EP2100009B1 - System for sealing the piston of rotary piston machines - Google Patents

System for sealing the piston of rotary piston machines Download PDF

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Publication number
EP2100009B1
EP2100009B1 EP07822696.6A EP07822696A EP2100009B1 EP 2100009 B1 EP2100009 B1 EP 2100009B1 EP 07822696 A EP07822696 A EP 07822696A EP 2100009 B1 EP2100009 B1 EP 2100009B1
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EP
European Patent Office
Prior art keywords
rotor
sealing
housing
forces
spring
Prior art date
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Not-in-force
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EP07822696.6A
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German (de)
French (fr)
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EP2100009A1 (en
Inventor
Günther Eggert
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EN3 GmbH
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EN3 GmbH
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Priority to EP11179629.8A priority Critical patent/EP2450530B1/en
Publication of EP2100009A1 publication Critical patent/EP2100009A1/en
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Classifications

    • 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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/10—Sealings for working fluids between radially and axially movable parts
    • 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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/02—Radially-movable sealings for working fluids
    • F01C19/04—Radially-movable sealings for working fluids of rigid material
    • 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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/08—Axially-movable sealings for working fluids
    • 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
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • 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
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0881—Construction of vanes or vane holders the vanes consisting of two or more parts
    • 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
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • F01C1/22—Rotary-piston machines or engines of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member

Definitions

  • the invention relates to a principle and system for sealing rotary piston against the surrounding housing wall of rotary compression and -Expansionsmaschinen.
  • Wankel a motor type was developed, which has only two components moving around the working space: a housing with a trochoidal raceway and a rotary piston, also derived from a trochoid, as the inner one Enveloping body of the housing track. On this piston can be arranged sealing strips that meet the condition of the unchanged geometric shape.
  • the engine type has become known as a Wankel engine.
  • the disclosed sealing system for rotary piston engines can FR 2 571 779 do not reach a closed sealing line.
  • the sealing system with the parts 24, 51 and 55 is arranged in a groove.
  • the part 24 is followed by one or more bent elements of two parts 53 and 54.
  • a compression spring 55 is arranged, which is to provide a seal against the part 24.
  • the pressure of the medium creates a force on the surface, which compresses the curved part again.
  • the pressurized medium can enter into further working chambers by slit flow.
  • the arrangement of all sealing strips does not give around the piston around leading closed sealing system.
  • the object is to provide a sealing system for rotary piston machines, which applies the principle of the same geometric shape of the sealing line according to F. Wankel that other types of rotary piston machines for expansion and compression processes in higher temperature ranges and with improved properties in terms of volume change, lubrication and heat dissipation can be realized.
  • the sealing system for rotary piston engines with a rotor consisting of two or more parallel rotor discs, which are pressed with their outer surfaces by spring / media forces on the end faces of a housing, wherein in radially directed guide grooves slidable wings are arranged with half-wings, through Form lamellae are formed, characterized in that the half-wings are enclosed by wing cassettes, in which they are displaced by inner bevels of the half-wings and a compression spring resting pressure wedge, which is located in the inner space formed by the half-wings, against each other, wherein the form of blades in their mutual overlap sealing edges, the at the rotor movement flexible rich in the corner regions of the housing and seal them, and adapt by spring forces the radial and axial changes in the housing, and thus form together with the rotor discs continuous sealing surfaces against the passage of the medium.
  • the rotor consists of two or more parallel rotor disks, of which the outer, to the front-side housing walls facing discs are pressed by spring and / or gas forces on the housing wall, that there sealingly abut with their surface and a flow around is not possible and in that the sealing of the joints between the rotor disks by sealing strips be sealed within the joints and connect these sealing strips to the sealing strips, which rest against the housing track resiliently so that there is a system continuous planar sealing lines, which has no interruptions.
  • the sealing strips are formed by packages of movable mold plates which form labyrinth seals with and together with the rotor disks and in that the disk packs by means of spring and / or media forces to the geometric changes of the rotary piston machine, which occur in the movement or by pressures and temperatures , can customize.
  • the sealing strips which bear against the circumference of the housing track, consist of mold plates that overlap each other so that they form sealing edges that extend flexibly into the corner regions of the housing during the rotor movement and seal them and that these form slats by spring forces the radial and adjust for axial changes in the housing.
  • the mold blades have bevelled edges, so that wedge-shaped pressure elements can act by spring force on the beveled edges, that the lamellae can be displaced in both directions of a plane against each other and thus form the packets of mold blades sealing elements, which are located on the space in which they are arranged , can adapt to two directions.
  • the disk segments from which the rotor is assembled have radial grooves on the sides facing each other into which packets of mold blades are fitted, so that the joints between the disk segments are sealed by flexible labyrinth seals.
  • the disk segments have, on the sides facing each other around the rotor axis, annular grooves in which either a closed ring can be inserted and the rotor seals off towards the axis or a disk segment seals off an annular one Recess has, which fits in the opposite annular groove of the counter-disc and seals the rotor to the axis.
  • the rotor disks which form the piston, have recesses between the piston tips on their outer surfaces in such a way that media forces can act on these recesses, which are directed counter to the media forces acting in the joints and thus reduce the resulting pressure forces against the housing wall to the extent that which ensures the tightness, but minimizes friction.
  • the disc segments are designed so that they form a labyrinth seal even as a form of lamella in combination with other form of lamellae.
  • Figure 1 The principle of the seal is described with reference to Figure 1.
  • the rotor of the machine is separated into the two rotor disks 1 and 2, which are pressed with their outer surfaces 6 and 8 by spring / media forces on the end faces of the housing and thus seal the rotor against the housing.
  • the gap 11 between the segment discs is closed inwardly towards the rotor shaft by a peripheral cover 10.
  • the guide grooves 5 With the cover 10, the guide grooves 5 are connected, in which wing parts 3, 4 sit, which form a wing of the vane cell rotor.
  • the wings 3, 4 are formed by form of slats, which can adapt to the geometric changes.
  • FIG 2a The rotor of the vane-cell rotor consists of the rotor disks 12 and 13, which are pressed apart by springs 14 and thus sealingly abut against the front sides of the housing.
  • the springs are located in the (non-continuous) holes 15 in both segment discs.
  • the rotor disk 12 engages with the hub 17 in the receptacle 16 of the rotor disk 13 and closes the parting line 19, corresponding to the cover 10 according to Figure 1.
  • the slots 18 in the rotor disks 12 and 13 correspond to the Guide grooves 5 as shown in Figure 1.
  • Fig. 2b In the slots 18 of the rotor there are the wing cassettes 20 which, due to their internal spring forces, adapt in the radial direction to the housing track and in the axial direction to the front sides of the housing and at the same time extend into the corners between the two raceways of the housing and seal them off.
  • the two identical half-wings 21 and 22 which are stacked so that they can be moved against each other and thus come to the front sides of the housing as a seal to the plant. In this position they form with the rotor disks 12 and 13 continuous sealing surfaces against the passage of the medium.
  • the pressure force of the half-wings 21 and 22 for this system is achieved by the inner beveled edges 23 and the pressure wedge 24 resting on the compression spring 25.
  • the pressure wedge 24 is located in the inner space formed by the half-wings 21 and 22.
  • the compression spring 25 is supported against the bottom of the cassette shell 26. The radial sealing movement of the half-wings 21 and 22 in the rotation of the rotor is additionally achieved by the springs 25.
  • Figure 2c shows the nested rotor discs 12 and 13 with a wing cassette 20 in the slot 18 in the rotor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Sealing Devices (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Rotary Pumps (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

Gegenstand der Erfindung ist ein Prinzip und System zur Abdichtung von Rotationskolben gegen die umgebende Gehäusewand von Rotations-Kompressions- und -Expansionsmaschinen.The invention relates to a principle and system for sealing rotary piston against the surrounding housing wall of rotary compression and -Expansionsmaschinen.

Stand der TechnikState of the art

Für Rotationskolbenmaschinen sind unterschiedliche Lösungswege zur Herstellung der Dichtheit des Kolbens gegen die umgebenden Gehäusewand beim Bewegungsablauf bekannt. Sogenannte Flügelzellenmaschinen erreichen eine fast gute Dichtheit durch die hohe Maßgenauigkeit der Bauteile Rotor, Gehäuse und Flügel, die den Arbeitsraum umschließen und die zur Funktion notwendigen kleinstmöglichen Spalte zwischen den Bauteilen ergeben. In bestimmten Anwendungsfällen lässt sich die Dichtheit noch verbessern, indem ein geeignetes Fluid in die Maschine gebracht wird und ein geringer Fluidfilm als Dichtkörper zwischen den Bauteilen entsteht. Bei der Durchführung von Kompressionsaufgaben solcher Maschinen werden die verbleibenden Spaltverluste in Kauf genommen. Sie wirken sich als Verminderung der Förderleistung aus, die durch Erhöhung der Antriebsleistung des Kompressors ausgeglichen werden kann. Bei Expansionsmaschinen können die Spaltverluste zum Funktionsverlust führen, insbesondere dann, wenn eine schädliche Expansion überwiegend über die Spalte erfolgt und sich nicht als Nutzdrehkraft des Rotors auswirkt.For rotary piston machines different approaches for producing the tightness of the piston against the surrounding housing wall during the movement are known. So-called vane-cell machines achieve almost perfect tightness due to the high dimensional accuracy of the components rotor, housing and wings, which enclose the working space and give the smallest possible gap between the components necessary for the function. In certain applications, the tightness can still be improved by a suitable fluid is brought into the machine and a small fluid film is formed as a sealing body between the components. When performing compression tasks of such machines, the remaining gap losses are accepted. They have the effect of reducing the delivery rate, which can be compensated by increasing the drive power of the compressor. In expansion machines, the gap losses can lead to loss of function, especially if a harmful expansion takes place predominantly over the gap and does not act as Nutzdrehkraft of the rotor.

Hingegen können expandierende Medien in höheren Temperaturbereichen, wie sie bei thermischen Kraftmaschinen auftreten, zur Zerstörung der Maschine führen, indem die durchtretenden heißen Gase an diesen Stellen zerstörende Materialabtragungen bewirken, die die Spalte noch vergrößern.On the other hand, expanding media in higher temperature ranges, such as those found in thermal engines, can destroy the machine by causing the hot gases passing through them to cause destructive material erosion that further enlarges the gaps.

In grundlegenden Untersuchungen von F. Wankel wurde gefunden, dass insbesondere Rotationsbrennkraftmaschinen, die mehr als drei relativ zueinander bewegte Bauteile wie Rotor, am Rotor angeordnete bewegliche Kolbenteile und Gehäuse benutzen, nicht funktionieren können, da Dichtelemente nicht so angeordnet werden können, dass im Bewegungsablauf der Maschine ein in sich geschlossenes räumliches Dichtliniensystem mit gleicher geometrischer Gestalt möglich ist. Anschaulich tritt dieser Defekt bei einer Flügelzellenmaschine auf. Zwar kann durch federnde Dichtleisten entlang der Flügelkanten eine radiale und axiale Abdichtung gegen die Gehäusewand hergestellt werden, aber die Dichtlinie wird im Bereich der Rotornabe durch eine bleibende Unstetigkeit unterbrochen und führt zur Undichtheit der Maschine. Schlussfolgernd aus diesem Erfahrungssatz wurde als bislang einzige funktionierende Rotationskolbenmaschine mit innerer Verbrennung durch F. Wankel ein Motortyp entwickelt, der nur 2 relativ zueinander bewegte, den Arbeitsraum umschließende Bauteile aufweist: ein Gehäuse mit einer trochoidenförmigen Laufbahn und ein ebenfalls von einer Trochoide abgeleiteter Rotationskolben als innerer Hüllkörper der Gehäuselaufbahn. Auf diesem Kolben lassen sich Dichtleisten anordnen, die die Bedingung der unveränderten geometrischen Gestalt erfüllen. Der Motortyp ist als Wankelmotor bekannt geworden.In fundamental investigations by F. Wankel it has been found that, in particular, rotary internal combustion engines which use more than three relatively moving components such as rotor, rotor-mounted movable piston parts and housings can not function, since sealing elements can not be arranged so that in the movement of the Machine is a self-contained spatial sealing line system with the same geometric shape is possible. Illustratively, this defect occurs in a vane machine. Although it can be made by resilient sealing strips along the wing edges a radial and axial seal against the housing wall, but the sealing line is interrupted in the rotor hub by a permanent discontinuity and leads to leakage of the machine. Concluding from this empirical theorem, as the only working rotary piston engine with internal combustion by F. Wankel, a motor type was developed, which has only two components moving around the working space: a housing with a trochoidal raceway and a rotary piston, also derived from a trochoid, as the inner one Enveloping body of the housing track. On this piston can be arranged sealing strips that meet the condition of the unchanged geometric shape. The engine type has become known as a Wankel engine.

Trotz der Vorzüge und der erfolgreichen Entwicklung dieses Motortyps konnten einige technische Zielstellungen nicht erreicht werden. Dies betrifft die geometrisch bedingte Volumenänderung mit der benutzten Trochoide, die die Durchführung eines üblichen Dieselprozesses nicht gestattet. Dies betrifft auch, weniger einschneidend, die Schmierung der Dichtleisten sowie damit in Zusammenhang stehend die Wärmeabfuhr vom Kolben an die Gehäusewand.Despite the merits and successful development of this engine type, some technical objectives could not be achieved. This concerns the geometric volume change with the used trochoid, which does not allow the implementation of a conventional diesel process. This also applies, less intrusive, the lubrication of the Sealing strips and related to the heat dissipation from the piston to the housing wall.

So wird in US-Patent 1,582,922 ein Flügelzellen-Rotor beschrieben, welcher aus zwei Hälften besteht, die durch Druckfedern dichtend an die Seitenflächen des Gehäuses gedrückt werden. Die im Rotor in Führungsschlitzen angeordneten Flügel bestehen aus einem Paket von Lamellen. Durch Zentrifugalkräfte werden diese Lamellen radial nach außen und gleichzeitig die Teile 36 und 37 auch axial an die Gehäusewände gedrückt. Es besteht der Defekt, dass das mittlere Teil sich nicht in axialer Richtung an die betriebsbedingten Änderungen des Gehäuses anpassen kann, es muss mit dem seitlichen Spiel laufen, mit dem es in das Gehäuse eingesetzt wurde. Obwohl sich die Teile 36 und 37 infolge der Zentrifugalkräfte auch an die Seitenwände des Gehäuses anlegen können, verbleiben in den beiden äußeren Ecken eines von zwei Schiebern gebildeten Arbeitsraums zwei umlaufende Leckstellen, das Dichtsystem ist also nicht dicht.So will in U.S. Patent 1,582,922 a vane rotor described which consists of two halves which are pressed by compression springs sealingly against the side surfaces of the housing. The arranged in the rotor in guide slots wings consist of a package of lamellae. By centrifugal forces these blades are pressed radially outward and at the same time the parts 36 and 37 also axially against the housing walls. There is the defect that the middle part can not adapt axially to the operational changes of the housing, it has to run with the lateral play with which it was inserted into the housing. Although the parts 36 and 37 may also be applied to the side walls of the housing due to the centrifugal forces, two circumferential leaks remain in the two outer corners of a working space formed by two slides, so the sealing system is not sealed.

Ebenso kann das offenbarte Dichtsystem für Rotationskolbenmaschinen aus FR 2 571 779 keine geschlossene Dichtlinie erreichen. Das Dichtsystem mit den Teilen 24, 51 und 55 ist in einer Nut angeordnet. An das Teil 24 schließen sich ein oder mehrere gebogene Elemente aus zwei Teilen 53 und 54 an. Zwischen den Teilen 53 und 54 ist eine Druckfeder 55 angeordnet, die für eine Dichtung gegenüber dem Teil 24 sorgen soll. Zwischen den Teilen 24 und 53 stößt Fläche auf Fläche. Durch den Druck des Mediums entsteht an der Fläche eine Kraft, die das gekrümmte Teil wieder zusammendrückt. Das unter einem Druck stehende Medium kann durch Spaltströmung in weitere Arbeitskammern eintreten. Die Anordnung aller Dichtleisten ergibt kein um den Kolben herumführendes geschlossenes Dichtsystem.Likewise, the disclosed sealing system for rotary piston engines can FR 2 571 779 do not reach a closed sealing line. The sealing system with the parts 24, 51 and 55 is arranged in a groove. The part 24 is followed by one or more bent elements of two parts 53 and 54. Between the parts 53 and 54, a compression spring 55 is arranged, which is to provide a seal against the part 24. Between parts 24 and 53 surface abuts surface. The pressure of the medium creates a force on the surface, which compresses the curved part again. The pressurized medium can enter into further working chambers by slit flow. The arrangement of all sealing strips does not give around the piston around leading closed sealing system.

Darstellung der ErfindungPresentation of the invention

Für die Erfindung wird sich die Aufgabe gestellt, ein Abdichtungssystem für Rotationskolbenmaschinen zu schaffen, das das Prinzip der gleichen geometrischen Gestalt der Dichtlinie nach F. Wankel so anwendet, dass auch andere Typen von Rotationskolbenmaschinen für Expansions- und Kompressionsprozesse in höheren Temperaturbereichen sowie mit verbesserten Eigenschaften hinsichtlich der Volumenänderung, der Schmierung und der Wärmabfuhr realisiert werden können.For the invention, the object is to provide a sealing system for rotary piston machines, which applies the principle of the same geometric shape of the sealing line according to F. Wankel that other types of rotary piston machines for expansion and compression processes in higher temperature ranges and with improved properties in terms of volume change, lubrication and heat dissipation can be realized.

Erfindungsgemäß ist das Dichtsystem für Rotationskolbenmaschinen mit einem Rotor, der aus zwei oder mehr parallelen Rotorscheiben besteht, die mit ihren Außenflächen durch Feder-/Medienkräfte an die Stirnseiten eines Gehäuses gedrückt werden, wobei in radial gerichteten Führungsnuten verschiebbare Flügel mit Halbflügeln angeordnet sind, die durch Formlamellen gebildet werden,
dadurch gekennzeichnet, dass
die Halbflügel von Flügelkassetten umschlossen sind, in welchen sie durch innere Schrägkanten der Halbflügel und einen durch Druckfedern aufliegenden Druckkeil, welcher sich in dem von den Halbflügeln gebildeten inneren Raum befindet, gegeneinander verschoben werden, wobei die Formlamellen in ihrer gegenseitigen Überdeckung Dichtkanten bilden, die bei der Rotorbewegung flexibel in die Eckbereiche des Gehäuses reichen und diese abdichten, und sich durch Federkräfte den radialen und axialen Änderungen im Gehäuse anpassen, und somit zusammen mit den Rotorscheiben durchgängige Dichtflächen gegen den Durchtritt des Mediums bilden.According to the invention, the sealing system for rotary piston engines with a rotor consisting of two or more parallel rotor discs, which are pressed with their outer surfaces by spring / media forces on the end faces of a housing, wherein in radially directed guide grooves slidable wings are arranged with half-wings, through Form lamellae are formed,
characterized in that
the half-wings are enclosed by wing cassettes, in which they are displaced by inner bevels of the half-wings and a compression spring resting pressure wedge, which is located in the inner space formed by the half-wings, against each other, wherein the form of blades in their mutual overlap sealing edges, the at the rotor movement flexible rich in the corner regions of the housing and seal them, and adapt by spring forces the radial and axial changes in the housing, and thus form together with the rotor discs continuous sealing surfaces against the passage of the medium.

Der Rotor besteht aus zwei oder mehr parallelen Rotorscheiben, von denen die äußeren, zu den stirnseitigen Gehäusewänden weisenden Scheiben durch Feder- und/oder Gaskräfte so an die Gehäusewand gedrückt werden, dass sie dort mit ihrer Fläche dichtend anliegen und eine Umströmung nicht möglich ist sowie darin, dass die Abdichtung der zwischen den Rotorscheiben entstehenden Fugen durch Dichtleisten innerhalb der Fugen verschlossen werden und diese Dichtleisten an die Dichtleisten, die an der Gehäuselaufbahn anliegen federnd so anschließen, dass sich ein System durchgängiger ebener Dichtlinien ergibt, das keine Unterbrechungen mehr aufweist.The rotor consists of two or more parallel rotor disks, of which the outer, to the front-side housing walls facing discs are pressed by spring and / or gas forces on the housing wall, that there sealingly abut with their surface and a flow around is not possible and in that the sealing of the joints between the rotor disks by sealing strips be sealed within the joints and connect these sealing strips to the sealing strips, which rest against the housing track resiliently so that there is a system continuous planar sealing lines, which has no interruptions.

Die Dichtleisten werden durch Pakete von beweglichen Formlamellen gebildet, die mit sich und zusammen mit den Rotorscheiben Labyrinthdichtungen bilden sowie darin, dass die Lamellenpakete sich mittels Feder- und/oder Medienkräften an die geometrischen Veränderungen der Rotationskolbenmaschine, die im Bewegungsablauf oder durch Drücke und Temperaturen eintreten, anpassen können.The sealing strips are formed by packages of movable mold plates which form labyrinth seals with and together with the rotor disks and in that the disk packs by means of spring and / or media forces to the geometric changes of the rotary piston machine, which occur in the movement or by pressures and temperatures , can customize.

Die Dichtleisten, die am Umfang der Gehäuselaufbahn anliegen, bestehen aus Formlamellen, die sich so gegenseitig überdecken, dass sie Dichtkanten bilden, die bei der Rotorbewegung flexibel in die Eckbereiche des Gehäuses reichen und diese abdichten und darin, dass sich diese Formlamellen durch Federkräfte den radialen und axialen Änderungen im Gehäuse anpassen.The sealing strips, which bear against the circumference of the housing track, consist of mold plates that overlap each other so that they form sealing edges that extend flexibly into the corner regions of the housing during the rotor movement and seal them and that these form slats by spring forces the radial and adjust for axial changes in the housing.

Die Formlamellen haben Schrägkanten, so dass keilförmige Druckelemente mittels Federkraft so auf die Schrägkanten wirken können, dass die Lamellen in beiden Richtungen einer Ebene gegeneinander verschoben werden können und somit die Pakete von Formlamellen Dichtelemente bilden, die sich an den Raum, in dem sie angeordnet sind, nach zwei Richtungen anpassen können.The mold blades have bevelled edges, so that wedge-shaped pressure elements can act by spring force on the beveled edges, that the lamellae can be displaced in both directions of a plane against each other and thus form the packets of mold blades sealing elements, which are located on the space in which they are arranged , can adapt to two directions.

Die Scheibensegmente, aus denen der Rotor zusammengesetzt ist, weisen an den zueinander weisenden Seiten radiale Nuten auf, in die Pakete von Formlamellen eingepasst werden, so dass die Fugen zwischen den Scheibensegmenten durch flexible Labyrinthdichtungen abgedichtet werden. Die Scheibensegmente weisen auf den einander zugekehrten Seiten um die Rotorachse herum Ringnuten auf, in die entweder ein geschlossener Ring eingesetzt werden kann und den Rotor zur Achse hin abdichtet oder ein Scheibensegment einen ringförmigen Rezess hat, der in die gegenüberliegende Ringnute der Gegenscheibe passt und den Rotor zur Achse hin abdichtet.The disk segments from which the rotor is assembled have radial grooves on the sides facing each other into which packets of mold blades are fitted, so that the joints between the disk segments are sealed by flexible labyrinth seals. The disk segments have, on the sides facing each other around the rotor axis, annular grooves in which either a closed ring can be inserted and the rotor seals off towards the axis or a disk segment seals off an annular one Recess has, which fits in the opposite annular groove of the counter-disc and seals the rotor to the axis.

Die Rotorscheiben, die den Kolben bilden, weisen an ihren Außenflächen Ausnehmungen zwischen den Kolbenspitzen auf derart, dass an diesen Ausnehmungen Medienkräfte angreifen können, die den in den Fugen wirkenden Medienkräften entgegen gerichtet sind und so die resultierenden Andruckkräfte gegen die Gehäusewand auf das Maß reduzieren, das die Dichtheit gewährleistet, jedoch die Reibkräfte minimiert.The rotor disks, which form the piston, have recesses between the piston tips on their outer surfaces in such a way that media forces can act on these recesses, which are directed counter to the media forces acting in the joints and thus reduce the resulting pressure forces against the housing wall to the extent that which ensures the tightness, but minimizes friction.

Zwischen den Rotor-Segmentscheiben sind Druckfedern angeordnet, die die Scheiben nach außen drücken, wenn die Maschine im Anlaufvorgang noch nicht die Medienkräfte hat, die die Scheiben auseinander drücken.Between the rotor segment discs compression springs are arranged, which push the discs outwards when the machine does not yet have the media forces during the start-up process, which press the discs apart.

Die Scheibensegmente sind so ausgebildet, dass sie selbst als Formlamelle im Verbund mit weiteren Formlamellen eine Labyrinthabdichtung bilden.The disc segments are designed so that they form a labyrinth seal even as a form of lamella in combination with other form of lamellae.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird an nachfolgenden Beispielen beschrieben. Es bedeuten die Bezeichnungen:The invention will be described by the following examples. The designations mean:

Bild 1 Prinzip der anpassbaren Dichtlinie am FlügelzellenrotorFig. 1 Principle of the adaptable sealing line on the vane rotor

1,21.2
Rotorscheiberotor disc
3,43.4
Flügelteilwing part
55
Führungsnute für FlügelGuide groove for wings
6, 86, 8
Planfläche der Rotorsegmente gegen die Seitenscheiben der MaschinePlanar surface of the rotor segments against the side windows of the machine
7,97.9
Planfläche der Flügel gegen die Seitenscheiben der MaschineFlat surface of the wings against the side windows of the machine
1010
Abdeckring für die Fuge 11 zwischen den RotorsegmentenCover ring for the gap 11 between the rotor segments
1111
Fuge zwischen den RotorsegmentenJoint between the rotor segments
Bild 2a FlügelzellenrotorFigure 2a vane rotor

12,1312.13
Rotorscheiberotor disc
1414
Druckfedern zwischen den zwischen den RotorsegmentenCompression springs between the between the rotor segments
1515
Bohrungen in den Rotorsegmenten zur Aufnahme der Druckfedern 14Holes in the rotor segments for receiving the compression springs 14th
1616
Aufnahmebohrung für die Nabe am RotorsegmentMounting hole for the hub on the rotor segment
1717
Nabe am RotorsegmentHub on the rotor segment
1818
Schlitz in den Rotorsegmenten zur Aufnahme der FlügelSlot in the rotor segments for receiving the wings
1919
Fuge zwischen den RotorsegmentenJoint between the rotor segments
Bild 2b FlügelkassetteFigure 2b Wing cassette

2020
Flügelkassettewing cassette
21, 2221, 22
Halbflügel mit innerer SchrägkanteHalf wing with inner bevel
2323
innere Schrägkanteinner bevel
2424
Druckkeilpressure wedge
2525
Druckfederncompression springs
2626
Kassettenhülle zur Aufnahme der Flügelteile 21, 22, 24, 25Cassette cover for receiving the wing parts 21, 22, 24, 25
2727
Bohrungen zur Aufnahme der Druckfedern 25Holes for receiving the compression springs 25th
Ausführung der ErfindungEmbodiment of the invention

Bild 1: Das Prinzip der Abdichtung wird anhand Bild 1 beschrieben. Der Rotor der Maschine ist in die beiden Rotorscheiben 1 und 2 getrennt, die mit ihren Außenflächen 6 und 8 durch Feder-/Medienkräfte an die Stirnseiten des Gehäuses gedrückt werden und so den Rotor gegen das Gehäuse abdichten. Die Fuge 11 zwischen den Segmentscheiben wird nach innen zur Rotorwelle hin durch eine umlaufende Abdeckung 10 verschlossen. Mit der Abdeckung 10 sind die Führungsnuten 5 verbunden, in denen Flügelteile 3, 4 sitzen, die einen Flügel des Flügelzellenrotors bilden. Die Flügel 3, 4 werden durch Formlamellen gebildet, die sich den geometrischen Änderungen anpassen können.Figure 1: The principle of the seal is described with reference to Figure 1. The rotor of the machine is separated into the two rotor disks 1 and 2, which are pressed with their outer surfaces 6 and 8 by spring / media forces on the end faces of the housing and thus seal the rotor against the housing. The gap 11 between the segment discs is closed inwardly towards the rotor shaft by a peripheral cover 10. With the cover 10, the guide grooves 5 are connected, in which wing parts 3, 4 sit, which form a wing of the vane cell rotor. The wings 3, 4 are formed by form of slats, which can adapt to the geometric changes.

Die Realisierung dieses Abdichtungsprinzips wird anhand einer Ausführung nach den Bildern 2a, 2b und 2c beschrieben.The realization of this sealing principle will be described by means of an embodiment according to FIGS. 2a, 2b and 2c.

Bild 2a: Der Rotor des Flügelzellenrotors besteht aus den Rotorscheiben 12 und 13, die durch Federn 14 auseinander gedrückt werden und so an den Stirnseiten des Gehäuses dichtend anliegen. Die Federn befinden sich in den (nicht durchgehenden) Bohrungen 15 in beiden Segmentscheiben. Zwischen den Segmentscheiben befindet sich die Trennfuge 19. Die Rotorscheibe 12 greift mit der Nabe 17 in die Aufnahme 16 der Rotorscheibe 13 ein und Verschließt die Trennfuge 19, entsprechend der Abdeckung 10 nach Bild 1. Die Schlitze 18 in den Rotorscheiben 12 und 13 entsprechen den Führungsnuten 5 nach Bild 1.Figure 2a: The rotor of the vane-cell rotor consists of the rotor disks 12 and 13, which are pressed apart by springs 14 and thus sealingly abut against the front sides of the housing. The springs are located in the (non-continuous) holes 15 in both segment discs. The rotor disk 12 engages with the hub 17 in the receptacle 16 of the rotor disk 13 and closes the parting line 19, corresponding to the cover 10 according to Figure 1. The slots 18 in the rotor disks 12 and 13 correspond to the Guide grooves 5 as shown in Figure 1.

Bild 2b: In den Schlitzen 18 des Rotors befinden sich die Flügelkassetten 20, die sich aufgrund ihrer inneren Federkräfte in radialer Richtung an die Gehäuselaufbahn und in axialer Richtung an die Stirnseiten des Gehäuses anpassen und sich zugleich auch in die Ecken zwischen beiden Laufflächen des Gehäuses erstrecken und diese abdichten.Fig. 2b: In the slots 18 of the rotor there are the wing cassettes 20 which, due to their internal spring forces, adapt in the radial direction to the housing track and in the axial direction to the front sides of the housing and at the same time extend into the corners between the two raceways of the housing and seal them off.

In einer Flügelkassette befinden sich die beiden baugleichen Halbflügel 21 und 22, die so aufeinandergelegt werden, dass sie gegeneinander verschoben werden können und somit an den Stirnseiten des Gehäuses als Abdichtung zur Anlage kommen. In dieser Stellung bilden sie mit den Rotorscheiben 12 und 13 durchgängige Dichtflächen gegen den Durchtritt des Mediums. Die Andruckkraft der Halbflügel 21 und 22 für diese Anlage wird durch die inneren Schrägkanten 23 und den durch die Druckfeder 25 aufliegenden Druckkeil 24 erreicht. Der Druckkeil 24 befindet sich in dem von den Halbflügeln 21 und 22 gebildeten inneren Raum. Die Druckfeder 25 stützt sich gegen den Boden der Kassettenhülle 26 ab. Die radiale dichtende Bewegung der Halbflügel 21 und 22 im Drehverlauf des Rotors wird zusätzlich durch die Federn 25 erreicht.In a wing cassette, the two identical half-wings 21 and 22, which are stacked so that they can be moved against each other and thus come to the front sides of the housing as a seal to the plant. In this position they form with the rotor disks 12 and 13 continuous sealing surfaces against the passage of the medium. The pressure force of the half-wings 21 and 22 for this system is achieved by the inner beveled edges 23 and the pressure wedge 24 resting on the compression spring 25. The pressure wedge 24 is located in the inner space formed by the half-wings 21 and 22. The compression spring 25 is supported against the bottom of the cassette shell 26. The radial sealing movement of the half-wings 21 and 22 in the rotation of the rotor is additionally achieved by the springs 25.

Bild 2c: Bild 2c zeigt die ineinander steckenden Rotorscheiben 12 und 13 mit einer Flügelkassette 20 in dem Schlitz 18 in Rotor.Figure 2c: Figure 2c shows the nested rotor discs 12 and 13 with a wing cassette 20 in the slot 18 in the rotor.

Hier nicht weiter gezeigte Ausnehmungen an den Außenseiten der Kolbensegmente bewirken, dass die Medienkräfte, die in den Trennfugen der Rotorscheiben als nach den Stirnseiten des Rotors hin wirkende Reibkräfte wirken, weitgehend durch von außen wirkende Medienkräfte kompensiert werden.Caused not shown here recesses on the outer sides of the piston segments, that the media forces acting in the parting lines of the rotor disks as acting after the end faces of the rotor towards frictional forces, are largely compensated by acting from the outside media forces.

Claims (3)

  1. Sealing system for rotary piston engines having a rotor which consists of two or more parallel rotor discs (12, 13) which are pushed with their outer faces onto the end sides of a housing by way of spring/media forces, displaceable blades with half blades (21, 22) which are formed by shaped slats being arranged in radially directed guide grooves (5, 18), characterized in that the half blades (21, 22) are enclosed by blade cassettes (20), in which they are displaced against one another by way of inner oblique edges (23) of the half blades (21, 22) and a pressure wedge (24) which is in contact as a result of compression springs (25) and is situated in the inner space which is formed by the half blades (21, 22), the shaped slats forming sealing edges in their mutual overlap, which sealing edges reach flexibly into the corner regions of the housing during the rotor movement and seal the said corner regions, and adapt themselves to the radial and axial changes in the housing by way of spring forces and therefore, together with the rotor discs (12, 13), form continuous sealing surfaces against the passage of the medium.
  2. Sealing system according to Claim 1, characterized in that the compression spring (25) is arranged between the pressure wedge (24) and the bottom of the blade cassette (20).
  3. Sealing system of rotary piston engines according to Claim 1 or 2, characterized in that, on the end sides which point towards the housing wall, the rotor discs (12, 13) have full-area recesses in the region of the outer edge, with the result that forces are generated by way of the media pressure, which forces counteract the media and spring forces which act in the joints (19) between the rotor discs (12, 13), and therefore reduce the friction on the end faces which point towards the housing wall to the amount which is required for the sealing action.
EP07822696.6A 2006-12-02 2007-11-19 System for sealing the piston of rotary piston machines Not-in-force EP2100009B1 (en)

Priority Applications (1)

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EP11179629.8A EP2450530B1 (en) 2006-12-02 2007-11-19 Device for sealing the pistons of rotating reciprocating engine

Applications Claiming Priority (2)

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DE102006057003A DE102006057003A1 (en) 2006-12-02 2006-12-02 Principle and system for sealing the piston of rotary piston engines
PCT/EP2007/062488 WO2008065017A1 (en) 2006-12-02 2007-11-19 System for sealing the piston of rotary piston machines

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP11179629.8A Division EP2450530B1 (en) 2006-12-02 2007-11-19 Device for sealing the pistons of rotating reciprocating engine
EP11179629.8A Division-Into EP2450530B1 (en) 2006-12-02 2007-11-19 Device for sealing the pistons of rotating reciprocating engine

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EP2100009A1 EP2100009A1 (en) 2009-09-16
EP2100009B1 true EP2100009B1 (en) 2016-03-16

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EP07822696.6A Not-in-force EP2100009B1 (en) 2006-12-02 2007-11-19 System for sealing the piston of rotary piston machines

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EP (2) EP2450530B1 (en)
JP (1) JP4926252B2 (en)
KR (1) KR20090096497A (en)
CN (1) CN101558218B (en)
AU (1) AU2007326323B2 (en)
BR (1) BRPI0719694A2 (en)
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DE (1) DE102006057003A1 (en)
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Publication number Publication date
EP2450530B1 (en) 2016-03-23
EP2100009A1 (en) 2009-09-16
WO2008065017A1 (en) 2008-06-05
AU2007326323B2 (en) 2013-08-01
DE102006057003A1 (en) 2008-06-05
CN101558218A (en) 2009-10-14
CA2671017C (en) 2014-01-21
AU2007326323A1 (en) 2008-06-05
JP2010511822A (en) 2010-04-15
RU2463458C2 (en) 2012-10-10
US20100150762A1 (en) 2010-06-17
KR20090096497A (en) 2009-09-10
CN101558218B (en) 2012-03-21
US8920147B2 (en) 2014-12-30
BRPI0719694A2 (en) 2013-12-24
CA2671017A1 (en) 2008-06-05
EP2450530A1 (en) 2012-05-09
JP4926252B2 (en) 2012-05-09
RU2009125224A (en) 2011-01-10

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