EP0247001A2 - Vane pump for the transport of pasty foodstuffs, especially of sausage meat - Google Patents

Vane pump for the transport of pasty foodstuffs, especially of sausage meat Download PDF

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Publication number
EP0247001A2
EP0247001A2 EP87810210A EP87810210A EP0247001A2 EP 0247001 A2 EP0247001 A2 EP 0247001A2 EP 87810210 A EP87810210 A EP 87810210A EP 87810210 A EP87810210 A EP 87810210A EP 0247001 A2 EP0247001 A2 EP 0247001A2
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EP
European Patent Office
Prior art keywords
guide
slide
ring
pump according
guide 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.)
Withdrawn
Application number
EP87810210A
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German (de)
French (fr)
Other versions
EP0247001A3 (en
Inventor
Hans Dr. Wälchli
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0247001A2 publication Critical patent/EP0247001A2/en
Publication of EP0247001A3 publication Critical patent/EP0247001A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0818—Vane tracking; control therefor
    • F01C21/0827—Vane tracking; control therefor by mechanical means
    • F01C21/0836—Vane tracking; control therefor by mechanical means comprising guiding means, e.g. cams, rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/50—Intrinsic material properties or characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • a vane pump according to the preamble of claim 1 is known.
  • This pump has a housing to which a pressure plate is articulated.
  • a guide ring is arranged in the housing and a guide curve is arranged within this guide ring.
  • a slide guide with several radial slots is connected in a rotationally fixed manner to a drive shaft.
  • the slots guide slides, which are guided on the outside of the guide ring and on the inside on the guide curve.
  • a delivery chamber narrowing towards an outlet opening is formed between the slide guide and the guide ring.
  • the guide curve is loaded by a spring in the direction of the greatest width of the delivery chamber.
  • the guide curve, the slide and the guide ring are subject to wear.
  • the invention has for its object to develop a pump according to the preamble of claim 1 such that maintenance is less expensive. This object is achieved by the characterizing features of claim 1.
  • the wear is practically limited to these parts, while the slide itself and the guide ring practically no longer wear.
  • the maintenance intervals are surprisingly not shortened. This makes replacing the wearing parts considerably less expensive.
  • the guide ring can now also be made of stainless steel, which is important for the hygienic processing of pasty foods, e.g. Meatloaf, is of considerable importance.
  • the vane pump shown in FIGS. 1 and 2 has a housing 1 to which a pressure plate 2 is pivoted about an axis 3.
  • a guide ring 5 made of stainless steel is rotatably inserted in a cylindrical bore 4 of the housing 1.
  • the inner wall of the guide ring 5 consists of two circular cylinder segments 6, 7.
  • a drive shaft 10 is rotatably mounted in the housing 1.
  • a slide guide 11 is rotatably connected via a wedge 12.
  • the slide guide 11 has an annular extension 13 with a plurality of radial slots 14 at regular angular intervals.
  • slide 15 made of stainless steel are radially displaceable, only a few of which are shown.
  • the outer circumference 16 of the slide guide 11 with its extension 13 forms a crescent-shaped delivery space 17 with the segment 6 of the inner wall of the guide ring 5 and touches the segment 7 over its entire length.
  • the slides 15 are guided on the outside by the guide ring 5 and on the inside by a guide curve 20 made of plastic.
  • the outer circumference 21 of the guide curve 20, measured in the radial direction of the slide guide 11, has a costly distance from the segments 6, 7, this distance being slightly smaller than the length of the slide 15.
  • the sliders 15 therefore have a slight play between the guide curve 20 and the guide ring 5.
  • the guide curve 20 is preloaded in the direction of the suction area by a compression spring 23 arranged in a radial bore 22.
  • the spring 23 is supported on a bolt 24 guided in the bore 22 and this on a slide ring 25 which is rotatably mounted on a shoulder 26 connected coaxially to the shaft 10.
  • the bolt 24 engages in a groove 27 of the ring 26.
  • the guide curve 20 In order to secure the guide curve 20 against twisting, it has a diametrical groove 28, which runs parallel to the axis of the bore 22 and faces the pressure plate 2 and into which a wedge 29 attached to the pressure plate 2 engages.
  • the axial center plane of the groove 28 is perpendicular to the pivot axis 3 of the pressure plate 2 and, viewed in the direction of rotation A of the slide guide, is set back from the axial plane 30 of the greatest distance between the slide guide 11 and the guide ring 5.
  • a screw 31 is screwed into the ring 25, the head of which engages with play in a radial bore 32 of the guide curve 20.
  • the slides 15 have along their outer edges a groove 36, in which a plastic profile 37 is inserted, and along their edge 38 facing away from the pressure plate 2, a further groove 39.
  • the slide 15 and the slide guide 11 rest on one side on the flat inner wall 42 of the pressure plate 2 and on the other side against an exchangeable support plate 43 in the housing 1.
  • the pressure plate 2 In the suction area, that is to say seen in the direction of rotation A, somewhat in front of the axial plane 30 of the maximum width of the delivery chamber 17, the pressure plate 2 has a filling funnel 46 which feeds the delivery chamber 17 laterally.
  • a duct 47 connected to a vacuum source with an opening 48 leads into the delivery chamber 17 in front of the suction region.
  • the vacuum is released via the grooves 39 of the slide 15 and a peripheral groove 49 covered by the slide guide 11 and again fed back via the grooves 39 to a further circumferential groove 50 in the support plate 43 opposite the hopper 46.
  • the meat In the narrowing part of the delivery chamber 17, the meat is expelled radially through an opening 51 of the guide ring 5 and an outlet channel 52 in the housing 1.
  • the pressure plate 2 is folded up and the guide curve 20 together with the slide ring 25 is pulled off the shoulder 26 of the shaft 10. Now the slide 15 and the slide guide 11 can be lifted out of the housing 1. If necessary, the profiles 37 are removed from the slides 15 for cleaning. After cleaning, the slide guide 11 is first placed on the shaft 1 and the slide 15 is inserted into the slots 14 and brought into contact with the segments 6, 7. Now the guide curve 20 with the slide ring 25 is placed on the shoulder 26. When the guide curve 20 is pushed in, the bevels 40, 41 run up against one another in the suction area of the pump and center the guide curve 20 against the force of the spring 23. Because the groove 28 is perpendicular to the pivot axis 3, the wedge 29 is also pushed when the pressure plate 2 is closed little effort into the groove 28.
  • Suitable materials for the guide curve 20 and the profiles 37 are thermoplastics with high abrasion resistance and high dimensional stability, in particular PETP. Since the wear is largely limited to these two parts, the maintenance effort for the pump is low. In addition, the choice of material pairings is made considerably easier. So both the slider, as well the guide ring are made of stainless steel, which is a considerable advantage for hygienic reasons for the intended application.
  • the slides 15 seal best in the suction area, where the sealing effect is most necessary. The wear is reduced because the slides are mainly loaded radially in the diverging area of the delivery chamber 17.
  • FIG. 3 shows a partial section of a variant of the embodiment according to FIGS. 1 and 2. It differs only in that it supports the bolt 24a differently. This has a shoulder 57 of smaller diameter, which penetrates a bore 58 of a locking ring 59. This secures the bolt 24a from falling out when the pressure plate 2 is opened. When the pressure plate 2 is closed, the attachment 57 rests on one with the wedge 29a one-piece nose 60.
  • the bevels 40, 41 according to FIG. 1 are not necessary here, since the spring 23 is only tensioned when the pressure plate 2 is closed. Otherwise, the embodiment according to FIG. 3 corresponds to that according to FIGS. 1 and 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Processing Of Meat And Fish (AREA)

Abstract

A guide ring (5) with an inside wall consisting of two cylindrical segments (6, 7) is inserted into a cylindrical hole (4) in a housing (1). Inside the guide ring (5) a plastic guide cam (20) with corresponding outer wall (21) is rotationally fixed. Between these, moving slides (15) are carried in radial slots (14) of a slide guide (11) connected to a drive shaft (10). Plastic profile sections (37) are inserted in the outside edges (35) of the slides (15). The guide cam (20) is loaded by a spring (23) in the direction of the intake area (46) of the pump so that there the slides (15) slide between the guide ring (5) and guide cam (20) without any play. Due to the design of the guide cam (20) and the profile sections (37) of plastic wear is practically confined to these two components, making maintenance cheaper. In addition both the slides (15) and the guide ring (5) can thereby be made of stainless steel, which is a considerable advantage for conveying foodstuffs. <IMAGE>

Description

Aus der DE-PS 1 915 008 ist eine Flügelzellenpumpe gemäss Oberbegriff des Anspruchs 1 bekannt. Diese Pumpe hat ein Gehäuse, an welchem eine Druckplatte angelenkt ist. Im Ge­häuse ist ein Führungsring und innerhalb dieses Führungs­rings eine Führungskurve angeordnet. Mit einer Antriebs­welle ist eine Schieberführung mit mehreren radialen Schlitzen drehfest verbunden. Die Schlitze führen Schieber, die aussen am Führungsring und innen an der Führungskurve geleitet sind. Zwischen der Schieberführung und dem Führungs­ring ist ein sich gegen eine Austrittsöffnung verengender Förderraum gebildet. Die Führungskurve ist in Richtung der grössten Breite des Förderraumes durch eine Feder belastet. Bei dieser bekannten Pumpe unterliegen vor allem die Füh­rungskurve, die Schieber und der Führungsring dem Ver­schleiss. Wegen des Anwendungsgebietes wäre es erwünscht, diese Komponenten aus rostfreiem Stahl herzustellen. Dies ist jedoch nicht möglich, weil bei aufeinander gleitenden Teilen höchstens das eine aus rostfreiem Stahl bestehen kann. Man hat diesen Konflikt bisher dadurch gelöst, dass man den Führungsring und die Führungskurve aus gehärtetem, ionitriertem Stahl und die Schieber aus rostfreiem Stahl herstellte. Bei Verschleiss mussten allerdings jeweils alle drei genannten Elemente ausgewechselt werden, so dass der Unterhalt der bekannten Pumpe recht aufwendig war.From DE-PS 1 915 008 a vane pump according to the preamble of claim 1 is known. This pump has a housing to which a pressure plate is articulated. A guide ring is arranged in the housing and a guide curve is arranged within this guide ring. A slide guide with several radial slots is connected in a rotationally fixed manner to a drive shaft. The slots guide slides, which are guided on the outside of the guide ring and on the inside on the guide curve. A delivery chamber narrowing towards an outlet opening is formed between the slide guide and the guide ring. The guide curve is loaded by a spring in the direction of the greatest width of the delivery chamber. In this known pump, the guide curve, the slide and the guide ring are subject to wear. Because of the field of application, it would be desirable to manufacture these components from stainless steel. However, this is not possible because, in the case of parts sliding on one another, at most one can consist of stainless steel. So far, this conflict has been resolved by making the guide ring and the guide curve from hardened, ionitrided steel and the gate valve made of stainless steel. In the event of wear, however, all three elements mentioned had to be replaced, so that the maintenance of the known pump was quite complex.

Der Erfindung liegt die Aufgabe zugrunde, eine Pumpe gemäss Oberbegriff des Anspruchs 1 derart weiterzubilden, dass die Wartung kostengünstiger ist. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The invention has for its object to develop a pump according to the preamble of claim 1 such that maintenance is less expensive. This object is achieved by the characterizing features of claim 1.

Durch die Ausbildung der äusseren Kante der Schieber als Kunststoffteile wird der Verschleiss praktisch auf diese Teile beschränkt, während die Schieber selbst und der Füh­rungsring praktisch nicht mehr verschleissen. Die Wartungs­intervalle werden überraschenderweise nicht verkürzt. Das Auswechseln der Verschleissteile wird dadurch erheblich kostengünstiger. Zudem kann nun auch der Führungsring aus rostfreiem Stahl hergestellt werden, was für die hygienische Verarbeitung von pastösen Lebensmitteln, z.B. Fleischbrät, von erheblicher Bedeutung ist.By designing the outer edge of the slide as plastic parts, the wear is practically limited to these parts, while the slide itself and the guide ring practically no longer wear. The maintenance intervals are surprisingly not shortened. This makes replacing the wearing parts considerably less expensive. In addition, the guide ring can now also be made of stainless steel, which is important for the hygienic processing of pasty foods, e.g. Meatloaf, is of considerable importance.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung an­hand der Zeichnung erläutert. Darin zeigt:

  • Fig. 1 einen Axialschnitt durch eine Flügelzellenpumpe;
  • Fig. 2 eine Stirnansicht der Pumpe von Fig. 1 bei abgeho­bener Deckplatte, und
  • Fig. 3 einen Teilschnitt einer Variante der Ausführungs­form nach Fig. 1 und 2.
An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
  • 1 shows an axial section through a vane pump;
  • Fig. 2 is an end view of the pump of Fig. 1 with the cover plate lifted, and
  • 3 shows a partial section of a variant of the embodiment according to FIGS. 1 and 2.

Die in Fig. 1 und 2 dargestellte Flügelzellenpumpe hat ein Gehäuse 1, an welchem eine Druckplatte 2 um eine Achse 3 schwenkbar angelenkt ist. In eine zylindrische Bohrung 4 des Gehäuses 1 ist ein Führungsring 5 aus rostfreiem Stahl drehfest eingesetzt. Die Innenwand des Führungsrings 5 be­steht aus zwei Kreiszylindersegmenten 6, 7. Achsparallel, aber exzentrisch zur Bohrung 4 ist im Gehäuse 1 eine An­triebswelle 10 drehbar gelagert. Mit dieser ist eine Schie­berführung 11 über einen Keil 12 drehfest verbunden. Die Schieberführung 11 hat einen ringförmigen Ansatz 13 mit mehreren radialen Schlitzen 14 in regelmässigen Winkelab­ständen. In den Schlitzen 14 sind Schieber 15 aus rost­freiem Stahl radial verschiebbar geführt, von denen nur einige dargestellt sind. Der Aussenumfang 16 der Schieber­führung 11 mit ihrem Ansatz 13 bildet mit dem Segment 6 der Innenwand des Führungsrings 5 einen halbmondförmigen Förderraum 17 und berührt das Segment 7 über seine ganze Länge.The vane pump shown in FIGS. 1 and 2 has a housing 1 to which a pressure plate 2 is pivoted about an axis 3. In a cylindrical bore 4 of the housing 1, a guide ring 5 made of stainless steel is rotatably inserted. The inner wall of the guide ring 5 consists of two circular cylinder segments 6, 7. Axially parallel, but eccentrically to the bore 4, a drive shaft 10 is rotatably mounted in the housing 1. With this, a slide guide 11 is rotatably connected via a wedge 12. The slide guide 11 has an annular extension 13 with a plurality of radial slots 14 at regular angular intervals. In the slots 14 slide 15 made of stainless steel are radially displaceable, only a few of which are shown. The outer circumference 16 of the slide guide 11 with its extension 13 forms a crescent-shaped delivery space 17 with the segment 6 of the inner wall of the guide ring 5 and touches the segment 7 over its entire length.

Die Schieber 15 sind aussen durch den Führungsring 5 und innen durch eine Führungskurve 20 aus Kunststoff geführt. Der Aussenumfang 21 der Führungskurve 20 hat gemessen in radialer Richtung der Schieberführung 11 einen kostanten Abstand von den Segmenten 6, 7, wobei dieser Abstand ge­ringfügig kleiner als die Länge der Schieber 15 ist. Die Schieber 15 haben also geringfügig Spiel zwischen der Füh­rungskurve 20 und dem Führungsring 5. Um dieses Spiel haupt­sächlich im Ansaugbereich der Pumpe weitgehend zu eliminie­ren, ist die Führungskurve 20 durch eine in einer radialen Bohrung 22 angeordnete Druckfeder 23 in Richtung des Ansaug­bereichs vorbelastet. Die Feder 23 stützt sich auf einem in der Bohrung 22 geführten Bolzen 24 und dieser auf einem Gleitring 25 ab, der auf einem koaxial mit der Welle 10 verbundenen Ansatz 26 drehbar gelagert ist. Zur Drehsiche­rung greift der Bolzen 24 in eine Nut 27 des Rings 26 ein. Um die Führungskurve 20 gegen Verdrehen zu sichern, hat sie der Druckplatte 2 zugewandt eine diametrale, parallel zur Achse der Bohrung 22 verlaufende Nut 28, in welche ein an der Druckplatte 2 befestigter Keil 29 eingreift. Die axiale Mittelebene der Nut 28 steht senkrecht zur Schwenk­achse 3 der Druckplatte 2 und ist in Drehrichtung A der Schieberführung gesehen gegenüber der Axialebene 30 gröss­ten Abstandes zwischen Schieberführung 11 und Führungsring 5 zurückversetzt. Um bei der Demontage den Ring 25 in der Führungskurve 20 zu halten, ist in den Ring 25 eine Schraube 31 eingeschraubt, deren Kopf mit Spiel in eine radiale Bohrung 32 der Führungskurve 20 eingreift.The slides 15 are guided on the outside by the guide ring 5 and on the inside by a guide curve 20 made of plastic. The outer circumference 21 of the guide curve 20, measured in the radial direction of the slide guide 11, has a costly distance from the segments 6, 7, this distance being slightly smaller than the length of the slide 15. The sliders 15 therefore have a slight play between the guide curve 20 and the guide ring 5. In order to largely eliminate this play mainly in the suction area of the pump, the guide curve 20 is preloaded in the direction of the suction area by a compression spring 23 arranged in a radial bore 22. The spring 23 is supported on a bolt 24 guided in the bore 22 and this on a slide ring 25 which is rotatably mounted on a shoulder 26 connected coaxially to the shaft 10. To secure against rotation, the bolt 24 engages in a groove 27 of the ring 26. In order to secure the guide curve 20 against twisting, it has a diametrical groove 28, which runs parallel to the axis of the bore 22 and faces the pressure plate 2 and into which a wedge 29 attached to the pressure plate 2 engages. The axial center plane of the groove 28 is perpendicular to the pivot axis 3 of the pressure plate 2 and, viewed in the direction of rotation A of the slide guide, is set back from the axial plane 30 of the greatest distance between the slide guide 11 and the guide ring 5. In order to keep the ring 25 in the guide curve 20 during disassembly, a screw 31 is screwed into the ring 25, the head of which engages with play in a radial bore 32 of the guide curve 20.

Die Schieber 15 haben längs ihrer äusseren Kanten eine Nut 36, in welche ein Kunststoffprofil 37 eingesetzt ist, und längs ihrer der Druckplatte 2 abgewandten Kante 38 eine weitere Nut 39. An der inneren, der Druckplatte 2 zuge­wandten Ecke haben sie eine Anschrägung 40, die beim Mon­tieren der Führungskurve 20 mit einer sich über einen dem Ansaugbereich zugewandten Sektor erstreckende Anschrägung 41 der Führungskurve 20 zusammenwirkt, um diese gegen die Kraft der Feder 23 zu zentrieren. Die Schieber 15 und die Schieberführung 11 liegen auf der einen Seite an der ebenen Innenwand 42 der Druckplatte 2 und auf der andern Seite an einer auswechselbaren Auflageplatte 43 im Gehäuse 1 an.The slides 15 have along their outer edges a groove 36, in which a plastic profile 37 is inserted, and along their edge 38 facing away from the pressure plate 2, a further groove 39. On the inner corner facing the pressure plate 2, they have a bevel 40 which when assembling the guide curve 20 cooperates with a bevel 41 of the guide curve 20 which extends over a sector facing the suction region in order to center it against the force of the spring 23. The slide 15 and the slide guide 11 rest on one side on the flat inner wall 42 of the pressure plate 2 and on the other side against an exchangeable support plate 43 in the housing 1.

Im Ansaugbereich, also in Drehrichtung A gesehen, etwas vor der Axialebene 30 maximaler Breite des Förderraumes 17, hat die Druckplatte 2 einen Einfülltrichter 46, welcher den Förderraum 17 seitlich beschickt. Um das Brät in den Förderraum 17 einzusaugen, führt vor dem Ansaugbereich ein an eine Vakuumquelle angeschlossener Kanal 47 mit einer Mündung 48 in den Förderraum 17. Das Vakuum wird über die Nuten 39 der Schieber 15 und eine durch die Schieberführung 11 abgedeckte Umfangsnut 49 und wieder zurück über die Nuten 39 einer weiteren, dem Einfülltrichter 46 gegenüber­liegende Umfangsnut 50 in der Auflageplatte 43 zugeführt. Im verengenden Teil des Förderraumes 17 wird das Brät ra­dial durch eine Oeffnung 51 des Führungsrings 5 und einen Austrittskanal 52 im Gehäuse 1 ausgestossen.In the suction area, that is to say seen in the direction of rotation A, somewhat in front of the axial plane 30 of the maximum width of the delivery chamber 17, the pressure plate 2 has a filling funnel 46 which feeds the delivery chamber 17 laterally. In order to suck the sausage meat into the delivery chamber 17, a duct 47 connected to a vacuum source with an opening 48 leads into the delivery chamber 17 in front of the suction region. The vacuum is released via the grooves 39 of the slide 15 and a peripheral groove 49 covered by the slide guide 11 and again fed back via the grooves 39 to a further circumferential groove 50 in the support plate 43 opposite the hopper 46. In the narrowing part of the delivery chamber 17, the meat is expelled radially through an opening 51 of the guide ring 5 and an outlet channel 52 in the housing 1.

Beim Einsatz der Pumpe zum Fördern von Wurstbrät muss sie täglich demontiert und gereinigt werden. Dazu wird die Druckplatte 2 hochgeklappt und die Führungskurve 20 samt Gleitring 25 vom Ansatz 26 der Welle 10 abgezogen. Nun können die Schieber 15 und die Schieberführung 11 aus dem Gehäuse 1 herausgehoben werden. Gegebenenfalls werden zur Reinigung noch die Profile 37 aus den Schiebern 15 ent­fernt. Nach der Reinigung wird zunächst die Schieberfüh­rung 11 auf die Welle 1 aufgesetzt und die Schieber 15 in die Schlitze 14 eingeführt und zur Anlage an die Segmente 6, 7 gebracht. Nun wird die Führungskurve 20 mit dem Gleit­ring 25 auf den Ansatz 26 aufgesetzt. Beim Einschieben der Führungskurve 20 laufen die Anschrägungen 40, 41 im Ansaug­bereich der Pumpe aneinander auf und zentrieren die Füh­rungskurve 20 gegen die Kraft der Feder 23. Weil die Nut 28 senkrecht zur Schwenkachse 3 steht, schiebt sich beim Schliessen der Druckplatte 2 der Keil 29 mit geringem Auf­wand in die Nut 28.If the pump is used to pump sausage meat, it must be dismantled and cleaned daily. For this purpose, the pressure plate 2 is folded up and the guide curve 20 together with the slide ring 25 is pulled off the shoulder 26 of the shaft 10. Now the slide 15 and the slide guide 11 can be lifted out of the housing 1. If necessary, the profiles 37 are removed from the slides 15 for cleaning. After cleaning, the slide guide 11 is first placed on the shaft 1 and the slide 15 is inserted into the slots 14 and brought into contact with the segments 6, 7. Now the guide curve 20 with the slide ring 25 is placed on the shoulder 26. When the guide curve 20 is pushed in, the bevels 40, 41 run up against one another in the suction area of the pump and center the guide curve 20 against the force of the spring 23. Because the groove 28 is perpendicular to the pivot axis 3, the wedge 29 is also pushed when the pressure plate 2 is closed little effort into the groove 28.

Als Werkstoff für die Führungskurve 20 und die Profile 37 eignen sich thermoplastische Kunststoffe hoher Abrieb­festigkeit und hoher Formbeständigkeit, insbesondere PETP. Da der Verschleiss weitgehend auf diese beiden Teile beschränkt ist, ist der Wartungsaufwand für die Pumpe ge­ring. Ausserdem ist die Wahl der Materialpaarungen erheb­lich erleichtert. So können sowohl die Schieber, als auch der Führungsring aus rostfreiem Stahl hergestellt werden, was für das vorgesehene Anwendungsgebiet aus hygienischen Gründen ein erheblicher Vorteil ist. Durch das Zurückver­setzen der Axialebene der Bohrung 22 sowie der Nut 28 ge­genüber der Ebene 30 grösster radialer Breite des Förder­raumes 17 werden mehrere Vorteile erzielt: Die Schieber 15 dichten im Ansaugbereich am besten, wo die Dichtwirkung am nötigsten ist. Der Verschleiss wird reduziert, weil die Schieber hauptsächlich im divergierenden Bereich des Förder­raumes 17 radial belastet sind. Beim Schliessen der Druck­platte 2 gleitet der Keil 29 mühelos in die Nut 28. Die Vorspannkraft der Feder 23 ist nicht einstellbar und da­mit entfällt erhöhter Verschleiss durch Fehlmanipulation durch das Bedienungspersonal. Die Federkraft kann beim Hersteller optimiert werden. Die erläuterte Konstruktion erlaubt eine rasche und einfache Montage und Demontage der Arbeitsteile der Pumpe, was die tägliche Reinigung wesent­lich erleichtert.Suitable materials for the guide curve 20 and the profiles 37 are thermoplastics with high abrasion resistance and high dimensional stability, in particular PETP. Since the wear is largely limited to these two parts, the maintenance effort for the pump is low. In addition, the choice of material pairings is made considerably easier. So both the slider, as well the guide ring are made of stainless steel, which is a considerable advantage for hygienic reasons for the intended application. By moving the axial plane of the bore 22 and the groove 28 back from the plane 30 of the greatest radial width of the delivery chamber 17, several advantages are achieved: the slides 15 seal best in the suction area, where the sealing effect is most necessary. The wear is reduced because the slides are mainly loaded radially in the diverging area of the delivery chamber 17. When the pressure plate 2 is closed, the wedge 29 slides effortlessly into the groove 28. The pretensioning force of the spring 23 cannot be adjusted and thus increased wear due to incorrect manipulation by the operating personnel is eliminated. The spring force can be optimized at the manufacturer. The construction explained allows quick and easy assembly and disassembly of the working parts of the pump, which makes daily cleaning much easier.

In Fig. 3 ist ein Teilschnitt einer Variante der Ausfüh­rungsform nach Fig. 1 und 2 dargestellt. Sie unterscheidet sich davon lediglich durch eine andere Abstützung des Bol­zens 24a. Dieser hat hier einen Ansatz 57 kleineren Durch­messers, der eine Bohrung 58 eines Sicherungsrings 59 durchdringt. Dieser sichert den Bolzen 24a vor dem Heraus­fallen beim Oeffnen der Druckplatte 2. Der Ansatz 57 stützt sich bei geschlossener Druckplatte 2 auf einer mit dem Keil 29a einstückigen Nase 60 ab. Die Anschrägungen 40, 41 ge­mäss Fig. 1 sind hier nicht erforderlich, da die Feder 23 erst beim Schliessen der Druckplatte 2 gespannt wird. Im übrigen entspricht die Ausführungsform nach Fig. 3 jener nach den Fig. 1 und 2.3 shows a partial section of a variant of the embodiment according to FIGS. 1 and 2. It differs only in that it supports the bolt 24a differently. This has a shoulder 57 of smaller diameter, which penetrates a bore 58 of a locking ring 59. This secures the bolt 24a from falling out when the pressure plate 2 is opened. When the pressure plate 2 is closed, the attachment 57 rests on one with the wedge 29a one-piece nose 60. The bevels 40, 41 according to FIG. 1 are not necessary here, since the spring 23 is only tensioned when the pressure plate 2 is closed. Otherwise, the embodiment according to FIG. 3 corresponds to that according to FIGS. 1 and 2.

Claims (9)

1. Flügelzellenpumpe zum Fördern von pastösen Lebensmitteln, umfassend ein Gehäuse (1), an welchem eine Druckplatte (2) lösbar befestigt ist, einen im Gehäuse (1) gehaltenen Führungsring (5), eine innerhalb des Führungs­rings (5) angeordnete Führungskurve (20), eine mit einer Antriebswelle (10) drehfest verbundene Schieberführung (11) mit mehreren radialen Schlitzen (14), in welchen Schieber (15) radial beweglich geführt sind, wobei die Schieber (15) aussen durch den Führungsring (5) und innen durch die Führungskurve (20) geführt sind und die Führungs­kurve (20) in einer festen radialen Richtung durch eine Feder (23) gegen den Führungsring (5) vorbelastet ist, und wobei zwischen dem Führungsring (5) und der Schieber­führung (11) ein Förderraum (17) gebildet ist, der sich gegen eine Austrittsöffnung (5) verengt, dadurch gekenn­zeichnet, dass in den Schiebern (15) längs ihren radial äusseren, am Führungsring (5) gleitenden Kanten (35) ein Kunststoffprofil (37) eingesetzt ist.1. Vane pump for conveying pasty foods, comprising a housing (1) to which a pressure plate (2) is detachably fastened, a guide ring (5) held in the housing (1), a guide curve (20) arranged within the guide ring (5) ), a slide guide (11) with a plurality of radial slots (14), which is connected in a rotationally fixed manner to a drive shaft (10) and in which slide (15) is guided in a radially movable manner, the slide (15) outside through the guide ring (5) and inside through the guide curve (20) is guided and the guide curve (20) is preloaded in a fixed radial direction by a spring (23) against the guide ring (5), and a conveying space () between the guide ring (5) and the slide guide (11) 17) is formed, which narrows against an outlet opening (5), characterized in that in the slides (15) along their radial A plastic profile (37) is inserted on the outer edges (35) sliding on the guide ring (5). 2. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Feder (23) in einer radialen Bohrung (22) der Führungskurve (20) angeordnet ist und sich über einen in der Bohrung (22) verschiebbaren Bolzen (24) abstützt.2. Pump according to claim 1, characterized in that the spring (23) is arranged in a radial bore (22) of the guide curve (20) and is supported by a bolt (24) displaceable in the bore (22). 3. Pumpe nach Anspruch 2, dadurch gekennzeichnet, dass der Bolzen (24) auf einem koaxial mit der Antriebs­welle (10) verbundenen Ansatz (26) abgestützt ist.3. Pump according to claim 2, characterized in that the bolt (24) is supported on a coaxially connected to the drive shaft (10) projection (26). 4. Pumpe nach einem der Ansprüche 1 bis 3, da­durch gekennzeichnet, dass die Druckplatte (2) um eine Schwenkachse (3) schwenkbar am Gehäuse (1) angebracht ist, dass die Führungskurve (20) eine diametrale Nut (28) mit rechteckigem Querschnitt aufweist, die mit einem mit der Druckplatte (2) verbundenen Führungselement (29) geführt ist, und dass die Längsrichtung der Nut (28) senkrecht zur Schwenkachse (3) angeordnet ist.4. Pump according to one of claims 1 to 3, characterized in that the pressure plate (2) about a pivot axis (3) is pivotally mounted on the housing (1), that the guide curve (20) has a diametrical groove (28) with a rectangular cross section which is guided with a guide element (29) connected to the pressure plate (2), and that the longitudinal direction of the groove (28) is arranged perpendicular to the pivot axis (3). 5. Pumpe nach den Ansprüchen 3 und 4, dadurch gekennzeichnet, dass die Achse der radialen Bohrung (22) in der axialen Mittelebene der Nut (28) angeordnet ist.5. Pump according to claims 3 and 4, characterized in that the axis of the radial bore (22) is arranged in the axial central plane of the groove (28). 6. Pumpe nach Anspruch 5, dadurch gekennzeichnet, dass sich der Bolzen (24) auf einem auf dem Ansatz (26) drehbaren und axial verschiebbaren Gleitring (25) abstützt, und dass der Gleitring (25) gegenüber der Führungskurve (11) gegen Verdrehen und axiale Verschiebung gesichert ist.6. Pump according to claim 5, characterized in that the bolt (24) is supported on a on the extension (26) rotatable and axially displaceable slide ring (25), and that the slide ring (25) against rotation against the guide curve (11) and axial displacement is secured. 7. Pumpe nach Anspruch 5 oder 6, dadurch gekenn­zeichnet, dass die axiale Mittelebene der Nut (28) in Drehrichtung (A) der Schieberführung (11) gegenüber der Axialebene (30) grössten Abstandes zwischen Schieberfüh­rung (11) und Führungsring (5) zurückversetzt ist.7. Pump according to claim 5 or 6, characterized in that the axial center plane of the groove (28) in the direction of rotation (A) of the slide guide (11) with respect to the axial plane (30) largest distance between the slide guide (11) and guide ring (5) is set back is. 8. Pumpe nach einem der Ansprüche 5 bis 7, da­durch gekennzeichnet, dass die Führungskurve (20) auf der der Nut (28) abgewandten Seite über einen dem Ansaugbereich zugewandten Sektor ihrer Peripherie (21) eine Anschrägung (41) aufweist, die mit entsprechenden Anschrägungen (40) der Schieber (15) beim Einsetzen der Führungskurve (20) zum Spannen der Feder (23) zusammenwirkt.8. Pump according to one of claims 5 to 7, characterized in that the guide curve (20) on the side facing away from the groove (28) has a bevel (41) with a corresponding chamfer over a sector of its periphery (21) facing the suction area Bevels (40) of the slide (15) interact when the guide curve (20) is inserted to tension the spring (23). 9. Pumpe nach einem der Ansprüche 1 bis 8, da­durch gekennzeichnet, dass die Führungskurve (11) aus Kunststoff besteht.9. Pump according to one of claims 1 to 8, characterized in that the guide curve (11) consists of plastic.
EP87810210A 1986-05-22 1987-04-06 Vane pump for the transport of pasty foodstuffs, especially of sausage meat Withdrawn EP0247001A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2073/86 1986-05-22
CH207386 1986-05-22

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EP0247001A2 true EP0247001A2 (en) 1987-11-25
EP0247001A3 EP0247001A3 (en) 1988-09-28

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EP87810210A Withdrawn EP0247001A3 (en) 1986-05-22 1987-04-06 Vane pump for the transport of pasty foodstuffs, especially of sausage meat

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001679A1 (en) * 1991-01-16 1994-01-20 Vaehaesalo Perttu Hydraulic motor
EP0921313A3 (en) * 1997-12-08 2000-03-01 Hans Dr. Wälchli Vane pump
DE102011116869A1 (en) * 2011-10-25 2013-04-25 Danfoss A/S Vane machine
US9279424B2 (en) 2011-10-25 2016-03-08 Danfoss A/S Vane cell machine having plates containing axial moving inserts bearing against the rotor
CN110332120A (en) * 2019-08-02 2019-10-15 珠海凌达压缩机有限公司 Pressing plate and compressor
EP3020917B1 (en) * 2014-11-14 2020-07-15 Danfoss A/S Hydraulic vane cell machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR26703E (en) * 1922-07-28 1924-03-06 Rotary pump with independent vanes with instantaneous circumferential and lateral clearance adjustment without disassembly
US1943561A (en) * 1932-07-06 1934-01-16 Nat Transit Pump & Machine Com Blade for rotary pumps
US2968253A (en) * 1958-10-03 1961-01-17 Autio Paul Rotary pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR26703E (en) * 1922-07-28 1924-03-06 Rotary pump with independent vanes with instantaneous circumferential and lateral clearance adjustment without disassembly
US1943561A (en) * 1932-07-06 1934-01-16 Nat Transit Pump & Machine Com Blade for rotary pumps
US2968253A (en) * 1958-10-03 1961-01-17 Autio Paul Rotary pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001679A1 (en) * 1991-01-16 1994-01-20 Vaehaesalo Perttu Hydraulic motor
EP0921313A3 (en) * 1997-12-08 2000-03-01 Hans Dr. Wälchli Vane pump
DE102011116869A1 (en) * 2011-10-25 2013-04-25 Danfoss A/S Vane machine
US8951027B2 (en) 2011-10-25 2015-02-10 Danfoss A/S Vane cell machine
DE102011116869B4 (en) * 2011-10-25 2015-07-02 Danfoss A/S Vane machine
US9279424B2 (en) 2011-10-25 2016-03-08 Danfoss A/S Vane cell machine having plates containing axial moving inserts bearing against the rotor
EP3020917B1 (en) * 2014-11-14 2020-07-15 Danfoss A/S Hydraulic vane cell machine
CN110332120A (en) * 2019-08-02 2019-10-15 珠海凌达压缩机有限公司 Pressing plate and compressor

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