IT201800007168A1 - VANE PUMP - Google Patents

VANE PUMP Download PDF

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Publication number
IT201800007168A1
IT201800007168A1 IT102018000007168A IT201800007168A IT201800007168A1 IT 201800007168 A1 IT201800007168 A1 IT 201800007168A1 IT 102018000007168 A IT102018000007168 A IT 102018000007168A IT 201800007168 A IT201800007168 A IT 201800007168A IT 201800007168 A1 IT201800007168 A1 IT 201800007168A1
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IT
Italy
Prior art keywords
vane
pump
vane pump
axis
around
Prior art date
Application number
IT102018000007168A
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Italian (it)
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Priority to IT102018000007168A priority Critical patent/IT201800007168A1/en
Priority to CN201910629372.3A priority patent/CN110714915A/en
Publication of IT201800007168A1 publication Critical patent/IT201800007168A1/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
    • F01C21/0818—Vane tracking; control therefor
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/045—Arrangements for driving rotary positive-displacement pumps
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • 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
    • F04C2/3442—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 the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • 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
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/203—Fuel
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F05C2251/12—Magnetic properties

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rotary Pumps (AREA)

Description

DESCRIZIONE DESCRIPTION

del brevetto per invenzione industriale dal titolo: of the patent for industrial invention entitled:

“POMPA A PALETTE” "VANE PUMP"

La presente invenzione è relativa ad una pompa a palette. The present invention relates to a vane pump.

La presente invenzione trova applicazione particolarmente vantaggiosa in un gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna, cui la trattazione che segue farà esplicito riferimento senza per questo perdere in generalità. The present invention finds particularly advantageous application in a pumping unit for feeding fuel, preferably diesel oil, to an internal combustion engine, to which the following discussion will make explicit reference without thereby losing generality.

Nel settore dei gruppi di pompaggio per alimentare combustibile ad un motore a combustione interna, è noto realizzare un gruppo di pompaggio del tipo comprendente una pompa di alta pressione, per esempio una pompa a pistoni, per alimentare combustibile ad un motore a combustione interna; ed una pompa di bassa pressione o di prealimentazione per alimentare combustibile da un serbatoio di contenimento alla pompa di alta pressione. In the field of pumping units for supplying fuel to an internal combustion engine, it is known to provide a pumping unit of the type comprising a high pressure pump, for example a piston pump, for feeding fuel to an internal combustion engine; and a low pressure or pre-supply pump for feeding fuel from a containment tank to the high pressure pump.

La pompa di bassa pressione è una pompa a palette comprendente un corpo pompa comprendente, a sua volta, una carcassa di contenimento conformata a tazza ed un coperchio di chiusura della carcassa di contenimento stessa. The low pressure pump is a vane pump comprising a pump body comprising, in turn, a cup-shaped containment casing and a lid for closing the containment casing itself.

La carcassa di contenimento è limitata da una parete di fondo sostanzialmente piana e da una parete laterale interna sostanzialmente cilindrica, ed alloggia al proprio interno un rotore montato per ruotare attorno ad un asse di rotazione, che è sostanzialmente perpendicolare alla parete di fondo, ed è parallelo a, e distinto da, un asse longitudinale della parete laterale interna stessa. The containment casing is limited by a substantially flat bottom wall and by a substantially cylindrical internal side wall, and houses inside it a rotor mounted to rotate around an axis of rotation, which is substantially perpendicular to the bottom wall, and is parallel to, and distinct from, a longitudinal axis of the inner side wall itself.

Il rotore presenta una pluralità di tasche, che sono uniformemente distribuite attorno all’asse di rotazione, e si aprono verso l’esterno in corrispondenza di un bordo perimetrale esterno del rotore stesso. The rotor has a plurality of pockets, which are uniformly distributed around the rotation axis, and open outwards at an outer perimeter edge of the rotor itself.

Ciascuna tasca è impegnata in maniera scorrevole da una paletta di trascinamento, che si estende parallelamente all’asse di rotazione del rotore, e sporge all’esterno della tasca per disporsi a contatto della parete laterale interna della carcassa di contenimento. Each pocket is engaged in a sliding manner by a drag vane, which extends parallel to the rotation axis of the rotor, and protrudes outside the pocket to arrange itself in contact with the internal side wall of the containment casing.

Ciascuna paletta di trascinamento viene spinta e mantenuta contro la parete laterale interna della carcassa di contenimento da una molla alloggiata all’interno della tasca ed interposta tra il rotore e la paletta di trascinamento stessa. Each drag vane is pushed and held against the internal side wall of the containment casing by a spring housed inside the pocket and interposed between the rotor and the drag vane itself.

Le palette di trascinamento sono distribuite attorno all’asse di rotazione in modo da definire una pluralità di camere a volume variabile, che sono accoppiate a tenuta di fluido fra loro, e vengono avanzate dal rotore in primo luogo attraverso un ingresso del combustibile nella pompa a palette e quindi attraverso una uscita del combustibile dalla pompa a palette stessa. The drive vanes are distributed around the axis of rotation so as to define a plurality of variable volume chambers, which are fluid-tight coupled to each other, and are advanced by the rotor first through a fuel inlet into the pump. vanes and then through a fuel outlet from the vane pump itself.

Dal momento che le palette di trascinamento vengono mantenute a contatto della parete laterale interna della carcassa di contenimento dalla forza centrifuga generata dalla rotazione del rotore e dalla spinta radiale esercitata dalle molle, le pompe a palette note del tipo sopra descritto presentano alcuni inconvenienti principalmente discendenti dal fatto che, quando il rotore presenta una velocità di rotazione relativamente ridotta, le forze centrifughe agenti sulle palette di trascinamento sono relativamente ridotte e compromettono il corretto accoppiamento a tenuta di fluido tra le camere a volume variabile. Since the driving vanes are kept in contact with the internal side wall of the containment casing by the centrifugal force generated by the rotation of the rotor and by the radial thrust exerted by the springs, known vane pumps of the type described above have some drawbacks mainly deriving from the the fact that, when the rotor has a relatively low rotation speed, the centrifugal forces acting on the driving vanes are relatively low and compromise the correct fluid-tight coupling between the variable volume chambers.

Le pompe a palette note del tipo sopra descritto presentano, inoltre, l’ulteriore inconveniente costituito dal fatto che la spinta radiale esercitata dalle molle varia in funzione della posizione angolare del rotore attorno al citato asse di rotazione. The known vane pumps of the type described above also have the further drawback constituted by the fact that the radial thrust exerted by the springs varies as a function of the angular position of the rotor around the aforementioned axis of rotation.

Scopo della presente invenzione è di realizzare una pompa a palette che sia esente dagli inconvenienti sopra descritti e che sia di semplice ed economica attuazione. The object of the present invention is to provide a vane pump which is free from the drawbacks described above and which is simple and economical to implement.

Secondo la presente invenzione viene realizzata una pompa a palette come rivendicato nelle rivendicazioni allegate. According to the present invention, a vane pump is realized as claimed in the attached claims.

La presente invenzione verrà ora descritta con riferimento ai disegni annessi, che ne illustrano un esempio di attuazione non limitativo, in cui: The present invention will now be described with reference to the attached drawings, which illustrate a non-limiting example of embodiment, in which:

la figura 1 è una prima vista schematica in sezione, con parti asportate per chiarezza, di un gruppo di pompaggio provvisto di una preferita forma di attuazione della pompa a palette della presente invenzione; Figure 1 is a first schematic sectional view, with parts removed for clarity, of a pumping unit provided with a preferred embodiment of the vane pump of the present invention;

la figura 2 è una seconda vista schematica in sezione, con parti asportate per chiarezza, del gruppo di pompaggio della figura 1; Figure 2 is a second schematic sectional view, with parts removed for clarity, of the pumping unit of Figure 1;

la figura 3 è una vista frontale schematica, con parti asportate per chiarezza, della pompa a palette della figura 1; e Figure 3 is a schematic front view, with parts removed for clarity, of the vane pump of Figure 1; And

la figura 4 è una vista frontale schematica, con parti asportate per chiarezza, di una variante della pompa a palette della figura 3. Figure 4 is a schematic front view, with parts removed for clarity, of a variant of the vane pump of Figure 3.

Con riferimento alle figure 1 e 2, con 1 è indicato, nel suo complesso, un gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna (non illustrato). With reference to Figures 1 and 2, 1 indicates, as a whole, a pumping unit for feeding fuel, preferably diesel oil, to an internal combustion engine (not shown).

Il gruppo di pompaggio 1 comprende una pompa 2 di alta pressione per alimentare il combustibile al citato motore a combustione interna (non illustrato); ed una pompa 3 di bassa pressione o pre-alimentazione per alimentare il combustibile da un serbatoio di contenimento noto e non illustrato alla pompa 2 stessa. The pumping unit 1 comprises a high pressure pump 2 for supplying fuel to the aforementioned internal combustion engine (not shown); and a low pressure or pre-feed pump 3 for feeding fuel from a known containment tank and not shown to the pump 2 itself.

La pompa 2 di alta pressione è una pompa a pistoni comprendente un corpo pompa 4, il quale è provvisto di un foro 5 centrale presentante un asse 6 longitudinale, ed è provvisto, inoltre, di almeno un foro 7 laterale (normalmente una pluralità di fori 7 uniformemente distribuiti attorno all’asse 6), che presenta un asse 8 longitudinale trasversale all’asse 6, e si estende radialmente verso l’esterno del corpo pompa 4 a partire dal foro 5 stesso. The high pressure pump 2 is a piston pump comprising a pump body 4, which is provided with a central hole 5 having a longitudinal axis 6, and is also provided with at least one lateral hole 7 (normally a plurality of holes 7 uniformly distributed around the axis 6), which has a longitudinal axis 8 transverse to the axis 6, and extends radially towards the outside of the pump body 4 starting from the hole 5 itself.

Ciascun foro 7 è chiuso da una testata 9, la quale è disposta a contatto del corpo pompa 4, e presenta una appendice 10 sporgente all’interno del foro 7 coassialmente all’asse 8. Each hole 7 is closed by a head 9, which is arranged in contact with the pump body 4, and has an appendix 10 protruding inside the hole 7 coaxially to the axis 8.

La testata 9 presenta un foro 11 centrale, il quale è ricavato attraverso la testata 9 coassialmente all’asse 8, e comprende una porzione 12 allargata ed una porzione 13 ristretta allineate fra loro lungo l’asse 8 stesso. The head 9 has a central hole 11, which is obtained through the head 9 coaxially to the axis 8, and includes an enlarged portion 12 and a narrow portion 13 aligned with each other along the axis 8 itself.

La porzione 13 è affacciata al foro 5, e definisce un cilindro 14 della pompa 2 di alta pressione. The portion 13 faces the hole 5, and defines a cylinder 14 of the high pressure pump 2.

Il cilindro 14 è impegnato in maniera scorrevole da un pistone 15 mobile, sotto la spinta di un dispositivo 16 di azionamento, con un moto rettilineo alternativo comprendente una corsa di aspirazione del combustibile nel cilindro 14 ed una corsa di compressione del combustibile contenuto all’interno del cilindro 14 stesso. The cylinder 14 is engaged in a sliding manner by a movable piston 15, under the thrust of an actuation device 16, with a reciprocating rectilinear motion comprising an intake stroke for the fuel in the cylinder 14 and a compression stroke for the fuel contained inside. of the cylinder 14 itself.

Il dispositivo 16 comprende un manicotto 17 tubolare, il quale è impegnato in maniera scorrevole all’interno del foro 7 coassialmente all’asse 8, si estende attorno al cilindro 14, e presenta una flangia 18 anulare interna, che sporge radialmente da una superficie interna del manicotto 17, e divide il manicotto 17 stesso in due porzioni 19, 20 cilindriche, di cui la porzione 19 è affacciata al foro 5. The device 16 comprises a tubular sleeve 17, which is slidingly engaged inside the hole 7 coaxially with the axis 8, extends around the cylinder 14, and has an internal annular flange 18, which protrudes radially from an internal surface of the sleeve 17, and divides the sleeve 17 itself into two cylindrical portions 19, 20, of which the portion 19 faces the hole 5.

Il dispositivo 16 presenta, inoltre, una punteria 21 comprendente un blocco 22 di accoppiamento di forma sostanzialmente cilindrica, il quale è bloccato per interferenza all’interno della porzione 19, è disposto a contatto della flangia 18, e supporta un rullo 23 di punteria. The device 16 also has a tappet 21 comprising a substantially cylindrical coupling block 22, which is blocked by interference inside the portion 19, is arranged in contact with the flange 18, and supports a tappet roller 23.

Il rullo 23 sporge dal blocco 22 verso il foro 5, ed è accoppiato in maniera girevole al blocco 22 per ruotare, rispetto al blocco 22 stesso, attorno ad un proprio asse 24 longitudinale sostanzialmente perpendicolare all’asse 8. The roller 23 protrudes from the block 22 towards the hole 5, and is rotatably coupled to the block 22 to rotate, with respect to the block 22 itself, around its own longitudinal axis 24 substantially perpendicular to the axis 8.

La flangia 18 supporta un piattello 25 anulare, il quale si estende attorno al pistone 15, è inserito all’interno della porzione 20 del manicotto 17 coassialmente all’asse 8, e presenta un bordo perimetrale esterno affacciato assialmente alla flangia 18 ed un bordo perimetrale interno affacciato assialmente ad una testa del pistone 15 stesso. The flange 18 supports an annular plate 25, which extends around the piston 15, is inserted inside the portion 20 of the sleeve 17 coaxially to the axis 8, and has an external perimeter edge facing axially to the flange 18 and a perimetral edge internal facing axially to a head of the piston 15 itself.

Il dispositivo 16 comprende, inoltre, una molla 26 a compressione, la quale è montata tra l’appendice 10 ed il manicotto 17 coassialmente all’asse 8, ed è interposta tra la testata 9 ed il piattello 25 per spostare, e normalmente mantenere, il piattello 25 a contatto della flangia 18 ed il rullo 23 a contatto di una camma 27 ricavata su una superficie esterna di una porzione intermedia di un albero 28 di trasmissione montato attraverso il foro 5 per ruotare, rispetto al corpo pompa 4, attorno all’asse 6. The device 16 also comprises a compression spring 26, which is mounted between the appendix 10 and the sleeve 17 coaxially to the axis 8, and is interposed between the head 9 and the plate 25 to move, and normally maintain, the plate 25 in contact with the flange 18 and the roller 23 in contact with a cam 27 obtained on an external surface of an intermediate portion of a transmission shaft 28 mounted through the hole 5 to rotate, with respect to the pump body 4, around the axis 6.

La testata 9 alloggia al proprio interno una valvola 29 di aspirazione del combustibile nel cilindro 14 ed una valvola 30 di mandata del combustibile al motore a combustione interna (non illustrato). The head 9 houses inside it a valve 29 for the intake of the fuel in the cylinder 14 and a valve 30 for delivering the fuel to the internal combustion engine (not shown).

Secondo quanto illustrato nella figura 3, la pompa 3 di bassa pressione o pre-alimentazione è una pompa a palette comprendente un corpo pompa 31 comprendente, a sua volta, una carcassa 32 di contenimento, la quale presenta una forma a tazza, è limitata da una parete 33 di fondo sostanzialmente piana, ed è limitata, inoltre, da una parete 34 laterale interna sostanzialmente cilindrica. As shown in Figure 3, the low pressure or pre-feed pump 3 is a vane pump comprising a pump body 31 comprising, in turn, a containment casing 32, which has a cup shape, is limited by a substantially flat bottom wall 33, and is also limited by a substantially cylindrical internal side wall 34.

Il corpo pompa 31 comprende, inoltre, un coperchio 35 (figura 2) per chiudere la carcassa 32, ed alloggia al proprio interno un rotore 36 montato per ruotare attorno ad un asse 37 di rotazione parallelo a, e distinto da, un asse 38 longitudinale della parete 34. The pump body 31 also comprises a cover 35 (figure 2) to close the casing 32, and houses inside a rotor 36 mounted to rotate around a rotation axis 37 parallel to, and distinct from, a longitudinal axis 38 of wall 34.

Il rotore 36 presenta una pluralità di tasche 39, le quali sono uniformemente distribuite attorno all’asse 37, e si aprono verso l’esterno in corrispondenza di un bordo perimetrale esterno del rotore 36 stesso. The rotor 36 has a plurality of pockets 39, which are uniformly distributed around the axis 37, and open outwards at an external perimeter edge of the rotor 36 itself.

Ciascuna tasca 39 è impegnata in maniera scorrevole da una paletta 40 di trascinamento, la quale si estende parallelamente all’asse 37, è realizzata in materiale metallico ferromagnetico, e sporge radialmente all’esterno della tasca 39 per disporsi a contatto della parete 34. Each pocket 39 is engaged in a sliding manner by a drag blade 40, which extends parallel to the axis 37, is made of ferromagnetic metal material, and protrudes radially outside the pocket 39 to arrange itself in contact with the wall 34.

Le palette 40 definiscono fra loro una pluralità di camere 41 a volume variabile, le quali sono accoppiate a tenuta di fluido fra loro, e vengono avanzate dal rotore 36 attorno all’asse 37 in primo luogo attraverso un ingresso 42 del combustibile nella pompa 3 e quindi attraverso una uscita 43 del combustibile dalla pompa 3 stessa. The vanes 40 define between them a plurality of variable volume chambers 41, which are coupled in a fluid-tight manner to each other, and are advanced by the rotor 36 around the axis 37 firstly through a fuel inlet 42 into the pump 3 and then through a fuel outlet 43 from the pump 3 itself.

Ciascuna paletta 40 viene spinta a contatto della parete 34 dalla forza centrifuga generata dalla rotazione del rotore 36 attorno all’asse 37 e da una forza radiale supplementare generata da un magnete 44 anulare montato attorno alla carcassa 32 coassialmente all’asse 38. Each vane 40 is pushed into contact with the wall 34 by the centrifugal force generated by the rotation of the rotor 36 around the axis 37 and by an additional radial force generated by an annular magnet 44 mounted around the casing 32 coaxially to the axis 38.

Secondo alcune varianti non illustrate: According to some variants not illustrated:

il magnete 44 è montato nella carcassa 32 coassialmente all’asse 38; the magnet 44 is mounted in the casing 32 coaxially to the axis 38;

il magnete 44 viene eliminato e sostituito con una pluralità di magneti montati attorno alla carcassa 32 e distribuiti attorno all’asse 38; e the magnet 44 is eliminated and replaced with a plurality of magnets mounted around the casing 32 and distributed around the axis 38; And

il magnete 44 viene eliminato e sostituito con una pluralità di magneti montati nella carcassa 32 e distribuiti attorno all’asse 38. the magnet 44 is eliminated and replaced with a plurality of magnets mounted in the casing 32 and distributed around the axis 38.

La variante illustrata nella figura 4 differisce da quanto illustrato nelle figure precedenti unicamente per il fatto che, in essa, ciascuna paletta 40 viene eliminata e sostituita con una paletta 45, la quale è realizzata in materiale plastico o in materiale metallico non ferromagnetico, e porta integrata un’asta 46 in materiale metallico ferromagnetico. The variant illustrated in Figure 4 differs from what is illustrated in the previous figures only in that, in it, each blade 40 is eliminated and replaced with a blade 45, which is made of plastic or non-ferromagnetic metal material, and carries integrated rod 46 in ferromagnetic metal material.

Secondo una variante non illustrata, ciascuna asta 46 viene eliminata e sostituita con un relativo magnete, il magnete 44 viene eliminato, e la parete 34 laterale è realizzata in materiale metallico ferromagnetico. According to a variant not shown, each rod 46 is eliminated and replaced with a relative magnet, the magnet 44 is eliminated, and the side wall 34 is made of ferromagnetic metal material.

Il gruppo di pompaggio 1 presenta alcuni vantaggi principalmente discendenti dal fatto che la forza radiale supplementare generata dal magnete 44 garantisce un corretto accoppiamento a tenuta di fluido tra le camere 41 a volume variabile anche quando il rotore 36 presenta una velocità di rotazione relativamente ridotta. The pumping unit 1 has some advantages mainly deriving from the fact that the additional radial force generated by the magnet 44 guarantees a correct fluid-tight coupling between the chambers 41 with variable volume even when the rotor 36 has a relatively low rotation speed.

Claims (1)

RIVENDICAZIONI 1.- Pompa a palette comprendente un corpo pompa (31); un rotore (36) montato all’interno del corpo pompa (31) per ruotare attorno ad un asse di rotazione (37); ed una pluralità di tasche (39) ricavate nel rotore (36) per alloggiare al proprio interno, ciascuna, una rispettiva paletta di trascinamento (40; 45), la quale è accoppiata in maniera scorrevole alla relativa tasca (39), e viene avanzata dal rotore (36) attorno all’asse di rotazione (37) e lungo una parete laterale interna (34) del corpo pompa (31); ed essendo caratterizzata dal fatto di comprendere, inoltre, mezzi magnetici (44) montati attorno alla parete laterale interna (34) o nelle palette di trascinamento (40; 45) per spingere le palette di trascinamento (40; 45) contro la parete laterale interna (34) stessa. 2.- Pompa a palette secondo la rivendicazione 1, in cui le palette di trascinamento (40) sono realizzate in materiale metallico ferromagnetico. 3.- Pompa a palette secondo la rivendicazione 1, in cui ciascuna paletta di trascinamento (45) è realizzata in materiale plastico o in materiale metallico non ferromagnetico e porta integrato un elemento metallico ferromagnetico (46). 4.- Pompa a palette secondo una qualsiasi delle precedenti rivendicazioni, in cui i mezzi magnetici (44) comprendono un magnete anulare montato attorno al corpo pompa (31) ed all’asse di rotazione (37). 5.- Pompa a palette secondo una qualsiasi delle rivendicazioni da 1 a 3, in cui i mezzi magnetici (44) comprendono un magnete anulare montato nel corpo pompa (31) attorno all’asse di rotazione (37). 6.- Pompa a palette secondo una qualsiasi delle rivendicazioni da 1 a 3, in cui i mezzi magnetici (44) comprendono una pluralità di magneti distribuiti attorno al corpo pompa (31) ed all’asse di rotazione (37). 7.- Pompa a palette secondo una qualsiasi delle rivendicazioni da 1 a 3, in cui i mezzi magnetici (44) comprendono una pluralità di magneti montati nel corpo pompa (31) e distribuiti attorno all’asse di rotazione (37). 8.- Pompa a palette secondo la rivendicazione 1, in cui ciascuna paletta di trascinamento (45) è realizzata in materiale plastico o in materiale metallico non ferromagnetico ed in cui la parete laterale interna (34) è realizzata in materiale metallico ferromagnetico; i mezzi magnetici (44) essendo montati nelle palette di trascinamento (45). 9.- Pompa a palette secondo una qualsiasi delle precedenti rivendicazioni, in cui l’asse di rotazione (37) è parallelo a, e distinto da, un asse longitudinale (38) della parete laterale interna (34). 10.- Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna, il gruppo di pompaggio comprendendo una pompa di alta pressione (2) per alimentare combustibile al motore a combustione interna; ed una pompa di bassa pressione (3) per alimentare combustibile da un serbatoio di contenimento alla pompa di alta pressione (2); la pompa di bassa pressione (3) essendo una pompa a palette secondo una qualsiasi delle precedenti rivendicazioni. CLAIMS 1.- Vane pump comprising a pump body (31); a rotor (36) mounted inside the pump body (31) to rotate around a rotation axis (37); and a plurality of pockets (39) formed in the rotor (36) to house, each inside, a respective drag blade (40; 45), which is coupled in a sliding manner to the relative pocket (39), and is advanced from the rotor (36) around the axis of rotation (37) and along an internal side wall (34) of the pump body (31); and being characterized in that it further comprises magnetic means (44) mounted around the inner side wall (34) or in the drive vanes (40; 45) to push the drive vanes (40; 45) against the inner side wall (34) itself. 2.- Vane pump according to Claim 1, wherein the driving vanes (40) are made of ferromagnetic metal material. 3.- Vane pump according to Claim 1, wherein each driving vane (45) is made of plastic or non-ferromagnetic metal material and carries an integrated ferromagnetic metal element (46). 4.- Vane pump according to any of the preceding claims, in which the magnetic means (44) comprise an annular magnet mounted around the pump body (31) and the rotation axis (37). 5.- Vane pump according to any one of claims 1 to 3, wherein the magnetic means (44) comprise an annular magnet mounted in the pump body (31) around the rotation axis (37). 6.- Vane pump according to any one of claims 1 to 3, in which the magnetic means (44) comprise a plurality of magnets distributed around the pump body (31) and the rotation axis (37). 7.- Vane pump according to any one of claims 1 to 3, in which the magnetic means (44) comprise a plurality of magnets mounted in the pump body (31) and distributed around the rotation axis (37). 8.- Vane pump according to claim 1, wherein each driving vane (45) is made of plastic or non-ferromagnetic metal material and wherein the internal side wall (34) is made of ferromagnetic metal material; the magnetic means (44) being mounted in the driving vanes (45). 9.- Vane pump according to any of the preceding claims, in which the axis of rotation (37) is parallel to, and distinct from, a longitudinal axis (38) of the internal side wall (34). 10.- Pumping unit for feeding fuel, preferably diesel oil, to an internal combustion engine, the pumping unit comprising a high pressure pump (2) for feeding fuel to the internal combustion engine; and a low pressure pump (3) for supplying fuel from a containment tank to the high pressure pump (2); the low pressure pump (3) being a vane pump according to any one of the preceding claims.
IT102018000007168A 2018-07-13 2018-07-13 VANE PUMP IT201800007168A1 (en)

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IT102018000007168A IT201800007168A1 (en) 2018-07-13 2018-07-13 VANE PUMP
CN201910629372.3A CN110714915A (en) 2018-07-13 2019-07-12 Vane pump

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IT102018000007168A IT201800007168A1 (en) 2018-07-13 2018-07-13 VANE PUMP

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007603A1 (en) * 2005-02-18 2006-08-24 Siemens Ag Vane pump, for pumping fluids, has magnetic components holding vanes in position on inner track of displacement ring
US20130202470A1 (en) * 2012-02-08 2013-08-08 Shining Golden Yida Welding & Cutting Machinery Manufacture Ltd. Rotary Vane Air Motor with Improved Vanes and Other Improvements
DE202017003038U1 (en) * 2017-06-08 2017-08-29 Jens Lüdemann Control of the slide of a slider pump (made of ferromagnetic attractable materials) by the use of magnets

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007603A1 (en) * 2005-02-18 2006-08-24 Siemens Ag Vane pump, for pumping fluids, has magnetic components holding vanes in position on inner track of displacement ring
US20130202470A1 (en) * 2012-02-08 2013-08-08 Shining Golden Yida Welding & Cutting Machinery Manufacture Ltd. Rotary Vane Air Motor with Improved Vanes and Other Improvements
DE202017003038U1 (en) * 2017-06-08 2017-08-29 Jens Lüdemann Control of the slide of a slider pump (made of ferromagnetic attractable materials) by the use of magnets

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