EP1076760B1 - Rotating piston machine with three-blade rotors - Google Patents

Rotating piston machine with three-blade rotors Download PDF

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Publication number
EP1076760B1
EP1076760B1 EP99948559A EP99948559A EP1076760B1 EP 1076760 B1 EP1076760 B1 EP 1076760B1 EP 99948559 A EP99948559 A EP 99948559A EP 99948559 A EP99948559 A EP 99948559A EP 1076760 B1 EP1076760 B1 EP 1076760B1
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EP
European Patent Office
Prior art keywords
rotors
piston machine
rotating piston
machine according
cell
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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.)
Expired - Lifetime
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EP99948559A
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German (de)
French (fr)
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EP1076760A1 (en
Inventor
Reinhard Garczorz
Fritz-Martin Scholz
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Rietschle Werner GmbH and Co KG
Werner Rietschle GmbH and Co KG
Original Assignee
Rietschle Werner GmbH and Co KG
Werner Rietschle GmbH and Co KG
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Publication of EP1076760A1 publication Critical patent/EP1076760A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/122—Arrangements for supercharging the working space
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/123—Rotary-piston pumps specially adapted for elastic fluids 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 or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth

Definitions

  • the invention relates to a rotary piston machine according to the preamble of Claim 1.
  • Rotary lobe machines with three-bladed rotors are as roots blowers known.
  • the inlet and outlet are together aligned on a line that is perpendicular to the axes of the rotors.
  • the volume flow is through the interlocking wings in the chamber transported and pushed out at the outlet without internal compression.
  • Such Rotary lobe machine is particularly useful as a charger for relatively high volume flows suitable.
  • DE-A-2 422 857 describes a rotary lobe machine of the generic type known, with two three-bladed rotors, which are offset by parallel Rotate the axes in opposite directions and comb them without contact as well as with the Circumferential wall of the chamber form separate cells, the claw-like wings of the rotors with the chamber at the same time through the Rotation of the rotors and their volume increasing suction cell Rotation of the rotors form their volume-reducing pressure cell. Furthermore is off GB-A-818 691 discloses a rotary vane pump in which between inlet and outlet formed a charging cell connected to a charging port becomes.
  • the claw-like form Wing of the rotors with the chamber at the same time by rotating the Rotors their volume increasing suction cell and a by rotating the Rotors pressure cell reducing their volume. Since the rotary lobe machine with inner compression and at the same time working with inner expansion, it is for suitable for the simultaneous generation of pressure and negative pressure. Furthermore, the Rotors with chamber two initially in the course of the rotation of the rotors separate charging cells that continue to rotate the rotors be combined with each other to form the pressure cell. Over the charging cells one can Media stream are fed in, so that at the pressure outlet a corresponding increased volume flow is available. The charging cells become essentially isobar and isochoric in the Pump chamber moved; the one in the charging cells Medium essentially experiences during the displacement of the charging cells no pressure and no volume change.
  • the geometry of the rotors is determined by the requirement in the chamber simultaneously for the generation of pressure and vacuum differentiate required cells. Because the rotors contactless with each other and also with the peripheral wall of the chamber interact, no wear occurs in the area of the chamber.
  • the sealing gap between the rotors can be optimized by optimizing their Geometry can be kept very small; in the case of practical ones Designs only fractions of a millimeter, so that good printing and Vacuum values are guaranteed. These values are even increasing Operating time better, since the build up over time Deposits lead to a reduction in the size of the sealing gap.
  • the rotary lobe machine according to the invention is particularly suitable for Use as a pump for the simultaneous generation of compressed air and Vacuum.
  • it is particularly suitable for use in suitable for the paper processing industry, especially if none separate provision or setting of compressed air and vacuum is required.
  • Compressed air is e.g. to blow on one side Stacks of paper needed to support sheet separation.
  • the pulsating compressed air generation by such a pump proves to be here as useful because the paper edges due to intermittent Compressed air can be separated more easily.
  • the rotary lobe machine according to the invention is below Example of a pump for the simultaneous generation of compressed air and Vacuum described. However, the invention is for such an application not limited.
  • the single-stage pump for the simultaneous generation of Compressed air and vacuum has a housing that consists of a load-bearing Middle part 10, one on one side of the middle part 10 attached housing cover 12, one on the other side of the Middle part 10 attached housing ring 14 and one on the housing ring 14 adjoining cover plate 16. Between the middle part 10, the housing ring 14 and the cover plate 16 is a pump chamber 18 educated.
  • a pump chamber 18 educated in the opposite wall parts of the Housing cover 12 and the middle part 10 are two shafts 20, 22 flying parallel to and offset from each other in ball bearings stored.
  • the pinion 24, 26 are in meshing engagement with one another so that the shafts 20, 22 rotate synchronously in opposite directions.
  • For the rotary drive is the lower shaft 22 led out of the housing cover 12.
  • each rotor has 30, 32 three wings 30a and 32a.
  • the pump chamber 18 has the side view Form of two intersecting circles, joined together in the form of an "8" are.
  • the blades 30a of the rotor 30 have a shape that the shape of the blades 32a of the rotor 32 is different.
  • the geometry the wing 30a, 32a and the pump chamber 18 is determined so that at the rotation of the rotors 30, 32 a plurality of separate cells be formed, as with reference to Figures 4a to 4h further explained in more detail below by using the wings 30a, 32a without contact a sealing gap of a fraction of 1 mm above and along slide the outer periphery of the pump chamber 18.
  • the cover plate 16 is with a series of recesses provided to the outside by a patch plate 36th be completed.
  • the closure plate 36 are two pipe sockets 42, 44 screwed in.
  • the upper pipe socket 42 forms the suction connection and is connected to a recess 50 of the cover plate 16.
  • the lower pipe socket 44 forms the pressure connection and is with a Recess 52 connected in the cover plate 16.
  • Two more Recesses 54a, 54b in the cover plate 16 are to the outside Atmosphere open and form charging ports.
  • Figure 4a shows the rotors 30, 32 in a rotational position in which their wings 30a, 32a with the wall of the pump chamber 18 a closed, only common to the recess 50 Form cell 60.
  • This cell 60 enlarges in the further Rotation of the rotors 30, 32 their volume, as can be seen in Figure 4b.
  • This cell 60 is therefore a suction cell.
  • FIG. 4c shows two cells 62a, 62b which are separate from one another arise immediately after the state shown in FIG cell 60 was separated into two sub-cells.
  • the rotor 30 assigned cell 62a already borders the recess 54a, and the Cell 62b associated with rotor 32 approaches recess 54b.
  • Figure 4d are the cells 62a, 62b with those leading to the atmosphere Recesses 54a and 54b in connection and are filled with air and charged to ambient pressure so that the air mass flow increases becomes.
  • the cells 62a, 62b are thus charging cells.
  • the pump chamber 18 is free of any lubricant because the Work rotors 30, 32 without contact. To the drive side is the Pump chamber 18 sealed by seals on the shafts 20, 22.
  • the housing can be equipped with cooling fins for cooling be, and arranged on the side of the housing cover 12 Cooling fan is cooling air from the cover plate 16 over the Housing ring 14, the middle part 10 and the housing cover 12 out.
  • a resonance damper is used to dampen the operating noise, which is matched to the operating frequency of the pump. This frequency is due to the three-bladed design of the rotors triple speed of the shafts 20, 22. The increased operating frequency facilitates the accommodation of the resonance damper because of its length is reduced accordingly.
  • the described flying storage of the rotors is advantageous up to a volume flow of about 300 m 3 / h.
  • Pumps with a larger volume flow are preferably designed with rotors mounted on both sides. In this case, connections are left in both side plates.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)

Description

Die Erfindung betrifft eine Drehkolbenmaschine gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a rotary piston machine according to the preamble of Claim 1.

Drehkolbenmaschinen mit dreiflügeligen Rotoren sind als Roots-Gebläse bekannt. Bei derartigen Maschinen sind Einlass und Auslass miteinander fluchtend auf einer Linie angeordnet, die senkrecht zu den Achsen der Rotoren ist. Der Volumenstrom wird durch die ineinandergreifenden Flügel in der Kammer befördert und am Auslass ohne innere Verdichtung ausgeschoben. Eine solche Drehkolbenmaschine ist besonders als Lader für relativ hohe Volumenströme geeignet.Rotary lobe machines with three-bladed rotors are as roots blowers known. In such machines, the inlet and outlet are together aligned on a line that is perpendicular to the axes of the rotors. The volume flow is through the interlocking wings in the chamber transported and pushed out at the outlet without internal compression. Such Rotary lobe machine is particularly useful as a charger for relatively high volume flows suitable.

Aus der DE-A-2 422 857 ist eine gättungsgemäße Drehkolbenmaschine bekannt, mit zwei dreiflügelige Rotoren, die um parallele, gegeneinander versetzte Achsen gegenläufig rotieren und berührungslos kämmen sowie mit der Umfangswandung der Kammer voneinander getrennte Zellen bilden, wobei die klauenartigen Flügel der Rotoren mit der Kammer gleichzeitig eine durch die Drehung der Rotoren ihr Volumen vergrößernde Saugzelle und eine durch die Drehung der Rotoren ihr Volumen verkleinernde Druckzelle bilden. Ferner ist aus der GB-A-818 691 eine Drehschieber-Pumpe bekannt, bei der zwischen Einlaß und Auslaß eine mit einem Aufladeanschluß verbundene Aufladezelle gebildet wird. DE-A-2 422 857 describes a rotary lobe machine of the generic type known, with two three-bladed rotors, which are offset by parallel Rotate the axes in opposite directions and comb them without contact as well as with the Circumferential wall of the chamber form separate cells, the claw-like wings of the rotors with the chamber at the same time through the Rotation of the rotors and their volume increasing suction cell Rotation of the rotors form their volume-reducing pressure cell. Furthermore is off GB-A-818 691 discloses a rotary vane pump in which between inlet and outlet formed a charging cell connected to a charging port becomes.

Durch die im Patentanspruch 1 angegebene Erfindung wird eine Drehkolbenmaschine mit dreiflügeligen Rotoren zur Verfügung gestellt, die mit innerer Verdichtung und innerer Expansion arbeitet und auch bei relativ kleinen Volumenströmen sowohl zur Druck- als auch zur Vakuumerzeugung geeignet ist.By the invention specified in claim 1 is a Rotary lobe machine with three-bladed rotors provided with inner compression and inner expansion works and even with relatively small Volume flows are suitable for both pressure and vacuum generation.

Bei der erfindungsgemäßen Drehkolbenmaschine bilden die klauenartigen Flügel der Rotoren mit der Kammer gleichzeitig eine durch die Drehung der Rotoren ihr Volumen vergrößernde Saugzelle und eine durch die Drehung der Rotoren ihr Volumen verkleinernde Druckzelle. Da die Drehkolbenmaschine mit innerer Verdichtung und gleichzeitig mit innerer Expansion arbeitet, ist sie zur gleichzeitigen Erzeugung von Druck und Unterdruck geeignet. Ferner bilden die Rotoren mit der Kammer zwei im Verlauf der Drehung der Rotoren zunächst voneinander getrennte Aufladezellen, die bei der weiteren Drehung der Rotoren mitinander zur Druckzelle vereinigt werden. Über die Aufladezellen kann ein Medienstrom eingespeist werden, so dass am Druckausgang ein entsprechend vergrößerter Volumenstrom zur Verfügung steht. Die Aufladezellen werden vor ihrer Vereinigung im wesentlichen isobar und isochor in der Pumpenkammer verschoben; das sich in den Aufladezellen befindliche Medium erfährt bei der Verschiebung der Aufladezellen im wesentlichen keine Druck- und keine Volumenänderung.In the rotary piston machine according to the invention, the claw-like form Wing of the rotors with the chamber at the same time by rotating the Rotors their volume increasing suction cell and a by rotating the Rotors pressure cell reducing their volume. Since the rotary lobe machine with inner compression and at the same time working with inner expansion, it is for suitable for the simultaneous generation of pressure and negative pressure. Furthermore, the Rotors with chamber two initially in the course of the rotation of the rotors separate charging cells that continue to rotate the rotors be combined with each other to form the pressure cell. Over the charging cells one can Media stream are fed in, so that at the pressure outlet a corresponding increased volume flow is available. The charging cells become essentially isobar and isochoric in the Pump chamber moved; the one in the charging cells Medium essentially experiences during the displacement of the charging cells no pressure and no volume change.

Die Geometrie der Rotoren wird durch die Forderung bestimmt, in der Kammer gleichzeitig die für die Erzeugung von Druck und Vakuum erforderlichen Zellen voneinander abzugrenzen. Da die Rotoren berührungslos miteinander und auch mit der Umfangswand der Kammer zusammenwirken, tritt im Bereich der Kammer keinerlei Verschleiß auf. Der Dichtspalt zwischen den Rotoren kann durch Optimierung ihrer Geometrie sehr klein gehalten werden; er beträgt bei praktischen Ausführungen nur Bruchteile eines Millimeters, so daß gute Druck- und Vakuumwerte gewährleistet sind. Diese Werte werden sogar mit zunehmender Betriebsdauer besser, da die sich mit der Zeit bildenden Ablagerungen zu einer Verkleinerung der Dichtspalte führen.The geometry of the rotors is determined by the requirement in the chamber simultaneously for the generation of pressure and vacuum differentiate required cells. Because the rotors contactless with each other and also with the peripheral wall of the chamber interact, no wear occurs in the area of the chamber. The sealing gap between the rotors can be optimized by optimizing their Geometry can be kept very small; in the case of practical ones Designs only fractions of a millimeter, so that good printing and Vacuum values are guaranteed. These values are even increasing Operating time better, since the build up over time Deposits lead to a reduction in the size of the sealing gap.

Die erfindungsgemäße Drehkolbenmaschine eignet sich besonders zur Verwendung als Pumpe für die gleichzeitige Erzeugung von Druckluft und Vakuum. In dieser Anwendung ist sie besonders für den Einsatz im papierverarbeitenden Gewerbe geeignet, insbesondere dann, wenn keine getrennte Bereitstellung oder Einstellung von Druckluft und Vakuum erforderlich ist. Druckluft wird z.B. zum seitlichen Anblasen eines Papierstapels für die Unterstützung der Bogentrennung benötigt. Die pulsierende Drucklufterzeugung durch eine solche Pumpe erweist sich hier als zweckmäßig, da die Papierkanten durch stoßweise auftretende Druckluft leichter getrennt werden können. Unterdruck ist bei derartigen Anwendungen gleichzeitig zum Ansaugen des obersten Papierbogens erforderlich.The rotary lobe machine according to the invention is particularly suitable for Use as a pump for the simultaneous generation of compressed air and Vacuum. In this application, it is particularly suitable for use in suitable for the paper processing industry, especially if none separate provision or setting of compressed air and vacuum is required. Compressed air is e.g. to blow on one side Stacks of paper needed to support sheet separation. The pulsating compressed air generation by such a pump proves to be here as useful because the paper edges due to intermittent Compressed air can be separated more easily. There is negative pressure in such Applications simultaneously for the suction of the top sheet of paper required.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung einer bevorzugten Ausführungsform und aus der Zeichnung, auf die Bezug genommen wird. In der Zeichnung zeigen:

  • Figur 1 einen Längsschnitt der erfindungsgemäßen Drehkolbenmaschine;
  • Figur 2 eine Ansicht entlang Linie II-II in Figur 1;
  • Figur 3 eine Ansicht entlang Linie III-III in Figur 1; und
  • Figuren 4a bis 4h schematische Ansichten verschiedener Rotorstellungen zur Erläuterung der Wirkungsweise.
    • Further advantages and features of the invention result from the following description of a preferred embodiment and from the drawing, to which reference is made. The drawing shows:
  • 1 shows a longitudinal section of the rotary lobe machine according to the invention;
  • Figure 2 is a view along line II-II in Figure 1;
  • Figure 3 is a view along line III-III in Figure 1; and
  • Figures 4a to 4h schematic views of different rotor positions to explain the mode of operation.

    • Die erfindungsgemäße Drehkolbenmaschine wird nachfolgend am Beispiel einer Pumpe für gleichzeitige Erzeugung von Druckluft und Vakuum beschrieben. Auf eine solche Anwendung ist die Erfindung aber nicht beschränkt.The rotary lobe machine according to the invention is below Example of a pump for the simultaneous generation of compressed air and Vacuum described. However, the invention is for such an application not limited.

    Die einstufig ausgebildete Pumpe zur gleichzeitigen Erzeugung von Druckluft und Unterdruck hat ein Gehäuse, das aus einem tragenden Mittelteil 10, einem auf der einen Seite des Mittelteils 10 aufgesetzten Gehäusedeckel 12, einem an die andere Seite des Mittelteils 10 angefügten Gehäusering 14 und einer an den Gehäusering 14 anschließenden Deckelplatte 16 besteht. Zwischen dem Mittelteil 10, dem Gehäusering 14 und der Deckelplatte 16 ist eine Pumpenkammer 18 gebildet. In den einander gegenüberliegenden Wandungsteilen des Gehäusedeckels 12 und des Mittelteils 10 sind zwei Wellen 20, 22 parallel zueinander und gegeneinander versetzt in Kugellagern fliegend gelagert. Auf jeder Welle 20, 22 sitzt ein Ritzel 24, 26. Die Ritzel 24, 26 stehen miteinander in Kämmeingriff, so daß die Wellen 20, 22 miteinander synchron entgegengesetzt rotieren. Für den Drehantrieb ist die untere Welle 22 aus dem Gehäusedeckel 12 herausgeführt.The single-stage pump for the simultaneous generation of Compressed air and vacuum has a housing that consists of a load-bearing Middle part 10, one on one side of the middle part 10 attached housing cover 12, one on the other side of the Middle part 10 attached housing ring 14 and one on the housing ring 14 adjoining cover plate 16. Between the middle part 10, the housing ring 14 and the cover plate 16 is a pump chamber 18 educated. In the opposite wall parts of the Housing cover 12 and the middle part 10 are two shafts 20, 22 flying parallel to and offset from each other in ball bearings stored. On each shaft 20, 22 there is a pinion 24, 26. The pinion 24, 26 are in meshing engagement with one another so that the shafts 20, 22 rotate synchronously in opposite directions. For the rotary drive is the lower shaft 22 led out of the housing cover 12.

    Auf den in die Pumpenkammer 14 hineinragenden freien Enden der Wellen 20, 22 sind zwei Rotoren 30, 32 angeordnet. Da der durch die Rotoren 30, 32 gebildete Lastangriff nicht zwischen, sondern außerhalb der Lager liegt, ergibt sich eine fliegende Wellenlagerung. Jeder der Rotoren 30, 32 ist justierbar an der zugehörigen Welle 20 bzw. 22 befestigt. Wie aus Figur 2 ersichtlich ist, hat jeder Rotor 30, 32 drei Flügel 30a bzw. 32a. Die Pumpenkammer 18 hat in Seitenansicht die Form von zwei sich schneidenden Kreisen, die in Form einer "8" zusammengefügt sind. Die Flügel 30a des Rotors 30 haben eine Form, die von der Form der Flügel 32a des Rotors 32 verschieden ist. Die Geometrie der Flügel 30a, 32a und der Pumpenkammer 18 ist so bestimmt, daß bei der Drehung der Rotoren 30, 32 mehrere voneinander getrennte Zellen gebildet werden, wie unter Bezugnahme auf die Figuren 4a bis 4h weiter unten näher erläutert, indem die Flügel 30a, 32a berührungsfrei mit einem Dichtspalt eines Bruchteils von 1 mm übereinander und entlang dem Außenumfang der Pumpenkammer 18 gleiten.On the free ends protruding into the pump chamber 14 Shafts 20, 22, two rotors 30, 32 are arranged. Because of the Rotors 30, 32 formed load attack not between, but outside the bearing lies, there is a flying shaft bearing. Everyone who Rotors 30, 32 are adjustable on the associated shaft 20 or 22 attached. As can be seen from FIG. 2, each rotor has 30, 32 three wings 30a and 32a. The pump chamber 18 has the side view Form of two intersecting circles, joined together in the form of an "8" are. The blades 30a of the rotor 30 have a shape that the shape of the blades 32a of the rotor 32 is different. The geometry the wing 30a, 32a and the pump chamber 18 is determined so that at the rotation of the rotors 30, 32 a plurality of separate cells be formed, as with reference to Figures 4a to 4h further explained in more detail below by using the wings 30a, 32a without contact a sealing gap of a fraction of 1 mm above and along slide the outer periphery of the pump chamber 18.

    Die Deckelplatte 16 ist mit einer Reihe von Aussparungen versehen, die nach außen durch eine aufgesetzte Verschlußplatte 36 abgeschlossen werden. In die Verschlußplatte 36 sind zwei Rohrstutzen 42, 44 eingeschraubt. Der obere Rohrstutzen 42 bildet den Sauganschluß und ist mit einer Aussparung 50 der Deckelplatte 16 verbunden. Der untere Rohrstutzen 44 bildet den Druckanschluß und ist mit einer Aussparung 52 in der Deckelplatte 16 verbunden. Zwei weitere Aussparungen 54a, 54b in der Deckelplatte 16 sind nach außen zur Atmosphäre geöffnet und bilden Aufladeanschlüsse.The cover plate 16 is with a series of recesses provided to the outside by a patch plate 36th be completed. In the closure plate 36 are two pipe sockets 42, 44 screwed in. The upper pipe socket 42 forms the suction connection and is connected to a recess 50 of the cover plate 16. The lower pipe socket 44 forms the pressure connection and is with a Recess 52 connected in the cover plate 16. Two more Recesses 54a, 54b in the cover plate 16 are to the outside Atmosphere open and form charging ports.

    Figur 4a zeigt die Rotoren 30, 32 in einer Drehstellung, bei der ihre Flügel 30a, 32a mit der Wandung der Pumpenkammer 18 eine abgeschlossene, nur mit der Aussparung 50 in Verbindung stehende, gemeinsame Zelle 60 bilden. Diese Zelle 60 vergrößert bei der weiteren Drehung der Rotoren 30, 32 ihr Volumen, wie in Figur 4b ersichtlich. Es handelt sich bei dieser Zelle 60 also um eine Saugzelle.Figure 4a shows the rotors 30, 32 in a rotational position in which their wings 30a, 32a with the wall of the pump chamber 18 a closed, only common to the recess 50 Form cell 60. This cell 60 enlarges in the further Rotation of the rotors 30, 32 their volume, as can be seen in Figure 4b. This cell 60 is therefore a suction cell.

    Figur 4c zeigt zwei voneinander getrennte Zellen 62a, 62b, die unmittelbar nach dem in Figur 4b gezeigten Zustand entstehen, indem die Zelle 60 in zwei Teilzellen getrennt wurde. Die dem Rotor 30 zugeordnete Zelle 62a grenzt schon an die Aussparung 54a an, und die dem Rotor 32 zugeordnete Zelle 62b nähert sich der Aussparung 54b. In Figur 4d sind die Zellen 62a, 62b mit den zur Atmosphäre führenden Aussparungen 54a bzw. 54b in Verbindung und werden mit Luft aufgefüllt und auf Umgebungsdruck autgeladen, so daß der Luftmassenstrom erhöht wird. Es handelt sich bei den Zellen 62a, 62b somit um Aufladezellen. Nachdem diese Aufladezellen 62a, 62b durch den nacheilenden Flügel 30a bzw. 32b von der zugehörigen Aussparung 54a bzw. 54b abgetrennt sind, wie in Figur 4e gezeigt, werden die Zellen 62a, 62b isobar und isochor verschoben, bis sie sich, wie in Figur 4f gezeigt, miteinander zu einer Druckzelle 64 vereinigen. Bei der weiteren Drehung der Rotoren 30, 32 verkleinert die Druckzelle 64 ihr Volumen. Die in der Druckzelle 64 verdichtete Luft wird über die Aussparung 52 zum Rohrstutzen 44 ausgeschoben, wie in den Figuren 4g und 4h veranschaulicht ist.FIG. 4c shows two cells 62a, 62b which are separate from one another arise immediately after the state shown in FIG cell 60 was separated into two sub-cells. The rotor 30 assigned cell 62a already borders the recess 54a, and the Cell 62b associated with rotor 32 approaches recess 54b. In Figure 4d are the cells 62a, 62b with those leading to the atmosphere Recesses 54a and 54b in connection and are filled with air and charged to ambient pressure so that the air mass flow increases becomes. The cells 62a, 62b are thus charging cells. After these charging cells 62a, 62b through the trailing wing 30a or 32b are separated from the associated recess 54a or 54b, As shown in Figure 4e, cells 62a, 62b become isobaric and isochoric shifted until they close together, as shown in Figure 4f unite a pressure cell 64. As the rotors continue to rotate 30, 32, the pressure cell 64 reduces its volume. The one in the pressure cell 64 compressed air becomes a pipe socket via the recess 52 44 pushed out, as illustrated in Figures 4g and 4h.

    Die Pumpenkammer 18 ist frei von jeglichem Schmiermittel, da die Rotoren 30, 32 berührungsfrei arbeiten. Zur Antriebsseite hin ist die Pumpenkammer 18 durch Dichtungen an den Wellen 20, 22 abgedichtet.The pump chamber 18 is free of any lubricant because the Work rotors 30, 32 without contact. To the drive side is the Pump chamber 18 sealed by seals on the shafts 20, 22.

    Durch die fliegende Anordnung der Rotoren 30, 32 auf den Wellen 20, 22, die zu einer fliegenden Lagerung führt, wird der Zugang zur Pumpenkammer erleichtert, da für einen Zugang lediglich die Deckelplatte 16 abzunehmen ist. Auch die Kühlung wird durch diese Anordnung erleichtert. Zur Kühlung kann das Gehäuse mit Kühlrippen ausgestattet werden, und durch ein auf der Seite des Gehäusedeckels 12 angeordnetes Kühlgebläse wird kühlende Luft von der Deckelplatte 16 her über den Gehäusering 14, das Mittelteil 10 und den Gehäusedeckel 12 geführt.Due to the flying arrangement of the rotors 30, 32 on the shafts 20, 22, which leads to a flying storage, access to the Pump chamber facilitates, since only the cover plate for access 16 is to be removed. This arrangement also provides cooling facilitated. The housing can be equipped with cooling fins for cooling be, and arranged on the side of the housing cover 12 Cooling fan is cooling air from the cover plate 16 over the Housing ring 14, the middle part 10 and the housing cover 12 out.

    Zur Dämpfung der Betriebsgeräusche dient ein Resonanz-Dämpfer, der auf die Betriebsfrequenz der Pumpe abgestimmt ist. Diese Frequenz beträgt aufgrund der dreiflügeligen Ausbildung der Rotoren die dreifache Drehzahl der Wellen 20, 22. Die erhöhte Betriebsfrequenz erleichtert die Unterbringung des Resonanz-Dämpfers, da dessen Länge entsprechend verkleinert wird.A resonance damper is used to dampen the operating noise, which is matched to the operating frequency of the pump. This frequency is due to the three-bladed design of the rotors triple speed of the shafts 20, 22. The increased operating frequency facilitates the accommodation of the resonance damper because of its length is reduced accordingly.

    Die beschriebene fliegende Lagerung der Rotoren ist bis zu einem Volumenstrom von etwa 300 m3/h vorteilhaft. Pumpen mit größerem Volumenstrom werden vorzugsweise mit beidseitig gelagerten Rotoren ausgebildet. In diesem Falle sind in beiden Seitenplatten Anschlüsse ausgespart.The described flying storage of the rotors is advantageous up to a volume flow of about 300 m 3 / h. Pumps with a larger volume flow are preferably designed with rotors mounted on both sides. In this case, connections are left in both side plates.

    Claims (10)

    1. A rotating piston machine comprising a chamber (18) formed in a housing, in which three-blade rotors (30, 32) rotate in opposite directions about parallel staggered axes, the rotors intermeshing free of contact and, together with the peripheral wall of the chamber (18), forming cells (60, 62a, 62b, 64) which are separate from each other, the claw-like blades of the rotors (30, 32), together with the chamber (18), simultaneously defining a suction cell (60) whose volume increases by the rotation of the rotors (30, 32) and a pressure cell (64) whose volume decreases by the rotation of the rotors (30, 32), a suction port (42) opening into the suction cell (60) and a pressure port (52) opening in the area of the pressure cell (64),
         characterized in that
      (a) the medium present in the pressure cell (64) undergoes an internal compression,
      (b) the medium compressed in the pressure cell (64) is expelled via the pressure port (52), and
      (c) at least one charging cell (62a, 62b) which is separate from the suction cell (60) and from the pressure cell (64) has an associated charging port (54a, 54b).
    2. The rotating piston machine according to claim 1, characterized in that the rotors (30, 32), together with the chamber, define two charging cells (62a, 62b) which are initially separate from each other during the rotation of the rotors (30, 32) and which, during the further rotation of the rotors (30, 32), are united with each other to define the pressure cell (64).
    3. The rotating piston machine according to claim 2, characterized in that, before being united, the charging cells (62a, 62b) are shifted essentially isobarically and isochorically in the chamber (18).
    4. The rotating piston machine according to any of the preceding claims, characterized in that the suction port (42) passes through a side plate of the housing.
    5. The rotating piston machine according to any of the preceding claims, characterized in that the pressure port (52) passes through a side plate (16) of the housing.
    6. The rotating piston machine according to any of the preceding claims, characterized in that the chamber (18) is lubricant-free.
    7. The rotating piston machine according to any of the preceding claims, characterized in that the chamber (18) is delimited between two parallel side plates (10, 16) and recesses for the ports (50, 52, 54a, 54b) are formed in at least one of the side plates (16).
    8. The rotating piston machine according to any of the preceding claims, characterized in that the shafts (20, 22) are cantilevered and the rotors (30, 32) are arranged on free ends of the shafts (20, 22).
    9. The rotating piston machine according to any of the preceding claims, characterized in that the shafts (20, 22) are synchronized by two pinions (24, 26) which intermesh with each other and at least one of the rotors (30, 32) is adjustably attached to the associated shaft (20, 22).
    10. The rotating piston machine according to any of the preceding claims, characterized by its use as a pump for simultaneously generating pressure and negative pressure.
    EP99948559A 1998-04-30 1999-04-28 Rotating piston machine with three-blade rotors Expired - Lifetime EP1076760B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19819538 1998-04-30
    DE19819538A DE19819538C2 (en) 1998-04-30 1998-04-30 Pressure suction pump
    PCT/EP1999/002881 WO1999057419A1 (en) 1998-04-30 1999-04-28 Rotating piston machine with three-blade rotors

    Publications (2)

    Publication Number Publication Date
    EP1076760A1 EP1076760A1 (en) 2001-02-21
    EP1076760B1 true EP1076760B1 (en) 2003-07-02

    Family

    ID=7866414

    Family Applications (2)

    Application Number Title Priority Date Filing Date
    EP99923485A Expired - Lifetime EP1075601B1 (en) 1998-04-30 1999-04-28 Vacuum pump
    EP99948559A Expired - Lifetime EP1076760B1 (en) 1998-04-30 1999-04-28 Rotating piston machine with three-blade rotors

    Family Applications Before (1)

    Application Number Title Priority Date Filing Date
    EP99923485A Expired - Lifetime EP1075601B1 (en) 1998-04-30 1999-04-28 Vacuum pump

    Country Status (7)

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    US (2) US6439865B1 (en)
    EP (2) EP1075601B1 (en)
    JP (2) JP2002513887A (en)
    KR (2) KR100608527B1 (en)
    CN (2) CN1128935C (en)
    DE (3) DE19819538C2 (en)
    WO (2) WO1999057419A1 (en)

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    Also Published As

    Publication number Publication date
    EP1075601A1 (en) 2001-02-14
    JP2002513880A (en) 2002-05-14
    KR20010043094A (en) 2001-05-25
    CN1299434A (en) 2001-06-13
    EP1075601B1 (en) 2002-09-18
    DE19819538C2 (en) 2000-02-17
    KR100556077B1 (en) 2006-03-07
    DE59902761D1 (en) 2002-10-24
    JP2002513887A (en) 2002-05-14
    CN1128935C (en) 2003-11-26
    US6439865B1 (en) 2002-08-27
    CN1299444A (en) 2001-06-13
    DE59906193D1 (en) 2003-08-07
    WO1999057419A1 (en) 1999-11-11
    DE19819538A1 (en) 1999-11-11
    KR20010043093A (en) 2001-05-25
    KR100608527B1 (en) 2006-08-09
    WO1999057439A1 (en) 1999-11-11
    US6364642B1 (en) 2002-04-02
    EP1076760A1 (en) 2001-02-21
    CN1105820C (en) 2003-04-16

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