EP3282086A1 - Pump, in particular gear pump, for conveying of additives - Google Patents

Abstract

The disclosure relates to a pump, in particular gear pump, for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, comprising a drive unit (10) with a drive for providing a force and / or a torque for pumping the processing aid and a pump unit (11) in which the processing aid is pumpable, wherein the drive unit (10) and the pump unit (11) are releasably, in particular without tools, connected or connectable.

Description

The invention relates to a pump, in particular gear pump, for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry and a method for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry.

Gear pumps for conveying (liquid) substances are known in principle. The substance to be transported is transported in spaces between teeth and a wall surrounding the teeth. However, the use of such gear pumps or similar pumps for conveying materials for the food industry is not without problems, since there high hygiene standards must be met. High standards of purity and / or hygiene also often have to be met in the chemical or pharmaceutical industry.

It is therefore an object of the invention to provide a pump, in particular gear pump, which allows a simple way a clean pumping of the processing aid and in particular meets high hygienic requirements. Furthermore, it is an object of the invention, a to suggest appropriate method for conveying the processing aid and a method for producing a pump, in particular gear pump, for conveying the processing aid, with high hygienic standards to be met in a simple manner.

According to a first aspect of the invention, the object is achieved by a pump, in particular gear pump, for conveying a processing aid (hereinafter also referred to as "substance"), in particular liquid product (substance), preferably for use in the food industry, chemical industry and / or pharmaceutical industry, comprising a drive unit with a drive for providing a force and / or torque for pumping the processing aid and a pump unit in which the processing aid is pumpable, wherein the drive unit and the pump unit releasably, in particular without tools, connected or A basic idea of the invention is therefore to design the drive unit and pump unit such that they (in their entirety) can be connected to each other in a simple manner, in particular without the use of a tool. Preferably, the pump unit need not be disassembled to disengage from the drive unit, but may be removed from the drive unit in its entirety (possibly after release of corresponding connection means such as clamps). In particular, drive unit and pump unit can be designed as modules that can be connected to one another. By separating from the drive unit, the pump unit can be cleaned in a particularly simple manner (for example in a dishwasher). As a result, even high hygiene requirements can be met in a simple manner.

The above object is further, according to a second aspect, in particular by a pump, in particular gear pump, preferably solved according to the first aspect, for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical An industry, comprising a drive unit having a drive for providing a force and / or a torque for pumping the processing aid and a pump unit, in which the processing aid is pumpable, wherein at least one transmission element, in particular, at least one shaft, and / or a coupling part of the pump unit, which / serves the transmission of the driving force of the drive unit, by the processing aid and / or flow around. A core idea here is that a transmission element and / or a coupling part of the (liquid) material through and / or flows around. This means that in the area of the flow or flow, a continuous mass transfer takes place, so that the (liquid) material does not stay for a long time at a certain section. This easily and reliably prevents the formation of germs and the like, such as mold. This also satisfies the hygiene requirements in a reliable and simple manner. In particular, customarily occurring dead spaces into which the substance to be conveyed penetrates, but from which it is not removed again, can be reduced or even completely avoided.

According to a general idea of the invention, a pump, in particular a gear pump, is proposed in which no dead spaces, in particular in the region of gear elements and / or coupling parts, are formed. The above object is achieved according to a third aspect, which can be combined with the first and / or second aspect, in particular by a pump, in particular gear pump, for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical Industrial and / or pharmaceutical industry, comprising a drive unit with a drive for providing a force and / or torque for pumping the processing aid and a pump unit in which the processing aid is pumpable, wherein the pump unit is constructed (at least substantially) dead space-free and / or or dead spaces during operation are continuously umspülbar.

By "flow through" is to be understood in particular that during use of the pump steadily (at least a small part) of the substance flows through the respective part, thus entering at a first end of the part and exiting at a second end. Specifically, a "flow around" is intended to be a flow that flows along a member or part referred to from a first end to a second end (during use of the pump). It should therefore in particular no inflow or infiltration be understood in a dead space, wherein the (liquid) material does not flow. The "flowing through" or "flowing around" thus relates in particular to the stationary state and not to a state in which the pump first receives the (liquid) substance.

In a specific embodiment, drive unit and pump unit are connected to one another by a plug connection or connectable. Preferably, a coupling part (in particular magnetic coupling part) of the pump unit is inserted into a coupling part (in particular magnetic coupling part) of the drive unit. Alternatively or additionally, the drive unit and pump unit can be mounted on each other by an axial relative movement and / or be disassembled from each other. Preferably, drive unit and pump unit are plugged together by an axial relative movement. For example, an end of the pump unit facing the drive unit, for example a corresponding coupling part (for example magnetic coupling part), can be plugged into the drive unit. As a result, the drive and pump unit can be easily connected or detached from each other. In particular, the pump unit can be attached in its entirety to the drive unit (in its entirety) in a simple manner.

Preferably, at least one (detachable, in particular manually operable) locking device is provided. At least one such locking device can lock the pump unit and the drive unit to each other. Alternatively or additionally, at least one such locking device may be provided to lock individual elements of the pump unit (and / or individual elements of the drive unit) to each other. In specific embodiments, the locking device may comprise a clamping device, such as a clamp device and / or a tri-clamp device or generally joint clamping device (joint clip), eg single- and / or double-joint clamping device (two, three or more parts). As a result, the pump unit and drive unit or elements of the pump unit (or drive unit) can be reliably connected to one another. Nevertheless, a fast and reliable assembly and disassembly is guaranteed.

In principle, individual elements of the pump unit (and / or the drive unit), such as a wall element (bottom or cover element) and a main body of the pump unit, releasably, in particular without tools, be connected or connectable. Such a connection may comprise a plug connection and / or be effected by an axial relative movement of the elements to one another. Furthermore, a locking device may be provided, as has already been described in the preceding section. In general, a "relative axial movement" is understood to mean a movement along the main axis of the drive unit, which is usually defined by a rotational axis of a rotating drive. A "main body" is to be understood in particular as meaning all elements of the pump unit (if appropriate apart from a wall or floor or cover element).

Preferably, the pump comprises a (non-contact) coupling, more preferably magnetic coupling, so that a driving force of the drive unit is transferable to the pump unit. In a specific embodiment, the drive unit may have a magnetic coupling part and the pump unit has a corresponding magnetic coupling part. For example, the magnetic coupling part of the drive unit may be bell-shaped or pot-shaped, in which case the magnetic coupling part of the pump unit is received in the magnetic coupling part of the drive unit. Alternatively, the conditions may also be reversed, that is to say in particular the magnetic coupling part of the drive unit can be accommodated or receivable in the magnetic coupling part of the pump unit.

The drive unit may comprise an electric motor, in particular a (preferably brushless) DC motor. Furthermore, the drive unit may have a control device, for example with integrated speed control. Overall, a compact design is achieved.

The pump unit may (at least substantially) be made of steel, in particular stainless steel, and / or plastic (possibly apart from seals, in particular sealing rings and / or sealing lips). According to a general idea, the (entire) pump unit is made of dishwasher-proof material (possibly also seals, such as sealing rings and / or sealing lips).

A drive shaft of a gear (as part of the gear pump) may be formed partially hollow. Furthermore, the driven gear (as part of the gear pump) may be at least partially hollow. In particular, the drive shaft and / or gear are formed so hollow that a fluid connection between the gear and a coupling part, in particular magnetic coupling part of the pump unit can be produced. In a particularly preferred embodiment, both the gear and the drive shaft on an interconnected (axial) bore, in particular so that a fluid connection between a coupling part facing away from the end face of the gear and the coupling part facing the end of the drive shaft (to the coupling part) is realized , As a result, (liquid) material from the coupling part to reach the opposite end of the gear (and thus also to the end of the gear or "under the gear), so that these sections of (liquid) material through or flow around. As a result, dead spaces with corresponding hygienic problems are reliably avoided.

A (pressure-side) line for discharging the (liquid) substance (in particular from the gears of the gear pump) may be connected to a connecting line which branches off from the (pressure-side) line. The connecting line can be designed such that it conveys a part of the (liquid) substance to at least one transmission and / or coupling part, in particular a magnetic coupling part. From the coupling part then, if necessary, the (liquid) material to one of the gears (the gear pump), for example, as described above, be promoted. In particular, for this purpose, the (liquid) material can be conveyed by a drive shaft of the toothed wheel and / or the toothed wheel itself and / or along a circumferential surface of the drive shaft (up to the toothed wheel). Overall, therefore, a circuit of one of the gears back to the gear can be formed, wherein the circuit is a portion of a (pressure side) line for discharging the (liquid) material, a connecting line to the coupling part and connections along and / or through the drive shaft and / or the gear comprises. Overall, dead spaces are thus reliably avoided.

The above object is further achieved by the use of a pump, in particular gear pump, of the type described above, for the Promotion of a (liquid) substance for the production of food. As explained above, such use can easily provide (liquid) substances to the food industry.

Furthermore, the above object is achieved by a method for conveying a processing aid, in particular a liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, wherein the processing material with a pump, in particular gear pump, promoted the type described above becomes. At least one transmission element, in particular at least one shaft and / or a coupling part of the pump unit, which serves to transmit the driving force of the drive unit, can be flowed through and / or flow around the (liquid) substance. For this purpose, part of the (liquid) substance is branched off from a pressure-side line of the pump unit and led to the transmission element and / or the coupling part.

Furthermore, the above object is achieved by a method for producing a pump, in particular gear pump, for conveying a processing aid, in particular a liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, in particular of the type described above, comprising a drive unit with a drive for providing a force and / or a torque for pumping the processing aid liquid and a pump unit in which the processing aid liquid substance is pumpable, wherein the drive unit and the pump unit are stuck together and / or clamped and / or by an axial relative movement are connected ..

By "axial relative movement" is meant in particular a purely translational movement. However, an "axial relative movement" can generally also be achieved by superimposing a rotational movement with a translatory (in the axial direction) movement, for example by turning (eg in a thread) or guiding within a slotted guide.

The (liquid) substance (conveying medium) may be frosting, (vegetable or animal) oil, an emulsion, a fat, in particular fluid fat, or the like.

Further embodiments emerge from the subclaims.

The invention will be described with reference to embodiments, which are explained in more detail with reference to the figures.

Fig. 1

eine Schrägansicht einer ersten Ausführungsform einer erfindungsgemäßen Zahnradpumpe;

Fig. 2

die Zahnradpumpe gemäß Fig. 1 in einer Ansicht von oben;

Fig. 3

einen Schnitt entlang Linie B-B aus Fig. 2;

Fig. 4

einen Schnitt entlang Linie A-A gemäß Fig. 2;

Fig. 5

eine Schrägansicht einer zweiten Ausführungsform der erfindungsgemäßen Zahnradpumpe; und

Fig. 6

einen Schnitt der Ausführungsform gemäß Fig. 5 analog Fig. 4.

Hereby show:

Fig. 1

an oblique view of a first embodiment of a gear pump according to the invention;

Fig. 2

the gear pump according to Fig. 1 in a view from above;

Fig. 3

a section along line BB Fig. 2 ;

Fig. 4

a section along line AA according to Fig. 2 ;

Fig. 5

an oblique view of a second embodiment of the gear pump according to the invention; and

Fig. 6

a section of the embodiment according to Fig. 5 analogous Fig. 4 ,

In the following description, the same reference numerals are used for identical and equivalent parts.

Fig. 1 shows a first embodiment of the gear pump according to the invention in an oblique view. Fig. 2 shows the gear pump according to Fig. 1 in a view from above. FIG. 3 and FIG. 4 show sectional views of the gear pump according to Fig. 1 , The gear pump according to the Fig. 1-4 has a drive unit 10 and a pump unit 11. The drive unit 10 comprises a (brushless) DC motor 12 and a first coupling part 13 (specifically, a clutch bell) which is driven (rotated) by the DC motor 12. The first coupling part 13 is a Magnetic coupling member. The rotational movement of the first coupling part 13 is transmitted via magnetic interaction to a second coupling part 14 (magnetic coupling part). The second coupling part 14 is part of the pump unit 11.

Via a shaft 15, the rotational movement of the second coupling part 14 is transmitted to a first gear 16 of the pump unit 11 (see Fig. 4 ). The first gear 16 in turn (see also Fig. 4 ) transmits its rotational movement to the second gear 17, which is mounted on a corresponding (second) shaft.

In Fig. 3 a pump inlet 18 and a pump outlet 19 of the pump unit 11 can be seen. A suction-side line 20, the gears 16, 17 a (liquid) material is supplied. Via a pressure-side line 21, the (liquid) material is conveyed by the gears 16, 17 in the direction of the pump outlet 19. From the pressure-side line 21 branches off a connecting line 22, which connects the pressure-side line 21 with a portion 23 in which the second coupling part 14 is arranged. A diameter of the connecting line 22 is (clearly) smaller than a diameter of the pressure-side line 21 (for example by a factor of at least 2 or at least 4 smaller). Of the portion 23, is included in the second coupling part 14, the (liquid) material on the one hand by an axial bore 24 (see Fig. 4 ), which leads through the shaft 15 and the first gear 16, to an end 25 of the first gear 16, which faces away from the second coupling part 14, flow. On the other hand, the (liquid) substance may flow on an outer peripheral surface of the shaft 15. As a result, dead spaces are avoided (completely), in particular in the range of rotating parts of the pump unit. At no portion of the pump unit, which may come in contact with the (liquid) material, in particular due to surfaces sliding past each other, this substance "sees".

In addition to the second coupling part 14, the pump unit 11 still has a cover element 26 (see 3 and 4 ) and a main body 27 (to which the second coupling part 14 can also be assigned in another way). In the main body 27, the gears 16, 17 and the lines 20, 21 are arranged.

Main body 27 (including second coupling part 14) may be connected to cover element 26 by a clamping device 28 (tri-clamp system). For this purpose, the lid member 26 is applied to the main body 27. Together cover element 26 and main body 27 form an annular elevation 29, which is fixed by the clamping device 28. The clamp device 28 is via a manually operable actuator 34 (see Fig. 1 ), so that the lid member 26 can be removed from the main body 27 or mounted thereon. Between the cover member 26 and main body 27 (in the region of the annular elevation 29) a sealing ring 30 are arranged.

The pump unit 11 can be plugged in (in the assembled state of the pump unit 11 or in their "entirety"). Specifically, the second coupling part 14 is inserted into the first coupling part 13. After forming this connector, an annular elevation 31, which is formed jointly by pump unit 11 and drive unit 10, a locking of the pump unit 11 to the drive unit 10 take place. For this purpose, a second clamping device 32 (Tri-clamp system) may be provided, which may be the same as the first clamping device 28.

Also, between the pump unit 11 and the drive unit 10 (in the region of the second annular elevation 31), a sealing ring (second sealing ring) 33 may be formed.

The FIGS. 5 and 6 show a second embodiment of the gear pump according to the invention. This embodiment corresponds to the first embodiment, wherein the differences from the first embodiment will be explained below.

In contrast to the first embodiment, the second embodiment eliminates the first clamp device. Furthermore, the main body 27 (at least partially) in the lid member 26 of the second embodiment (see Fig. 6 ). The lid member 26 according to the second embodiment is (in contrast to the first embodiment) not (essentially) as a plate, but cup-shaped. In general, the main body 27 can be plugged into the lid member 26 (in sections). The annular protrusion 31 does not become in the second embodiment formed by the main body 27 and drive unit 10, but by cover member 26 and drive unit 10. Overall, a comparatively simple structure is achieved in the second embodiment, which requires only one locking device, namely the second clamping device 32.

It should be noted at this point that all the above-described parts taken alone and in any combination, in particular the details shown in the drawings, are claimed as essential to the invention. Variations thereof are familiar to the person skilled in the art.

Bezuaszeichenliste

10

drive unit

11

pump unit

12

DC motor

13

First coupling part

14

Second coupling part

15

wave

16

First gear

17

Second gear

18

pump inlet

19

pump output

20

(Suction side) line

21

(Pressure side) line

22

connecting line

23

section

24

Axial bore

25

The End

26

cover element

27

main body

28

Schell facility

29

Ring-shaped elevation

30

seal

31

Ring-shaped elevation

32

Second clamp device

33

seal

34

actuator

Claims (15)

Pump, in particular gear pump, for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, comprising a drive unit (10) with a drive for providing a force and / or a torque for pumping the processing aid and a pump unit (11) in which the processing aid is pumpable, wherein the drive unit (10) and the pump unit (11) are detachably, in particular without tools, connected or connectable. Pump, in particular gear pump, preferably according to claim 1, for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, comprising a drive unit (10) having a drive for providing a force and / or a torque for pumping the processing aid and a pump unit (11) in which the processing aid is pumpable, wherein at least one transmission element, in particular at least one shaft (15), and / or a coupling part (14) of the pump unit (11), / that serves to transmit the driving force of the drive unit (10), can be flowed through and / or flowed around by the processing aid. Pump, in particular gear pump, preferably according to claim 1 or 2, for conveying a processing aid, in particular liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, comprising a drive unit (10) with a drive for providing a force and / or a torque for pumping the processing aid and a pump unit (11) in which the processing aid is pumpable, wherein the pump unit is constructed at least substantially dead space free or dead spaces during operation are continuously rinsed. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
Drive unit (10) and pump unit (11) connected to each other by a plug connection or connectable and / or
Drive unit (10) and pump unit (11) by an axial relative movement to each other to each other mounted and / or disassembled from each other. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
at least one detachable, preferably manually operable, locking device is provided in order to lock the pump unit and the drive unit to one another and / or individual elements of the pump unit to one another,
wherein the locking device preferably comprises a clamping device (28, 32), such as a clamp device and / or a tri-clamp device. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
individual elements of the pump unit (11), such as a wall element (26) and a main body (27), releasably, in particular without tools, connected or connectable. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
a drive force of the drive unit (10) via a non-contact coupling (13, 14), in particular a magnetic coupling, to the pump unit (11) is transferable. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
the drive unit (10) comprises an electric motor, in particular a preferably brushless DC motor. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
the pump unit (11) is made at least substantially of steel, in particular stainless steel, and / or of plastic. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
a drive shaft (15) of a toothed wheel (16) and / or the driven toothed wheel (16) itself is hollow at least in sections, in particular such that a fluid connection between toothed wheel (16) and a coupling part (14), in particular magnetic coupling part of the pump unit (11 ) is made. Pump, in particular gear pump, according to one of the preceding claims,
characterized in that
a pressure-side line (21) for discharging the processing aid and a connecting line branching off from this pressure-side line (21) are provided, wherein the connecting line conveys a part of the processing aid to at least one transmission and / or coupling part (14), in particular a magnetic coupling part. Use of a pump, in particular gear pump, according to one of the preceding claims, for conveying a liquid substance for the production of foodstuffs. Method for conveying a processing aid, in particular a liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, wherein the processing aid is conveyed by a pump, in particular gear pump according to one of the preceding claims 1 to 11. Method according to claim 13,
characterized in that
at least one transmission element, in particular at least one shaft (15), and / or a coupling part (14) of the pump unit (10), which serves to transmit the driving force of the drive unit, by the processing aid is flowed through and / or flows around, preferably to a part of the processing aid is branched off to a pressure-side line (21) and fed to the gear element and / or the coupling part (14). Method for producing a pump, in particular a gear pump, for conveying a processing aid, in particular a liquid product, preferably for use in the food industry, chemical industry and / or pharmaceutical industry, in particular according to one of claims 1 to 11, comprising a drive unit (10) with a drive for providing a force and / or a torque for pumping the processing aid and a pump unit (11) in which the processing aid is pumpable, wherein the drive unit (10) and the pump unit (11) connected to each other and / or clamped be and / or connected by an axial relative movement.

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