Stator for a pump and method for manufacturing a stator for a pump

Abstract

The invention relates to a stator for a pump, in particular for a rotary piston pump or an eccentric screw pump, having a base body, the base body surrounding a pump chamber for a rotor arrangement of the pump and having a support body and a running body, and the running body forming a running surface for at least partially contacting the rotor arrangement of the pump, the support body and the running body have a common material, and the material density of the material of the support body and the material density of the material of the running body are arranged to be different from each other such that different elasticity and / or different hardness of the materials in the support body and in the running body are achieved by means of the different arranged material densities. The invention also relates to a method for manufacturing such a stator.

Description

Technical Field

[0001] The invention relates to a stator for a pump, in particular for a rotary piston pump or an eccentric screw pump, having a base body, wherein the base body surrounds a pump chamber of a rotor arrangement for the pump, the base body having a support body and a running body, and the running body forming a running surface for at least partial contact with the rotor arrangement of the pump. The invention also relates to a method for producing a stator for a pump and a stator for a pump produced by means of this method. Background Art

[0002] Known stators for, for example, eccentric screw pumps are sometimes equipped with an elastomer, for example with a coating formed of an elastomer, in order to ensure good elastic properties during operation of the pump compared to a rotor running in the stator. Alternatively, stators are known that are designed as solid stators, for example made of metal, which exhibit good wear properties during operation, but which require high standards of manufacturing precision and exhibit relatively low pumping performance or, for example, incomplete sealing.

[0003] With regard to the cross-section and / or linear expansion of the elastic material of such a stator, the corresponding stiffness, elasticity and / or hardness within the stator are identical and depend, for example, only on the thickness and / or specific properties of the chosen elastomer. Summary of the invention

[0004] The object of the present invention is to improve the prior art.

[0005] This object is achieved by a stator for a pump, in particular for a rotary piston pump or an eccentric screw pump, which has a base body, wherein the base body surrounds a pump chamber for a rotor arrangement of the pump, the base body has a support body and a running body, and the running body forms a running surface for at least partial contact with the rotor arrangement of the pump, wherein the support body and the running body have a common material, the material density of the material of the support body and the material density of the material of the running body are set to be different from each other, so that different elasticities and / or different hardnesses of the materials in the support body and in the running body are achieved by means of the differently set material densities.

[0006] By means of this design of the stator, a common material can be used for the entire stator or for a large part of the stator and a structural differentiation between the running body and the supporting body can also be achieved so that the running body and the supporting body each have different properties which are relevant in the operation of the pump.

[0007] In this way, for example, properties can be impressed on the running body which aim at a certain sealing strength, while at the same time, for example, properties can be impressed on the supporting body which bring about a high elasticity and restoring force to mechanical loads.

[0008] The following terms are defined in this document:

[0009] A "pump" is a technical device for conveying fluids by means of movement, in particular by means of the relative movement of mechanical parts relative to one another. In particular, the pumps relevant to the present invention are so-called positive displacement pumps. Such positive displacement pumps convey fluids in particular by means of a local displacement of the fluid and are designed, for example, as rotary piston pumps or eccentric screw pumps.

[0010] "Stator" refers to the fixed part of the pump, relative to which, for example, a rotor is arranged movably. Such a stator is designed to work precisely with the rotor of the pump (for example in a rotary piston pump) or to ensure an elastic connection of the stator to the rotor or rotor arrangement of the pump (for example in an eccentric screw pump) during the rotary movement or eccentric rotary movement of the rotor. The stator and the rotor together fulfill the function of a "pump", i.e. a technical device for moving a fluid (for example for pumping liquids) by dynamically moving the volume within the pump by means of the interaction of the stator and the rotor.

[0011] A "matrix" is here a mechanical whole of the stator which provides the structural integrity of the matrix and the corresponding functional surfaces. If the stator is arranged in a pump, such a matrix of the stator surrounds, for example, completely or partially, a "pump chamber". The pump chamber is used to accommodate a rotor arrangement, for example one rotor or multiple rotors, wherein the rotor in this context can also be an eccentric screw shaft of an eccentric screw pump. Similarly, a rotor or a corresponding rotor arrangement can also describe a gear in a gear pump, a rotating cam in a rotary piston pump or a similar technical device in a correspondingly designed pump. In this context, the core idea of ​​the invention is to equip at least one of the two components, i.e. the stator and / or one or more corresponding rotors, with a common material and different material densities to produce different technical properties. This is achieved, for example, by a corresponding manufacturing process.

[0012] In this context, a "support body" is understood to mean, for example, a part of a supporting structure or a base body which serves essentially to mechanically bear forces and, for example, to absorb deformations, while a "running body" serves in particular to act relative to the rotor arrangement and to provide a "running surface" relative to the rotor. For this purpose, it is particularly relevant if the running body and the provided running surface have, for example, a higher hardness than the support body or, for example, exhibit better wear properties or improved or adapted sliding properties compared to the rotor.

[0013] In this article, "universal material" refers in particular to a universal substrate or universal raw material for forming the support body and running body of the stator. For example, a specific group or type of elastomer can be selected as the universal material, and a specific metal, such as stainless steel, can also be selected. For example, TPE, i.e., thermoplastic elastomer, can also be used as an elastomer. This TPE has the elastic properties of an elastomer and can be at least partially softened or melted by heat compared to traditional (e.g., vulcanized) elastomers. Such TPEs are generally recyclable and therefore sustainable. It should be noted that the support body and / or running body are formed from universal raw materials and have the same or comparable chemical properties even after the manufacturing process, but are designed to be different in terms of their macroscopic or microscopic material density. This different material density does not represent a difference from the "universal material" here.

[0014] In this context, the “material density” of the individual component bodies of the base body describes the arrangement of the corresponding material components to achieve different specific gravities and / or different material percentages in a comparative volume, so that the material density can be both the weight density, for example in g / cm 3 The unit may also be referred to as the structural density, for example in vol. % (volume percentage). Such a structural density may also be achieved here, for example, by an inhomogeneous distribution of materials and missing parts within a defined volume.

[0015] "Arranged differently" in this context describes that the material density of the material of the support body is selected to be, for example, lower or higher than the material density of the material of the running body, ie for example the running body has a smaller porosity than the support body and / or has a higher specific gravity.

[0016] "Elasticity" refers to the property of a material produced in this way to absorb elastic deformations without causing lasting damage to the material, for example providing high elongation at break and / or high energy absorption capacity. In this context, "hardness" refers to the resistance of a material to local deformations, such as resistance to extrusion and / or resistance to mechanical wear caused by surface erosion. For example, a "hard" material is more wear-resistant than a "soft" material. For elastomers, another or alternative evaluation criterion is rebound elasticity, which describes the ability of a material to retain an applied deformation and return to its original shape after loading. This property is particularly important when the rotor moves in the stator, as a rapid and complete rebound of the stator is relevant to maintaining the tightness.

[0017] In order to design the running body to be particularly wear-resistant relative to the rotor, the material density of the running body is higher than that of the supporting body, so that the running body has a particularly low elasticity and / or a higher hardness and / or an adapted rebound elasticity than the supporting body.

[0018] In one embodiment, the support body has a first support body part, a second support body part, a third support body part and / or a further support body part, wherein the material densities of the materials of the individual support body parts are set differently from each other, so that by means of the differently set material densities, for example, a different elasticity and / or a different hardness of the material in the respective support body part compared to another respective support body part is achieved, wherein in particular the individual support body parts are arranged in a layer which is arranged essentially radially around the pump chamber.

[0019] By means of this embodiment, the support body can be changed mechanically, for example, gradually, wherein the demarcation between the individual support body parts can also be realized fluidically, so that, for example, an elastic spectrum and / or a hardness spectrum can be realized in particular in the radial direction of the pump body. However, it is also possible to select corresponding support body parts in layers, parts or regions of the support body. Such "support body parts" are here different parts, regions or partial regions of the support body that can be geometrically positioned.

[0020] It should be mentioned that a suitable material density can also be selected gradually or stepwise along the longitudinal axis of the eccentric screw pump rotor to counteract the increasing internal pressure in the pump chamber due to the design principle of the eccentric screw pump. For example, the hardness of the stator at the input side of the eccentric screw pump with lower pressure is selected to be lower, and the hardness increases in the direction of the output side of the eccentric screw pump to counteract the gradually increasing pressure in the conveying direction and further ensure the seal between the stator and the rotor.

[0021] In this context, the term "radially around the pump chamber" describes, for example, an arrangement around the shaft of the rotor, i.e. the corresponding axis of rotation. In this context, it should be noted that "radially" cannot be interpreted mathematically exactly, but includes technical deviations determined, for example, by the geometry of the rotor or other boundary conditions. Thus, in the case of a rotary piston pump, a local "radial" arrangement around the pump chamber can also denote a corresponding sub-area of ​​the pump associated with a corresponding rotating cam.

[0022] For example, the support body and / or in particular the corresponding support body parts have an internal structure, wherein the internal structure has pores, cavities and / or chambers as well as webs, thin sheets and / or material bridges, wherein a different elasticity of the material in the support body and in the running body, an adapted spring effect and / or different hardnesses or different rebound elasticities are achieved, in particular by means of a macroscopic material density that is set by means of the distribution of the pores, cavities and / or chambers as well as the webs, thin sheets and / or material bridges.

[0023] Such an "internal structure" is understood here to mean, for example, an intentionally introduced, geometrically defined or geometrically indeterminate arrangement of missing parts in the material, wherein essentially circular missing parts, such as pores, geometrically larger "cavities" or even "chambers", as well as desired geometrically defined missing parts can be introduced. The corresponding material areas, i.e. webs, lamellae and / or material bridges, determine the corresponding mechanical properties by their type. In this context, "macroscopic material density" means, for example, the material density observed over the entire support body and / or entire support body sections, wherein the local material density varies naturally, for example due to a high material density inside the webs and a low material density inside the cavities (which can drop to 0).

[0024] Thus, the stator can be provided, for example, in regions with spring elements or elastic supporting elements.

[0025] In particular, the internal structure can be designed to be approached in a fluid-conducting manner by means of a pressurized fluid supply device or multiple pressurized fluid supply devices, wherein the pressure-induced force on the running body is increased by introducing the pressurized fluid into the pores, cavities and / or chambers of the internal structure by means of a pressurized fluid supply device or multiple pressurized fluid supply devices, and / or the pressurized force on the running body is reduced by withdrawing the pressurized fluid from the pores, cavities and / or chambers of the internal structure by means of a pressurized fluid supply device or multiple pressurized fluid supply devices.

[0026] For example, the hardness and / or flexibility of the stator (also at certain points or sections) can be adjusted as required by adjusting the pressure and / or volume of the pressure fluid in the internal structure. In particular, the properties of the stator can also be adjusted in a pressure-adaptive manner along the delivery direction, so that when the pressure in the pump increases along the delivery direction, an adapted reaction force of the stator can also be set on the rotor.

[0027] In this context, a "pressurized fluid supply device" is, for example, a valve, a pressure connection or an opening, in particular with a non-return valve or a controllable valve, which can supply a fluid referred to as "pressurized fluid", i.e., for example, a gas or a liquid. Thus, by means of a correspondingly set pressure in the internal structure, a corresponding behavior of the stator can be brought about.

[0028] For this purpose, an "intake", ie supply of pressure fluid to increase or maintain the pressure, or an "extraction", ie removal of pressure fluid to reduce or maintain the pressure, occurs, both depending on the deformations applied at various points, for example by the rotor of the stator.

[0029] In particular, the pressurized fluid supply device or the pressurized fluid supply devices are assigned a control device for controlling the introduction and / or withdrawal of pressurized fluid through the pressurized fluid supply device.

[0030] Thus, for example, in a section along the conveying direction, the pressure and the pressurized fluid and thus the corresponding mechanical behavior of the stator can be adjusted.

[0031] A “control device” in this case is, for example, an electronic control unit with a valve block controlled thereby, in order to control or regulate the pressure, for example as a function of a pressure sensor.

[0032] In one embodiment, the support body and / or in particular the corresponding support body parts and / or the running body are produced by means of a one-shot material forming process, in particular by means of an additive process and / or by means of a sintering process.

[0033] In particular, the one-shot material forming process can produce a corresponding material density distribution directly in the production of the stator, for example in the case of additive processes, produce a local production density of the material and / or produce the base body from different granular raw materials by means of a sintering process.

[0034] A "material forming process" is understood here to mean a process in which the material together with the workpiece is formed from a base material, a matrix or, for example, a powder or granules, in particular by physical action. For example, TPE granules can be used here for the reasons mentioned above. An "additive process" is referred to here, for example, as "3D printing", i.e., for example, a thermoplastic application process, a laser sintering process or the like. A "sintering process" is understood to mean a process under pressure and high temperature, usually based on metal powders, in which the material consisting of individual particles is locally pressed and bonded together, but without completely melting the raw material.

[0035] In particular, the common material can comprise further materials, wherein different material densities are further varied, in particular additionally by means of corresponding proportions of the further materials in the support body, in the individual support body parts and / or in the running body.

[0036] Here, for example, "additional materials" such as fillers, abrasives and / or other substances for locally influencing material properties can be used. For example, ceramic powder can be added to the running body in order to combine a high density of the running body with corresponding wear resistance. Sliding particles (such as graphite particles or TPFE particles, the material TPFE referred to below is also called Teflon) can also be introduced to reduce sliding friction.

[0037] In one embodiment, the universal material comprises a plastic, in particular an elastomer, a thermoplastic elastomer, a thermosetting material and / or a thermoplastic material and / or a metal, in particular steel, aluminum and / or titanium.

[0038] On the other hand, the object is achieved by a method for producing a stator for a pump, in particular according to one of the above-mentioned embodiments, wherein the stator has a base body, the base body having a support body and a running body, the base body surrounding a pump chamber for a rotor of the pump, and the running body forming a running surface for at least partial contact with the rotor of the pump, wherein the base bodies have different material densities from one another, the method comprising the following steps:

[0039] - introducing a material substrate into the manufacturing space so that the material substrate is present in the manufacturing space,

[0040] - processing of a material substrate in the manufacturing space, wherein the material substrate is transformed into a common material by means of the processing, and wherein the processing of a first manufacturing space for manufacturing a support body and the processing of a second manufacturing space for manufacturing a running body are performed in a different manner, so that the material density of the material of the support body and the material density of the material of the running body are set to be different from each other,

[0041] The stator is thus produced in such a way that different elasticities and / or different hardnesses of the material in the support body and in the running body are achieved by means of differently set material densities.

[0042] In this context, “introducing” a material substrate into a manufacturing space refers to providing a “material substrate” in the manufacturing space, such as a raw material filament for 3D printing and / or a sintering powder for a sintering process, wherein the manufacturing space in this case is, for example, a 3D printer, a sintering mold or a similar device.

[0043] "Processing" in this context refers to an action on the material substrate, such as in the case of 3D printing, by means of heating and applying a filament, or, for example, by means of irradiating a laser onto a powder or granules, such that the material substrate is transformed into a common material, such as melting. In a similar manner, processing during sintering is performed by means of applying pressure and / or heat.

[0044] The result is that a stator is then produced as described above, wherein the support body and the running body have, in particular, different material densities.

[0045] In particular, the processing is carried out here by means of a one-step forming process of the material formation, in particular by means of an additive process and / or by means of a sintering process. In particular, in this case, in the common production process, i.e. in the production of the entire base body, individual production parameters are adjusted to produce different material densities. For example, the local pressure, the laser effect, the temperature or the geometric arrangement of the respective material regions can be adjusted.

[0046] On the other hand, the object is achieved by a stator for a pump produced by means of this method.

[0047] In this context it should be noted that in addition to the manufacture of a stator according to the invention, the manufacture of a pump rotor is equally encompassed, for example if for a specific design of the pump the different properties of the material on the pump rotor are similar to the various embodiments of the stator shown, then these embodiments are valid for the manufacture of the pump rotor.

[0048] According to a further aspect, the object is achieved by a pump, in particular a rotary piston pump and / or an eccentric screw pump, having a stator and / or a rotor according to one of the above embodiments and / or wherein the stator and / or the rotor is produced by means of a method as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention is explained in more detail with reference to the examples. Shown therein are:

[0050] Figure 1 is a schematic side sectional view of a rotary piston pump,

[0051] Figure 2 is a schematic side sectional view of an eccentric screw pump.

[0052] Figure 3 yes Figure 1 A schematic cross-sectional view of a stator of a rotary piston pump, and

[0053] Figure 4 yes Figure 2 Schematic cross-sectional view of the stator of an eccentric screw pump. DETAILED DESCRIPTION

[0054] The rotary piston pump 101 has a housing 102 having two housing parts 103 and 104. An inner space 111 is formed by a stator 105 in the housing part 103 and a stator 106 in the housing part 104, in which a rotary piston 121 and a rotary piston 123 are rotatably arranged along respective rotation directions 171 and 173. The rotary piston 121 and the rotary piston 123 are arranged in opposite directions to each other and are used to pump a liquid in the oval housing 102 along a delivery direction 181. The corresponding liquid is supplied in the inlet 161, pumped in the inner space 111 by means of the rotary piston 121 and the rotary piston 123, and discharged through the outlet 163.

[0055] The internal structure of the stator 105 is shown as an example, and the internal structure of the stator 105 is the same as the structure of the stator 106 .

[0056] It should be noted here that each rotary piston 121 and rotary piston 123 seeks good wear behavior through hard surfaces, while the basic structure of each stator should be designed to be elastic, and each rotary piston can be close to it, so that the rotary piston pump has good sealing and therefore high efficiency.

[0057] The stator 105 has a support layer 321 facing the housing part 103, followed by a support structure 323 in the direction of the rotary piston 121 and a running layer 325 facing the rotary piston 121. The stator is manufactured by means of a 3D printing process, wherein the support layer 321 with medium density and medium elasticity is manufactured by means of this process. The support structure 323 has intentionally introduced free spaces 324, which produces a truss-like structure with high elasticity and increased deformation resistance. In addition, the running layer 325 is formed using high density and additives to increase wear resistance, so that the running side 363 facing the rotary piston 121 is designed to be wear-resistant, and the housing side 361 facing the housing part 103 is correspondingly elastic and deformable. It should be noted that the structure of the stator can be realized similarly to the structure of the rotary piston, wherein in this case, the rotary piston is realized similarly to the above-mentioned stator. Thus, the surface of the rotary piston can also be constructed similarly to the structure of the stator 105, i.e. as an elastic structure created by 3D printing, wherein the stator is made of stainless steel, for example. Thus, for example, the axial sealing can also be improved by the rotary piston also having a corresponding elastic surface in the axial direction.

[0058] The eccentric screw pump 201 has a first housing part 203 and a pump housing 204. A motor 231 is arranged outside the housing part 203, and the motor 231 drives a shaft 235 via a gear 233. The shaft 235 is connected to the eccentric screw 237 in a form-fitting manner. Alternatively, a joint can also be used for connection. The eccentric screw 237 is arranged in the pump housing 204 and is arranged to rotate around the rotation direction 271 in the elastic stator 205. Here, the eccentric screw 237 and the stator 205 are both designed to meander on the circumference, so that when the eccentric screw 237 rotates, the liquid is pumped from the inner space 211 in the housing part 203 through the pump chamber 213 in the pump housing 204 along the delivery direction 281. Therefore, the liquid can be sucked in through the inlet 261 at the housing part 203 and pumped to the outlet 263 along the pump chamber 213.

[0059] Stator 205 (see Figure 4 ) has different densities and different structures over its entire volume, but is made of a common material. The stator 205 is made of an elastomer here.

[0060] The stator 205 has a projection 427 on the housing side 461, which is used for positive insertion into the pump housing 204; a support layer 221 with medium density is produced on the housing side. A support structure 423 is then arranged in the direction of the eccentric screw 237 similarly to the support structure 323, wherein a free space 424 is also provided here. Therefore, the support structure 423 is also designed in a truss-like manner. The layer 425 facing the eccentric screw 237 is designed on the running side 463 with high density and thus high wear resistance.

[0061] The stator 205 is manufactured using a 3D printing process, wherein layers and structures of different densities are created by setting corresponding printing parameters. In the region of the support structure 423, a truss structure is created by omitting material. It should be noted at this point that the stator 205 can also have chambers (not shown) bounded by the support structure 423 inside it, wherein, for example, a plurality of chambers are arranged along the conveying direction 281 of the eccentric screw pump 201, and compressed air can be applied in different ways from each other by means of a compressed air connection (not shown), and the hardness of the chamber can therefore be adjusted. Therefore, for example, the elastic behavior of the stator 205 can be freely adjusted within a wide range. For example, the hardness of the stator 205 can also be set to gradually increase, thereby offsetting the pressure increased in the eccentric screw pump 201 along the conveying direction 281.

[0062] Reference numerals list

[0063] 101 Rotary Piston Pump

[0064] 102 Housing

[0065] 103 Shell part

[0066] 104 Shell part

[0067] 105 Stator

[0068] 106 Stator

[0069] 111 Interior Space

[0070] 121 Rotary piston

[0071] 123 Rotary Piston

[0072] 161 Entrance

[0073] 163 Exit

[0074] 171 Rotation direction

[0075] 173 Rotation direction

[0076] 181 Conveying direction

[0077] 201 Eccentric Screw Pump

[0078] 203 Shell part

[0079] 204 Pump housing

[0080] 205 Stator

[0081] 211 Interior Space

[0082] 213 Pump Room

[0083] 231 Motor

[0084] 233 Gear

[0085] 235 Axis

[0086] 237 Eccentric screw

[0087] 261 Entrance

[0088] 263 Exit

[0089] 271 Rotation direction

[0090] 281 Conveying direction

[0091] 321 Support layer

[0092] 323 Support structure

[0093] 324 Free Space

[0094] 325 Operational Layer

[0095] 361 Shell side

[0096] 363 Operation side

[0097] 421 Support layer

[0098] 423 Support structure

[0099] 424 Free Space

[0100] 425 Operational Layer

[0101] 427 Protrusion

[0102] 461 Shell side

[0103] 463 Operation side

Claims

1. A stator (105, 106, 205) for a pump (101, 201), the pump (101, 201), in particular for a rotary piston pump (101) or an eccentric screw pump (201), the stator (105, 106, 205) having a base body (321, 323, 325, 421, 423, 425, 427), wherein: The base body (321, 323, 325, 421, 423, 425, 427) surrounds a pump chamber (111, 213) of a rotor device (121, 123, 273) for a pump (101, 201) and comprises a support body (321, 323, 421, 423) and a running body (325, 425), wherein the running body (325, 425) forms a running surface for at least partial contact with the rotor device of the pump (101, 201), characterized in that the support body The support body (321, 323, 421, 423) and the running body (325, 425) have a common material, and the material density of the material of the support body (321, 323, 421, 423) and the material density of the material of the running body (325, 425) are set to be different from each other, so that different elasticities and / or different hardnesses of the materials in the support body (321, 323, 421, 423) and in the running body (325, 425) are achieved by means of the differently set material densities.

2. The stator according to claim 1, characterized in that: The material density of the running body (325, 425) is higher than the material density of the supporting body (321, 323, 421, 423), so that the running body (325, 425) has lower elasticity and / or higher hardness than the supporting body (321, 323, 421, 423).

3. The stator according to claim 1 or 2, characterized in that: The support body (321, 323, 421, 423) comprises a first support body part (321, 421), a second support body part (323, 423), a third support body part (427) and / or another support body part, wherein the material density of the material of each support body part (321, 323, 421, 423, 427) is set to be different from each other, so that by means of the different set material density, different elasticity and / or different hardness of the material in the corresponding support body part (321, 323, 421, 423, 427) is achieved relative to the corresponding other support body parts (321, 323, 421, 423, 427), wherein in particular, the each support body part (321, 323, 421, 423, 427) is arranged in a layer arranged basically radially around the pump chamber (111, 213).

4. A stator according to any one of the preceding claims, characterised in that The support body (321, 323, 421, 423) and / or in particular the corresponding support body parts (321, 323, 421, 423, 427) have an internal structure (323, 324, 423, 424), wherein the internal structure (323, 324, 423, 424) has pores, cavities (324, 424) and / or chambers as well as webs, thin films (323, 423) and / or material bridges, wherein different elasticities and / or different hardnesses of the materials in the support body (321, 323, 421, 423) and in the running body are achieved, in particular by means of a macroscopic material density set by the distribution of the pores, cavities (324, 424) and / or chambers as well as webs, thin films (323, 423) and / or material bridges.

5. The stator according to claim 4, characterized in that: The internal structure (323, 324, 423, 424) is designed to be approached in a fluid-conducting manner with the aid of a pressurized fluid supply device or multiple pressurized fluid supply devices, wherein the pressurized fluid is introduced into the pores, cavities (324, 424) and / or chambers of the internal structure (323, 324, 423, 424) by means of a pressurized fluid supply device or by means of multiple pressurized fluid supply devices to increase the pressurized induced force on the running body, and / or, the pressurized fluid is drawn out from the pores, cavities (324, 424) and / or chambers of the internal structure (323, 324, 423, 424) by means of a pressurized fluid supply device or by means of multiple pressurized fluid supply devices to reduce the pressurized induced force on the running body.

6. The stator according to claim 5, characterized in that: The pressurized fluid supply device or the pressurized fluid supply devices are assigned control devices for controlling the introduction and / or withdrawal of pressurized fluid through the pressurized fluid supply devices.

7. A stator according to any one of the preceding claims, characterised in that The support body (321, 323, 421, 423) and / or in particular the corresponding support body parts (321, 323, 421, 423, 427) and / or the running body (325, 425) are manufactured by means of a one-step molding process of material formation, in particular by means of an additive process and / or by means of a sintering process.

8. A stator according to any one of the preceding claims, characterised in that The common material comprises a further material, wherein, in particular, different material densities are additionally varied in the respective supporting body parts (321, 323, 421, 423, 427) and / or in the running body (325, 425) by means of a corresponding proportion of the further material in the supporting body (321, 323, 421, 423).

9. A stator according to any one of the preceding claims, characterised in that The universal material comprises plastic, in particular an elastomer, a thermosetting plastic and / or a thermoplastic, and / or metal, in particular steel, aluminum and / or titanium.

10. A method for producing a stator (105, 106, 205) for a pump (101, 201), in particular according to any one of the preceding claims, wherein: The stator (105, 106, 205) comprises a base (321, 323, 325, 421, 423, 425, 427), wherein the base (321, 323, 325, 421, 423, 425, 427) comprises a support body (321, 323, 421, 423) and a running body (325, 425), wherein the base (321, 323, 325, 421, 423, 425, 427) comprises a support body (321, 323, 421, 423) and a running body (325, 425). 25, 427) surrounds a pump chamber (111, 213) for a rotor of the pump (101, 201), and the running body (325, 425) forms a running surface for at least partial contact with the rotor of the pump (101, 201), wherein the base bodies (321, 323, 325, 421, 423, 425, 427) have different material densities from one another, and the method comprises the following steps: - introducing a material substrate into the manufacturing space so that the material substrate is present in the manufacturing space, - processing of a material substrate in a manufacturing space, wherein the material substrate is transformed into a universal material by means of the processing, and wherein the support (321, 323, 421, The processing of the first manufacturing area of ​​the support body (321, 323, 421, 423) and the processing of the second manufacturing area for manufacturing the running body (325, 425) are performed in different ways, so that the material density of the material of the support body (321, 323, 421, 423) and the material density of the material of the running body (325, 425) are set to be different from each other, The stator (105, 106, 205) is thus manufactured in such a way that different elasticities and / or different hardnesses of the material in the support body (321, 323, 421, 423) and in the running body (325, 425) are achieved by means of differently set material densities.

11. The method according to claim 10, characterized in that The processing comprises a primary shaping process of material formation, in particular an additive process and / or a sintering process, wherein the processing is realized in a common production process, in particular by means of adjustment of individual production parameters.

12. A stator (105, 106, 205) for a pump (101, 201), in particular according to any one of claims 1 to 9, the stator (105, 106, 205) being produced by means of the method according to claim 10 or 11.

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