EP0684384A1 - Toothed belt pump - Google Patents

Toothed belt pump Download PDF

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Publication number
EP0684384A1
EP0684384A1 EP95103052A EP95103052A EP0684384A1 EP 0684384 A1 EP0684384 A1 EP 0684384A1 EP 95103052 A EP95103052 A EP 95103052A EP 95103052 A EP95103052 A EP 95103052A EP 0684384 A1 EP0684384 A1 EP 0684384A1
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EP
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Prior art keywords
toothed belt
toothed
pump
pulley
pressure chamber
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EP95103052A
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German (de)
French (fr)
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EP0684384B1 (en
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Dieter Brox
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    • 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
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members

Definitions

  • the invention relates to an inner toothed belt pump, in particular an inner toothed belt pump, which can also deliver and meter non-lubricating liquids in a speed-controlled manner in the medium pressure range in a self-priming manner.
  • Pumps were originally developed to pump water. The resulting few technical requirements could be met with a small number of designs. Today, a large number of pump types are required to meet the specific requirements of the many areas of application for all types of liquids. Pumps can be divided into two main groups, the group of centrifugal pumps and the group of positive displacement pumps.
  • centrifugal pumps are suitable for pumping a wide variety of liquids, including non-lubricating ones, but are generally not self-priming and are not suitable as speed-controlled pumps over the entire speed range.
  • the positive displacement pumps primarily gear pumps and screw pumps, like the other known positive displacement pumps, are sensitive to foreign bodies and unsuitable for non-lubricating liquids without special precautions.
  • a toothed belt pump is known from US-A 2,745,355, which has a plurality of toothed disks, which are in engagement with a toothed belt.
  • the suction and pressure chambers must be separated from each other by separate spacers.
  • DE-C 25 60 128 shows a pump with a conveyor belt which rotates on two pulleys.
  • This toothed belt pump has a different operating principle compared to US-A 2,745,355 in that the working chambers located between the tooth heads change their cross section by changing the curvature of the movement path.
  • DE-C 42 18 148 describes a toothed belt pump with a belt pulley and two laterally lying belt guide rollers, which run an endless toothed belt with teeth pointing outwards within the pump housing. Due to the arrangement of the toothed belt pulley with the deflection rollers arranged on the side, the rotating toothed belt is subjected to a considerable bending change with counter-bending, which can lead to material fatigue and belt breakage after some operating time.
  • the invention specified in claim 1 is based on the object of designing an internal toothed belt pump which, in the self-priming manner, can also deliver and meter non-lubricating liquids in a speed-controlled manner in the medium pressure range.
  • the internal toothed belt pump consists of a cylindrical housing 1, in which a rotatable, centrally mounted drive shaft 2 carries a toothed pulley 3 with a positive connection.
  • the pitch circle of the toothed belt 4 is adapted in the engagement area 27 by the guide rollers 5 and 6 to the pitch circle radius 25 around the toothed pulley center 23 of the toothed pulley 3. Also starting from the toothed pulley center 23, the radius 26 of the toothed belt back is identical to the radius of the housing inner wall 7 within the engagement region 27, but with less running play (gap).
  • the toothed belt 4 slides and seals with its tooth heads in a circular orbit around the second center point 22 with the second pitch circle radius 24 on the peripheral surface 18 of the sickle-shaped filler piece 8, during which the belt back with a small gap and treads the same orbit without contact to the housing inner wall 9.
  • the circular orbit ends when it re-enters the engagement area 27 and changes to the toothed disk center 23; a new revolution of the toothed belt 4 begins.
  • a suction space 10 is formed after opening the toothing, which is volumetrically limited by the toothed surfaces of the toothed belt 4, toothed pulley 3 and the sickle-shaped filler 8.
  • a pressure chamber 11 is formed by the surfaces of the toothing of toothed belt 4, toothed pulley 3 and sickle-shaped filler 8. Suction and pressure chamber are closed laterally by the pump housing and by the cover 12 of the pump.
  • an overflow channel 14 for the connection between the suction-side pump inlet 13 and the suction chamber 10
  • an overflow channel 16 for the connection between the pressure-side pump outlet 15 and the pressure chamber 11 incorporated.
  • a connecting groove 17 is incorporated laterally into the surface of the pump housing, as a result of which the pressure on the toothed belt 4 is compensated for.
  • the toothed disk 3 By driving the drive shaft 2, the toothed disk 3 is set in rotation according to the direction of the arrow via a positive connection.
  • the toothed belt 4, which is in full tooth engagement with the toothed pulley 3 within the engagement region 27, likewise becomes a circular orbit outside the angular region 27, but around the center point 22 with the pitch circle radius 24 between the housing wall 9 and the peripheral surface 18 of the crescent-shaped filler 8 , moves, taking a path from the suction chamber 10 to the pressure chamber 11.
  • the conveying means is transported from the tooth gaps 19 of the pulley 3 and the tooth gaps 21 of the toothed belt 4 along the boundary surfaces 18 and 20 to the pressure chamber 11, where the intermeshing toothing of the toothed pulley 3 and toothed belt 4 provides the conveying means is displaced from the tooth gaps 19 and 21 via the overflow channel 16 to the pressure-side pump outlet 15.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Pulleys (AREA)

Abstract

PCT No. PCT/EP95/01564 Sec. 371 Date Dec. 12, 1996 Sec. 102(e) Date Dec. 12, 1996 PCT Filed Apr. 25, 1995 PCT Pub. No. WO95/29339 PCT Pub. Date Nov. 2, 1995The invention relates to an internal toothed belt pump, in particular an internal toothed belt pump which is self-priming and can deliver and meter also non-lubricant fluids at a controlled pump speed and medium pressure.

Description

Die Erfindung betrifft eine Innenzahnriemenpumpe, insbesondere eine Innenzahnriemenpumpe, die selbstansaugend auch nichtschmierende Flüssigkeiten drehzahlgeregelt im mittleren Druckbereich fördern und dosieren kann.The invention relates to an inner toothed belt pump, in particular an inner toothed belt pump, which can also deliver and meter non-lubricating liquids in a speed-controlled manner in the medium pressure range in a self-priming manner.

Ursprünglich waren Pumpen für die Förderung von Wasser entwickelt worden. Die daraus resultierenden wenigen technischen Anforderungen konnten mit einer geringen Anzahl von Bauarten erfüllt werden. Heute ist eine Vielzahl von Pumpenbauarten erforderlich, um die spezifischen Anforderungen der vielen Einsatzgebiete für alle Arten von Flüssigkeiten zu erfüllen. Pumpen lassen sich in zwei Hauptgruppen, in die Gruppe der Kreiselpumpen und in die Gruppe der Verdrängerpumpen, aufteilen.Pumps were originally developed to pump water. The resulting few technical requirements could be met with a small number of designs. Today, a large number of pump types are required to meet the specific requirements of the many areas of application for all types of liquids. Pumps can be divided into two main groups, the group of centrifugal pumps and the group of positive displacement pumps.

Die Kreiselpumpen eignen sich für die Förderung von unterschiedlichsten, auch nichtschmierenden Flüssigkeiten, sind aber im allgemeinen nicht selbstansaugend und als drehzahlgeregelte Pumpen über den gesamten Drehzahlbereich nicht geeignet.The centrifugal pumps are suitable for pumping a wide variety of liquids, including non-lubricating ones, but are generally not self-priming and are not suitable as speed-controlled pumps over the entire speed range.

Die Verdrangerpumpen, in erster Linie Zahnradpumpen und Schraubenspindelpumpen, sind ebenso wie die anderen bekannten Verdrängerpumpen empfindlich gegen Fremdkörper und ohne besondere Vorkehrungen für nichtschmierende Flüssigkeiten ungeeignet.The positive displacement pumps, primarily gear pumps and screw pumps, like the other known positive displacement pumps, are sensitive to foreign bodies and unsuitable for non-lubricating liquids without special precautions.

Unter den Verdrangerpumpen ist aus der US-A 2,745,355 eine Zahnriemenpumpe bekannt, die mehrere Zahnscheiben aufweist, welche mit einem Zahnriemen im Eingriff stehen. Saug- und Druckraum müssen bei dieser Pumpe durch gesonderte Distanzstücke voneinander getrennt werden. Die DE-C 25 60 128 zeigt eine Pumpe mit einem Förderriemen, der auf zwei Riemenscheiben umläuft. Diese Zahnriemenpumpe weist ein gegenüber der US-A 2,745,355 anderes Funktionsprinzip auf, indem durch Änderung der Krümmung der Bewegungsbahn die zwischen den Zahnköpfen befindlichen Arbeitskammern ihren Querschnitt ändern. In der DE-C 42 18 148 wird eine Zahnriemenpumpe mit einer Riemenscheibe und zwei seitlich anliegenden Riemenführungsrollen beschrieben, die einen endlosen Zahnriemen mit nach außen weisenden Zähnen innerhalb des Pumpengehäuses umlaufen lassen. Durch die Anordnung der Zahnriemenscheibe mit den seitlich angeordneten Umlenkrollen wird der umlaufende Zahnriemen einem erheblichen Biegewechsel mit Gegenbiegung unterzogen, der nach einiger Betriebszeit zur Materialermüdung und zum Riemenbruch führen kann.Among the positive displacement pumps, a toothed belt pump is known from US-A 2,745,355, which has a plurality of toothed disks, which are in engagement with a toothed belt. In this pump, the suction and pressure chambers must be separated from each other by separate spacers. DE-C 25 60 128 shows a pump with a conveyor belt which rotates on two pulleys. This toothed belt pump has a different operating principle compared to US-A 2,745,355 in that the working chambers located between the tooth heads change their cross section by changing the curvature of the movement path. DE-C 42 18 148 describes a toothed belt pump with a belt pulley and two laterally lying belt guide rollers, which run an endless toothed belt with teeth pointing outwards within the pump housing. Due to the arrangement of the toothed belt pulley with the deflection rollers arranged on the side, the rotating toothed belt is subjected to a considerable bending change with counter-bending, which can lead to material fatigue and belt breakage after some operating time.

Aus der DE-A 25 58 074 ist bereits eine Innenzahnriemenpumpe bekannt, deren Funktion ähnlich der Pumpe nach der DE-C 25 60 128 ist.From DE-A 25 58 074 an internal toothed belt pump is already known, the function of which is similar to the pump according to DE-C 25 60 128.

Der im Anspruch 1 angegebenen Erfindung liegt die Aufgabe zugrunde, eine Innenzahnriemenpumpe zu gestalten, die selbstansaugend auch nichtschmierende Flüssigkeiten drehzahlgeregelt im mittleren Druckbereich fördern und dosieren kann.The invention specified in claim 1 is based on the object of designing an internal toothed belt pump which, in the self-priming manner, can also deliver and meter non-lubricating liquids in a speed-controlled manner in the medium pressure range.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Die Innenzahnriemenpumpe besteht aus einem zylinderförmigen Gehäuse 1, in dem eine drehbare, zentrisch gelagerte Antriebswelle 2 mit einer formschlüssigen Verbindung eine Zahnscheibe 3 trägt.This object is solved by the features of claim 1. The internal toothed belt pump consists of a cylindrical housing 1, in which a rotatable, centrally mounted drive shaft 2 carries a toothed pulley 3 with a positive connection.

Durch die Innenverzahnung des Zahnriemens 4 in Verbindung mit den am Zahnriemenrücken anliegenden, drehbar gelagerten Führungsrollen 5 und 6 und der Zahnscheibe 3 wird ein günstiges Eingriffsverhältnis erreicht, das heißt, es sind immer alle innerhalb des Eingriffsbereichs 27 zwischen den Führungsrollen 5 und 6 befindlichen Zähne der Zahnscheibe 3 und des Zahnriemens 4 voll im Eingriff. Der Teilkreis des Zahnriemens 4 wird im Eingriffsbereich 27 durch die Führungsrollen 5 und 6 dem Teilkreisradius 25 um den Zahnscheibenmittelpunkt 23 der Zahnscheibe 3 angepaßt. Ebenfalls vom Zahnscheibenmittelpunkt 23 ausgehend ist der Radius 26 des Zahnriemenrückens mit dem Radius der Gehäuseinnenwand 7 innerhalb des Eingriffsbereichs 27, jedoch mit geringerem Laufspiel (Spalt) identisch.Due to the internal toothing of the toothed belt 4 in connection with the rotatably mounted guide rollers 5 and 6, which rest against the toothed belt back, and the toothed pulley 3, a favorable engagement ratio is achieved, i.e. there are always all the teeth located within the engagement area 27 between the guide rollers 5 and 6 Toothed pulley 3 and toothed belt 4 fully engaged. The pitch circle of the toothed belt 4 is adapted in the engagement area 27 by the guide rollers 5 and 6 to the pitch circle radius 25 around the toothed pulley center 23 of the toothed pulley 3. Also starting from the toothed pulley center 23, the radius 26 of the toothed belt back is identical to the radius of the housing inner wall 7 within the engagement region 27, but with less running play (gap).

Nach Verlassen des Eingriffsbereichs 27 beim Überrollen der Führungsrolle 6 in Drehrichtung beschreitet der Zahnriemen 4 mit seinen Zahnköpfen gleitend und dichtend eine kreisförmige Umlaufbahn um den zweiten Mittelpunkt 22 mit dem zweiten Teilkreisradius 24 auf der Umfangsfläche 18 des sichelförmigen Füllstückes 8, währenddessen der Riemenrücken mit geringem Spalt und berührungsfrei zur Gehäuseinnenwand 9 die gleiche Umlaufbahn beschreitet. Die kreisförmige Umlaufbahn endet bei Wiedereintritt in den Eingriffsbereich 27 und dem Wechsel zum Zahnscheibenmittelpunkt 23; ein neuer Umlauf des Zahnriemens 4 beginnt.After leaving the engagement area 27 when rolling over the guide roller 6 in the direction of rotation, the toothed belt 4 slides and seals with its tooth heads in a circular orbit around the second center point 22 with the second pitch circle radius 24 on the peripheral surface 18 of the sickle-shaped filler piece 8, during which the belt back with a small gap and treads the same orbit without contact to the housing inner wall 9. The circular orbit ends when it re-enters the engagement area 27 and changes to the toothed disk center 23; a new revolution of the toothed belt 4 begins.

Zwischen dem Ende des Eingriffsbereichs 27 in Drehrichtung der kämmenden Verzahnung gesehen, wird nach dem Öffnen der Verzahnung ein Saugraum 10 gebildet, welcher durch die verzahnten Flächen von Zahnriemen 4, Zahnscheibe 3 und dem sichelförmigen Füllstück 8 volumetrisch begrenzt ist. Desgleichen wird beim Schließen der Verzahnung am Anfang des Eingriffsbereichs 27 durch die Flächen der Verzahnung von Zahnriemen 4, Zahnscheibe 3 und dem sichelförmigen Füllstück 8 ein Druckraum 11 gebildet. Saug- und Druckraum werden seitlich durch das Pumpengehäuse und durch den Deckel 12 der Pumpe abgeschlossen.Seen between the end of the engagement area 27 in the direction of rotation of the meshing toothing, a suction space 10 is formed after opening the toothing, which is volumetrically limited by the toothed surfaces of the toothed belt 4, toothed pulley 3 and the sickle-shaped filler 8. Likewise, when the toothing is closed at the beginning of the engagement region 27, a pressure chamber 11 is formed by the surfaces of the toothing of toothed belt 4, toothed pulley 3 and sickle-shaped filler 8. Suction and pressure chamber are closed laterally by the pump housing and by the cover 12 of the pump.

Innwandig ist im Deckel 12 für die Verbindung vom saugseitigen Pumpeneingang 13 und dem Saugraum 10 ein Überströmkanal 14, für die Verbindung vom druckseitigen Pumpenausgang 15 und dem Druckraum 11 ein Überströmkanal 16 eingearbeitet.Inside the cover 12 there is an overflow channel 14 for the connection between the suction-side pump inlet 13 and the suction chamber 10, and an overflow channel 16 for the connection between the pressure-side pump outlet 15 and the pressure chamber 11 incorporated.

Im Bereich des Druckraumes 11 ist eine Verbindungsnut 17 seitlich in die Fläche des Pumpengehäuses eingearbeitet, wodurch der Druck auf den Zahnriemen 4 kompensiert wird.In the area of the pressure chamber 11, a connecting groove 17 is incorporated laterally into the surface of the pump housing, as a result of which the pressure on the toothed belt 4 is compensated for.

Die Erfindung wird nachstehend an einem Ausführungsbeispiel noch weiter erläutert und anhand von Zeichnungen dargestellt.

  • Figur 1 zeigt eine Schnittdarstellung der Vorderansicht einer Innenzahnriemenpumpe.
  • Figur 2 zeigt eine Vorderansicht einer Zahnriemenpumpe mit aufgeschraubtem Gehäusedeckel.
  • Figur 3 zeigt eine Detailvergrößerung im Bereich des Zahneingriffs von Zahnriemen und Zahnscheibe.
  • Figur 4 zeigt eine perspektivische Darstellung einer Zusammenbauzeichnung mit aufgeschraubtem Gehäusedeckel.
The invention is explained in more detail below using an exemplary embodiment and illustrated with the aid of drawings.
  • Figure 1 shows a sectional view of the front view of an internal toothed belt pump.
  • FIG. 2 shows a front view of a toothed belt pump with a screwed-on housing cover.
  • FIG. 3 shows an enlarged detail in the area of the tooth engagement of the toothed belt and toothed pulley.
  • FIG. 4 shows a perspective illustration of an assembly drawing with the housing cover screwed on.

Durch Antrieb der Antriebswelle 2 wird über eine formschlüssige Verbindung die Zahnscheibe 3 entsprechend der Pfeilrichtung in Drehung versetzt. Der Zahnriemen 4, welcher mit der Zahnscheibe 3 innerhalb des Eingriffsbereichs 27 in vollem Zahneingriff steht, wird außerhalb des Winkelbereichs 27 ebenfalls zu einer kreisförmigen Umlaufbahn, jedoch um den Mittelpunkt 22 mit dem Teilkreisradius 24 zwischen der Gehäusewandung 9 und der Umfangsfläche 18 des sichelförmigen Füllstücks 8, bewegt, wobei er einen Weg vom Saugraum 10 bis hin zum Druckraum 11 beschreitet. Vom saugseitigen Pumpeneingang 13 über den Überströmkanal 14 wird das Fördermittel von den Zahnlücken 19 der Riemenscheibe 3 und den Zahnlücken 21 des Zahnriemens 4 entlang den Begrenzungsflächen 18 bzw. 20 zum Druckraum 11 transportiert, wo durch die kämmende Verzahnung von Zahnscheibe 3 und Zahnriemen 4 das Fördermittel aus den Zahnlücken 19 und 21 über den Überströmkanal 16 zum druckseitigen Pumpenausgang 15 verdrängt wird.By driving the drive shaft 2, the toothed disk 3 is set in rotation according to the direction of the arrow via a positive connection. The toothed belt 4, which is in full tooth engagement with the toothed pulley 3 within the engagement region 27, likewise becomes a circular orbit outside the angular region 27, but around the center point 22 with the pitch circle radius 24 between the housing wall 9 and the peripheral surface 18 of the crescent-shaped filler 8 , moves, taking a path from the suction chamber 10 to the pressure chamber 11. From the suction-side pump inlet 13 via the overflow channel 14, the conveying means is transported from the tooth gaps 19 of the pulley 3 and the tooth gaps 21 of the toothed belt 4 along the boundary surfaces 18 and 20 to the pressure chamber 11, where the intermeshing toothing of the toothed pulley 3 and toothed belt 4 provides the conveying means is displaced from the tooth gaps 19 and 21 via the overflow channel 16 to the pressure-side pump outlet 15.

Claims (4)

1. Innenzahnriemenpumpe mit folgenden Merkmalen: a) In einem zylinderförmigen Gehäuse (1) wird durch eine drehbare, zentrisch gelagerte Antriebswelle (2) mit einer formschlüssigen Verbindung eine Zahnscheibe (3) getragen; b) durch zwei am Zahnriemenrücken anliegende, drehbar gelagerte Führungsrollen (5, 6) ist ein Eingriffsbereich (27) festgelegt, innerhalb dessen die Innenverzahnung des Zahnriemens (4) mit der Außenverzahnung der Zahnscheibe (3) voll im Eingriff steht; c) der Teilkreis des Zahnriemens (4) ist innerhalb des Eingriffsbereichs (27) durch die am Zahnriemenrücken anliegenden Führungsrollen (5, 6) dem Teilkreis der Zahnscheibe (3) angepaßt; d) innerhalb des Eingriffsbereichs (27) entspricht - abgesehen vom Laufspiel - ausgehend vom Zahnscheibenmittelpunkt (23) der Radius (26) des Zahnriemenrückens dem Radius der Gehäuseinnenwand (7); e) außerhalb des Eingriffsbereichs (27) läuft der Zahnriemen (4) auf einer kreisförmigen Umlaufbahn um einen zweiten Mittelpunkt (22) mit einem zweiten Teilkreisradius (24) um, die Zahnköpfe des Zahnriemens liegen zwischen einem Saugraum (10) und einem Druckraum (11) gleitend und dichtend auf der Umfangsfläche (18) eines sichelförmigen Füllstücks (8), und der Zahnriemenrükken ist mit geringem Spalt und berührungsfrei zur Gehäuseinnenwand angeordnet; f) in Drehrichtung der Verzahnung betrachtet, ist am Ende des Eingriffsbereichs (27) der Saugraum (10) und am Anfang des Eingriffsbereichs der Druckraum (11) ausgebildet, wobei die Räume (10, 11) durch die Verzahnung von Zahnriemen und Zahnscheibe (3), das sichelförmige Füllstück (8), das seitliche Pumpengehäuse und einen Deckel (12) volumetrisch begrenzt sind; g) die von den Zahnköpfen des Zahnriemens (4) und der Zahnscheibe (3) mit den Umfangsflächen (18, 20) des Füllstücks (8) gebildeten ersten und zweiten abgedichteten Zahnlücken (19, 21) fördern Flüssigkeit vom Saugraum (10) zum Druckraum (11). 1. Internal toothed belt pump with the following features: a) In a cylindrical housing (1) a toothed disc (3) is supported by a rotatable, centrally mounted drive shaft (2) with a positive connection; b) an engagement area (27) is defined by two rotatably mounted guide rollers (5, 6) resting on the toothed belt back, within which the internal toothing of the toothed belt (4) is fully engaged with the external toothing of the toothed pulley (3); c) the pitch circle of the toothed belt (4) is adapted to the pitch circle of the toothed pulley (3) within the engagement area (27) by the guide rollers (5, 6) resting on the toothed belt back; d) within the engagement area (27) - apart from the running clearance - starting from the toothed pulley center (23), the radius (26) of the toothed belt back corresponds to the radius of the housing inner wall (7); e) outside the engagement area (27), the toothed belt (4) runs in a circular orbit around a second center point (22) with a second pitch circle radius (24), the toothed heads of the toothed belt lie between a suction chamber (10) and a pressure chamber (11 ) sliding and sealing on the peripheral surface (18) of a crescent-shaped filler (8), and the toothed belt back is arranged with a small gap and without contact to the housing inner wall; f) viewed in the direction of rotation of the toothing, the suction chamber (10) is formed at the end of the engagement region (27) and the pressure chamber (11) is formed at the beginning of the engagement region, the spaces (10, 11) being formed by the toothing of the toothed belt and toothed pulley (3 ), the sickle-shaped filler (8), the side pump housing and a cover (12) are volumetrically limited; g) the first and second sealed tooth gaps (19, 21) formed by the tooth heads of the toothed belt (4) and the toothed pulley (3) with the peripheral surfaces (18, 20) of the filler (8) convey liquid from the suction chamber (10) to the pressure chamber (11). 2. Innenzahnriemenpumpe nach Anspruch 1, dadurch gekennzeichnet, daß innwandig im Dekkel (12) für die Verbindung vom saugseitigen Pumpeneingang (13) und dem Saugraum (10) ein Überströmkanal (14) eingearbeitet ist.2. Internal toothed belt pump according to claim 1, characterized in that an overflow channel (14) is incorporated in the inner wall in the cover (12) for the connection of the suction-side pump inlet (13) and the suction chamber (10). 3. Innenzahnriemenpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß innwandig im Deckel (12) für die Verbindung vom druckseitigen Pumpenausgang (15) und dem Druckraum (11) ein Überströmkanal (16) eingearbeitet ist.3. Internal toothed belt pump according to claim 1 or 2, characterized in that an overflow channel (16) is incorporated in the inner wall in the cover (12) for the connection of the pressure-side pump outlet (15) and the pressure chamber (11). 4. Innenzahnriemenpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß seitlich in die Fläche des Pumpengehäuses (1) innerhalb des Druckraumes (11) eine Verbindungsnut (17) eingearbeitet ist, die den Druck auf die verzahnte Seite des Zahnriemens (4) mit dem des Zahnriemenrückens kompensiert.4. Internal toothed belt pump according to one of claims 1 to 3, characterized in that a connection groove (17) is incorporated laterally into the surface of the pump housing (1) within the pressure chamber (11), which pressure on the toothed side of the toothed belt (4) compensated with that of the toothed belt back.
EP95103052A 1994-04-25 1995-03-03 Toothed belt pump Expired - Lifetime EP0684384B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4414319A DE4414319C2 (en) 1994-04-25 1994-04-25 Internal toothed belt pump
DE4414319 1994-04-25

Publications (2)

Publication Number Publication Date
EP0684384A1 true EP0684384A1 (en) 1995-11-29
EP0684384B1 EP0684384B1 (en) 1997-12-17

Family

ID=6516329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103052A Expired - Lifetime EP0684384B1 (en) 1994-04-25 1995-03-03 Toothed belt pump

Country Status (12)

Country Link
US (1) US5782623A (en)
EP (1) EP0684384B1 (en)
JP (1) JPH09512319A (en)
CN (1) CN1085787C (en)
AT (1) ATE161316T1 (en)
AU (1) AU692603B2 (en)
CA (1) CA2188758A1 (en)
CZ (1) CZ285350B6 (en)
DE (3) DE4414319C2 (en)
ES (1) ES2113688T3 (en)
GR (1) GR3026378T3 (en)
WO (1) WO1995029339A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324574A (en) * 1997-01-08 1998-10-28 Timothy Charles Woodhouse Fluid pump
DE102020100915A1 (en) 2020-01-16 2021-07-22 Fink Chem + Tec GmbH Gear pump for pumping a pumped medium

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998030801A1 (en) * 1997-01-08 1998-07-16 Tickner, Stephen, Ronald Fluid pump with a flexible toothed belt
DE19748120C2 (en) * 1997-10-31 2003-01-02 Werner Scheffel displacement
CN101608617B (en) * 2008-06-20 2012-07-25 安徽理工大学 Internally-geared low-pulsation gear pump
DE102010034101B4 (en) * 2010-08-12 2013-02-28 Siemens Aktiengesellschaft Arrangement for radiotherapy with a support arm for supporting diagnostic irradiation
TWI743126B (en) * 2016-07-08 2021-10-21 瑞士商雀巢製品股份有限公司 Rotary compressor arrangement

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DE460732C (en) * 1928-06-02 Max Ams Chemical Engineering C Gear pump with two nested gears
GB903788A (en) * 1960-04-20 1962-08-22 Eisele Soehne Franz Improvements in or relating to double-acting rotary displacement pumps
JPS5557601A (en) * 1978-10-20 1980-04-28 Tokico Ltd Fluid machine

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US2745355A (en) * 1953-06-01 1956-05-15 Roper Corp Geo D Pump or fluid motor of the gear type
AT207693B (en) * 1957-06-12 1960-02-25 Elio Parodi Gear drive with revolving gear rim, in particular for conveying liquids or gases
CH591627A5 (en) * 1975-12-19 1977-09-30 Rollstar Ag
DE2560128C2 (en) * 1975-12-22 1984-10-04 Manfred 7141 Beilstein Streicher Rotary piston pump
DE2558074C3 (en) * 1975-12-22 1981-04-30 Manfred 7141 Beilstein Streicher Rotary piston pump
SU1355760A1 (en) * 1984-07-20 1987-11-30 Омский политехнический институт Gear pump
SU1399504A1 (en) * 1985-12-13 1988-05-30 Предприятие П/Я В-8670 Gear-type hydraulic machine with internal meshing
GB8817284D0 (en) * 1988-07-20 1988-08-24 Jaguar Cars Hydraulic devices
DE4218148A1 (en) * 1992-06-02 1992-10-08 Dieter Brox TIMING BELT PUMP

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Publication number Priority date Publication date Assignee Title
DE460732C (en) * 1928-06-02 Max Ams Chemical Engineering C Gear pump with two nested gears
GB903788A (en) * 1960-04-20 1962-08-22 Eisele Soehne Franz Improvements in or relating to double-acting rotary displacement pumps
JPS5557601A (en) * 1978-10-20 1980-04-28 Tokico Ltd Fluid machine

Non-Patent Citations (1)

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Title
PATENT ABSTRACTS OF JAPAN vol. 4, no. 99 (M - 021) 16 July 1980 (1980-07-16) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324574A (en) * 1997-01-08 1998-10-28 Timothy Charles Woodhouse Fluid pump
GB2324574B (en) * 1997-01-08 2000-12-20 Timothy Charles Woodhouse Fluid pump
DE102020100915A1 (en) 2020-01-16 2021-07-22 Fink Chem + Tec GmbH Gear pump for pumping a pumped medium

Also Published As

Publication number Publication date
DE4414319C2 (en) 1995-02-09
CZ285350B6 (en) 1999-07-14
CN1085787C (en) 2002-05-29
DE4414319A1 (en) 1994-09-29
EP0684384B1 (en) 1997-12-17
DE19510079A1 (en) 1996-09-26
JPH09512319A (en) 1997-12-09
AU692603B2 (en) 1998-06-11
WO1995029339A1 (en) 1995-11-02
AU3556395A (en) 1995-11-16
CN1146794A (en) 1997-04-02
CZ310196A3 (en) 1997-02-12
DE59501120D1 (en) 1998-01-29
ES2113688T3 (en) 1998-05-01
CA2188758A1 (en) 1995-11-02
US5782623A (en) 1998-07-21
ATE161316T1 (en) 1998-01-15
GR3026378T3 (en) 1998-06-30

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