EP1812712B1 - Variable delivery vane oil pump - Google Patents

Variable delivery vane oil pump Download PDF

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Publication number
EP1812712B1
EP1812712B1 EP05806369.4A EP05806369A EP1812712B1 EP 1812712 B1 EP1812712 B1 EP 1812712B1 EP 05806369 A EP05806369 A EP 05806369A EP 1812712 B1 EP1812712 B1 EP 1812712B1
Authority
EP
European Patent Office
Prior art keywords
rotor
stator
oil pump
vane
axis
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
EP05806369.4A
Other languages
German (de)
French (fr)
Other versions
EP1812712A1 (en
Inventor
Ennio Ascari
Lorenzo Campani
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.)
Omp - Officine Mazzocco Pagnoni Srl
Original Assignee
Omp - Officine Mazzocco Pagnoni Srl
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Publication of EP1812712A1 publication Critical patent/EP1812712A1/en
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Publication of EP1812712B1 publication Critical patent/EP1812712B1/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
    • 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
    • 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
    • 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
    • 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
    • F04C2/348—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 positively engaging, with circumferential play, an outer rotatable member
    • 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

Definitions

  • the present innovation relates to a variable delivery vane oil pump.
  • variable delivery vane oil pump of the type comprising a rotor, which is mounted to turn about its longitudinal axis, and presents a plurality of outwardly radially open grooves; a stator, which extends about the rotor, and is eccentrically mounted with respect to the rotor itself; a plurality of vanes, each of which is slidingly mounted inside a respective groove, and presents an outer edge arranged essentially in contact with the stator; and adjusting means for selectively controlling the eccentricity between the rotor and the stator and, therefore, the delivery of the pump.
  • variable delivery vane oil pumps of the type described above present some drawbacks mainly deriving from the fact of presenting a relatively high sliding friction between the vanes and the stator.
  • variable delivery oil pumps having elements radially interposed between the outer edges of the vanes and the stator.
  • variable delivery vane oil pump as claimed in the attached claims.
  • variable delivery vane pump for feeding oil to a lubrication circuit (not shown) of an internal combustion engine (not shown) of a vehicle (not shown).
  • the pump 1 comprises a supporting case 2, which has an essentially parallelepiped rectangular section, and comprises, in turn, a first plate 3 laterally limited by an essentially flat surface 4.
  • the plate 3 is provided with a cavity 5, which presents a longitudinal axis 6 orthogonal to the surface 4, opens outwardly at the surface 4, and is axially closed by a second plate 7 arranged in contact with the surface 4 itself.
  • the pump 1 further comprises a power shaft 8, which is mounted through the plates 3 and 7 to turn about the axis 6, and carries a keyed cylindrical rotor 9, which is housed inside the cavity 5, and presents a width, measured parallelly to the axis 6, essentially equal to the width of the cavity 5, also measured parallelly to the axis 6.
  • the cavity 5 further houses inside a stator 10, which extends about the rotor 9, presents a width, measured parallelly to the axis 6, essentially equal to the width of the cavity 5 also measured parallelly to the axis 6, and is internally limited by an essentially cylindrical surface 11 arranged in eccentric position with respect to the rotor 9.
  • the stator 10 is hinged to the plate 3 to oscillate, with respect to the plate 3 itself and under the control of an adjusting device 12 of a known type, about a fulcrum axis 13 parallel to the axis 6 and therefore allowing to selectively control the eccentricity between the rotor 9 and the surface 11.
  • the rotor 9 presents two cylindrical reciprocally opposite cavities 14, which are obtained coaxially to the axis 6, and one facing the plate 3 and the other the plate 7, and is provided with a plurality of radial grooves 15 (in the case shown, six grooves 15), which are obtained through the rotor 9 parallelly to the axis 6, are uniformly distributed about the axis 6, radially outwardly open at an outer surface 16 of the rotor 9 coaxially to the axis 6, and further open axially outwardly at the cavities 14.
  • Each groove 15 is slidingly engaged by a vane 17 presenting an outer edge 18, which extends parallelly to the axis 6, and is arranged essentially in contact with the surface 11 of the stator 10 by arranging an annular sliding element 19 in between.
  • the annular sliding element 19 presents a width, measured parallelly to the axis 6, essentially equal to the width of a vane 17 also measured parallel to the axis 6, and circumferentially coupled both to the stator 10, and to the vanes 17.
  • Each vane 17 axially projects from the respective groove 15 inside the cavities 14, and presents an inner edge 20, which extends parallel to the axis 6, and is essentially arranged in contact with two annular elements 21, each of which is accommodated inside one of the cavities 14, extends about the shaft 8, and presents a diameter larger than the diameter of the shaft 8 and smaller than the diameter of the respective cavity 14 so as to float inside the respective cavity 14 itself.
  • Each pair of respectively adjacent vanes 17 circumferentially defines a respective pumping chamber 22, which is further limited radially by the rotor 9 and by the annular sliding element 19 and axially by the plates 3 and 7, is shifted by the rotor 9 about the axis 6 and through a suction inlet 23 and a delivery outlet 24 of the oil, and presents, following the rotation of the rotor 9 about the axis 6 and the eccentricity between the rotor 9 and the surface 11 of the stator 10, a variable volume.
  • each vane 17 comprises a plurality of foils 25 (in the case shown, four foils 25), which are reciprocally overlapped, and are slidingly radially coupled one to the other to ensure a relatively efficient fluidtight coupling between the vane 17 and the annular sliding element 19.
  • the annular sliding element 19 is housed inside a respective cavity, which are obtained in the stator 10, and opens outwardly at the surface 11, and projects outwardly from the respective cavity to arrange itself in contact with the respective vanes 17.

Landscapes

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

Description

    TECHNICAL FIELD
  • The present innovation relates to a variable delivery vane oil pump.
  • In particular, the present innovation relates to a variable delivery vane oil pump of the type comprising a rotor, which is mounted to turn about its longitudinal axis, and presents a plurality of outwardly radially open grooves; a stator, which extends about the rotor, and is eccentrically mounted with respect to the rotor itself; a plurality of vanes, each of which is slidingly mounted inside a respective groove, and presents an outer edge arranged essentially in contact with the stator; and adjusting means for selectively controlling the eccentricity between the rotor and the stator and, therefore, the delivery of the pump.
    • BACKGROUND ART
  • The known variable delivery vane oil pumps of the type described above present some drawbacks mainly deriving from the fact of presenting a relatively high sliding friction between the vanes and the stator.
  • US 3153384 , US 3111905 and US 3143079 disclose variable delivery oil pumps having elements radially interposed between the outer edges of the vanes and the stator.
    • DISCLOSURE OF INVENTION
  • It is the object of the present innovation to provide a variable delivery vane oil pump, which is free from the aforementioned drawbacks.
  • According to the present innovation, there is provided a variable delivery vane oil pump, as claimed in the attached claims.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present innovation will now be described with reference to the accompanying drawings illustrating a non-limitative embodiment example thereof, in which:
    • figure 1 is a schematic longitudinal section of a preferred embodiment of the vane pump of this innovation;
    • figure 2 is a section taken along line II-II in figure 1; and
    • figure 3 is a section taken along line III-III in figure 1.
    BEST MODE FOR CARRYING OUT THE INVENTION
  • With reference to figures from 1 to 3, it is indicated as a whole by 1, a variable delivery vane pump, for feeding oil to a lubrication circuit (not shown) of an internal combustion engine (not shown) of a vehicle (not shown).
  • The pump 1 comprises a supporting case 2, which has an essentially parallelepiped rectangular section, and comprises, in turn, a first plate 3 laterally limited by an essentially flat surface 4. The plate 3 is provided with a cavity 5, which presents a longitudinal axis 6 orthogonal to the surface 4, opens outwardly at the surface 4, and is axially closed by a second plate 7 arranged in contact with the surface 4 itself.
  • The pump 1 further comprises a power shaft 8, which is mounted through the plates 3 and 7 to turn about the axis 6, and carries a keyed cylindrical rotor 9, which is housed inside the cavity 5, and presents a width, measured parallelly to the axis 6, essentially equal to the width of the cavity 5, also measured parallelly to the axis 6.
  • The cavity 5 further houses inside a stator 10, which extends about the rotor 9, presents a width, measured parallelly to the axis 6, essentially equal to the width of the cavity 5 also measured parallelly to the axis 6, and is internally limited by an essentially cylindrical surface 11 arranged in eccentric position with respect to the rotor 9.
  • The stator 10 is hinged to the plate 3 to oscillate, with respect to the plate 3 itself and under the control of an adjusting device 12 of a known type, about a fulcrum axis 13 parallel to the axis 6 and therefore allowing to selectively control the eccentricity between the rotor 9 and the surface 11.
  • The rotor 9 presents two cylindrical reciprocally opposite cavities 14, which are obtained coaxially to the axis 6, and one facing the plate 3 and the other the plate 7, and is provided with a plurality of radial grooves 15 (in the case shown, six grooves 15), which are obtained through the rotor 9 parallelly to the axis 6, are uniformly distributed about the axis 6, radially outwardly open at an outer surface 16 of the rotor 9 coaxially to the axis 6, and further open axially outwardly at the cavities 14.
  • Each groove 15 is slidingly engaged by a vane 17 presenting an outer edge 18, which extends parallelly to the axis 6, and is arranged essentially in contact with the surface 11 of the stator 10 by arranging an annular sliding element 19 in between.
  • The annular sliding element 19 presents a width, measured parallelly to the axis 6, essentially equal to the width of a vane 17 also measured parallel to the axis 6, and circumferentially coupled both to the stator 10, and to the vanes 17.
  • Each vane 17 axially projects from the respective groove 15 inside the cavities 14, and presents an inner edge 20, which extends parallel to the axis 6, and is essentially arranged in contact with two annular elements 21, each of which is accommodated inside one of the cavities 14, extends about the shaft 8, and presents a diameter larger than the diameter of the shaft 8 and smaller than the diameter of the respective cavity 14 so as to float inside the respective cavity 14 itself.
  • Each pair of respectively adjacent vanes 17 circumferentially defines a respective pumping chamber 22, which is further limited radially by the rotor 9 and by the annular sliding element 19 and axially by the plates 3 and 7, is shifted by the rotor 9 about the axis 6 and through a suction inlet 23 and a delivery outlet 24 of the oil, and presents, following the rotation of the rotor 9 about the axis 6 and the eccentricity between the rotor 9 and the surface 11 of the stator 10, a variable volume.
  • Furthermore, with regard to this, it is important to state that the volume of each chamber 22 at the inlet 23 and the outlet 24 and, therefore, the delivery of the pump 1 are selectively controlled by shifting the stator 10 about the axis 13 and, therefore, modifying the eccentricity between the rotor 9 and the surface 11 of the stator 10 itself.
  • As shown in figure 2, each vane 17 comprises a plurality of foils 25 (in the case shown, four foils 25), which are reciprocally overlapped, and are slidingly radially coupled one to the other to ensure a relatively efficient fluidtight coupling between the vane 17 and the annular sliding element 19.
  • According to a variation not shown, the annular sliding element 19 is housed inside a respective cavity, which are obtained in the stator 10, and opens outwardly at the surface 11, and projects outwardly from the respective cavity to arrange itself in contact with the respective vanes 17.
  • The operation of the pump 1 is easily inferred from the above description and does not require any further explanations.

Claims (2)

  1. A variable delivery vane oil pump, the pump comprising a rotor (9), which is mounted to turn about a determined longitudinal axis (6), thereof, and presents a plurality of grooves (15) outwardly radially open at one surface (16) thereof essentially coaxial to said axis (6); a stator (10), which extends about the rotor (9), and is eccentrically mounted with respect to the rotor (9) itself; a plurality of vanes (17), each of which is slidingly mounted inside one respective said groove (15), and presents an outer edge (18) facing the stator (10); and adjusting means (12) for selectively controlling the eccentricity between the rotor (9) and the stator (10); and whereby the vane oil pump comprises a single annular sliding element (19) arranged between the stator (10) and the outer edges (18) of the vanes (17) and slidingly circumferentially coupled to the stator (10) and to the vanes (17);
    the vane oil pump being characterised by two annular elements (21) arranged on opposite bands of the rotor (9) parallel to and extending about said longitudinal axis (6); each vane (17) axially projecting from said respective groove (15) and presenting an inner edge (20) arranged in contact with said annular elements (21).
  2. An oil pump according to claim 1, in which each vane (17) comprises at least two foils (25) reciprocally overlapping and slidingly coupled one to the other.
EP05806369.4A 2004-11-19 2005-11-18 Variable delivery vane oil pump Active EP1812712B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000088U ITBO20040088U1 (en) 2004-11-19 2004-11-19 OIL PUMP WITH VARIABLE FLOW PALLETS
PCT/IB2005/003452 WO2006054158A1 (en) 2004-11-19 2005-11-18 Variable delivery vane oil pump

Publications (2)

Publication Number Publication Date
EP1812712A1 EP1812712A1 (en) 2007-08-01
EP1812712B1 true EP1812712B1 (en) 2018-01-10

Family

ID=36061710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05806369.4A Active EP1812712B1 (en) 2004-11-19 2005-11-18 Variable delivery vane oil pump

Country Status (6)

Country Link
US (1) US20090155113A1 (en)
EP (1) EP1812712B1 (en)
JP (1) JP2008520897A (en)
CN (1) CN101087959B (en)
IT (1) ITBO20040088U1 (en)
WO (1) WO2006054158A1 (en)

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
ITBO20040715A1 (en) * 2004-11-19 2005-02-19 H P E High Performance Enginee VARIABLE FLOW PUMP PUMP, IN PARTICULAR FOR OIL
DE102007007293A1 (en) * 2007-02-14 2008-08-21 Zf Lenksysteme Gmbh Adjustable positive-displacement pump for servo steering system of motor vehicle, has inserting unit inserted at inner surface of curve ring and designed such that sliding friction between rotor units and contact surface is reduced
US8182248B2 (en) * 2007-11-29 2012-05-22 Hamilton Sundstrand Corporation Vane pump with tilting pad radial bearings
CN102678545B (en) * 2012-05-28 2015-04-22 山西斯普瑞机械制造股份有限公司 High-pressure anti-friction column pin type vane pump
CN103114993B (en) * 2012-12-05 2015-11-18 胡凯 A kind of step blade type hydraulic machinery

Citations (1)

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Publication number Priority date Publication date Assignee Title
US3143079A (en) * 1961-08-07 1964-08-04 James F Carner Reversible discharge flow and variable displacement pump

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Also Published As

Publication number Publication date
ITBO20040088U1 (en) 2005-02-19
WO2006054158A8 (en) 2006-08-10
WO2006054158A1 (en) 2006-05-26
CN101087959B (en) 2010-05-26
US20090155113A1 (en) 2009-06-18
CN101087959A (en) 2007-12-12
EP1812712A1 (en) 2007-08-01
JP2008520897A (en) 2008-06-19

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