 can be seen particularly clearly.
  • the overall arcuate course of the pumping chambers 13 results.
  • the bottoms 13 'of the pumping chambers 13 extend in each case. because arcuately following the course of the adjacent stationary rotor part 10.
  • the base plate 9 on the outer circumference is not approximately circular, but has a step-shaped course. This can be seen particularly well in Fig. 6, which shows the back of the base plate 9.
  • the outlet 4 from the pump chamber 2 in the tread 7 of the pump chamber 2 is arranged.
  • the rotor blades 11 thus sweep when rotating the rotor 6 at high speed, for example, 8000 U / min, constantly the outlet 4.
  • the material of the rotor 6 and its rotor blades 1 1 made of plastic is largely inelastic and torsionally rigid, it results in a Considerable wear of the radially outer ends of the rotor blades 11 in the constant impact on the edges of the outlet. 4
  • At least one guide strip 15 bridging the outlet 4 in the manner of a rail is provided for at least one outer edge of the rotor blade 11.
  • Fig. 2 is the guide bar 15 down to the lower side surface 8 back. It is preferable to position a guide strip above and below the outlet, so that the outer ends of the rotor blades 11 are guided over the outlet 4 in a very uniform manner like a rail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a hybrid pump for delivering a liquid pump medium, comprising a rotor consisting of substantially non-elastic plastic, which is situated in the pump chamber and can rotate about a rotor axis. Said rotor has a base plate associated with the lower lateral surface of the pump chamber and several rotor parts that are spaced substantially at a uniform distance around the periphery, extend towards the opposite lateral surface of the pump chamber and are permanently connected to the base plate. A preferably curved rotor blade is pivotally hinged on the outer end of each rotor part, forming pump chambers of the rotor between neighboring rotor parts and rotor blades, said chambers being open towards the upper lateral surface of the pump chamber and the bases of said chambers being formed by the base plate of the rotor. The pump is characterized in that the bases of the pump chambers follow a concave arc, rising from the outer edge of the base plate inward towards the rotor axis.

Description

Hybridpumpe zum Fördern eines flüssigen Pumpmediums Hybrid pump for conveying a liquid pumping medium
Die Erfindung betrifft eine Hybridpumpe zum Fördern eines flüssigen Pumpmediums mit den Merkmalen des Oberbegriffs von Anspruch 1.The invention relates to a hybrid pump for conveying a liquid pumping medium with the features of the preamble of claim 1.
Unter einer Hybridpumpe wird vorliegend eine Pumpe verstanden, die in einer ersten Betriebsart als Verdrängermaschine und in einer zweiten Betriebsart als Strömungsmaschine arbeitet, um die jeweiligen Vorzüge dieser beiden Pumpenarten miteinander kombinieren zu können.In the present case, a hybrid pump is understood as meaning a pump which operates as a displacement machine in a first operating mode and as a turbomachine in a second operating mode in order to be able to combine the respective advantages of these two types of pump.
Eine bekannte Hybridpumpe (DE 101 58 146 Al) weist ein Gehäuse auf, das mit einem Einlaß, einem Auslaß und einem Pumpraum ausgestattet ist. Der Pump- raum zeigt eine im Querschnitt im wesentlichen runde oder rundliche Lauffläche für einen um eine Rotorachse drehbaren Rotor mit Rotorflügeln und seitlich an beiden Seiten des Rotors jeweils eine Seitenfläche. Der Rotor ist exzentrisch im Pumpraum angeordnet, wobei die Rotorflügel relativ zum Rotor im übrigen jeweils bewegbar sind. Die Rotorflügel definieren zusammen mit der Lauffläche des Pumpraums eine Mehrzahl von Pumpkammern. In einer Ausführungsform ist es vorgesehen, daß jedenfalls der Einlaß in der Seitenfläche des Pumpraums an- geordnet ist.A known hybrid pump (DE 101 58 146 Al) has a housing which is equipped with an inlet, an outlet and a pump chamber. The pumping chamber has a running surface which is substantially round or round in cross-section for a rotor with rotor blades which can be rotated about a rotor axis, and in each case has a lateral surface on both sides of the rotor. The rotor is arranged eccentrically in the pump chamber, wherein the rotor blades are movable relative to the rotor otherwise. The rotor blades, together with the tread of the pumping space, define a plurality of pumping chambers. In one embodiment, it is provided that in any case the inlet is arranged in the side surface of the pump chamber.
Problematisch ist bei der bekannten Hybridpumpe die Tatsache, daß das Befullen und das Entleeren der Pumpkammern im Pumpbetrieb nicht optimal ist. Es konnte beispielsweise nachgewiesen werden, daß das Pumpmedium in dem der Ro- torachse zugewandten Teil der Pumpkammern in nur geringem Maße ausgetauscht wird. Dies hat sich auch durch die Anordnung des Einlasses oder des Auslasses in der Seitenfläche des Pumpraums nicht wesentlich verbessert. Das Volumen der Pumpkammern wird damit im Pumpbetrieb nur unzureichend genutzt.The problem with the known hybrid pump is the fact that the filling and emptying of the pumping chambers during pumping is not optimal. For example, it has been proven that the pumping medium is exchanged only to a small extent in that part of the pumping chambers which faces the rotor axis. This has not been significantly improved by the arrangement of the inlet or the outlet in the side surface of the pump chamber. The volume of the pumping chambers is therefore used only insufficiently in pumping operation.
Ferner ist zu berücksichtigen, daß die Anordnung des Einlasses oder des Auslasses in der Seitenfläche des Pumpraums grundsätzlich mit einer Umlenkung des Pumpmediums um je nach Ausgestaltung etwa 90° verbunden ist. Dies führt jedenfalls in dem der Rotorachse zugewandten Teil der Pumpkammern jeweils zur Bildung eines Totraums, der bei der Befüllung der Pumpkammern unberücksich- tigt bleibt. Dies führt zu einer unzureichenden Befüllung der Pumpkammem. Der resultierende Wirkungsgrad dieser Pumpe ist gering.It should also be noted that the arrangement of the inlet or the outlet in the side surface of the pump chamber is basically connected to a deflection of the pumping medium to about 90 ° depending on the configuration. In any case, in the part of the pump chambers facing the rotor axis, this leads to the formation of a dead space, which is ignored during the filling of the pump chambers. remains. This leads to insufficient filling of the pump chamber. The resulting efficiency of this pump is low.
Die zuvor erläuterte, bekannte Hybridpumpe ist bereits hinsichtlich eines verbes- serten Wirkungsgrades ausgestaltet und weitergebildet worden (DE 20 2005 007 789 Ul), und zwar durch Nutzung eines Rotors, der aus chemisch beständigem, im wesentlichen nicht elastischen Kunststoff, insbesondere aus PEEK, besteht und einer Seitenfläche des Pumpraums zugeordnet eine Grundplatte aufweist, an der feststehende Rotorteile fest angebracht sind. Am äußeren Ende jedes festste- henden Rotorteils ist ein gebogener Rotorflügel schwenkbar angelenkt. Zwischen benachbarten Rotorteilen und Rotorflügeln sind die Pumpkammern des Rotors ausgebildet, die zur oberen Seitenfläche des Pumpraums wie bisher offen, zur unteren Seitenfläche hin jedoch durch die Grundplatte geschlossen sind.The above-explained known hybrid pump has already been designed and developed with regard to an improved efficiency (DE 20 2005 007 789 U1), namely by using a rotor which consists of chemically resistant, substantially non-elastic plastic, in particular PEEK and a side surface of the pump chamber associated with a base plate, are fixed to the fixed rotor parts. At the outer end of each fixed rotor part, a curved rotor wing is pivotally articulated. Between adjacent rotor parts and rotor blades, the pumping chambers of the rotor are formed, which are closed to the upper side surface of the pump chamber as previously open, to the lower side surface, however, by the base plate.
Bei dem zuvor erläuterten Stand der Technik, von dem die Erfindung ausgeht, wird die Konstruktion des Rotors dazu genutzt, den Einlaß oder den Auslaß derart in der oberen Seitenfläche des Pumpraums anzuordnen, daß die geometrische Rotorachse durch den Einlaß bzw. den Auslaß verläuft.In the prior art discussed above, of which the invention is based, the design of the rotor is utilized to locate the inlet or outlet in the upper side surface of the pumping space such that the geometric rotor axis passes through the inlet and the outlet, respectively.
Der Strömungsweg des Pumpmediums verläuft zunächst entlang der Rotorachse und anschließend in die jeweilige Pumpkammer. Dadurch wird erreicht, daß eine Befüllung der Pumpkammern zumindest zum Teil von einer Position aus erfolgt, die der Rotorachse so nahe wie überhaupt möglich ist. Der Rotor wird also gewissermaßen von dem Pumpmedium durchdrungen. Die oben beschriebene BiI- düng eines Totraums in den Pumpkammern läßt sich dadurch weitgehend vermeiden. Im Ergebnis steigt die Qualität der Befüllung der Pumpkammern im Pumpbetrieb.The flow path of the pumping medium initially runs along the rotor axis and then into the respective pumping chamber. This ensures that a filling of the pumping chambers takes place at least in part from a position which is as close as possible to the rotor axis. The rotor is so to speak penetrated by the pumping medium. The above-described image of a dead space in the pumping chambers can thus be largely avoided. As a result, the quality of the filling of the pump chambers in pumping operation increases.
Konstruktiv ist es bei der vorschlagsgemäßen Lösung erforderlich, zumindest über einen Teil der Rotorachse einen Teil des die Rotorachse umgebenden Bereichs hohl auszugestalten, um diesen Bereich als Einlaß nutzen zu können. Hierfür sind eine Reihe von konstruktiven Möglichkeiten denkbar, wobei zu berücksichtigen ist, daß ein Kurzschluß zwischen Einlaß und Auslaß zu vermeiden ist.Constructively, it is necessary in the proposed solution, at least over a part of the rotor axis to design a part of the area surrounding the rotor axis hollow in order to use this area as an inlet can. For this purpose, a number of design options are conceivable, taking into account that a short circuit between the inlet and outlet is to be avoided.
Ein gewissermaßen von dem Pumpmedium durchdrungener Rotor der zuvor beschriebenen Art ist bei einer Hybridpumpe nicht unter allen Umständen einsetz- bar. Der Lehre der vorliegenden Erfindung liegt daher das Problem zugrunde, die bekannte Pumpe mit dem eine Grundplatte aufweisenden Rotor im Wirkungsgrad zu erhöhen, ohne einen Teil des die geometrische Rotorachse umgebenden Bereichs hohl auszugestalten.A rotor penetrated by the pumping medium, as it were, of the type described above is not used in all cases in a hybrid pump. bar. The teaching of the present invention is therefore based on the problem of increasing the known pump with the rotor having a base plate in the efficiency, without forming part of the area surrounding the geometric rotor axis hollow.
Die zuvor aufgezeigte Problemstellung ist bei der Hybridpumpe mit den Merkmalen des Oberbegriffs von Anspruch 1 durch die Merkmale des kennzeichnenden Teils von Anspruch 1 gelöst.The above-indicated problem is solved in the hybrid pump with the features of the preamble of claim 1 by the features of the characterizing part of claim 1.
Wie bisher ist der Rotor zweckmäßig aus chemisch beständigem, im wesentlichen nicht elastischen Kunststoff, insbesondere aus PEEK, ausgebildet. Der Wirkungsgrad wird bei dieser Hybridpumpe dadurch erhöht, daß der Strömungsverlauf des flüssigen Pumpmediums in den Pumpkammern vergleichmäßigt wird. Das wird dadurch erreicht, daß den Böden der Pumpkammern ein passend bogenförmiger, eine gleichmäßige Umlenkung der Strömung bewirkender Verlauf gegeben wird. Gleichzeitig werden die nicht genutzten Toträume in den Pumpkammern verringert. Dort wo bisher bei eher winkelförmigem Verlauf der Pumpkammern Reste des flüssigen Pumpmediums verblieben, die die gleichmäßige Strömung des flüssigen Pumpmediums behinderten, verlaufen jetzt einfach die Böden der Pumpkammern.As before, the rotor is suitably made of chemically resistant, substantially non-elastic plastic, in particular made of PEEK. The efficiency is increased in this hybrid pump characterized in that the flow pattern of the liquid pumping medium is made uniform in the pumping chambers. This is achieved in that the bottoms of the pumping chambers a suitably arcuate, a uniform deflection of the flow causing course is given. At the same time, the unused dead spaces in the pumping chambers are reduced. Where previously remain at rather angular course of the pumping chambers remains of the liquid pumping medium, which hindered the uniform flow of the liquid pumping medium, now simply run the bottoms of the pumping chambers.
Da der Rotor der erfindungsgemäßen Hybridpumpe bezogen auf die betriebliche Drehrichtung asymmetrisch gestaltet ist, empfiehlt es sich ferner, daß die Böden der Pumpräume zur Rotorachse hin einen überlagerten spiralförmigen Verlauf aufweisen. Sie steigen also nicht nur konkav-bogenförmig an, sondern verlaufen auch in Umfangsrichtung wiederum bogenförmig von einem äußeren, eher tangential verlaufenden Abschnitt ausgehend auf die Rotorachse zu.Since the rotor of the hybrid pump according to the invention is designed asymmetrically with respect to the operating direction of rotation, it is also recommended that the bottoms of the pump chambers have a superimposed spiral course towards the rotor axis. So they not only rise concave-arc, but also extend in the circumferential direction in turn arcuately from an outer, more tangential section starting on the rotor axis.
Die Grundplatte des Rotors ist entsprechend angepaßt gestaltet. Es handelt sich regelmäßig nicht um eine glatte, ebene Platte, sondern um eine in vielfältiger Weise konturierte, die entsprechenden Verläufe in der Fläche und an den Rändern bereitstellende Konstruktion.The base plate of the rotor is designed accordingly adapted. It is usually not a smooth, flat plate, but a contoured in many ways, the corresponding courses in the surface and at the edges providing construction.
Nach besonders bevorzugter Lehre ist vorgesehen, daß die feststehenden Rotor- teile in Umfangsrichtung des Rotors gebogen verlaufen und daß in Draufsicht auf den Rotor gesehen die Böden der Pumpräume jeweils bogenförmig dem Ver- lauf des benachbarten feststehenden Rotorteils folgend radial nach außen verlaufen. Das führt dann dazu, daß die Grundplatte am Außenumfang nicht glatt kreisförmig verläuft, sondern den einzelnen Rotorflügeln entsprechende Stufen aufweist.According to a particularly preferred teaching, it is provided that the stationary rotor parts run in a curved manner in the circumferential direction of the rotor, and that the bottoms of the pumping spaces, as seen in plan view of the rotor, are each curved in the manner of a curve. Run following the adjacent stationary rotor part following radially outward. This then causes the base plate on the outer circumference does not run smoothly circular, but has the individual rotor blades corresponding stages.
55
Insgesamt ist die erfindungsgemäße Hybridpumpe darauf ausgerichtet, möglichst gleichmäßige, wenig turbulente Strömungsverhältnisse am und im Rotor zu realisieren. Dazu empfiehlt es sich nach weiter bevorzugter Lehre der Erfindung, daß die beweglichen Rotorflügel sich bis in die Ebene der Grundplatte, vorzugs- i o weise genau bis zu deren Unterseite, erstrecken und daß der bogenförmige Verlauf der Innenseite der Rotorflügel dem bogenförmigen Verlauf des Außenrandes der Böden entspricht, so daß die Rotorflügel an den Außenrändern der Böden gut zur Anlage kommen.Overall, the hybrid pump according to the invention is designed to realize the most uniform, less turbulent flow conditions on and in the rotor. For this purpose, it is recommended according to further preferred teaching of the invention that the movable rotor blades extend into the plane of the base plate, preferably io as far as the bottom, and that the arcuate course of the inside of the rotor blades the arcuate course of the outer edge of the floors corresponds so that the rotor blades come to rest well on the outer edges of the soil.
15 Bei der erfindungsgemäßen Hybridpumpe mit den aus im wesentlichen nicht elastischem Kunststoff, insbesondere aus PEEK, bestehenden Rotorflügeln am entsprechend gestalteten Rotor empfiehlt es sich, für die Rotorflügel am in der Lauffläche des Pumpraums befindlichen Auslaß eine Führung zu realisieren. Dadurch wird verhindert, daß die Rotorflügel beim Passieren des in der Lauffläche 0 des Pumpraumes befindlichen Auslaß in den Auslaß hineingedrückt und verformt werden. Dank der Materialwahl für den Rotor sind die Rotorflügel bei der erfϊndungsgemäßen Hybridpumpe so steif, daß es ausreicht, eine den Auslaß schienenartig überbrückende Führungsleiste für die Außenränder der Rotorflügel vorzusehen. Besonders zweckmäßig sind zwei Führungsleisten oberhalb und un- 5 terhalb des Auslasses, die die Rotorflügel dann beim Passieren des Auslasses beidseits abstützen.In the hybrid pump according to the invention with the essentially non-elastic plastic, in particular made of PEEK, existing rotor blades on appropriately designed rotor, it is advisable to realize for the rotor blades at the outlet located in the running surface of the pump chamber a guide. This prevents that the rotor blades are pressed and deformed when passing the outlet located in the running surface 0 of the pumping space in the outlet. Thanks to the choice of material for the rotor, the rotor blades in the hybrid pump according to the invention are so stiff that it is sufficient to provide a guide rail bridging the outlet for the outer edges of the rotor blades. Particularly useful are two guide rails above and below the outlet 5, which then support the rotor blades when passing through the outlet on both sides.
Insgesamt wird man bei der zuvor erläuterten Konstruktion den Einlaß nach wie vor in der oberen Seitenfläche des Pumpraums belassen, kann den Auslaß aber in 0 der Lauffläche des Pumpraums anordnen und tangential ausrichten. Das führt zu einer weiteren Verbesserung des Wirkungsgrades der Hybridpumpe, weil eine erneute Umlenkung des Flüssigkeitsstroms unterbleiben kann.Overall, the inlet is still left in the upper side surface of the pump chamber in the construction described above, but can arrange the outlet in 0 of the tread of the pump chamber and align tangentially. This leads to a further improvement in the efficiency of the hybrid pump, because a renewed deflection of the liquid flow can be omitted.
Die erfindungsgemäße Hybridpumpe wird im Betrieb mit Drehzahlen von meh-5 reren tausend, vorzugsweise etwa 8.000 U/min betrieben. Im folgenden wird nun die Erfindung anhand der Zeichnung unter Bezugnahme auf ein bevorzugtes Ausführungsbeispiel näher erläutert. Im Zuge dieser Erläuterung werden weitere Ausgestaltungen und Weiterbildungen sowie weitere Merkmale, Eigenschaften, Aspekte und Vorteile der Erfindung erläutert. In der Zeichnung zeigtThe hybrid pump according to the invention is operated in operation at speeds of meh-5 reren thousand, preferably about 8,000 U / min. In the following the invention will now be explained in more detail with reference to the drawing with reference to a preferred embodiment. In the course of this explanation, further refinements and developments as well as further features, features, aspects and advantages of the invention will be explained. In the drawing shows
Fig. 1 in einer Ansicht den unteren Teil des Gehäuses mit dem Pumpraum und darin angeordnetem Rotor,1 is a view of the lower part of the housing with the pump chamber and disposed therein rotor,
Fig. 2 im Schnitt den unteren Teil des Gehäuses gemäß Fig. 1,2 shows in section the lower part of the housing according to FIG. 1,
Fig. 3 in einer Ansicht von der Seite des Pumpraums her den oberen Teil des Gehäuses (Deckel),3 in a view from the side of the pump chamber ago the upper part of the housing (cover),
Fig. 4 in einer Stirnansicht einen Rotor einer erfindungsgemäßen Hybridpumpe,4 shows an end view of a rotor of a hybrid pump according to the invention,
Fig. 5 den Rotor aus Fig. 4 in einer perspektivischen Ansicht, beweglicheFig. 5 shows the rotor of Fig. 4 in a perspective view, movable
Rotorflügel demontiert, undRotor blades dismantled, and
Fig. 6 den Rotor aus Fig. 4 in einer Stirnansicht von der Rückseite aus gesehen.Fig. 6 seen the rotor of Fig. 4 in an end view from the rear side.
Das dargestellte Ausfuhrungsbeispiel zeigt eine Hybridpumpe zum Fördern eines flüssiges Pumpmediums, also eine Pumpe, die aufgrund der Konstruktion des Rotors sowohl als Verdrängermaschine (Flügelzellenpumpe) als auch als Strömungsmaschine (Kreiselpumpe) arbeiten kann.The illustrated embodiment shows a hybrid pump for conveying a liquid pumping medium, ie a pump that can work both as a displacement machine (vane pump) and as a turbomachine (centrifugal pump) due to the construction of the rotor.
Die Hybridpumpe hat ein Gehäuse 1, von dem man in Fig. 1 und 2 das Unterteil Ia sieht während Fig. 3 das Oberteil Ib, also praktisch den Deckel für das Unterteil 1 a zeigt. Das Gehäuse 1 weist einen Pumpraum 2 auf. In den Pumpraum 2 mündet ein Einlaß 3, zu erkennen in Fig. 3 im Oberteil Ib des Gehäuses 1. Hier haben wir es also mit einem axialen Einlaß 3 zu tun, dessen Kontur auf die Gestaltung des weiter unten zu erläuternden Rotors abgestimmt ist. Der Pumpraum 2 weist ferner einen aus dem Pumpraum 2 herausfuhrenden Auslaß 4 auf, der in Fig. 2 zu erkennen ist. Der Auslaß 4 könnte, wie im Stand der Technik, ebenfalls axial angeordnet sein. Das dargestellte und bevorzugte Ausführungsbeispiel zeigt jedoch den Auslaß 4 tangential vom Pumpraum 2 abge- hend. Die damit verbundenen Vorteile werden weiter unten noch erläutert.The hybrid pump has a housing 1, of which one sees in Fig. 1 and 2, the lower part Ia while Fig. 3 shows the upper part Ib, so practically the cover for the lower part 1 a. The housing 1 has a pump chamber 2. In the pump chamber 2 opens an inlet 3, visible in Fig. 3 in the upper part Ib of the housing 1. Here we have it to do with an axial inlet 3, whose contour is matched to the design of the rotor to be explained below. The pump chamber 2 also has an outlet 4 leading out of the pump chamber 2, which can be seen in FIG. The outlet 4 could, as in the prior art, also be arranged axially. However, the illustrated and preferred embodiment shows the outlet 4 tangentially from the pump chamber 2, leaving. The associated advantages will be explained below.
In dem Pumpraum 2 ist ein um eine Rotorachse 5 drehbarer Rotor 6 angeordnet. Dieser besteht im dargestellten und bevorzugten Ausfuhrungsbeispiel aus im wesentlichen nicht elastischem Kunststoff. Insbesondere kommt PEEK (Polyether- etherketon) in Frage. Insbesondere sollte es sich um einen chemisch beständigen Kunststoff handeln, damit die anmeldungsgemäße Hybridpumpe im Bereich chemischer Anwendungen problemlos eingesetzt werden kann.In the pump chamber 2, a rotatable about a rotor axis 5 rotor 6 is arranged. This consists in the illustrated and preferred embodiment of substantially non-elastic plastic. In particular, PEEK (polyether ether ketone) comes into question. In particular, it should be a chemically resistant plastic so that the hybrid pump according to the application in the field of chemical applications can be used without problems.
Für die beabsichtigte Funktionsweise ist es zweckmäßig, daß der Pumpraum 2 eine im Querschnitt im wesentlichen kreisrunde oder eine stetig verlaufende, zwar etwas von der Kreisform abweichende, aber immer noch zu einer Rotationsbewegung des Rotors 6 passende Lauffläche 7 aufweist. An den beiden Seiten des Rotors 6, also nicht an dessen Umfang, hat der Pumpraum 2 jeweils eine Seitenfläche 8; 8'.For the intended operation, it is expedient that the pump chamber 2 has a cross-sectionally substantially circular or a continuously extending, although somewhat deviating from the circular shape, but still suitable for a rotational movement of the rotor 6 tread 7. On the two sides of the rotor 6, so not on the circumference, the pump chamber 2 each have a side surface 8; 8th'.
Um die Funktion als Verdrängermaschine ausüben zu können, ist der Rotor 6 bezogen auf die Lauffläche 7 exzentrisch im Pumpraum 2 angeordnet. Dabei weist der Rotor 6 einen der unteren Seitenfläche 8 des Pumpraums 2, die in Fig. 1 und 2 angedeutet ist, zugeordnete Grundplatte 9 auf. Der Rotor 6 ist in den Fig. 4 bis 6 im einzelnen dargestellt. Die Grundplatte 9 ist insbesondere in Fig. 5 und 6 bezeichnet.In order to perform the function as a displacement machine, the rotor 6 is arranged eccentrically with respect to the running surface 7 in the pump chamber 2. In this case, the rotor 6 has one of the lower side surface 8 of the pump chamber 2, which is indicated in Fig. 1 and 2, associated base plate 9. The rotor 6 is shown in detail in FIGS. 4 to 6. The base plate 9 is designated in particular in FIGS. 5 and 6.
Der Rotor 6 weist ferner mehrere, in Umfangsrichtung im wesentlichen gleichmäßig beabstandet angeordnete, sich bei eingebautem Rotor 6 zur gegenüberlie- genden Seitenfläche 8' des Pumpraums 2, angedeutet in Fig. 3, erstreckende Rotorteile 10 auf, die mit der Grundplatte 9 fest verbunden sind. Die Einheit aus Grundplatte 9 und Rotorteilen 10 stellt also gewissermaßen den Grundkörper des Rotors 6 dar. Dieser Grundkörper ist in Fig. 5 in perspektivischer Ansicht dargestellt. Am äußeren Ende jedes Rotorteils 10 ist ein vorzugsweise gebogener Rotorflügel 11 schwenkbar angelenkt. Man sieht die Schwenkgelenke 12 für die Rotorflügel 11 in Fig. 4, entsprechende Teile der Schwenkgelenke 12 auch in Fig. 5. In Fig. 1 und 6 sind diese ebenfalls zu erkennen, aber nicht mit Bezugszeichen identifi- ziert.The rotor 6 further comprises a plurality of circumferentially substantially uniformly spaced, with built-rotor 6 to the opposite side surface 8 'of the pump chamber 2, indicated in Fig. 3, extending rotor parts 10, which are fixedly connected to the base plate 9 , The unit of base plate 9 and rotor parts 10 so to speak represents the main body of the rotor 6. This body is shown in Fig. 5 in a perspective view. At the outer end of each rotor part 10, a preferably curved rotor blade 11 is pivotally articulated. 4, corresponding parts of the pivot joints 12 can also be seen in FIG. 5. In FIGS. 1 and 6, these are likewise to be recognized, but not identified by reference numerals.
Man erkennt in Fig. 1 die unterschiedliche, durch die Rotation des Rotors 6 im Pumpraum 2 erzeugte Lage der Rotorflügel 1 1, die zu der gewünschten Pumpwirkung rührt.It can be seen in Fig. 1, the different, generated by the rotation of the rotor 6 in the pump chamber 2 position of the rotor blades 1 1, which stirs to the desired pumping action.
Zwischen benachbarten Rotorteilen 10 und Rotorflügeln 11 sind die Pumpkammern 13 des Rotors 6 ausgebildet. Diese sind zur oberen Seitenfläche 8' des Pumpraums 2 hin offen und deren Böden 13' werden durch die Grundplatte 9 des Rotors 6 gebildet.Between adjacent rotor parts 10 and rotor blades 11, the pumping chambers 13 of the rotor 6 are formed. These are open to the upper side surface 8 'of the pump chamber 2 and their bottoms 13' are formed by the base plate 9 of the rotor 6.
Fig. 5 läßt besonders gut erkennen, daß die Böden 13' der Pumpkammern 13 vom äußeren Rand der Grundplatte 9 ausgehend nach innen zur Rotorachse 5 hin konkav-bogenförmig ansteigend verlaufen. Man erkennt dabei ferner die Besonderheit, daß die Böden 13' der Pumpkammern 13 zur Rotorachse 5 hin einen überlagerten spiralförmigen Verlauf aufweisen, also in gewisser Weise im Raum zur Rotorachse 5 hin tordiert sind.Fig. 5 can be particularly well seen that the bottoms 13 'of the pumping chambers 13 extending from the outer edge of the base plate 9, starting inwardly towards the rotor axis 5 concave-arc rising. It also recognizes the special feature that the bottoms 13 'of the pumping chambers 13 to the rotor axis 5 have a superimposed spiral course, so are twisted in a certain way in the space to the rotor axis 5 out.
Die dargestellte Form der Böden 13' der Pumpkammern 13 fuhrt dazu, daß die Pumpkammern 13 vollständig gefüllt werden und das Pumpmedium auch in den der Rotorachse 5 zugewandten Teilen der Pumpkammern 13 vollständig ausgetauscht wird. Toträume entfallen. Die Strömung des Pumpmediums in den Pumpkammern 13 ist so gleichmäßig wie möglich.The illustrated shape of the bottoms 13 'of the pumping chambers 13 leads to the fact that the pumping chambers 13 are completely filled and the pumping medium is completely exchanged in the rotor axis 5 facing parts of the pumping chambers 13. Dead spaces omitted. The flow of the pumping medium in the pumping chambers 13 is as even as possible.
Bereits zuvor ist darauf hingewiesen worden, daß die Rotorflügel 11 vorzugs- weise gebogen ausgeführt sind. Eine bogenförmige Ausführung der Rotorflügel 11 entspricht der drehrichtungsbezogenen Ausgestaltung des Rotors 6 insgesamt. Man erkennt die Vorteile gebogener Rotorflügel 11 in Fig. 1 ganz besonders deutlich. Insbesondere ist dabei vorgesehen, daß auch bereits die feststehenden Rotorteile 10 in Umfangsrichtung des Rotors 6 gebogen verlaufen. Dadurch er- gibt sich der insgesamt bogenförmige Verlauf der Pumpkammern 13. In Draufsicht auf den Rotor 6 gesehen verlaufen die Böden 13' der Pumpkammern 13 je- weils bogenförmig dem Verlauf des benachbarten feststehenden Rotorteils 10 folgend.It has already been pointed out that the rotor blades 11 are preferably bent. An arcuate design of the rotor blades 11 corresponds to the direction of rotation-related configuration of the rotor 6 as a whole. The advantages of curved rotor blades 11 in FIG. 1 can be seen particularly clearly. In particular, it is provided that even the fixed rotor parts 10 are curved in the circumferential direction of the rotor 6. As a result, the overall arcuate course of the pumping chambers 13 results. When seen in plan view of the rotor 6, the bottoms 13 'of the pumping chambers 13 extend in each case. because arcuately following the course of the adjacent stationary rotor part 10.
Durch die drehrichtungsbezogene Asymmetrie des Rotors 6 ergibt sich, daß im dargestellten und bevorzugten Ausführungsbeispiel die Grundplatte 9 am Außenumfang nicht etwa kreisringförmig verläuft, sondern einen stufenförmigen Verlauf aufweist. Man erkennt dies besonders gut in Fig. 6, die die Rückseite der Grundplatte 9 zeigt.Due to the rotational direction-related asymmetry of the rotor 6 shows that in the illustrated and preferred embodiment, the base plate 9 on the outer circumference is not approximately circular, but has a step-shaped course. This can be seen particularly well in Fig. 6, which shows the back of the base plate 9.
Aus Fig. 5 und Fig. 6 im Zusammenhang läßt sich entnehmen, daß im dargestellten und bevorzugten Ausfiihrungsbeispiel die beweglichen Rotorflügel 11 sich bis in die Ebene der Grundplatte 9 erstrecken, und zwar vorzugsweise genau bis zu deren Unterseite. Der bogenförmige Verlauf der Innenseite der Rotorflügel 11 ist an den bogenförmigen Verlauf des Außenrandes der Böden 13' angepaßt, so daß die Rotorflügel 11 an den Außenrändern 14 der Böden 13" gut zur Anlage kommen. Das sieht man besonders gut in Fig. 4 und Fig. 6. Diese Konstruktion schafft bei anliegenden Rotorflügeln 1 1 praktisch nach unten geschlossene Pumpkammern 13.From Fig. 5 and Fig. 6 in connection can be seen that in the illustrated and preferred Ausfiihrungsbeispiel the movable rotor blades 11 extend into the plane of the base plate 9, and preferably exactly to the bottom. The arcuate course of the inside of the rotor blades 11 is adapted to the arcuate course of the outer edge of the bottoms 13 ', so that the rotor blades 11 come into good contact with the outer edges 14 of the bottoms 13. This is particularly evident in FIGS 6. This design provides for adjacent rotor blades 1 1 practically closed down pump chambers 13th
Fig. 1 und 2 lassen im Zusammenhang erkennen, daß im dargestellten und bevorzugten Ausfuhrungsbeispiel, wie bereits einleitend erwähnt, der Auslaß 4 aus dem Pumpraum 2 in der Lauffläche 7 des Pumpraums 2 angeordnet ist. Die Rotorflügel 11 überstreichen also beim Rotieren des Rotors 6 mit hoher Drehzahl, beispielsweise 8000 U/min, dauernd den Auslaß 4. Auch wenn das Material des Rotors 6 und seiner Rotorflügel 1 1 aus Kunststoff weitgehend unelastisch und verwindungssteif ist, so ergibt sich doch ein beachtlicher Verschleiß der radial außen liegenden Enden der Rotorflügel 11 beim beständigen Aufschlagen auf die Ränder des Auslasses 4.1 and 2 can be seen in connection that in the illustrated and preferred embodiment, as already mentioned in the introduction, the outlet 4 from the pump chamber 2 in the tread 7 of the pump chamber 2 is arranged. The rotor blades 11 thus sweep when rotating the rotor 6 at high speed, for example, 8000 U / min, constantly the outlet 4. Although the material of the rotor 6 and its rotor blades 1 1 made of plastic is largely inelastic and torsionally rigid, it results in a Considerable wear of the radially outer ends of the rotor blades 11 in the constant impact on the edges of the outlet. 4
Erfmdungsgemäß ist hier nun vorgesehen, daß mindestens eine den Auslaß 4 schienenartig überbrückende Führungsleiste 15 für mindestens einen Außenrand der Rotorflügel 11 vorgesehen ist. In Fig. 2 ist das die Führungsleiste 15 unten zur unteren Seitenfläche 8 hin. Vorzugsweise positioniert man je eine Führungsleiste oberhalb und unterhalb des Auslasses, so daß die äußeren Enden der Rotor- flügel 11 ganz gleichmäßig schienenartig über den Auslaß 4 hinweggeführt werden. According to the invention, it is now provided that at least one guide strip 15 bridging the outlet 4 in the manner of a rail is provided for at least one outer edge of the rotor blade 11. In Fig. 2 is the guide bar 15 down to the lower side surface 8 back. It is preferable to position a guide strip above and below the outlet, so that the outer ends of the rotor blades 11 are guided over the outlet 4 in a very uniform manner like a rail.

Claims

Patentansprüche: claims:
1. Hybridpumpe zum Fördern eines flüssigen Pumpmediums mit einem Gehäuse (1), das einen Pumpraum (2) sowie einen in den Pumpraum (2) mündenden Einlaß (3) und einen aus dem Pumpraum (2) führenden Auslaß (4) aufweist, und mit einem in dem Pumpraum (2) angeordneten, um eine Rotorachse (5) drehbaren Rotor (6), aus im wesentlichen nicht elastischem, vorzugsweise chemisch be- ständigem Kunststoff, insbesondere PEEK, wobei der Pumpraum (2) eine im Querschnitt im wesentlichen kreisrunde oder rundliche Lauffläche (7) und seitlich an beiden Seiten des Rotors (6) jeweils eine Seitenfläche (8; 81) aufweist, wobei der Rotor (6) bezogen auf die Lauffläche (7) exzentrisch im Pumpraum (2) angeordnet ist, wobei der Rotor (6) eine der unteren Seitenfläche (8) des Pumpraums (2) zugeordnete Grundplatte (9) und mehrere, in Umfangsrichtung im wesentlichen gleichmäßig beabstandet angeordnete, sich zur gegenüberliegenden Seitenfläche (8') des Pumpraums (2) erstreckende, mit der Grundplatte (9), fest verbundenen Rotorteile (10) aufweist, wobei am äußeren Ende jedes Rotorteils (10) ein vorzugsweise gebogener Rotorflügel (11) schwenkbar angelenkt ist und wobei zwischen benachbarten Rotorteilen (10) und Rotorflügeln (11) Pumpkammern (13) des Rotors (6) ausgebildet sind, die zur oberen Seitenfläche (8') des Pumpraums (2) hin offen sind und deren Böden (13') durch die Grundplatte (9) des Rotors (6) gebildet werden, dadurch gekennzeichnet, daß die Böden (13') der Pumpkammern (13) vom äußeren Rand der Grundplatte (9) ausgehend nach innen zur Rotorachse (5) hin konkav-bogenförmig anstei- gend verlaufen.1. A hybrid pump for conveying a liquid pumping medium having a housing (1) having a pump space (2) and an opening into the pump chamber (2) inlet (3) and one of the pump chamber (2) leading outlet (4), and with a rotor (6), which is arranged in the pump space (2) and rotatable about a rotor axis (5), of substantially non-elastic, preferably chemically resistant, plastic, in particular PEEK, the pump space (2) being substantially circular in cross-section or rounded tread (7) and laterally on both sides of the rotor (6) each have a side surface (8; 8 1 ), wherein the rotor (6) with respect to the running surface (7) eccentrically in the pump chamber (2) is arranged the rotor (6) has a base plate (9) associated with the lower side surface (8) of the pump chamber (2) and a plurality of circumferentially substantially evenly spaced ones extending towards the opposite side surface (8 ') of the pump chamber (2) Base plate ( 9), firmly connected rotor parts (10), wherein at the outer end of each rotor part (10) a preferably curved rotor wing (11) is pivotally articulated and between adjacent rotor parts (10) and rotor blades (11) pumping chambers (13) of the rotor ( 6) are formed, which are open to the upper side surface (8 ') of the pump chamber (2) and whose bottoms (13') through the base plate (9) of the rotor (6) are formed, characterized in that the bottoms (13 ') of the pumping chambers (13) run starting from the outer edge of the base plate (9) inwardly towards the rotor axis (5) in a concave-arc-shaped manner.
2. Hybridpumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Böden (131) der Pumpkammern (13) zur Rotorachse (5) hin einen überlagerten spiralförmigen Verlauf aufweisen. 2. Hybrid pump according to claim 1, characterized in that the bottoms (13 1 ) of the pumping chambers (13) to the rotor axis (5) have a superimposed spiral course.
3. Hybridpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die feststehenden Rotorteile (10) in Umfangsrichtung des Rotors (6) gebogen verlaufen und daß in Draufsicht auf den Rotor (6) gesehen die Böden (13') der Pumpkammern (13) jeweils bogenförmig dem Verlauf des benachbarten feststehenden Rotorteils (10) folgend radial nach außen verlaufen.3. Hybrid pump according to claim 1 or 2, characterized in that the fixed rotor parts (10) extend in the circumferential direction of the rotor (6) bent and that seen in plan view of the rotor (6), the bottoms (13 ') of the pumping chambers (13) each arcuately follow the course of the adjacent stationary rotor part (10) radially outward.
4. Hybridpumpe nach Anspruch 3, dadurch gekennzeichnet, daß die Grundplatte (9) am Außenumfang einen stufenförmigen Verlauf aufweist.4. Hybrid pump according to claim 3, characterized in that the base plate (9) has a stepped course on the outer circumference.
5. Hybridpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die beweglichen Rotorflügel (11) sich bis in die Ebene der Grundplatte (9), vorzugsweise genau bis zu deren Unterseite, erstrecken und daß der bogenförmige Verlauf der Innenseite der Rotorflügel (1 1) dem bogenförmigen Verlauf des Außenrandes der Böden (13') entspricht, so daß die Rotorflügel (11) an den Außenrändern (14) der Böden (13') gut zur Anlage kommen.5. Hybrid pump according to one of claims 1 to 4, characterized in that the movable rotor blades (11) extend into the plane of the base plate (9), preferably exactly to the bottom, and that the arcuate course of the inside of the rotor blades (11 1 1) corresponds to the arcuate course of the outer edge of the bottoms (13 '), so that the rotor vanes (11) come to rest well against the outer edges (14) of the bottoms (13').
6. Hybridpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Auslaß (4) in der Lauffläche (7) des Pumpraums (2) angeordnet ist und daß mindestens eine den Auslaß (4) schienenartig überbrückende Führungsleiste (15) für mindestens einen Außenrand der Rotorflügel (11) vorgesehen ist, wobei vorzugsweise oberhalb und unterhalb des Auslasses (4) je eine Führungsleiste vorgesehen ist. 6. Hybrid pump according to one of claims 1 to 5, characterized in that the outlet (4) in the running surface (7) of the pump chamber (2) is arranged and that at least one outlet (4) like a rail bridging guide strip (15) for at least an outer edge of the rotor blade (11) is provided, wherein preferably above and below the outlet (4) is provided in each case a guide rail.
EP08785137A 2007-09-07 2008-07-28 Hybrid pump for delivering a liquid pump medium Not-in-force EP2160513B1 (en)

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EP2160513B1 (en) 2010-10-20
WO2009033526A1 (en) 2009-03-19
US20110236241A1 (en) 2011-09-29
DE502008001606D1 (en) 2010-12-02
ES2352311T3 (en) 2011-02-17
US8651844B2 (en) 2014-02-18
DE202007012565U1 (en) 2009-01-22
ATE485449T1 (en) 2010-11-15
AU2008298079A1 (en) 2009-03-19

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