EP4048893B1 - Conveying device at least for conveying a fluid, and pump having such a conveying device - Google Patents

Description

State of the art

The invention relates to a conveying device at least for conveying a fluid and a pump with such a conveying device.

Out of DE 10 2017 104400 A1 a conveying device is already known at least for conveying a fluid, the already known conveying device having at least one conveying chamber, at least one conveying chamber element which at least partially delimits the conveying chamber, which is designed to be dimensionally stable, and at least one elastically deformable, in particular annular, conveying element which, together with the conveying space element limits the conveying space and is arranged on the conveying space element. Furthermore, from the DE 10 2017 104400 A1 A pump with such a conveying device is already known.

Further are out US 2,885,966 and US 3,922,119 conveying devices are already known at least for conveying a fluid, the conveying devices having at least one conveying space, at least one conveying chamber element which at least partially delimits the conveying chamber and which is designed to be dimensionally stable, at least one elastically deformable conveying element which, together with the conveying chamber element, delimits the conveying chamber and is arranged on the conveying chamber element is, and comprise at least one pressing unit which is intended to generate an inhomogeneous pressing force at least in a sealing region between the conveying element and the conveying space element along a maximum overall extent of the sealing region.

Out of WO 2016 / 173 798 A1 a pump is known, wherein an elastically deformable pump ring 14 is inhomogeneously compressed in the circumferential direction by an eccentric drive. Also US 2,885,966 A shows a pump with an elastically deformable ring membrane, which is inhomogeneously circumferentially rotated by a cam rotating inside the ring membrane is deformed. EP 2 733 355 A1 describes a pump with an annular, elastic delivery membrane, the delivery chamber being formed by an annular groove in a housing over which the delivery membrane is placed so that it can be expanded and moved in the radial direction.

The object of the invention is, in particular, to provide a generic conveying device and/or pump with improved properties with regard to an advantageous conveying function. The object is achieved according to the invention by the features of claim 1, while advantageous refinements and developments of the invention can be found in the subclaims.

Advantages of the invention

The invention is based on a conveying device at least for conveying a fluid, with at least one conveying chamber, with at least one conveying chamber element that at least partially delimits the conveying chamber, which is designed to be dimensionally stable, with at least one elastically deformable, in particular annular, conveying element, in particular conveying membrane, which together with the conveying space element delimits the conveying space and is arranged on the conveying space element, and with at least one pressing unit which, in particular at least in a conveying-free state of the conveying element, is provided for this purpose, at least in a sealing region between the conveying element and the conveying chamber element along a maximum overall extent of the sealing region , in particular along a maximum circumferential extent between the conveying element and the conveying space element, to generate an inhomogeneous contact pressure.

It is proposed that the pressing unit is designed such that, in particular at least in a conveying-free state of the conveying element, the conveying element has an inhomogeneous compression along the maximum overall extent of the sealing area, in particular along a maximum circumferential extent of the annular conveying element, the conveying element being formed by the Pressing unit, in particular due to a geometric design a pressing surface of a pressing element of the pressing unit, is compressed to varying degrees along the maximum overall extent of the sealing area, in particular along the maximum circumferential extent of the annular conveying element. Preferably, the pressing unit is provided to generate an inhomogeneous contact pressure distribution along a sealing line of the conveying element, in particular along a circumferential direction of the conveying element. Preferably, an inhomogeneous contact pressure is generated as a result of a special geometric configuration of a contact surface of a pressure element and/or a special geometric configuration of a sealing extension of the conveying element. In particular, a configuration or a course/distribution of the inhomogeneous contact pressure depends on maximum force peaks or maximum load peaks along the sealing line, which result in the delivery of a fluid, in particular
Compression is distributed by means of an interaction of the conveying element and the conveying space element through the action of a drive unit of a pump comprising the conveying device. Preferably, the pressing unit is designed such that the sealing extension of the conveying element is compressed to different degrees at different positions along the conveying element or the sealing line, in particular as a result of an interaction of at least the pressing unit, in particular at least one pressing element of the pressing unit, and the sealing extension. The conveying element can have an elongated, in particular elongated, configuration or an annular configuration. A basic mode of operation of the pressing unit in relation to the generation of an inhomogeneous pressing force or to an inhomogeneous compression along the sealing line is preferably independent of a shape of the conveying element itself. The conveying element can be designed as a flat conveying membrane, as an annular conveying membrane or as another conveying membrane that appears sensible to a person skilled in the art, such as a plate-shaped or disk-shaped conveying membrane or the like. A geometric configuration of the contact surface and a geometric configuration of the one that interacts with the contact surface Sealing extensions are preferably responsible for generating an inhomogeneous contact force or for an inhomogeneous compression along the sealing line. The sealing extension is preferably arranged on a conveying side of a base body of the conveying element. Preferably, the conveying side of the base body is arranged on a side of the base body facing away from an activation side of the base body. In particular, the conveying side forms an outside of the base body. The activation side preferably forms an inside of the base body. At least one activation extension of the conveying element is preferably arranged on the activation side. The activation extension is preferably provided for cooperation with a transmission element of a drive unit of a pump comprising the conveying device, in particular with at least two transmission elements of the drive unit. The transmission element(s) is/are preferably arranged on a drive element of the drive unit of the pump comprising the conveying device. The base body preferably has an annular configuration. The base body preferably has a slotted annular configuration. In particular, when viewed in a plane, in particular in a plane at least substantially perpendicular to one, the base body points Drive axis of the drive unit plane, a cross-sectional shape, which essentially consists of a circular arc or an open ring, which extends along an angular range of less than 360 ° and in particular of more than 90 °, and two transverse to the circular arc or to the open ring extending inlet and/or outlet extensions which directly adjoin the circular arc or the open ring, in particular in end regions of the circular arc or the open ring. The activation extension is preferably arranged in the area of a circular arc or a ring course of the base body on the base body, in particular on an inside of the base body. A maximum longitudinal extent of the activation extension is in particular at least 5%, preferably by 10% and very particularly preferably at least 20% smaller than a maximum longitudinal extent of the base body. Preferably, the activation extension extends at least substantially along an overall extent of the circular arc or the open ring of the base body, in particular up to end regions of the circular arc or the open ring, at which an inlet and/or outlet extension of the base body is arranged. Preferably, the activation extension extends along an angular range, in particular of less than 360°, preferably of less than 350° and particularly preferably of more than 180° on the activation side.

Advantageously, the conveying element, in particular the conveying membrane, can be moved away from a counter surface of the conveying chamber element as a result of the action of a driving force acting in a direction facing away from the activation side, in particular can be lifted off from the counter surface, in particular to generate a negative pressure in the conveying chamber. Preferably, as a result of a movement of the conveying element, in particular the conveying membrane, a negative pressure can be generated away from the counter surface, which is in particular smaller than -0.1 bar, preferably smaller than -0.2 bar and particularly preferably smaller than -0.3 bar, in particular based on an atmospheric pressure surrounding the conveying device. An advantageous conveyance of a conveying means into the conveying space of the conveying device, which is at least partially limited by the counter surface and the conveying surface, can be achieved.

Preferably, the conveying element, in particular the conveying membrane, can be driven by means of the drive unit in such a way that a conveying means, in particular a fluid, is conveyed according to a traveling wave principle (see, for example, the disclosure of EP 1 317 626 B1 ) is possible. The drive unit can be used as a mechanical drive unit, as a magnetic drive unit, as a piezoelectric drive unit, as a hydraulic drive unit, as a pneumatic drive unit, as an electric drive unit, as a magnetorheological drive unit, as a carbon tube drive unit, as a combination of one of the mentioned types of drive units or as another , be designed as a drive unit that appears sensible to a specialist. The drive unit preferably has at least the drive element which is intended to act on the conveying element, in particular the conveying membrane. However, it is also conceivable that the drive unit has a number of drive elements other than one, which are intended to act on the conveying element. Preferably, the drive element is intended to cause an elastic deformation of the conveying element, in particular the conveying membrane, as a result of the action of a driving force on the conveying element, in particular the conveying membrane. The drive element can have any configuration that appears sensible to a person skilled in the art, such as a configuration as a plunger, an extension, an engagement ring, a hook, a gripping element or the like. The drive element is preferably designed as an eccentric shaft. Preferably, the eccentric shaft can be driven in rotation by means of a motor unit of a pump, which includes the conveying device, in a manner already known to a person skilled in the art. The motor unit can be designed as an electric motor unit, as an internal combustion engine unit, as a hybrid motor unit or the like. The drive element preferably has an axis of rotation. The axis of rotation preferably runs transversely, in particular at least substantially perpendicular to a main conveying direction of the conveying chamber, along which a fluid can be conveyed through the conveying chamber. The expression “substantially perpendicular” is intended to define in particular an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, in particular viewed in a projection plane, enclose an angle of 90° and the angle has a maximum deviation of in particular less than 8° , advantageously smaller than 5° and particularly advantageously smaller than 2°.

The conveying space of the conveying device is preferably limited by the base body of the conveying element and the conveying space element. The conveying space of the conveying device is preferably limited by the conveying surface and the counter surface opposite the conveying surface. The delivery space element is preferred dimensionally stable. The conveying space element preferably has a preload, in particular in order to apply a force to the conveying element in the direction of the pressing unit. Preferably, the conveying element, in particular the conveying membrane, is designed to be resilient. “Resilient” is intended to mean, in particular, a property of an element, in particular of the conveying element, which is intended in particular to generate a counterforce that is dependent on a change in the shape of the element and is preferably proportional to the change and which counteracts the change. The conveying element, in particular the conveying membrane, is preferably repeatedly deformable, in particular without the conveying element, in particular the conveying membrane, being mechanically damaged or destroyed. Preferably, the conveying element, in particular the conveying membrane, in particular after a deformation, independently strives towards a basic shape again, in particular a convexly curved basic shape with respect to the counter surface, in particular a zero position, of the conveying element, in particular the conveying membrane. Preferably, the resilient configuration of the conveying element, in particular the conveying membrane, can be at least partially influenced and/or brought about by means of a, in particular geometric, configuration of the base body and/or by means of an arrangement of the conveying element, in particular the conveying membrane, on the conveying space element having the counter surface. The conveying element, in particular the conveying membrane, is preferably arranged on the conveying chamber element having the counter surface in such a way that a fluid is conveyed in and/or through the conveying chamber as a result of a dent in the conveying element, in particular the conveying membrane. After the effect of a driving force on the conveying element, in particular the conveying membrane, has been canceled to convey a fluid, the conveying surface of the conveying element, in particular the conveying membrane, preferably at least essentially automatically, in particular as a result of the spring-elastic design, again becomes convexly curved in relation to the counter surface Arrangement to. The conveying element, in particular the conveying membrane, is preferably formed from a rubber-like and/or rubber-like material. However, it is also conceivable that the conveying device, in particular the conveying membrane, is formed from another material that appears sensible to a person skilled in the art or from a combination of several materials, which enables a resilient design of the conveying element, in particular the conveying membrane . The conveying element, in particular the conveying membrane, preferably uses a “bulging effect”. Delivery of a fluid in and/or through the delivery space. The conveying element, in particular the conveying surface, can preferably be dented at least temporarily to convey a fluid, with at least one dent being displaceable, in particular rollingly displaceable, along the conveying surface to convey a fluid. “Provided” is intended to mean, in particular, specially set up, specially designed and/or specially equipped. The fact that an element and/or a unit is/are intended for a specific function should be understood in particular to mean that the element and/or the unit fulfills/fulfills this specific function in at least one application and/or operating state and/or execute/executes.

A “conveyor-free state” is intended to mean, in particular, a state of the conveying surface, in particular viewed in at least a partial area of the conveying surface, in which the conveying surface is in an undeformed state, in particular in a state of the conveying surface that is maximally spaced from a counter surface, and in particular in at least a portion of the conveying surface is decoupled from the action of a driving force to conveying a conveying means by means of the conveying surface. The conveying element preferably has an inhomogeneous compression at different positions of the sealing region along the maximum overall extent of the sealing region, in particular along a maximum circumferential extent of the annular conveying element, as a result of a design of the pressing unit, in particular as a result of a geometric configuration of the pressing surface. The conveying element is compressed to varying degrees by the pressing unit, in particular as a result of a geometric configuration of the pressing surface, along the maximum overall extent of the sealing area, in particular along a maximum circumferential extent of the annular conveying element. By means of the embodiment according to the invention, a contact pressure distribution can be achieved along a sealing line between the conveying space element and the conveying element, which is particularly advantageously adapted to a load caused by conveying a fluid. A sealing function adapted to a load can advantageously be achieved. Reliable delivery of a fluid can be achieved particularly advantageously. A reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. Efficient delivery of a fluid can advantageously be realized.

Furthermore, it is proposed that the pressing unit has at least one pressing element, in particular at least one clamping ring, wherein the conveying element is annular and, in particular the sealing extension of the conveying element, is pressed against an inner circumference of the annular conveying space element by means of the pressing element, in particular along the maximum overall extent of the Sealing area is pressed against the delivery chamber element to varying degrees. The pressing element causes a pressing force on the conveying element that runs at least substantially parallel to the axis of rotation of the drive element. “Substantially parallel” is to be understood here in particular as an alignment of a direction relative to a reference direction, in particular in a plane, with the direction having a deviation from the reference direction, in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°. The pressing element preferably causes a further pressing force on the conveying element, which extends transversely, in particular at least substantially perpendicularly, to the axis of rotation of the drive element. In particular, the pressing element comprises a circumferential collar for generating a pressing force on the conveying element, which runs essentially parallel to the axis of rotation of the drive element. Preferably, the pressing unit comprises at least two pressing elements, in particular at least two clamping rings, by means of which the conveying element, in particular the sealing extension of the conveying element, is pressed against the inner circumference of the annular conveying chamber element, in particular being pressed to different degrees against the conveying chamber element along the maximum overall extent of the sealing region. The conveying element is preferably arranged between the at least two pressing elements within the conveying space element. By means of the design according to the invention, a multi-dimensional pressing effect on the conveying element can advantageously be realized. A reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. Efficient delivery of a fluid can advantageously be realized. Reliable delivery of a fluid can be achieved particularly advantageously.

In addition, it is proposed that the pressing unit has at least one, in particular the previously mentioned, pressing element, in particular at least one clamping ring, wherein the conveying element has at least one, in particular the previously mentioned, sealing extension and wherein the pressing element has the Sealing extension, in particular at least along a circumferential direction of the delivery space element, is pressed against the delivery space element, in particular with an inhomogeneous contact pressure along the circumferential direction. Preferably, a main direction of action of the inhomogeneous contact pressure is oriented transversely, in particular at least substantially perpendicular, to the axis of rotation of the drive element. By means of the design according to the invention, a reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. Efficient delivery of a fluid can advantageously be realized. Reliable delivery of a fluid can be achieved particularly advantageously.

Furthermore, it is proposed that the pressing unit has at least one pressing element, in particular at least one clamping ring, which has a pressing surface which has a varying level, in particular a varying distance, along a maximum longitudinal extent of the pressing surface, in particular along a circumferential direction of the pressing element to a surface facing away from the pressing surface, in particular an inner surface, of the pressing element. The varying level of the pressing surface is preferably formed by a different curvature along an overall course of the pressing surface, in particular along a circumferential direction extending in a plane extending at least substantially perpendicular to the axis of rotation of the drive element. However, it is also conceivable that the varying level of the pressure surface is formed by different maximum heights of elevations in the pressure surface, in particular along the circumferential direction extending in the plane extending at least substantially perpendicular to the axis of rotation of the drive element. It is also conceivable that the varying level of the pressing surface is formed by different maximum thicknesses of an edge, in particular a collar, of the pressing element, on which the pressing surface is arranged on the pressing element on a side arranged on the conveying element. Further configurations of the contact surface that appear sensible to a person skilled in the art to realize the varying level of the contact surface are also conceivable. By means of the design according to the invention, a multi-dimensional pressing effect on the conveying element can advantageously be realized. A reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. It can be advantageous to efficiently convey a fluid will be realized. Reliable delivery of a fluid can be achieved particularly advantageously.

Furthermore, it is proposed, in particular alternatively or additionally, that the conveying element has at least one, in particular the sealing extension already mentioned above, which is pressed onto an inner circumference of the annular conveying space element by means of the pressing unit and which extends along a, in particular along a circumferential direction of the conveying element, maximum longitudinal extent of the sealing extension has varying maximum strength. Preferably, the maximum strength is formed by a maximum extent, in particular a maximum height, of the sealing extension, in particular viewed along a direction that is at least substantially perpendicular to the conveying surface. However, it is also conceivable that the maximum strength of the sealing extension is formed by a maximum extension of the sealing extension starting from the conveying surface, in particular viewed along a direction that is at least substantially perpendicular to the conveying surface. By means of the embodiment according to the invention, a high effect of the pressing unit can advantageously be achieved, in particular as an alternative or in addition to the effect of the pressing element. A multi-dimensional pressing effect on the conveying element can advantageously be realized. A reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. Efficient delivery of a fluid can advantageously be realized. Reliable delivery of a fluid can be achieved particularly advantageously.

In addition, it is proposed that the pressing unit has at least one, in particular the previously mentioned, pressing element, in particular at least one clamping ring, and at least one further pressing element, in particular at least one further clamping ring, wherein the conveying element is annular and by means of the pressing element and the other Pressing element is pressed against an inner circumference of the annular conveying space element, the pressing element and the further pressing element being arranged on the conveying element on sides of the conveying element facing away from it. The conveying element is preferably arranged, in particular viewed along the axis of rotation of the drive element, between the pressing element and the further pressing element, in particular within of the delivery space element. By means of the design according to the invention, a large contact force of the conveying element on the conveying space element can advantageously be achieved. An advantageous effect of the pressing unit can be achieved. A multi-dimensional pressing effect on the conveying element can advantageously be realized. A reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. Efficient delivery of a fluid can advantageously be realized. Reliable delivery of a fluid can be achieved particularly advantageously.

Furthermore, it is proposed that the conveying space element has at least one groove, in particular a sealing groove, which runs in particular along an inner circumference of the annular conveying space element, into which at least one sealing extension of the, in particular annular, conveying element is pressed by means of a pressing element, in particular a clamping ring, of the pressing unit , wherein a compression of the sealing extension is inhomogeneous along a maximum longitudinal extent of the sealing extension, in particular along a circumferential direction of the conveying element. Alternatively or in addition to a varying level of the contact surface and/or the varying thickness of the sealing extension, it is also conceivable that the sealing groove has a varying level, in particular to achieve an inhomogeneous contact pressure along the sealing line. By means of the design according to the invention, an advantageous effect of the pressing unit can be achieved. A multi-dimensional pressing effect on the conveying element can advantageously be realized. A reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. Efficient delivery of a fluid can advantageously be realized. Reliable delivery of a fluid can be achieved particularly advantageously.

In addition, a pump with at least one conveying device according to the invention is proposed. Preferably, the pump is for use in a food sector, in a chemical sector, in a pharmaceutical sector, in particular for batch-based use, in a vivarium sector (aquarium, etc.), in a household machine sector, in a dental hygiene sector, in an automotive sector, in a medical sector , in a water treatment area or the like.

By means of the embodiment according to the invention, reliable delivery of a fluid can be achieved particularly advantageously. A reliable seal can advantageously be achieved. Leakage can be advantageously counteracted. Efficient delivery of a fluid can advantageously be realized. Advantageously, a contact pressure distribution can be achieved along a sealing line between the delivery space element and the delivery element, which is particularly advantageously adapted to a load caused by the delivery of a fluid.

Furthermore, it is proposed that the pump comprises at least one, in particular the previously mentioned, drive unit, which has at least one, in particular the previously mentioned, drive element, in particular at least one eccentric shaft, which is driven by the delivery chamber element, the delivery element and the pressure unit, in particular viewed along a circumferential direction running around a drive axis of the drive unit, is largely surrounded. Preferably, the drive unit, in particular at least the drive element, is completely surrounded by the conveying space element, the conveying element and the pressing unit, in particular viewed along the circumferential direction running around the drive axis of the drive unit. By means of the design according to the invention, a compact and powerful pump can advantageously be realized. A high level of service friendliness can advantageously be achieved, especially since the conveyor device as a whole can be removed from a housing together with the drive unit. Funding can be realized.

The pump according to the invention and/or the conveying device according to the invention should not be limited to the application and embodiment described above. In particular, the pump according to the invention and/or the conveying device according to the invention can have a number of individual elements, components and units that deviate from the number mentioned herein in order to fulfill a function of operation described herein. In addition, in the value ranges specified in this disclosure, values lying within the stated limits should also be considered disclosed and can be used in any way.

drawings

Further advantages result from the following drawing description. An exemplary embodiment of the invention is shown in the drawings. The drawings, description and claims contain numerous features in combination. The person skilled in the art will also expediently consider the features individually and combine them into further sensible combinations.

Show it:

Fig. 1

a pump according to the invention with a conveying device according to the invention in a schematic representation,

Fig. 2

the pump according to the invention with an opened housing in a schematic representation,

Fig. 3

a sectional view through the pump according to the invention in a schematic representation,

Fig. 4

a further sectional view through the pump according to the invention in a schematic representation,

Fig. 5

the conveying device according to the invention in a state removed from the housing of the pump in a schematic representation,

Fig. 6

a conveying element of the conveying device according to the invention in a schematic representation,

Fig. 7

a conveying space element of the conveying device according to the invention in a schematic representation,

Fig. 8

a partial sectional view through the conveying element and the conveying space element in a schematic representation,

Fig. 9

a pressing element of a pressing unit of the conveyor device according to the invention in a schematic representation and

Fig. 10

a fluid supply adapter or a fluid discharge adapter of the conveying device according to the invention in a schematic representation.

Description of the exemplary embodiment

Figure 1 shows a pump 10 with at least one conveying device 12 for conveying at least one fluid (not shown in detail here). The conveying device 12 is provided at least for conveying a fluid, in particular as a result of an action of a drive unit 16 of the pump 10 on the conveying device 12, in particular on an elastically deformable conveying element 22 of the conveying device 12. The conveying device 12 comprises at least one conveying chamber 18, at least one The conveying chamber 18 is at least partially delimited by the conveying chamber element 20, which is designed to be dimensionally stable, and at least the elastically deformable, in particular annular, conveying element 22, which, together with the conveying chamber element 20, delimits the conveying chamber 18 and is arranged on the conveying chamber element 20 (cf. Figure 4 ). The conveying element 22 is preferably designed as a conveying membrane. The delivery space element 20 is formed at least to a large extent, in particular completely, from a plastic, in particular from an injection-molded plastic. However, it is also conceivable that the conveying space element 20 is formed from another material that would appear useful to a person skilled in the art. The conveying element 22 is preferably formed at least to a large extent, in particular completely, from a rubber, in particular a synthetic rubber, such as EPDM, FKM, NBR or the like. However, it is also conceivable that the conveying element 22 is made of another material that would appear useful to a person skilled in the art.

The pump 10 comprises at least the drive unit 16 for acting on the conveying device 12 and at least one housing 14 for accommodating the conveying device 12. The drive unit 16 preferably comprises at least one drive element 24 for acting on the conveying device 12 (cf. Figure 4 ). The drive element 24 is preferably designed as an eccentric shaft. However, it is also conceivable that the drive element 24 has another configuration that appears sensible to a person skilled in the art, such as a rotationally symmetrical shaft on which at least one eccentric is arranged to act on the conveyor device 12 or the like. The drive element 24 can be directly , in particular non-rotatable, or indirectly, such as by means of a gear unit or by means of at least one gear element, with a drive shaft of a motor unit (not shown here), such as an electric motor, an internal combustion engine, one Pneumatic motor or the like. The drive element 24 has an axis of rotation 26 which runs transversely, in particular at least substantially perpendicular, to a main conveying direction along which a fluid can be conveyed through the conveying space 18.

Preferably, the conveying device 12 is at least largely, in particular completely, arranged within the housing 14. The housing 14 surrounds the conveying device 12 at least to a large extent, in particular completely. In particular, the housing 14 is intended, in a manner known to a person skilled in the art, to at least partially, in particular completely, enclose and/or store the conveying device 12 and/or the drive unit 16 of the pump 10. The housing 14 can be made of a plastic, of a metal, of a combination of plastic and metal or of another material that appears sensible to a person skilled in the art. The housing 14 can have a shell design, a pot design, a combination of a shell design and a pot design, or another design that appears sensible to a person skilled in the art.

The housing 14 is designed at least separately from the conveying space element 20 of the conveying device 12, in particular from the conveying device 12 as a whole, in particular in such a way that the conveying space element 20, in particular the conveying device 12, can be removed as a whole from the housing 14. Preferably, the conveying chamber element 20, in particular the conveying device 12, can be removed as a whole from the housing 14 after dismantling an upper housing part 36, in particular together with the conveying element 22 arranged on the conveying chamber element 20. The conveying device 12 is preferably decoupled from dismantling individual parts of the conveying device 12 can be removed as a whole from the housing 14, in particular after dismantling the upper housing part 36 of the housing 14. The housing 14 surrounds at least the conveying space element 20, in particular the conveying device 12, along an at least substantially perpendicular to a drive axis 70 of the drive unit 16 Planar circumferential direction at least to a large extent, in particular in a state of the conveyor device 12, in particular the conveyor device 12 as a whole, arranged in the housing 14.

Viewed along a direction transverse to the drive axis 70 of the drive unit 16, the conveying space element 20 is arranged at least between the housing 14 and the conveying element 22 of the conveying device 12, in particular directly adjacent to the housing 14 or directly adjacent to the housing 14 (cf. Figure 2 ). The conveyor device 12 surrounds the drive unit 16 at least essentially completely, at least in a state of the conveyor device 12 arranged in the housing 14, in particular along a circumferential direction which extends in a plane that extends at least essentially perpendicular to the drive axis 70 of the drive unit 16. The conveying chamber element 20 has an outside which, when the conveying device 12 is arranged on the housing 14, is connected in a force-fitting and/or form-fitting manner to an inside of the housing 14, in particular resting on the inside of the housing 14, preferably directly. In a state of the conveying device 12, in particular the conveying device 12 as a whole, arranged in the housing 14, the outside of the conveying space element 20 preferably rests at least partially on the inside of the housing 14, in particular at least on an inside of a lower housing part 72 of the housing 14. Preferably more than 30%, preferably more than 40%, particularly preferably less than 95% and very particularly preferably between 40% and 60% of a total outer surface of the outside of the delivery chamber element 20 is on the inside of the housing 14, in particular on the inside of a lower housing part 72 of the housing 14. The housing 14 preferably comprises a recess in which the conveying device 12 can be arranged, in particular arranged. The recess of the housing 14, in particular the lower housing part 72, is preferably delimited by a collar-like extension in the interior of the housing 14, in particular the lower housing part 72. The collar-like extension extends over less than 360°, in particular to enable an inlet and outlet region of the conveyor device 12 to be arranged in the housing 14, in particular in the lower housing part 72.

Furthermore, the housing 14 comprises at least one receptacle 32, in particular at least two receptacles 32, 34, for a receptacle of at least one fluid supply adapter 28 and/or a fluid discharge adapter 30 of the conveying device 12. The fluid supply adapter 28 is preferably intended for a connection to a fluid line, in particular in order to realize a supply of fluid to the delivery chamber 18. The fluid drainage adapter 30 is preferably one Connection to a fluid line is provided, in particular to realize a discharge of fluid from the delivery chamber 18. The receptacle(s) 32, 34 is/are preferably arranged in the upper housing part 36 of the housing 14 (cf. Figures 1 and 3 ). However, it is also conceivable that the receptacle(s) 32, 34 is/are arranged in another component of the housing 14, such as in the lower housing part 72 or the like. Preferably, the fluid supply adapter 28 and/or the fluid discharge adapter 30 is connected to the receptacle(s) 32, 34 by means of a positive and/or non-positive connection, in particular fixed to the receptacle(s) 32, 34. For example, the receptacle(s) 32, 34 comprise/comprise an internal thread on one inside for fixing the fluid supply adapter 28 and/or the fluid discharge adapter 30 on the housing 14, in particular on the upper housing part 36 (cf. Figure 3 ). However, it is also conceivable that the fluid supply adapter 28 and/or the fluid discharge adapter 30 is arranged on the receptacle(s) 32, 34 by means of a, in particular thread-free, positive connection, such as by means of insertion into the receptacle(s) 32, 34 , in particular secured, are/is. The receptacle/s 32, 34 extend/extend from an outside of the housing 14, in particular of the upper housing part 36, continuously to an inside of the housing 14, in particular of the upper housing part 36. The receptacle/s 32, 34 is/are preferably as Through opening(s) are formed from the outside to the inside of the housing 14. The fluid supply adapter 28 and/or the fluid discharge adapter 30 extend/extends in a state of the conveying device 12 arranged in the housing 14, starting from the conveying chamber element 20 at least to the outside of the housing 14, in particular beyond, preferably in a connected state of a connecting piece 38 of the conveying chamber element 20 with the fluid supply adapter 28 and/or in a connected state of a, in particular further, connecting piece 40 of the delivery chamber element 20 with the fluid discharge adapter 30 (cf. Figure 3 ).

The connecting piece 38 and/or the, in particular further, connecting piece 40 are/is, in particular each, arranged on at least one transverse extension 60, 62 of the delivery space element 20, in particular formed in one piece with the corresponding transverse extension 60, 62 (cf. Figures 2 , 3 , 5 and 7 ). In particular, the delivery space element 20, viewed in a plane, in particular in an at least substantially perpendicular to a rotation axis 26 of the drive element 24, in particular to the drive axis 70 of the drive unit 16, a cross-sectional shape, which essentially consists of a circular arc or an open ring, which extends along an angular range of less than 360 ° and in particular of more than 90 °, and the two transverse transverse extensions 60, 62 extending to the circular arc or to the open ring, which directly adjoin the circular arc or the open ring, in particular in end regions of the circular arc or the open ring. The connecting piece 38 and/or the, in particular further, connecting piece 40 have/has, in particular each, a main extension axis 64, 66 which is transverse, in particular at least substantially perpendicular, to a main extension plane of the at least one transverse extension 60, 62, in particular of the respective one Transverse process 60, 62 runs. Preferably, the main extension axis(es) 64, 66 of the connecting piece 38 and/or the, in particular further, connecting piece 40 run transversely, in particular at least substantially perpendicularly, to the main conveying direction of the conveying chamber 18, along which a fluid can be conveyed through the conveying chamber 18. Preferably, the main extension axis(es) 64, 66 of the connecting piece 38 and/or the, in particular further, connecting piece 40 run at least substantially parallel to the plane that is at least substantially perpendicular to the axis of rotation 26 of the drive element 24. The connecting piece 38 and the, in particular further, connecting piece 40 are arranged differently, in particular oppositely, aligned on the side facing away from the conveying element 22, in particular on the outside, of the conveying space element 20. Preferably, the connecting piece 38 and the, in particular further, connecting pieces 40 extend from the outside of the delivery space element 20 in different, in particular opposite, directions. Preferably, the connecting piece 38 and the, in particular further, connecting piece 40 extend from the outside of the delivery space element 20 in directions facing away from the delivery space element 20, the directions being aligned in opposite directions.

The connecting piece 38 and/or the, in particular further, connecting pieces 40 are/is arranged at a distance relative to an inner wall of the housing 14, in particular at least of the upper housing part 36 and/or the lower housing part 72, in a state of the conveying device 12 arranged in the housing 14, particularly viewed along the main extension axis(es) 64, 66 of the Connection piece 38 and/or the, in particular, further connection piece 40 (cf. Figures 2 and 3 ). Preferably, the connecting piece 38 and/or the, in particular further, connecting piece 40 are/is along an entire circumference of the connecting piece 38 and/or the, in particular further, connecting piece 40 in a state of the conveying device 12 arranged in the housing 14 relative to the inner wall of the housing 14, in particular relative to an inside of the upper housing part 36 and / or to an inside of the lower housing part 72, arranged at a distance. In particular, a minimum distance of the connecting piece 38 and/or the, in particular further, connecting piece 40 relative to the inner wall of the housing 14, relative to the inside of the upper housing part 36 and/or to the inside of the lower housing part 72, is greater than 0.001 mm, preferably greater than 0. 01 mm, particularly preferably larger than 0.1 mm and very particularly preferably smaller than 10 mm. Preferably, the minimum distance of the connecting piece 38 and/or the, in particular further, connecting piece 40 relative to the inner wall of the housing 14, in particular relative to the inside of the upper housing part 36 and/or to the inside of the lower housing part 72, has a value from a value range of 0.1 mm to 5 mm. However, it is also conceivable that the connecting piece 38 and/or the, in particular further, connecting piece 40 in an alternative embodiment of the pump 10 on the inner wall of the housing 14, in particular on the inside of the upper housing part 36 and/or on the inside of the lower housing part 72 , rests, in particular in a state of the conveying device 12 arranged in the housing 14 on the inner wall of the housing 14, in particular on the inside of the upper housing part 36 and / or on the inside of the lower housing part 72.

The delivery chamber element 20 comprises at least the connecting piece 38 for the fluid supply adapter 28, in particular designed differently from a hose, and/or at least the, in particular further, connecting piece 40 for the fluid discharge adapter 30, in particular designed differently from a hose, which is connected to one of the The side facing away from the conveying element 22, in particular on the outside, of the conveying chamber element 20 is/are arranged (cf. Figures 2 , 3 , 5 and 7 ). The fluid supply adapter 28 and/or the fluid discharge adapter 30 are/is preferably tubular. The fluid supply adapter 28 and/or the fluid discharge adapter 30 preferably has/has a conically extending insertion end 44, 46 (cf. Figures 3 and 10 ). The introductory 44, 46 des The fluid supply adapter 28 and/or the fluid discharge adapter 30 is arranged in the connecting piece 38 or in the, in particular further, connecting piece 40 when the fluid supply adapter 28 and/or the fluid discharge adapter 30 is arranged on the delivery chamber element 20. Preferably, the fluid supply adapter 28 and/or the fluid discharge adapter 30 comprises a coupling end 48, 50 for a connection to a supply line or to a discharge line to a supply line or a discharge line of a fluid from or into the delivery chamber 18. It is also conceivable that the fluid supply adapter 28 and/or the fluid discharge adapter 30 are/is intended to be connected to other components that appear useful to a person skilled in the art, such as fluid coupling pieces, hose nozzles or the like. The coupling end 48, 50 is arranged on a side of the fluid supply adapter 28 or the fluid discharge adapter 30 facing away from the insertion end 44, 46. The fluid supply adapter 28 and the fluid discharge adapter 30 preferably have an at least essentially identical design. However, it is also conceivable that the fluid supply adapter 28 and the fluid discharge adapter 30 are at least partially designed differently from one another, such as in an embodiment of a functional unit 58 or the like.

The conveying device 12 comprises at least one functional unit 58, in particular a filter unit and/or a valve unit, and the fluid supply adapter 28 and/or the fluid discharge adapter 30, wherein the functional unit 58 is at least partially, in particular completely, in the fluid supply adapter 28 and/or in the fluid discharge adapter 30 is arranged (cf. Figures 2 , 3 and 10 ). Preferably, the functional unit 58 is at least partially, in particular completely, firmly integrated into the fluid supply adapter 28 and/or in the fluid discharge adapter 30 or at least partially, in particular completely, arranged interchangeably in the fluid supply adapter 28 and/or in the fluid discharge adapter 30. The functional unit 58 can, for example, have one, in particular two, filter and/or valve cartridge(s) which is/are arranged in the fluid supply adapter 28 or in the fluid discharge adapter 30. Other configurations or arrangements of the functional unit 58 that appear sensible to a person skilled in the art are also conceivable, such as an arrangement between the connecting piece 38 and the fluid supply adapter 28 or between the, in particular further, connecting piece 40 and the fluid discharge adapter 30 or the like.

The fluid supply adapter 28 and/or the fluid discharge adapter 30 are/is arranged removably on the housing 14, in particular on the upper housing part 36, and/or on the delivery chamber element 20. The pump 10 comprises at least one securing unit 42 for securing the fluid supply adapter 28 and/or the fluid discharge adapter 30 on the housing 14, in particular on the upper housing part 36, by means of a positive and/or non-positive connection. The securing unit 42 preferably comprises one, in particular two, external threads, which is/are arranged in particular on an outside of the receptacle(s) 32, 34 (cf. Figure 1 ). It is conceivable that the securing unit 42 comprises at least one, in particular two, screw cap(s) (not shown in detail here), which cooperates with the external thread(s) to secure the fluid supply adapter 28 and/or the fluid discharge adapter 30 on the housing 14 / cooperate, in particular clamp a collar of the fluid supply adapter 28 and / or the fluid discharge adapter 30. Alternatively or additionally, the securing unit 42 preferably comprises at least the internal thread(s) arranged on the receptacle(s) 32, 34. Furthermore, it is conceivable that the securing unit 42 alternatively or additionally includes further components that appear useful to a person skilled in the art to secure the fluid supply adapter 28 and/or the fluid discharge adapter 30 on the housing 14, in particular on the upper housing part 36, by means of a positive and/or non-positive fit Connection includes, such as a locking ring, a locking pin or the like.

The conveying device 12 comprises at least one movement compensation unit 52, which is intended to at least partially compensate for and/or dampen relative movements between the fluid supply adapter 28 and the connecting piece 38 in a connected state of the connecting piece 38 with the fluid supply adapter 28 and/or in a connected state of the, in particular further, connecting piece 40 with the fluid drainage adapter 30 to at least partially compensate for and/or dampen relative movements between the fluid drainage adapter 30 and the, in particular further, connecting piece 40 (cf. Figure 3 ). The movement compensation unit 52 preferably comprises at least one damping element 54, in particular at least two damping elements 54, 56. The damping element(s) 54, 56 is/are preferably designed as an O-ring. However, it is also conceivable that the damping element(s) 54, 56 have a different configuration that appears sensible to a person skilled in the art, such as, for example Elastomeric disk, as an elastomeric hollow cylinder or the like. Preferably, the damping element(s) 54, 56 is/are arranged between the connecting piece 38 and the fluid supply adapter 28 or between the, in particular further, connecting piece 40 and the fluid discharge adapter 30. In particular, the damping element(s) 54, 56 lies on an inside of the connecting piece 38 and on an outside of the insertion end 44 of the fluid supply adapter 28 or on an inside of the, in particular further, connecting piece 40 and on an outside of the insertion end 46 of the fluid discharge adapter 30 on. Preferably, the damping element(s) 54, 56, in particular in addition to movement damping, provide a fluidic seal between the connecting piece 38 and the fluid supply adapter 28 or a fluidic seal between the, in particular further, connecting piece 40 and the fluid discharge adapter 30 intended.

The conveying element 22 comprises at least one, in particular at least essentially annular, base body 76 (cf. Figures 3 and 6 ), which is elastically deformable and has at least one conveying surface 78 which is arranged on a conveying side of the base body 76. Furthermore, the conveying element 22 preferably comprises at least one activation extension 80, in particular a plurality of activation extensions 80, for a connection to at least one transmission element 82 of the drive unit 16, which is on an activation side of the base body 76 with the activation extension 80, in particular with the multiplicity of activation extensions 80, cooperate. Preferably, the conveying side of the base body 76 is arranged on the base body 76 on a side of the base body 76 facing away from the activation side of the base body 76. In particular, the conveying side forms an outside of the base body 76. The activation side preferably forms an inside of the base body 76. The activation side in particular forms at least partially an inner surface of the base body 76. The activation extension 80, in particular the activation extensions 80, is/are in particular in one piece with the base body 76 educated. However, it is also conceivable that the activation extension 80, in particular the activation extensions 80, is/are designed separately from the base body 76 and is/are fixed to the base body 76 by means of a form-fitting and/or non-positive connection that appears sensible to a person skilled in the art.

The activation extension 80, in particular the activation extensions 80, is/are designed as a form-fitting and/or force-fitting element(s), which is/are at least used to transmit a driving force acting in a direction away from the activation side by means of a form-fitting and/or force-fitting connection, in particular by means of a non-material, positive and/or non-positive connection, with which the transmission element 82 cooperates/cooperate. The activation extension 80, in particular the activation extensions 80, is preferably clamped between two transmission elements 82, in particular transmission rings, which are arranged on the drive element 24 (cf. Figure 4 ). The activation extension 80, in particular the activation extensions 80 together, has/have a maximum longitudinal extent that is smaller than a maximum longitudinal extent of the base body 76, in particular viewed along a circumferential direction running around the drive axis 70 of the drive unit 16.

When viewed in a plane, in particular in a plane that is at least substantially perpendicular to the drive axis 70, the base body 76 preferably has a cross-sectional shape which essentially consists of a circular arc or an open ring and two inputs running transversely to the circular arc or to the open ring. and/or outlet processes. The circular arc or the open ring of the cross-sectional shape of the base body 76 preferably extends along an angular range of less than 360° and in particular of more than 90°. The inlet and/or outlet extensions of the cross-sectional shape of the base body 76, which run transversely to the circular arc or to the open ring, are preferably arranged directly adjacent to the circular arc or the open ring, in particular in end regions of the circular arc or the open ring. The activation extension 80, in particular the activation extensions 80, preferably extend/extend along a closed circular ring, wherein the activation extension 80, in particular the activation extensions 80, can themselves form the circular ring. A maximum extension of the activation extension 80 along a central axis of the base body 76 or a total extension of the plurality of successive activation extensions 80 along the central axis of the base body 76 is in particular at least 5%, preferably at least 10% and very particularly preferably at least 20% smaller than a maximum Longitudinal extension of the base body 76. The activation extension 80 or the several successive activation extensions preferably extends 80 together along an angular range in particular of more than 270°, preferably of less than 360° or of 360° on the activation side.

The conveying space element 20 surrounds the conveying element 22 along a circumferential direction, at least to a large extent, in particular in a plane extending at least substantially perpendicular to the drive axis 70 of the drive unit 16 (cf. Figures 3 and 5 ). The delivery space element 20 is designed in a ring shape. Preferably, the conveying space element 20 and the conveying element 22, particularly viewed in the plane extending at least substantially perpendicular to the drive axis 70 of the drive unit 16, have an at least essentially analogous shape. In particular, the conveying space element 20 and the conveying element 22, in particular the base body 76 of the conveying element 22, have a basic shape that resembles a Greek capital letter Omega, wherein preferably the extensions of the conveying space element 20 and the conveying element 22 are compared to extensions of the Greek capital letter Omega are angled at 90°.

The conveying space element 20 has a counter surface 74 which cooperates with the conveying surface 78 of the conveying element 22 to convey a fluid, which faces the conveying element 22 and has at least one elevation 84, 86 directed in the direction of the conveying element 22 (cf. Figures 4 , 7 and 8 ). The counter surface 74 preferably comprises at least two elevations 84, 86 directed in the direction of the conveying element 22. The elevation(s) 84, 86 extend/extend, viewed along the circumferential direction, along an at least substantially entire, in particular circular arc-shaped, inside of the conveying space element 20 Preferably, the elevation(s) 84, 86 extend along the inside of the delivery chamber element 20, starting from one of the transverse extensions 60, 62, along the circular arc or the open ring to the other of the transverse extensions 60, 62.

The conveying element 22, in particular the base body 76, has the conveying surface 78, which, when viewed in a cross section of the conveying element 22, in particular in a cross section of the conveying space 18, has a maximum transverse extent which is at least essentially, in particular completely, a maximum transverse extent of the Counter surface 74 of the delivery space element 20 corresponds (cf. Figures 4 and 8th ). The conveying surface 78 is used to convey a fluid into and/or through the conveying space 18 as a result of the action of a driving force that can be generated by the drive unit 16, it can be applied to the counter surface 74 of the conveying space element 20, in particular completely. The counter surface 74 of the conveying space element 20 has, when viewed in a cross section of the conveying space element 20, at least three successive circular arc sections. The circular arc sections form the counter surface 74. Two of the three circular arc sections form the elevations 84, 86 of the counter surface 74 and are arranged on the outside. One of the three circular arc sections forms a depression and is arranged on the inside, in particular between the elevations 84, 86. It is conceivable that the three circular arc sections have different or the same radii.

The conveying chamber element 20 has at least one connection region, in particular arranged on the inside of the conveying chamber element 20, in particular at least one connecting groove, preferably sealing groove 88, into which at least one edge region of the conveying element 22, in particular an extension, preferably a sealing extension, arranged on the edge of the conveying element 22 90, of the conveying element 22, engages in a state arranged on the conveying space element 20, in particular engages in a sealing manner (cf. Figures 4 and 8th ). The conveying element 22 has at least the sealing extension 90, which is formed in one piece with the base body 76 of the conveying element 22 and is at least partially arranged in the sealing groove 88 of the conveying chamber element 20 when the conveying element 22 is arranged on the conveying space element 20. The sealing groove 88 is designed in such a way that there is a flat contact between the sealing extension 90 and an edge region 92 of the delivery chamber element 20 delimiting the sealing groove 88. The sealing groove 88 and the edge region 92 of the conveying chamber element 20 delimiting the sealing groove 88, which is arranged on a side of the sealing groove 88 facing the conveying surface 78 of the base body 76 of the conveying element 22, are designed in such a way that the sealing extension 90 is in flat contact with the sealing groove 88 delimiting edge region 92 of the delivery space element 20 and on a groove base 94 of the sealing groove 88. The sealing groove 88 extends completely around the counter surface 74 of the conveying chamber element 20, which cooperates with the conveying surface 78 of the base body 76 of the conveying element 22 to convey a fluid, and delimits the counter surface 74. The sealing groove 88 preferably extends on the transverse extensions 60, 62 of the delivery space element 20 around an inlet or outlet opening in the respective transverse extension 60, 62 and merges, in particular seamlessly, into the annular inside of the delivery space element 20, in particular to limit the counter surface 74. The sealing groove 88 preferably extends along an entire inner edge region of the conveying space element 20. The conveying space element 20 has the counter surface 74, which extends over the at least three, in particular, to interact with the conveying surface 78 of the base body 76 of the conveying element 22 to convey a fluid viewed in a cross section, extends successive circular arc sections, with at least the edge region 92 of the delivery space element 20 delimiting the sealing groove 88 being arranged, in particular directly, adjacent to at least one, in particular an outer, of the three circular arc sections.

The sealing extension 90 extends completely around the conveying surface 78 of the base body 76 of the conveying element 22 and delimits the conveying surface 78. The sealing extension 90 preferably extends along an entire outer circumference of the base body 76. The sealing extension 90 preferably extends around the inlet and/or Outlet extensions of the base body 76 and merges, in particular seamlessly, into the annular basic shape of the base body 76, in particular in order to limit the conveying surface 78. The sealing extension 90 preferably has a transition region to an edge region of the base body 76 of the conveying element 22, which has a cross section that is different from a cross section of a further transition region of the sealing extension 90 to the conveying surface 78 of the base body 76 (cf. Figure 8 ).

Furthermore, the conveying device 12 comprises at least one pressing unit 96, which has at least one pressing element 98, 100, in particular at least one clamping ring, which is intended to apply a pressing force to the sealing extension 90 in the direction of the conveying chamber element 20 and to press the sealing extension 90 at least in the To compress the area of the sealing groove 88 (cf. Figures 4 , 5 and 9 ). The sealing extension 90 extends across the conveying surface 78 along a direction transverse, in particular at least substantially perpendicular, to the conveying surface 78 of the base body 76 of the conveying element 22. The pressing unit 96 is provided, in particular at least in a conveying-free state of the conveying element 22, at least in a sealing region 102 between the conveying element 22 and the conveying space element 20 along a maximum overall extent of the sealing region 102, in particular along a maximum circumferential extent between the conveying element 22 and the conveying space element 20 to generate an inhomogeneous contact pressure. The sealing area 102 is preferably formed by an interaction of the sealing groove 88 and the sealing extension 90. The sealing area 102 is preferably formed by a contact surface between the sealing extension 90 and the sealing groove 88. The pressing unit 96 is preferably intended to generate an inhomogeneous contact pressure distribution along a sealing line of the conveying element 22, in particular along a circumferential direction of the conveying element 22. The sealing line is preferably formed by the sealing extension 90.

Preferably, the pressing unit 96 is designed such that, in particular at least in a conveying-free state of the conveying element 22, the conveying element 22 has an inhomogeneous compression along the maximum overall extent of the sealing region 102 or the sealing line, in particular along a maximum circumferential extent of the annular conveying element 22. The pressing unit 96 has at least one pressing element 98, 100, in particular at least one clamping ring, wherein the conveying element 22 is annular and is pressed against an inner circumference of the annular conveying space element 20 by means of the pressing element 98, 100. The pressing unit 96 preferably comprises at least two pressing elements 98, 100, in particular two clamping rings, between which the conveying element 22 is arranged within the conveying space element 20. Preferably, the conveying element 22 can be pressed onto the inner circumference of the annular conveying space element 20 by means of the pressing elements 98, 100. In particular, the sealing extension 90 is pressed into the sealing groove 88 by the action of the pressing element 98, 100 on the conveying element 22. The pressing unit 96 has at least the pressing element 98, 100, in particular at least the clamping ring, wherein the conveying element 22 has at least the sealing extension 90 and wherein the pressing element 98, 100 attaches the sealing extension 90, in particular at least along a circumferential direction of the conveying space element 20, to the conveying space element 20, in particular with an inhomogeneous contact force along the circumferential direction. The pressing unit 96 has at least the pressing element 98, 100, in particular at least the clamping ring, which has a pressing surface 104 which has a varying level along a maximum longitudinal extent of the pressing surface 104, in particular along a circumferential direction of the pressing element 98, 100, in particular a varying distance relative to a surface facing away from the pressure surface 104, in particular an inner surface, of the pressure element 98, 100. The varying level of the pressure surface 104 is preferably formed by different maximum heights of the pressure surface 104 along the circumferential direction. Examples are in Figure 9 three different positions 106, 108, 110 on the pressing element 98 are indicated by dashed lines, at which the pressing surface 104 is provided to produce different degrees of compression of the sealing extension 90. In particular, the pressing surface 104 has different maximum heights at the three different positions 106, 108, 110, which can be formed in a variety of ways, such as by changing a maximum strength of the pressing element 98 at the three positions 106, 108, 110 in comparison to other positions of the pressing element 98, by changing a geometric course of the pressing surface 104 on a side of the pressing element 98 facing the conveying element 22 or in another manner that appears sensible to a person skilled in the art. For example, the sealing extension 90 is compressed to different degrees as a result of the varying level at positions 106, 108, 110. At position 106, the sealing extension 90 is compressed, for example, by in particular more than 10%, preferably by more than 15%, preferably by more than 20% and very particularly preferably by more than 22% of a maximum strength 68 of the sealing extension 90. At position 108, the sealing extension 90 is compressed, for example, by in particular more than 5%, preferably by more than 10%, preferably by more than 15% and most preferably by more than 19% of the maximum strength 68 of the sealing extension 90. At position 110, the sealing extension 90 is compressed, for example, by in particular more than 4%, preferably by more than 8%, preferably by more than 14% and very particularly preferably by more than 16% of the maximum strength 68 of the sealing extension 90.

The pressing unit 96 has at least the pressing element 98, in particular at least the clamping ring, and at least one further pressing element 100, in particular at least one further clamping ring, wherein the conveying element 22 is annular and is applied to an inner circumference of the by means of the pressing element 98 and the further pressing element 100 annular conveying space element 20 is pressed, the pressing element 98 and the further pressing element 100 being arranged on the conveying element 22 on sides of the conveying element 22 facing away from it. Preferably the pressing element 98 and the further pressing element 100 of the pressing unit 96 have an at least essentially analogous configuration. The pressing element 98 and the further pressing element 100 are arranged mirror-symmetrically on the conveying chamber element 20, in particular in order to press the conveying element 22 onto the conveying chamber element 20 and to press the sealing extension 90 into the sealing groove 88. The conveying space element 20 has at least the groove, preferably the sealing groove 88, which runs in particular along an inner circumference of the annular conveying space element 20, into which at least the sealing extension 90 of the, in particular annular, conveying element 22 is inserted by means of the pressing element 98, in particular the clamping ring, and/or of the further pressing element 100 of the pressing unit 96 is pressed in, a compression of the sealing extension 90 being inhomogeneous along a maximum longitudinal extent of the sealing extension 90, in particular along a circumferential direction of the conveying element 22. Alternatively or in addition to a varying level of the pressing surface 104 of the pressing element 98 and/or the further pressing element 100, it is conceivable that the conveying element 22 has at least the sealing extension 90, which is pressed onto an inner circumference of the annular conveying space element 20 by means of the pressing unit 96 and one has varying maximum thickness 68 along the maximum longitudinal extent of the sealing extension 90, in particular along a circumferential direction of the conveying element 22. Further configurations of the pressing unit 96 that appear sensible to a person skilled in the art to produce an inhomogeneous compression of the sealing extension 90 along the circumferential direction in the sealing area 102 are also conceivable.

Claims (8)

1. Conveying device at least for conveying a fluid, having at least one conveying chamber (18), having at least one conveying chamber element (20) which at least partially delimits the conveying chamber (18), and is designed to be dimensionally stable, and having at least one elastically deformable, in particular annular, conveying element (22), in particular a conveying diaphragm, which delimits the conveying chamber (18) together with the conveying chamber element (20) and is arranged on the conveying chamber element (20), and with at least one pressing unit (96) which, in particular at least in a non-conveying state of the conveying element (22), is intended to generate an inhomogeneous contact pressure at least in a sealing region (102) between the conveying element (22) and the conveying chamber element (20) along a maximum overall extension of the sealing region (102),

   the pressing unit (96) being designed in such a way that, in particular at least in a non-conveying state of the conveying element (22), the conveying element (22) has an inhomogeneous compression along the maximum overall extension of the sealing region, the conveying element (22) being compressed to different degrees along the maximum overall extension of the sealing region (102) by the pressing unit (96), in particular as a result of a geometric configuration of a pressing surface (104) of a pressing element (98, 100) of the pressing unit (96),

   characterised in that the pressing unit (96) has at least one pressing element (98, 100), in particular at least one clamping ring, which has a pressing surface (104) which has a varying distance relative to an inner surface of the pressing element (98, 100) facing away from the pressing surface (104) along a maximum longitudinal extension of the pressing surface (104) extending in the circumferential direction of the pressing element (98, 100).
2. Conveying device according to claim 1, characterised in that the conveying element (22) and the conveying chamber element (20) are each annular in shape and are pressed against an inner circumference of the annular conveying chamber element (20) by means of the pressing element (98, 100).
3. Conveying device according to claim 1 or 2, characterised in that the conveying element (22) has at least one sealing extension (90) and wherein the pressing element (98, 100) presses the sealing extension (90), in particular at least along a circumferential direction of the conveying chamber element (20), against the conveying chamber element (20), in particular with a pressing force which is inhomogeneous along the circumferential direction.
4. Conveying device according to one of the preceding claims, characterised in that the conveying chamber element (20) is of annular design, and the conveying element (22) has at least one sealing extension (90) which is pressed against an inner circumference of the annular conveying chamber element (20) by means of the pressing unit (96) and has a maximum thickness (68) which varies along a maximum longitudinal extent of the sealing extension (90), in particular along a circumferential direction of the conveying element (22).
5. Conveying device according to one of the preceding claims, characterised in that the pressing unit (96) has the at least one pressing element (98), in particular at least one clamping ring, and at least one further pressing element (100), in particular at least one further clamping ring, the conveying element (22) being annular in design and being pressed against an inner circumference of the annular conveying chamber element (20) by means of the pressing element (98) and the further pressing element (100), the pressing element (98) and the further pressing element (100) being arranged on the conveying element (22) on sides of the conveying element (22) facing away from each other.
6. Conveying device according to one of the preceding claims, characterised in that the conveying chamber element (20) has at least one groove, in particular a sealing groove (88), which extends in particular along an inner circumference of the annular conveying chamber element (20) and into which at least one sealing extension (90) of the, in particular annular, conveying element (22) is pressed by means of the at least one pressing element (98, 100), in particular a clamping ring, of the pressing unit (96), a compression of the sealing extension (90) being inhomogeneous along a maximum longitudinal extension of the sealing extension (90), extending in particular along a circumferential direction of the conveying element (22).
7. Pump with at least one conveying device according to one of the preceding claims.
8. Pump according to claim 7, characterised by at least one drive unit (16) comprising at least one drive element (24), in particular at least one eccentric shaft, which is substantially surrounded by the conveying chamber element (20), the conveying element (22) and the pressing unit (96), in particular viewed along a circumferential direction extending around a drive axis (70) of the drive unit (16).

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