EP3158196B1 - Rotationsflüssigkeitspumpe - Google Patents

Rotationsflüssigkeitspumpe Download PDF

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Publication number
EP3158196B1
EP3158196B1 EP15741341.0A EP15741341A EP3158196B1 EP 3158196 B1 EP3158196 B1 EP 3158196B1 EP 15741341 A EP15741341 A EP 15741341A EP 3158196 B1 EP3158196 B1 EP 3158196B1
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EP
European Patent Office
Prior art keywords
vane
rotor
internal
slot
fluid pump
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EP15741341.0A
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English (en)
French (fr)
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EP3158196A1 (de
Inventor
Leonardo Cadeddu
Flavio COLA
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VHIT SpA
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VHIT SpA
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    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 group F04C18/08 or F04C18/22 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
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/32—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members
    • F04C18/322—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members with vanes hinged to the outer member and reciprocating with respect to the outer 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
    • 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

Definitions

  • the present invention relates to a rotary fluid pump, and more specifically to a rotary vacuum pump applied to an electric motor.
  • the invention finds application in the so-called mono-vane pumps, i.e. pumps in which the rotor comprises a single vane, and the following description will preferably, though not exclusively, refer to this kind of application.
  • WO2011033426 discloses a pump structure having a body defining a cavity having an inlet port and an outlet port arranged to allow the inflow of a fluid into the cavity and the outflow of said fluid from such cavity, respectively.
  • the known pumps comprises a rotor mounted in the hollow body so as to be rotatable about a main axis or revolution axis, and an orbiting piston driven by the rotor.
  • the orbiting piston is positioned eccentrically relative to the main axis, is mounted on the outside of the rotor so as to be rotatable about a secondary axis or rotation axis.
  • the pump further includes a vane which is located in the cavity, is slidable within the orbiting piston and is mounted in a fixed peripheral portion of the hollow body between the inlet and outlet ports so as to be able to oscillate.
  • the orbiting piston and the vane attached to the body cooperate in such a way as to divide in a cyclic and fluid-tight manner said cylindrical cavity into a first chamber with variable volume and a second chamber with variable volume, which first and second chambers communicate with the inlet port and the outlet port, respectively, and the point of separation between the two chambers is the point of articulation of the vane, said articulation point being fixed, whereas the point of tangency between the orbiting piston and the rotor is variable because of the roto-translational motion of the piston relative to the rotor.
  • a drawback is that said known vacuum pump has large axial dimensions that do not allow the pump to be mounted on the heat engine of a vehicle in the same space as that required by a mechanical vacuum pump.
  • a further drawback is that said pump, due to the fact that, because of its large dimensions, it cannot be mounted on the heat engine of the vehicle, must be mounted on the chassis or on the bodywork, thus increasing the noise of the pump.
  • a fluid rotary pump or enclosed positive displacement mechanism 10 for example a vacuum pump, to which reference is made hereinafter, integrated in an electric motor according to the present invention.
  • the vacuum pump 10 ( Fig. 1 ) comprises a hollow body 100, a stator 101, an external rotor 106, an internal rotor 111, and a vane 109.
  • the body 100 is a housing defining a substantially cylindrical cavity 20 in which the stator 101 and the external rotor 106, which is rotatably mounted in said stator 101 and has a cylindrical internal cavity 25 enclosing the internal rotor 111 and the vane 109, are mounted.
  • Said body 100 has an inlet port 114 and an outlet port 115, shown in Figure 2 .
  • the inlet port 114 is connected to a suction duct and allows the inflow of a fluid into the internal cavity 25, whereas the outlet port 115 is connected to a discharge duct and allow the outflow of the fluid from said internal cavity 25.
  • the body 100 is preferably made of a non-magnetic material, such as a thermoplastic or thermosetting material, or of an aluminium alloy.
  • Polyphenylene sulphide is preferred for use as a thermoplastic material, whereas phenolic plastics or resins (PF), charged with glass fibres, carbon fibres or aramidic fibres, are preferred as thermosetting materials.
  • the body 100 is made by moulding.
  • the body 100 is sealed in a fluid-tight manner, for example by means of a gasket, by a cover so as to define the cavity 20.
  • the stator 101 constitutes, with the external rotor 106, an electric motor, for example a DC motor of the brushless type.
  • the stator 111 is housed, for instance fitted, in the body 100 of the pump and is preferably formed by a pack of lamellae 102 made for example of a ferromagnetic material, for instance a silicon plate, including a plurality of windings 103 and corresponding polar expansions 104.
  • the stator 101 houses a guiding ring 105 having a small thickness and a cylindrical shape and made of a non-magnetic material of a plastic or metal type, for instance bronze, which has the function of guiding the external rotor 106.
  • the guiding ring 105 forms the gap between the windings 103, with their corresponding polar expansions 104, and a plurality of permanent magnets 107 that are arranged on the outer periphery of the external rotor 106.
  • the electromagnetic stator 101 and the permanent magnets 107 are arranged for mutually interacting electromagnetically and rotating the external rotor 106 rotatable about a main axis X-X.
  • said main axis X-X coincides with the axis of the cylindrical cavity 20.
  • the external rotor 106 is preferably made of a ferromagnetic material, or for example of a thermoplastic, thermosetting, metallic material, for instance of an aluminium alloy.
  • the external rotor 106 is manufactured by moulding/sintering.
  • the external rotor 106 is made of a ferromagnetic material.
  • the permanent magnets 107 can be co-moulded with the rotor or mounted in the rotor, for example they can be made of materials belonging to the family of "rare earths", or of ferromagnetic materials.
  • the rotary vacuum pump 10 integrated, in accordance with the present invention, in an electric motor preferably comprises an electronic control unit which controls, in a known manner by means of a dedicated software entirely or partially mounted on the control unit of the pump, the passage of electric current through the windings 103 that work as electromagnets.
  • the electronic control unit is a printed circuit board of a type known per se.
  • the electronic control unit can command in an electronically controlled manner the rotational speed of the external rotor 106.
  • the internal rotor 111 is mounted so as to be rotatable in the internal cavity 25, on a guide 112 provided in the body 100 so that said internal rotor is free to rotate about a secondary axis or rotation axis Y-Y of its own that is eccentrically positioned relative to the main axis X-X.
  • the vane 109 is slidably guided in a slot 110 which is radially provided in the internal rotor 111 and passes through said rotor in a through manner.
  • the vane 109 has a first end with a pivot 108 having a center or articulation axis C and is mounted in the external rotor 106 so as to be able to oscillate about the center C.
  • the external rotor 106 rotating about its main axis X-X and preferably guided by the guiding ring 105, entrains in its movement the pivot 108 of the vane 109 which is guided by the radial slot 110 of the internal rotor 111; said internal rotor 111, idly rotating about its secondary axis Y-Y, is brought into rotation by the vane 109 with a rotational period or rotational frequency equal to the one of the external rotor 106.
  • the internal rotor 111 and the vane 109 mounted on the external rotor 106 cooperate in such a way as to divide in a cyclic and fluid-tight manner the cylindrical cavity 25 into a first chamber with variable volume and a second chamber with variable volume.
  • the first and second chambers are mutually complementary and communicate with the inlet port 114 and the outlet port 115, respectively.
  • the vane 109 preferably is a mono-vane with a first end having a pivot 108 hinged inside the external rotor 106 and a second end terminating with a tip 123 that is guided in the body of the vane 109 and is axially slidable, for example pushed by an elastic element 124 or by the centrifugal force or by both.
  • the vane 109 is mounted hinged to the external rotor 106 in such a way that the vane, during its oscillation, passes through the internal rotor 111 in a through manner and is in contact with the internal side surface of the internal cylindrical cavity 25 at the tip 123 of its second end, thus separating the first chamber from the second chamber in a fluid-tight manner.
  • the external rotor 106 preferably comprises undercuts 106c that are suitably shaped so that the center C of the pivot 108 of the vane 109 remains, when in use, at a fixed distance R from the main axis X-X of the external rotor 106, i.e. so as to allow the pivot 108 to have solely a rotational motion about the center C and to prevent a translational motion thereof directed towards the inside of the cavity 25.
  • stator 101 and the various magnetic elements 103, 104, 107 arranged to operate the stator and the external rotor 106 as an electric motor remain unchanged, whereby what has already been described in respect of the first embodiment still applies.
  • the internal surface of the external rotor 106 comprises a first portion 106a, to which the pivot 108 of the vane 109 is hinged, and a second portion 106b, which is distal relative to the pivot 108.
  • the vane 109 is made without movable compensating tip 123 and thus has a fixed vane length 1, intended as the distance between the second end of the vane and the center C of the pivot 108.
  • the first portion 106a of the internal surface of the rotor 106 has a section having a circular profile in order to guarantee a point of tangency between the surface portion 106a and the internal rotor 111 during rotation of the rotors; said first portion 106a corresponds to the portion of the internal surface of the rotor 106 over which the second end of the vane 109 does not move during rotation.
  • the second portion 106b of the internal surface of the rotor 106 substantially corresponding to the surface portion over which the second end of the vane 109 moves, has a section with such a profile that each point P thereof that, during rotation of the rotors, is in a position opposite to the center C of the pivot 108 relative to the secondary axis Y-Y of the internal rotor 111, has the same distance from the center C of the pivot 108.
  • Said distance is preferably equal to the length 1 of the vane 109, so that the second end of the vane 109, during the whole rotation of the pump rotors, is preferably always in contact with the second portion 106b of the internal surface of the rotor 106, in contact points that are the points P of the second portion 106b as defined above.
  • the profile of the second portion 106b of the internal surface of the external rotor 106 is geometrically describable by means of a distance D, defined as the distance between the main axis X-X of the external rotor 106 and the contact point P between the second end of the vane 109 and the second portion 106b, and by means of an angle ⁇ , defined as the angle between a direction passing through the point P and through the axis X-X of the rotor 106 and a direction passing through the center C of the pivot 108 and through the axis X-X.
  • a distance D defined as the distance between the main axis X-X of the external rotor 106 and the contact point P between the second end of the vane 109 and the second portion 106b
  • an angle ⁇ defined as the angle between a direction passing through the point P and through the axis X-X of the rotor 106 and a direction passing through the center C of the pivot 108 and through the axis X-
  • the pivot 108 at the first end of the vane does not require optional undercuts 106c at the region where the vane is hinged in the rotor 106, because the profile of the portion 106b is such that it keeps the clearance between the vane 109 and the portion 106b constant.
  • this makes the structure of the rotor at the hinge stronger, easier to manufacture and therefore more reliable.
  • the vane 109 has a fixed length and does not have the movable compensating tip 123 and that the internal cavity 25 is cylindrical, whereby the displacement, as will be easily understood by the person skilled in the art, will be approximately 1/2 of the displacement of the first and second embodiments.
  • the external rotor 106 comprises undercuts 106c that are suitably shaped so that the center C of the pivot 108 of the vane 109 remains, when in use, at a fixed distance R from the main axis X-X of the external rotor 106, said distance R being greater than the radius of the internal cavity 25 by a quantity ⁇ .
  • the presence of the undercuts allows the pivot 108 to have solely a rotational motion about the center C and prevents a translational motion thereof directed towards the inside of the cavity 25.
  • the operation of the third embodiment is represented in the Figures 6, 7 and 8 .
  • the internal rotor 111 ( Fig. 1 - Fig. 8 ) has an external cylindrical surface that is tangentially almost in contact, as is usual, with the internal cylindrical surface of the external rotor 106 in their point of tangency 113 lying on the axis passing through the centers of the axes X-X and Y-Y.
  • the vacuum pump 10 includes, in the embodiments described so far, an inlet non-return or unidirectional valve 116 and an outlet lamellar non-return or "reed" valve 117 associated to the inlet port 114 and the outlet port 115, respectively.
  • the lubricating oil is sucked from the inside of the heat engine and said oil, after having lubricated the pump, will become mixed with the sucked air and form a mixture that will be discharged into the engine through the outlet lamellar non-return or "reed" valve 117.
  • Operation of the rotary vacuum pump integrated in an electric motor 10 of the invention is as follows.
  • the external rotor 106 rotating about its main axis X-X and preferably guided by the guiding ring 105, entrains in its movement the pivot 108 of the vane 109 which is guided by the radial slot 110 of the internal rotor 111.
  • Said internal rotor 111 idly rotating about its secondary axis Y-Y, is brought into rotation by the vane 109 with a rotational period or rotational frequency equal to the one of the external rotor 106, with a an angular speed that is variable (and symmetrical to each half-period: indeed, the enclosed positive displacement mechanism is symmetrical with respect to the axis passing through the centers of the axes X-X and Y-Y) .
  • the profile of the angular speed of the internal rotor depends on the dimensions of the enclosed positive displacement mechanism that is being described.
  • FIGS. 6, 7 and 8 show the positions of rotation that are significant for understanding the operation of the third embodiment of the pump 10 of the invention, wherein the vane 109 is made without movable compensating tip 123 and therefore, as is clear to the person skilled in the art, the displacement of this solution is the volume obtained by subtracting, from the internal volume of the external rotor for each round angle of rotation of the external rotor 106 and internal rotor 111, the volume of the internal rotor and of the part of vane projecting from said rotor; therefore in this arrangement the displacement is half that of the first embodiment, thus providing less variation of the resistive torque both at start and upon maintaining of depression; the emptying performance will in any case depend on the displacement.
  • the enclosed positive displacement mechanisms illustrated have been further integrated, in the preferred embodiment, in a brushless type electric motor.
  • This provides in an advantageous manner the fluid-tight sealing of the hollow body with its movable component arranged inside it. Indeed, in this way the hollow body does not require any further openings for a mechanical connection to further outer movable elements adapted to impart motion to the rotor.
  • the electric motor can also be a motor provided with brushes, even if this solution involves more maintenance than a brushless motor.
  • the vacuum pump is a multi-vane pump 200.
  • the pump comprises the stator 101 and the various magnetic elements 103, 104, 107 as described in connection with the first embodiment, to which reference is made for a detailed description.
  • the pump 200 further includes an external rotor 106 having an internal cylindrical cavity 25 in which an internal rotor 211 enclosed.
  • the internal rotor 211 has a first slot 210a and a second slot 210b provided radially relative to the rotor and so as to pass through the rotor in a through manner.
  • the first slot 210a and the second slot 210b are preferably arranged perpendicularly to each other.
  • a first vane 209a is slidably guided in the first slot 210a and has a first end with a pivot 108 that is mounted in the external rotor 106 so as to be able to oscillate; this rotor, similarly to what is provided for the preceding embodiments, rotates on its main axis X-X and entrains in its movement the pivot 108 of the vane 209a, which, being guided by the slot 210a, brings into rotation the internal rotor 211.
  • the pump 200 further comprises a second vane 209b, this too being slidably guided in the first slot 210a, and two further vanes 219a, 219b that are slidably guided in the second slot 210b.
  • the vanes 209b, 219a and 219b are mutually equal.
  • two walls 226, 227 are provided arranged along the longitudinal edges of the first slot 210a at the second slot 210b.
  • These walls 226, 227 allow to prevent the vanes 219a, 219b from engaging the first slot 210a and hitting against the vanes 209a, 209b guided by the first slot 210a, especially at low rotational speed, where the centrifugal force may not keep them in contact with the wall of the cavity 25, thus avoiding frictions between the vanes. In other embodiments said walls are not necessary.
  • This solution in particular, is preferably applicable in the case where the length of the vane 209a is such as to at least partially engage, in all the arrangements, the intersection between the slot 210a and the slot 210b.
  • the rotor 211 idly rotating on its axis Y-Y, is then brought into rotation by the vane 209a, with as rotational period equal to the rotational period of the external rotor 106 and with an angular speed that is variable over the period with a profile depending on the dimensions of the enclosed positive displacement mechanism as described, according to a relation equal to the one illustrated above for the mono-vane embodiments.
  • the vanes 209b, 219a and 219b when the internal rotor 211 is rotating, are subjected to a centrifugal force such that it brings them far from the secondary axis Y-Y of the internal rotor 211, making them partially come out of their corresponding slots until they encounter the internal side surface of the cavity 25.
  • the internal rotor 211 and the vanes 209a, 209b, 219a and 219b cooperate in such a way as to divide in a cyclic and fluid-tight manner the internal cylindrical cavity 25 into four chambers with variable volume, so as to suck, in a known manner, air from the inlet port 114 and to discharge the same from the outlet port 115, thanks to the fact that the internal rotor rotates counterclockwise, as shown in Fig. 10 .
  • This arrangement allows to eliminate the outlet valve provided in the mono-vane embodiments, because the stages of inflow of the fluid into the cavity 25 and of outflow of the fluid from the cavity 25 take place in chambers that are separated by the additional vanes provided.
  • the multi-vane arrangement further provides the advantage of obtaining a more regular flow rate of the pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)

Claims (14)

  1. Fluidpumpe (10), Folgendes umfassend:
    einen Hohlkörper (100), in den ein Stator (101) und ein Außenrotor (106) eines Elektromotors montiert sind, wobei der Außenrotor (106) um eine Hauptachse (X-X) drehbar montiert ist und einen inneren Hohlraum (25) aufweist, der mit einem Einlassstutzen (114) und einem Auslassstutzen (115) verbunden ist, die dazu angeordnet sind, das Einströmen eines Fluids in den inneren Hohlraum (25) bzw. das Ausströmen des Fluids aus dem inneren Hohlraum (25) zu ermöglichen;
    einen Innenrotor (111, 211), der in dem inneren Hohlraum (25) drehbar montiert ist, um sich frei um eine Sekundärachse (Y-Y) zu drehen;
    eine Schaufel (109, 209a), die ein erstes Ende und ein zweites Ende aufweist, wobei das erste Ende an einem Drehzapfen (108) bereitgestellt ist;
    wobei die Schaufel (109), die verschiebbar in einen im Innenrotor (111) ausgebildeten Schlitz (110) geführt wird, einen Drehpunkt (108) an ihrem ersten Ende aufweist;
    wobei der Innenrotor (111, 211) und die Schaufel (109, 209a) so zusammenwirken, dass sie den inneren Hohlraum (25) zyklisch und fluiddicht zumindest in eine erste Kammer mit variablem Volumen und eine zweite Kammer mit variablem Volumen teilen, wobei die erste und zweite Kammer mit dem Einlassstutzen (114) bzw. dem Auslassstutzen (115) verbunden sind;
    dadurch gekennzeichnet, dass
    - der Drehzapfen (108) schwingend im Außenrotor (106) montiert ist, sodass der Außenrotor (106) durch Schwingen um seine Hauptachse (X-X) in seiner Bewegung den Drehzapfen (108) der Schaufel (109, 209a) und den Innenrotor (111, 211), der von der Schaufel (109, 209a) in eine Drehung versetzt wird und sich im Leerlauf um seine Sekundärachse (Y-Y) dreht, mitnimmt, und dadurch, dass
    - die Schaufel (109, 209a) verschiebbar in einem im Innenrotor (111, 211) ausgebildeten ersten Schlitz (110, 210a) geführt wird und durch den Innenrotor hindurch verläuft.
  2. Fluidpumpe (10) nach Anspruch 1, dadurch gekennzeichnet, dass das zweite Ende der Schaufel (109) in einer Spitze (123) endet, die vom Körper der Schaufel (109) geführt wird und axial verschiebbar ist.
  3. Fluidpumpe (10) nach Anspruch 2, dadurch gekennzeichnet, dass die Spitze (123) durch ein elastisches Element (124) angeschoben axial verschoben wird.
  4. Fluidpumpe (10) nach Anspruch 1, dadurch gekennzeichnet, dass
    der innere Hohlraum (25) durch eine Innenfläche definiert wird, die einen ersten Abschnitt (106a) mit einem im Wesentlichen runden Querschnitt und einen zweiten Abschnitt (106b) mit einem Querschnitt, der ein Profil aufweist, sodass jeder Punkt (P) des zweiten Abschnitts (106b) denselben Abstand von der Mitte (C) des Drehzapfens (108) aufweist, aufweist, und dadurch, dass
    die Schaufel (109) einen Abstand (1) zwischen dem ersten und zweiten Ende aufweist, sodass das zweite Ende der Schaufel (109) bei der Verwendung den zweiten Teil (106b) der Innenfläche des Außenrotors (106) berührt.
  5. Fluidpumpe (10) nach Anspruch 1, ferner eine zweite Schaufel (209b), eine dritte Schaufel (219a) und eine
    vierte Schaufel (219b) umfassend und wobei ein zweiter Schlitz (210b) im Innenrotor (211) bereitgestellt ist, wobei die zweite Schaufel (209b) im ersten Schlitz (210a) verschiebbar montiert ist und die dritte Schaufel (219a) und die vierte Schaufel (219b) im zweiten Schlitz (210b) verschiebbar montiert sind,
    wobei der Innenrotor (211) und die Schaufeln (209a, 209b, 219a, 219b) so zusammenwirken, dass sie den inneren Hohlraum (25) zyklisch und fluiddicht in die erste Kammer mit variablem Volumen und die zweite Kammer mit variablem Volumen, wobei die erste und zweite Kammer mit dem Einlassstutzen (114) bzw. dem Auslassstutzen (115) verbunden sind, und in zwei weitere Kammern mit variablem Volumen teilen.
  6. Fluidpumpe (10) nach Anspruch 5, wobei der erste Schlitz (210a) und der zweite Schlitz (210b) senkrecht zueinander angeordnet sind.
  7. Fluidpumpe (10) nach Anspruch 4 oder 5, wobei der erste Schlitz (210a) zwei Wände (226, 227) umfasst, die entlang seiner Längskanten am zweiten Schlitz (210b) angeordnet sind.
  8. Fluidpumpe (10) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Elektromotor ein Gleichstrommotor ohne Bürsten bzw. ein bürstenloser Motor ist.
  9. Fluidpumpe (10) nach Anspruch 8, dadurch gekennzeichnet, dass der Außenrotor (106) mehrere Dauermagneten (107) umfasst, die sich auf dessen Außenrand befinden.
  10. Fluidpumpe (10) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Pumpe (10) eine Vakuumpumpe ist.
  11. Fluidpumpe (10) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein Führungsring (105), der dazu eingerichtet ist, den Außenrotor (106) zu führen, im Stator (101) untergebracht ist.
  12. Fluidpumpe (10) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass diese ferner eine im Hohlkörper (100) ausgebildete Öffnung (118) und Schmierkanäle, die das Schmieröl vom Inneren der Wärmekraftmaschine absaugen, das nach dem Schmieren der Pumpe und dem Vermischen mit der angesaugten Luft dazu eingerichtet ist, eine Mischung zu bilden, die durch ein Auslassventil (117) in den Motor abgegeben wird, umfasst.
  13. Verfahren zur Herstellung einer von einem Elektromotor angetriebenen Fluidpumpe (10), wobei die Pumpe (10) einen Außenrotor (106) umfasst, der um eine Hauptachse (X-X) des Elektromotors drehbar montiert ist; gekennzeichnet durch die folgenden Schritte:
    - drehbares Montieren eines Innenrotors (111, 211), der dazu eingerichtet ist, sich um eine Sekundärachse (Y-Y), die sich von der Hauptachse (X-X) unterscheidet, zu drehen, in einem inneren Hohlraum (25) des Außenrotors (106);
    - Montieren einer ersten Schaufel (109, 209a), die in einem ersten Schlitz (110, 210a) verschiebbar geführt wird, der im Innenrotor (111, 211) bereitgestellt ist, um durch den Innenrotor (111, 211) hindurch zu verlaufen;
    - verschwenkbares Befestigen eines Endes der Schaufel (109) am Außenrotor (106).
  14. Verfahren nach Anspruch 13, ferner die folgenden Schritte umfassend:
    - Montieren einer zweiten Schaufel (209b), die im ersten Schlitz (210a) verschiebbar geführt wird;
    - Montieren einer dritten Schaufel (219a) und einer vierten Schaufel (219b) in einem zweiten, im Innenrotor (211) bereitgestellten Schlitz (210b).
EP15741341.0A 2014-06-23 2015-06-23 Rotationsflüssigkeitspumpe Active EP3158196B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITTO20140500 2014-06-23
ITTO20150223 2015-04-22
PCT/IB2015/054705 WO2015198224A1 (en) 2014-06-23 2015-06-23 Rotary fluid pump

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EP3158196A1 EP3158196A1 (de) 2017-04-26
EP3158196B1 true EP3158196B1 (de) 2019-08-07

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3053082B1 (fr) 2016-06-27 2018-07-13 Sonceboz Automotive Sa Pompe a fluide motorisee
EP3505761A1 (de) * 2017-12-27 2019-07-03 Entecnia Consulting, S.L.U. Rotationspumpe
IT201800003151A1 (it) * 2018-02-28 2019-08-28 Agilent Tech Inc A Delaware Corporation Sistema di pompaggio per vuoto comprendente una pompa da vuoto ed il suo motore

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Publication number Priority date Publication date Assignee Title
US1223919A (en) * 1914-08-05 1917-04-24 Walter J Wilson Rotary pump.
US2420124A (en) * 1944-11-27 1947-05-06 Coulson Charles Chilton Motor-compressor unit
IT1395780B1 (it) 2009-09-16 2012-10-19 Vhit Spa Capsulismo, particolarmente per turbomacchine, turbomacchina comprendente tale capsulismo e gruppo rotante per tale capsulismo.
DE102010041550A1 (de) * 2010-09-28 2012-03-29 Mahle International Gmbh Pendelschieberzellenpumpe

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EP3158196A1 (de) 2017-04-26

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