EP0906512B1 - Vane pump - Google Patents

Vane pump Download PDF

Info

Publication number
EP0906512B1
EP0906512B1 EP97929260A EP97929260A EP0906512B1 EP 0906512 B1 EP0906512 B1 EP 0906512B1 EP 97929260 A EP97929260 A EP 97929260A EP 97929260 A EP97929260 A EP 97929260A EP 0906512 B1 EP0906512 B1 EP 0906512B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure plate
vane pump
region
opposite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97929260A
Other languages
German (de)
French (fr)
Other versions
EP0906512A1 (en
Inventor
Ivo Agner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LuK Fahrzeug Hydraulik GmbH and Co KG
Original Assignee
LuK Fahrzeug Hydraulik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE29612578U external-priority patent/DE29612578U1/en
Application filed by LuK Fahrzeug Hydraulik GmbH and Co KG filed Critical LuK Fahrzeug Hydraulik GmbH and Co KG
Publication of EP0906512A1 publication Critical patent/EP0906512A1/en
Application granted granted Critical
Publication of EP0906512B1 publication Critical patent/EP0906512B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023Axial sealings for working fluid

Definitions

  • the invention relates to a vane pump according to Preamble of claim 1.
  • Vane pumps of the type mentioned here are known from DE 28 35 816 A1. You assign one Rotor on, in the peripheral wall wings receiving slots are introduced. The rotor rotates within a contour ring, the preferably forms two crescent-shaped conveying spaces, that are passed through by the wings. In the Rotation of the rotor results in bigger and smaller becoming spaces. In operation of the vane pump there are suction and pressure areas. at a contour ring of the type mentioned here there are two separate pump sections with each a suction and a pressure area.
  • the side of the print area is limited on the outlet or delivery side by means of a close-fitting pressure plate and on the Conveyor side opposite side for example through the housing of the vane pump.
  • the vane pump has two tight pressure plates on the rotor, with the An opening is located on the delivery side opposite the pressure plate having a fluid connection between a preferably lower pressure range and one creates a closed pressure chamber. This will a pressure built up in this pressure chamber, which the The pressure plate bends slightly towards the rotor and presses close to the rotor. The one in the funding area built up pressure leads in the same way to a Acting on the pressure plate on the conveyor side a force that pushes this pressure plate close to the rotor presses.
  • the Fluid connection in the opposite of the delivery side Pressure plate a passage area that less than 1/3 of the passage area of the outlet opening the delivery-side pressure plate.
  • the Invention has the closing the pressure chamber Pressure plate that has an opening for connecting the includes lower pressure area with the pressure chamber, a further relatively small opening that from Pressure room in the other overhead Print area opens.
  • an opening is provided which is built in Location of the upper pressure area with the pressure chamber combines.
  • the print area below is sealed by the pressure plate to the pressure chamber.
  • An advantageous embodiment also consists in the pressure plate opposite the delivery side to be provided with two openings, each one Connection between a print area and the Establish pressure room and the high hydraulic Exhibit resistance. The sum of the two Resistance must exceed a value that to avoid a short circuit in the cold start phase necessary is.
  • FIG. 1 For a better understanding, let's start with general based on Figure 1 on the structure of a vane pump To be received.
  • This includes a housing 1, in which a channel leading to an outlet 3 is provided.
  • a consumer for example a power steering device with a fluid, for example hydraulic oil.
  • the housing has a circular interior 5 on which receives a contour ring 7 and a rotor 9, in the peripheral surface wing 8 receiving Slots are introduced.
  • the rotor 9 is over a drive shaft 11 rotated so that the wings 8 move within the contour ring 7, whose interior 5 is designed so that two crescent-shaped, also referred to as production rooms Open spaces are formed by the wings be run through. Between two circumferentially seen - neighboring wings are so-called Vane cells when the rotor rotates get smaller and bigger. This will Suction and pressure areas formed.
  • the end faces the contour ring 7 and the rotor 9 are applied Sealing surfaces on the pressure plates 17.1 and 17.2 be formed.
  • the vane pump is designed so that Hydraulic oil in the pressure area to the inside of the Rotors lying undersides of the wing - the so-called Under wing area - and this with Pressure applied. Through the in the lower wing area prevailing overpressure are the wings from the Slits are pressed radially outwards and thus lie sealing on the inside of the contour ring.
  • FIG. 2a shows an essentially annular groove 25 intended for the lower wing areas.
  • FIG. 2b shows an essentially annular groove 25 intended for the lower wing areas.
  • four independent, essentially ring segment-shaped Grooves 27 formed.
  • Figure 2a shows that the kidney-shaped Pressure areas 23 of the pressure plate on the pressure chamber side 17.2 merge into round channels 29. At least one or both channels 29 have a passage area, that is, flowed through cross-sectional area, that less than a 1/3 of the passage area of the Pressure areas 23 of the delivery-side pressure plate 17.1.
  • the vane pump according to Figure 3a has both on the outlet or delivery side F of the rotor as also on the opposite pressure chamber side D a pressure plate 17.1 or 17.2. Both pressure plates 17 lie close to the contour ring and rotor 51 and are said to have a leakage of Prevent hydraulic oil from the pressure areas.
  • the representation of the delivery-side pressure plate 17.1 in Figure 3a leaves two outlet channels 53.1 and 53.2 recognize each having a fluid connection between a pressure area and a conveyor respectively Create outlet area 55.
  • the pressure chamber side is on the opposite side Pressure plate 17.2 on the rotor 51.
  • she also has a channel 59, which is a fluid connection between a pressure range lower in the figure UD and a pressure chamber 61 produces.
  • This pressure chamber 61 is on the one hand by the pressure plate side pressure plate 17.2 and on the other hand formed by the housing.
  • the embodiment shown in Figure 3b differs different from the one just described in that the opening into the lower wing area Opening 63 not in the pressure plate on the pressure chamber side 17.2 but in the delivery pressure plate 17.1 is provided.
  • the Channel 59 of the pressure plate 17.2 not the lower one Print area but assigned to the upper print area. A change in the way the two work This results in pressure plates after the start-up phase However not.
  • FIG. 3c A third embodiment can be seen in FIG. 3c, which essentially corresponds to that in FIG 3a embodiment corresponds.
  • the pressure plate side pressure plate 17.2 a small, in essential ventilation channel 65 is provided, the connection between the Pressure chamber 61 and the upper pressure area creates.
  • the cross section of the channel 65 is dimensioned so that that its hydraulic resistance in particular for cold hydraulic oil with high viscosity is very large. Resistance should be on everyone Case be so large that in the cold start phase Oil flow from the lower pressure range over the pressure chamber 61 and the channel 65 in the upper pressure range, where the short circuit prevails, and then into the suction area is almost prevented.
  • this ventilation channel 65 exists in accumulating in the upper area of the pressure chamber 61 To let air escape. Therefore this is Vent channel 65 the overhead pressure area assigned. Through the ventilation achieved with it the pressure chamber 61 can reduce noise achieve.
  • Figure 3d shows a further embodiment, in which the pressure plate side pressure plate 17.2 two Has channels 71.
  • the upper channel 71.1 connects the upper pressure area with the pressure chamber 61, the lower channel 71.2 the lower pressure range with the Pressure chamber 61.
  • the cross sections of the two channels 71 are chosen so that the sum of the two individual hydraulic resistors for a viscous, cold oil is so big that almost no oil flow between the two pressure ranges developed by the pressure chamber 61.
  • this pump is related to the venting function regardless of location, since each is in the upper Area of the pressure chamber regardless of the installation position there is a ventilation duct through which the accumulating air can escape.
  • FIGS. 3e and 3f show two further exemplary embodiments shown how a pressure room side hydraulic resistance can be realized, for example instead of according to the small cross sections Figure 3d, can be used. So you can on the one hand provide a web 77 on the housing, which Oil flow in the cold start phase between lower and limited upper pressure range. In addition to the arrangement of the web 77 on the housing is of course also can be formed on the pressure plate 17.2, as in FIG. 3f shown. Other configurations are of course also possible hydraulic resistance is conceivable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Description

Die Erfindung betrifft eine Flügelzellenpumpe gemäß Oberbegriff des Anspruchs 1.The invention relates to a vane pump according to Preamble of claim 1.

Flügelzellenpumpen der hier angesprochenen Art sind aus der DE 28 35 816 A1 bekannt. Sie weisen einen Rotor auf, in dessen Umfangswandung Flügel aufnehmende Schlitze eingebracht sind. Der Rotor dreht sich innerhalb eines Konturrings, der vorzugsweise zwei sichelförmige Förderräume bildet, die von den Flügeln durchlaufen werden. Bei der Drehung des Rotors ergeben sich größer und kleiner werdende Räume. Im Betrieb der Flügelzellenpumpe ergeben sich somit Saug- und Druckbereiche. Bei einem Konturring der hier angesprochenen Art ergeben sich zwei getrennte Pumpenabschnitte mit je einem Saug- und einem Druckbereich.Vane pumps of the type mentioned here are known from DE 28 35 816 A1. You assign one Rotor on, in the peripheral wall wings receiving slots are introduced. The rotor rotates within a contour ring, the preferably forms two crescent-shaped conveying spaces, that are passed through by the wings. In the Rotation of the rotor results in bigger and smaller becoming spaces. In operation of the vane pump there are suction and pressure areas. at a contour ring of the type mentioned here there are two separate pump sections with each a suction and a pressure area.

Die seitliche Begrenzung des Druckbereichs erfolgt auf der Auslaß- beziehungsweise Förderseite mittels einer dicht anliegenden Druckplatte und auf der der Förderseite gegenüberliegenden Seite beispielsweise durch das Gehäuse der Flügelzellenpumpe. The side of the print area is limited on the outlet or delivery side by means of a close-fitting pressure plate and on the Conveyor side opposite side for example through the housing of the vane pump.

Wird eine Flügelzellenpumpe betriebswarm stillgesetzt, gleiten die obenliegenden Flügel aufgrund ihrer Schwerkraft in die in den Rotor eingebrachten Schlitze. Dadurch entfällt die zwischen Saug- und Druckbereich gegebene Trennung, es entsteht quasi ein Kurzschluß in einem, nämlich im oberen Pumpenabschnitt. Auf der gegenüberliegenden Seite gleiten die Flügel der Schwerkraft folgend aus ihren Schlitzen heraus, oder sie bleiben draußen, so daß hier die Trennung erhalten bleibt.If a vane pump is stopped at operating temperature, slide due to the overhead wings gravity into the rotor Slots. This eliminates the between suction and Separation given the pressure range, it is created a short circuit in one, namely in the upper pump section. Glide on the opposite side the wings following gravity out of theirs Slits out or they stay outside so that here the separation is preserved.

Erkaltet nun das von der Flügelzellenpumpe geförderte Fluid, beispielsweise Hydrauliköl, erhöht sich dessen Viskosität, so daß die Beweglichkeit der Flügel nachläßt. Bei Inbetriebnahme der Pumpe fördert zwar der noch getrennte Pumpenabschnitt das Fluid. Die Förderleistung ist jedoch stark reduziert, da eine hydraulische Verbindung zwischen dem fördernden unteren Druckbereich zum gegenüberliegenden oberen Druckbereich und dort zum Saugbereich besteht.Now cools the pumped by the vane pump Fluid, for example hydraulic oil, increased its viscosity so that mobility the wing wears off. When starting up the pump the still separate pump section promotes this Fluid. However, the delivery rate is greatly reduced, because a hydraulic connection between the promoting lower pressure range to the opposite upper pressure area and there to the suction area consists.

Bei der Abdichtung der Druckbereiche durch das Gehäuse tritt häufig eine unerwünschte Leckage auf, da sich das Gehäuse durch den innerhalb des Konturrings herrschenden Druck vom Rotor wegbiegt und so eine Vergrößerung des Leckagespalts auftritt. Eine Verringerung der Leckage wird dadurch erzielt, daß statt der Abdichtung durch das Gehäuse eine weitere Druckplatte Verwendung findet. Diese ist im wesentlichen identisch wie die auslaß- bzw. förderseitige Druckplatte ausgebildet und weist jeweils in die Druckbereiche der beiden Pumpenabschnitte mündenden Kanäle auf, die eine Verbindung mit einem zwischen Druckplatte und Gehäuse gebildeten Druckraum herstellen.When the pressure areas are sealed by the housing undesirable leakage often occurs, since the housing is defined by the inside of the contour ring prevailing pressure away from the rotor and so an increase in the leakage gap occurs. A Leakage reduction is achieved in that instead of sealing by the housing another Pressure plate is used. This is essentially identical to the discharge or delivery side Pressure plate formed and points in each case Pressure ranges of the two pump sections open Channels that connect to one between Establish pressure plate and housing formed pressure chamber.

Das erwähnte Problem des Kurzschlusses beim Anlaufen der Pumpe tritt verstärkt bei dieser Ausführungsform auf, da neben der förderseitigen Verbindung zwischen den Druckbereichen auch auf der der Förderseite gegenüberliegenden Seite eine entsprechende hydraulische Verbindung besteht.The problem of short-circuit when starting the pump occurs increasingly in this embodiment on because next to the connection on the conveyor side between the print areas also on the Conveyor side opposite side a corresponding hydraulic connection exists.

Es ist daher Aufgabe der Erfindung, eine Flügelzellenpumpe zu schaffen, die sehr gute Kaltstarteigenschaften aufweist und darüber hinaus eine sehr geringe Leckageneigung besitzt.It is therefore an object of the invention to provide a vane pump to create the very good cold start properties has and also a very low Has a tendency to leak.

Diese Aufgabe wird mit Hilfe einer Flügelzellenpumpe gelöst, die die in Anspruch 1 genannten Merkmale umfaßt. Die Flügelzellenpumpe weist zwei dicht am Rotor anliegende Druckplatten auf, wobei die der Förderseite gegenüberliegende Druckplatte eine Öffnung aufweist, die eine Fluid-Verbindung zwischen einem vorzugsweise unteren Druckbereich und einem abgeschlossenen Druckraum herstellt. Dadurch wird in diesem Druckraum ein Druck aufgebaut, der die Druckplatte etwas zum Rotor hin durchbiegt und dicht an den Rotor andrückt. Der im Förderbereich aufgebaute Druck führt in gleicher Weise zu einer Beaufschlagung der förderseitigen Druckplatte mit einer Kraft, die diese Druckplatte dicht an den Rotor andrückt. Darüber hinaus wird ein Kurzschluß zwischen den beiden Druckbereichen über den Druckraum dadurch vermieden, daß lediglich einer der beiden Druckbereiche in der der Förderseite gegenüberliegenden Druckplatte mit dem Druckraum verbunden ist. Der andere Druckbereich der Pumpe wird durch die Druckplatte zum Druckraum hin abgedichtet.This task is accomplished with the help of a vane pump solved the features mentioned in claim 1 includes. The vane pump has two tight pressure plates on the rotor, with the An opening is located on the delivery side opposite the pressure plate having a fluid connection between a preferably lower pressure range and one creates a closed pressure chamber. This will a pressure built up in this pressure chamber, which the The pressure plate bends slightly towards the rotor and presses close to the rotor. The one in the funding area built up pressure leads in the same way to a Acting on the pressure plate on the conveyor side a force that pushes this pressure plate close to the rotor presses. In addition, there will be a short circuit between the two pressure areas over the pressure space thereby avoided that only one of the two pressure areas in the opposite of the delivery side Pressure plate connected to the pressure chamber is. The other pressure range of the pump is sealed by the pressure plate to the pressure chamber.

In einer vorteilhaften Ausführungsform hat die Fluid-Verbindung in der der Förderseite gegenüberliegenden Druckplatte eine Durchtrittsfläche, die kleiner als 1/3 der Durchtrittsfläche der Auslaßöffnung der förderseitigen Druckplatte ist.In an advantageous embodiment, the Fluid connection in the opposite of the delivery side Pressure plate a passage area that less than 1/3 of the passage area of the outlet opening the delivery-side pressure plate.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung weist die den Druckraum abschließende Druckplatte, die eine Öffnung zur Verbindung des unteren Druckbereich mit dem Druckraum umfaßt, eine weitere verhältnismäßig kleine Öffnung auf, die vom Druckraum in den anderen oben liegenden Druckbereich mündet. Mit Hilfe dieser Öffnung läßt sich eine Entlüftung des Druckraums bei der Erstinbetriebnahme der Pumpe bewerkstelligen, mit dem vorteilhaften Ergebnis einer Geräuschverminderung. Um einen Kurzschluß über diese Entlüftungsöffnung zu verhindern, muß sie so ausgebildet sein, daß sie für ein kaltes Fluid hoher Viskosität einen sehr hohen hydraulischen Widerstand besitzt.In a further advantageous embodiment of the Invention has the closing the pressure chamber Pressure plate that has an opening for connecting the includes lower pressure area with the pressure chamber, a further relatively small opening that from Pressure room in the other overhead Print area opens. With the help of this opening leaves venting of the pressure chamber during initial commissioning of the pump with which advantageous result of noise reduction. A short circuit through this vent to prevent it must be designed so that it for a cold fluid of high viscosity a very has high hydraulic resistance.

In einer weiteren vorteilhaften Ausgestaltung ist an der der Förderseite gegenüberliegenden Druckplatte eine Öffnung vorgesehen, die den in eingebauter Lage oberen Druckbereich mit dem Druckraum verbindet. Der unten liegende Druckbereich ist durch die Druckplatte zum Druckraum hin abgedichtet.In a further advantageous embodiment on the pressure plate opposite the delivery side an opening is provided which is built in Location of the upper pressure area with the pressure chamber combines. The print area below is sealed by the pressure plate to the pressure chamber.

Eine vorteilhafte Ausgestaltung besteht auch darin, die der Förderseite gegenüberliegende Druckplatte mit zwei Öffnungen zu versehen, die jeweils eine Verbindung zwischen einem Druckbereich und dem Druckraum herstellen und die einen hohen hydraulischen Widerstand aufweisen. Die Summe der beiden Widerstände muß dabei einen Wert übersteigen, der zur Vermeidung eines Kurzschlusses in der Kaltstartphase notwendig ist.An advantageous embodiment also consists in the pressure plate opposite the delivery side to be provided with two openings, each one Connection between a print area and the Establish pressure room and the high hydraulic Exhibit resistance. The sum of the two Resistance must exceed a value that to avoid a short circuit in the cold start phase necessary is.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous embodiments of the invention result from the subclaims.

Die Erfindung wird anhand von Ausführungsbeispielen mit Bezug auf die Zeichnung näher erläutert. Dabei zeigen:

Figur 1
eine schematische Schnittdarstellung einer Flügelzellenpumpe;
Figuren 2a, 2b
zwei Druckplatten der Flügelzellenpumpe, und
Figuren 3a - 3f
schematische Darstellungen von vier unterschiedlich ausgestalteten Flügelzellenpumpen.
The invention is explained in more detail using exemplary embodiments with reference to the drawing. Show:
Figure 1
is a schematic sectional view of a vane pump;
Figures 2a, 2b
two pressure plates of the vane pump, and
Figures 3a - 3f
schematic representations of four differently designed vane pumps.

Zum besseren Verständnis soll zunächst allgemein anhand von Figur 1 auf den Aufbau einer Fügelzellenpumpe eingegangen werden. Diese umfaßt ein Gehäuse 1, in dem ein zu einem Auslaß führender Kanal 3 vorgesehen ist. Über den Auslaß wird ein Verbraucher, beispielsweise eine Lenkhelfeinrichtung, mit einem Fluid, beispielsweise Hydrauliköl versorgt.For a better understanding, let's start with general based on Figure 1 on the structure of a vane pump To be received. This includes a housing 1, in which a channel leading to an outlet 3 is provided. Through the outlet, a consumer for example a power steering device with a fluid, for example hydraulic oil.

Das Gehäuse weist einen kreisrunden Innenraum 5 auf, der einen Konturring 7 und einen Rotor 9 aufnimmt, in dessen Umfangsfläche Flügel 8 aufnehmende Schlitze eingebracht sind. Der Rotor 9 wird über eine Antriebswelle 11 in Rotation versetzt, so daß sich die Flügel 8 innerhalb des Konturrings 7 bewegen, dessen Innenraum 5 so ausgestaltet ist, daß zwei sichelförmige, auch als Förderräume bezeichnete Freiräume gebildet werden, die von den Flügeln durchlaufen werden. Zwischen je zwei -in Umfangsrichtung gesehen- benachbarten Flügeln liegen sogenannte Flügelzellen, die bei einer Drehung des Rotors kleiner und größer werden. Dadurch werden Saug- und Druckbereiche gebildet. Die Stirnflächen des Konturringes 7 und des Rotors 9 liegen an Dichtflächen an, die von Druckplatten 17.1 und 17.2 gebildet werden. Im folgenden wird die der Förderseite zugewandte Druckplatte 17.1 als förderseitige Druckplatte und die andere Druckplatte 17.2 als druckkammerseitige Druckplatte bezeichnet. Die aus den beiden Druckplatten 17.1 und 17.2, dem Konturring 7 und dem Rotor 9 gebildete Einheit liegt somit im Innenraum 5 des Gehäuses. Zumindest die dem Kanal 3 beziehungsweise Auslaß zugewandte förderseitige Druckplatte 17.1 ist so ausgebildet, daß das von den Flügelzellen geförderte Hydrauliköl durch die Druckplatte hindurch gefördert wird und in einen zwischen der Druckplatte und der Gehäuseinnenseite gebildeten Auslaßbereich und von dort zum Verbraucher gelangt.The housing has a circular interior 5 on which receives a contour ring 7 and a rotor 9, in the peripheral surface wing 8 receiving Slots are introduced. The rotor 9 is over a drive shaft 11 rotated so that the wings 8 move within the contour ring 7, whose interior 5 is designed so that two crescent-shaped, also referred to as production rooms Open spaces are formed by the wings be run through. Between two circumferentially seen - neighboring wings are so-called Vane cells when the rotor rotates get smaller and bigger. This will Suction and pressure areas formed. The end faces the contour ring 7 and the rotor 9 are applied Sealing surfaces on the pressure plates 17.1 and 17.2 be formed. The following is that of the funding side facing pressure plate 17.1 as the conveyor side Pressure plate and the other pressure plate 17.2 as pressure plate on the pressure chamber side. From the two pressure plates 17.1 and 17.2, the contour ring 7 and the rotor 9 formed unit is thus in the interior 5 of the housing. At least that Channel 3 or outlet facing the conveyor Pressure plate 17.1 is designed so that the hydraulic oil produced by the vane cells is conveyed through the pressure plate and into one between the pressure plate and the inside of the housing formed outlet area and from there reached the consumer.

Die Flügelzellenpumpe ist so aufgebaut, daß das Hydrauliköl im Druckbereich zu den im Inneren des Rotors liegenden Unterseiten der Flügel -dem sogenannten Unterflügelbereich- gelangt und diese mit Druck beaufschlagt. Durch den im Unterflügelbereich herrschenden Überdruck werden die Flügel aus den Schlitzen radial nach außen gepreßt und liegen somit dichtend an der Innenseite des Konturrings an.The vane pump is designed so that Hydraulic oil in the pressure area to the inside of the Rotors lying undersides of the wing - the so-called Under wing area - and this with Pressure applied. Through the in the lower wing area prevailing overpressure are the wings from the Slits are pressed radially outwards and thus lie sealing on the inside of the contour ring.

Die dem Rotor 9 zugewandten Flächen der beiden Druckplatten 17.1 und 17.2 sind in Figur 2a beziehungsweise 2b in Draufsicht dargestellt. Deutlich zu erkennen sind jeweils zwei Ansaugbereiche 21 und zwei nierenförmige Druckbereiche 23. Weiter innen ist in der druckraumseitigen Druckplatte 17.2 gemäß Figur 2a eine im wesentlichen ringförmige Nut 25 für die Unterflügelbereiche vorgesehen. In der förderseitigen Druckplatte 17.1 gemäß Figur 2b sind dagegen vier unabhängige im wesentlichen ringsegmentförmige Nuten 27 ausgebildet.The surfaces of the two facing the rotor 9 Pressure plates 17.1 and 17.2 are shown in Figure 2a and 2b shown in plan view. Clear Two suction areas 21 and two kidney-shaped pressure areas 23. Further inside is according to pressure plate 17.2 on the pressure chamber side FIG. 2a shows an essentially annular groove 25 intended for the lower wing areas. In the funding side Pressure plate 17.1 according to Figure 2b in contrast, four independent, essentially ring segment-shaped Grooves 27 formed.

Figur 2a läßt noch erkennen, daß die nierenförmigen Druckbereiche 23 der druckraumseitigen Druckplatte 17.2 in runde Kanäle 29 übergehen. Wenigstens einer oder beide Kanäle 29 weisen eine Durchtrittsfläche, das heißt durchströmte Querschnittsfläche, auf, die weniger als ein 1/3 der Durchtrittsfläche der Druckbereiche 23 der förderseitigen Druckplatte 17.1 betragen.Figure 2a shows that the kidney-shaped Pressure areas 23 of the pressure plate on the pressure chamber side 17.2 merge into round channels 29. At least one or both channels 29 have a passage area, that is, flowed through cross-sectional area, that less than a 1/3 of the passage area of the Pressure areas 23 of the delivery-side pressure plate 17.1.

In Figur 3 sind stark vereinfacht vier unterschiedliche Ausführungsformen der Flügelzellenpumpe dargestellt, wobei es im wesentlichen auf die unterschiedlichen Ausgestaltungen der Druckplatten ankommt. Die übrigen Details, insbesondere Rotor, Flügel, Welle etc. sind aus diesem Grund nicht dargestellt.In Figure 3, four different ones are greatly simplified Illustrated embodiments of the vane pump, being essentially different Designs of the printing plates arrives. The rest of the details, especially the rotor, Wings, shafts etc. are not shown for this reason.

Die Flügelzellenpumpe gemäß Figur 3a weist sowohl auf der Auslaß- oder Förderseite F des Rotors als auch auf der gegenüberliegenden Druckraumseite D eine Druckplatte 17.1 beziehungsweise 17.2 auf. Beide Druckplatten 17 liegen dicht an Konturring und Rotor 51 an und sollen damit eine Leckage von Hydrauliköl aus den Druckbereichen verhindern.The vane pump according to Figure 3a has both on the outlet or delivery side F of the rotor as also on the opposite pressure chamber side D a pressure plate 17.1 or 17.2. Both pressure plates 17 lie close to the contour ring and rotor 51 and are said to have a leakage of Prevent hydraulic oil from the pressure areas.

Die Darstellung der förderseitigen Druckplatte 17.1 in Figur 3a läßt zwei Auslaßkanäle 53.1 und 53.2 erkennen, die jeweils eine Fluid-Verbindung zwischen einem Druckbereich und einem Förder- beziehungsweise Auslaßbereich 55 herstellen.The representation of the delivery-side pressure plate 17.1 in Figure 3a leaves two outlet channels 53.1 and 53.2 recognize each having a fluid connection between a pressure area and a conveyor respectively Create outlet area 55.

Auf der gegenüberliegenden Seite liegt die druckraumseitige Druckplatte 17.2 am Rotor 51 an. Sie weist ebenfalls einen Kanal 59 auf, der eine Fluid-Verbindung zwischen einem -in der Figur unteren-Druckbereich UD und einem Druckraum 61 herstellt. Dieser Druckraum 61 wird einerseits durch die druckraumseitige Druckplatte 17.2 und andererseits durch das Gehäuse gebildet.The pressure chamber side is on the opposite side Pressure plate 17.2 on the rotor 51. she also has a channel 59, which is a fluid connection between a pressure range lower in the figure UD and a pressure chamber 61 produces. This pressure chamber 61 is on the one hand by the pressure plate side pressure plate 17.2 and on the other hand formed by the housing.

In der druckraumseitigen Druckplatte 17.2 sind darüber hinaus weitere Öffnungen 63a, 63b vorgesehen, die in den jeweiligen Unterflügelbereich der Flügel münden. Damit entsteht eine Fluid-Verbindung zwischen dem unteren Druckbereich und mindestens einem Unterflügelbereich.In the pressure chamber side pressure plate 17.2 are above further openings 63a, 63b are provided, in the respective lower wing area of the wing lead. This creates a fluid connection between the lower pressure range and at least one Under the wing area.

Deutlich zu erkennen ist in Figur 3a, daß die druckraumseitige Druckplatte 17.2 keinen einem in der Figur oberen Druckbereich OD zugeordneten Kanal aufweist. Damit steht dieser obere Druckbereich nicht mit dem Druckraum 61 in Verbindung. Ein Kurzschluß in der Anlaufphase zwischen oberem Druckbereich, in dem der Kurzschluß herrscht, und unterem Druckbereich wird auf diese Weise verhindert. Hierbei wird vorausgesetzt, daß entsprechende Maßnahmen zur Verhinderung eines Kurzschlusses auch auf der Förderseite getroffen werden. So verhindern beispielsweise als Stege oder Platten ausgebildete hydraulische Widerstände auf der Förderseite, daß in der Kaltstartphase Fluid vom unteren Druckbereich in den oberen Druckbereich beziehungsweise den Auslaßbereich strömt.It can be clearly seen in FIG. 3a that the pressure plate side pressure plate 17.2 none one in channel assigned to the figure upper pressure range OD having. This is the upper pressure range not in connection with the pressure chamber 61. A short circuit in the start-up phase between the upper pressure range, in which the short circuit prevails, and lower Print area is prevented in this way. in this connection it is assumed that appropriate measures to prevent a short circuit also on the Funding side are taken. For example, prevent trained as webs or plates hydraulic resistors on the delivery side that in the cold start phase fluid from the lower pressure range in the upper pressure range respectively flows the outlet area.

Die in Figur 3b gezeigte Ausführungsform unterscheidet sich von der zuvor beschriebenen lediglich darin, daß die in den Unterflügelbereich mündende Öffnung 63 nicht in der druckraumseitigen Druckplatte 17.2 sondern in der förderseitigen Druckplatte 17.1 vorgesehen ist. Darüber hinaus ist der Kanal 59 der Druckplatte 17.2 nicht dem unteren Druckbereich sondern dem oberen Druckbereich zugeordnet. Eine Änderung der Wirkungsweise der beiden Druckplatten ergibt sich nach der Anlaufphase dadurch jedoch nicht.The embodiment shown in Figure 3b differs different from the one just described in that the opening into the lower wing area Opening 63 not in the pressure plate on the pressure chamber side 17.2 but in the delivery pressure plate 17.1 is provided. In addition, the Channel 59 of the pressure plate 17.2 not the lower one Print area but assigned to the upper print area. A change in the way the two work This results in pressure plates after the start-up phase However not.

Eine dritte Ausführungsform ist in Figur 3c zu sehen, wobei diese im wesentlichen mit der in Figur 3a dargestellten Ausführungsform übereinstimmt.A third embodiment can be seen in FIG. 3c, which essentially corresponds to that in FIG 3a embodiment corresponds.

Sie unterscheidet sich jedoch darin, daß in der druckraumseitigen Druckplatte 17.2 ein kleiner, im wesentlichen einer Entlüftung dienender Kanal 65 vorgesehen ist, der eine Verbindung zwischen dem Druckraum 61 und dem oberen Druckbereich schafft. Der Querschnitt des Kanals 65 wird dabei so dimensioniert, daß dessen hydraulischer Widerstand insbesondere für kaltes Hydrauliköl mit hoher Viskosität sehr groß ist. Der Widerstand sollte auf jeden Fall so groß sein, daß in der Kaltstartphase ein Ölstrom vom unteren Druckbereich über den Druckraum 61 und den Kanal 65 in den oberen Druckbereich, wo der Kurzschluß herrscht, und dann in den Ansaugbereich nahezu unterbunden wird.However, it differs in that in the pressure plate side pressure plate 17.2 a small, in essential ventilation channel 65 is provided, the connection between the Pressure chamber 61 and the upper pressure area creates. The cross section of the channel 65 is dimensioned so that that its hydraulic resistance in particular for cold hydraulic oil with high viscosity is very large. Resistance should be on everyone Case be so large that in the cold start phase Oil flow from the lower pressure range over the pressure chamber 61 and the channel 65 in the upper pressure range, where the short circuit prevails, and then into the suction area is almost prevented.

Die Funktion dieses Entlüftungskanals 65 besteht darin, sich im oberen Bereich des Druckraums 61 ansammelnde Luft entweichen zu lassen. Daher ist dieser Entlüftungskanal 65 dem obenliegenden Druckbereich zuzuordnen. Durch die damit erzielte Entlüftung des Druckraums 61 läßt sich eine Geräuschverminderung erzielen.The function of this ventilation channel 65 exists in accumulating in the upper area of the pressure chamber 61 To let air escape. Therefore this is Vent channel 65 the overhead pressure area assigned. Through the ventilation achieved with it the pressure chamber 61 can reduce noise achieve.

Figur 3d zeigt ein weiteres Ausführungsbeispiel, bei dem die druckraumseitige Druckplatte 17.2 zwei Kanäle 71 aufweist. Der obere Kanal 71.1 verbindet den oberen Druckbereich mit dem Druckraum 61, der untere Kanal 71.2 den unteren Druckbereich mit dem Druckraum 61. Die Querschnitte der beiden Kanäle 71 sind dabei so gewählt, daß die Summe der beiden einzelnen hydraulischen Widerstände für ein zähflüssiges, kaltes Öl so groß ist, daß sich nahezu kein ölstrom zwischen den beiden Druckbereichen durch den Druckraum 61 entwickelt.Figure 3d shows a further embodiment, in which the pressure plate side pressure plate 17.2 two Has channels 71. The upper channel 71.1 connects the upper pressure area with the pressure chamber 61, the lower channel 71.2 the lower pressure range with the Pressure chamber 61. The cross sections of the two channels 71 are chosen so that the sum of the two individual hydraulic resistors for a viscous, cold oil is so big that almost no oil flow between the two pressure ranges developed by the pressure chamber 61.

Damit wird diese Pumpe bezüglich der Entlüftungsfunktion lageunabhängig, da sich jeweils im oberen Bereich des Druckraums unabhängig von der Einbaulage ein Entlüftungskanal befindet, durch den die sich ansammelnde Luft entweichen kann.So this pump is related to the venting function regardless of location, since each is in the upper Area of the pressure chamber regardless of the installation position there is a ventilation duct through which the accumulating air can escape.

In den Figuren 3e und 3f sind zwei weitere Ausführungsbeispiele gezeigt, wie druckraumseitig ein hydraulischer Widerstand realisierbar ist, der beispielsweise statt der kleinen Querschnitte gemäß Figur 3d, eingesetzt werden kann. So läßt sich einerseits ein Steg 77 am Gehäuse vorsehen, der den Ölstrom in der Kaltstartphase zwischen unterem und oberem Druckbereich begrenzt. Neben der Anordnung des Stegs 77 am Gehäuse ist dieser natürlich auch an der Druckplatte 17.2 ausbildbar, wie in Figur 3f gezeigt. Selbstverständlich sind auch andere Ausgestaltungen eines hydraulischen Widerstands denkbar.FIGS. 3e and 3f show two further exemplary embodiments shown how a pressure room side hydraulic resistance can be realized, for example instead of according to the small cross sections Figure 3d, can be used. So you can on the one hand provide a web 77 on the housing, which Oil flow in the cold start phase between lower and limited upper pressure range. In addition to the arrangement of the web 77 on the housing is of course also can be formed on the pressure plate 17.2, as in FIG. 3f shown. Other configurations are of course also possible hydraulic resistance is conceivable.

Claims (9)

  1. A vane pump with a rotor receiving vanes, with two pressure plates (17) bearing closely on the rotor, whereof one is arranged on the feed side of the vane pump and one is arranged on the opposite side, and with a contoured ring surrounding the vanes, forming two suction and pressure regions, wherein at least one of the two pressure plates is provided with inlet and outlet openings (53), which create a fluid connection between a pressure region and a sub-vane region, characterized in that the pressure plate (17.2) opposite the feed side has an opening, which creates a fluid connection between one pressure region and a pressure chamber (61) bounded by this pressure plate (17.2), and seals the pressure chamber (61) relative to the other pressure region.
  2. A vane pump according to claim 1, characterized in that the fluid connection in the pressure plate (17.2) opposite the feed side has a passage area which is smaller than 1/3 of the passage area of the outlet opening of the opposite pressure plate (17.1).
  3. A vane pump according to claim 1 or 2, characterized in that the pressure plate (17.2) opposite the feed side has a vent channel - lying at the top in the installed position - which connects the pressure chamber (61) to the other pressure region and is so designed that it has a large hydraulic resistance to a cold fluid with high viscosity.
  4. A vane pump according to claim 1, 2 or 3, characterized in that openings (59, 63) are provided in the pressure plate (17.2) opposite the feed side, which create at the same time the fluid connection between one pressure region and at least one sub-vane region and a fluid connection into the pressure chamber (61).
  5. A vane pump according to claim 1, 2 or 3, characterized in that openings are provided in the pressure plate (17.1) on the feed side which create the fluid connection between pressure region and at least one sub-vane region, and in that the pressure plate (17.2) opposite the feed side seals the pressure chamber (61) relative to the sub-vane region.
  6. A vane pump according to claim 4 or 5, characterized in that an upper pressure region - in relation to the installed state - is in fluid connection with the pressure chamber (61).
  7. A vane pump according to claim 4 or 5, characterized in that a lower pressure region - in relation to the installed state - is in fluid connection with the pressure chamber (61).
  8. A vane pump according to claim 1, 2 or 3, characterized in that both pressure regions are in fluid connection with the pressure chamber (61), wherein the connections in the pressure plate (17.2) opposite the feed side are so dimensioned that the sum of the two hydraulic resistances is so large for a cold fluid that fluid flow is prevented.
  9. A vane pump according to claim 8, characterized in that a web (77) is provided in the housing and/or in the pressure plate on the side of the pressure plate (17.2) opposite the feed side and forms a large hydraulic resistance for preventing a short-circuit between the two pressure regions.
EP97929260A 1996-06-21 1997-06-23 Vane pump Expired - Lifetime EP0906512B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE29610896U 1996-06-21
DE29610896 1996-06-21
DE29612578U DE29612578U1 (en) 1996-06-21 1996-07-20 Vane pump
DE29612578U 1996-07-20
PCT/EP1997/003277 WO1997049915A1 (en) 1996-06-21 1997-06-23 Vane pump

Publications (2)

Publication Number Publication Date
EP0906512A1 EP0906512A1 (en) 1999-04-07
EP0906512B1 true EP0906512B1 (en) 2002-10-23

Family

ID=26059109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97929260A Expired - Lifetime EP0906512B1 (en) 1996-06-21 1997-06-23 Vane pump

Country Status (5)

Country Link
US (1) US6152716A (en)
EP (1) EP0906512B1 (en)
JP (1) JP4206132B2 (en)
DE (1) DE19780598D2 (en)
WO (1) WO1997049915A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010136015A2 (en) 2009-05-27 2010-12-02 Ixetic Bad Homburg Gmbh Pump, particular vane-type pump

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10027811A1 (en) * 2000-06-05 2001-12-13 Luk Fahrzeug Hydraulik Cellular pump with housing and pressure plates uses distance piece between pressure plate and chamber ring surfaces plus seal round between pressure-side plate and housing.
GB2383611B (en) * 2001-10-15 2005-04-06 Luk Automobiltech Gmbh & Co Kg Rotary vane-type machine
ES2440771T3 (en) * 2004-12-18 2014-01-30 Ixetic Bad Homburg Gmbh Bomb
US7361001B2 (en) * 2005-01-11 2008-04-22 General Motors Corporation Hydraulic vane pump
CA2679776A1 (en) * 2008-10-08 2010-04-08 Magna Powertrain Inc. Direct control variable displacement vane pump
WO2010051640A1 (en) * 2008-11-07 2010-05-14 Stt Technologies Inc., A Joint Venture Of Magna Powertrain Inc. And Shw Gmbh Fully submerged integrated electric oil pump
US8696326B2 (en) * 2009-05-14 2014-04-15 Magna Powertrain Inc. Integrated electrical auxiliary oil pump
JP5214644B2 (en) * 2010-02-09 2013-06-19 ジヤトコ株式会社 Air vent structure of oil pump for automatic transmission

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761206A (en) * 1971-02-02 1973-09-25 Shively Bros Inc Fluid device
US3787151A (en) * 1972-07-07 1974-01-22 Trw Inc Stack-up assembly
DE2735824C2 (en) * 1977-08-09 1986-01-23 Vickers Systems GmbH, 6380 Bad Homburg Vane pump, especially for steering assistance
DE2835816C2 (en) * 1978-08-16 1984-10-31 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Rotary lobe pump
JPS5928853A (en) * 1982-08-06 1984-02-15 Mitsubishi Electric Corp Rotary electric machine
US4505654A (en) * 1983-09-01 1985-03-19 Vickers Incorporated Rotary vane device with two pressure chambers for each vane
BR8607154A (en) * 1985-07-26 1988-04-19 Zahnradfabrik Friedrichshafen PUMP PUMPS
JPH01155096A (en) * 1987-12-10 1989-06-16 Suzuki Motor Co Ltd Vane type rotary compressor
US5147183A (en) * 1991-03-11 1992-09-15 Ford Motor Company Rotary vane pump having enhanced cold start priming
US5266018A (en) * 1992-07-27 1993-11-30 Vickers, Incorporated Hydraulic vane pump with enhanced axial pressure balance and flow characteristics
JPH09158868A (en) * 1995-12-08 1997-06-17 Zexel Corp Vane type compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010136015A2 (en) 2009-05-27 2010-12-02 Ixetic Bad Homburg Gmbh Pump, particular vane-type pump

Also Published As

Publication number Publication date
EP0906512A1 (en) 1999-04-07
DE19780598D2 (en) 1999-04-01
WO1997049915A1 (en) 1997-12-31
JP2000512709A (en) 2000-09-26
US6152716A (en) 2000-11-28
JP4206132B2 (en) 2009-01-07

Similar Documents

Publication Publication Date Title
EP0758716B1 (en) Vane pump
EP1019637B1 (en) Radial oscillating motor
EP0906512B1 (en) Vane pump
DE3803187C2 (en) Vane compressor with variable delivery rate
DE102014222321B3 (en) Vane pump with improved starting behavior
DE2324002B2 (en) Hydraulic vane pump
DE4011671C2 (en) Adjustable vane pump
EP1495227B1 (en) Hydraulic pump unit
DE1808826A1 (en) Rotary piston machine
EP2412979B1 (en) Pressure pump with suction nut
DE10040711C2 (en) Vane pump
DE102004021216B4 (en) High-pressure internal gear machine with multiple hydrostatic bearings per ring gear
DE19529806C2 (en) Vane pump
DE102019127388A1 (en) Fluid supply of under vane chambers of a vane pump
DE102020119893A1 (en) Rotary pump with adjustable delivery volume
EP4160019A1 (en) Rotary pump with an adjusting device
DE19742882C1 (en) Radial engine for motor vehicle
DE3601050A1 (en) WING CELL MOTOR
EP3728851B1 (en) Vane pump
WO1984000606A1 (en) Volumetric control device for fluids
DE19742881B4 (en) Radial swing motor
DE19629336C2 (en) Vane pump
AT517584B1 (en) VANE PUMP
DE102019121958A1 (en) Vane pump with pressure compensation connection
DE102012206520A1 (en) Vane machine has control element having bearing surfaces with axial inlet and outlet openings which are in fluid communication with radial inlet and outlet openings of cam portions through communicating passages

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990121

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20010406

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59708570

Country of ref document: DE

Date of ref document: 20021128

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030106

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030724

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20150618

Year of fee payment: 19

Ref country code: DE

Payment date: 20150619

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20150619

Year of fee payment: 19

Ref country code: IT

Payment date: 20150622

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59708570

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160623

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160630

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160623

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160623