Pump for conveying a medium

Abstract

The invention relates to a pump (1) for conveying a medium, in particular foodstuffs, having at least two conveying blades (2), wherein each of the at least two conveying blades (2) can be driven rotationally about an axis of rotation (4) independently of one another by means of at least one drive element (3) such that the angular speed of the at least two conveying blades (2) changes, wherein the pump (1) has at least one inlet opening (5) and at least one outlet opening (6), preferably in a radial arrangement with respect to the axis of rotation (4), along a conveying chamber (7) of the pump (1) for introducing and / or discharging the medium, wherein the pump (1) has a central chamber (8) which is separated from the conveying chamber (7), wherein the at least two conveying blades (2) are arranged in the conveying chamber (7) of the pump (1), and the at least one drive element (3) is arranged in the central chamber (8) such that the least one drive element (3) is encapsulated with respect to the conveying chamber (7).

Description

[0001]

[0002] Pump for conveying a medium

[0003] The invention relates to a pump for conveying a medium, in particular foodstuffs, with at least two impeller vanes, wherein each of the at least two impeller vanes can be driven independently of one another by means of at least one drive element rotationally about an axis of rotation, so that a change in the angular velocity of the at least two impeller vanes results, wherein the pump has at least one inlet opening and at least one outlet opening, preferably in a radial arrangement to the axis of rotation, along a conveying chamber of the pump for the inlet and / or outlet of the foodstuffs.

[0004] Pumps for conveying media, especially foodstuffs, are already known from the prior art. When conveying foodstuffs, freshness and gentle handling of the media are of paramount importance. In addition to gentle conveyance and the resulting production efficiency, appropriate hygiene and gentle operation to protect the pump are also crucial. Gentle operation is essential, as it minimizes mechanical stress on the medium. This is often particularly important for sensitive media where damage or alteration of consistency is undesirable. The generic patent DE 807 250 discloses a pump for conveying liquids or air using impellers. The pump has a single compartment in which all components, especially the drive elements and the impellers, are arranged together with the medium being conveyed.

[0005] The object of the invention is to improve a device of the type mentioned above in such a way that the drive elements are protected from damage and the food-grade suitability is extended.

[0006] For this purpose, the invention proposes that the pump has a central space separated from the conveying space, wherein the at least two conveying vanes are arranged in the conveying space of the pump and the at least one drive element is arranged in the central space, so that an encapsulation of the at least one drive element from the conveying space results.

[0007] In the present invention, a pump for conveying a medium, in particular foodstuffs, has a conveying chamber separated from the central chamber, wherein this separation allows an arrangement of the conveying vanes in the conveying chamber.

[0008] The term "encapsulation" means a spatial separation of the central space containing the drive elements from the conveying space containing the conveying vanes, allowing them to function and / or exist independently. In other words, it also means that at least one drive element and at least two conveying vanes are located in a separate space. This spatial separation of the central space and conveying space ensures the protection of at least one drive element.

[0009] The drive element can be located in the central chamber, and the pumped medium can be located in the pumping chamber. This can offer the user the advantage of a longer pump lifespan, as no parts of the medium enter the drive element.

[0010] For the sake of completeness, it should be noted that in the course of describing this invention, the numerical terms one, two, three and the like generally only represent the minimum quantity of a feature of the

[0011] Describe the pump according to the invention. Individual features or components of the pump can, of course, also be present in larger numbers. In this sense, for example, the numeral "one" is to be understood, unless otherwise stated, as meaning at least one, etc.

[0012] The term "at least two impeller blades" refers to a component within the pump responsible for setting the medium in motion and transporting it within the pumping chamber. These at least two impeller blades rotate around a single axis.

[0013] The rotary motion ensures that the medium to be conveyed is transported by means of at least two conveying vanes.

[0014] According to the invention, the at least two conveying vanes are designed as a projection on at least one vane disk.

[0015] Preferably, the pump according to the invention has its own impeller disc for each impeller; more preferably, the pump according to the invention has three impeller discs and thus three impellers that can move independently of one another. The term "at least one inlet opening" describes an opening through which the medium to be pumped enters the pump. The term "at least one outlet opening" describes an opening through which the medium to be pumped is transported out of the pump by means of the at least two impellers.

[0016] The term "radial arrangement" refers to an arrangement in which the at least one inlet and the at least one outlet are arranged symmetrically and / or uniformly around a central axis. In other words, it can mean that the at least one inlet and the at least one outlet are located on different radial lines radiating from a common center. However, it is equally conceivable that the at least one inlet and the at least one outlet are arranged at a distance of 90° from each other.

[0017] It may be provided that at least one inlet opening and / or at least one outlet opening has a special valve and / or sealing device that prevents backflow of the medium being conveyed.

[0018] In one embodiment, the pump is a sine wave pump. However, it is quite conceivable that, with appropriate system adjustments, the pump could be a vacuum pump.

[0019] Preferably, the pump is used for conveying media, preferably food products. It is also conceivable that the pump can transport pharmaceutical liquids and / or lotions and / or creams and / or gel-based products in addition to food products. Furthermore, it is preferably intended that the angular velocity is sinusoidal. It is also possible that the angular velocity consists of steep sine curves, resulting in a high volumetric flow rate of the medium in the conveying chamber.

[0020] The pump is preferably designed to have a housing, and / or the housing may form a single unit with the pump. The housing material is advantageously chosen for ease of cleaning. It is conceivable that the housing can be replaced at any time without damage, i.e., reused or replaced.

[0021] The housing may be an integral part of the pump. The housing may preferably have at least one inlet opening and at least one outlet opening. For example, the housing may be designed as a round frame on which the at least one inlet opening and at least one outlet opening are arranged. In addition to the housing, the present invention may include a first housing part and a second housing part. It is particularly preferred that the first housing part and the second housing part are arranged parallel to each other. It is also conceivable that the first housing part and / or the second housing part is fixed or detachably fixed to one side of the housing by means of a connection, preferably a screw connection.

[0022] or are.

[0023] The pump may be designed so that at least two impeller vanes, the pumping chamber, the central chamber, and at least one drive element are arranged within the housing. Preferably, the pumping chamber and the central chamber are arranged separately from each other.

[0024] It is conceivable that the conveying area has at least three sub-areas. The conveying area can therefore have a storage area (also referred to as a retention area), and / or a suction area, and / or a pressure area.

[0025] The suction area can be configured to generate a vacuum by means of the movement of a rotor, which draws the medium to be conveyed into the conveying chamber.

[0026] The storage area can serve for the temporary storage of the pumped medium and can be configured to enable a stable pressure build-up.

[0027] In this context, the pressure zone can be formed as soon as the at least two conveying vanes move towards each other, thus compressing the pressure zone, before the conveyed medium is pumped out of the conveying zone.

[0028] It is therefore conceivable that the at least three sub-sections are not fixed in a specific position within the pumping chamber, but rather shift depending on the position of the at least two impeller vanes. It is thus possible that this rotation of the at least three sub-sections occurs cyclically, whereby the pump, and in particular the pumping section, continuously draws in, stores, and / or discharges the medium to be pumped.

[0029] The drive element may include a motor. This motor could be, for example, an electric motor; preferably, it would be a geared motor. The motor can be replaced by the pump at any time without damage, i.e., it is reusable. Therefore, it is conceivable that the motor could be replaced in case of defects.

[0030] It is possible for at least one drive element to be a drive disc. Preferably, the drive disc can be configured to transmit the mechanical energy generated by the rotational movement of the rotor. It is therefore conceivable that the drive disc transmits the mechanical energy via the at least one drive element to the at least one vane disc, thereby setting the at least two conveying vanes in motion.

[0031] The drive disc can be mounted to rotate about a drive axis, which is offset from a central axis. It should be noted that the drive axis can be parallel to the central axis, perpendicular to the central axis, or at a predetermined axial offset. In other words, the drive disc is axially offset from the pump housing and thus has a different axis than the impeller. It is conceivable that by decreasing or increasing the axial offset of the drive disc to the pump housing, the pressure range within the pumping chamber can be modified.

[0032] It may be provided that at least one drive element has at least one wing disc.

[0033] Particularly preferred are the at least two conveying vanes each formed as a projection on at least one vane disc. It is possible that the at least one vane disc is rotatably mounted about the central axis, and that the at least one vane disc is connected to one of the at least two conveying vanes. It is also conceivable that the at least one vane disc is fixedly connected to one of the at least two conveying vanes or can be detached at any time, preferably non-destructively, i.e., reusably. Thus, it is possible that the at least two conveying vanes can be removed and / or replaced at any time, as needed, and / or in case of defects.

[0034] It is possible that at least one drive element has at least one driver.

[0035] It can be provided that the at least one drive element is connected to the at least one impeller and is guided along the at least one elongated hole of the drive disc. Preferably, the pump can have three impellers, with a conveying impeller arranged on each impeller. It is important to note that each of the at least one impeller can move independently of the others. The invention also includes the possibility that the at least one drive element is arranged on the drive disc and the at least one elongated hole is arranged on the at least one impeller. Preferably, the drive disc or the impeller has three elongated holes.

[0036] It may be provided that at least one of the drive elements is a pin and / or a bolt. Q

[0037] It is conceivable that the angular velocity of the at least two conveying vanes changes depending on the position of the at least one driver within the at least one elongated hole and / or depending on an axial offset of the at least one driver relative to the drive axis. In preferred embodiments, the present invention features a sinusoidal change in the angular velocity of the at least two conveying vanes.

[0038] It is possible that the angular velocity of the at least two conveyor vanes is higher the further the at least one carrier is from the drive axis.

[0039] All parts of the pump, for example, the at least one drive pulley and / or the at least one impeller disc and / or the at least one drive element, can be removed at any time, preferably non-destructively, i.e., reusable. All parts of the pump, for example, the at least one drive pulley and / or the at least one impeller disc and / or the at least one drive element, can be interchangeable.

[0040] Further features and details of preferred

[0041] The various forms of the inventions are explained by way of example in the following figure description. These show:

[0042] Fig. 1: a representation of the pump with a closed housing;

[0043] Fig. 2: a representation of the pump with closed housing and central components;

[0044] Fig. 3: a representation of the pump in a first

[0045] Operating status; 0

[0046] Fig. 4: a representation of central components of the pump according to

[0047] Fig. 3;

[0048] Fig. 5: a representation of the pump in a second

[0049] Operating status;

[0050] Fig. 6: a representation of central components of the pump according to

[0051] Fig. 5;

[0052] Fig. 7: a representation of the rotor angular velocity ω;

[0053] depending on the drive pulley position;

[0054] Fig. 8: a representation of the rotor angular velocity ω as a function of the pump impeller position α.

[0055] Fig. 1 shows a pump 1 for conveying media, especially food.

[0056] Figure 1 shows that a mounting plate 32 is arranged on the motor 14. It further shows that the mounting plate 32 is connected to the second housing part 21 by means of several connecting rods 24 and to the first housing part 20 via several housing tie rods 25. The connecting rods 24 are longitudinally extended and fixed to the individual pins 33 of the mounting plate 32.

[0057] It is conceivable that these housing tie rods 25 and / or connecting rods 24 can be replaced non-destructively, i.e., reused and interchangeable, as needed. The housing 9 is arranged between the first housing part 20 and the second housing part 21. The housing 9 is designed as a round frame. It is possible that the retaining plate 32 is designed as a round plate, i.e., without pins 33.

[0058] It is further evident that the first housing part 20 is connected to the second housing part 21 by means of several housing tie rods 25. Several first screws 34 are arranged on the first outer surface 20a of the first housing part 20, and at least one further screw 35 is arranged on the second outer surface 32a of the mounting plate 32, which can connect the mounting plate 32 to the second housing part 21 and to the housing 9 and to the first housing part 20 via the connecting rods 2 and the housing tie rods 25. It is also possible that the first housing part 20 and the second housing part 21 are each welded to the housing 9 on one side.

[0059] The housing 9, preferably arranged radially, shows the inlet opening 5 and the outlet opening 6. It is conceivable that the medium enters the pumping chamber 7 of the pump 1 through the inlet opening 5 and is pumped out again by the pump 1 through the outlet opening 6. It is conceivable that, for example, a hose or a pipe is attached to the inlet opening 5 and / or the outlet opening 6.

[0060] Fig. 2 shows another view of pump 1.

[0061] Figure 2 shows at least one drive element 3, in particular the motor 14, and the mounting plate 32. It is evident that the mounting plate 32 has several pins 33. The mounting plate 32 has a recess 36 on one pin 33a in which the foot 23 is arranged. A further screw 35 is arranged on each of the other pins 33. The connecting rods 24 are guided through holes in the mounting plate 32 and fixed on the outside 32a with further screws 35. The connecting rods 24 are also guided through holes in the second housing part 21, and thus brought into contact with the second housing part 21.

[0062] Fig. 2 shows that the second housing part 21 is connected to the first housing part 20 via several housing tie rods 25. It is conceivable that by tightening the -The first screws 34 on the first outer surface 20a of the first housing part 20 and the further screws 35 on the second outer surface 32a of the mounting plate 32, using the connecting rods 24 and the housing tension rods 25, press the mounting plate 32 and the second housing part 21 and the housing 9 and the first housing part 20 firmly together. This can mean that when the first screws 34 and the further screws 35 are tightened, the tensile force along the connecting rods 24 and the housing tension rods 25 increases, thereby pressing the second housing part 21 and the housing 9 and the first housing part 20 and the mounting plate 32 firmly together and / or joining them.

[0063] It is also conceivable that the first screws 34 and the further screws 35 can be replaced at any time without damage, i.e., in other words, reusable.

[0064] Fig. 3 shows essential areas of the pump 1. Fig. 3 depicts the pumping chamber 7 with its three sub-sections, in particular the suction section 17, the reservoir section 18, and the pressure section 19. Each sub-section is bounded by at least one impeller 2. The medium enters the pumping chamber 7, specifically the suction section 17, through the inlet opening 5. The medium is transported along the direction of rotation 38.

[0065] Fig. 3 shows that the pump 1 has three impellers 26, 27, 37. It is also conceivable that the angular velocities and the rotor position angles 39, 39b, 39c of the three impellers 26, 27, 37 differ.

[0066] The maximum angular velocity is preferably reached at the first rotor position angle 39 of the first impeller 37. The first impeller 37 can preferably have a first rotor position angle 39 of 180°. It is conceivable that the first impeller 37 rotates about the central axis 12 at the maximum speed. Furthermore, it is possible that the medium can be transported most rapidly in the pump 1, particularly in the pumping chamber 7, along the direction of rotation 38 at the first rotor position angle 39 of the first impeller 37.

[0067] Figure 3 also shows the second conveying vane 26. The second conveying vane 26 preferably has a decreasing angular velocity and a second rotor position angle 39b in the range of 290° to 340°, particularly preferably from 328° to 76°.

[0068] In the position of the second impeller 26, it is conceivable that the rotational speed of at least one impeller disk 13, and thus the speed of the medium in the conveying chamber 7, particularly in the pressure zone 19, decreases along the direction of rotation 38. Furthermore, it is conceivable that the medium from the conveying chamber 7, particularly from the pressure zone 19, is pumped out of the pump 1 through the outlet opening 6.

[0069] Figure 3 also shows the third conveying vane 27. The third conveying vane 27 preferably has an increasing angular velocity and a third rotor position angle 39c in the range of 25° to 40°, preferably 31° or 24°. In the position of the third conveying vane 27, it is conceivable that the rotational speed of at least one vane disk 13 increases again. A new cycle start is possible here.

[0070] Fig. 4 shows the drive disc 10, which rotates around the drive axis 11 in the direction of rotation 38. Furthermore, at least one driver 15, in particular the first driver 40, the second driver 28, and the third driver 29, are shown in Fig. 4. The rotor angle positions 39, 39b, 39c and / or angular velocities of the conveying vanes 26, 27, 36 can correspond to those described in Fig. 3.

[0071] The angular velocity of the respective conveying vanes 2, in particular of the first conveying vane 36 and the second conveying vane 26 and the third conveying vane 3, can be changed depending on the position of the respective carriers 2 within the elongated hole 10.

[0072] Fig. 5 shows a representation of the pump 1 in a second operating state. Fig. 5 shows that the pump 7, in particular the pumping chamber 7, has two pressure zones 19, 19a and a suction zone 17.

[0073] It is possible that pump 1 is in a phase where the medium is compressed both at an earlier and at a later point in the pumping cycle, which is why two pressure ranges 19, 19a can arise. Thus, pressure range 19 can correspond to the point in the pumping cycle at which pump 1 pressurizes the medium during the increasing angular velocity.

[0074] It is therefore conceivable that the third impeller 27 corresponds to an increasing angular velocity at a sixth rotor angle position 39f in the range of 56° and 127°, preferably in the range of 70° and 91.2°. The second pressure zone 19a can then form when the pump 1 exerts pressure on a different volume of the medium at a later point in the pumping cycle. In other words, it is conceivable that the pressure zone 19a has a smaller volume than the pressure zone 19, particularly because the medium is pumped out of the pressure zone 19a through the outlet opening 6.

[0075] Furthermore, it is conceivable that the angular velocity decreases again at a fourth rotor angle position 39d of the first impeller 37. The second impeller 26 is also shown in Fig. 5. The second impeller 26 can have a minimum angular velocity at a fifth rotor angle position 39e in the range of 35° and 325°, preferably 0°, since at this point in the pumping cycle the medium is pumped through the inlet opening 5 into the pump 1, preferably into the conveying chamber 7, and particularly preferably into the suction area 17.

[0076] Fig. 6 shows the information from Fig. 5 and additionally the arrangement of the at least one driver 15, in particular the first driver 40 and the second driver 28 and the third driver 2.9, in the at least one elongated hole 16' of the drive disc 10.

[0077] Fig. 7 shows a diagram of the angular velocity as a function of the positions of the at least one conveying vane 2. It is shown that the at least one conveying vane 2 achieves the maximum angular velocity at a first rotor position angle in the range of 145° and 127°, preferably in the range of 39° and 180°.

[0078] Fig. 8 shows a diagram of the angular velocities as a function of the position of the drive element. Legend 10.

[0079] Regarding the reference numbers:

[0080] Pump 31 Sealing ring Forcier f impeller 32 Mounting plate

[0081] 1 element drives 33 pins

[0082] Rotation axis e 34 First screw Inlet opening 35 Further screw Outlet 1 inlet opening 36 Recess Conveyor chamber 37 First conveying vane Center chamber 38 Direction of rotation Qo i'S-US © 39 Rotor position angle Drive pulley 39b Second drive axis Rotor position angle Center axis 39c Third

[0083] Flights 1 s disc Rotor position angle Motor 39d Fourth drive Rotor position angle Slotted hole 39e Fifth suction area Rotor position angle Stuffing area 39f Sixth pressure area Rotor position angle First housing part

[0084] Second housing part

[0085] Ax ia 1 ver satz

[0086] Foot

[0087] Connecting rod

[0088] Case length

[0089] Second conveyor vane

[0090] Third promoter wing

[0091] Second drive

[0092] Third participant

[0093] First driver

Claims

33088 / 41 / 36 20240917 1.7 Patent claims 1. Pump (1) for conveying a medium, in particular foodstuffs, with at least two impeller blades (2), wherein each of the at least two impeller blades (2) can be driven independently of one another by means of at least one drive element (3) rotationally about an axis of rotation (4), such that a change in the angular velocity of the at least two impeller blades (2) results, wherein the pump (1) has at least one inlet opening (5) and at least one outlet opening (6), preferably in a radial arrangement to the axis of rotation (4), along a conveying chamber (7) of the pump (1) for the inlet and / or outlet of the medium, characterized by that the pump (1) has a central space (8) separated from the pumping space (7), wherein the at least two impellers (2) are arranged in the pumping space (7) of the pump (1) and the at least one drive element (3) is arranged in the central space (8), so that the at least one drive element (3) is encapsulated from the pumping space (7).

2. Pump (1) according to claim 1, wherein the pump (1) has a housing (9) and / or the housing (9) forms a complex with the pump (1).

3. Pump (1) according to claim 2, wherein the at least two conveying vanes (2) and the conveying chamber (7) and the central chamber (8) and the at least one drive element (3) are arranged within the housing (9). 4, Pump (1) according to at least one of the preceding claims, wherein the pumping chamber (7) has at least three sub-areas.

5. Pump (.1 ) according to at least one of the preceding claims, wherein the drive element (3 ) comprises a motor ( 14).

6. Pump (1) according to at least one of the preceding claims, wherein the at least one drive element (3) is a drive disk (10). Pump according to claim 6, wherein the drive disk (10) is rotatably mounted about a drive axis (11), wherein the drive axis (11) is mounted offset to a central axis (12).

8. Pump (1) according to at least one of the preceding claims, wherein the at least one drive element (10) has at least one impeller (13).

9. Pump (1) according to claims 7 and 8, wherein the at least one impeller disk (13 ) is rotatably mounted about the central axis (12 ), wherein the at least one impeller disk (13 ) is connected to one of the at least two conveying impellers (2 ).

10. Pump (1) according to at least one of the preceding claims, wherein the at least one drive element (3 ) has at least one carrier: (15) on it.

11. Pump (1) according to claim 10, wherein the at least one driver (15) is connected to the at least one impeller disk (13) and which is guided along the at least one elongated hole (16) of the one drive disk (10).

12. Pump (1) according to claims 10 and 11, wherein the at least one driver (15) is a pin and / or a bolt.

13. Pump (1) according to at least one of the preceding claims, wherein the angular velocity of the at least two conveying vanes (2) changes depending on the position of the at least one driver (15) within the at least one elongated hole (10) and / or depending on a distance of the at least one driver (15) to the drive axis (11).

14. Pump (1) according to at least one of the preceding claims, wherein the angular velocity of the at least two conveying vanes (2) is higher the further the at least one driver (15) is from the drive shaft (11), 15. Pump (1) according to at least one of the preceding claims, wherein the at least one impeller disk (13 ) with one of the at least two conveying impellers (2 ) is positioned in the conveying chamber (7 ) such that the at least two conveying impellers (2 ) have a distance, preferably of 120°, from each other.

16. Use of a pump (1) according to at least one of claims 1 to 15.

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