WO2006054158A1 - Variable delivery vane oil pump - Google Patents

Variable delivery vane oil pump Download PDF

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Publication number
WO2006054158A1
WO2006054158A1 PCT/IB2005/003452 IB2005003452W WO2006054158A1 WO 2006054158 A1 WO2006054158 A1 WO 2006054158A1 IB 2005003452 W IB2005003452 W IB 2005003452W WO 2006054158 A1 WO2006054158 A1 WO 2006054158A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
stator
axis
oil pump
vanes
Prior art date
Application number
PCT/IB2005/003452
Other languages
French (fr)
Other versions
WO2006054158A8 (en
Inventor
Ennio Ascari
Lorenzo Campani
Original Assignee
H.P.E. High Performance Engineering S.R.L.
Officine Mazzocco Pagnoni S.R.L.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by H.P.E. High Performance Engineering S.R.L., Officine Mazzocco Pagnoni S.R.L. filed Critical H.P.E. High Performance Engineering S.R.L.
Priority to EP05806369.4A priority Critical patent/EP1812712B1/en
Priority to JP2007542149A priority patent/JP2008520897A/en
Priority to US11/719,735 priority patent/US20090155113A1/en
Priority to CN2005800398183A priority patent/CN101087959B/en
Publication of WO2006054158A1 publication Critical patent/WO2006054158A1/en
Publication of WO2006054158A8 publication Critical patent/WO2006054158A8/en

Links

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 vane oil pump as claimed in the attached claims.
  • 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
  • figure 3 is a section taken along line III-III in figure 1.
  • 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 shoe 19 in between.
  • the shoe 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 shoe 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 shoe 19.
  • the shoe 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)

Abstract

A variable delivery vane oil pump, is provided with a stator (10) eccentrically mounted about a rotor (9), which is adapted to turn about a longitudinal axis (6) thereof, and presents a plurality of grooves (15) radially outwardly opened and slidingly engaged, each, by a respective vane (17) the vanes (17) being arranged essentially in contact with the stator (10) by interposing a single sliding annular element (19).

Description

VARIABLE DELIVERY VANE OIL PUMP
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.
DISCLOSURE QF 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 shoe 19 in between.
The shoe 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 shoe 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 shoe 19. According to a variation not shown, the shoe 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

C L A I M S
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 being characterised in that it comprises a single annular sliding element (19) arranged between the stator
(10) and the outer edges (18) of the vanes (17) .
2.- An oil pump according to claim 1, in which the sliding element (19) is slidingly circumferentially coupled to the stator (10) and to the vanes (17) .
3.- An oil pump according to claim 1 or 2, in which each vane (17) comprises at least two foils (25) reciprocally overlapping and slidingly coupled one to the other.
4.- An oil pump according to any one of the preceding claims, and further comprising two annular elements (21) , which are arranged on opposite bands of the rotor (9) parallelly to said axis (6), and extend about the axis (6) itself; each vane (17) axially projecting from said respective groove (15) and presenting an inner edge (20) arranged essentially in contact with said annular elements (21) .
5.- 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) opening outwardly 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 being characterised in that each vane (17) comprises at least two foils (25) reciprocally overlapped and slidingly coupled one to the other; a single sliding annular element (19) being arranged between the stator
(10) and the vanes (17) .
PCT/IB2005/003452 2004-11-19 2005-11-18 Variable delivery vane oil pump WO2006054158A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05806369.4A EP1812712B1 (en) 2004-11-19 2005-11-18 Variable delivery vane oil pump
JP2007542149A JP2008520897A (en) 2004-11-19 2005-11-18 Variable discharge vane type oil pump
US11/719,735 US20090155113A1 (en) 2004-11-19 2005-11-18 Variable delivery vane oil pump
CN2005800398183A CN101087959B (en) 2004-11-19 2005-11-18 Variable delivery vane pump

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
ITBO2004U000088 2004-11-19

Publications (2)

Publication Number Publication Date
WO2006054158A1 true WO2006054158A1 (en) 2006-05-26
WO2006054158A8 WO2006054158A8 (en) 2006-08-10

Family

ID=36061710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/003452 WO2006054158A1 (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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP2065561A2 (en) * 2007-11-29 2009-06-03 John E. Cygnor Vane pump with tilting pad radial bearings
CN102678545A (en) * 2012-05-28 2012-09-19 山西斯普瑞机械制造有限公司 Anti-friction vane and high-pressure anti-friction column pin type vane pump

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* Cited by examiner, † Cited by third party
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
CN103114993B (en) * 2012-12-05 2015-11-18 胡凯 A kind of step blade type hydraulic machinery

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US20010055538A1 (en) * 2000-01-20 2001-12-27 Willi Schneider Vane cell pump/motor

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Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
FR778346A (en) * 1933-12-05 1935-03-14 Improvements to vane blowers
US3111905A (en) * 1960-09-02 1963-11-26 Eickmann Karl Casing capsule ring arrangement for a rotary vane machine
US3153384A (en) * 1961-06-12 1964-10-20 Pacific Ind Mfg Co Vane type pump
GB2074247A (en) * 1980-04-16 1981-10-28 Skf Kugellagerfabriken Gmbh Rotary Positive-displacement Pumps
US20010055538A1 (en) * 2000-01-20 2001-12-27 Willi Schneider Vane cell pump/motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP2065561A2 (en) * 2007-11-29 2009-06-03 John E. Cygnor Vane pump with tilting pad radial bearings
EP2065561A3 (en) * 2007-11-29 2012-12-19 Hamilton Sundstrand Corporation Vane pump with tilting pad radial bearings
CN102678545A (en) * 2012-05-28 2012-09-19 山西斯普瑞机械制造有限公司 Anti-friction vane and high-pressure anti-friction column pin type vane pump

Also Published As

Publication number Publication date
EP1812712B1 (en) 2018-01-10
US20090155113A1 (en) 2009-06-18
CN101087959B (en) 2010-05-26
CN101087959A (en) 2007-12-12
JP2008520897A (en) 2008-06-19
EP1812712A1 (en) 2007-08-01
ITBO20040088U1 (en) 2005-02-19
WO2006054158A8 (en) 2006-08-10

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