EP1448894B1 - Auto suction hybrid pump - Google Patents

Abstract

A hybrid pump ( 1 ) with a housing ( 2 ) comprising at least one suction port ( 10 ) and at least one pressure port ( 11 ). A rotor ( 5 ) is eccentrically arranged in the housing chamber ( 3 ) which is substantially enclosed in a circular manner. The rotor ( 5 ) has a plurality of circumferentially spaced vanes ( 6 ) which are radially arranged at least in some segments and are made of a material that is resiliently deformable under centrifugal force. The eccentricity ( 14 ) of the rotor ( 5 ) in relation to the housing chamber ( 3 ) and the elasticity of the rotor vane ( 6 ) are such that in a first phase of low rotational speed, the radially distant end areas ( 7 ) of each vane ( 6 ) touch only some or no circumferential segments ( 4 ) of the housing chamber ( 3 ) in the course of one rotor ( 5 ) rotation, whereas in a second phase of higher rotational speed, the radially distant end areas ( 7 ) of all vanes ( 6 ) touch the inner wall ( 4 ) of the housing chamber ( 3 ) essentially during the entire rotor ( 5 ) rotation.

Description

The invention relates to a hybrid pump according to the preamble of claim 1.

In the construction of pumps for the promotion of fluids, especially liquids, the problem is that can be achieved with known centrifugal pumps, although a high efficiency and low operating noise of the pump, but these pumps are not self-priming, so a column of liquid from the Standstill out can not suck itself when the centrifugal pump is vented. This is particularly disadvantageous if such pumps have only short operating times and the pumped liquid column at standstill due to a height difference again runs out of the interior of the pump. Therefore, centrifugal pumps often have additional units with which before the actual operation of the centrifugal pump, the liquid column can be conveyed into the housing interior and thus the centrifugal pump does not run dry, but the housing interior is filled with liquid from the beginning.

Although other pump designs such as impeller pumps of known design are self-priming, but have only a low efficiency, since, for example, the internal friction of the pump must be overcome

Another design of pumps is the vane pump, in which arranged on a rotor, radially projecting wings divide subvolumes of the housing interior and therein each liquid is conveyed during the rotation of the rotor. The disadvantage here is especially that the wings of the vane pumps must be fitted very accurately, since they are arranged relatively displaceable to the rotor and in vane pumps due to the friction between the wings and the Gehäuseinnenwandung high wear of the pump occurs. For vane pumps are self-priming even in the ventilated state.

Such a further developed vane pump is shown in DE 195 45 045 A1, in which the blades of the vane pump are mounted on a rotor and formed elastically, so that the aerodynamically curved wings of the rotor move during the entire rotational movement of the rotor along the inner surface of the housing interior and abut on this under variable bias. In order for the wings of the rotor separate individual volumes within the housing interior from each other, wherein the eccentricity between the rotor and the housing interior a corresponding delivery of a fluid and a pressure build-up in principle known for vane pump is possible. The flexibility of the aerodynamically shaped wing of the rotor in this case has the advantage that only slight wear between the Gehäuseinnenwandung and the blades of the rotor occurs because the wings adapt under elastic bias to the different distances to the housing inner wall and create the Gehäuseinnenwandung. However, the efficiency of this pump is by design not particularly high and the wear against e.g. Centrifugal pumps much higher.

Object of the present invention is therefore to develop a pump which is on the one hand self-priming and at the same time can work at high efficiencies and, moreover, is inexpensive to manufacture.

The solution of the object of the invention results from the characterizing features of claim 1 in conjunction with the features of the preamble. Further advantageous embodiments of the invention will become apparent from the dependent claims.

The invention relates to a pump with a housing, in each of which at least one suction port and a pressure port opens and in whose substantially circular enclosed housing interior, a rotor is arranged eccentrically, the periphery of a number of spaced, at least partially radially arranged rotor blades Has a resiliently deformable under the influence of centrifugal force elastically deformable material. Such a pump is further developed in that the eccentricity of the rotor relative to the housing interior and the elasticity of the rotor blades are selected such that each rotor blade in a first range of low speed with its radially projecting end portion in the course of one revolution of the rotor is not or only temporarily applied to peripheral portions of the housing interior, whereas in a second region of higher speed all rotor blades with their radially projecting end under centrifugal force substantially during the entire revolution of the rotor abut against the inner wall of the housing interior. This makes it possible to operate in the first range of low speed, the hybrid pump so that it works mainly as a pure flow pump substantially corresponding to a centrifugal pump. After exceeding a threshold value for the speed, however, the hybrid pump changes its operating behavior by deforming the rotor blades under the influence of centrifugal force elastically so that they rest with their radially projecting end portions substantially during the entire revolution of the rotor to the inner wall of the housing interior and thus partial volumes of Separate housing interior from each other liquid-tight. This makes it possible to ensure self-priming of a liquid column with the hybrid pump operating essentially in accordance with a conventional vane pump, even if the hybrid pump has previously been in a ventilated state, for example due to a standstill. If the hybrid pump has run empty, for example because of this standstill, then a drive motor will accelerate the liquid pump operating without liquid content very quickly to its maximum speed, so that the hybrid pump is operated almost immediately in the second region of higher speed and works in this operating state so-to-speak as a vane pump self-priming and promotes fluid into the housing interior. If the pump is then filled with liquid as a result, the rotational speed of the drive motor will decrease to such an extent due to the acting counterrotating torques and the influence of the liquid that the operating state of the hybrid pump passes into the first low-speed region in which the hybrid pump operates quasi according to a centrifugal pump and promotes fluid at high efficiency. This transition between the two operating states therefore secures the operation of the hybrid pump against interference, which can occur when tearing the liquid column about pure centrifugal pumps. In this case, the hybrid pump automatically goes back to higher speeds after ventilation has occurred, whereby the self-priming operating state accordingly a vane pump adjusts again, with which the liquid can be sucked in again and re-filling of the hybrid pump, the speed drop occurs again.

The hybrid pump according to the invention therefore offers two essential functions of pumps, namely the self-priming and the operation with the highest possible efficiencies, in a single pump design. Thus, the hybrid pump according to the invention is particularly for applications of great advantage in which often only briefly the operation at full capacity is required, but at the same time due to frequent downtime slumping of the liquid column from the pump can not be avoided. In known pump designs this otherwise expensive constructions with check valves or the like. Must be provided to keep the liquid column in the pump, which are expensive and prone and beyond also negatively affect the efficiency of the pump, as the suction line by such internals no longer can be designed so freely throughout. Such provisions are otherwise unavoidable, for example, for pumps for the case-by-case filling of containers, with which, for example, fuel is withdrawn in relatively small quantities for filling vehicles from a storage container. Of course, a large number of corresponding applications of the hybrid pump according to the invention are conceivable.

An advantageous embodiment provides that the elastic deformability of the rotor blades is selected such that from a certain speed of the rotor, the deformation of the rotor blades due to the centrifugal force compensates for the eccentricity, so that substantially all ends of the rotor blades abut the inner wall of the housing interior and each other form separated compression spaces. The resulting due to the eccentricity of the hybrid pumping behavior can be adjusted depending on the elasticity of the rotor blades so that abut from a limit speed, the rotor blades not only on parts of the peripheral surface of the housing interior, but during the entire rotation with this in contact and thus the Partial volumes of the housing interior separate from each other, as is basically known in conventional vane pumps. Thus, during operation of the hybrid pump as a pure flow pump corresponding to a centrifugal pump below the limit speed the wear due to the largely lack of friction between the rotor blades and the housing inner wall not present or only very low, only to fill the housing interior with the liquid through the self-priming during operation according to a vane pump, the rotor blade to the Gehäuseinnenwandung. Thus, the wear of the rotor blades during operation is minimized. In addition, the hybrid pump can also promote particles contaminated with particles, since the deformability of the rotor blades permits corresponding deformations in the passage of even larger particles in which rigid rotor blades would break.

It is advantageous if each rotor blade has an aerodynamically curved cross-sectional shape in which each rotor blade touches the inner wall of the housing interior under elastic prestressing, even at a slow rotation of the rotor at least at one point. In this way, the interior of the hybrid pump is divided into two separate areas, at the same time can be adapted by the cross-sectional shape of both the elasticity of the rotor blades and their investment on the Gehäuseinnenwandung under bias in wide limits to different operating conditions. It is advantageous if the rotor blades have a blade-shaped curvature and are resiliently deformable in the circumferential direction.

An improved effect on the elastic deformation of the rotor blades can be achieved if, during operation of the hybrid pump in the first region of low speed tribological forces of the fluid to be delivered act on each rotor blade, which deform the rotor blades in the direction of the axis of rotation of the rotor. As a result, despite relatively elastic materials of the rotor blades prevents these create even at relatively low speed to the Gehäuseinnenwandung, since the tribological forces of the fluid to be delivered counteract the elastic deformation under the centrifugal forces due to the rotation of the rotor. Therefore, the limit speed may be relatively high, so that in the operating state of the hybrid pump according to a centrifugal pump and adequate flow rates can be realized. In addition, the operating behavior of the hybrid pump also depends on the conveyed medium because of the deformability of the rotor blades. Low viscosity fluids will be different due to different Toughness set a different deformation of the rotor blades at the same speed as in highly viscous fluids or gases, with the centrifugal force effects play a role.

A conceivable embodiment provides that the rotor blades are made of a plastic material, preferably of thermoplastic materials or polyurethane or EPDM or nitrile or neoprene. Such materials provide sufficient deformability with high dimensional stability even over permanent load. At the same time, such materials are inexpensive to process, for example by means of injection molding and thus to produce the rotor blades or even the whole rotor inexpensively. Also, the running behavior of the hybrid pump is very quiet.

This can be achieved in a first embodiment in that rotor and rotor blades are integrally formed. Here, for example, the rotor and the rotor blades can be shaped simultaneously and integrally in one processing step, for example by means of injection molding or other production methods. As a result, the number of parts of the pump is drastically reduced, which also reduces assembly costs and increased reliability. It is also conceivable in another embodiment that the rotor blades are used from the resilient material in associated recesses of the rotor and fixed thereto. This allows the rotor itself to be made of a different material than the rotor blades, for instance with regard to strength properties or other boundary conditions.

Furthermore, it is advantageous if substantially cylindrical thickenings are arranged on the radially projecting from the rotor ends of the rotor blades, which create a sealing against the inner wall of the housing interior and separate individual cells of the hybrid pump in the operating state corresponding to a vane pump. These thickenings, which in the operating state according to a vane pump subject to a corresponding wear due to the friction on the Gehäuseinnenwandung extend so because of their extensive masses in relation to the rotor blades themselves the life of the rotor, at the same time they form a corresponding for the attacking centrifugal forces Mass distribution and an enlarged contact surface of the rotor blades on the inner wall of the housing interior.

It is advantageous if the eccentricity of the arrangement of the rotor in the range up to 20%, preferably up to 2% of the outer diameter of the rotor including the rotor blades. Such a value for the eccentricity can be bridged without problems with the deformation of the rotor blades and without endangering the strength properties of the rotor blades.

A particularly simple construction of the hybrid pump can be realized if the rotor and the housing consist of essentially disc-shaped basic shapes which can be connected to one another in a fluid-tight manner. As a result, prefabricated components can be mounted simplified, and the fluidic sealing of the individual parts to each other over the large contact surfaces of the individual disk-shaped basic shapes is easy to implement.

Furthermore, it is conceivable that the inlet and / or the outlet of the fluid in the housing interior is perpendicular to the axis of rotation of the rotor of the hybrid pump. In this case, the fluid flows substantially tangentially to the circumference of the rotor blades. In another embodiment, it is also conceivable that the inlet and / or the outlet of the fluid into the housing interior takes place at least with a component parallel to the axis of rotation of the rotor of the hybrid pump.

Furthermore, it is conceivable that a universal motor can be used as the drive of the hybrid pump.

A particularly preferred embodiment of the hybrid pump according to the invention is shown in the drawing.

Figur 1

- einen ersten Schnitt durch eine erfindungsgemäße Hybridpumpe in schematischer Darstellung bei geringer Drehzahl im Betriebszustand entsprechend einer Kreislpumpe,

Figur 2

- einen Schnitt entlang der Linie AB durch die Hybridpumpe gemäß Figur 1,

Figur 3

- einen Schnitt durch eine erfindungsgemäße Hybridpumpe gemäß Figur 1 bei höherer Drehzahl im Betriebszustand entsprechend einer Flügelzellenpumpe,

Figur 4

- eine Variation der erfindungsgemäßen Hybridpumpe gemäß Figur 1 mit schräg zur Rotationsachse des Rotors geneigtem Einlaß,

Figur 5

- eine Ansicht der Hybridpumpe gemäß Figur 4 mit zwei denkbaren Anordnungen des Saugkanals.

Show it:

FIG. 1

a first section through a hybrid pump according to the invention in a schematic representation at low speed in the operating state corresponding to a centrifugal pump,

FIG. 2

a section along the line AB through the hybrid pump according to Figure 1,

FIG. 3

a section through a hybrid pump according to the invention according to FIG. 1 at a higher speed in the operating state corresponding to a vane-cell pump,

FIG. 4

a variation of the hybrid pump according to the invention according to FIG. 1 with an inlet inclined obliquely to the axis of rotation of the rotor,

FIG. 5

- A view of the hybrid pump according to Figure 4 with two conceivable arrangements of the suction channel.

FIG. 1 shows a schematic representation of a section through a hybrid pump 1 according to the invention, wherein the section extends approximately in the dividing plane of the plate-shaped housing 2 of the hybrid pump 1. As a result, the intake duct 10 and the outlet channel 11 and the housing interior 3 can be seen, in which a rotor 5 is mounted rotatably with rotor blades 6 arranged thereon about an axis of rotation 8. The axis of rotation 8 in this case has an eccentric arrangement to the symmetry axis 9 of the housing interior 3, wherein the size of the eccentricity is shown under the item number 14. The arrangement of the axis of rotation 8 and the axis of symmetry 9 and the essential structure of such a hybrid pump 1 is basically known from DE 195 45 045 A1 and should therefore be explained only insofar as is relevant to the present invention.

Unlike the known vane pumps is in the inventive hybrid pump 1, however, that the rotor blades 6 of the rotor 5 in the idle state of the hybrid pump 1 or below a limit speed not or only partially create the inner wall 4 of the housing interior 3. The rotor blades 6 are in this case formed of an elastically deformable material which can deform from the blade-like configuration according to the figure 1 under the action of centrifugal force during rotation of the rotor 5 along the direction of rotation 17 such that the cylindrical thickenings 7 at the ends of Rotor blades 6 move more and more radially outward as the speed increases and during create the rotation over an ever longer circumferential length of the inner wall 4 of the housing interior 3. After exceeding the limit speed, the thickenings 7 of the rotor blades 6 are then in constant contact with the inner wall 4 of the housing interior 3, as can be seen in more detail in FIG.

Under the influence of the centrifugal force, figuratively speaking, the rotor blades 6 spread radially outward from the axis of rotation 8, and more and more contact the inner wall 4. Here, the rotor blades 6 also change their curved cross-sectional shape a little, in that in the regions along the circumferential direction of the Gehäuseinnenwandung 4, which are farther away from the axis of rotation 8 of the rotor 5, the rotor blades 6 in a stretched configuration. In the areas along the circumferential direction of the housing inner wall 4, which are again arranged closer to the axis of rotation 8 of the rotor 5, this elongated configuration will then spring back in and return to the configuration which in this area in FIG. 1 or in FIG recognize.

The material of the rotor blades 6 may consist for example of thermoplastic materials, polyurethanes, EPDM, nitrile or neoprene, such materials having both a relatively large elastic deformability and high strength and low abrasion under load due to frictional contact.

The rotor 5 with the rotor blades 6 arranged thereon is, as can better be seen in FIG. 2, fixed on a drive shaft 13 on which a drive motor (not shown) can be flanged.

The function of the hybrid pump 1 according to the invention can be described as follows in comparison with the combined in the hybrid pump 1 principles of centrifugal pump and vane pump.

A conventional centrifugal pump is not self-priming, so that before starting such a centrifugal pump, a fluid must be introduced into the suction side 10 and through the inlet 12 in the centrifugal pump. If the centrifugal pump is then put into operation, a volumetric flow of the fluid is fed in via the rotor 5 and the rotor blades 6 through the suction side 10 in the inflow direction 15, so that the centrifugal pump does not dry anymore. This volume flow occurs after passing through the housing interior through the pressure side 11 in the outflow 16 again from the centrifugal pump. At relatively low speeds below the limit speed, the hybrid pump according to the invention substantially exhibits these properties, since the rotor blades 6 have no or only a temporary contact with the housing inner wall 4, as in a centrifugal pump.

Due to the eccentric arrangement of the rotor 5 in the hybrid pump 1 according to the invention but at higher speed, as shown in Figure 3 can be better seen by the deformation of the rotor blades 6, the compression chambers 18, wherein the smallest volume is present in the compression chamber V1, the volumes the compression spaces V2, V3 and V4 are always larger, until the volume decreases again from the compression space V5 up to the compression space V8. This results from the change in shape of the rotor blades 6 due to the centrifugal force, a structure and operating condition of the hybrid pump as in a vane pump, when the speed of the rotor 5 exceeds a limit speed, at all rotor blades 6 to the inner wall 4 of the housing interior 3 over the entire circumference create a turn. As a result, the hybrid pump 1 according to the invention is self-priming in this operating state, d. H. it is sucked in the inflow direction 15 within certain limits by itself, so that the interior 3 of the housing 2 can fill by itself with fluid.

Such a behavior, which is basically known from conventional vane pumps, also occurs in the case of the hybrid pump according to the invention, but only when the rotational speed of the rotor 5 rises above a limit value. Previously, the construction of the compression spaces 18 is not guaranteed by the relatively large eccentricity 14 and the initial configuration of the rotor blades 6 in the unloaded state, since the thickenings 7 at the ends of the rotor blades 6 do not create a seal against the inner wall 4 of the housing interior 3, as in Figure 1 is clearly visible. As a result, in this operating state, of which FIG. 1 represents only a state dependent on the rotational speed, delivery of the fluid is not ensured, as in a conventional vane pump. In this operating state, the rotor 5 and the rotor blade 6 however, as in a conventional flow pump according to a centrifugal pump.

Only when the limit rotational speed at which the centrifugal forces on the rotor blades 6 are so great that the ends 7 of the rotor blades 6 apply to the inner wall 4 of the housing interior 3 over the entire revolution, then is the self-priming operation of the hybrid pump 1 corresponding to a vane pump added.

This self-priming property of the hybrid pump 1 according to the invention has the significant advantage that the use of the hybrid pump 1 requires no previous filling of the pump interior, which otherwise must be done either manually or by additional means. Without a user of such a hybrid pump 1 notices this, is sucked in the ventilated state of the hybrid pump 1 fluid in the operating state of the hybrid pump 1 according to a vane pump because the drive motor runs virtually empty and thus reaches a high speed above the limit speed, and then goes the hybrid pump 1 after successful suction automatically in the conveying operation according to a centrifugal pump, which allows high efficiency with low wear. This is always particularly useful when such pumps are only a short time in operation and then put into operation again after a long period of inactivity. Conventional pumps often run empty during this time, so that the appropriate arrangements for filling the pump must be made in advance. Such applications arise, for example, when refilling containers, for example in the refueling of vehicles from appropriate canisters or tons, but also in a variety of other possible applications.

FIG. 4 shows in a sectional view and in the associated FIG. 5 a side view of a corresponding hybrid pump 1 according to the invention, in which the suction channel 10 is not within the plane perpendicular to the axis of rotation of the rotor 5 runs. This makes it possible to make the inflow of the fluid through the suction channel 10 in the inflow 15 either as shown in solid lines in Figure 5 at an angle of eg 45 degrees, which of course is also possible, an inflow 15 'by a dashed lines shown intake passage 10 'substantially parallel to the axis of rotation 8 of the rotor 5 to realize. This may be fluidly interesting for certain applications.

Part number list

1

- Hybrid pump

2

- Casing

3

- Housing interior

4

- Housing inner wall

5

- Rotor

6

- Rotor blade

7

- thickening

8th

- Rotary axis rotor

9

- Symmetry axis housing interior

10

- Suction channel

11

- Pressure channel

12

- inlet

13

- Drive shaft

14

- eccentricity

15

- inflow direction

16

- Outflow direction

17

- Direction of rotation rotor

18

- Compression rooms

Claims (19)

1. Hybrid pump (1) with a casing (2), into which in each case at least one suction connection (10) and one delivery connection (11) issue and in whose essentially circularly surrounded casing inner space (3) is arranged eccentrically a rotor (5) which has on the circumference a number of rotor blades (6) which are spaced apart from one another and at least in portions are arranged radially and which consist of a resiliently elastically deformable material, characterized in that the eccentricity (14) of the rotor (5) in relation to the casing inner space (3) and the elasticity of the rotor blades (6) are selected in such a way that, in a first range of low rotational speed, each rotor blade (6) bears with its radially projecting end region (7) against circumferential portions (4) of the casing inner space (3) not at all or only temporarily in the course of a revolution of the rotor (5), so that the hybrid pump does not operate with a self-priming action whereas, in a second range of higher rotational speed, all the rotor blades (6) bear with their radially projecting end regions (7) against the inner wall (4) of the casing inner space (3) under the influence of centrifugal force essentially during the entire revolution of the rotor (5), so that the hybrid pump operates with a self-priming action.
2. Hybrid pump (1) according to Claim 1, characterized in that the elastic deformability of the rotor blades (6) is selected in such a way that, beyond a defined rotational speed of the rotor (5), the deformation of the rotor blades (6) on account of the centrifugal force compensates the eccentricity (14), so that essentially all the ends (7) of the rotor blades (6) bear simultaneously against the inner wall (4) of the casing inner space (3) and form compression spaces (18), separated from one another, in conformity to a vane-cell pump.
3. Hybrid pump (1) according to either one of Claims 1 and 2, characterized in that each rotor blade (6) has a streamlinedly curved cross-sectional shape, in which, even in the case of a slow rotation of the rotor (5), each rotor blade (6), at least at one point, touches the inner wall (4) of the casing inner space (3) under elastic prestress.
4. Hybrid pump (1) according to one of the preceding claims, characterized in that, in the first range of low rotational speed, the hybrid pump (1) operates solely or predominantly as a flow pump in a similar way to a centrifugal pump.
5. Hybrid pump (1) according to Claim 4, characterized in that the operation of the hybrid pump (1) in the first range of low rotational speed does not permit self-priming of a liquid medium.
6. Hybrid pump (1) according to either one of Claims 4 and 5, characterized in that, during the operation of the hybrid pump (1) in the first range of low rotational speed, tribological forces of the fluid to be conveyed act on each rotor blade (6) and deform the rotor blade (6) in the direction of the axis of rotation (8) of the rotor (5).
7. Hybrid pump (1) according to one of the preceding claims, characterized in that, in the second range of higher rotational speed, the hybrid pump (1) operates solely or predominantly as a positive-displacement pump in a similar way to a vane-cell pump.
8. Hybrid pump (1) according to Claim 7, characterized in that the operation of the hybrid pump (1) in the first range of low rotational speed permits high efficiency.
9. Hybrid pump (1) according to one of the preceding claims, characterized in that the rotor blades (6) have a blade-shaped curvature and are deformable resiliently elastically in the circumferential direction (17).
10. Hybrid pump (1) according to one of the preceding claims, characterized in that the rotor blades (6) are formed from a plastic material, preferably from thermoplastic materials or polyurethane or EPDM or nitrile or neoprene.
11. Hybrid pump (1) according to one of the preceding claims, characterized in that the rotor (5) and rotor blades (6) are produced in one piece.
12. Hybrid pump (1) according to one of Claims 1 to 10, characterized in that the rotor blades (6) consisting of the resiliently elastic material are inserted into assigned recesses of the rotor (5) and are secured to the latter.
13. Hybrid pump (1) according to one of the preceding claims, characterized in that, at those ends of the rotor blades (6) which project radially from the rotor (5), essentially cylindrical thickenings (7) are arranged, which come to bear sealingly against the inner wall (4) of the casing inner space (3) and separate individual cells (18) from one another.
14. Hybrid pump (1) according to one of the preceding claims, characterized in that the eccentricity (14) of the arrangement of the rotor (5) is in the range of up to 20%, preferably of up to 2%, of the diameter of the rotor (5).
15. Hybrid pump (1) according to one of the preceding claims, characterized in that the volumes of the compression spaces (18) vary from a minimum in the region of the suction side (10) through a maximum to a minimum in the region of the delivery side (11) of the hybrid pump (1).
16. Hybrid pump (1) according to one of the preceding claims, characterized in that the rotor (5) and the casing (2) consist of essentially disc-shaped basic forms which are connectable fluidically sealingly to one another.
17. Hybrid pump (1) according to one of the preceding claims, characterized in that the inflow (10) and/or the outflow (11) of the fluid into and/or out of the casing inner space (3) take/takes place perpendicular with respect to the axis of rotation (8) of the rotor (5) of the hybrid pump (1).
18. Hybrid pump (1) according to Claim 17, characterized in that the inflow (10) and/or the outflow (11) of the fluid into and/or out of the casing inner space (3) take/takes place at least with a component parallel to the axis of rotation (8) of the rotor (5) of the hybrid pump (1).
19. Hybrid pump (1) according to one of the preceding claims, characterized in that a universal motor can be used as the drive of the hybrid pump (1).

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