Rotor device, valve and method for assembling rotor device

Abstract

The present invention is based on a rotor device (52a-c), in particular a stepper motor rotor device, which has at least one hollow body (10a-c), in particular a pressure tube (12a-c) of a valve (14a-c), and at least one rotor assembly group (16a-c) fixed in the hollow body (10a-c), in particular at least partially in a rotationally fixed and translationally fixed manner, the rotor device (52a-c) comprising at least one rotor element (18a-c), which is at least configured to convert magnetic field changes into rotational movements of the rotor element (18a-c), further comprising a support element (20a-c), which is at least configured as a rotational support of the rotor element (18a-c), and comprising at least one fixing element (22a-c), which is at least configured to fix the rotor assembly group (16a-c) in the hollow body (10a-c), in particular in the pressure tube (12a-c). The present invention proposes that the support element (20a-c) is arranged in the hollow body (10a-c) in such a way that at least an axial force pulling toward the rotor element (18a-c) and / or an axial force pulling and pressing the support element (20a-c) in at least two opposite directions can be transmitted through the support element (20a-c).

Description

Technical Field

[0001] The invention relates to a rotor arrangement according to the preamble of claim 1 , a valve according to claim 15 and a method for assembling a rotor arrangement according to the preamble of claim 17 . Background Art

[0002] A rotor device having at least one hollow body and at least one rotor assembly group fixed in the hollow body has been proposed, comprising at least one rotor element, which is at least configured to convert a magnetic field change into a rotational movement of the rotor element, further comprising a support element configured at least as a rotational support of the rotor element, and comprising at least one fixing element, which is at least configured to fix the rotor assembly group in the hollow body. The rotor devices known in the art can only accept axial pressure.

[0003] The object of the invention is in particular to provide a universal device with advantageous support properties for a support of a rotor. According to the invention, this object is achieved by the features of patent claims 1, 15 and 17, while advantageous embodiments and further developments of the invention can be gathered from the dependent claims. Summary of the invention

[0004] The present invention is based on a rotor device, specifically a stepper motor rotor device, having at least one hollow body, specifically a pressure pipe of a valve, and at least one rotor component group, which is fixed in the hollow body, specifically fixed in the hollow body in a rotationally fixed and translationally fixed manner. The rotor device includes at least one rotor element, which is at least configured to convert magnetic field changes into rotational movement of the rotor element. The rotor device further includes a support element, which is at least configured as a rotational support of the rotor element, and includes at least one fixing element, which is at least configured to fix the rotor component group in the hollow body, specifically in the pressure pipe.

[0005] It should be noted that the support element is arranged in the hollow body in such a way that at least axial forces pulling toward the rotor element and / or axial forces pulling and pressing the support element in at least two opposite directions can be transmitted through the support element. In this way, advantageous support characteristics of the support of the rotor element can be achieved. In this way, advantageous support characteristics of the support of the rotor element can be achieved. In particular, this advantageously achieves damage-free and / or at least substantially axial tolerance-free reception and / or transmission of forces generated when the rotational movement of the rotor element is converted into an axial movement of another element operatively connected to the rotor element, for example, driven by a spindle in the use of a rotor device for switching valves. The so-called reception and / or transmission of "substantially damage-free" forces should be understood in particular to mean that the pulling and / or pressing axial forces that usually occur in the normal operation of the rotor device reduce the rated life of the support element of the rotor device by a maximum of 25%, preferably by a maximum of 10%, and preferably by less than 1%, in particular when compared with the operation of the support element without substantially pulling and / or pressing axial forces. By receiving and / or transmitting forces "essentially without tolerances" is meant in particular that the maximum possible axial movement of the rotor element, caused by the pulling and / or pressing axial forces which usually occur in normal operation of the rotor arrangement, is less than 0.3 mm, preferably less than 0.2 mm, advantageously less than 0.1 mm, preferentially less than 0.05 mm. Furthermore, the transmissibility of pulling axial forces, in particular pulling and pressing axial forces, advantageously allows the possibility of developing a multitude of new applications of the rotor assembly, in which pulling axial forces may occur. In addition to this, a high degree of operational safety and / or reliability, in particular with a low downtime rate, can also be achieved.

[0006] The so-called "rotor device" specifically refers to a part of a motor and / or an assembly (preferably a part of an electric stepper motor), which is configured to rotate and / or generate a rotational motion of a part of a motor and / or an assembly, for example, a rotor and / or a stator of an electric stepper motor. The electric stepper motor can be implemented as a reluctance stepper motor, a permanent magnet stepper motor or a hybrid stepper motor. The electric stepper motor can be implemented as a reluctance stepper motor, a permanent magnet stepper motor or a hybrid stepper motor. Preferably, the rotor device includes a rotor and a stator of the motor and / or the assembly. The motor and / or the assembly (preferably an electric stepper motor) is specifically configured to drive a valve driven by a stepper motor. The motor and / or the assembly (preferably an electric stepper motor) is specifically configured to realize a driver of an expansion valve and / or a shut-off valve in an air conditioning cycle and / or a cooling cycle (for example, a carbon dioxide cooling cycle of a motor vehicle). The so-called "hollow body", specifically a pressure tube, should be specifically understood as a component that separates the internal space, specifically the rotor space of the assembly (preferably an electric stepper motor), from the environment, specifically the stator space of the assembly (preferably an electric stepper motor) in a pressure-tight manner. Specifically, the interior of the hollow body (specifically the pressure tube) is configured to be flowed by a fluid, such as a gas and / or a liquid. Specifically, during normal operation of the rotor device, the gas and / or liquid in the hollow body is subjected to an overpressure significantly exceeding at least 1 bar. In addition, the gas and / or liquid in the hollow body can withstand a negative pressure during normal operation of the rotor device, which is significantly lower than a value of at least 1 bar, or can withstand atmospheric pressure. Specifically, the hollow body is implemented in a tubular shape, and its cross-section is at least substantially circular. Specifically, the hollow body is implemented by a plastically deformable material, such as a metal such as steel, copper or aluminum.

[0007] The rotor assembly group is specifically arranged at least partially, preferably completely, inside the hollow body, preferably in the hollow space of the hollow body. By the rotor assembly group "at least partially fixed in a rotationally fixed manner in the hollow body", it should be understood that at least a part of the rotor assembly group is in contact with the hollow body and / or connected to the hollow body in such a way that a rotation of a part of the rotor assembly group relative to the hollow body is excluded, specifically a non-destructive rotation, specifically a torque that can be expected in normal operation. The so-called rotor assembly group "at least partially fixed in a translationally fixed manner in the hollow body" should be understood that at least a part of the rotor assembly group is in contact with the hollow body and / or connected to the hollow body in such a way that a displacement of a part of the rotor assembly group relative to the hollow body is excluded, specifically a non-destructive displacement, specifically with an axial force expected in normal operation. The rotor assembly group specifically includes at least a rotor of a motor and / or an assembly, specifically a rotor of an electric stepper motor. The stator of the motor and / or the assembly, specifically a stator of an electric stepper motor, is specifically implemented separately from the rotor assembly group. The stator of the motor and / or the assembly, in particular the stator of the electric stepper motor, is in particular arranged at least partially, preferably completely, outside the hollow body, in particular the pressure conduit. In particular, the rotor assembly group is implemented separately from the output shaft. In particular, the rotor assembly group has an output side. In particular, the output element, in particular the output shaft, can be arranged on the output side of the rotor assembly group.

[0008] The rotor element is implemented in particular as a component of a rotor of a motor and / or an assembly, in particular an electric stepper motor. The rotor element is implemented in particular as a component of a rotor assembly group, which is rotatable relative to the hollow body. In particular, the rotor element is at least partially, preferably at least mostly, implemented by a soft magnetic material, such as soft iron. In particular, the rotor element forms a soft iron core. Alternatively or optionally, the rotor element can be implemented at least partially, preferably at least mostly, by permanent magnets. "At least mostly" specifically refers to at least 51%, preferably at least 66%, advantageously at least 75%, preferentially at least 85%, and particularly preferentially at least 95%. In particular, the rotor element has a toothed surface in a circumferential direction perpendicular to a designated rotation axis of the rotor element, wherein the distance between the teeth of the toothed surface defines the step length of the stepper motor. In particular, the rotor element is configured to provide an accuracy of at least 50 steps per revolution, preferably at least 100 steps, preferentially at least 200 steps, particularly preferentially at least 350 steps. Specifically, the rotor diameter of the rotor element is at least 5 mm, preferably at least 8 mm, advantageously at least 12 mm, preferentially at least 15 mm, particularly preferentially a maximum of 20 mm. Specifically, the rotor element is concentrically arranged in the hollow body. Specifically, the rotation axis of the rotor element is at least substantially parallel to the main extension direction of the hollow body. "Substantially parallel" here specifically refers to a direction relative to a reference direction, specifically in a plane, wherein the deviation of the direction from the reference direction is in particular less than 8°, advantageously less than 5°, particularly advantageously less than 2°. The rotor element converts "magnetic field changes into rotational motion", which should be understood specifically as the rotor element being configured to align itself rotationally around the rotation axis relative to a magnetic field applied from the outside (for example, a magnetic field applied by a stator).

[0009] The support element is specifically configured to enable the rotational position of the rotor element around the axis of rotation to change, and at the same time fix the spatial position of the rotation axis relative to the hollow body. Specifically, the support element is arranged near the fixed point of the rotor assembly group, wherein the rotor assembly group is fixed in the hollow body. Specifically, the fixed point, the support element is arranged near it, which is arranged on the side of the rotor assembly group, which is far away from the output side of the rotor assembly group. In this case, "near" specifically refers to the spatial area that needs to be understood, specifically refers to the point of implementation, and in each case the minimum distance between the point of implementation and the fixed point is a maximum of 100 mm, advantageously a maximum of 50 mm, preferably not more than 30 mm, and particularly preferably not more than 10 mm. "Fixed point" specifically refers to the contact point between a part of the rotor assembly group (specifically the fixed element of the rotor assembly group) and the hollow body, which realizes the fixation of the rotor assembly group in the hollow body. The fixed element is specifically configured to fix at least a part of the support element (specifically the outer ring of the ball bearing) relative to the hollow body in a rotationally fixed and / or translationally fixed manner. The fixed element is implemented separately from the support element. In addition, it is conceivable that the fixing element and the supporting element are implemented in one piece. "Integration" specifically refers to at least a connection by a combination of substances (for example, by a welding process, a gluing process, an injection molding process and / or other processes deemed suitable by a person skilled in the art) and / or is conducive to integral molding, for example, by production from a casting and / or by production in a single-component or multi-component injection molding process, and advantageously consists of a single blank. The fixing element specifically includes a bearing seat. The bearing seat is specifically configured to receive the supporting element. The bearing seat is specifically configured to receive the supporting element by a press fit. The bearing element is specifically configured to be a bearing seat pressed into the fixing element by a press fit. The outer ring of the supporting element is specifically configured to be a bearing seat pressed into the fixing element by a press fit. "Configuration" specifically refers to specific programming, design and / or equipment. An object configured for a certain function should specifically be understood as the object realizing and / or performing the specific function described in at least one application state and / or operating state.

[0010] By "axial force", it is meant in particular a force acting in a direction at least substantially parallel to the axis of rotation of the rotor element. By "axial force pulling towards the rotor element", it is meant in particular an axial force whose force vector points in a direction away from the output side of the rotor assembly group. By "transmissible pulling axial force", it is understood that the support element is capable of receiving the pulling axial force (which is in particular impacted at the inner ring of the support element) while remaining intact and / or undamaged and / or maintaining its full functionality, and the support element is capable of transmitting the axial force to the fixing element and / or the hollow body, in particular through the outer ring of the support element, and the transmittable and / or receivable axial force (in Newton) is in particular at least greater than 5 times (in millimeters) of the maximum diameter of the rotor assembly group, preferably greater than 10 times (in millimeters), advantageously greater than 15 times, preferably greater than 20 times (in millimeters), and particularly preferably greater than 25 times. In particular, the transmittable and / or receivable axial force is at least greater than 150N, preferably at least greater than 200N, and preferably greater than 250N.

[0011] Furthermore, the invention proposes that the rotor assembly group has no further support elements, in particular support elements implemented as ball bearings, rotary plain bearings or axial plain bearings, which are capable of transmitting axial forces, at least on the output side of the rotor assembly group. In this way, a particularly simple structure of the rotor assembly group can be advantageously achieved, so that the costs are kept at an advantageously low level. In addition, particularly small axial tolerances of the rotor are advantageous, in particular in the case of a change of direction between the movement of the rotor element generating the axial force and the movement of the rotor element generating the pressing force, and / or in the case of a change of the direction of rotation of the rotor element. In particular, it is possible to maintain a small axial tolerance, because the superposition of two tolerances of two support elements is advantageous by means of a tolerance chain. This advantageously achieves high precision and / or precise adjustability of the device, in particular a valve, which is controlled by an aggregate and / or a motor, in particular by a stepper motor. In particular, the rotor assembly group has no further counter-bearings, which are configured to support the rotor element against pulling axial forces, wherein in particular the output element (in particular the output shaft), the support on the side of the output element (in particular the output shaft) facing away from the rotor element is not regarded as such a counter-bearing.

[0012] Furthermore, the invention proposes that the radial distance from the rotating surface of the rotor element described in a 360-degree rotation (particularly around the rotation axis) to the hollow body is at most 4.5%, preferably 4%, preferentially 3%, and particularly preferentially 2% of the maximum diameter of the rotating surface and / or the radial distance is at most 0.3 mm. In this way, a wider range of torques achievable by the rotor assembly group can be advantageously obtained, in particular because the radial air gap between the rotor and the inner wall of the hollow body can be kept in an advantageously small range.

[0013] The invention further proposes that on at least one surface, in particular on the radially outer side, the fixing element has at least one deepening, which is configured to enable the rotor assembly group to be fixed in the hollow body, in particular rotationally fixed and translationally fixed, by engaging at least a part of the hollow body in the deepening. This is conducive to achieving a good fixation of the rotor assembly group in the hollow body. In addition, the precise positioning of the rotor assembly group in the hollow body is advantageous, in particular compared to the rotor assembly group pressed into the hollow space, for example by overlapping the deepening with the protrusion and / or mark of the hollow body, and / or if the position of the rotor assembly group in the hollow body can be measured first and then fixed. Advantageously, the installation of the rotor assembly group in the hollow body is measurable. The deepening is preferably implemented as an elongated deepening. In addition, the deepening can be implemented as a dot-shaped, circular and / or polygonal deepening. In particular, the fixing element has at least one further deepening. This advantageously achieves simplified positioning and / or anti-slip fixation. Specifically, the deepening portions are arranged at regular or irregular distances in the circumferential direction around the fixed element. Specifically, the engagement of the part of the hollow body with the deepening portion is produced by plastic deformation of the hollow body, such as bending, caulking and / or crimping. Specifically, the deepening portion is configured to form a shape-fitting connection with the hollow body, which is specifically to fix the rotor assembly group, preferably at least the fixed element, in the interior of the hollow body in a rotationally fixed and / or translationally fixed manner. The shape-fitting connection between the hollow body and the rotor assembly group (specifically the fixed element) is specifically configured to support the axial force acting on the rotor assembly group (specifically the supporting element), and / or release and / or transfer the axial force to the hollow body. In this way, it is advantageous to achieve that the tolerance of the rotor assembly group is only limited by the tolerance of the supporting element. The deepening portion in the fixed element is specifically arranged in the area of ​​the fixed element, which area does not overlap with the area of ​​the bearing seat of the fixed element. Specifically, in the direction of the specified rotation axis of the rotor element and / or the supporting element, the deepening portion in the fixed element is arranged above the bearing seat. Alternatively, the fixing element may also be free of the deepening, and the fixing element may be connected to the hollow body by welding (in particular, laser welding and / or gluing).

[0014] In addition, the invention proposes that the deepening in the fixing element forms a recess. In this way, an optimal arrangement of the rotor assembly group in the hollow body can be achieved. In particular, an inclined positioning of the rotor assembly group in the hollow body can be advantageously avoided. Furthermore, an exact positioning of the initial rotation direction of the rotor assembly in the hollow body can also be advantageously achieved. In particular, the recess is shaped as a perforation and / or a bead.

[0015] The invention further proposes that the fixing element (in particular the rotor assembly with the fixing element) is introduced into the hollow body by means of a transition fit (in particular a slight interference fit or a close tolerance fit). In this way, damage to the support element during the introduction of the rotor assembly (in particular the fixing element) into the hollow body is advantageous, in particular since the forces acting on the support element during assembly can be kept at an advantageously low level. Furthermore, it is advantageous that a particularly precise positioning of the rotor assembly (in particular the fixing element) in the hollow body can be achieved, which also advantageously allows a simple subsequent correction if the rotor assembly (in particular the fixing element) is inserted inaccurately into the hollow body during assembly, for example too deep. "Interference fit" refers in particular to a fit of the outer shape of the fixing element and the inner shape of the hollow body relative to one another, which allows the fixing element to be introduced into the hollow body with a maximum required press-in force (in Newtons) of less than 25 times, preferably less than 20 times, advantageously less than 15 times, preferably less than 10 times, particularly preferably less than 5 times (in millimeters) the maximum diameter of the rotor assembly. In particular, the maximum press-in force required for introducing the fixing element into the hollow body by means of the transition fit is less than 150 N, preferably less than 200 N, preferentially less than 250 N. Preferably, the maximum press-in force required for introducing the fixing element into the hollow body by means of the transition fit is less than the maximum pulling and / or pressing axial force expected to act on the support element during normal operation of the rotor arrangement. According to DIN 7157:1966-01, the transition fit is in particular an H7j6 fit, preferably an H7h6 fit according to DIN 7157:1966-01, preferentially an H7g6 fit according to DIN 7157:1966-01, particularly preferentially an H7f7 fit according to DIN 7157:1966-01.

[0016] If the support element is implemented as a ball bearing, in particular a groove ball bearing, a double row inclined ball bearing and / or a four-point bearing, a double row tapered roller bearing and / or a rotary plain bearing, in particular a rotary plain bearing with a fixing ring for axially fixing at least the inner ring of the rotary plain bearing to the rotor element. Advantageously, at least axial forces pulling toward the rotor element can be transmitted and / or received. Advantageously, the support element realized in this way can receive and / or transmit axial forces in two axial directions. The fixing ring is specifically embodied as a Seeger ring. With ball bearings and / or tapered roller bearings, rotation with particularly low friction is advantageously allowed.

[0017] Furthermore, the invention also proposes that the support element comprises an outer ring and an inner ring, the inner ring being at least configured to receive an axial force from the rotor element, and the outer ring being at least configured to transmit the axial force received by the inner ring to the fixed element and / or the hollow body. In this way, it is particularly possible to provide advantageous support characteristics for the support of the rotor element. The outer ring and the inner ring are preferably arranged concentrically with each other. In particular, the outer ring completely includes the inner ring in the circumferential direction. During the assembly of the rotor device, the outer ring is particularly configured to be pressed into the bearing seat of the fixed element, preferably by an interference fit. In the assembled state of the rotor assembly group, the outer ring is particularly pressed into the bearing seat of the fixed element, preferably by an interference fit. The outer ring is particularly configured to receive forces acting on the inner ring from the inner ring, which are transmitted through the balls of a ball bearing or the cone of a tapered roller bearing, etc. The outer ring is particularly configured to support the forces transmitted by the inner ring on the fixed element and / or the hollow body. During the assembly of the rotor device and the rotor element, the inner ring is particularly configured to be pressed in, preferably by an interference fit. In the assembled state of the rotor assembly, at least a portion of the rotor element is pressed into the inner ring, in particular into a central recess of the inner ring, preferably by an interference fit.

[0018] If the support element and the rotor element and / or the support element and the fixing element are inseparably connected to each other in a non-destructible manner, specifically pressed against each other by an interference fit, a rotor assembly group with advantageous support characteristics can be achieved, which is specifically able to withstand pulling and pressing axial forces. The so-called "indestructibly connected to each other" can be understood as the components being connected to each other in such a way that the separation of the components will cause at least one of the previously connected components to be partially destroyed. Specifically, the outer ring of the support element is inseparably connected to the fixing element and / or the hollow body, and the inner ring of the support element is inseparably connected to the rotor element. The so-called "interference fit" specifically refers to a fit in which, in a non-pressed state, the maximum size of the recess of the first component is smaller than the maximum size of the connecting part of the second component, wherein, in order to connect the first component and the second component, the connecting part of the second component is pressed into the recess of the first component.

[0019] Furthermore, it should be noted that the support element is arranged on a side of the rotor element, which faces away from the output of the rotor assembly group (specifically the output shaft). In this way, a rotor assembly group with advantageous support characteristics can be achieved. Advantageously, this allows obtaining a rotor element that is advantageous for real operation. Specifically, the rotor assembly group has no further support elements near the side of the rotor element facing the output. Here, "near" specifically refers to a spatial area to be understood, which is specifically composed of points, and the minimum distance of each point from the rotor element is a maximum of 50 mm, advantageously a maximum of 30 mm, preferably not more than 20 mm, and particularly preferably not more than 10 mm.

[0020] If the support element comprises an outer ring which is realized in one piece with the fixing element, a particularly simple construction of the rotor arrangement can advantageously be achieved, as a result of which it is particularly possible to keep the production costs at a low level.

[0021] Furthermore, the invention proposes that the fixing element is embodied as a bearing seat. In this way, a particularly advantageous structure of the rotor assembly group can be achieved. It is further advantageous that the assembly of the rotor assembly group can be carried out outside the hollow body, allowing the prepared rotor assembly group to be fixed in the hollow body in a simple manner by means of the fixing element. This also facilitates a particularly precise installation of the rotor assembly group in the hollow body. The "bearing seat" is specifically configured to carry at least one support element, preferably to accommodate at least one support element in a rotationally fixed and / or translationally fixed manner.

[0022] In addition, the present invention proposes that the bearing seat includes a continuous recess in a direction parallel to the axial extension of the rotor element. This facilitates the non-destructive pressing of the rotor element into the support element, specifically into the central recess of the inner ring of the support element. Advantageously, the installation of the rotor assembly group becomes simple and safe. In the installed state of the rotor assembly group, the outer ring of the support element is already fixedly connected to the bearing seat, and the recess of the bearing seat is particularly conducive to supporting the inner ring of the support element when the rotor element is pressed into the support element. The so-called "continuous recess" of a component specifically refers to a recess that completely penetrates the component, such as a hole. Specifically, the diameter of the continuous recess of the bearing seat is smaller than the outer diameter of the outer ring of the support element, specifically at least 10% smaller. In this way, the outer ring of the support element axially supports the bearing seat. Specifically, the diameter of the continuous recess of the bearing seat is larger than the inner diameter of the inner ring of the support element, specifically at least 10% larger. This facilitates the introduction of a support device for supporting the inner ring of the support element during the pressing of the rotor element into the support element, thereby advantageously avoiding damage to the support element caused by the pressing force that occurs when pressing in by interference fit.

[0023] The present invention also proposes that at least one end region of the hollow body, specifically in the vicinity of the support element, the hollow body is implemented as a cap shape, specifically a spherical cap shape, and / or at least the end region of the hollow body is produced by deep drawing. Therefore, considering the pressure load occurring in the hollow body, the wall thickness of the hollow body can be kept very small, specifically due to the cap shape (specifically a spherical cap shape) having a very high pressure resistance. This advantageously improves the formability of the hollow body and / or simplifies the forming of the hollow body. Specifically, in this way, it can be advantageously promoted to fix the rotor assembly group in the hollow body by plastic deformation of the hollow body and fix it by caulking respectively. In addition, the thin wall of the hollow body that separates the stator and the rotor of the motor (specifically a stepper motor) advantageously allows a particularly favorable magnetic interaction between the stator and the rotor, thereby advantageously enabling the maximum achievable high torque of the rotor (specifically a rotor element) to be achieved. In this case, the so-called "nearby" refers specifically to a spatial area, which is composed of points, and in each case, the minimum distance from the supporting element is specifically a maximum of 50 mm, advantageously a maximum of 30 mm, preferably not more than 20 mm, and particularly preferably not more than 10 mm. Specifically, the hollow body is closed in the end area of ​​the hollow body, specifically a pressed closure. "Cap shape" specifically refers to a cupola shape, a spherical block shape and / or a dome shape. "Deep drawing" specifically refers to the drawing and pressing of metal (specifically a metal sheet). Specifically, the wall thickness of the hollow body is constant. Preferably, in the area of ​​the cap shape (specifically a spherical cap shape), the wall thickness of the hollow body is at least substantially the same as the wall thickness of the hollow body outside the cap shape (specifically a spherical cap shape). "Substantially the same" specifically refers to the same except for manufacturing tolerances. Specifically, a material (such as a metal sheet) that maintains a constant wall thickness during the drawing process. This advantageously can avoid the appearance of weak points in the hollow body.

[0024] In addition, the present invention also proposes a valve with a rotor device. The rotor device is used for electromagnetic control of the valve, specifically, to control the opening state and / or the opening degree of the valve. The valve is specifically implemented as a sliding valve, such as a piston valve or a ball valve, or preferably as a seat valve, such as a disc valve, a ball valve, or preferably as a needle valve. Specifically, the rotor element is configured to drive at least one spindle drive. Specifically, the spindle drive is arranged on the output side of the rotor element. Specifically, the spindle drive is configured to convert the rotational movement of the motor (specifically a stepper motor) into a translational movement of the (specifically rotationally supported) valve stop body, such as a valve needle. Therefore, a valve can be advantageously realized, which can receive, for example, at least partially the axial force of pulling (and pressing) caused by the spindle drive, while having a particularly small axial tolerance, specifically in the case of a change in the rotation direction of the rotor element, so that the valve can be adjusted and / or adjusted particularly accurately.

[0025] The invention further proposes that the valve comprises a stator, which is compressed and / or fluid-compressed and separated from a rotor assembly, the rotor assembly being flown through by fluid and at least partially realizing a rotor interacting with the stator. Thus, advantageously, the switching of the valve is realized in the closed flow-conducting hollow body, wherein the valve preferably has no electrical circuits arranged in the flow-conducting hollow body.

[0026] In addition, the present invention also proposes a method for converting a rotor device and / or assembling a valve, the method having at least one hollow body (specifically a pressure pipe of a valve), and having at least one rotor assembly group, the assembly group is fixed in the hollow body in a rotationally fixed and translationally fixed manner, the assembly group includes at least one rotor element, which is at least configured to convert a magnetic field change into a rotational movement of the rotor element, and further includes a support element, which is at least configured as a rotational support of the rotor element. And includes at least one fixing element, which is at least configured to fix the rotor assembly group in the hollow body (specifically in the pressure pipe), wherein in at least one assembly step, the rotor element and the fixing element are fixedly pressed (specifically by interference fit) with the support element on the outside of the hollow body (specifically in the pressure pipe), wherein the support element is specifically configured to transmit axial tension (preferably tension and pressure). In this way, simple assembly of the rotor assembly group, the rotor device and / or the valve becomes an advantageous condition. In particular, this advantageously promotes particularly precise positioning of the rotor assembly group in the hollow body. The term "outside the hollow body" specifically refers to outside the interior of the hollow body. Specifically, the pressing of the support element and the fixing element by interference fit results in a non-destructive inseparable connection of the support element and the fixing element. The so-called "fixed pressing" specifically refers to pressing by interference fit and / or pressing resulting in a non-destructive inseparable connection.

[0027] The invention further proposes that in at least one further assembly step, in particular temporarily performed after the assembly step, the rotor assembly group is installed and / or inserted into the hollow body with a transition fit, in particular with a slight interference fit or with a close tolerance fit. In this way, a damage-free installation of the rotor assembly group in the hollow body is advantageously achieved. In particular, the load on the support element can be kept small when performing the further assembly step, so that the full functionality of the support element can be advantageously maintained.

[0028] Furthermore, the invention proposes that in at least one additional further assembly step, the rotor assembly group is fixed in the hollow body at least by a forming process acting on at least a part of the hollow body, in particular by caulking and / or by crimping. In this way, a safe and stable fixation of the rotor assembly group in the hollow body, in particular a rotational fixation and a translational fixation, is advantageous, which does not lead to damage to the supporting elements. Advantageously, the installation of the rotor assembly group in the hollow body is possible at least substantially without axial forces caused by the installation having a negative impact on the supporting elements. In particular, the forming process comprises a plastic deformation (in particular a bending) of a part of the hollow body, preferably a wall of the hollow body. In particular, the hollow body is plastically deformed in such a way that the wall of the hollow body at least partially engages with the deepening of the fixing element.

[0029] Furthermore, the invention proposes to fix the rotor assembly group in the hollow body at least by welding, in particular laser welding. This advantageously achieves a safe and stable (in particular rotational and translational) fixation of the rotor assembly group in the hollow body, which does not lead to damage to the support elements. Advantageously, a convenient installation of the rotor assembly group in the hollow body can be obtained, at least substantially without axial forces caused by the installation having a negative impact on the support elements. In particular, during welding, the hollow body is at least partially integrated with the fixing element and / or the support element.

[0030] As a supplement, the invention proposes to fix the rotor assembly in the hollow body at least by means of glue. In this way, a safe and stable fixation (in particular rotational fixation and translational fixation) of the rotor assembly in the hollow body is possible, which does not lead to damage to the support elements. Advantageously, the installation of the rotor assembly in the hollow body is advantageous, which is at least substantially free of axial forces caused by the installation and which have a negative impact on the support elements. In particular, by gluing, an adhesive is introduced between the inner wall of the hollow body and the outer wall of the fixing element and / or the support element.

[0031] Furthermore, the invention proposes that during the installation, insertion and / or fixing of the fixing element in the hollow body, the axial force acting on the support element in a direction parallel to the axis of rotation of the rotor element is less than the maximum axial force expected in normal operation of the rotor device and / or the valve, in particular less than 25 times (in Newtons), preferably less than 20 times, advantageously less than 15 times, preferentially less than 10 times, in particular preferentially less than 5 times the maximum diameter of the rotor assembly group (in millimeters), preferably less than 150 N, preferentially less than 250 N. This advantageously allows the rotor assembly group to be fixed in the hollow body without causing damage to the support element.

[0032] The rotor device according to the invention, the valve according to the invention and the method according to the invention are not limited to the above-described applications and implementations. Specifically, in order to achieve the functions described here, the rotor device according to the invention, the valve according to the invention and the method according to the invention may include individual elements, components and units different from the number given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Further advantages can be seen from the following description of the drawings. In the drawings, three exemplary embodiments of the invention are shown. The drawings, the description and the claims contain features in a number of combinations. A person skilled in the art will also purposefully consider these features individually and will find further advantageous combinations.

[0034] As shown in the figure:

[0035] Figure 1 Schematic cross-sectional view of a valve with a rotor assembly,

[0036] Figure 2 A flow chart of a method for a rotor device assembly,

[0037] Figure 3 is a schematic cross-sectional view of an alternative rotor arrangement having an alternative support element, and

[0038] Figure 4 is a schematic cross-sectional view of another alternative rotor arrangement having another alternative support element. DETAILED DESCRIPTION

[0039] Figure 1 Shown is a valve 14a. The valve 14a is implemented as a solenoid-controlled valve. The valve 14a includes a valve blocking body 66a. The valve blocking body 66a is configured to at least partially or completely close and / or release the fluid pipeline 68a of the pressure pipe 12a of the valve 14a. The valve blocking body 66a is translatable. The valve blocking body 66a can translate toward the valve seat 70a of the valve 14a and / or can translate away from the valve seat 70a of the valve 14a. If the valve blocking body 66a is located in the valve seat 70a, the fluid pipeline 68a is completely closed. If the valve blocking body 66a is located outside the valve seat 70a, the fluid pipeline 68a is at least partially opened. The valve 14a includes a rotor device 52a. The rotor device 52a is configured to control the valve 14a. The rotor device 52a includes a spindle drive device 72a. The spindle drive device 72a is configured to translate the valve blocking body 66a. The valve blocking body 66 a is rotatably supported by a supporting element which is not shown in detail.

[0040] The valve 14a includes an electromagnetic stepper motor 74a. The electromagnetic stepper motor 74a includes a stator 54a. The stator 54a includes at least a coil winding 76a. Preferably, the stator 54a includes a plurality of coil windings 76a. The coil windings 76a are configured to generate a magnetic field. The coil windings 76a constitute the stator windings of the stator 54a. The electromagnetic stepper motor 74a includes a rotor 56a. The rotor 56a is configured to interact with the stator 54a. The rotor 56a is configured to interact with the magnetic field generated by the coil windings 76a. The modulation of the magnetic field of the stator 54a is configured to generate the rotation of the rotor 56a. The stator 54a is implemented as a laminated stator. The stator 54a includes at least one magnetic core 108a. For each coil winding 76a, there is an assigned magnetic core 108a. The magnetic core 108 is implemented by laminated steel. The valve 14a includes a housing 84a. The housing 84a is configured at least to house and / or protect at least a portion of the valve 14a and / or the rotor assembly 52a.

[0041] The stator 54a is separated from the rotor 56a in a pressure-tight and / or fluid-tight manner. The rotor device 52a includes a hollow body 10a. The hollow body 10a is implemented as a pressure tube 12a. The hollow body 10a realizes a pressure-tight and / or fluid-tight separation of the stator 54a and the rotor 56a. The hollow body 10a has an interior 78a. The hollow body 10a (specifically, the interior 78a of the hollow body 10a) can be flowed through by a fluid. The components in the hollow body 10a are flowed through by the fluid. The components outside the hollow body 10a are not in contact with the fluid. The fluid in the interior 78a of the hollow body 10a is subjected to pressure. The hollow body 10a is delimited by a wall 80a. The pressure applied by the fluid inside the hollow body 10a to the wall 80a of the hollow body 10a exceeds 1 bar. The hollow body 10a (specifically, the wall 80a of the hollow body 10a) is made of metal. Alternatively, the hollow body 10a can also be made of synthetic material. The wall 80a of the hollow body 10a has a constant wall thickness. The rotor 56a is arranged in the rotor space 112a. The rotor space 112a is formed by the interior 78a of the hollow body 10a. The stator 54a is arranged in the stator space 114a. The stator space 114a is arranged outside the interior 78a of the hollow body 10a. The stator space 114a and the rotor space 112a are separated from each other in a pressure-tight and / or fluid-tight manner.

[0042] The hollow body 10a comprises at least one end region 48a. In the assembled state of the rotor device 52a, the end region 48a of the hollow body 10a is arranged in the vicinity of the support element 20a of the rotor device 52a. In the end region 48a, the hollow body 10a is implemented as a calotte-shaped. In the end region 48a, the hollow body 10a is implemented as a spherical-calotte-shaped. The end region 48a of the hollow body 10a has a calotte shape 82a. The end region 48a of the hollow body 10a is produced by deep drawing. The calotte shape 82a of the hollow body 10a is produced by deep drawing. Due to the calotte shape 82a, the end region 48a of the hollow body 10a has a particularly high pressure resistance.

[0043] The rotor device 52a comprises a rotor assembly group 16a. The rotor assembly group 16a is arranged in the hollow body 10a. In the region of the rotor assembly group 16a, the hollow body 10a has an at least substantially constant diameter and / or an at least substantially constant cross-sectional geometry. The rotor assembly group 16a is fixed to the hollow body 10a in a manner that is at least partially rotationally fixed and translationally fixed. The rotor assembly group 16a can be surrounded by a fluid flow. The rotor assembly group 16a at least partially forms a rotor 56a. The rotor assembly group 16a has a rotation axis 64a. At least a portion of the rotor assembly group 16a is configured to rotate around the rotation axis 64a.

[0044] The rotor assembly group 16a includes an output portion 38a. The output portion 38a is operatively connected to the spindle drive 72a. The output portion 38a is at least partially implemented integrally with the spindle drive 72a. The output portion 38a is arranged on the output side 32a of the rotor assembly group 16a.

[0045] The rotor assembly group 16a includes a rotor element 18a. The rotor element 18a is configured to convert at least the magnetic field change generated by the stator 54a into the rotational motion of the rotor element 18a. The rotor element 18a includes a rotor shaft 86a. The rotor shaft 86a is configured to rotate around the rotation axis 64a. The rotation axis 64a passes through the rotor shaft 86a centrally in the longitudinal direction. The rotor shaft 86a is implemented to be rotationally symmetrical around the rotation axis 64a. The rotor element 18a includes at least one permanent magnet 88a. The permanent magnet 88a at least partially forms the armature of the electromagnetic stepper motor 74a. The permanent magnet 88a is configured to interact with the magnetic field of the stator 54a. The permanent magnet 88a is implemented integrally with the rotor shaft 86a. The permanent magnet 88a is glued to the rotor shaft 86a. A plurality of permanent magnets 88a are glued to the rotor shaft 86a in the circumferential direction of the rotor shaft 86a. The rotor element 18a can be flowed through and / or flowed to the surrounding by the fluid. During the rotation about the axis of rotation 64a, the rotor element 18a describes a rotation plane in the hollow body 10a. The radial distance 24a between the rotation plane described by the rotor element 18a when rotating at least 360° and the hollow body 10a is at most 4.5% of the maximum diameter 26a of the rotation plane and / or at most 0.3 mm. In order to optimize the magnetic coupling of the rotor 56a and the stator 54a, the distance between the rotor 56a and the stator 54a is kept as small as possible by the size of the rotor element 18a and the thinnest possible wall 80a. The hollow body 10a includes a reference mark 110a. The reference mark 110a is implemented in a curved manner of the wall 80a of the hollow body 10a. In addition, the reference mark 110a can also be implemented as a color mark or an engraved mark. The reference mark 110a is configured to adjust the position of the rotor assembly group 16a in the hollow body 10a.

[0046] The rotor assembly group 16a includes a support element 20a. The support element 20a is configured as a rotational support for the rotor element 18a. The support element 20a is configured to rotationally support the rotor shaft 86a of the rotor element 18a. The support element 20a can be surrounded by a fluid and / or flowed through by the fluid. The support element 20a is arranged in the hollow body 10a so that at least an axial force pulling the rotor element 18a can be transmitted through the support element 20a. The support element 20a is arranged in the hollow body 10a in such a way that it is configured to transmit axial tension and axial pressure to the support element 20a in at least two opposite directions. The support element 20a is embodied as a ball bearing. The support element 20a includes an outer ring 34a. The support element 20a includes an inner ring 36a. Between the outer ring 34a and the inner ring 36a, the support element 20a includes a plurality of balls 90a. The outer ring 34a is configured at least to release the axial forces received by the inner ring 36a to the fixed element 22a and / or the hollow body 10a of the rotor assembly 16a.

[0047] The support element 20a is arranged on the side 40a of the rotor element 18a, which faces away from the output portion 38a of the rotor assembly group 16a. The rotor assembly group 16a has no other support element capable of transmitting axial force at least on the output side 32a of the rotor assembly group 16a. The rotor assembly group 16a has no other support element capable of transmitting axial force at least near the rotor element 18a. The support element 20a and the rotor element 18a are non-destructively and inseparably connected to each other. The rotor element 18a includes a connector 92a. The connector 92a is implemented to be rotationally symmetrical around the rotation axis 64a of the rotor shaft 86a. The connector 92a is arranged on the side 40a of the rotor element 18a (specifically the side of the rotor shaft 86a), which faces away from the output portion 38a. The connector 92a is configured to be pressed into the recess 94a of the inner ring 36a by an interference fit. The connector 92a is pressed into the recess 94a of the inner ring 36a. The rotor shaft 86a comprises an abutment edge 96a. The connector 92a is pressed into the recess 94a of the inner ring 36a so that the abutment edge 96a of the rotor shaft 86a directly contacts the inner ring 36a.

[0048] The rotor assembly group 16a includes a fixing element 22a. The fixing element 22a is configured at least to fix the rotor assembly group 16a in the hollow body 10a. The fixing element 22a is configured to rotationally fix and translationally fix the rotor assembly group 16a in the interior 78a of the hollow body 10a. The fixing element 22a is inserted into the hollow body 10a by a transition fit. The fixing element 22a is fixed in the hollow body 10a by caulking the wall 80a of the hollow body 10a. The fixing element 22a includes at least one deepening 30a in the radial direction of the outer surface 28a of the fixing element 22a. The deepening 30a of the fixing element 22a is configured to rotationally fix and translationally fix the rotor assembly group 16a in the hollow body 10a by engaging at least a portion of the wall 80a of the hollow body 10a into the deepening 30a of the fixing element 22a. The wall 80a of the hollow body 10a engages in a form-fitting manner with the deepening 30a of the fixing element 22a. The hollow body 10a and the fixing element 22a are connected to each other in a rotationally fixed and translationally fixed manner by a form-fitting connection. The rotor assembly group 16a is fixed in the hollow body 10a in the vicinity of the end region 48a of the hollow body 10a, in particular by a form-fitting connection between the wall 80a and the deepening 30a. The so-called "nearby" here refers specifically to a spatial region in which the rotor assembly group 16a is connected to the hollow body 10a in a fixed manner, and this spatial region is specifically composed of points whose minimum distance to the end region 48a of the hollow body 10a in each case is a maximum of 50 mm, advantageously a maximum of 30 mm, preferably not more than 20 mm, particularly preferably not more than 10 mm. Figure 1The deepening 30a in the fixing element 22a shown in the figure is implemented as a groove. The groove surrounds at least most of the circumference of the fixing element 22a in the circumferential direction, preferably surrounds the entire circumference of the fixing element 22a. In addition, the deepening 30a can be segmented interrupted, or can be implemented as a plurality of point-shaped deepenings, etc.

[0049] The support element 20a and the fixed element 22a are inseparably connected to each other in a non-destructive manner. The fixed element 22a includes a bearing seat 98a. The support element 20a is arranged in the bearing seat 98a. The support element 20a is pressed into the bearing seat 98a by an interference fit. The outer ring 34a of the support element 20a is pressed into the bearing seat 98a by an interference fit. The fixed element 22a has a shoulder 100a. The shoulder 100a is configured to form a support with the outer ring 34a of the support element 20a inserted into the fixed element 22a. The support element 20a is pressed into the bearing seat 98a of the fixed element 22a, so that the shoulder 100a of the fixed element 22a is connected to the outer ring 34a. The fixed element 22a is implemented as a bearing seat 42a. The bearing seat 42a includes a continuous recess 46a in a direction extending parallel to the axial direction 44a of the rotor element 18a. In the assembled state of the rotor device 52a, the axial direction 44a of the rotor element 18a extends at least substantially parallel to the rotation axis 64a of the rotor element 18a. The continuous recess 46a of the fixing element 22a is implemented substantially in a cylindrical shape. Alternatively, the continuous recess 46a of the fixing element 22a can be implemented in a polyhedral shape, for example in a cubic shape. The diameter of the continuous recess 46a of the fixing element 22a is smaller than the diameter of the outer ring 34a and larger than the diameter of the inner ring 36a. The continuous recess 46a of the fixing element 22a is configured to allow the rotor element 18a to be pressed into the support element 20a, which is non-destructive to the support element 20a, specifically in the assembled state of the rotor assembly group 16a, in which the fixing element 22a is already pressed with the support element 20a. The continuous recess 46a of the fixing element 22a allows access to the inner ring 36a of the support element 20a on one side of the fixing element.

[0050] Figure 2A flow chart of a method for assembling a rotor device 52a is shown. In at least one assembly step 58a, the rotor element 18a and the fixing element 22a are fixedly pressed onto the outside of the hollow body 10a by means of the support element 20a. In a first sub-step 116a of the assembly step 58a, the outer ring 34a of the support element 20a is first pressed into the bearing seat 98a of the fixing element 22a. The outer ring 34a of the support element 20a is pressed into the bearing seat 98a by an interference fit in the first sub-step 116a. In order to avoid damage to the support element 20a, in the first sub-step 116a, when the support element 20a is pressed into the fixing element 22a, the outer ring 34a of the support element 20a is supported in a direction opposite to the pressing direction of the support element 20a. In a second sub-step 118a of the assembly step 58a, the rotor element 18a is pressed into the support element 20a. The connection head 92a of the rotor element 18a is pressed into the recess 94a of the inner ring 36a of the support element 20a by interference fit in the second substep 118a. In order to avoid damage to the support element 20a, in the second substep 118a, when the connection head 92a of the rotor element 18a is pressed into the recess 94a of the inner ring 36a of the support element 20a, the inner ring 36a of the support element 20a is supported in the direction opposite to the pressing direction of the rotor element 18a.

[0051] In at least one further assembly step 60a, the rotor assembly group 16a is installed and / or inserted into the hollow body 10a by a transition fit. In the further assembly step 60a, when the fixing element 22a is installed and / or inserted into the hollow body 10a, the maximum axial force acting on the support element 20a in a direction parallel to the axis of rotation 64a of the rotor element 18a is less than the maximum axial force expected in normal operation of the rotor device 52a and / or the valve 14a. In at least one additional further assembly step 62a, the rotor assembly group 16a is fixed in the hollow body 10a at least by a forming process acting on at least a part of the hollow body 10a. The forming process includes bending and / or caulking the wall 80a of the hollow body 10a. During the forming process, the wall 80a of the hollow body 10a forms a form-fitting connection with the fixing element 22a. During the forming process, the wall 80a of the hollow body 10a is pressed into the deepening 30a of the fixing element 22a.

[0052] Alternatively or additionally, in an alternative additional further assembly step 62a', the rotor assembly group 16a is fixed by welding. The welding comprises laser welding. Alternatively or additionally, the rotor assembly group 16a is fixed in the hollow body 10a at least by glue in a second alternative additional further assembly step 62a". In at least one further assembly step 50a, the hollow body 10a with the rotor assembly group 16a in its interior 78a is closed in a pressure-tight and / or fluid-tight manner.

[0053] exist Figure 3 and Figure 4 In the following, two further exemplary embodiments of the invention are shown. The following description and drawings are essentially limited to the differences between the exemplary embodiments, wherein with regard to components with the same names, in particular components with the same reference numerals, reference may be made primarily to the drawings and / or the description of other exemplary embodiments, in particular Figure 1 and 2 In order to distinguish the exemplary embodiments, Figure 1 and Figure 2 The letter a is added to the reference numerals. Figure 3 and Figure 4 In the exemplary embodiment of , the letter a has been replaced by the letters b and c.

[0054] Figure 3 An alternative rotor arrangement 52b is shown, comprising a rotor assembly set 16b, which is fixed in the interior 78b of the hollow body 10b, with an alternative support element 20b. The support element 20b is embodied as a two-row tapered roller bearing.

[0055] Figure 4 Another alternative rotor device 52c is shown, which includes a rotor assembly group 16c, which is fixed in the interior 78c of the hollow body 10c, and has another alternative support element 20c. The support element 20c is embodied as a rotary sliding bearing. The support element 20c includes a fixing ring 120c. The fixing ring 120c is configured to axially fix the support element 20c in the rotor assembly group 16c.

[0056] The rotor assembly group 16c includes a fixing element 22c. The fixing element 22c is at least configured to fix the rotor assembly group 16c in the hollow body 10c. The fixing element 22c is configured to fix the rotor assembly group 16c in rotation and translation in the interior 78c of the hollow body 10c. The support element 20c includes an inner ring 36c and an outer ring 34c. The outer ring 34c is implemented integrally with the fixing element 22c. The rotor assembly group 16c is implemented so as to get rid of the bearing seat that is realized separately from the support element 20c.

[0057] Reference numerals

[0058] 10 Hollow body

[0059] 12 Pressure pipe

[0060] 14 Valves

[0061] 16 rotor assembly set

[0062] 18 rotor elements

[0063] 20 Support elements

[0064] 22Fixing elements

[0065] 24Distance

[0066] 26 diameter

[0067] 28 Surface

[0068] 30 Deepening

[0069] 32 Output side

[0070] 34 Outer Ring

[0071] 36 Inner Ring

[0072] 38 Output unit

[0073] 40 side

[0074] 42 bearing seat

[0075] 44 Axial direction

[0076] 46 recess

[0077] 48 End area

[0078] 50 assembly steps

[0079] 52 rotor device

[0080] 54 stator

[0081] 56 rotor

[0082] 58Assembly steps

[0083] 60 Further assembly steps

[0084] 62 Additional further assembly steps

[0085] 64 Rotation axis

[0086] 66 valve blocking body

[0087] 68 Fluid Pipeline

[0088] 70 valve seat

[0089] 72 Spindle drive device

[0090] 74 electromagnetic stepper motor

[0091] 76 Coil winding

[0092] 78 Interior

[0093] 80 wall

[0094] 82 cap shape

[0095] 84 Shell

[0096] 86 rotor shaft

[0097] 88 permanent magnet

[0098] 90 Ball

[0099] 92 connector

[0100] 94 recess

[0101] 96 abutting edge

[0102] 98 bearing seat

[0103] 100 Shoulders

[0104] 108 Magnetic core

[0105] 110 Reference mark

[0106] 112 Rotor Space

[0107] 114 Stator space

[0108] 116 First Substep

[0109] 118 Second Substep

[0110] 120 Fixing ring

Claims

1. A rotor device (52a-c) having at least one hollow body (10a-c) and at least one rotor assembly group (16a-c) fixed in the hollow body (10a-c), the rotor device (52a-c) comprising: - at least one rotor element (18a-c) configured at least to convert magnetic field variations into a rotational movement of said rotor element (18a-c), - a support element (20a-c) configured at least as a rotational support for said rotor element (18a-c), and - at least one fixing element (22a-c) configured at least to fix the rotor assembly group (16a-c) in the hollow body (10a-c), wherein the support element (20a-c) is arranged in the hollow body (10a-c) in such a way that at least an axial force pulling toward the rotor element (18a-c) and / or an axial force pulling and pressing the support element (20a-c) in at least two opposite directions can be transmitted through the support element (20a-c); the support element (20a-c) and the rotor element (18a-c) are non-destructively and inseparably connected to each other, and / or the support element (20a-c) and the fixing element (22a-c) are non-destructively and inseparably connected to each other; The support element (20a-c) is arranged on a side (40a-c) of the rotor element (18a-c), the side (40a-c) facing away from the output portion (38a-c) of the rotor assembly group (16a-c); The rotor assembly group (16a-c) has no additional supporting elements capable of transmitting axial forces, at least on the output side (32a-c) of the rotor assembly group (16a-c).

2. The rotor device (52a-c) according to claim 1, characterized in that The radial distance (24a-c) from the surface of rotation described by the rotor element (18a-c) in a 360 degree rotation to the hollow body (10a-c) is at most 4.5% of the maximum diameter of the surface of rotation or the radial distance (24a-c) is at most 0.3 mm.

3. The rotor device (52a-c) according to claim 1, characterized in that On at least one surface (28a-c), located radially on the outside, the fixing element (22a-c) has at least one deepening (30a-c), which is configured to enable the rotor assembly group (16a-c) to be fixed in the hollow body (10a-c) by engaging at least a part of the hollow body (10a-c) into the deepening (30a-c).

4. The rotor device (52a-c) according to claim 3, characterized in that The deepening (30a-c) in the fixing element (22a-c) forms a groove.

5. The rotor device (52a-c) according to claim 1, characterized in that The fixing elements (22a-c) are introduced into the hollow bodies (10a-c) by means of a transition fit.

6. The rotor device (52a-c) according to claim 1, characterized in that The support elements (20a-c) are embodied as double-row tapered roller bearings or rotary plain bearings.

7. The rotor device (52a-c) according to claim 1, characterized in that The support element (20a-c) comprises an outer ring (34a-c) and an inner ring (36a-c), wherein the inner ring (36a-c) is at least configured to receive an axial force from the rotor element (18a-c), and the outer ring (34a-c) is at least configured to transmit the axial force received by the inner ring (36a-c) to the fixing element (22a-c) and / or to the hollow body (10a-c).

8. The rotor device (52c) according to claim 1, characterized in that The support element (20c) comprises an outer ring (34c) which is embodied in one piece with the fixing element (22c).

9. The rotor device (52a; 52b) according to claim 1, characterized in that The fixing element (22a; 22b) is embodied as a bearing seat (42a; 42b).

10. The rotor device (52a-c) according to claim 9, characterized in that The bearing seat (42a-c) includes a continuous recess (46a-c) in a direction extending parallel to the axial direction (44a-c) of the rotor element (18a-c).

11. The rotor device (52a-c) according to claim 1, characterized in that In at least one end region (48a-c) of the hollow body (10a-c), the hollow body (10a-c) is embodied in a cap shape and / or at least the end region (48a-c) of the hollow body (10a-c) is produced by deep drawing.

12. The rotor device (52a-c) according to claim 1, characterized in that The hollow body (10a-c) is a pressure tube (12a-c) of a valve (14a-c).

13. A valve (14a-c) having a rotor arrangement (52a-c) as claimed in claim 1.

14. The valve (14a-c) according to claim 13, characterized in that A stator (54a-c) is pressure-tightly and / or fluid-tightly separated from the rotor assembly group (16a-c), the rotor assembly group (16a-c) being surrounded by a fluid flow and at least partially realizing a rotor (56a-c) interacting with the stator (54a-c).

15. A method for assembling a rotor device (52a-c), the rotor device (52a-c) according to any one of claims 1 to 12, the rotor device (52a-c) having at least one hollow body (10a-c) and at least one rotor assembly group (16a-c) fixed in the hollow body (10a-c), comprising: - at least one rotor element (18a-c) configured at least to convert magnetic field variations into a rotational movement of said rotor element (18a-c), - a support element (20a-c) configured at least as a rotational support for said rotor element (18a-c), and - at least one fixing element (22a-c) configured at least to fix the rotor assembly group (16a-c) in the hollow body (10a-c), It is characterized in that In at least one assembly step (58a-c), the rotor element (18a-c) and the fixing element (22a-c) are fixedly pressed against the outside of the hollow body (10a-c) by means of the support element (20a-c).

16. The method according to claim 15, characterized in that In at least one further assembly step (60a-c), the rotor assembly set (16a-c) is mounted and / or inserted into the hollow body (10a-c) with a transition fit.

17. The method according to claim 15, characterized in that In at least one additional further assembly step (62a-c), the rotor assembly group (16a-c) is fixed in the hollow body (10a-c) at least by a forming process acting on at least a part of the hollow body (10a-c).

18. The method according to claim 16, characterized in that The rotor assembly set (16a-c) is fixed in the hollow body (10a-c) at least by welding.

19. The method according to claim 16, characterized in that The rotor assembly set (16a-c) is fixed in the hollow body (10a-c) at least by glue.

20. The method of claim 16, wherein: During installation, insertion and / or fixing of the fixing element (22a-c) in the hollow body (10a-c), the axial force acting on the support element (20a-c) in a direction parallel to the rotation axis (64a-c) of the rotor element (18a-c) is smaller than the maximum axial force expected during normal operation of the rotor device (52a-c) and / or the valve (14a-c).

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