EP3394446B1 - Pompe à déplacement positif à palettes - Google Patents

Pompe à déplacement positif à palettes Download PDF

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Publication number
EP3394446B1
EP3394446B1 EP16810476.8A EP16810476A EP3394446B1 EP 3394446 B1 EP3394446 B1 EP 3394446B1 EP 16810476 A EP16810476 A EP 16810476A EP 3394446 B1 EP3394446 B1 EP 3394446B1
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EP
European Patent Office
Prior art keywords
gudgeon
rotor
stator
rotation
vanes
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.)
Active
Application number
EP16810476.8A
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German (de)
English (en)
Other versions
EP3394446A1 (fr
Inventor
Giancarlo Galli
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.)
VHIT SpA
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VHIT SpA
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Publication date
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Publication of EP3394446A1 publication Critical patent/EP3394446A1/fr
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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
    • 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
    • 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
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • 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

Definitions

  • the present invention relates to a variable volume positive displacement vane pump.
  • Vane pumps comprising a rotor that can rotate about an axis of rotation.
  • Such rotor comprises an impeller in which radial slots are afforded in which the vanes are inserted.
  • the pump also comprises a stator which internally defines a chamber in which the rotor can rotate about its own axis of rotation.
  • the vanes are slidable along the slots and project radially until they come into contact with the chamber of the stator.
  • the pump comprises a centring ring that abuts a radially more internal end of all the vanes.
  • a centring ring in combination with the chamber of the stator guides the radial sliding of the vanes along the slot.
  • the centring ring limits the radial return of the vanes into the slots.
  • the centring ring may be drawn in rotation by the vanes together with the rotor.
  • the variation of the pump volume determines the movement of the stator with respect to the axis of rotation of the rotor. This is also associated with a movement of the centring ring.
  • the technical task underpinning the present invention is to propose a pump which enables obviating the drawbacks described above.
  • an object of the present invention is to propose a pump that allows the wear and noise to be reduced.
  • a further object of the present invention is also to improve performance.
  • the stated technical task and specified objects are substantially achieved by a pump comprising the technical features disclosed in one or more of the appended claims.
  • reference number 1 indicates a variable volume positive displacement vane pump.
  • the pump 1 comprises a rotor 2.
  • the rotor 2 can rotate about an axis 20 of rotation.
  • the rotor 2 comprises a plurality of vanes 23.
  • the rotor 2 comprises slots 22 for at least partially housing the vanes 23.
  • the slots 22 cross the rotor 2 along a parallel direction to that of the axis of rotation.
  • the slots 22 therefore have an axial through arrangement along the rotor 2.
  • the slots 22 appropriately have a spoke arrangement.
  • Appropriately also such slots 22 extend radially.
  • the pump 1 comprises a shaft 3 for activating the rotor 2.
  • the rotor 2 and the shaft 3 may be two distinct assembled elements, or a single piece.
  • the rotor 2 may surround the shaft 3 at least for a predetermined axial length.
  • the pump 1 further comprises a stator 4.
  • the relative position between the stator 4 and the axis 20 of rotation of the rotor 2 is adjustable to allow a variation of the volume of the pump 1.
  • the stator 4 is movable while the axis 20 of rotation of the rotor 2 is kept stationary.
  • stator 4 can translate with respect to the axis 20 of rotation to change the volume of the pump 1.
  • stator 4 can rotate to change the volume (see figures 6a-6b in which 46 indicates a joint zone that allows a rotation).
  • the pump 1 comprises a regulation means 400 for regulating the volume which may comprise:
  • the stator 4 internally defines a chamber 40 in which the rotor 2 can rotate about its own axis 20 of rotation.
  • such chamber 40 comprises a lateral surface which is substantially cylindrical, but which could also be shaped like the lateral surface of a prism with an oval or elliptical base.
  • the pump 1 comprises a centring means 5 for centring the vanes.
  • the centring means 5 contributes to the correct positioning of the vanes 23 in an operating zone.
  • the centring means 5 is a means that contrasts the return of the vanes into the slots 22.
  • the centring means 5 comprises a first gudgeon 41 solidly constrained to the stator 4.
  • the first gudgeon 41 is therefore not drawn in rotation by the rotor 2.
  • the movement of the stator 4 with respect to the axis 20 of rotation takes place in unison with the first gudgeon 41.
  • the first gudgeon 41 projects in a cantilever fashion appropriately within the rotor 2.
  • it could project in a cantilever fashion towards the shaft 3.
  • the first gudgeon 41 extends axially along a different length (in particular shorter) with respect to the height of the chamber 40 (i.e. at the extension of the chamber 40 along the axis 20 of rotation of the rotor 2).
  • the chamber 40 has a length, measured along the direction of the axis 20 of rotation, which is constant and predetermined. It is specified that in this document the expression "direction of the axis 20 of rotation” means a parallel direction to that of the axis 20 of rotation. In the preferred embodiment the first gudgeon 41 extends along the direction of the axis 20 of rotation for a different length 30 with respect to said predetermined length of the chamber 40.
  • the stator 4 comprises a wall 45 which surrounds the axis 20 of rotation and which contributes to delimiting the chamber 40.
  • the wall 45 surrounds the chamber 40.
  • the wall 45 is curved, preferably cylindrical, but it could, for example, be oval shaped.
  • the first gudgeon 41 has a through hole 410 for the passage of the shaft 3.
  • the first gudgeon 41 is coaxial with the wall 45.
  • the centring means 5 comprises a swivel ring 24 that can rotate and that is radially interposed between the first gudgeon 41 and the vanes 23.
  • the vanes 23 comprise a radially more internal side 231 and a radially more external side 232.
  • each vane 23 extends like a parallelepiped.
  • the radially more internal sides 231 of a plurality of said vanes 23 may be in contact with said first gudgeon 41 directly or through the interposition of the swivel ring 24 which surrounds said first gudgeon 41.
  • Figures 3 and 4 show a solution in which the first gudgeon 41 is placed in direct contact with the more radially internal sides 231 of the vanes.
  • Figures 1 and 2 show a solution in which between the first gudgeon 41 and the more radially internal sides 231 of the vanes 23 said swivel ring 24 is interposed.
  • the purpose of the swivel ring 24 is to optimise the friction between the vanes 23 and the first gudgeon 41.
  • the swivel ring 24 is annular. It may surround the first gudgeon 41 for the entire length of the first gudgeon 41.
  • the axial length of the swivel ring 24 may be shorter or however different with respect to the axial length of the first gudgeon 41.
  • the centring means 5 may also comprise a ring 50 for centring the vanes.
  • the rotor 2 would therefore be at least partially interposed (axially) between the first gudgeon 41 and the centring ring 50.
  • the first gudgeon 41 and the centring ring 50 would therefore be located on two opposite sides of said rotor 2.
  • the combination of the first gudgeon 41 and the centring ring 50 allows the vanes 23 to be guided at two opposite ends of the radially most internal side 231 of the vanes 23.
  • the stator 4 comprises a structure 43 that delimits at least partially the chamber 40 completely surrounding at least a portion of the rotor 2.
  • the structure 43 integrates (possibly coincide with) said wall 45.
  • the first gudgeon 41 is solidly constrained to the structure 43. In particular it is connected to the structure 43. This could take place through an unremovable connection, for example the first gudgeon 41 and the structure 43 could be a single monolithic body (see figures 10b, 11b, 12b ) or however constrained together, for example, by interference.
  • first gudgeon 41 could be afforded in a bridge 44 that connects two distinct edges of the structure 43 (preferably the two distinct edges are diametrically opposite with respect to the chamber 40).
  • the bridge 44 and the first gudgeon 41 are therefore a monolithic body with the structure 43.
  • the bridge 44 appropriately contributes to delimiting the chamber 40.
  • connection of the first gudgeon 41 with the structure 43 could be removable (see for example figures 8a-8c and 9a-9c better described below).
  • the first gudgeon 41 could be afforded in a bridge 44 (see in particular the exemplary figures 8a and 9a ) that connects the two distinct edges of the structure 43.
  • a bridge 44 that connects the two distinct edges of the structure 43.
  • these two distinct edges are located in diametrically opposite positions (with respect to the chamber 40) of the structure 43.
  • the bridge 44 could be detachable with respect to the structure 43.
  • the bridge 44 could be constrained by means of threaded elements (see figures 8a-8c ) or by pressure.
  • the bridge 44 could be inserted at least in part in specific seats 440 afforded in the structure 43 able to lock at least in part the degrees of freedom of said bridge 44 (see figures 9a-9c ).
  • the first gudgeon 41 could be afforded in a single monolithic body with remaining parts of the bridge 44 or be assembled thereto.
  • the centring means 5 for centring the vanes 23 comprises a second gudgeon 42 solidly constrained to the structure 43 (see for example figures 15b , 16b , 17b ).
  • the second gudgeon 42 projects in a cantilever fashion in the opposite direction with respect to the first gudgeon 41.
  • the second gudgeon 42 projects advantageously towards the inside of the rotor 2 or however towards the shaft 3.
  • the second gudgeon 42 is therefore not drawn in rotation by the rotor 2.
  • the combination of the first and the second gudgeon 41, 42 allows the vanes 23 to be guided at two opposite ends of the radially most internal side 231 of the vanes 23. In other words, the vanes 23 could be guided by both sides of the stator 4.
  • the vanes 23 extend radially between the second gudgeon 42 and the wall 45 which: is afforded in the structure 43, surrounds at least in part said chamber 40, surrounds said axis 20 of rotation.
  • One or more of the features previously described for the first gudgeon 41 could also be repeated for the second gudgeon 42.
  • the structure 43 may possibly completely house the rotor 2 within it (see figures 1-4 ).
  • the second gudgeon 42 could possibly be integrated into a lid for closing a side of the structure 43.
  • the shaft 3 crosses the rotor 2, the first and the second gudgeon 41, 42 (see for example figure 15b ).
  • the shaft 3 may be projecting in a cantilever fashion and could cross the first gudgeon 41 without crossing the second gudgeon 42 (see for example figure 13b or 17b ).
  • the second gudgeon 42 could be a solid body free from through holes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (10)

  1. Pompe à ailettes à déplacement positif de volume variable, comprenant :
    - un rotor (2) qui peut tourner autour d'un axe (20) de rotation et qui comprend des fentes (22) pour recevoir au moins en partie des ailettes (23), lesdites fentes (22) passant à travers le rotor (2) d'une extrémité à l'autre le long d'une direction parallèle à celle de l'axe (20) de rotation ;
    - un stator (4), la position relative entre le stator (4) et l'axe (20) de rotation du rotor (2) pouvant être ajustée de manière à permettre une variation de volume de la pompe (1) ; le stator (4) ayant une chambre intérieure (40), le rotor (2) pouvant tourner autour de son propre axe (20) de rotation ; le stator (4) comprenant une paroi (45) qui entoure au moins en partie ladite chambre (40) ;
    - un moyen de centrage (5) pour centrer les ailettes, ledit moyen de centrage (5) comprenant un premier goujon (41) qui est fixé solidement au stator (4) et qui ne peut pas être entraîné en rotation par le rotor (2) ;
    le stator (4) comprenant une structure (43) qui intègre ladite paroi (45) et qui délimite au moins en partie la chambre (40), renfermant complètement au moins une portion du rotor (2) ; le premier goujon (41) étant fixé solidement à la structure (43).
  2. Pompe selon la revendication 1, caractérisée en ce qu'elle comprend un arbre d'entraînement (3) pour entraîner le rotor (2) ; le premier goujon (41) ayant un trou traversant (410) pour le passage de l'arbre (3) .
  3. Pompe selon la revendication 1 ou 2, caractérisée en ce que ladite paroi (45) de stator est circulaire, ladite paroi (45) et le premier goujon (41) étant coaxiaux.
  4. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le moyen de centrage (5) comprend une bague pivotante (24) qui est interposée radialement entre le premier goujon (41) et les ailettes (23).
  5. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le moyen de centrage (5) pour centrer les ailettes comprend un deuxième goujon (42) qui est fixé solidement à la structure (43) ; lesdites ailettes (23) s'étendant radialement entre le deuxième goujon (42) et la paroi (45) qui délimite ladite chambre (40), entourant ledit axe (20) de rotation ; ledit rotor (2) étant au moins en partie interposé entre le premier et le deuxième goujon (41, 42) .
  6. Pompe selon la revendication 5 lorsqu'elle dépend directement ou indirectement de la revendication 2, caractérisée en ce que ledit arbre (3) est fixé solidement au rotor (2) et passe à travers le rotor (2), et les premier et deuxième goujons (41, 42).
  7. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le stator (4) comprend un pont (44) qui contribue à délimiter la chambre (40) et qui relie deux bords distincts de la structure (43) ; le premier goujon (41) étant réalisé dans le pont (44) et ledit pont (44) pouvant être détaché de ladite structure (43).
  8. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le stator (4) comprend un pont (44) qui contribue à délimiter la chambre (40) et qui relie deux bords distincts de la structure (43) ; le premier goujon (41) étant réalisé dans le pont (44) et ledit pont (44) et ledit premier goujon (41) constituant un corps monolithique avec ladite structure (43).
  9. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le premier goujon (41) fait saillie en porte-à-faux dans le rotor (2).
  10. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au niveau des ailettes (23), la chambre (40) présente une longueur constante prédéterminée mesurée le long de la direction de l'axe (20) de rotation ;
    le premier goujon (41) s'étendant le long de ladite direction de l'axe (20) de rotation sur une longueur différente par rapport à ladite longueur prédéterminée de la chambre (40).
EP16810476.8A 2015-12-23 2016-11-22 Pompe à déplacement positif à palettes Active EP3394446B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2015A009158A ITUB20159158A1 (it) 2015-12-23 2015-12-23 Pompa volumetrica a palette
PCT/IB2016/057025 WO2017109606A1 (fr) 2015-12-23 2016-11-22 Pompe à déplacement positif à palettes

Publications (2)

Publication Number Publication Date
EP3394446A1 EP3394446A1 (fr) 2018-10-31
EP3394446B1 true EP3394446B1 (fr) 2021-04-21

Family

ID=55697307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16810476.8A Active EP3394446B1 (fr) 2015-12-23 2016-11-22 Pompe à déplacement positif à palettes

Country Status (3)

Country Link
EP (1) EP3394446B1 (fr)
IT (1) ITUB20159158A1 (fr)
WO (1) WO2017109606A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019063089A1 (fr) * 2017-09-29 2019-04-04 Pierburg Pump Technology Gmbh Pompe à palettes rotative à volume de transport variable

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE492322C (de) * 1930-02-21 Knorr Bremse Akt Ges Drehkolbenmaschine
DE489940C (de) * 1927-09-15 1930-01-27 Knorr Bremse Akt Ges Drehkolbenmaschine mit einer im Zylinder exzentrisch gelagerten, in radialer Richtung geteilten Kolbentrommel
DE102010000947B4 (de) * 2010-01-15 2015-09-10 Joma-Polytec Gmbh Flügelzellenpumpe
TWI557311B (zh) * 2012-04-09 2016-11-11 Yang jin huang Leaf fluid transport structure
CA2876680C (fr) * 2012-06-29 2018-02-27 Gene-Huang Yang Appareil de transmission a fluide du type a organe obturateur
DE102012213847A1 (de) * 2012-08-06 2014-02-20 Zf Friedrichshafen Ag Flügelzellenpumpe

Also Published As

Publication number Publication date
EP3394446A1 (fr) 2018-10-31
WO2017109606A1 (fr) 2017-06-29
ITUB20159158A1 (it) 2017-06-23

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