EP3631169B1 - Vane pump or compressor - Google Patents

Vane pump or compressor Download PDF

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Publication number
EP3631169B1
EP3631169B1 EP18725458.6A EP18725458A EP3631169B1 EP 3631169 B1 EP3631169 B1 EP 3631169B1 EP 18725458 A EP18725458 A EP 18725458A EP 3631169 B1 EP3631169 B1 EP 3631169B1
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EP
European Patent Office
Prior art keywords
vanes
wall
braking
vane pump
blocking
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EP18725458.6A
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German (de)
French (fr)
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EP3631169A1 (en
Inventor
Stefan Haar
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Saeta GmbH and Co KG
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Saeta GmbH and Co KG
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Publication of EP3631169A1 publication Critical patent/EP3631169A1/en
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Classifications

    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0881—Construction of vanes or vane holders the vanes consisting of two or more parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/19—Temperature
    • 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
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/042—Expansivity
    • 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
    • F05C2251/00—Material properties
    • F05C2251/08—Shape memory

Definitions

  • the invention relates to a vane pump or compressor according to claim 1.
  • An overpressure safety device does not prevent the pump from running dry. It is known to use thermostats for this purpose, which switch off the pump when a certain temperature is reached. When such a pump is arranged on a vehicle (e.g. tanker), such a switch-off cannot be implemented as easily as desired. In addition, the control must also have a minimum requirement for functional safety for this, in particular on overheating protection for explosion protection.
  • a hydraulic vane pump in which the interior of the rotor is radially provided with several vane grooves and vanes are slidably arranged in the wing grooves.
  • a restriction system for limiting radial sliding of the blades on the rotor is disposed on the rotor and selectively applies a force to the blades to increase the friction between the blades and the sides.
  • Out EP 2 295 720 A1 there is known a compressor having a compression mechanism for compressing a working fluid and an expansion mechanism for expanding the working fluid.
  • the expansion mechanism includes a variable wing mechanism that controls the movement of a first wing.
  • the invention is based on the object of creating a vane pump which is reliably protected against overheating during operation.
  • At least one braking or blocking element is arranged in the vanes or in the walls of the recesses, which between a braking or blocking position in which it interacts with the wall of the recess or the vane in a form or force-fluid manner and a release position in which the wings can move freely in the recesses, wherein the braking and blocking element can be brought into the braking or blocking position from a predetermined temperature. This is done with a fabric that expands under heat or a metal that expands under heat.
  • a structurally simple measure ensures that, from a predetermined temperature, the vanes are prevented from emerging from the recesses. You can therefore not come into engagement with the wall of the cylinder space and bring about no temperature increase even when running dry. If the temperature drops back to an acceptable value, the vane pump can continue to operate as before. Control and shutdown processes in particular can develop because the overtemperature protection works exclusively mechanically.
  • a bimetallic spring is fixed in a recess of the wing or the wall of the recess, such that from a predetermined temperature in the cylinder space or in the engine, an end section of the bimetal spring emerges laterally from the wings or the wall and engages with the wall or the wings in a blocking or braking manner.
  • a blocking recess is preferably formed in the wall of the recess or laterally in the wings, into which the end section engages in the blocking position.
  • the blocking recess is preferably formed in the wall of the recesses. Arranging a bimetal spring in a wall recess is more complex than in the wing.
  • a braking element closes a side pocket in the wings or in the wall of the recesses which is filled with an expansion material.
  • the braking element can be designed as a cover of a pocket, which closes the pocket and is, for example, welded in.
  • the braking element can also be designed as a type of piston that is acted upon by the expansion material.
  • the vane pump according to the Fig. 1 and 2 has a housing 10 in which a cylindrical pump chamber 12 is arranged.
  • a rotor 14 is arranged in the pump chamber with an axis of rotation eccentric to the pump chamber 12.
  • blades 18 are arranged to be radially movable.
  • Bimetal springs 22 with a bent end section 24 are arranged in recesses 20 of the wings.
  • a blocking recess 26 is formed in the wall of the recesses 16 in the lower region.
  • the blades 18 are pressed outward by centrifugal force against the cylinder wall of the pump chamber 12, the contour of which determines the position of the blades 18 relative to their recess 16. This is well known.
  • the hook-shaped end section 24 of the bimetallic springs is located within the contour of the wings 18 so that they can move freely.
  • the bimetallic springs are attached to the wing at 28, for example by rivets, as shown schematically.
  • the end portion 24 has hooked into the blocking recess 26 so that the wings 18 are held in their recesses 16. This hooking occurs when the bimetallic spring 22 is deformed due to an increase in temperature above a predetermined value. As a result, the vane pump no longer pumps and a rise in temperature is prevented.
  • the rear side of the wings 18 is shown, with the attachment of the leaf-shaped bimetallic spring 22.
  • the plastic wings 18 have spaced-apart ribs 36 on the rear side. In the sections between the ribs 36, the upper end of the bimetal spring 22 is riveted approximately in the middle. It extends with its lower section through a recess on the back of the wings 18 (see in particular Fig. 4 ).
  • Wings 18 a which are movable in the radial recesses 16, differ from the wings 18 in that a pocket 40 is formed approximately in the center near their upper end and is filled with an expansion material 42. The pocket is closed by an elastically deformable cover 44.
  • the expansion material 42 expands, as a result of which the wings are clamped in the recesses 16. As a result, the pump no longer pumps, so that a rise in temperature is prevented.
  • a locking element such as the hook 24 of a bimetallic spring, can be actuated which, when the expansion material expands, is then provided with a recess, such as the recess 26 in the Fig. 1 and 2 , cooperates.

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

Description

Die Erfindung bezieht sich auf eine Flügelzellenpumpe oder -kompressor nach Anspruch 1.The invention relates to a vane pump or compressor according to claim 1.

Wenn Flügelzellenpumpen trockenlaufen oder gegen geschlossene oder stark gedrosselte Schieber pumpen, entwickeln sie naturgemäß Wärme, die bis zu einem Brand führen kann. Als Schutz gegenüber Druck sind Überdruckventile bekannt, die den Druck gesteuert auf nahezu Null absenken können. Hierfür ist in der Regel Druckluft erforderlich, die auf Fahrzeugen nicht immer verfügbar ist. Außerdem können Steuerungen für die Schieber manipuliert sein oder wegen fehlender Wartung versagen.When vane pumps run dry or pump against closed or strongly throttled valves, they naturally develop heat that can lead to fire. Pressure relief valves, which can reduce the pressure to almost zero in a controlled manner, are known as protection against pressure. This usually requires compressed air, which is not always available on vehicles. In addition, controls for the slides can be tampered with or fail due to a lack of maintenance.

Eine Überdrucksicherung hilft nicht gegen ein Trockenlaufen der Pumpe. Es ist bekannt, hierfür Thermostate zu verwenden, die bei Erreichen einer bestimmten Temperatur die Pumpe abschalten. Ein derartiges Abschalten ist bei einer Anordnung einer derartigen Pumpe auf einem Fahrzeug (z.B. Tankfahrzeug) nicht beliebig einfach zu bewerkstelligen. Außerdem muss auch hierfür die Steuerung eine Mindestanforderung an funktionaler Sicherheit aufweisen, insbesondere auf einem Überheizungsschutz für den Explosionsschutz.An overpressure safety device does not prevent the pump from running dry. It is known to use thermostats for this purpose, which switch off the pump when a certain temperature is reached. When such a pump is arranged on a vehicle (e.g. tanker), such a switch-off cannot be implemented as easily as desired. In addition, the control must also have a minimum requirement for functional safety for this, in particular on overheating protection for explosion protection.

Aus US 4 472 119 A ist ein Drehflügelkompressor bekannt mit einem Flügelhaltemittel, das bewegt werden kann, um die Flügel in einer zurückgezogenen oder nicht arbeitenden Position innerhalb von durch einen Rotor definierten Führungsschlitzen in Eingriff zu bringen und zu halten. Die Rückhaltemittel werden durch hydraulisches Steuerfluid in die Stellung in Eingriff mit dem Flügel gebracht.Out U.S. 4,472,119 A there is known a rotary vane compressor having vane retaining means which can be moved to engage and hold the vanes in a retracted or inoperative position within guide slots defined by a rotor. The restraint means are brought into position in engagement with the wing by hydraulic control fluid.

Aus CN 102 817 834 A ist eine hydraulische Flügelzellenpumpe bekannt, bei der der Innenraum des Rotors radial mit mehreren Flügelnuten versehen ist und Flügel verschiebbar in den Flügelnuten angeordnet sind. Ein Begrenzungssystem zum Begrenzen des radialen Gleitens der Flügel auf dem Rotor ist auf dem Rotor angeordnet und bringt selektiv eine auf die Flügel wirkende Kraft auf, um die Reibung zwischen den Flügeln und den Seiten zu erhöhen.Out CN 102 817 834 A a hydraulic vane pump is known in which the interior of the rotor is radially provided with several vane grooves and vanes are slidably arranged in the wing grooves. A restriction system for limiting radial sliding of the blades on the rotor is disposed on the rotor and selectively applies a force to the blades to increase the friction between the blades and the sides.

Aus EP 2 295 720 A1 ist ein Kompressor mit einem Kompressionsmechanismus zum Komprimieren eines Arbeitsfluids und einem Expansionsmechanismus zum Expandieren des Arbeitsfluids bekannt. Der Expansionsmechanismus umfasst einen variablen Flügelmechanismus, der die Bewegung eines ersten Flügels steuert.Out EP 2 295 720 A1 there is known a compressor having a compression mechanism for compressing a working fluid and an expansion mechanism for expanding the working fluid. The expansion mechanism includes a variable wing mechanism that controls the movement of a first wing.

Aus DE 196 51 413 C1 ist weiterhin ein Flügelzellenverdichter für Heißgas bekannt und aus DE 14 51 879 A1 eine Rotationskolbenmaschine.Out DE 196 51 413 C1 a vane compressor for hot gas is also known and made DE 14 51 879 A1 a rotary piston machine.

Der Erfindung liegt die Aufgabe zugrunde, eine Flügelzellenpumpe zu schaffen, die im Betrieb sicher gegen Überhitzung geschützt ist.The invention is based on the object of creating a vane pump which is reliably protected against overheating during operation.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is achieved by the features of claim 1.

Bei der erfindungsgemäßen Flügelzellenpumpe ist in den Flügeln oder in den Wandungen der Ausnehmungen mindestens ein Brems- oder Blockierelement angeordnet, das zwischen einer Brems- oder Blockierposition, in der es form- oder kraftflüssig mit der Wandung der Ausnehmung oder dem Flügel zusammenwirkt und einer Freigabeposition, in der die Flügel sich frei in den Ausnehmungen bewegen können, bewegbar ist, wobei das Brems- und Blockierelement ab einer vorgegebenen Temperatur in die Brems- oder Blockierposition bringbar ist. Dies geschieht mit einem unter Wärme dehnenden Stoff oder einem wärmedehnemden Metall.In the vane pump according to the invention, at least one braking or blocking element is arranged in the vanes or in the walls of the recesses, which between a braking or blocking position in which it interacts with the wall of the recess or the vane in a form or force-fluid manner and a release position in which the wings can move freely in the recesses, wherein the braking and blocking element can be brought into the braking or blocking position from a predetermined temperature. This is done with a fabric that expands under heat or a metal that expands under heat.

Bei der erfindungsgemäßen Flügelzellenpumpe ist durch eine konstruktiv einfache Maßnahme gewährleistet, dass ab einer vorgegebenen Temperatur die Flügel daran gehindert werden, aus den Ausnehmungen herauszutreten. Sie können daher nicht mit der Wandung des Zylinderraums in Eingriff treten und auch bei Trockenlauf keine Temperaturerhöhung bewerkstelligen. Sinkt die Temperatur wieder auf einen annehmbaren Wert zurück, kann die Flügelzellenpumpe wie bisher weiterbetrieben werden. Besonders Steuerungs- und Abschaltvorgänge können daher entfalten, weil der Übertemperaturschutz ausschließlich mechanisch wirkt.In the vane pump according to the invention, a structurally simple measure ensures that, from a predetermined temperature, the vanes are prevented from emerging from the recesses. You can therefore not come into engagement with the wall of the cylinder space and bring about no temperature increase even when running dry. If the temperature drops back to an acceptable value, the vane pump can continue to operate as before. Control and shutdown processes in particular can develop because the overtemperature protection works exclusively mechanically.

Nach einer Ausgestaltung der Erfindung ist vorgesehen, dass eine Bimetallfeder in einer Ausnehmung der Flügel oder der Wandung der Ausnehmung fixiert angeordnet ist, derart, dass ab einer vorgegebenen Temperatur im Zylinderraum bzw. im Motor ein Endabschnitt der Bimetallfeder seitlich aus den Flügeln oder der Wandung austritt und blockierend oder bremsend mit der Wandung bzw. den Flügeln in Eingriff tritt.According to one embodiment of the invention, it is provided that a bimetallic spring is fixed in a recess of the wing or the wall of the recess, such that from a predetermined temperature in the cylinder space or in the engine, an end section of the bimetal spring emerges laterally from the wings or the wall and engages with the wall or the wings in a blocking or braking manner.

Vorzugsweise ist in der Wandung der Ausnehmung oder seitlich in den Flügeln eine Blockieraussparung geformt, in die in der Blockierposition der Endabschnitt eingreift. Vorzugsweise ist die Blockieraussparung in der Wandung der Ausnehmungen geformt. Eine Bimetallfeder in einer Wandausnehmung anzuordnen ist aufwendiger als im Flügel.A blocking recess is preferably formed in the wall of the recess or laterally in the wings, into which the end section engages in the blocking position. The blocking recess is preferably formed in the wall of the recesses. Arranging a bimetal spring in a wall recess is more complex than in the wing.

Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass ein Bremselement eine seitliche Tasche in den Flügeln oder in der Wandung der Ausnehmungen verschließt, die mit einem Dehnstoff gefüllt ist. Das Bremselement kann als Deckel einer Tasche ausgeführt werden, der die Tasche verschließt und zum Beispiel eingeschweißt ist. Alternativ kann das Bremselement auch als eine Art Kolben ausgeführt werden, der vom Dehnstoff beaufschlagt wird.According to a further embodiment of the invention it is provided that a braking element closes a side pocket in the wings or in the wall of the recesses which is filled with an expansion material. The braking element can be designed as a cover of a pocket, which closes the pocket and is, for example, welded in. Alternatively, the braking element can also be designed as a type of piston that is acted upon by the expansion material.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt äußerst schematisch einen Querschnitt durch eine Flügelzellenpumpe nach der Erfindung.
Fig. 2
zeigt die gleiche Ansicht wie Fig. 1, jedoch im Blockierzustand der Flügel.
Fig. 3
zeigt schematisch einen Flügel der Flügelzellenpumpe nach den Figuren 1 und 2 mit einer Bimetallfeder.
Fig. 4
zeigt einen im Bereich der Bimetallfeder nach Fig. 3 weggeschnittenen Teil des übrigen Flügels.
Fig. 5
zeigt wiederum äußerst schematisch einen Querschnitt durch eine erfindungsgemäße Flügelzellenpumpe in einer anderen Ausführungsform.
Fig. 6
zeigt den Abschnitt eines Flügels der Flügelzellenpumpe nach Fig. 5.
Fig. 7
zeigt einen Schnitt durch den Flügel nach Fig. 6 im Bereich eines Blockier- bzw. Bremselements.
Exemplary embodiments of the invention are explained in more detail below with reference to drawings.
Fig. 1
shows extremely schematically a cross section through a vane pump according to the invention.
Fig. 2
shows the same view as Fig. 1 , but in the blocked state of the wings.
Fig. 3
shows schematically a wing of the vane pump according to the Figures 1 and 2 with a bimetal spring.
Fig. 4
shows one in the area of the bimetal spring Fig. 3 cut away part of the rest of the wing.
Fig. 5
again shows, extremely schematically, a cross section through a vane pump according to the invention in another embodiment.
Fig. 6
shows the section of a wing of the vane pump Fig. 5 .
Fig. 7
shows a section through the wing Fig. 6 in the area of a blocking or braking element.

Die Flügelzellenpumpe nach den Fig. 1 und 2 weist ein Gehäuse 10 auf, in dem ein zylindrischer Pumpenraum 12 angeordnet ist. Im Pumpenraum ist ein Rotor 14 angeordnet mit einer Drehachse exzentrisch zum Pumpenraum 12. In vier um 90° versetzten radialen Ausnehmungen 16 sind Flügel 18 radial beweglich angeordnet. In Ausnehmungen 20 der Flügel sind Bimetallfedern 22 angeordnet mit einem abgebogenen Endabschnitt 24. In der Wandung der Ausnehmungen 16 ist im unteren Bereich eine Blockieraussparung 26 geformt.The vane pump according to the Fig. 1 and 2 has a housing 10 in which a cylindrical pump chamber 12 is arranged. A rotor 14 is arranged in the pump chamber with an axis of rotation eccentric to the pump chamber 12. In four by 90 ° staggered radial recesses 16, blades 18 are arranged to be radially movable. Bimetal springs 22 with a bent end section 24 are arranged in recesses 20 of the wings. A blocking recess 26 is formed in the wall of the recesses 16 in the lower region.

Im Betrieb werden die Flügel 18 durch Zentrifugalkraft nach außen gedrückt gegen die Zylinderwandung des Pumpenraums 12, dessen Kontur die Lage der Flügel 18 relativ zu ihrer Ausnehmung 16 bestimmt. Dies ist allgemein bekannt. Im Betrieb befindet sich der hakenförmige Endabschnitt 24 der Bimetallfedern innerhalb der Kontur der Flügel 18, sodass diese sich frei bewegen können. Die Bimetallfedern sind bei 28 am Flügel befestigt, beispielsweise durch Nieten, wie schematisch dargestellt ist. Nur der Vollständigkeit halber sei auf den Saugkanal 30 und den Druckkanal 32 der Pumpe hingewiesen.During operation, the blades 18 are pressed outward by centrifugal force against the cylinder wall of the pump chamber 12, the contour of which determines the position of the blades 18 relative to their recess 16. This is well known. In operation, the hook-shaped end section 24 of the bimetallic springs is located within the contour of the wings 18 so that they can move freely. The bimetallic springs are attached to the wing at 28, for example by rivets, as shown schematically. For the sake of completeness, reference is made to the suction channel 30 and the pressure channel 32 of the pump.

Wie in Fig. 2 dargestellt, hat sich der Endabschnitt 24 in die Blockieraussparung 26 eingehakt, sodass die Flügel 18 in ihren Ausnehmungen 16 festgehalten sind. Dieses Einhaken geschieht, wenn durch Temperaturerhöhung über einen vorgegebenen Wert die Bimetallfeder 22 sich verformt. Dadurch pumpt die Flügelzellenpumpe nicht mehr und ein Temperaturanstieg wird verhindert.As in Fig. 2 shown, the end portion 24 has hooked into the blocking recess 26 so that the wings 18 are held in their recesses 16. This hooking occurs when the bimetallic spring 22 is deformed due to an increase in temperature above a predetermined value. As a result, the vane pump no longer pumps and a rise in temperature is prevented.

In den Figuren 3 und 4 ist die Rückseite der Flügel 18 gezeigt, mit der Anbringung der blattförmigen Bimetallfeder 22. Die aus Kunststoff bestehenden Flügel 18 weisen an der Rückseite beabstandete Rippen 36 auf. In den Abschnitten zwischen den Rippen 36 ist annähernd mittig das obere Ende der Bimetallfeder 22 angenietet. Sie erstreckt sich mit ihrem unteren Abschnitt durch eine Ausnehmung an der Rückseite der Flügel 18 (siehe insbesondere Fig. 4).In the Figures 3 and 4 the rear side of the wings 18 is shown, with the attachment of the leaf-shaped bimetallic spring 22. The plastic wings 18 have spaced-apart ribs 36 on the rear side. In the sections between the ribs 36, the upper end of the bimetal spring 22 is riveted approximately in the middle. It extends with its lower section through a recess on the back of the wings 18 (see in particular Fig. 4 ).

Soweit bei der Darstellung in Fig. 5 gleiche Teile wie bei der Ausformungsform nach den Figuren 1 und 2 verwendet werden, werden die gleichen Bezugszeichen eingesetzt. Flügel 18a, die in den radialen Ausnehmungen 16 beweglich sind, unterscheiden sich von den Flügeln 18 dadurch, dass annähernd mittig nahe ihrem oberen Ende eine Tasche 40 geformt ist, die mit einem Dehnstoff 42 gefüllt ist. Die Tasche wird von einem elastisch verformbaren Deckel 44 verschlossen.As far as the representation in Fig. 5 same parts as in the molding according to the Figures 1 and 2 are used, the same reference numerals are used. Wings 18 a, which are movable in the radial recesses 16, differ from the wings 18 in that a pocket 40 is formed approximately in the center near their upper end and is filled with an expansion material 42. The pocket is closed by an elastically deformable cover 44.

Ab einer vorgegebenen Temperatur dehnt sich der Dehnstoff 42 aus, wodurch die Flügel in den Ausnehmungen 16 festgeklemmt werden. Dadurch pumpt die Pumpe nicht mehr, sodass ein Temperaturanstieg verhindert wird.Above a predetermined temperature, the expansion material 42 expands, as a result of which the wings are clamped in the recesses 16. As a result, the pump no longer pumps, so that a rise in temperature is prevented.

Lediglich der Vollständigkeit halber sei darauf hingewiesen, dass mit Hilfe von Dehnstoff auch ein Sperrelement, wie der Haken 24 einer Bimetallfeder betätigt werden kann, der bei Ausdehnung des Dehnstoffs dann mit einer Ausnehmung, wie etwa der Ausnehmung 26 in den Fig. 1 und 2, zusammenwirkt.Merely for the sake of completeness, it should be pointed out that with the aid of expansion material, a locking element, such as the hook 24 of a bimetallic spring, can be actuated which, when the expansion material expands, is then provided with a recess, such as the recess 26 in the Fig. 1 and 2 , cooperates.

Claims (7)

  1. A vane pump or compressor, with a housing (10) in which a rotor (14) is rotatably mounted about an axis of rotation, vanes (18, 18a) displaceably arranged in radial cavities (16) of the rotor (14), the ends of which vanes opposite from the bottom of the cavity (16) interact with the wall of a cylindrical space in the housing (10) under the influence of centrifugal force, wherein the axis of rotation is eccentric with the axis of the cylindrical space and the cylindrical space has a suction and a pressure channel (30, 32), wherein at least one braking or blocking element is arranged in the vanes (18, 18a) or in the wall of the cavities (16), which element is movable between a blocking or braking position in which it interacts in a positive-locking or non-positive manner with the wall of the cavity (16) or the vanes (18, 18a) and a releasing position in which the vanes (18, 18a) can move freely in the cavity (16), characterized in that the braking or blocking element can be brought into the braking or blocking position from a predetermined temperature through thermal expansion of the element or of an additional expansion member.
  2. The vane pump according to claim 1, characterized in that a bimetallic spring (22) is arranged in a fixed manner in a cavity of the vanes (18) or the wall of the cavities (16) such that, from a predetermined temperature in the cylindrical space or in the rotor (14), an end section (24) of the bimetallic spring (22) projects laterally out of the vanes (18) or the wall and engages in a blocking or braking manner with the wall or the vanes (18), respectively.
  3. The vane pump according to claim 2, characterized in that a blocking recess (26) is formed in the wall of the cavity or laterally in the vanes (18), into which recess the end section (24) engages in the blocking position.
  4. The vane pump according to claim 1, characterized in that a braking element laterally seals a pouch (40) in the vanes (18a) or in the wall of the cavities (16) which is filled with expandable material (42).
  5. The vane pump according to claim 4, characterized in that the braking element is an elastically deformable, convexly extendable cover (44).
  6. The vane pump according to claim 5, characterized in that the cover (44) is welded into the vanes (18a) or the wall.
  7. The vane pump according to claim 1, characterized in that the braking element is a piston that closes a cylinder filled with expandable material.
EP18725458.6A 2017-05-23 2018-05-14 Vane pump or compressor Active EP3631169B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202017103110.1U DE202017103110U1 (en) 2017-05-23 2017-05-23 Vane pump or compressor
PCT/EP2018/062378 WO2018215230A1 (en) 2017-05-23 2018-05-14 Vane pump or compressor

Publications (2)

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EP3631169A1 EP3631169A1 (en) 2020-04-08
EP3631169B1 true EP3631169B1 (en) 2021-03-17

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Application Number Title Priority Date Filing Date
EP18725458.6A Active EP3631169B1 (en) 2017-05-23 2018-05-14 Vane pump or compressor

Country Status (4)

Country Link
EP (1) EP3631169B1 (en)
DE (1) DE202017103110U1 (en)
ES (1) ES2876937T3 (en)
WO (1) WO2018215230A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109826789A (en) * 2019-02-21 2019-05-31 徐顺利 A kind of energy conservation adjustable vane pump

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1451879A1 (en) * 1964-12-10 1969-07-10 Zuendapp Werke Gmbh Sealing strip for rotary piston engines
US4472119A (en) * 1983-06-30 1984-09-18 Borg-Warner Corporation Capacity control for rotary compressor
DE19651413C1 (en) * 1996-12-11 1998-06-25 Peter Dipl Ing Geus Vane compressor for hot gas
JP5289433B2 (en) * 2008-05-19 2013-09-11 パナソニック株式会社 Two-stage rotary expander, expander-integrated compressor, and refrigeration cycle apparatus
JP5438587B2 (en) * 2010-04-16 2014-03-12 株式会社山田製作所 Impeller in water pump
CN102817834A (en) * 2012-08-22 2012-12-12 浙江台州先顶液压有限公司 Hydraulic vane pump
DE202013000976U1 (en) * 2013-02-01 2014-05-08 Saeta Gmbh & Co. Kg Wing for a vane device and vane device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3631169A1 (en) 2020-04-08
WO2018215230A1 (en) 2018-11-29
DE202017103110U1 (en) 2018-08-24
ES2876937T3 (en) 2021-11-15

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