EP1292769A1 - Pump - Google Patents

Pump

Info

Publication number
EP1292769A1
EP1292769A1 EP01940549A EP01940549A EP1292769A1 EP 1292769 A1 EP1292769 A1 EP 1292769A1 EP 01940549 A EP01940549 A EP 01940549A EP 01940549 A EP01940549 A EP 01940549A EP 1292769 A1 EP1292769 A1 EP 1292769A1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure plate
pump chamber
recess
ring
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.)
Granted
Application number
EP01940549A
Other languages
German (de)
French (fr)
Other versions
EP1292769B1 (en
Inventor
Wolfgang Reuter
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.)
ixetic Bad Homburg GmbH
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
Application filed by LuK Fahrzeug Hydraulik GmbH and Co KG filed Critical LuK Fahrzeug Hydraulik GmbH and Co KG
Publication of EP1292769A1 publication Critical patent/EP1292769A1/en
Application granted granted Critical
Publication of EP1292769B1 publication Critical patent/EP1292769B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter

Definitions

  • the invention relates to a pump with a housing which has a recess in which a pump unit is arranged, which has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring and a pump element which can be driven in rotation and which is arranged in the pump chamber , a housing cover closing the recess and fastened to the housing and with a pressure space delimited by the recess and the pressure plate.
  • Pumps of the type mentioned here are known. They have a housing in which a recess is formed. A pump unit is inserted into this recess.
  • This pump unit has a pump chamber which is formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring. Two printing plates can also be provided.
  • the pump unit further comprises a pump element which can be driven in rotation and is arranged in the pump chamber.
  • the recess in the housing is closed by a housing cover.
  • one of the pressure plates rests on the housing cover or is pushed by the housing cover onto the pump chamber ring.
  • the pump has a pressure chamber, that of the other pressure plate and the recess or directly from the wall the recess is limited.
  • the medium conveyed by the rotary driven pump element is in the pressure chamber under pressure.
  • This presses on the pressure plate which in turn transmits this force to the pump chamber ring, which thus acts on the other pressure plate radially on the outside with an axially acting force which deforms the pressure plate lying against the housing cover and the housing cover itself.
  • the pressure inside the pump element acts in such a way that the pressure plate and cover are curved outwards. This creates a leakage gap between the rotary-driven pump element and the cover-side pressure plate, which has an adverse effect on the volumetric efficiency of the pump.
  • Another known pump has attempted to solve this problem by making the pressure plate surface of the cover-side pressure plate facing the pump element convex.
  • the production of this curved printing plate surface requires a higher manufacturing effort.
  • a pump unit is arranged in the recess and has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring.
  • the pump unit also has a pump element which can be driven in rotation and is arranged in the pump chamber.
  • the pump further comprises a housing cover closing the recess and a pressure chamber which is delimited at least in regions by the recess.
  • the pump is characterized in that the housing cover and the cover-side pressure plate are formed in one piece and that between the housing cover and this pressure plate there is at least one pocket which is at least partially circumferential and which is open towards the edge of the pressure plate or an at least partially circumferential cavity.
  • the axial pressure forces acting on the cover-side pressure plate from the pressure plate via the pump chamber ring act on a larger diameter than the opposing forces acting on the pressure plate from the cover and are transmitted via the cover to the pressure plate formed integrally with it ,
  • the pressure plate formed on the cover bends in the direction of the pump unit, thereby reducing the leakage gap.
  • the depth of the pocket or cavity is approximately the same as the thickness of the pump chamber ring.
  • the contact surface or edge or the lever arm of the pump chamber ring acts in the pocket or cavity area for the force transmission between the pump chamber ring and the pressure plate on the housing cover, so that the deflection of the pressure plate is correspondingly large. It is clear from this that the deflection of the pressure plate can be influenced by the depth of the pocket / the cavity.
  • the pocket or cavity side walls are approximately parallel to the pressure plate ring surface of the pressure plate facing the pump chamber ring. Such a bag is easy to manufacture.
  • the depth of the pocket or cavity is constant. In another exemplary embodiment, the depth of the pocket or of the cavity can vary in the circumferential direction, as a result of which it is possible to adapt or influence the deflection as a function of the number of pressure ranges of the pump unit.
  • the pressure plate circular surface facing the pump element of the pressure plate formed in one piece with the housing cover is flat. Flat surfaces are particularly easy to manufacture.
  • the pressure plate ring area and the pressure plate circle area lie in one plane.
  • the entire pressure plate surface facing the pump unit is made flat, so that the production of the housing cover with the one-piece pressure plate can be carried out particularly inexpensively.
  • FIG. 1 shows a cross section through a pump, shown in a highly simplified manner, with a housing cover according to a first exemplary embodiment
  • FIGS. 2 shows a housing cover of the pump according to FIGS.
  • FIG. 3 shows a cross section through a pump with a very simplified representation
  • Housing cover according to a second embodiment.
  • the housing cover according to the invention described below with the pressure plate can be used for vane cell, blocking vane and roller cell pumps in which the pump element which can be driven in rotation is formed by a rotor, in which, depending on the type of pump, vanes or rollers are used or as a contour element is realized.
  • a gear pump it would also be conceivable to cover with a gear pump.
  • Such pumps or their function are known per se, so that the precise configuration of the pump element which can be driven in rotation is not described in more detail below.
  • FIG. 1 shows, in a highly simplified manner, a pump 1 in cross section, which comprises a housing 2.
  • a recess 3 is formed in the housing 2 and is closed by a housing cover 4.
  • the housing cover 4 is firmly connected to the housing 2 via fastening means 5, for example screws.
  • a pump unit 6 which has a pump chamber 7, which consists of a pump chamber ring 8 and two pressure plates 11 and 10 resting on its ring surfaces 9 and 10
  • the pump chamber 7 can also be closed on one side by the base 13 of the recess 3.
  • One of the pressure plates 11 is adjacent to the bottom
  • a pressure chamber 14 of the pump 1 lies between this pressure plate 11 and the base 13.
  • a medium delivered by a pump element 15 which can be driven in rotation is introduced into the pressure chamber 14, which has a connection to a pump-side consumer connection (not shown here).
  • the pump element 15 which can be driven in rotation is the above-mentioned rotor of a vane, barrier vane or roller cell pump or a gearwheel Gear pump.
  • This pump element 15 is driven in rotation by a drive shaft, not shown here, which is mounted in the housing 2.
  • a so-called leakage gap 16 is formed between the pump element 15 arranged in the pump chamber 7 and the cover-side pressure plate 12 facing away from the pressure chamber 14.
  • the housing cover 4 and the pressure plate 12 are formed in one piece, the diameter of the housing cover 4 being larger than that of the pressure plate 12. With its radially outer edge region 17, the housing cover 4 lies on the edge of the housing. Openings 18 are formed in this edge area 17, through which the fastening means 5 engage.
  • a circumferential pocket 19, which is designed to be open toward the pressure plate edge 20, is introduced into the one-piece component comprising the housing cover 4 and the pressure plate 12.
  • the pocket side walls 21 and 22 run essentially parallel to a pressure plate ring surface 23 of the pressure plate 12 facing the pump chamber ring 8.
  • the pressure plate ring surface 23 lies on the ring surface 10 of the pump chamber ring.
  • the depth T of the circumferential pocket 19 is somewhat greater than the thickness S of the pump chamber ring 8.
  • the depth T of the pocket is constant in the exemplary embodiment shown. However, it becomes clear that the depth T of the pocket can also vary in the circumferential direction or circumferential direction, in particular if the pump has more than one pressure range, as is the case with the above-mentioned pumps. penart is often the case or if the pump chamber ring 8 is not completely circular.
  • at least two suction and two pressure areas can be formed. The pressure area (s) are in fluid communication with the pressure chamber 14, so that the pressure of the conveyed medium is applied to it.
  • FIG. 1 also shows that the pressure plate circular surface 26 of the cover-side pressure plate 12 facing the rotary-driven pump element 15 is essentially flat. It is therefore clear that both the pressure plate ring surface 23 and the pressure plate circular surface 26 lie in one plane, that is to say are essentially planar. “Essentially” means that so-called pressure and suction recesses can be present in the pressure plate circular surface 26, which can also be formed on the pressure plate 11 on the surface facing the pump element 15.
  • a more or less thick spacer 27 is formed between the housing cover 4 and the pressure plate 12, the cross section of which is smaller than that of the housing cover 4 and the pressure plate 12.
  • a transmission of a supporting force (double arrows 28) from the housing cover 4 via the spacer or intermediate piece 27 to the pressure plate 12 is only possible in a force transmission area K which is opposite the opening 29 of the pump chamber ring 8.
  • the pressure chamber 14 is pressurized with the pressure of the medium conveyed. Forces thus act on the pressure plate 11, which would force this pressure plate 11 away from the base 13 of the recess 3.
  • These forces (arrow 31) are transmitted from the pressure plate 11 via an essentially circular ring surface 30 to the ring surface 9 on the pump chamber ring 8.
  • the pump chamber ring 8 in turn transmits these forces (arrows 31) to the pressure plate ring surface 23 on the pressure plate 12 via its ring surface 10.
  • the contact surface between the ring 8 and the pressure plate 11 or 12 is not necessarily circular. It can also be elliptical. In addition, there may be recesses between the pressure plate 11 or 12 and the ring 8 in the area of their contact surfaces, which can form the suction connection, for example.
  • These forces 31 act over a larger diameter range than the forces 28 in the supporting force transmission range K from the housing cover 4 to the pressure plate 12.
  • FIG. 2 the deformation of the housing cover 4 and the pressure plate 12 resulting from the forces 31 and 28 and the forces from the pump chamber 7 is shown in a greatly exaggerated manner. It is clear that the pressure plate 12 forms a curvature on its pressure plate circular surface 26, the belly of which protrudes into the leakage gap 16, so that the gap width of the leakage gap 16 is reduced, which increases the volumetric efficiency of the pump 1.
  • the housing cover 4 which is also referred to as a buckling or rocking cover, and the pressure plate 12 formed in one piece with the housing cover 4, a single component with two different bending shapes is thus realized, the two bending shapes being in opposite directions, i.e. the formation of a belly takes place in opposite directions.
  • these two bending forms are brought about by means of a single force component, namely the force 31, against the holding forces of the fastening means 5.
  • FIG. 3 shows a further exemplary embodiment of a housing cover 4 with a pressure plate 12 formed thereon in one piece.
  • the same or equivalent parts as in FIGS. 1 and 2 are provided with the same reference symbols in FIG. 3.
  • a cavity 19 ' is formed which, unlike the pocket 19, is designed with an open edge.
  • Such a cavity 19 ' can be produced, for example, by a so-called lost core if the one-piece component is cast from the housing cover 4 and the pressure plate 12 or, if appropriate, also sintered.
  • the depth T of the cavity 19 'or its width B is variable in order to be able to influence the deflection.
  • the cavity 19 ′ in the pressure plate 12 more or less to be arranged at a distance from the surface 10 of the pump chamber ring 8.
  • the pressure plate 12 can protrude beyond the outer circumferential surface of the ring 8. It is expressly pointed out that the configurations or arrangements mentioned above in connection with the pocket 19 also apply to the cavity 19 '.
  • this one-piece component comprising the housing cover 4 and the pressure plate 12 provides a very simple and inexpensive measure for reducing the leakage gap 16.
  • the housing cover 4 and the pressure plate 12 therefore do not have to be made particularly thick or rigid. Rather, the invention makes use of a predeterminable elastic material bend on the cover 4 and the pressure plate.
  • the pump 1 is thus characterized by an improved volumetric efficiency.

Landscapes

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

Abstract

The invention relates to a pump, comprising a housing with a recess in which a pump unit is located. Said pump unit has a pump chamber which is formed by a pump chamber ring and at least one pressure plate positioned on said pump chamber ring; and a rotary-driven pump element which is located in the pump chamber. The inventive pump also comprises a housing cover which is fixed to the housing and seals the recess; and a pressure space which is limited by the recess and the pressure plate. The invention is characterised in that the housing cover and the pressure plate are configured as a single piece and in that at least one at least partially peripheral pocket which opens towards the edge of the pressure plate or an at least partially peripheral cavity is configured between the housing cover and the pressure plate.

Description

Pumpepump
Beschreibungdescription
Die Erfindung betrifft eine Pumpe mit einem Gehäuse, das eine Ausnehmung aufweist, in der eine Pumpeneinheit angeordnet ist, die eine von einem Pumpenkammerring und zumindest einer auf dem Pumpen- kammerring liegenden Druckplatte gebildete Pumpenkammer und ein drehantreibbares Pumpenelement besitzt, das in der Pumpenkammer angeordnet ist, einem die Ausnehmung verschließenden, am Gehäuse befestigten Gehäusedeckel und mit einem von der Aus- nehmung und der Druckplatte begrenzten Druckraum.The invention relates to a pump with a housing which has a recess in which a pump unit is arranged, which has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring and a pump element which can be driven in rotation and which is arranged in the pump chamber , a housing cover closing the recess and fastened to the housing and with a pressure space delimited by the recess and the pressure plate.
Pumpen der hier angesprochenen Art sind bekannt. Sie weisen ein Gehäuse auf, in dem eine Ausnehmung ausgebildet ist. In diese Ausnehmung wird eine Pumpeneinheit eingesetzt. Diese Pumpeneinheit besitzt eine Pumpenkammer, die von einem Pumpenkammerring und zumindest einer auf dem Pumpenkammerring liegenden Druckplatte gebildet wird. Es können auch zwei Druckplatten vorgesehen sein. Die Pumpeneinheit umfasst ferner ein drehantreibbares Pumpenele- ent, das in der Pumpenkammer angeordnet ist. Die Ausnehmung in dem Gehäuse wird von einem Gehäusedeckel verschlossen. Bei den bekannten Pumpen liegt eine der Druckplatten an dem Gehäusedeckel an beziehungsweise wird von dem Gehäusedeckel an den Pumpenkammerring gedrängt. Außerdem besitzt die Pumpe einen Druckraum, der von der anderen Druckplatte und der Ausnehmung oder direkt von der Wand der Ausnehmung begrenzt wird. Im Betrieb der Pumpe befindet sich in dem Druckraum unter Druck das von dem drehangetriebenen Pumpenelement geförderte Medium. Dieses drückt auf die Druckplatte, die diese Kraft wiederum an den Pumpenkammerring überträgt, der somit die andere Druckplatte radial außen mit einer axial wirkenden Kraft beaufschlagt, die die am Gehäusedeckel anliegende Druckplatte und den Gehäusedeckel selbst verformt. Außerdem wirkt der Druck innerhalb des Pumpenelements derart, dass Druckplatte und Deckel nach außen gewölbt werden. Dabei entsteht zwischen dem drehangetriebenen Pumpenelement und der deckelseitigen Druckplatte ein Leckagespalt, der sich ungünstig auf den volumetri- sehen Wirkungsgrad der Pumpe auswirkt.Pumps of the type mentioned here are known. They have a housing in which a recess is formed. A pump unit is inserted into this recess. This pump unit has a pump chamber which is formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring. Two printing plates can also be provided. The pump unit further comprises a pump element which can be driven in rotation and is arranged in the pump chamber. The recess in the housing is closed by a housing cover. In the known pumps, one of the pressure plates rests on the housing cover or is pushed by the housing cover onto the pump chamber ring. In addition, the pump has a pressure chamber, that of the other pressure plate and the recess or directly from the wall the recess is limited. When the pump is operating, the medium conveyed by the rotary driven pump element is in the pressure chamber under pressure. This presses on the pressure plate, which in turn transmits this force to the pump chamber ring, which thus acts on the other pressure plate radially on the outside with an axially acting force which deforms the pressure plate lying against the housing cover and the housing cover itself. In addition, the pressure inside the pump element acts in such a way that the pressure plate and cover are curved outwards. This creates a leakage gap between the rotary-driven pump element and the cover-side pressure plate, which has an adverse effect on the volumetric efficiency of the pump.
Im Stand der Technik hat man versucht, dieses Problem dadurch zu lösen, dass der Gehäusedeckel sehr steif ausgebildet wird, um eine Verformung dieses Gehäusedeckels weitestgehend zu verhindern. Dazu wurde der Gehäusedeckel besonders dick ausgebildet. Dadurch erhöht sich die Baugröße der Pumpe und außerdem ihr Gewicht.In the prior art, attempts have been made to solve this problem by making the housing cover very rigid in order to largely prevent deformation of this housing cover. For this purpose, the housing cover was made particularly thick. This increases the size of the pump and also its weight.
Bei einer anderen bekannten Pumpe hat man versucht, dieses Problem dadurch zu lösen, dass die dem Pu - penelement zugewandte Druckplattenfläche der deckelseitigen Druckplatte konvex ausgebildet wird. Die Herstellung dieser gewölbten Druckplattenfläche erfordert jedoch einen höheren Fertigungsaufwand.Another known pump has attempted to solve this problem by making the pressure plate surface of the cover-side pressure plate facing the pump element convex. The production of this curved printing plate surface, however, requires a higher manufacturing effort.
Es ist daher Aufgabe der Erfindung, eine Pumpe an- zugeben, die einfach herstellbar ist und sich den- noch durch einen guten volumetrischen Wirkungsgrad auszeichnet.It is therefore an object of the invention to provide a pump which is simple to manufacture and which is still characterized by a good volumetric efficiency.
Gelöst wird diese Aufgabe mit einer Pumpe, die ein Gehäuse u fasst, in dem eine Ausnehmung ausgebildet ist. In der Ausnehmung ist eine Pumpeneinheit angeordnet, die eine von einem Pumpenkammerring und zumindest einer auf dem Pumpenkammerring liegenden Druckplatte gebildete Pumpenkammer besitzt. Ferner besitzt die Pumpeneinheit ein drehantreibbares Pu - penelement, das in der Pumpenkammer angeordnet ist. Die Pumpe umfasst ferner einen die Ausnehmung verschließenden Gehäusedeckel und einen Druckraum, der zumindest bereichsweise von der Ausnehmung begrenzt wird. Erfindungsgemäß zeichnet sich die Pumpe da- durch aus, dass der Gehäusedeckel und die deckel- seitige Druckplatte einstückig ausgebildet sind und dass zwischen Gehäusedeckel und dieser Druckplatte zumindest eine zumindest bereichsweise umlaufende zum Druckplattenrand hin offene Tasche oder ein zu- mindest bereichsweise umlaufender Hohlraum ausgebildet ist. Im Betrieb der erfindungsgemäßen Pumpe greifen die von der Druckplatte über den Pumpenkammerring auf die deckelseitige Druckplatte wirkenden axialen Druckkräfte auf einem größeren Durchmesser an als die entgegengesetzt wirkenden vom Deckel auf die Druckplatte angreifenden Kräfte, die über den Deckel an die einstückig mit ihm ausgebildete Druckplatte übertragen werden. Dadurch biegt sich die am Deckel ausgebildete Druckplatte in Richtung der Pumpeneinheit durch und verringert dadurch den Leckagespalt. Bei einem bevorzugten Ausführungsbeispiel ist die Tiefe der Tasche oder des Hohlraums etwa genau so groß wie die Stärke des Pumpenkammerringes. Dadurch wirkt für die Kraftübertragung zwischen Pumpenkam- merring und der gehäusedeckelseitigen Druckplatte die Berührfläche oder -kante beziehungsweise der Hebelarm des Pumpenkammerringes im Taschen- oder Hohlraumbereich, so dass die Durchbiegung der Druckplatte entsprechend groß ist. Daraus wird klar, dass durch die Tiefe der Tasche/des Hohlraums die Durchbiegung der Druckplatte beeinflusst werden kann.This problem is solved with a pump that holds a housing u in which a recess is formed. A pump unit is arranged in the recess and has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring. The pump unit also has a pump element which can be driven in rotation and is arranged in the pump chamber. The pump further comprises a housing cover closing the recess and a pressure chamber which is delimited at least in regions by the recess. According to the invention, the pump is characterized in that the housing cover and the cover-side pressure plate are formed in one piece and that between the housing cover and this pressure plate there is at least one pocket which is at least partially circumferential and which is open towards the edge of the pressure plate or an at least partially circumferential cavity. In the operation of the pump according to the invention, the axial pressure forces acting on the cover-side pressure plate from the pressure plate via the pump chamber ring act on a larger diameter than the opposing forces acting on the pressure plate from the cover and are transmitted via the cover to the pressure plate formed integrally with it , As a result, the pressure plate formed on the cover bends in the direction of the pump unit, thereby reducing the leakage gap. In a preferred embodiment, the depth of the pocket or cavity is approximately the same as the thickness of the pump chamber ring. As a result, the contact surface or edge or the lever arm of the pump chamber ring acts in the pocket or cavity area for the force transmission between the pump chamber ring and the pressure plate on the housing cover, so that the deflection of the pressure plate is correspondingly large. It is clear from this that the deflection of the pressure plate can be influenced by the depth of the pocket / the cavity.
Bei einem bevorzugten Ausführungsbeispiel sind die Taschen- beziehungsweise Hohlraumseitenwandungen etwa parallel zu der dem Pumpenkammerring zugewandten Druckplattenringflache der Druckplatte ausgebildet. Eine derartige Tasche ist leicht herstellbar .In a preferred embodiment, the pocket or cavity side walls are approximately parallel to the pressure plate ring surface of the pressure plate facing the pump chamber ring. Such a bag is easy to manufacture.
Bei einem Ausführungsbeispiel ist die Tiefe der Ta- sehe beziehungsweise des Hohlraums konstant. Bei einem anderen Ausführungsbeispiel kann die Tiefe der Tasche beziehungsweise des Hohlraums in Um- fangsrichtung variieren, wodurch eine Anpassung beziehungsweise Beeinflussung der Durchbiegung in Ab- hängigkeit der Anzahl der Druckbereiche der Pumpeneinheit möglich ist.In one embodiment, the depth of the pocket or cavity is constant. In another exemplary embodiment, the depth of the pocket or of the cavity can vary in the circumferential direction, as a result of which it is possible to adapt or influence the deflection as a function of the number of pressure ranges of the pump unit.
Bei druckloser Pumpe ist die dem Pumpenelement zugewandte Druckplattenkreisfläche der mit dem Gehäusedeckel einstückig ausgebildeten Druckplatte eben ausgebildet. Ebene Flächen lassen sich in der Fertigung besonders leicht herstellen. Bei einer Ausführungsform ist vorgesehen, dass im Stillstand der Pumpe beziehungsweise bei druckloser Pumpe die Druckplattenringflache und die Druckplattenkreisfläche in einer Ebene liegen. Somit wird die gesamte der Pumpeneinheit zugewandte Druckplattenfläche eben ausgebildet, so dass die Herstellung des Gehäusedeckels mit der einstückigen Druckplatte besonders kostengünstig ausgeführt werden kann.When the pump is depressurized, the pressure plate circular surface facing the pump element of the pressure plate formed in one piece with the housing cover is flat. Flat surfaces are particularly easy to manufacture. In one embodiment it is provided that when the pump is at a standstill or when the pump is not under pressure, the pressure plate ring area and the pressure plate circle area lie in one plane. Thus, the entire pressure plate surface facing the pump unit is made flat, so that the production of the housing cover with the one-piece pressure plate can be carried out particularly inexpensively.
Die Erfindung wird nachfolgend anhand eines Ausfüh- rungsbeispiels mit Bezug auf die Zeichnung näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of an exemplary embodiment with reference to the drawing. Show it:
Figur 1 einen Querschnitt durch eine stark vereinfacht wiedergegebene Pumpe mit einem Gehäusedeckel nach einem ersten Ausfüh- rungsbeispiel,FIG. 1 shows a cross section through a pump, shown in a highly simplified manner, with a housing cover according to a first exemplary embodiment,
Figur 2 einen einstückig mit einer Druckplatte ausgebildeten Gehäusedeckel der Pumpe nach Figur 1 und2 shows a housing cover of the pump according to FIGS
Figur 3 einen Querschnitt durch eine stark ver- einfacht wiedergegebene Pumpe mit einemFIG. 3 shows a cross section through a pump with a very simplified representation
Gehäusedeckel nach einem zweiten Ausführungsbeispiel .Housing cover according to a second embodiment.
Der im Folgenden beschriebene erfindungsgemäße Gehäusedeckel mit der Druckplatte lässt sich für Flü- gelzellen-, Sperrflügel- und Rollenzellenpumpen verwenden, bei denen das drehantreibbare Pumpenelement durch einen Rotor gebildet wird, in dem -je nach Pumpenart- Flügel oder Rollen eingesetzt sind oder der als Konturelement realisiert ist. Denkbar wäre es jedoch auch, den erfindungsgemäßen Gehäuse- deckel bei einer Zahnradpumpe zu verwenden. Derartige Pumpen beziehungsweise deren Funktion sind an sich bekannt, so dass im Folgenden die genaue Ausgestaltung des drehantreibbaren Pumpenelements nicht näher beschrieben ist.The housing cover according to the invention described below with the pressure plate can be used for vane cell, blocking vane and roller cell pumps in which the pump element which can be driven in rotation is formed by a rotor, in which, depending on the type of pump, vanes or rollers are used or as a contour element is realized. However, it would also be conceivable to cover with a gear pump. Such pumps or their function are known per se, so that the precise configuration of the pump element which can be driven in rotation is not described in more detail below.
Figur 1 zeigt stark vereinfacht eine Pumpe 1 im Querschnitt, die ein Gehäuse 2 umfasst. In dem Gehäuse 2 ist eine Ausnehmung 3 ausgebildet, die von einem Gehäusedeckel 4 verschlossen wird. Der Gehäu- sedeckel 4 ist über Befestigungsmittel 5, beispielsweise Schrauben, fest mit dem Gehäuse 2 verbunden.FIG. 1 shows, in a highly simplified manner, a pump 1 in cross section, which comprises a housing 2. A recess 3 is formed in the housing 2 and is closed by a housing cover 4. The housing cover 4 is firmly connected to the housing 2 via fastening means 5, for example screws.
In der Ausnehmung 3 ist eine Pumpeneinheit 6 angeordnet, die eine Pumpenkammer 7 besitzt, die von einem Pumpenkammerring 8 und zwei auf dessen Ringflächen 9 und 10 aufliegenden Druckplatten 11 undIn the recess 3, a pump unit 6 is arranged, which has a pump chamber 7, which consists of a pump chamber ring 8 and two pressure plates 11 and 10 resting on its ring surfaces 9 and 10
12 gebildet wird. 'Anstelle der Druckplatte 11 kann die Pumpenkammer 7 an ihrer einen Seite auch vom Grund 13 der Ausnehmung 3 verschlossen werden. Eine der Druckplatten 11 liegt benachbart zu dem Grund12 is formed. Instead of the pressure plate 11, the pump chamber 7 can also be closed on one side by the base 13 of the recess 3. One of the pressure plates 11 is adjacent to the bottom
13 der Ausnehmung 3. Zwischen dieser Druckplatte 11 und dem Grund 13 liegt ein Druckraum 14 der Pumpe 1.13 of the recess 3. A pressure chamber 14 of the pump 1 lies between this pressure plate 11 and the base 13.
In den Druckraum 14, der eine Verbindung zu einem hier nicht dargestellten pumpenseitigen Verbrau- cheranschluss aufweist, wird ein von einem drehantreibbaren Pumpenelement 15 gefördertes Medium eingebracht. Bei dem drehantreibbaren Pumpenelement 15 handelt es sich um den vorstehend erwähnten Ro- tor einer Flügelzellen-, Sperrflügel- oder Rollenzellenpumpe beziehungsweise um ein Zahnrad einer Zahnradpumpe. Dieses Pumpenelement 15 ist über eine hier nicht dargestellte Antriebswelle, die im Gehäuse 2 gelagert ist, drehangetrieben. Zwischen dem in der Pumpenkammer 7 angeordneten Pumpenelement 15 und der dem Druckraum 14 abgewandten deckelseitigen Druckplatte 12 ist ein sogenannter Leckagespalt 16 ausgebildet, der bei der erfindungsgemäßen Pumpe jedoch im wesentlichen nur im Stillstand der Pumpe 1 vorliegt.A medium delivered by a pump element 15 which can be driven in rotation is introduced into the pressure chamber 14, which has a connection to a pump-side consumer connection (not shown here). The pump element 15 which can be driven in rotation is the above-mentioned rotor of a vane, barrier vane or roller cell pump or a gearwheel Gear pump. This pump element 15 is driven in rotation by a drive shaft, not shown here, which is mounted in the housing 2. A so-called leakage gap 16 is formed between the pump element 15 arranged in the pump chamber 7 and the cover-side pressure plate 12 facing away from the pressure chamber 14.
Der Gehäusedeckel 4 und die Druckplatte 12 sind einstückig ausgebildet, wobei der Durchmesser des Gehäusedeckels 4 größer ist als der der Druckplatte 12. Mit seinem radial außenliegenden Randbereich 17 liegt der Gehäusedeckel 4 auf dem Gehäuserand auf. In diesem Randbereich 17 sind Durchbrüche 18 ausgebildet, durch die die Befestigungsmittel 5 greifen. In das einstückige Bauteil aus Gehäusedeckel 4 und Druckplatte 12 ist eine umlaufende Tasche 19 eingebracht, die zum Druckplattenrand 20 hin offen aus- gebildet ist. Die Taschenseitenwandungen 21 und 22 verlaufen im wesentlichen parallel zu einer dem Pumpenkammerring 8 zugewandten Druckplattenringflache 23 der Druckplatte 12. Die Druckplattenringflache 23 liegt auf der Ringfläche 10 des Pumpenkam- merrings auf. Im Ausführungsbeispiel ist die Tiefe T der umlaufenden Tasche 19 etwas größer als die Stärke S des Pumpenkammerrings 8. Die Tiefe T der Tasche ist im gezeigten Ausführungsbeispiel konstant. Es wird jedoch klar, dass die Tiefe T der Tasche in Umlaufrichtung beziehungsweise ümfangs- richtung auch variieren kann, insbesondere dann, wenn die Pumpe mehr als einen Druckbereich aufweist, wie dies bei den vorstehend erwähnten Pum- penarten häufig der Fall ist oder wenn der Pumpenkammerring 8 nicht vollständig kreisförmig ist. Insbesondere bei Flügelzellen-, Sperrflügel- und Rollenzellenpumpen können zumindest zwei Saug- und zwei Druckbereiche ausgebildet sein. Der beziehungsweise die Druckbereiche stehen mit dem Druckraum 14 in Fluidverbindung, so dass dieser mit dem Druck des geförderten Mediums beaufschlagt ist.The housing cover 4 and the pressure plate 12 are formed in one piece, the diameter of the housing cover 4 being larger than that of the pressure plate 12. With its radially outer edge region 17, the housing cover 4 lies on the edge of the housing. Openings 18 are formed in this edge area 17, through which the fastening means 5 engage. A circumferential pocket 19, which is designed to be open toward the pressure plate edge 20, is introduced into the one-piece component comprising the housing cover 4 and the pressure plate 12. The pocket side walls 21 and 22 run essentially parallel to a pressure plate ring surface 23 of the pressure plate 12 facing the pump chamber ring 8. The pressure plate ring surface 23 lies on the ring surface 10 of the pump chamber ring. In the exemplary embodiment, the depth T of the circumferential pocket 19 is somewhat greater than the thickness S of the pump chamber ring 8. The depth T of the pocket is constant in the exemplary embodiment shown. However, it becomes clear that the depth T of the pocket can also vary in the circumferential direction or circumferential direction, in particular if the pump has more than one pressure range, as is the case with the above-mentioned pumps. penarten is often the case or if the pump chamber ring 8 is not completely circular. In particular in the case of vane, barrier vane and roller cell pumps, at least two suction and two pressure areas can be formed. The pressure area (s) are in fluid communication with the pressure chamber 14, so that the pressure of the conveyed medium is applied to it.
Figur 1 zeigt noch, dass die dem drehangetriebenen Pumpenelement 15 zugewandte Druckplattenkreisfläche 26 der deckelseitigen Druckplatte 12 im wesentlichen eben ausgebildet ist. Es wird also klar, dass sowohl die Druckplattenringflache 23 und die Druckplattenkreisfläche 26 in einer Ebene liegen, also im wesentlichen eben hergestellt sind. "Im wesentlichen" bedeutet, dass in der Druckplattenkreisfläche 26 unter anderem sogenannte Druck- und Saugaus- nehmungen vorhanden sein können, die im übrigen auch an der dem Pumpenelement 15 zugewandten Fläche an der Druckplatte 11 ausbildbar sind.FIG. 1 also shows that the pressure plate circular surface 26 of the cover-side pressure plate 12 facing the rotary-driven pump element 15 is essentially flat. It is therefore clear that both the pressure plate ring surface 23 and the pressure plate circular surface 26 lie in one plane, that is to say are essentially planar. “Essentially” means that so-called pressure and suction recesses can be present in the pressure plate circular surface 26, which can also be formed on the pressure plate 11 on the surface facing the pump element 15.
Je nach Breite B der Tasche 19 wird zwischen Gehäusedeckel 4 und Druckplatte 12 ein mehr oder weniger dickes Distanzstück 27 ausgebildet, dessen Querschnitt geringer als der des Gehäusedeckels 4 und der Druckplatte 12 ist. Somit ist eine Übertragung einer Stützkraft (Doppelpfeile 28) von dem Gehäusedeckel 4 über das Distanz- oder Zwischenstück 27 zu der Druckplatte 12 lediglich in einem Kraftübertragungsbereich K möglich, der dem Durchbruch 29 des Pumpenkam errings 8 gegenüber liegt. Im Betrieb der Pumpe ist der Druckraum 14 mit dem Druck des geförderten Mediums beaufschlagt. Somit wirken auf die Druckplatte 11 Kräfte, die diese Druckplatte 11 von dem Grund 13 der Ausnehmung 3 wegdrängen würden. Diese Kräfte (Pfeil 31) werden von der Druckplatte 11 über eine im wesentlichen kreisförmige Ringfläche 30 auf die Ringfläche 9 an dem Pumpenkammerring 8 übertragen. Der Pumpenkammerring 8 wiederum überträgt über seine Ringfläche 10 diese Kräfte (Pfeile 31) auf die Druckplattenringflache 23 an der Druckplatte 12. Es wird klar, dass die Berührfläche zwischen Ring 8 und Druckplatte 11 beziehungsweise 12 nicht zwingend kreisförmig sein uss. Sie kann auch ellipsenförmig sein. Außerdem können zwischen Druckplatte 11 beziehungsweise 12 und Ring 8 im Bereich ihrer Berührflächen Ausnehmungen vorliegen, die beispielsweise den Sauganschluss bilden können. Diese Kräfte 31 wirken auf einem größeren Durchmesserbereich als die Kräfte 28 im Stützkraftübertragungsbereich K von dem Gehäusedeckel 4 zur Druckplatte 12.Depending on the width B of the pocket 19, a more or less thick spacer 27 is formed between the housing cover 4 and the pressure plate 12, the cross section of which is smaller than that of the housing cover 4 and the pressure plate 12. A transmission of a supporting force (double arrows 28) from the housing cover 4 via the spacer or intermediate piece 27 to the pressure plate 12 is only possible in a force transmission area K which is opposite the opening 29 of the pump chamber ring 8. During operation of the pump, the pressure chamber 14 is pressurized with the pressure of the medium conveyed. Forces thus act on the pressure plate 11, which would force this pressure plate 11 away from the base 13 of the recess 3. These forces (arrow 31) are transmitted from the pressure plate 11 via an essentially circular ring surface 30 to the ring surface 9 on the pump chamber ring 8. The pump chamber ring 8 in turn transmits these forces (arrows 31) to the pressure plate ring surface 23 on the pressure plate 12 via its ring surface 10. It is clear that the contact surface between the ring 8 and the pressure plate 11 or 12 is not necessarily circular. It can also be elliptical. In addition, there may be recesses between the pressure plate 11 or 12 and the ring 8 in the area of their contact surfaces, which can form the suction connection, for example. These forces 31 act over a larger diameter range than the forces 28 in the supporting force transmission range K from the housing cover 4 to the pressure plate 12.
In Figur 2 ist die aus den Kräften 31 und 28 sowie den Kräften aus der Pumpenkammer 7 resultierende Verformung des Gehäusedeckels 4 und der Druckplatte 12 sehr stark übertrieben dargestellt. Es wird deutlich, dass die Druckplatte 12 an ihrer Druckplattenkreisfläche 26 eine Wölbung ausbildet, deren Bauch in den Leckagespalt 16 hineinragt, so dass die Spaltbreite des Leckagespalts 16 verringert wird, wodurch sich der volumetrische Wirkungsgrad der Pumpe 1 erhöht. Durch die von der DruckplatteIn FIG. 2, the deformation of the housing cover 4 and the pressure plate 12 resulting from the forces 31 and 28 and the forces from the pump chamber 7 is shown in a greatly exaggerated manner. It is clear that the pressure plate 12 forms a curvature on its pressure plate circular surface 26, the belly of which protrudes into the leakage gap 16, so that the gap width of the leakage gap 16 is reduced, which increases the volumetric efficiency of the pump 1. By the from the pressure plate
11 und dem Pumpenkammerring 8 auf die Druckplatte11 and the pump chamber ring 8 on the pressure plate
12 übertragenen Kräfte 31 wird der Deckel 4 nach außen gewölbt, da er lediglich in seinem Randbereich 17 mit den Befestigungsmitteln 5 am Gehäuse 2 befestigt ist.12 transmitted forces 31, the cover 4 after curved outside since it is only fastened to the housing 2 with the fastening means 5 in its edge region 17.
Mit dem auch als Beul- oder Wippdeckel bezeichneten Gehäusedeckel 4 und der mit dem Gehäusedeckel 4 einstückig ausgebildeten Druckplatte 12 wird also ein einziges Bauteil mit zwei unterschiedlichen Biegeformen realisiert, wobei die beiden Biegeformen gegenläufig sind, also die Ausbildung eines Bauches in entgegengesetzte Richtungen erfolgt. Diese beiden Biegeformen werden jedoch mittels einer einzigen Kraftkomponente, nämlich der Kraft 31, gegen die Haltekräfte der Befestigungsmittel 5 hervorgerufen.With the housing cover 4, which is also referred to as a buckling or rocking cover, and the pressure plate 12 formed in one piece with the housing cover 4, a single component with two different bending shapes is thus realized, the two bending shapes being in opposite directions, i.e. the formation of a belly takes place in opposite directions. However, these two bending forms are brought about by means of a single force component, namely the force 31, against the holding forces of the fastening means 5.
Figur 3 zeigt ein weiteres Ausführungsbeispiel eines Gehäusedeckels 4 mit einer daran einstückig ausgebildeten Druckplatte 12. Gleiche beziehungsweise gleich wirkende Teile wie in den Figuren 1 und 2 sind in Figur 3 mit denselben Bezugszeichen versehen. Bei diesem Gehäusedeckel 4 ist anstelle der Tasche 19 ein Hohlraum 19' ausgebildet, der -nicht wie die Tasche 19- randoffen ausgebildet ist. Ein derartiger Hohlraum 19' kann beispielsweise durch einen sogenannten verlorenen Kern herge- stellt werden, wenn das einstückige Bauteil aus Gehäusedeckel 4 und Druckplatte 12 gegossen oder gegebenenfalls auch gesintert wird. Selbstverständlich ist klar, dass die Tiefe T des Hohlraums 19' beziehungsweise seine Breite B variabel ist, um die Durchbiegung beeinflussen zu können. Denkbar ist es auch, wie im übrigen auch bei der Tasche 19, den Hohlraum 19' in der Druckplatte 12 mehr oder weni- ger beabstandet zu der Fläche 10 des Pumpenkammer- rings 8 anzuordnen. Außerdem kann -wie in Figur 3 dargestellt- die Druckplatte 12 die äußere Umfangs- flache des Ringes 8 überragen. Ausdrücklich wird noch darauf hingewiesen, dass die im Zusammenhang mit der Tasche 19 vorstehend erwähnten Ausgestaltungen beziehungsweise Anordnungen auch für den Hohlraum 19' gelten.FIG. 3 shows a further exemplary embodiment of a housing cover 4 with a pressure plate 12 formed thereon in one piece. The same or equivalent parts as in FIGS. 1 and 2 are provided with the same reference symbols in FIG. 3. In this housing cover 4, instead of the pocket 19, a cavity 19 'is formed which, unlike the pocket 19, is designed with an open edge. Such a cavity 19 'can be produced, for example, by a so-called lost core if the one-piece component is cast from the housing cover 4 and the pressure plate 12 or, if appropriate, also sintered. Of course, it is clear that the depth T of the cavity 19 'or its width B is variable in order to be able to influence the deflection. It is also conceivable, as is also the case with the pocket 19, the cavity 19 ′ in the pressure plate 12 more or less to be arranged at a distance from the surface 10 of the pump chamber ring 8. In addition, as shown in FIG. 3, the pressure plate 12 can protrude beyond the outer circumferential surface of the ring 8. It is expressly pointed out that the configurations or arrangements mentioned above in connection with the pocket 19 also apply to the cavity 19 '.
Es zeigt sich also, dass mit diesem einstückigen Bauteil aus Gehäusedeckel 4 und Druckplatte 12 eine sehr einfach und kostengünstig zu realisierende Maßnahme zur Verringerung des Leckagespalts 16 gegeben ist. Der Gehäusedeckel 4 und die Druckplatte 12 müssen also nicht besonders dick beziehungsweise steif ausgestaltet werden. Vielmehr macht sich die Erfindung eine vorgebbare elastische Materialbiegung an dem Deckel 4 und der Druckplatte zu Nutze. Die Pumpe 1 zeichnet sich somit durch einen verbesserten volumetrischen Wirkungsgrad aus.It can thus be seen that this one-piece component comprising the housing cover 4 and the pressure plate 12 provides a very simple and inexpensive measure for reducing the leakage gap 16. The housing cover 4 and the pressure plate 12 therefore do not have to be made particularly thick or rigid. Rather, the invention makes use of a predeterminable elastic material bend on the cover 4 and the pressure plate. The pump 1 is thus characterized by an improved volumetric efficiency.
Die mit der Anmeldung eingereichten Patentansprüche sind Formulierungsvorschläge ohne Präjudiz weitergehenden Patentschutzes. Die Anmelderin behält sich vor, noch weitere, bisher nur in der Beschreibung und/oder den Zeichnungen offenbarte Merkmalskombi- nationen zu beanspruchen.The patent claims submitted with the application are proposals for formulation without prejudice to further patent protection. The applicant reserves the right to claim further combinations of features previously only disclosed in the description and / or the drawings.
In Unteransprüchen verwendete Rückbeziehungen weisen auf die weitere Ausbildung des Gegenstandes des Hauptanspruchs durch die Merkmale des jeweiligen Unteranspruches hin; sie sind nicht als ein Ver- zieht auf die Erzielung eines selbständigen, gegen- ständlichen Schutzes für die Merkmalskombinationen der rückbezogenen Unteransprüche zu verstehen.Back-references used in sub-claims indicate the further development of the subject matter of the main claim through the features of the respective sub-claim; they are not considered to be delayed in achieving an independent, opposing understand protection for the combinations of features of the related subclaims.
Da die Gegenstände der Unteransprüche im Hinblick auf den Stand der Technik am Prioritätstag eigene und unabhängige Erfindungen bilden können, behält die Anmelderin sich vor, sie zum Gegenstand unabhängiger Ansprüche oder Teilungserklärungen zu machen. Sie können weiterhin auch selbständige Erfindungen enthalten, die eine von den Gegenständen der vorhergehenden Unteransprüche unabhängige Gestaltung aufweisen.Since the subjects of the subclaims can form their own and independent inventions with regard to the prior art on the priority date, the applicant reserves the right to make them the subject of independent claims or declarations of division. They can furthermore also contain independent inventions which have a design which is independent of the objects of the preceding subclaims.
Die Ausführungsbeispiele sind nicht als Einschränkung der Erfindung zu verstehen. Vielmehr sind im Rahmen der vorliegenden Offenbarung zahlreiche Ab- änderungen und Modifikationen möglich, insbesondere solche Varianten, Elemente und Kombinationen und/oder Materialien, die zum Beispiel durch Kombination oder Abwandlung von einzelnen, in Verbindung mit den in der allgemeinen Beschreibung und Ausfüh- rungsformen sowie den Ansprüchen beschriebenen und in den Zeichnungen enthaltenen Merkmalen beziehungsweise Elementen oder Verfahrensschritten für den Fachmann im Hinblick auf die Lösung der Aufgabe entnehmbar sind und durch kombinierbare Merkmale zu einem neuen Gegenstand oder zu neuen Verfahrensschritten beziehungsweise Verfahrensschrittfolgen führen, auch soweit sie Herstell-, Prüf- und Arbeitsverfahren betreffen. The exemplary embodiments are not to be understood as a restriction of the invention. Rather, numerous changes and modifications are possible within the scope of the present disclosure, in particular such variants, elements and combinations and / or materials, for example by combining or modifying individual ones, in conjunction with those in the general description and embodiments as well Features or elements or process steps described in the claims and contained in the drawings can be removed by the person skilled in the art with regard to the solution of the task and lead to a new object or to new process steps or process step sequences through combinable features, also insofar as they are manufacturing, testing and Concern working procedures.

Claims

Ansprüche Expectations
1. Pumpe mit einem Gehäuse, das eine Ausnehmung aufweist, in der eine Pumpeneinheit angeordnet ist, die eine von einem Pumpenkammerring und zumindest einer auf dem Pumpenkammerring liegenden Druckplatte gebildete Pumpenkammer und ein drehantreibbares Pumpenelement besitzt, das in der Pumpenkammer angeordnet ist, einem die Ausnehmung verschließenden, am Gehäuse befestigten Gehäusedeckel, und mit einem von der Ausnehmung und der Druckplatte begrenzten Druckraum, dadurch gekennzeichnet, dass der Gehäu- sedeckel und die Druckplatte einstückig ausgebildet sind und dass zwischen Gehäusedeckel und dieser Druckplatte zumindest eine zumindest bereichsweise umlaufende, zum Druckplattenrand hin offene Tasche oder ein zumindest bereichsweise umlaufender Hohl- räum ausgebildet ist.1. Pump with a housing which has a recess in which a pump unit is arranged, which has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring and a rotationally drivable pump element which is arranged in the pump chamber, the recess sealing housing cover, fastened to the housing, and with a pressure space delimited by the recess and the pressure plate, characterized in that the housing cover and the pressure plate are formed in one piece and that between the housing cover and this pressure plate at least one circumferential, at least regionally, open to the pressure plate edge Pocket or an at least partially surrounding cavity is formed.
2. Pumpe, insbesondere nach Anspruch 1, dadurch gekennzeichnet, dass die Tiefe der Tasche beziehungsweise des Hohlraums etwa der Stärke des Pumpenkam- merrings entspricht.2. Pump, in particular according to claim 1, characterized in that the depth of the pocket or the cavity corresponds approximately to the thickness of the pump chamber ring.
3. Pumpe, insbesondere nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Taschen- beziehungsweise Hohlraumseitenwandungen etwa parallel zu der dem Pumpenkammerring zugewandten Druckplattenring- flache der Druckplatte liegen. 3. Pump, in particular according to claim 1 or 2, characterized in that the pocket or cavity side walls are approximately parallel to the pressure plate ring face of the pressure plate facing the pump chamber ring.
4. Pumpe, insbesondere nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Tiefe der Tasche beziehungsweise des Hohlraums konstant ist.4. Pump, in particular according to one of the preceding claims, characterized in that the depth of the pocket or the cavity is constant.
5. Pumpe, insbesondere nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Tiefe der Tasche Beziehungsweise des Hohlraums in Umfangs- richtung variiert.5. Pump, in particular according to one of claims 1 to 3, characterized in that the depth of the pocket or the cavity varies in the circumferential direction.
6. Pumpe, insbesondere nach einem der vorhergehen- den Ansprüche, dadurch gekennzeichnet, dass im6. Pump, in particular according to one of the preceding claims, characterized in that in
Stillstand der Pumpe die dem Pumpenelement zugewandte Druckplattenkreisfläche eben ausgebildet ist.Standstill of the pump the pressure plate circular surface facing the pump element is flat.
7. Pumpe, insbesondere nach einem der vorhergehen- den Ansprüche, dadurch gekennzeichnet, dass im7. Pump, in particular according to one of the preceding claims, characterized in that in
Stillstand der Pumpe die Druckplattenringflache und die Druckplattenkreisfläche in einer Ebene liegen.When the pump is at a standstill, the pressure plate ring area and the pressure plate circle area lie in one plane.
8. Pumpe mit einem Gehäuse, das eine Ausnehmung aufweist, in der eine Pumpeneinheit angeordnet ist, die eine von einem Pumpenkammerring und zumindest einer auf dem Pumpenkammerring liegenden Druckplatte gebildete Pumpenkammer und ein drehantreibbares Pumpenelement besitzt, das in der Pumpenkammer angeordnet ist, einem die Ausnehmung verschließenden, am Gehäuse befestigten Gehäusedeckel, und mit einem von der Ausnehmung und der Druckplatte begrenzten Druckraum, gekennzeichnet durch zumindest ein in den Anmeldungsunterlagen offenbartes erfinderisches Merkmal . 8. Pump with a housing which has a recess in which a pump unit is arranged, which has a pump chamber formed by a pump chamber ring and at least one pressure plate lying on the pump chamber ring and a rotationally drivable pump element which is arranged in the pump chamber, the recess sealing housing cover fastened to the housing, and with a pressure space delimited by the recess and the pressure plate, characterized by at least one inventive feature disclosed in the application documents.
EP01940549A 2000-06-05 2001-06-01 Pump Expired - Lifetime EP1292769B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2000127812 DE10027812A1 (en) 2000-06-05 2000-06-05 Cellular pump housing with cover and pressure plates has plate and cover in one piece giving interposed constant depth pocket equal to chamber ring thickness.
DE10027812 2000-06-05
PCT/EP2001/006301 WO2001094787A1 (en) 2000-06-05 2001-06-01 Pump

Publications (2)

Publication Number Publication Date
EP1292769A1 true EP1292769A1 (en) 2003-03-19
EP1292769B1 EP1292769B1 (en) 2007-04-18

Family

ID=7644758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01940549A Expired - Lifetime EP1292769B1 (en) 2000-06-05 2001-06-01 Pump

Country Status (4)

Country Link
EP (1) EP1292769B1 (en)
DE (3) DE10027812A1 (en)
ES (1) ES2283416T3 (en)
WO (1) WO2001094787A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE460623C (en) * 1924-09-19 1928-06-01 Gustav Appel Circumferential seal for gear pumps, especially for conveying viscose to spinnerets
US2765745A (en) * 1955-02-21 1956-10-09 Harry J Sadler Pump
DE1788270U (en) * 1956-09-06 1959-05-06 Bosch Gmbh Robert GEAR LIQUID PUMP.
US4605363A (en) * 1985-03-25 1986-08-12 Sundstrand Corporation Gear pump with pivoted bushings that can deflect
DE4007858C1 (en) * 1990-03-13 1991-08-14 Rhone-Poulenc Rhodia Ag, 7800 Freiburg, De Rotary liquid pump - has pump coupled to block by symmetrically placed fastening screws
DE19528631C2 (en) * 1995-08-04 1998-07-23 Bosch Gmbh Robert Gear machine
DE19626206A1 (en) * 1996-06-29 1998-01-08 Luk Fahrzeug Hydraulik Vane pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0194787A1 *

Also Published As

Publication number Publication date
DE10192360D2 (en) 2003-06-12
ES2283416T3 (en) 2007-11-01
DE10027812A1 (en) 2001-12-13
DE50112376D1 (en) 2007-05-31
EP1292769B1 (en) 2007-04-18
WO2001094787A1 (en) 2001-12-13

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