EP1485576B1 - Pompe rotative a palettes centrales a distribution variable, notamment adaptee a de l'huile - Google Patents

Pompe rotative a palettes centrales a distribution variable, notamment adaptee a de l'huile Download PDF

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Publication number
EP1485576B1
EP1485576B1 EP03739640A EP03739640A EP1485576B1 EP 1485576 B1 EP1485576 B1 EP 1485576B1 EP 03739640 A EP03739640 A EP 03739640A EP 03739640 A EP03739640 A EP 03739640A EP 1485576 B1 EP1485576 B1 EP 1485576B1
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EP
European Patent Office
Prior art keywords
rotor
vanes
rotary pump
shaft
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03739640A
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German (de)
English (en)
Other versions
EP1485576A1 (fr
Inventor
Carlo Pachetti
Giacomo Armenio
Daniele Righetti
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.)
Pierburg Pump Technology Italy SpA
Original Assignee
Pierburg SpA
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Filing date
Publication date
Application filed by Pierburg SpA filed Critical Pierburg SpA
Publication of EP1485576A1 publication Critical patent/EP1485576A1/fr
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Publication of EP1485576B1 publication Critical patent/EP1485576B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04C14/226—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 by pivoting the cam around an eccentric axis
    • 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
    • F04C2/352—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 vanes being pivoted on the axis of the outer member

Definitions

  • the present invention relates to a variable-delivery vane pump as specified in the preamble of Claim 1.
  • a pump is known e.g. from WO 91/15661.
  • the present invention relates to a rotary vane pump of the type comprising a casing; an adjustable stator; and a rotation unit in turn comprising a rotor and a number of vanes.
  • variable-delivery vane pump as claimed in Claim 1.
  • Rotary pump 10 comprises a casing 11, in which is defined a cavity 12 having a substantially semicircular-section portion 12a and a supporting surface 12b for the reasons explained in detail later on.
  • Cavity 12 also comprises a seat 12c for housing a spring device 13 used as described later on.
  • Cavity 12 also houses an adjustable oscillating stator 14 having a substantially annular section.
  • stator 14 comprises a substantially semicircular-section portion 14a, which mates perfectly with portion 12a of cavity 12 to allow stator 14 to rotate about an axis perpendicular to the Figure 1 plane and through a center C1:
  • Stator 14 also comprises a first shoulder 14b, which rests on supporting surface 12b in cavity 12, and a second shoulder 14c resting on spring device 13.
  • a circular cavity 15 housing a rotor 16 is defined inside stator 14.
  • the outer surface 16a of rotor 16 and surface 15a of circular cavity 15 define a pumping space 17.
  • rotor 16 is rotated by a drive shaft 18 driven by drive means not shown, and which rotates about an axis 19 (center C2 in Figure 1).
  • rotor 16 comprises a number of - in the embodiment shown, five - radial openings 16b.
  • a respective vane 20 extends radially from a shaft 21 of axis 22 (center C3 in Figure 1). And, since shaft 21 is integral with stator 14, center C3 is also the center of stator 14.
  • Rotor 16 has an inner cavity 16c at least partly housing vanes 20 and shaft 21 to which vanes 20 are hinged. As will be seen, cavity 16c permits movement of shaft 21 to vary eccentricity (EC) (see below) alongside a variation in delivery pressure.
  • EC eccentricity
  • one end of shaft 21 is housed inside a cavity 14d in stator 14, and is fixed to stator 14 by conventional means not shown.
  • each vane 20 has an enlargement 20a for preventing the oil under pressure from flowing through radial opening 16b into cavity 16c, and which simply slides with respect to the walls of corresponding radial opening 16b.
  • Enlargement 20a is so shaped as to ensure rotor 16 rotates vane 20 over the full eccentricity (EC) range.
  • each vane 20 is hinged "bannerfashion" to shaft 21, and is free to rotate with respect to shaft 21 and, therefore, to axis 22 (center C3 in Figure 1).
  • Pumping space 17 is divided into five pumping pockets 23, each defined by two adjacent vanes 20.
  • vanes 20 Rotation of vanes 20 with respect to shaft 21, fixed to and integral with stator 14, is obviously permitted by vanes 20, as stated, being hinged "bannerfashion" to shaft 21. As shown in Figures 2 and 3, the hinges of vanes 20 are intercalated to occupy the whole usable longitudinal portion of shaft 21.
  • Figure 1 shows a suction opening 24 and a delivery opening 25.
  • axis 19 of rotor 16 (center C2 in Figure 1) and axis 22 of stator 14 and shaft 21 (center C3 in Figure 1) are offset by eccentricity EC, which, when increased or decreased by known means by moving stator 14 and shaft 21 integral with it, increases or decreases the delivery of pump 10 respectively.
  • a chamber 26 ( Figure 1) is provided between casing 11 and stator 14, and into which part of the oil delivery, i.e. from delivery opening 25, is fed.
  • chamber 26 contains a certain amount of fluid, in particular oil, of the same pressure as the oil from delivery opening 25.
  • Figures 2 and 3 also show a cover 27 for closing most of the members described above inside casing 11.
  • rotary pump 10 supplies a delivery ranging between zero (when centers C2 and C3 coincide), and a maximum value when rotor 16 almost rests on surface 15a.
  • Oil delivery is obviously maximum when the eccentricity (EC) of stator 14 with respect to rotor 16 is maximum.
  • variable-delivery rotary vane pump substantially lie in eliminating wear of the vane tips, by eliminating any slide between the vanes and the inner surface of the stator, even at high rotor speed.
  • leakage between adjacent pumping pockets is practically negligible, thus ensuring acceptable efficiency of the pump.
  • the oscillating stator 14 has a circular surface portion 14a which mates perfectly with a corresponding portion 12a of inner cavity 12 of casing 11, with no need for intermediate members, such as pins or articulated joints, so that stator 14 is easier to fit to casing 11.

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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)

Claims (7)

  1. Pompe rotative à débit variable (10) avec des aubes centrales (20), comprenant un corps (11) logeant un stator réglable (14), un rotor (16) et un nombre d'aubes (20) tournées par ledit rotor (16) et définissant un nombre correspondant de poches de pompage (23) ; dans laquelle ledit nombre d'aubes (20) est articulé à un arbre (21) intégré audit stator réglable (14) ; chaque aube (20) étant insérée à l'intérieur d'une ouverture radiale respective (16b) dans ledit rotor (16), afin que la rotation dudit rotor (16) fasse tourner ladite aube (20) ; la pompe rotative étant caractérisée en ce qu'au niveau de l'ouverture radiale respective (16b) dans ledit rotor (16), chaque aube (20) comprend un élargissement (20a) profilé pour empêcher de l'huile sous pression dans ladite ouverture radiale (16b) de s'écouler dans ladite cavité (16c) sur la totalité de la plage d'excentricité (EC).
  2. Pompe rotative (10) selon la revendication 1, dans laquelle ledit élargissement (20a) est profilé pour assurer également la rotation de ladite aube (20) par ledit rotor (16) sur la totalité de la plage d'excentricité (EC).
  3. Pompe rotative (10) selon la revendication 1, dans laquelle ledit rotor (16) comprend une cavité (16c) logeant au moins partiellement les aubes (20) et ledit arbre (21) ; ladite cavité (16c) permettant au mouvement dudit arbre (21) de faire varier l'excentricité (EC) corrélativement à la variation de la pression de refoulement.
  4. Pompe rotative (10) selon la revendication 1, dans laquelle les charnières desdites aubes (20) sont fixées audit arbre (21) et intercalées les unes avec les autres.
  5. Pompe rotative (10) selon l'une quelconque des revendications précédentes, dans laquelle, entre les extrémités desdites aubes (20) et la surface (15a) d'une autre cavité (15) logeant ledit rotor (16), un dégagement est prévu pour empêcher le coulissement entre les deux surfaces pendant la rotation dudit rotor (16) ; des fuites entre chaque poche de pompage (23) et celles adjacentes étant également réduites dans le même temps.
  6. Pompe rotative (10) selon la revendication 1, dans laquelle l'arbre (21) auquel les aubes (20) sont articulées, est fixé au stator réglable (14) et sont ainsi mobiles avec lui pendant le réglage automatique de l'excentricité (EC) par la pression de refoulement.
  7. Pompe rotative (10) selon l'une quelconque des revendications précédentes, dans laquelle, le stator réglable (14) comprend une partie de surface circulaire (14a) qui s'accouple parfaitement à une partie correspondante (12a) d'une cavité intérieure (12) du corps (11) sans besoin d'éléments intermédiaires, tels que des goupilles ou des joints articulés.
EP03739640A 2002-02-15 2003-02-14 Pompe rotative a palettes centrales a distribution variable, notamment adaptee a de l'huile Expired - Lifetime EP1485576B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2002BO000076A ITBO20020076A1 (it) 2002-02-15 2002-02-15 Pompa rotativa a palette centrali a portata variabile , particolarmente per olio
ITBO20020076 2002-02-15
PCT/IT2003/000076 WO2003069127A1 (fr) 2002-02-15 2003-02-14 Pompe rotative a palettes centrales a distribution variable, notamment adaptee a de l'huile

Publications (2)

Publication Number Publication Date
EP1485576A1 EP1485576A1 (fr) 2004-12-15
EP1485576B1 true EP1485576B1 (fr) 2006-09-27

Family

ID=11439907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03739640A Expired - Lifetime EP1485576B1 (fr) 2002-02-15 2003-02-14 Pompe rotative a palettes centrales a distribution variable, notamment adaptee a de l'huile

Country Status (5)

Country Link
EP (1) EP1485576B1 (fr)
AU (1) AU2003209707A1 (fr)
DE (1) DE60308662T2 (fr)
IT (1) ITBO20020076A1 (fr)
WO (1) WO2003069127A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT502189B1 (de) 2005-07-29 2007-02-15 Miba Sinter Holding Gmbh & Co Flügelzellenpumpe
GB2470012B (en) * 2009-05-05 2016-04-27 Gm Global Tech Operations Llc Variable Displacement Vane Pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807912A (en) * 1972-09-25 1974-04-30 Keller Corp Fluid flow device having high degree of flexibility
DE3122598C1 (de) * 1981-06-06 1983-01-27 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Regelbare Fluegelzellenpumpe
US4678413A (en) * 1986-01-22 1987-07-07 Edward Ries Variable displacement vane pump or motor
IT1240629B (it) * 1990-04-11 1993-12-17 Epifanio Leanza Macchina fluidodinamica rotante a variazione di volume

Also Published As

Publication number Publication date
ITBO20020076A0 (it) 2002-02-15
AU2003209707A1 (en) 2003-09-04
DE60308662T2 (de) 2007-08-23
WO2003069127A8 (fr) 2004-04-08
ITBO20020076A1 (it) 2003-08-18
WO2003069127A1 (fr) 2003-08-21
DE60308662D1 (de) 2006-11-09
EP1485576A1 (fr) 2004-12-15

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