EP1898096A2 - Lobe pump - Google Patents

Lobe pump Download PDF

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Publication number
EP1898096A2
EP1898096A2 EP07012326A EP07012326A EP1898096A2 EP 1898096 A2 EP1898096 A2 EP 1898096A2 EP 07012326 A EP07012326 A EP 07012326A EP 07012326 A EP07012326 A EP 07012326A EP 1898096 A2 EP1898096 A2 EP 1898096A2
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EP
European Patent Office
Prior art keywords
rotor
inlet
runners
pump according
longitudinal axis
Prior art date
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Granted
Application number
EP07012326A
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German (de)
French (fr)
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EP1898096A3 (en
EP1898096B1 (en
Inventor
Gerd Langer
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.)
Herold and Co GmbH
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Herold and Co GmbH
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Priority to PL07012326T priority Critical patent/PL1898096T3/en
Publication of EP1898096A2 publication Critical patent/EP1898096A2/en
Publication of EP1898096A3 publication Critical patent/EP1898096A3/en
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Publication of EP1898096B1 publication Critical patent/EP1898096B1/en
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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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet

Definitions

  • the invention is directed to a pump having a housing formed from two intersecting cylinder sections, inlet and outlet openings being provided on opposite sides and a rotor rotatable about its central longitudinal axis being arranged in each cylinder section, the larger transverse axes of the travelers being in at least one Movement phase are each approximately perpendicular to each other and the rotor sealingly against each other and roll against the housing inner wall, and wherein the extending from the intersection of the large transverse axes generatrices each rotor run in opposite directions obliquely to the respective central longitudinal axis and each runner comprises two approximately club-shaped sections, which are connected together at their narrower end via a constriction, wherein the runners have such a configuration and are arranged relative to each other that when the large transverse axes of the two runners perpendicular to each other, the club-shaped portion of a rotor engages the constriction of the other rotor and the two runners sealingly roll against each other, wherein in each phase of the rotational movement
  • Roots pumps Such generically known as known pumps are referred to as Roots pumps or Roots housing and have been proven in practical use for a long time.
  • the runners conventional such Roots pumps have lateral surfaces which extend parallel to the central longitudinal axis of the rotor and thus perpendicular to the flow direction defined by the inlet and outlet ports. Due to this construction of conventional pumps of this type, the pumped medium pulses relatively strongly in dependence on the respective rotational angle position of the rotor.
  • the US-A-1 142 734 describes a pump with two rotors, which have a cross-sectionally a club-shaped interlocking configuration.
  • the discharge and inlet openings in this construction are on the one hand in the region of the front ends and on the other hand on the opposite side approximately in the middle of the housing.
  • the coiled runners Seen in the longitudinal direction, are composed of two sub-rotors, wherein the curvature of the two sub-rotors changes in the region of the mid-perpendicular. Accordingly, the medium to be pumped is pumped substantially in the axial direction from the outsides to the center.
  • the present invention seeks to improve a pump of the type mentioned while preserving its principal benefits so that a pulsation-free, uniform flow of the pumped medium at high production capacity while avoiding dead spaces is achieved, and it should be possible in particular , largely wear-free abrasive media, such as those found in the sugar industry, or to pump products from the dairy and cheese area.
  • the sinusoidal or cosinusoidal generatrix lines according to the invention may be formed linearly in the geometric sense, such an embodiment being particularly suitable for pumping products from the sugar industry.
  • the generatrices are widened to strip-like sealing surfaces. This version is suitable for dairy and cheese products.
  • an inlet opening in each case on the inlet side and exactly opposite and provided with the inlet opening mirror image aligned an outlet opening.
  • Inlet and outlet ports may advantageously be triangular or trapezoidal.
  • a particularly favorable flow behavior is obtained in that the legs or side edges of the inlet or outlet opening are configured sinusoidally or cosinusoidally.
  • the acute-angled edges of the rotor or piston are reduced to 90 ° angle. This leads to less wear in this area, thus minimizing pressure losses and prolonging stand sides.
  • an end coupling of two rotors with sine or cosine shape is possible, which doubles the delivery volume with the same drive head. Since the transition from one to the other rotor is rounded and does not show any acute angle, the wear is reduced to a minimum.
  • a pump shown in the drawing has a pump housing 1, which consists of two intersecting cylinder sections 2, 3.
  • an inlet opening 4 and an outlet opening 5 are provided on the cylinder jacket surface.
  • the inlet opening 4 and the outlet opening 5 are diametrically opposite and have an approximately trapezoidal cross-section.
  • each cylinder section 2, 3 a respective rotor 6 or 7 is arranged, whose center longitudinal axes 8 and 9 extend parallel to the central longitudinal axis of the respective cylinder section 2 and 3, respectively.
  • the rotor 6 and 7 are rotationally driven about their central longitudinal axes 8 and 9 in the opposite direction (arrows 10, 11).
  • the coordinated drive of both runners 6, 7 can be accomplished in a conventional manner, for example by sitting on the rotor shafts 8, 9, intermeshing gears.
  • Each rotor 6, 7 has an approximately oval shape in cross-section and is coiled in the longitudinal direction, i. screw-like turned around the longitudinal axis. This spiraling is designed such that generatrices 12 are formed, which run sinusoidally.
  • these generatrices are formed linearly in the geometric sense.
  • the runners 6, 7 have seen in cross-section in this embodiment, two opposite side concave recesses 13. This embodiment is suitable for pumping abrasive media such as those found in the sugar industry.
  • the sinusoidal generatrix lines are widened like a ribbon. Seen in cross-section, two indentations 14 are provided in this embodiment on each side, which are mutually opposed with respect to the large central longitudinal axis 15 and the small central longitudinal axis 16.
  • Fig. 6 the runners 6, 7 are indicated on the right to the left of the position of the outlet opening 5 - and this applies correspondingly for the diametrically opposite inlet opening 4 - to illustrate.
  • inlet and outlet openings 4, 5 have a trapezoidal shape, with the trapezoidal legs 17 being sinusoidal or cosinusoidal.
  • the inlet or outlet opening 4, 5 substantially triangular.
  • the triangular legs 18 are also formed sinusoidal or cosinusoidal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

In the intersecting region of the cylinder sections, trapezoidal inlet and outlet ports are provided at the circumferential cylinder surface and are opposed to each other. Located in the interior of each cylinder section is a rotor where central longitudinal axes of the rotors and cylindrical sections are parallel. Each rotor is helically twisted when viewed in the longitudinal direction to create sinusoidal surface lines (12) that function as sealing lines. The rotors are driven about their center longitudinal axes in opposite directions (10,11).

Description

Die Erfindung richtet sich auf eine Pumpe mit einem aus zwei sich schneidenden Zylinderabschnitten gebildeten Gehäuse, wobei an einander gegenüberliegenden Seiten Einlass- und Auslassöffnungen vorgesehen sind und in jedem Zylinderabschnitt ein um dessen Mittellängsachse drehbarer Läufer angeordnet ist, wobei die größeren Querachsen der Läufer in wenigstens einer Bewegungsphase jeweils etwa senkrecht zueinander stehen und die Läufer sich dichtend aneinander und gegen die Gehäuseinnenwand abwälzen, und wobei die von dem Schnittpunkt der großen Querachsen ausgehenden Mantellinien jedes Läufers in einander entgegengesetzter Richtung schräg zur jeweiligen Mittellängsachse verlaufen und jeder Läufer zwei etwa keulenförmige Abschnitte umfasst, welche an ihrem schmäleren Ende über eine Einschnürung miteinander verbunden sind, wobei die Läufer einer derartige Konfiguration aufweisen und relativ zueinander angeordnet sind, dass wenn die großen Querachsen der beiden Läufer senkrecht zueinander stehen, der keulenförmige Abschnitt des einen Läufers in die Einschnürung des anderen Läufers eingreift und die beiden Läufer sich dichtend aneinander abwälzen, wobei in jeder Phase der Drehbewegung die beiden Läufer ein sich gleichmäßig vergrößerndes Ansaugvolumen vor der Einlassöffnung und ein sich gleichmäßig verkleinerndes Auslassvolumen vor der Auslassöffnung bilden.The invention is directed to a pump having a housing formed from two intersecting cylinder sections, inlet and outlet openings being provided on opposite sides and a rotor rotatable about its central longitudinal axis being arranged in each cylinder section, the larger transverse axes of the travelers being in at least one Movement phase are each approximately perpendicular to each other and the rotor sealingly against each other and roll against the housing inner wall, and wherein the extending from the intersection of the large transverse axes generatrices each rotor run in opposite directions obliquely to the respective central longitudinal axis and each runner comprises two approximately club-shaped sections, which are connected together at their narrower end via a constriction, wherein the runners have such a configuration and are arranged relative to each other that when the large transverse axes of the two runners perpendicular to each other, the club-shaped portion of a rotor engages the constriction of the other rotor and the two runners sealingly roll against each other, wherein in each phase of the rotational movement, the two runners before a uniformly increasing intake volume before the inlet opening and a uniformly decreasing outlet volume form the outlet opening.

Eine solche gattungsgemäße Pumpe ist bekannt aus EP 0 363 420 B2 .Such a generic pump is known from EP 0 363 420 B2 ,

Derartige gattungsgemäß als bekannt vorausgesetzte Pumpen werden als Roots-Pumpen bzw. Roots-Gehäuse bezeichnet und sind im praktischen Einsatz seit langem bewährt.Such generically known as known pumps are referred to as Roots pumps or Roots housing and have been proven in practical use for a long time.

Die Läufer herkömmlicher derartiger Roots-Pumpen weisen Mantelflächen auf, welche zur Mittellängsachse des Läufers parallel verlaufen und damit senkrecht zur durch die Ein- und Auslassöffnungen definierten Durchströmungsrichtung. Augrund dieses Aufbaus herkömmlicher derartiger Pumpen pulsiert das gepumpte Medium relativ stark in Abhängigkeit von der jeweiligen Drehwinkelstellung der Läufer.The runners conventional such Roots pumps have lateral surfaces which extend parallel to the central longitudinal axis of the rotor and thus perpendicular to the flow direction defined by the inlet and outlet ports. Due to this construction of conventional pumps of this type, the pumped medium pulses relatively strongly in dependence on the respective rotational angle position of the rotor.

Aus der GB-A-382 953 ist eine gattungsgemäße Pumpe bekannt, bei welcher aufgrund der dort vorgeschlagenen Läuferkonfigurationen jedoch ein erhöhter Laufwiderstand aufgrund von Flüssigkeitskompressionen in Toträumen in Kauf genommen werden muss.From the GB-A-382 953 a generic pump is known in which, however, due to the rotor configurations proposed there, an increased running resistance due to liquid compression in dead spaces must be accepted.

Aus der DE-A-35 02 839 ist eine Pumpe mit zwei Läufern bekannt, welche zwei zueinander parallele Drehachsen aufweisen, wobei die Dichtflächen jeweils schräg zu den Drehachsen verlaufen. Bei dieser vorbekannten Pumpe ist die Auslass- und Einlassöffnung in der axialen Verlängerung der Drehachsen angeordnet. Die Konfiguration der Läufer ist relativ kompliziert.From the DE-A-35 02 839 a pump with two rotors is known, which have two parallel axes of rotation, wherein the sealing surfaces each extend obliquely to the axes of rotation. In this prior art pump, the outlet and inlet ports are located in the axial extension of the axes of rotation. The configuration of the runners is relatively complicated.

Die US-A-1 142 734 beschreibt eine Pumpe mit zwei Läufern, welche im Querschnitt eine keulenförmig ineinandergreifende Konfiguration aufweisen. Die Aus- und Einlassöffnung bei dieser Konstruktion liegen einerseits im Bereich der stirnseitigen Enden und andererseits auf der gegenüberliegenden Seite etwa in der Mitte des Gehäuses. Die gewendelten Läufer setzen sich in Längsrichtung gesehen aus zwei Teilrotoren zusammen, wobei sich im Bereich der Mittelsenkrechten die Krümmung der beiden Teilrotoren ändert. Dementsprechend wird das zu pumpende Medium im wesentlichen in Axialrichtung von den Außenseiten zur Mitte gepumpt.The US-A-1 142 734 describes a pump with two rotors, which have a cross-sectionally a club-shaped interlocking configuration. The discharge and inlet openings in this construction are on the one hand in the region of the front ends and on the other hand on the opposite side approximately in the middle of the housing. Seen in the longitudinal direction, the coiled runners are composed of two sub-rotors, wherein the curvature of the two sub-rotors changes in the region of the mid-perpendicular. Accordingly, the medium to be pumped is pumped substantially in the axial direction from the outsides to the center.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Pumpe der eingangs erwähnten Art unter Wahrung ihrer prinzipiellen Vorteile so zu verbessern, dass eine pulsationsfreie, gleichmäßige Strömung des geförderten Mediums bei hoher Förderkapazität unter Vermeidung von Toträumen erzielt wird, wobei es insbesondere auch möglich sein soll, weitgehend verschleißfrei abrasive Medien, wie sie beispielsweise in der Zuckerindustrie vorkommen, oder Produkte aus dem Molkerei- und Käsereibereich zu pumpen.Proceeding from this, the present invention seeks to improve a pump of the type mentioned while preserving its principal benefits so that a pulsation-free, uniform flow of the pumped medium at high production capacity while avoiding dead spaces is achieved, and it should be possible in particular , largely wear-free abrasive media, such as those found in the sugar industry, or to pump products from the dairy and cheese area.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die als Dichtlinien fungierenden Mantellinien sinusförmig ausgebildet sind.This object is achieved in that the acting as a sealing lines generatrices are formed sinusoidal.

Die erfindungsgemäßen sinusförmigen oder kosinusförmigen Mantellinien können bei einer ersten Ausführungsform im geometrischen Sinn linienförmig ausgebildet sein, wobei sich eine solche Ausführungsform insbesondere zum Pumpen von Produkten aus der Zuckerindustrie eignet.In a first embodiment, the sinusoidal or cosinusoidal generatrix lines according to the invention may be formed linearly in the geometric sense, such an embodiment being particularly suitable for pumping products from the sugar industry.

Bei einer alternativen Ausführungsform sind die Mantellinien zu bandartigen Dichtflächen verbreitert. Diese Ausführung eignet sich für Molkerei- und Käsereiprodukte.In an alternative embodiment, the generatrices are widened to strip-like sealing surfaces. This version is suitable for dairy and cheese products.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, dass bei der letztgenannte Ausführungsform im Querschnitt der Läufer gesehen beiderseits der großen Längsachse bzw. beiderseits der kleinen Längsachse konkave Ausbuchtungen ausgebildet sind.In a further embodiment of the invention, it is provided that in the latter embodiment in cross-section of the rotor seen on both sides of the large longitudinal axis or on both sides of the small longitudinal axis concave bulges are formed.

Mit Vorteil ist einlassseitig jeweils eine Einlassöffnung und exakt gegenüberliegend und mit der Einlassöffnung spiegelbildlich fluchtend eine Auslassöffnung vorgesehen.Advantageously, an inlet opening in each case on the inlet side and exactly opposite and provided with the inlet opening mirror image aligned an outlet opening.

Einlass- und Auslassöffnung können mit Vorteil dreieckig oder trapezförmig ausgebildet sein.Inlet and outlet ports may advantageously be triangular or trapezoidal.

Ein besonders günstiges Strömungsverhalten erhält man dadurch, dass die Schenkel bzw. Seitenkanten der Einlass- bzw. Auslassöffnung sinus- bzw. kosinusförmig konfiguriert sind.A particularly favorable flow behavior is obtained in that the legs or side edges of the inlet or outlet opening are configured sinusoidally or cosinusoidally.

Zusammenfassend lässt sich zu der erfindungsgemäßen Lösung feststellen, dass die spitzwinkligen Kanten der Läufer bzw. Kolben auf 90°-Winkel reduziert werden. Dies führt zu einer geringeren Abnutzung in diesem Bereich, minimiert somit Druckverluste und verlängert Standseiten. Zudem ist eine stirnseitige Kopplung von zwei Rotoren mit Sinus- oder Kosinusform möglich, die das Fördervolumen bei gleichem Antriebskopf verdoppeln. Da der Übergang von dem einem zu dem anderen Rotor abgerundet ist und keine spitzen Winkel vorweist, reduziert sich der Verschleiß auf ein Minimum.In summary, it can be found to the solution according to the invention that the acute-angled edges of the rotor or piston are reduced to 90 ° angle. This leads to less wear in this area, thus minimizing pressure losses and prolonging stand sides. In addition, an end coupling of two rotors with sine or cosine shape is possible, which doubles the delivery volume with the same drive head. Since the transition from one to the other rotor is rounded and does not show any acute angle, the wear is reduced to a minimum.

Die durch den wendelförmig geführten Förderstrom verursachte Taumelbelastung wird zum erheblichen Teil ausgeglichen und somit die wechselwirkende Beanspruchung auf Dichtung und Lagerung minimiert. Auch das nahezu pulsationsfreie Förderverhalten wird nochmals optimiert.The wobble load caused by the helically guided flow is to a considerable extent compensated and thus minimizes the interactive stress on the seal and bearing. The almost pulsation-free conveying behavior is also optimized again.

Vorteile ergeben sich auch durch ein noch medienschonenderes Fördern. So werden stückige Einlagen und scherempfindliche Produkte im stirnflächigen Bereich des Verdrängergehäuses nicht mehr keilförmig eingeschlossen, sondern im rechten Winkel zur Stirnfläche nach vorne geschoben.Benefits also result from an even more media-friendly conveying. Thus lumpy deposits and shear-sensitive products in the end face area of the displacer are no longer wedge-shaped enclosed, but pushed forward at right angles to the face.

Nachfolgend wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung näher erläutert. Dabei zeigen:

Fig. 1
eine Ansicht einer stirnseitig geöffneten erfindungsgemäßen Pumpe,
Fig. 2
eine Stirnansicht einer ersten Ausführungsform eines erfindungsgemäßen Läufers,
Fig. 3
eine Fig. 2 entsprechende Ansicht einer zweiten Ausführungsform,
Fig. 4 und 5
perspektivische Darstellungen von je zwei sich einander abwälzenden erfindungsgemäßen Läufern in unterschiedlichen Relativpositionen und
Fig. 6
eine schematische Darstellung der Konfiguration und Position von Einlass- bzw. Auslassöffnung.
The invention will be explained in more detail with reference to a preferred embodiment in conjunction with the drawings. Showing:
Fig. 1
a view of a frontally open pump according to the invention,
Fig. 2
an end view of a first embodiment of a rotor according to the invention,
Fig. 3
2 a view corresponding to a second embodiment,
4 and 5
perspective representations of each two mutually rolling inventive runners in different relative positions and
Fig. 6
a schematic representation of the configuration and position of the inlet or outlet opening.

Eine in der Zeichnung dargestellte Pumpe weist ein Pumpengehäuse 1 auf, welches aus zwei sich schneidenden Zylinderabschnitten 2, 3 besteht.A pump shown in the drawing has a pump housing 1, which consists of two intersecting cylinder sections 2, 3.

Im Schnittbereich der Zylinderabschnitte 2, 3 sind an der Zylindermantelfläche eine Einlassöffnung 4 und eine Auslassöffnung 5 vorgesehen. Die Einlassöffnung 4 und die Auslassöffnung 5 liegen sich diametral gegenüber und weisen einen etwa trapezförmigen Querschnitt auf.In the section region of the cylinder sections 2, 3, an inlet opening 4 and an outlet opening 5 are provided on the cylinder jacket surface. The inlet opening 4 and the outlet opening 5 are diametrically opposite and have an approximately trapezoidal cross-section.

Im Inneren jedes Zylinderabschnitts 2, 3 ist jeweils ein Läufer 6 bzw. 7 angeordnet, deren Mittellängsachsen 8 bzw. 9 parallel zur Mittellängsachse des jeweiligen Zylinderabschnitts 2 bzw. 3 verläuft.In the interior of each cylinder section 2, 3, a respective rotor 6 or 7 is arranged, whose center longitudinal axes 8 and 9 extend parallel to the central longitudinal axis of the respective cylinder section 2 and 3, respectively.

Die Läufer 6 bzw. 7 sind um ihre Mittellängsachsen 8 bzw. 9 in entgegengesetzter Richtung (Pfeile 10, 11) drehangetrieben. Der koordinierte Antrieb beider Läufer 6, 7 kann in an sich bekannter Weise zum Beispiel durch auf den Läufer-Wellen 8, 9 sitzende, ineinander greifende Zahnräder bewerkstelligt werden.The rotor 6 and 7 are rotationally driven about their central longitudinal axes 8 and 9 in the opposite direction (arrows 10, 11). The coordinated drive of both runners 6, 7 can be accomplished in a conventional manner, for example by sitting on the rotor shafts 8, 9, intermeshing gears.

Jeder Läufer 6, 7 weist im Querschnitt gesehen eine annähernd ovale Form auf und ist in Längsrichtung gesehen gewendelt, d.h. schraubenähnlich um die Längsachse gedreht. Diese Wendelung ist derart ausgebildet, dass Mantellinien 12 entstehen, die sinusförmig verlaufen.Each rotor 6, 7 has an approximately oval shape in cross-section and is coiled in the longitudinal direction, i. screw-like turned around the longitudinal axis. This spiraling is designed such that generatrices 12 are formed, which run sinusoidally.

Beim Ausführungsbeispiel nach Fig. 2 sind diese Mantellinien im geometrischen Sinn linienförmig ausgebildet. Die Läufer 6, 7 weisen bei diesem Ausführungsbeispiel im Querschnitt gesehen zwei gegenüberliegende seitliche konkave Einbuchtungen 13 auf. Diese Ausführungsform eignet sich zum Pumpen abrasiver Medien, wie sie zum Beispiel in der Zuckerindustrie vorkommen.In the embodiment of FIG. 2, these generatrices are formed linearly in the geometric sense. The runners 6, 7 have seen in cross-section in this embodiment, two opposite side concave recesses 13. This embodiment is suitable for pumping abrasive media such as those found in the sugar industry.

Bei der Ausführungsform nach Fig. 3 sind die sinusförmigen Mantellinien bandartig verbreitert ausgebildet. Im Querschnitt gesehen sind bei dieser Ausführungsform auf jeder Seite zwei Einbuchtungen 14 vorgesehen, die sich wechselweise bezogen auf die große Mittellängsachse 15 und die kleine Mittellängsachse 16 gegenüberliegen.In the embodiment according to FIG. 3, the sinusoidal generatrix lines are widened like a ribbon. Seen in cross-section, two indentations 14 are provided in this embodiment on each side, which are mutually opposed with respect to the large central longitudinal axis 15 and the small central longitudinal axis 16.

In Fig. 6 sind rechts die Läufer 6, 7 angedeutet, um links davon die Position der Auslassöffnung 5 - und dies gilt entsprechend für die diametral gegenüberliegende Einlassöffnung 4 - zu veranschaulichen.In Fig. 6, the runners 6, 7 are indicated on the right to the left of the position of the outlet opening 5 - and this applies correspondingly for the diametrically opposite inlet opening 4 - to illustrate.

Im Ausführungsbeispiel sind Einlass- und Auslassöffnung 4, 5 trapezförmig ausgebildet, wobei die Trapezschenkel 17 sinus- bzw. kosinusförmig verlaufen.In the exemplary embodiment, inlet and outlet openings 4, 5 have a trapezoidal shape, with the trapezoidal legs 17 being sinusoidal or cosinusoidal.

Alternativ ist es möglich, die Einlass- bzw. Auslassöffnung 4, 5 im wesentlichen dreieckförmig auszubilden. In diesem Fall sind, wie ebenfalls aus Fig. 6 ersichtlich, die Dreieckschenkel 18 ebenfalls sinus- bzw. kosinusförmig ausgebildet.Alternatively, it is possible to form the inlet or outlet opening 4, 5 substantially triangular. In this case, as also shown in Fig. 6, the triangular legs 18 are also formed sinusoidal or cosinusoidal.

Claims (7)

Pumpe mit einem aus zwei sich schneidenden Zylinderabschnitten (2, 3) gebildeten Gehäuse, wobei an einander gegenüberliegenden Seiten Einlass- und Auslassöffnungen (4, 5) vorgesehen sind und in jedem Zylinderabschnitt (2, 3) ein um dessen Mittellängsachse (8, 9) drehbarer Läufer (6, 7) angeordnet ist, wobei die größeren Querachsen der Läufer in wenigstens einer Bewegungsphase jeweils etwa senkrecht zueinander stehen und die Läufer (6, 7) sich dichtend aneinander und gegen die Gehäuseinnenwand abwälzen, und wobei die von dem Schnittpunkt der großen Querachsen ausgehenden Mantellinien (12) jedes Läufers (6, 7) in einander entgegengesetzter Richtung schräg zur jeweiligen Mittellängsachse (8. 9) verlaufen und jeder Läufer (6, 7) zwei etwa keulenförmige Abschnitte umfasst, welche an ihrem schmäleren Ende über eine Einschnürung miteinander verbunden sind, wobei die Läufer (6, 7) eine derartige Konfiguration aufweisen und relativ zueinander angeordnet sind, dass wenn die großen Querachsen der beiden Läufer (6, 7) senkrecht zueinander stehen, der keulenförmige Abschnitt des einen Läufers (6, 7) in die Einschnürung des anderen Läufers (6, 7) eingreift und die beiden Läufer sich dichtend aneinander abwälzen, wobei in jeder Phase der Drehbewegung die beiden Läufer ein sich gleichmäßig vergrößerndes Ansaugvolumen vor der Einlassöffnung (4) und ein sich gleichmäßig verkleinerndes Auslassvolumen vor der Auslassöffnung (5) bilden, dadurch gekennzeichnet, dass die als Dichtlinien fungierenden Mantellinien (12) sinusförmig ausgebildet sind.Pump having a housing formed of two intersecting cylinder sections (2, 3), wherein on opposite sides inlet and outlet openings (4, 5) are provided and in each cylinder section (2, 3) around its central longitudinal axis (8, 9) rotatable rotor (6, 7) is arranged, wherein the larger transverse axes of the rotor in each case at least one phase of movement are approximately perpendicular to each other and the rotor (6, 7) sealingly roll against each other and against the housing inner wall, and wherein the from the intersection of the large Transverse axes outgoing generatrices (12) of each rotor (6, 7) extend in opposite directions obliquely to the respective central longitudinal axis (8. 9) and each runner (6, 7) comprises two approximately club-shaped sections which at their narrower end via a constriction with each other are connected, wherein the runners (6, 7) have such a configuration and are arranged relative to each other, that when the large transverse axes of the two runners (6, 7) are perpendicular to each other, the club-shaped portion of a rotor (6, 7) in the constriction of the other rotor (6, 7) engages and the two runners sealingly roll against each other, wherein in each phase the rotational movement of the two runners form a uniformly increasing intake volume in front of the inlet opening (4) and a uniformly decreasing outlet volume in front of the outlet opening (5), characterized in that the generatrices (12) acting as sealing lines are sinusoidal. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die sinusförmigen Mantellinien (12) geometrisch-linienförmig ausgebildet sind.Pump according to claim 1, characterized in that the sinusoidal generatrices (12) are formed geometrically-linear. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die sinusförmige Mantellinien (12) zu bandartigen Dichtflächen verbreitert sind.Pump according to claim 1, characterized in that the sinusoidal generatrix lines (12) are widened to strip-like sealing surfaces. Pumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Läufer (6, 7) im Querschnitt gesehen beiderseits der großen Längsachse (15) bzw. beiderseits der kleinen Längsachse (16) konkave Ausbuchtungen (14) aufweisen.Pump according to claim 3, characterized in that the runners (6, 7) seen in cross-section on both sides of the large longitudinal axis (15) or on both sides of the small longitudinal axis (16) concave bulges (14). Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass einlassseitig jeweils eine Einlassöffnung (4) und exakt gegenüberliegend und mit der Einlassöffnung (4) fluchtend eine Auslassöffnung (5) vorgesehen ist.Pump according to claim 1, characterized in that on the inlet side in each case an inlet opening (4) and exactly opposite and with the inlet opening (4) in alignment an outlet opening (5) is provided. Pumpe nach Anspruch 5, dadurch gekennzeichnet, dass Einlass- und Auslassöffnung (4, 5) dreieckig oder trapezförmig ausgebildet sind.Pump according to claim 5, characterized in that the inlet and outlet openings (4, 5) are triangular or trapezoidal. Pumpe nach Anspruch 6, dadurch gekennzeichnet, dass die Schenkel bzw. Seitenkanten (17, 18) der Einlass- bzw. Auslassöffnung (4, 5) sinus- bzw. kosinusförmig konfiguriert sind.Pump according to claim 6, characterized in that the legs or side edges (17, 18) of the inlet or outlet opening (4, 5) are configured sinusoidally or cosinusoidally.
EP07012326A 2006-09-05 2007-06-23 Lobe pump Active EP1898096B1 (en)

Priority Applications (1)

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PL07012326T PL1898096T3 (en) 2006-09-05 2007-06-23 Lobe pump

Applications Claiming Priority (1)

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DE102006041633A DE102006041633A1 (en) 2006-09-05 2006-09-05 pump

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EP1898096A2 true EP1898096A2 (en) 2008-03-12
EP1898096A3 EP1898096A3 (en) 2010-04-28
EP1898096B1 EP1898096B1 (en) 2011-08-03

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US (1) US7766635B2 (en)
EP (1) EP1898096B1 (en)
CN (1) CN101139989B (en)
AT (1) ATE519035T1 (en)
BR (1) BRPI0703913A2 (en)
DE (1) DE102006041633A1 (en)
ES (1) ES2370661T3 (en)
PL (1) PL1898096T3 (en)
RU (1) RU2463481C2 (en)

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DE202012010401U1 (en) * 2012-10-31 2014-02-03 Hugo Vogelsang Maschinenbau Gmbh Rotary pump with direct drive
CN103758755B (en) * 2014-01-27 2015-12-09 浙江理工大学 Eight blade differential pumps that a kind of sinusoidal non-circular gear drives
IT201700045807A1 (en) * 2017-04-28 2017-07-28 Hero Europe S R L Device, dosage system for powdered, liquid, pasty or creamy products and dispensing machine comprising this device
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Publication number Publication date
ES2370661T3 (en) 2011-12-21
US20080056927A1 (en) 2008-03-06
CN101139989A (en) 2008-03-12
RU2463481C2 (en) 2012-10-10
RU2007132984A (en) 2009-03-10
EP1898096A3 (en) 2010-04-28
US7766635B2 (en) 2010-08-03
CN101139989B (en) 2011-10-12
BRPI0703913A2 (en) 2010-01-19
ATE519035T1 (en) 2011-08-15
EP1898096B1 (en) 2011-08-03
DE102006041633A1 (en) 2008-03-13
PL1898096T3 (en) 2011-12-30

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