Delivery device for at least one fluid and pump with such a delivery device

Description

State of the art

[0001] The invention relates to a conveying device at least for conveying a fluid and a pump with such a conveying device.

[0002] DE 10 2017 104400 A1 already discloses a conveying device for at least conveying a fluid. The already known conveying device comprises at least one conveying chamber, at least one conveying chamber element that at least partially delimits the conveying chamber and is dimensionally stable, and at least one elastically deformable, in particular annular, conveying element that, together with the conveying chamber element, delimits the conveying chamber and is arranged on the conveying chamber element. Furthermore, DE 10 2017 104400 A1 already discloses a pump with such a conveying device.

[0003] DE 10 2017 104400 A1 does not disclose a conveying element with at least one sealing extension formed integrally with a base body of the conveying element; a conveying chamber element with a sealing groove; and an edge surface of the conveying chamber element delimiting the sealing groove, which edge surface is arranged directly adjacent to at least one of three circular arc sections of the conveying chamber element.

[0004] Furthermore, a conveying device for conveying a fluid is already known from US 3 922 119, the conveying device comprising at least one conveying chamber, at least one conveying chamber element which at least partially delimits the conveying chamber and which is of dimensionally stable design, and 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, the conveying element comprising at least one sealing extension which is formed in one piece with a base body of the conveying element and, when the conveying element is arranged on the conveying chamber element, is arranged at least partially in a sealing groove of the conveying chamber element.

[0005] EP 2 733 355 A1 discloses a pump with an annular, elastic discharge diaphragm, wherein the discharge chamber is formed by an annular groove in a housing, over which the discharge diaphragm is placed, allowing it to expand and move in the radial direction. GB 2 564 677 A, GB 583 578 A, and WO 2016 / 173 798 A1 each disclose a pump with an annular discharge diaphragm that is compressed by an eccentric arrangement.

[0006] 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. This object is achieved according to the invention by the features of claim 1, while advantageous embodiments and further developments of the invention can be found in the subclaims. Advantages of the invention

[0007] 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 which at least partially delimits the conveying chamber and which is designed to be dimensionally stable, and with at least one elastically deformable, in particular annular, conveying element, in particular a conveying membrane, which delimits the conveying chamber together with the conveying chamber element and is arranged on the conveying chamber element, wherein the conveying element has at least one sealing extension which is formed in one piece with a base body of the conveying element and is arranged at least partially in a sealing groove of the conveying chamber element when the conveying element is arranged on the conveying chamber element.

[0008] It is proposed that the conveying chamber element has a counter surface, in particular the counter surface already mentioned, for interacting with a conveying surface of the base body of the conveying element for conveying a fluid, which counter surface extends over at least three successive circular arc sections, in particular when viewed in cross-section, wherein at least one edge region of the conveying chamber element, in particular the edge region already mentioned, delimiting the sealing groove is arranged directly adjacent to at least one of the three circular arc sections. The circular arc sections preferably form a counter surface of the conveying chamber element. Two of the three circular arc sections preferably form elevations of the counter surface and are arranged on the outside. One of the three circular arc sections preferably forms a depression and is arranged on the inside, in particular between the elevations.It is conceivable that the three circular arc sections have different or identical radii. "One-piece" is understood in particular to mean at least materially connected, for example, by a welding process, an adhesive process, an injection molding process, and / or another process deemed appropriate by a person skilled in the art, and / or advantageously formed in one piece, such as by production from a single casting and / or by production in a single- or multi-component injection molding process, and advantageously from a single blank. The sealing extension is preferably arranged on a conveying side of the base body of the conveying element. In particular, the sealing extension extends on the conveying side beyond a conveying surface of the conveying element, in particular viewed along a direction running at least substantially perpendicular to the conveying surface.The term "essentially perpendicular" is intended, in particular, to define an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, particularly viewed in a projection plane, enclose an angle of 90°, and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. Preferably, the sealing extension has a sealing projection that extends across the conveying surface in a direction that is at least substantially perpendicular to the conveying surface. The sealing projection, viewed in a plane that is at least substantially perpendicular to a main conveying direction of the conveying chamber, along which a fluid can be conveyed through the conveying chamber, has a cross-section that is semicircular or elliptical.Preferably, the seal projection has a different cross-section that would be deemed appropriate by a person skilled in the art. The seal projection or the entire seal extension is arranged in a bead-like manner on an outer edge of the base body. The seal projection has a main direction of extension that is oriented at least substantially perpendicular to the conveying surface, in particular in a direction away from the conveying side.

[0009] The conveying side of the base body is preferably 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 outer side of the base body. The activation side preferably forms an inner side 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 interaction 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, the base body, viewed in a plane, in particular in a plane running at least substantially perpendicular to a drive axis of the drive axle, has a cross-sectional shape that is essentially composed of a circular arc or an open ring extending along an angular range of less than 360° and in particular of more than 90°, and two inlet and / or outlet extensions running transversely to the circular arc or the open ring, which directly border 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 region of a circular arc or a ring profile of the base body on the base body, in particular on an inner side of the base body.A maximum longitudinal extent of the activation extension is in particular at least 5%, preferably 10%, and most preferably at least 20% smaller than a maximum longitudinal extent of the base body. The activation extension preferably extends at least substantially along the entire 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 each of which an inlet and / or outlet extension of the base body is arranged. The activation extension preferably extends along an angular range, in particular of less than 360°, preferably of less than 350°, and most preferably of more than 180° on the activation side.

[0010] The sealing groove preferably has a shape, in particular a corresponding cross-section, corresponding to the sealing extension, in particular at least to the sealing projection. The sealing groove preferably has a U-shaped cross-section, in particular when viewed in the plane extending at least substantially perpendicular to the main conveying direction of the conveying chamber. The sealing groove is preferably arranged on an inner side of the conveying chamber element facing the conveying element. The sealing groove is preferably arranged in an outer edge region of the conveying chamber element.Preferably, the sealing groove has a maximum distance from an outer edge of the conveying chamber element, which forms a transition between the inner side facing the conveying element and an outer side of the conveying chamber element facing away from the conveying element, which distance is in particular less than 15 mm, preferably less than 10 mm, particularly preferably less than 8 mm, and very particularly preferably between 12 mm and 6 mm. Preferably, the sealing groove has a maximum distance from the outer edge of the conveying chamber element, which distance corresponds in particular to at least half, in particular 50%, of a maximum transverse extent of the sealing groove, preferably corresponds at least to the maximum transverse extent of the sealing groove, and particularly preferably corresponds to a multiple of the maximum transverse extent of the sealing groove.The maximum transverse extent preferably runs at least substantially parallel to the drive axis of the drive unit and / or at least substantially perpendicular to the main conveying direction of the conveying chamber.

[0011] Advantageously, the conveying element, in particular the conveying membrane, can be moved away from the counter surface of the conveying chamber element as a result of the action of a drive force acting in a direction away from the activation side, in particular can be lifted off 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, away from the counter surface, a negative pressure can be generated which is in particular less than -0.1 bar, preferably less than -0.2 bar, and particularly preferably less than -0.3 bar, in particular relative to an atmospheric pressure surrounding the conveying device. Advantageous conveying of a conveying medium into the conveying chamber of the conveying device, which is at least partially delimited by the counter surface and the conveying surface, can be achieved.

[0012] Preferably, the conveying element, in particular the conveying membrane, can be driven by the drive unit in such a way that conveying of a conveying medium, in particular a fluid, is possible according to a traveling wave principle (cf., for example, the disclosure of EP 1 317 626 B1). The drive unit can be designed 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 aforementioned types of drive units, or as another drive unit that appears appropriate to a person skilled in the art. Preferably, the drive unit has at least the drive element that is intended to act on the conveying element, in particular the conveying membrane.However, it is also conceivable for the drive unit to have 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 appropriate 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. The eccentric shaft can preferably be driven in rotation by means of a motor unit of a pump that comprises 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, an internal combustion engine unit, a hybrid motor unit, or the like. The drive element preferably has a rotational axis. The rotational axis preferably runs transversely, in particular at least substantially perpendicularly, to a main conveying direction of the conveying chamber, along which a fluid can be conveyed through the conveying chamber.

[0013] The conveying chamber of the conveying device is preferably defined by the base body of the conveying element and the conveying chamber element. The conveying chamber of the conveying device is preferably defined by the conveying surface and the counter surface opposite the conveying surface. The conveying chamber element is preferably dimensionally stable. The conveying chamber element preferably has a prestress, in particular to apply a force to the conveying element in the direction of the drive unit and / or a pressing unit of the conveying device. The conveying element, in particular the conveying membrane, is preferably designed to be resilient. "Resilient" is to be understood in particular as a property of an element, in particular the conveying element, which is intended in particular to generate a counterforce that depends on a change in the shape of the element and is preferably proportional to the change, counteracting 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 as a result. Preferably, the conveying element, in particular the conveying membrane, in particular after deformation automatically returns to a basic shape, in particular a basic shape that is convexly curved with respect to the counter surface, in particular a zero position of the conveying element, in particular the conveying membrane. Preferably, the spring-elastic configuration of the conveying element, in particular the conveying membrane, can be at least partially influenced and / or brought about by means of a configuration, in particular a 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 chamber 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 action of a driving force on the conveying element, in particular the conveying membrane, for conveying a fluid is removed, 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, returns to a convexly curved arrangement with respect to the counter surface. The conveying element, in particular the conveying membrane, is preferably formed from a rubber-like and / or caoutchouc material.However, it is also conceivable that the conveying device, in particular the conveying membrane, is made of another material deemed appropriate by a person skilled in the art, or of a combination of several materials, which enables a spring-elastic design of the conveying element, in particular the conveying membrane. Preferably, the conveying element, in particular the conveying membrane, utilizes a "bulge effect" to convey a fluid in and / or through the conveying chamber. The conveying element, in particular the conveying surface, is preferably at least temporarily bulgeable to convey a fluid, with at least one bulge being displaceable, in particular rollingly displaceable, along the conveying surface to convey a fluid. "Provided" is to be understood in particular as being specially configured, 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 and / or performs / performs this specific function in at least one application and / or operating state.

[0014] By means of the design according to the invention, a reliable seal of the conveying chamber can be advantageously achieved. An advantageous sealing function can be achieved. Particularly advantageously, a reliable conveying of a fluid can be achieved. A reliable seal can be advantageously achieved. Leakage can be advantageously counteracted. An efficient conveying of a fluid can advantageously be realized. Advantageously, a large sealing surface can be achieved along a sealing line between the conveying chamber element and the conveying element.

[0015] Furthermore, it is proposed that the sealing groove be designed such that a flat contact occurs between the sealing extension and an edge region of the conveying chamber element delimiting the sealing groove, in particular at least in a conveying-free and a conveying state of the conveying device. A "conveying-free state" is to be understood in particular as a state of the conveying surface, particularly considered in at least one partial region of the conveying surface, in which the conveying surface is in an undeformed state, in particular in a state of the conveying surface at a maximum distance from a counter surface, and in particular, in at least one partial region of the conveying surface, is decoupled from the action of a drive force for conveying a conveying means by means of the conveying surface.The edge region delimiting the sealing groove preferably forms a transition from the sealing groove, in particular from a groove base of the sealing groove, to the counter surface against which the conveying surface can be applied. The edge region delimiting the sealing groove preferably borders, in particular directly, the sealing groove, in particular the groove base of the sealing groove, and the counter surface. The edge region delimiting the sealing groove preferably borders, in particular directly, the sealing groove, in particular the groove base of the sealing groove, and an elevation of the counter surface. In particular, at least more than 20%, preferably more than 30%, and particularly preferably more than 40% of an entire outer surface of the sealing projection lies against the edge region delimiting the sealing groove. By means of the configuration according to the invention, a multi-dimensional sealing function can advantageously be achieved. Reliable conveying of a fluid can be achieved particularly advantageously.This can advantageously achieve a reliable seal. Leakage can be advantageously counteracted. It can advantageously realize efficient fluid conveyance.

[0016] It is further proposed that the sealing groove and an edge region of the conveying chamber element delimiting the sealing groove, in particular the aforementioned edge region, which is arranged on a side of the sealing groove facing a conveying surface of the base body of the conveying element, in particular the aforementioned edge region, are designed in such a way that a flat contact of the sealing extension occurs on the edge region of the conveying chamber element delimiting the sealing groove and on a groove base of the sealing groove. In particular, at least more than 50%, preferably more than 70% and particularly preferably more than 80% of the entire outer surface of the sealing projection rests on an inner surface of and on the edge region delimiting the sealing groove. By means of the configuration according to the invention, a multi-dimensional sealing function can advantageously be realized. Reliable sealing can advantageously be achieved.Leakage can be advantageously counteracted. Efficient fluid delivery can be advantageously achieved. Reliable fluid delivery can be particularly advantageously achieved.

[0017] It is further proposed that the sealing groove extends completely around a counter surface of the conveying chamber element, in particular the aforementioned counter surface, which cooperates with a conveying surface of the main body of the conveying element to convey a fluid, and delimits the counter surface. The sealing groove is preferably arranged at an edge region of the conveying chamber element. Preferably, the counter surface is completely enclosed by the sealing groove. The sealing groove extends completely around the counter surface.Viewed along a direction running at least substantially perpendicular to the main conveying direction and / or at least substantially parallel to the drive axis of the drive unit, the sealing groove and the counter surface are arranged such that in a cross-section of the conveying chamber element the sealing groove, in particular a partial section of the sealing groove, is arranged first, followed by the counter surface and then the sealing groove, in particular a further partial section of the sealing groove, is arranged again. By means of the configuration according to the invention, a large sealing surface can advantageously be realized. It can advantageously be achieved that the conveying chamber is reliably sealed. Leakage can advantageously be counteracted. Efficient conveying of a fluid can advantageously be realized. Reliable conveying of a fluid can particularly advantageously be achieved.

[0018] Furthermore, it is proposed that the sealing extension extends completely around a conveying surface, in particular the previously mentioned one, of the base body of the conveying element and delimits the conveying surface. Preferably, the sealing projection or the entire sealing extension extends completely along the outer edge of the conveying element around the base body. By means of the configuration according to the invention, a large sealing surface can advantageously be realized. It can advantageously be achieved that the conveying chamber is reliably sealed. Leakage can advantageously be counteracted. Efficient conveying of a fluid can advantageously be realized. Reliable conveying of a fluid can particularly advantageously be achieved.

[0019] It is further proposed that the sealing extension has a transition region to an edge region of the main body of the conveying element, said transition region having a cross-section that is different from a cross-section of a further transition region of the sealing extension to a conveying surface of the main body. The transition region of the sealing extension is arranged on a side of the sealing extension facing away from the conveying surface. Preferably, the transition region of the sealing extension is arranged so as to transition tangentially to an outer contour of the sealing projection. The further transition region of the sealing extension is arranged on a side of the sealing extension facing the conveying surface. The further transition region of the sealing extension preferably borders the outer contour of the sealing projection at a geometric inflection point.By means of the design according to the invention, a large contact surface can advantageously be achieved between the edge region bounding the sealing groove and the sealing extension. A multi-dimensional sealing function can advantageously be realized. Reliable sealing can advantageously be achieved. Leakage can advantageously be counteracted. Efficient conveyance of a fluid can advantageously be realized. Reliable conveyance of a fluid can particularly advantageously be achieved.

[0020] Furthermore, it is proposed that the conveying device comprise at least one pressing unit having at least one pressing element, in particular at least one clamping ring, which is provided to apply a pressing force to the sealing extension in the direction of the conveying chamber element and to compress the sealing extension at least in the region of the sealing groove. Preferably, the pressing unit is provided to generate an inhomogeneous pressing force distribution along a sealing line of the conveying element, in particular along a circumferential direction of the conveying element. Preferably, the generation of an inhomogeneous pressing force is realized as a result of a special geometric configuration of a pressing surface of a pressing element and / or a special geometric configuration of a sealing extension of the conveying element.In particular, a configuration or a profile / distribution of the inhomogeneous contact pressure depends on maximum force peaks or maximum load peaks along the sealing line, which are due to the conveyance of a fluid, in particular its compression by means of an interaction of the conveying element and the conveying chamber element through the action of a drive unit of a pump comprising the conveying device. Preferably, the contact pressure 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 contact pressure unit, in particular at least one contact pressure element of the contact pressure unit, and the sealing extension. The conveying element can have an elongated, in particular elongated, configuration or an annular configuration.The basic functionality of the pressure unit with respect to generating an inhomogeneous contact pressure force or an inhomogeneous compression along the sealing line is preferably independent of the shape of the conveying element itself. The conveying element can be designed as a flat conveying membrane, as a circular ring-shaped conveying membrane, or as another conveying membrane that appears appropriate to a person skilled in the art, such as a plate- or disk-shaped conveying membrane or the like. A geometric configuration of the contact pressure surface and a geometric configuration of the sealing extension interacting with the contact pressure surface are preferably responsible for generating an inhomogeneous contact pressure force or for an inhomogeneous compression along the sealing line.

[0021] The conveying element preferably exhibits 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 configuration 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 region, in particular along a maximum circumferential extent of the annular conveying element.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 chamber element by means of the pressing element, in particular being pressed against the conveying chamber element with varying strengths along the maximum overall extent of the sealing region. The pressing element exerts a pressing force on the conveying element that runs at least substantially parallel to a rotational axis of a drive element of the drive unit. Preferably, the pressing element exerts a further pressing force on the conveying element that runs transversely, in particular at least substantially perpendicularly, to the rotational axis of the drive element.In particular, the pressing element comprises a circumferential collar for generating a pressing force on the conveying element, which pressure force runs substantially parallel to the rotational axis of the drive element. The pressing unit preferably 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 with varying degrees of force 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 chamber element.

[0022] The pressing element preferably presses the sealing extension, in particular at least along a circumferential direction of the conveying chamber element, against the conveying chamber element, in particular with a pressing force that is inhomogeneous along the circumferential direction. Preferably, a main direction of action of the inhomogeneous pressing force is oriented transversely, in particular at least substantially perpendicularly, to the rotational axis of the drive element. The pressing element preferably has a pressing surface that has a varying level along a maximum longitudinal extent of the pressing surface, in particular along a circumferential direction of the pressing element, in particular a varying distance relative to a surface of the pressing element facing away from the pressing surface, in particular an inner surface.The varying level of the contact surface is preferably formed by a different curvature along an overall profile of the contact 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 for the varying level of the contact surface to be formed by different maximum heights of elevations in the contact 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 for the varying level of the contact surface to be formed by different maximum thicknesses of an edge, in particular a collar, of the contact element, on which the contact surface is arranged on a side of the contact element arranged towards the conveying element.Further designs of the contact surface that appear sensible to a person skilled in the art to achieve the varying level of the contact surface are also conceivable.

[0023] Alternatively or additionally, it is conceivable for the sealing extension, which is pressed against an inner circumference of the annular conveying chamber element by means of the pressing unit, to have a maximum longitudinal extent running along a direction, in particular along a circumferential direction of the conveying element, and to have a varying maximum thickness. The maximum thickness is preferably formed by a maximum extent, in particular a maximum height, of the sealing extension, in particular viewed along a direction running at least substantially perpendicular to the conveying surface. However, it is also conceivable for the maximum thickness of the sealing extension to be formed by a maximum extent of the sealing projection starting from the conveying surface, in particular viewed along a direction running at least substantially perpendicular to the conveying surface.Preferably, the sealing extension is pressed into the at least one sealing groove by means of the at least one pressing element, in particular a clamping ring, of the pressing unit, wherein 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 pressing surface and / or the varying thickness of the sealing extension, it is also conceivable for the sealing groove to have a varying level, in particular to realize an inhomogeneous pressing force along the sealing line. By means of the configuration 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 fluid delivery can be advantageously achieved. Reliable fluid delivery can be particularly advantageously achieved.

[0024] It is also proposed that the sealing extension extends across the conveying surface in a direction running transversely, in particular at least substantially perpendicularly, to a conveying surface, in particular to the previously mentioned conveying surface of the base body of the conveying element. Preferably, at least the sealing projection of the sealing extension extends from the conveying surface across the conveying surface, in particular along a direction running transversely, in particular at least substantially perpendicularly, to the conveying surface. By means of the configuration according to the invention, an advantageous sealing effect of the sealing extension can be achieved. A reliable seal can advantageously be achieved. Leakage can advantageously be counteracted. An efficient conveying of a fluid can advantageously be realized. A reliable conveying of a fluid can particularly advantageously be achieved.

[0025] Furthermore, a pump with at least one conveying device according to the invention is proposed. The pump is preferably intended for use in a food sector, in a chemical sector, in a pharmaceutical sector, in particular for batch-compliant use, in a vivarium sector (aquarium, etc.), in a household appliance sector, in a dental hygiene sector, in an automotive sector, in a medical sector, in a water treatment sector, or the like. The pump preferably comprises at least one drive unit, in particular the one already mentioned, which has at least one drive element, in particular the one already mentioned, in particular at least one eccentric shaft, which is largely surrounded by the conveying chamber element, the conveying element, and the pressing unit, in particular viewed along a circumferential direction extending around a drive axis of the drive unit.Preferably, the drive unit, in particular at least the drive element, is completely surrounded by the conveying chamber element, the conveying element, and the pressing unit, particularly when viewed along the circumferential direction extending around the drive axis of the drive unit. The design according to the invention advantageously allows for the realization of a compact and powerful pump. A high degree of serviceability can advantageously be achieved, in particular since the conveying device as a whole, together with the drive unit, can be removed from a housing.

[0026] The pump and / or the conveying device should not be limited to the application and embodiment described above. In particular, the pump and / or the conveying device may have a number of individual elements, components, and units that differs from the number stated herein to fulfill a functionality described herein. Drawings

[0027] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0028] They show: Fig. 1 shows a pump according to the invention with a conveying device according to the invention in a schematic representation, Fig. 2 shows the pump according to the invention with an open housing in a schematic representation, Fig. 3 shows a sectional view through the pump according to the invention in a schematic representation, Fig. 4 shows a further sectional view through the pump according to the invention in a schematic representation, Fig. 5 shows the conveying device according to the invention in a state removed from the housing of the pump in a schematic representation, Fig. 6 shows a conveying element of the conveying device according to the invention in a schematic representation, Fig. 7 shows a conveying chamber element of the conveying device according to the invention in a schematic representation, Fig. 8 shows a partial sectional view through the conveying element and the conveying chamber element in a schematic representation, Fig. 9 shows a pressing element of a pressing unit of the conveying 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 embodiment

[0029] Figure 1shows 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 the 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 conveying chamber element 20 which at least partially delimits the conveying chamber 18 and is 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 conveying chamber element 20 is formed at least to a large extent, in particular entirely, from a plastic, in particular from an injection-molded plastic. However, it is also conceivable for the conveying chamber element 20 to be formed from another material that would appear appropriate to a person skilled in the art. The conveying element 22 is preferably formed at least to a large extent, in particular entirely, from a rubber, in particular a synthetic rubber, such as EPDM, FKM, NBR or the like. However, it is also conceivable for the conveying element 22 to be formed from another material that would appear appropriate to a person skilled in the art.

[0030] The pump 10 comprises at least the drive unit 16 for acting on the conveying device 12 and at least one housing 14 for receiving 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 for the drive element 24 to have a different design that would appear expedient to a person skilled in the art, such as, for example, a rotationally symmetrical shaft on which at least one eccentric is arranged to act on the conveying device 12, or the like. The drive element 24 can be connected directly, in particular in a rotationally fixed manner, or indirectly, for example by means of a gear unit or by means of at least one gear element, to a drive shaft of a motor unit (not shown in detail here), such as, for example, an electric motor, an internal combustion engine, a pneumatic motor, or the like. The drive element 24 has an axis of rotation 26 that runs transversely, in particular at least substantially perpendicularly, to a main conveying direction along which a fluid can be conveyed through the conveying chamber 18.

[0031] Preferably, the conveying device 12 is arranged at least for the most part, in particular completely, within the housing 14. The housing 14 surrounds the conveying device 12 at least for the most part, in particular completely. In particular, the housing 14 is provided in a manner known to a person skilled in the art to at least partially, in particular completely, enclose and / or mount the conveying device 12 and / or the drive unit 16 of the pump 10. The housing 14 can be made of a plastic, a metal, a combination of plastic and metal, or another material deemed appropriate by a person skilled in the art. The housing 14 can have a shell construction, a pot construction, a combination of a shell construction and a pot construction, or another construction deemed appropriate by a person skilled in the art.

[0032] The housing 14 is designed at least separately from the conveying chamber element 20 of the conveying device 12, in particular from the conveying device 12 as a whole, in particular such that the conveying chamber 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 disassembly of a housing upper part 36, in particular together with the conveying element 22 arranged on the conveying chamber element 20. The conveying device 12 can preferably be removed as a whole from the housing 14, decoupled from the disassembly of individual parts of the conveying device 12, in particular after disassembly of the housing upper part 36 of the housing 14.The housing 14 surrounds at least the conveying chamber element 20, in particular the conveying device 12, along a circumferential direction extending in a plane extending at least substantially perpendicular to a drive axis 70 of the drive unit 16, at least to a large extent, in particular in a state of the conveying device 12, in particular the conveying device 12 as a whole, arranged in the housing 14.

[0033] The conveying chamber element 20 is, viewed along a direction extending transversely to the drive axis 70 of the drive unit 16, 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 conveying device 12 surrounds the drive unit 16 at least essentially completely, in particular along a circumferential direction that runs in a plane extending at least essentially perpendicular to the drive axis 70 of the drive unit 16, at least when the conveying device 12 is arranged in the housing 14. The conveying chamber element 20 has an outer side that, when the conveying device 12 is arranged on the housing 14, is non-positively and / or positively connected to an inner side of the housing 14, in particular rests, preferably directly, on the inner side of the housing 14. When the conveying device 12, in particular the conveying device 12 as a whole, is arranged in the housing 14, the outer side of the conveying chamber element 20 preferably rests at least partially on the inner side of the housing 14, in particular at least on an inner side of a lower housing part 72 of the housing 14.Preferably, more than 30%, preferably more than 40%, particularly preferably less than 95%, and most particularly preferably between 40% and 60% of a total outer surface of the outer side of the conveying chamber element 20 lies against the inner side of the housing 14, in particular against the inner side 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 is arranged. The recess of the housing 14, in particular of the lower housing part 72, is preferably delimited by a collar-like extension in the interior of the housing 14, in particular of the lower housing part 72. The collar-like extension extends over less than 360°, in particular to enable an arrangement of an inlet and outlet region of the conveying device 12 in the housing 14, in particular in the lower housing part 72.

[0034] Furthermore, the housing 14 comprises at least one receptacle 32, in particular at least two receptacles 32, 34, for receiving at least one fluid supply line adapter 28 and / or one fluid discharge adapter 30 of the conveying device 12. The fluid supply line adapter 28 is preferably provided for connection to a fluid line, in particular in order to supply fluid to the conveying chamber 18. The fluid discharge adapter 30 is preferably provided for connection to a fluid line, in particular in order to discharge fluid from the conveying chamber 18. The receptacle(s) 32, 34 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 housing lower part 72 or the like. Preferably, the fluid supply line adapter 28 and / or the fluid discharge adapter 30 is / are 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 on an inner side an internal thread for fixing the fluid supply line adapter 28 and / or the fluid discharge adapter 30 to the housing 14, in particular to the housing upper part 36 (cf. Figure 3). However, it is also conceivable for the fluid supply adapter 28 and / or the fluid discharge adapter 30 to be arranged, in particular secured, 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. The receptacle(s) 32, 34 extend(s) from an outer side of the housing 14, in particular the upper housing part 36, continuously to an inner side of the housing 14, in particular the upper housing part 36. The receptacle(s) 32, 34 is / are preferably designed as through-opening(s) from the outer side to the inner side 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 as far as the outside of the housing 14, in particular beyond it, preferably in a connected state of a connection 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, connection piece 40 of the conveying chamber element 20 with the fluid discharge adapter 30 (cf. Figure 3 ).

[0035] 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 conveying chamber 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 conveying chamber element 20, viewed in a plane, in particular in a plane running at least substantially perpendicular to a rotational axis 26 of the drive element 24, in particular to the drive axis 70 of the drive unit 16, has a cross-sectional shape which is substantially composed of a circular arc or an open ring extending along an angular range of less than 360° and in particular of more than 90°, and the two transverse extensions 60, 62 running transversely to the circular arc or the open ring, which directly border 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 each have / have, in particular, a main extension axis 64, 66 that runs transversely, in particular at least substantially perpendicularly, to a main extension plane of the at least one transverse extension 60, 62, in particular of the respective transverse extension 60, 62. Preferably, the main extension axis(es) 64, 66 of the connecting piece 38 and / or of the, in particular, further connecting piece 40 run / 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 of the, in particular, further connecting piece 40 run / run at least substantially parallel to the plane running at least substantially perpendicular to the rotational axis 26 of the drive element 24.The connecting piece 38 and the, in particular, further connecting piece 40 are arranged in different, in particular opposite, orientations on the side of the conveying chamber element 20 facing away from the conveying element 22, in particular on the outside. Preferably, the connecting piece 38 and the, in particular, further connecting piece 40 extend from the outside of the conveying chamber 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 conveying chamber element 20 in directions facing away from the conveying chamber element 20, wherein the directions are oppositely oriented.

[0036] The connecting piece 38 and / or the, in particular, further connecting piece 40 are / is arranged in a state of the conveying device 12 arranged in the housing 14 at a distance relative to an inner wall of the housing 14, in particular at least of the housing upper part 36 and / or the housing lower part 72, in particular viewed along the main extension axis(es) 64, 66 of the connecting piece 38 and / or the, in particular, further connecting piece 40 (cf. Figures 2 and 3). Preferably, the connecting piece 38 and / or the, in particular, further connecting piece 40 are / is arranged at a distance along an entire circumference of the connecting piece 38 and / or the, in particular, further connecting piece 40 when the conveying device 12 is arranged in the housing 14 relative to the inner wall of the housing 14, in particular relative to an inner side of the housing upper part 36 and / or to an inner side of the housing lower part 72. 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 inner side of the housing upper part 36 and / or to the inner side of the housing lower part 72, is greater than 0.001 mm, preferably greater than 0.01 mm, particularly preferably greater than 0.1 mm and most preferably less 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, rests against 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, and in particular, when the conveying device 12 is arranged in the housing 14, is supported 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.

[0037] The conveying chamber element 20 comprises at least the connecting piece 38 for the fluid supply adapter 28, which is in particular designed differently from a hose, and / or at least the, in particular further, connecting piece 40 for the fluid discharge adapter 30, which is in particular designed differently from a hose, which are / is arranged on a side of the conveying chamber element 20 facing away from the conveying element 22, in particular on the outside (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 have / have a conically extending inlet end 44, 46 (cf. Figures 3 and 10). The inlet end 44, 46 of the fluid supply line adapter 28 and / or the fluid discharge adapter 30 is arranged in the connection piece 38 or in the, in particular, further, connection piece 40 when the fluid supply line adapter 28 and / or the fluid discharge adapter 30 is arranged on the conveying chamber element 20. The fluid supply line adapter 28 and / or the fluid discharge adapter 30 preferably comprises / comprise a coupling end 48, 50 for a connection to a supply line or to a discharge line for a supply line or a discharge of a fluid from or into the conveying chamber 18. It is also conceivable that the fluid supply line adapter 28 and / or the fluid discharge adapter 30 is / are provided for a connection to other components that appear appropriate to a person skilled in the art, such as, for example, fluid coupling pieces, hose nozzles or the like. The coupling end 48, 50 is on a side of the fluid supply adapter 28 or 50 facing away from the insertion end 44, 46.of the fluid discharge adapter 30. Preferably, the fluid supply adapter 28 and the fluid discharge adapter 30 have an at least substantially identical design. However, it is also conceivable for the fluid supply adapter 28 and the fluid discharge adapter 30 to be at least partially different from one another, such as, for example, in an embodiment of a functional unit 58 or the like.

[0038] 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 arranged at least partially, in particular completely, in the fluid supply adapter 28 and / or in the fluid discharge adapter 30 (cf. Figures 2 , 3 and 10). The functional unit 58 is preferably at least partially, in particular completely, firmly integrated into the fluid supply line adapter 28 and / or into the fluid discharge adapter 30 or at least partially, in particular completely, interchangeably arranged in the fluid supply line 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 line adapter 28 or in the fluid discharge adapter 30. Other embodiments or arrangements of the functional unit 58 which appear expedient to a person skilled in the art are also conceivable, such as, for example, an arrangement between the connecting piece 38 and the fluid supply line adapter 28 or between the, in particular further, connecting piece 40 and the fluid discharge adapter 30 or the like.

[0039] The fluid supply adapter 28 and / or the fluid discharge adapter 30 are / are removably arranged on the housing 14, in particular on the housing upper 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 to the housing 14, in particular on the housing upper 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 are / are arranged in particular on an outer side 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 cooperate with the external thread(s) to secure the fluid supply adapter 28 and / or the fluid discharge adapter 30 to the housing 14, in particular clamping 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 comprises further components that appear appropriate to a person skilled in the art for securing the fluid supply adapter 28 and / or the fluid discharge adapter 30 to the housing 14, in particular to the housing upper part 36, by means of a positive and / or non-positive connection, such as a securing ring, a securing pin or the like.

[0040] The conveying device 12 comprises at least one movement compensation unit 52, which is at least provided to at least partially compensate and / or dampen relative movements between the fluid supply line adapter 28 and the connection piece 38 when the connection piece 38 is connected to the fluid supply adapter 28 and / or to at least partially compensate and / or dampen relative movements between the fluid supply adapter 30 and the, in particular, further, connection piece 40 when the, in particular, further, connection piece 40 is connected to the fluid discharge adapter 30 (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 for the damping element(s) 54, 56 to have a different design that appears expedient to a person skilled in the art, such as, for example, as an elastomer disk, as an elastomer hollow cylinder, or the like. The damping element(s) 54, 56 is / are preferably 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 is / are located on an inner side of the connecting piece 38 and on an outer side of the insertion end 44 of the fluid supply adapter 28 oron an inner side of the, in particular further, connection piece 40 and on an outer side of the insertion end 46 of the fluid discharge adapter 30. Preferably, the damping element(s) 54, 56 are provided, in particular in addition to movement damping, for a fluidic seal between the connection piece 38 and the fluid supply adapter 28 or for a fluidic seal between the, in particular further, connection piece 40 and the fluid discharge adapter 30.

[0041] The conveying element 22 comprises at least one, in particular at least substantially annular, base body 76 (cf. Figures 3 and 6), which is elastically deformable and has at least one conveying surface 78 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 connection to at least one transmission element 82 of the drive unit 16, which cooperates on an activation side of the base body 76 with the activation extension 80, in particular with the plurality of activation extensions 80. Preferably, the conveying side of the base body 76 is arranged 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 outer side of the base body 76. Preferably, the activation side forms an inner side 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 formed in one piece with the base body 76. However, it is also conceivable that the activation extension 80, in particular the activation extensions 80, is / are formed separately from the base body 76 and is / are fixed to the base body 76 by means of a form-fitting and / or force-fitting connection that would be considered appropriate by a person skilled in the art.

[0042] The activation extension 80, in particular the activation extensions 80, is / are designed as a form-fitting and / or force-fitting element(s) which cooperate(s) with the transmission element 82 by means of a form-fitting and / or force-fitting connection, in particular by means of a non-material form-fitting and / or force-fitting connection, at least for transmitting a drive force acting in a direction away from the activation side. Preferably, the activation extension 80, in particular the activation extensions 80, are 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 extending around the drive axis 70 of the drive unit 16.

[0043] Preferably, the base body 76, viewed in a plane, in particular in a plane running at least substantially perpendicular to the drive axis 70, has a cross-sectional shape which is substantially composed of a circular arc or an open ring and two inlet and / or outlet extensions running transversely to the circular arc or the open ring. 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 running transversely to the circular arc or 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 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 consecutive 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. Preferably, the activation extension 80 or the plurality of consecutive activation extensions 80 together extend along an angular range, in particular of more than 270°, preferably of less than 360°, or of 360° on the activation side.

[0044] The conveying chamber element 20 surrounds the conveying element 22 along a circumferential direction, in particular in a plane extending at least substantially perpendicular to the drive axis 70 of the drive unit 16, at least to a large extent (cf. Figures 3 and 5 ). The conveying chamber element 20 is annular. Preferably, the conveying chamber element 20 and the conveying element 22, in particular viewed in the plane extending at least substantially perpendicular to the drive axis 70 of the drive unit 16, have an at least substantially analogous shape. In particular, the conveying chamber 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 omega as a capital letter, wherein preferably the extensions of the conveying chamber element 20 and the conveying element 22 are angled by 90° compared to extensions of the Greek capital letter omega.

[0045] The conveying chamber element 20 has a counter surface 74 which cooperates with the conveying surface 78 of the conveying element 22 for conveying a fluid, which counter surface 74 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 at least substantially the entire, in particular circularly arcuate, inner side of the conveying chamber element 20. Preferably, the elevation(s) 84, 86 extend / extend along the inner side of the conveying 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.

[0046] The conveying element 22, in particular the base body 76, has the conveying surface 78 which, viewed in a cross section of the conveying element 22, in particular in a cross section of the conveying chamber 18, has a maximum transverse extent which corresponds at least substantially, in particular completely, to a maximum transverse extent of the counter surface 74 of the conveying chamber element 20 (cf. Figures 4 and 8). In order to convey a fluid into and / or through the conveying chamber 18, the conveying surface 78 can be placed, in particular completely placed, against the counter surface 74 of the conveying chamber element 20 as a result of the action of a drive force that can be generated by the drive unit 16. The counter surface 74 of the conveying chamber element 20 has, viewed in a cross-section of the conveying chamber 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 for the three circular arc sections to have different or identical radii.

[0047] The conveying chamber element 20 has at least one connecting 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 arranged on the edge of the conveying element 22, preferably sealing extension 90, of the conveying element 22, engages, in particular sealingly engages, in a state arranged on the conveying chamber element 20 (cf. Figures 4 and 8). The conveying element 22 has at least the sealing extension 90, which is formed integrally with the base body 76 of the conveying element 22 and, when the conveying element 22 is arranged on the conveying chamber element 20, is arranged at least partially in the sealing groove 88 of the conveying chamber element 20. The sealing groove 88 is designed such that a flat contact occurs between the sealing extension 90 and an edge region 92 of the conveying chamber element 20 delimiting the sealing groove 88. The sealing groove 88 and the edge region 92 of the conveying chamber element 20 which delimits the sealing groove 88 and 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 such that a flat contact of the sealing extension 90 takes place on the edge region 92 of the conveying chamber element 20 which delimits the sealing groove 88 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. Preferably, the sealing groove 88 extends on the transverse extensions 60, 62 of the conveying chamber element 20 around an inlet or outlet opening in the respective transverse extension 60, 62 and merges, in particular seamlessly, into the annular inner side of the conveying chamber element 20, in particular to delimit the counter surface 74. Preferably, the sealing groove 88 extends along an entire inner edge region of the conveying chamber element 20.The conveying chamber element 20 has, for cooperation with the conveying surface 78 of the base body 76 of the conveying element 22 for conveying a fluid, the counter surface 74 which extends over the at least three circular arc sections which are successive, in particular when viewed in a cross-section, wherein at least the edge region 92 of the conveying chamber element 20 which delimits the sealing groove 88 is arranged, in particular directly, adjacent to at least one, in particular to an outer one, of the three circular arc sections.

[0048] 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 circular ring-shaped basic shape of the base body 76, in particular to delimit 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 transition region 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 ).

[0049] 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 provided to apply a pressing force to the sealing extension 90 in the direction of the conveying chamber element 20 and to compress the sealing extension 90 at least in the region of the sealing groove 88 (cf. Figures 4 , 5 and 9). The sealing extension 90 extends across the conveying surface 78 in a direction running transversely, in particular at least substantially perpendicularly, 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, to generate an inhomogeneous pressing force at least in a sealing region 102 between the conveying element 22 and the conveying chamber 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 chamber element 20. The sealing region 102 is preferably formed by the interaction of the sealing groove 88 and the sealing extension 90. The sealing region 102 is preferably formed by a contact surface between the sealing extension 90 and the sealing groove 88.The contact pressure unit 96 is preferably provided 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.

[0050] The pressing unit 96 is preferably 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 chamber 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 chamber element 20.Preferably, the conveying element 22 can be pressed against the inner circumference of the annular conveying chamber 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 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 that is inhomogeneous 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 pressing surface 104, in particular an inner surface, of the pressing element 98, 100. The varying level of the pressing surface 104 is preferably formed by different maximum heights of the pressing surface 104 along the circumferential direction. By way of example, in . Figure 9Three different positions 106, 108, 110 on the pressing element 98 are indicated by dashed lines, at which the pressing surface 104 is provided to generate 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 thickness of the pressing element 98 at the three positions 106, 108, 110 compared to other positions of the pressing element 98, by changing a geometric profile of the pressing surface 104 on a side of the pressing element 98 facing the conveying element 22, or in another way that appears reasonable to a person skilled in the art. For example, the sealing extension 90 is compressed to different degrees due to the varying level at the 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 thickness 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 very particularly preferably by more than 19% of the maximum thickness 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 thickness 68 of the sealing extension 90.

[0051] 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 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, wherein the pressing element 98 and the further pressing element 100 are arranged on the conveying element 22 on opposite sides of the conveying element 22. Preferably, the pressing element 98 and the further pressing element 100 of the pressing unit 96 have an at least substantially analogous design. 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 against the conveying chamber element 20 and to press the sealing extension 90 into the sealing groove 88.The conveying chamber element 20 has at least the groove, preferably the sealing groove 88, which runs in particular along an inner circumference of the annular conveying chamber element 20 and into which at least the sealing extension 90 of the, in particular annular, conveying element 22 is pressed by means of the pressing element 98, in particular the clamping ring, and / or the further pressing element 100 of the pressing unit 96, wherein a compression of the sealing extension 90 along a maximum longitudinal extent of the sealing extension 90, which runs in particular along a circumferential direction of the conveying element 22, is inhomogeneous.Alternatively or in addition to a varying level of the contact surface 104 of the contact pressure element 98 and / or the further contact pressure element 100, it is conceivable for the conveying element 22 to have at least the sealing extension 90, which is pressed against an inner circumference of the annular conveying chamber element 20 by means of the contact pressure unit 96 and has a maximum thickness 68 that varies 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 contact pressure unit 96 that appear appropriate to a person skilled in the art for generating an inhomogeneous compression of the sealing extension 90 along the circumferential direction in the sealing region 102 are also conceivable.

Claims

1. A pumping device at least for pumping a fluid, having at least one pumping space (18), having at least one pumping space element (20) which at least partially delimits the pumping space (18) and is designed to be dimensionally stable, and having at least one elastically deformable, in particular annular, pumping element (22), in particular a pumping diaphragm, which delimits the pumping space (18) together with the pumping space element (20) and is arranged on the pumping space element (20), the pumping element (22) having at least one sealing extension (90), which is formed in one piece with a base body (76) of the pumping element (22) and, in a state of the pumping element (22) arranged on the pumping space element (20), is arranged at least partially in a sealing groove (88) of the pumping space element (20), the pumping space element (20) having a counter surface (74) for cooperation with a pumping surface (78) of the base body (76) of the pumping element (22) for pumping a fluid, which extends over at least three successive circular arc sections, in particular when viewed in cross-section, wherein at least one edge surface (92) of the pumping space element (20) delimiting the sealing groove (88) is arranged directly adjacent to at least one of the three circular arc sections.

2. The pumping device according to claim 1, wherein the sealing groove (88) is designed such that a flat contact takes place between the sealing extension (90) and the edge surface (92) of the pumping space element (20) delimiting the sealing groove (88).

3. The pumping device according to claim 1 or 2, wherein the sealing groove (88) and the edge surface (92) of the pumping space element (20) delimiting the sealing groove (88), which is arranged on a side of the sealing groove (88) facing the pumping surface (78) of the base body (76) of the pumping element (22), are designed such that a flat contact of the sealing extension (90) on the edge surface (92) of the pumping space element (20) delimiting the sealing groove (88) and on a groove base (94) of the sealing groove (88) takes place.

4. The pumping device according to any one of the preceding claims, wherein the sealing groove (88) extends completely around the counter surface (74) of the pumping space element (20), which cooperates with the pumping surface (78) of the base body (76) of the pumping element (22) to pump a fluid, and delimits the counter surface (74).

5. The pumping device according to any one of the preceding claims, wherein the sealing extension (90) extends completely around the pumping surface (78) of the base body (76) of the pumping element (22) and delimits the pumping surface (78).

6. The pumping device according to any one of the preceding claims, wherein the sealing extension (90) has a transition region to an edge region of the base body (76) of the pumping 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 pumping surface (78) of the base body.

7. The pumping device according to any one of the preceding claims, comprising 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 pumping space element (20) and to compress the sealing extension (90) at least in the region of the sealing groove (88).

8. The pumping device according to any one of the preceding claims, wherein the sealing extension (90) extends across the pumping surface (78) in a direction running transversely, in particular at least substantially perpendicularly, to the pumping surface (78) of the base body (76) of the pumping element (22).

9. A pump with at least one pumping device according to any one of the preceding claims.