Rotor and fluid pump for heart support
By designing the semi-open rotor geometry, the problems of complex rotor manufacturing and difficult to achieve parameter specifications in the prior art are solved, and a simpler manufacturing process and better fluid pump operation performance are achieved.
Patent Information
- Application Number
- CN202380056130.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-07-29
- Filing Date
- 2023-07-27
- Publication Date
- 2025-03-11
AI Technical Summary
The existing rotary fluid pump rotors for cardiac support are complex in manufacturing, difficult to maintain manufacturing tolerances, and difficult to achieve certain parameter specifications such as dp-Q characteristic curves and axial force characteristic curves.
A semi-open rotor geometry is designed, including rotor magnet assembly and blades on the substrate, with the blade gap forming a fluid channel, and a flow opening is provided at the outlet opening of the fluid channel to simplify manufacturing and adjust operating parameters.
By simplifying the manufacturing process, it is possible to maintain predetermined manufacturing tolerances more easily, and to improve the steepness of the dp-Q characteristic curve and the monotonicity of the axial force characteristic curve in certain areas, improving the operating performance of the fluid pump.
Smart Images
Figure CN119604328A_ABST
Abstract
Description
[0001] The present application relates to a rotor for a fluid pump for cardiac support and a corresponding fluid pump. The subject matter of the present application can be used in particular in the field of short-term or long-term cardiac support by means of implantable fluid pumps, in particular VAD (VAD stands for ventricular assist device).
[0002] From the prior art, various rotary fluid pumps for cardiac support are known, in particular rotary fluid pumps which can be used as implantable VADs which are fluidically connected to an existing heart.
[0003] The rotors of such fluid pumps often have complex geometries, which require correspondingly complex manufacturing processes. For example, rotor geometries with cavities inside the rotor may require multi-piece manufacturing, i.e. manufacturing from a plurality of individual components and assembling the individual components together and / or require subsequent surface treatment to ensure adequate surface quality. For example, for rotors formed by welding multiple pieces, post-processing of the welds may be required, which may be difficult due to, for example, limited accessibility to any cavities. Furthermore, the above aspects may also make it difficult to maintain manufacturing tolerances.
[0004] For the rotor of the fluid pump, it is also desirable to maintain certain parameter specifications, such as certain characteristic curves about the rotor and / or the fluid pump. For example, it may be desirable that the dp-Q characteristic curve is within a predetermined range, and / or has a steepness greater than or equal to a predetermined minimum steepness at least in certain areas. The dp-Q characteristic curve describes the pressure difference (dp) on the fluid pump or the part of the fluid pump including the rotor as a function of the volume flow (Q) flowing through the fluid pump. By a suitable dp-Q characteristic curve, for example, a volume flow that is too low or negative (i.e., opposite to the pumping direction) can be avoided or reduced. In addition, for example, by a suitable dp-Q characteristic curve, the volume flow can be reliably estimated using the pressure difference measured or determined from the measurement data, which is advantageous for controlling or regulating the fluid pump, such as using the zero force control of the type described below. In addition, for example, it may be desirable that the axial force characteristic curve is within a predetermined range, and / or is monotonic at least in certain areas, preferably strictly monotonic and / or as steep as possible. The axial force characteristic curve describes the axial force acting on the rotor along the axis of rotation as a function of the volume flow flowing through the fluid pump. For example, by means of a suitable axial force characteristic curve, the axial force and / or the axial position measured or determined from the measurement data can be used to reliably estimate the volume flow, which in turn is advantageous for controlling or regulating the fluid pump, for example using zero-force control.
[0005] In view of the prior art, the object of the present application is to provide a rotor for a fluid pump for cardiac support and a corresponding fluid pump, which have at least some of the above-mentioned desired characteristics.
[0006] This problem is solved by proposing a rotor according to claim 1 and a fluid pump for cardiac support according to claim 17. Further developments and preferred embodiments result from the features of the respective dependent claims.
[0007] The proposed rotor of a fluid pump for cardiac support includes: a rotor magnet assembly for non-contact support of the rotor in a cavity of the fluid pump so that the rotor can rotate around a rotation axis to transport fluid from the inlet of the cavity to the outlet of the cavity, and a first end of the rotor is closer to the inlet than a second end of the rotor opposite to the first end along the rotation axis; a hub structure arranged at the first end and centered on the rotation axis, which includes one or more magnets of the rotor magnet assembly; a substrate arranged at the second end or between the hub structure and the second end, which has blades for transporting fluid, wherein gaps between the blades form fluid channels, which lead to corresponding outlet openings and are defined by the substrate toward the second end.
[0008] A fluid pump (also simply called a pump) is a rotary fluid pump, which can be in particular a centrifugal pump or also an axial flow pump or a mixed form (i.e., for example, a pump in which the conveyed fluid flows out of the cavity outlet with axial and radial flow components during operation). The rotor and the pump are in particular configured to convey blood as the fluid, for which purpose the inlet and outlet of the cavity can be connected or connected to the heart and / or a blood vessel connected to the heart.
[0009] The rotor is preferably supported in the cavity in an all-round, contactless manner by magnetic forces; in addition to magnetic forces, other types of forces, such as fluid dynamic forces, may also contribute to the support of the rotor in the cavity.
[0010] The rotor magnet assembly is arranged to magnetically interact with a stator magnet bearing assembly of the fluid pump to support the rotor in the cavity. In particular, the rotor magnet assembly and the stator magnet bearing assembly can form an active magnet bearing along at least a first direction, i.e., wherein the magnetic field is varied by controlling an electromagnet along the first direction to apply a variable supporting force to the rotor. Alternatively, the rotor magnet assembly and the stator magnet bearing assembly can form a passive magnet bearing along the first direction. The rotor magnet assembly and the stator magnet bearing assembly can be arranged to passively magnetically or also actively magnetically support the rotor along other spatial directions.
[0011] The rotor is arranged to form an electric motor together with a stator of a fluid pump, so that the rotor can rotate about an axis of rotation to convey a fluid. In particular, the permanent magnets of the rotor magnet assembly can form an electric motor, such as a brushless DC motor, together with the coils of the stator magnet bearing assembly and / or the coils of the stator motor assembly. The stator and the rotor can in particular form an axial flow motor; alternatively, the stator and the rotor can, for example, form a radial flow motor.
[0012] A particularly stable magnetic bearing support of the rotor in the cavity can be achieved by means of a hub structure arranged at the first end, wherein the magnets of one or more rotor magnet assemblies comprised by the hub structure can in particular stabilize a tilting of the rotor relative to the axis of rotation.
[0013] The actual rotation axis may, in particular during operation, shift and / or tilt depending on the movement of the rotor. However, in the following, when describing the arrangement and orientation of elements relative to the rotation axis, it is assumed that the rotation axis is fixed and corresponds to the stationary housing longitudinal axis of the pump.
[0014] The hub structure may protrude from the base plate in the direction of the first end. The length of the hub structure protruding from the base plate along the rotation axis may, for example, be at least a quarter, at least a third or at least a half of the total length of the rotor along the rotation axis; in particular, the length of the hub structure protruding from the base plate along the rotation axis may be between 40% and 45% or between 35% and 40% of the total length of the rotor along the rotation axis. The outer width of the hub structure perpendicular to the rotation axis may, for example, be at least a third or at least a half, in particular about 50%, of the total width of the rotor perpendicular to the rotation axis. The hub structure is preferably substantially rotationally symmetrical with respect to the rotation axis. In particular, the hub structure may be at least partially substantially cylindrical and / or at least partially substantially conical; the hub structure may have a cross section that varies along the rotation axis.
[0015] The hub structure may include one or more cavities for accommodating magnets of one or more rotor magnet assemblies included in the hub structure. One or more of the magnets of the one or more rotor magnet assemblies included in the hub structure may be configured to cooperate with the control coils of the stator magnet bearing assembly to apply force to the rotor, in particular force along the axis of rotation. One or more of the magnets of the one or more rotor magnet assemblies included in the hub structure may be configured to cooperate with the motor coils of the stator magnet bearing assembly and / or the stator motor assembly to apply torque to the rotor relative to the axis of rotation and / or apply force to the rotor, in particular force along the axis of rotation.
[0016] The substrate may be substantially disk-shaped, for example, the substrate may be substantially in the shape of a flat cylinder. The substrate may form or include a region completely enclosed around the axis of rotation. In particular, the substrate or the region completely enclosed around the axis of rotation may be substantially in the shape of a cylinder or a cylindrical ring.
[0017] The substrate may include one or more other magnets of the rotor magnet assembly. The substrate may include one or more cavities for accommodating magnets of the one or more rotor magnet assemblies included in the substrate. One or more of the magnets of the one or more rotor magnet assemblies included in the substrate may be configured to cooperate with the control coils of the stator magnet assembly, in particular the stator magnet bearing assembly, to apply force to the rotor, in particular along the axis of rotation, in particular for contactless bearing support of the rotor in the cavity. One or more of the magnets of the one or more rotor magnet assemblies included in the substrate may be configured to cooperate with the motor coils of the stator magnet bearing assembly to apply torque to the rotor relative to the axis of rotation and / or apply force to the rotor, in particular along the axis of rotation.
[0018] The blades preferably comprise a plurality of vanes, wherein the fluid channel is formed between mutually opposite sides of adjacent vanes. The vanes may extend substantially radially from a central region of the base plate to an outer region of the base plate, wherein the vanes are preferably angled and / or helically curved relative to a radial direction. The vanes may be arranged to act on the conveyed fluid with a radial flow component (direction towards the outlet opening) during operation. The vanes may be angled and / or curved relative to the axis of rotation.
[0019] It is envisaged that at least one of the fluid channels has a flow opening connecting the fluid channel to the cavity, the flow opening extending at least partially along a first side of the fluid channel towards the first end between the outlet opening and the hub structure.
[0020] The geometry of the fluid channels thus given, which are at least partially open toward the first end (in the region of the flow opening) and closed toward the second end (bounded by the base plate), is also referred to herein as a semi-open rotor geometry, and the corresponding rotor is referred to herein as a semi-open rotor. The geometry of the fluid channels which are also closed toward the first end (for example bounded by a cover plate opposite the base plate) is also referred to herein as a closed rotor geometry, and the corresponding rotor is referred to herein as a closed rotor.
[0021] By providing such a flow opening, the manufacture of the rotor can be simplified and / or predetermined manufacturing tolerances can be maintained more easily. In particular, in this way, a one-piece manufacture of a rotor assembly can be achieved, which would require multi-piece manufacture without corresponding flow openings. In particular, splits or seams in the blade region can be avoided. By means of a rotor geometry that is open toward the first end in the region of the flow opening, for example, the base plate or at least a portion of the base plate can be milled or cast in one piece together with the blade or a portion of the blade. In addition, such a rotor geometry that is open toward the first end can create channels for post-processing (e.g. polishing or grinding) the surface of the rotor, in particular in the region of the fluid channel.
[0022] Providing flow openings also provides a parameter space for the design of the rotor or the fluid pump within which certain parameter specifications can be achieved and / or operating parameters of the fluid pump can be adjusted and / or optimized relative to other rotor geometries. For example, it has been shown that the steepness of the dp-Q characteristic curve of a rotor with flow openings (i.e. a rotor geometry that is open toward the first end) can be higher in certain regions than a rotor with an otherwise similar structure but without flow openings (i.e. a rotor geometry that is closed toward the first end) (see e.g. Figure 3A and its description below). It has also been shown that the axial force characteristic curve of a rotor having a rotor geometry that is open toward the first end can be steeper in certain regions and monotonic over a greater range than a rotor having an otherwise similar structure but a rotor geometry that is closed toward the first end, (see e.g. Figure 3B and its description below).
[0023] Preferably, a plurality of fluid channels, in particular all fluid channels, which are arranged at regular intervals around the axis of rotation each have a flow opening of the type described.
[0024] It is conceivable that the flow opening of at least one and preferably each fluid channel extends along at least a portion of the extension of the fluid channel from the outlet opening towards the hub structure, in particular only along a portion. It is conceivable that the flow opening of at least one and preferably each fluid channel extends along the entire extension of the fluid channel from the outlet opening to the hub structure. By adjusting the extension of the flow opening along the extension of the fluid channel, the operating parameters of the pump and / or the rotor can be adjusted and / or weighed against each other within the above-mentioned parameter space, and taking into account the achievable simplification of rotor manufacturing. If the flow opening only extends along a portion of the above-mentioned fluid channel extension, for example, possible blood damage during operation and / or the sensitivity of the rotor position to externally acting torques and / or pump movements caused by external influences (such as rotation of the patient) can be limited.
[0025] A corresponding effect can also be achieved by partially limiting the fluid channel toward the first end using a protrusion (also called a winglet) of the blade. Thus, at least one, preferably each fluid channel, on its side facing the first end, at the same height as the flow opening, can be partially defined by a protrusion of the blade surface adjacent to the corresponding fluid channel. The protrusion can protrude from the blade surface adjacent to the corresponding fluid channel away from the direction of rotation of the rotor, and / or the surface can have a concave curvature (in a plane perpendicular to the axis of rotation). In this case, the above-mentioned effect of the protrusion can be particularly pronounced. The protrusion can protrude from the blade surface adjacent to the corresponding fluid channel along the direction of rotation of the rotor, and / or the surface can have a convex curvature (in a plane perpendicular to the axis of rotation). In this case, for example, since the convexly curved surface can be well approached, the manufacture of the rotor can be relatively simple.
[0026] The protrusion can be formed, for example, as a flat cover plate protruding vertically from the adjacent blade surface. Alternatively, the protrusion can be formed as a continuous continuation of the corresponding blade shape. The blade and / or the protrusion can be bent at least partially in a tangent plane parallel to the axis of rotation. By this bending, a protruding blade tip is formed, which serves as a protrusion with the advantages described. The blades or protrusions can be bent in the tangent plane so that they protrude in the direction of rotation of the rotor or in the opposite direction thereto. By forming the protrusion as a continuous continuation of the blade shape, the inertia of the rotor relative to the rotation about the axis of rotation can be reduced, and the efficiency of the rotor can be further improved relative to the embodiment with a vertically protruding cover plate by suppressing overflow vortices at the blade tip; in addition, blood damage can be reduced by the same mechanism as previously described. A protruding blade tip on the pressure side (convex surface) of the blade is advantageous for manufacturing because this side is more accessible to tools. Depending on the geometric parameters, a protruding blade tip on the suction side (concave surface) of the blade can bring about a greater efficiency improvement. Furthermore, by means of this curvature (compared to the "cover sheet" embodiment), a sharp edge is reduced or eliminated, which could otherwise lead to local relatively high shear rates and resulting blood damage (and / or - activation).
[0027] The hub structure may include an inlet channel extending along the axis of rotation and opening at a first end, the inlet channel being in fluid communication with a fluid channel in the rotor. Thus, the hub structure may act as a fluid inlet of the rotor, through which fluid entering the cavity inlet is directed to the blades. In particular, the fluid channel may have an inlet opening leading to the inlet channel.
[0028] The transition from the blade to the hub structure may be rounded. A rounded transition may be preferred from a manufacturing technology point of view and / or may result in improved fluid dynamics, such as reduced turbulence and / or reduced blood damage.
[0029] The rotor assembly including the blades may be integral, in particular formed by milling from a continuous piece of workpiece material. The integrally formed assembly including the blades may comprise at least a portion of the base plate and / or at least a portion of the hub structure. The hub structure may be formed as a separate hub assembly connectable or connectable to the assembly including the blades. The hub structure and the assembly including the blades may comprise mutually complementary alignment elements, which may for example form a flange connection and / or a groove connection and / or a pin connection.
[0030] The rotor may consist or be composed of a first component including at least a portion of the hub structure and at least one second component. The rotor may consist or be composed of the above-mentioned first component, a second component including at least another portion of the hub structure and at least one third component including at least a portion of the base plate.
[0031] The base plate may include a central recess for contactlessly accommodating a portion of the stator, in particular a pivot of the stator. The portion or pivot may include a magnet bearing assembly of the fluid pump, in particular one or more magnets of a stator magnet bearing assembly. The magnets of the rotor magnet assembly included in the base plate may be arranged around the central recess.
[0032] Proposed fluid pumps for cardiac support include:
[0033] A rotor of the above type; and
[0034] The stator has a cavity for accommodating the rotor and a stator magnet bearing assembly. The stator magnet bearing assembly forms a magnet bearing, especially an active magnet bearing, together with the rotor magnet assembly for supporting the rotor in the cavity in a non-contact manner.
[0035] The proposed rotor exerts its above-mentioned effects and advantages in the proposed fluid pump. The fluid pump can be further designed according to the above-mentioned optional features of the rotor. The rotor can include features corresponding to the optional features of the fluid pump.
[0036] The pump may include a control unit for controlling and / or regulating the rotation and / or position of the rotor in the cavity and / or may be connected or coupled to such a control unit. The pump may include one or more sensors for providing measurement signals corresponding to parameters of the rotation and / or position of the rotor and / or to other parameters, such as pressure and / or pressure difference and / or forces and / or torques acting on the rotor. The control unit may be arranged to control or regulate the rotation and / or position of the rotor based on the measurement signals.
[0037] For example, the control unit can be configured to detect a measurement signal detectable at the motor coils having a component that depends on the position and / or rotation of the rotor; this component can in particular correspond to a back electromotive force (Back Electromotive Force, Back-EMF) induced due to the rotation of the rotor. In this way, a measurement signal that can be used in particular to control and / or regulate the rotation and / or position of the rotor can be provided without the need for additional sensors.
[0038] Furthermore, for example, the control unit can be configured to adjust the rotor to a (particularly variable) target bearing position at which external forces acting on the rotor in the bearing action direction (for example along the axis of rotation) add up to a predetermined force, in particular zero force, and / or at which the power for controlling the control coil and / or the motor coil is minimal. By means of such an adjustment, also referred to as zero-force control, an energy-saving operation of the pump can be achieved.
[0039] Embodiments of the subject matter of the present application will be explained below with reference to the accompanying drawings, each of which schematically shows:
[0040] Figure 1A is a longitudinal sectional view of a fluid pump according to an example,
[0041] Figure 1B and Figure 1C yes Figure 1A A perspective view of a rotor of a fluid pump is shown,
[0042] Figure 2 is a perspective view of a rotor which does not correspond to the subject matter of the present application,
[0043] Figure 3A and Figure 3B Is has Figures 1A to 1C and Figure 2 Different characteristic curves of fluid pumps with rotors of the type shown,
[0044] Figure 4A and Figure 4B is a perspective view of a rotor according to another example,
[0045] Figure 5A and Figure 5B is a perspective view of a rotor according to another example,
[0046] Fig. 6A is a perspective view of an assembly of a rotor according to another example,
[0047] Figure 6B yes Fig. 6A Another perspective view of one of the components shown,
[0048] Fig. 7A is a perspective view of an assembly of a rotor according to another example,
[0049] Figure 7B yes Fig. 7A Another perspective view of one of the components shown,
[0050] Fig. 8A is a perspective view of an assembly of a rotor according to another example,
[0051] Figure 8B and Figure 8C yes Fig. 8A More views of the components shown.
[0052] Features that are repeated and similar in different embodiments are denoted by the same alphanumeric reference numerals in the drawings. Reference numerals that have already been explained or shown in connection with another figure may be omitted.
[0053] Figure 1A The fluid pump 100 shown includes a rotor 200 (in Figure 1B and Figure 1C The stator 300 is shown in other views in the figure and is formed as a housing. The stator 300 includes a cavity 310 for accommodating the rotor 200.
[0054] The rotor 200 includes a rotor magnet assembly 210 for contactlessly supporting the rotor 200 in the cavity 310, so that the rotor 200 can rotate about the rotation axis 400 to transport the fluid from the inlet 311 of the cavity 310 to the outlet of the cavity 312, and the first end 201 of the rotor 200 is closer to the inlet 311 than the second end 202 of the rotor 200 opposite to the first end 201 along the rotation axis 400. Features of the fluid pump 100 disposed closer to the first end 201 or the inlet 311 than the second end 202 or the outlet 312 are also referred to as inlet-side features, and features of the fluid pump 100 disposed closer to the second end 202 or the outlet 312 than the first end 201 or the inlet 311 are also referred to as outlet-side features.
[0055] The rotor 200 further comprises a hub structure 220 disposed at the first end 201, centered about the rotation axis 400, comprising one or more inlet-side rotor bearing magnets 211 of the rotor magnet assembly 210. For example, one or more annular and / or segmented inlet-side rotor bearing magnets 211 may be provided.
[0056] The rotor 200 further comprises a base plate 230 disposed at the second end 202, which has blades 240 for conveying a fluid, wherein the gaps between the blades 240 form fluid channels 241, which lead to corresponding outlet openings 242 and are delimited by the base plate 230 towards the second end 202. The base plate 230 may also be disposed between the hub structure 220 and the second end 202. The base plate 230 comprises a central recess 231 for contactlessly accommodating a pin plug 301 of the stator 300.
[0057] Fluid pump 100 is a rotary fluid pump, which is designed as a centrifugal pump. Alternatively, fluid pump can also be an axial flow pump or a hybrid form. Rotor 200 and fluid pump 100 are configured to transport blood as a fluid, for which inlet 311 and outlet 312 of cavity 310 can be connected or connected to the heart and / or a vascular fluid connected to the heart. Cavity 310 includes a volute 313, in which the fluid flowing out of fluid channel 241 is collected and transported to outlet 312.
[0058] The rotor 200 is omni-directionally non-contact magnetically supported in the cavity 300 ; in addition to magnetic forces, other types of forces, such as fluid dynamics, may also contribute to the support of the rotor 200 in the cavity 300 .
[0059] The stator 300 includes a stator magnet bearing assembly 320, which together with the rotor magnet assembly 210 forms a magnetic bearing for non-contact support of the rotor in the cavity. The rotor magnet assembly 210 is accordingly configured to interact magnetically with the stator magnet bearing assembly 320 to support the rotor 200 in the cavity. In particular, the rotor magnet assembly 210 and the stator magnet bearing assembly 320 form an active magnet bearing along the rotation axis 400. The rotor magnet assembly 210 and the stator magnet bearing assembly 320 are also configured to passively magnetically support the rotor 200 in a direction perpendicular to the rotation axis 400; alternatively, passive magnetic support may also be provided along the rotation axis and / or active magnetic support may be provided in a direction perpendicular to the rotation axis. In the described example, the rotor magnet assembly 210 includes a permanent magnet, and the stator magnet bearing assembly 320 includes an electromagnet having a coil and a permanent magnet. Other combinations of permanent magnets and / or inductive magnets and / or electromagnets may also be provided.
[0060] The rotor 200 is configured to form a brushless DC motor together with the stator 300 of the fluid pump 100, so that the rotor 200 can rotate around the rotation axis 400 to transport the fluid. To this end, the stator 200 and the rotor 300 form an axial flow motor; alternatively, the stator and the rotor can form another type of motor, such as a radial flow motor.
[0061] One or more inlet-side rotor bearing magnets 211 are configured to cooperate with at least one inlet-side control coil 321 of the stator magnet bearing assembly 320 to apply a force along the rotation axis 400 to the rotor 200 (a part of the active axial magnet bearing), wherein the force can be an attractive force or a repulsive force depending on the energization of the control coil 321. The rotor magnet assembly 210 also includes one or more outlet-side rotor motor magnets 212, which are configured to cooperate with the motor coil 322 of the outlet side of the stator magnet bearing assembly 320 to apply a torque relative to the rotation axis 300 to the rotor 200 (a part of the axial flow motor). Alternatively, a separate stator motor assembly with a motor coil can also be provided. In addition to cooperating with the motor coil 322 and / or other (herein shown or additional) parts of the stator magnet bearing assembly 320, the rotor motor magnet 212 can also be configured to apply a force along the rotation axis 400 (a part of the active axial magnet bearing), wherein the force can be an attractive force or a repulsive force depending on the energization of the motor coil 322. The rotor motor magnet 212 is disposed in the base plate. The base plate 230 may also additionally include one or more other magnets of the rotor magnet assembly 210, which may be configured to cooperate with the motor coil 322 and / or other (shown here or additional) portions of the stator magnet bearing assembly 320 to exert a force along the rotation axis 400.
[0062] One or more inlet-side rotor bearing magnets 211 together with one or more inlet-side stator bearing magnets 323 of the stator magnet bearing assembly 320 form an inlet-side passive radial magnet bearing. The rotor magnet assembly 210 also includes one or more outlet-side rotor bearing magnets 213, which together with one or more outlet-side stator bearing magnets 324 of the stator magnet bearing assembly 320 form an outlet-side passive radial magnet bearing. One or more outlet-side rotor bearing magnets 213 are arranged around the central groove 231 of the base plate 230. The pin plug 301 includes one or more outlet-side stator bearing magnets 324. By arranging two radial magnet bearings in the hub structure 220 and the base plate 230, the radial magnet bearings can in particular stabilize the inclination of the rotor relative to the rotation axis.
[0063] The described arrangement and combination of magnets of the rotor magnet assembly 210 and the stator magnet bearing assembly 320 are exemplary. Other arrangements and / or combinations and / or additions and / or omissions of magnets are possible. For example, the motor can be arranged on the inlet side instead of on the outlet side as here. The control coil can be arranged on the outlet side. The two radial magnet bearings can be arranged in a common plane, for example on the inside and outside of the base plate, instead of being axially spaced apart as here, or such a bearing arrangement can be provided in addition.
[0064] The hub structure 220 protrudes from the base plate 230 in the direction of the first end 201. The length l of the hub structure 220 protruding from the base plate 230 along the rotation axis 400 is approximately half of the total length L of the rotor 200 along the rotation axis 400. In other examples, the protruding length may be at least a quarter, at least a third, such as between 35% and 40% or between 40% and 45%, or at least half of the total length. The outer width b of the hub structure 220 perpendicular to the rotation axis 400 is approximately half of the total width B of the rotor 200 perpendicular to the rotation axis 400. In other examples, the outer width may be at least a third or at least half of the total width.
[0065] The hub structure 220 is substantially rotationally symmetrical with respect to the rotation axis 400. The hub structure 220 is substantially cylindrical, wherein the outer cross section of the hub structure 220 narrows toward the second end 202, and the inner cross section of the hub structure 220 widens toward the second end 202. In other examples, the hub structure may, for example, be at least partially substantially conical, or may have a cross section that varies in other ways along the rotation axis. The hub structure 220 has one or more cavities 221 for accommodating one or more inlet-side rotor bearing magnets 211.
[0066] The base plate 230 is substantially in the shape of a flat cylindrical disk. The base plate 230 forms a region completely enclosed around the rotation axis 400 and the central recess 231, and the region is in the shape of a cylindrical ring. The base plate 230 includes one or more cavities 232 for accommodating one or more outlet-side rotor bearing magnets 213 and one or more outlet-side rotor motor magnets 212.
[0067] The blade 240 includes a plurality of vanes 243, wherein a fluid passage 241 is formed between respective first and second sides 244, 245 of adjacent vanes 243 that are opposite to each other. The vanes 243 extend radially from a central region of the base plate 230 to an outer region of the base plate 230 in a spiral shape. Thus, the blade 240 is configured to act on the conveyed fluid with a radial flow component (in a direction toward the outlet opening 242) during operation. The vanes 243 or their sides 244, 245 are substantially perpendicular to the base plate 230 and parallel to the rotation axis 400, but may also be angled and / or curved relative to the rotation axis 400.
[0068] Each fluid channel 241 has a flow opening 246 connecting the fluid channel 241 with the cavity 310, and the flow opening extends between the outlet opening 242 and the hub structure 220 along the side of the fluid channel 241 facing the first end 201. Therefore, the rotor 200 is semi-open. The flow opening 246 of each fluid channel 241 extends along the entire extension of the fluid channel 241 from the outlet opening 242 to the hub structure 220. Alternatively, it is conceivable that the flow opening 246 of at least one, preferably each fluid channel 241, extends only along a portion of the fluid channel 241 extending from the outlet opening 242 toward the hub structure 220. It is also conceivable that only one or more, but not all, fluid channels 241 each have a flow opening 246 of the type described.
[0069] The hub structure 220 comprises an inlet channel 222 extending along the axis of rotation 400 and opening at the first end 201, which inlet channel is in fluid communication with a fluid channel 241 in the rotor 200. Thus, the hub structure 220 acts as a fluid inlet of the rotor 200, through which at least a portion (in particular a major portion) of the fluid entering the inlet 311 of the cavity 310 is directed to the blades 240. The fluid channel 241 has an inlet opening 247 leading to the inlet channel 222, through which the fluid can enter the fluid channel 241 from the inlet channel 222 during operation. Alternatively, it can also be envisaged that the fluid enters the fluid channel through a gap between the hub structure and the cavity wall. The transition 229 from the blades 240 to the hub structure 220 is rounded. Alternatively, the transition can be non-rounded.
[0070] The first component 250 of the rotor 200 including the blades 240 is integral, in particular formed by milling from a continuous workpiece material of metal. The first component 250 includes a portion of the base plate 230 and a portion of the hub structure 220. The rotor 200 includes an integrally formed second component 251, which includes a portion of the hub structure 220 arranged at the first end 201, and an integrally formed third component 252, which includes a portion of the base plate 230 arranged at the second end 202. One or more cavities 221 of the hub structure for accommodating magnets are formed between the first component 250 and the second component 251, and one or more cavities 232 of the base plate are formed between the first component 250 and the third component 252. Other divisions of the rotor 200 are possible, for example, the first component and / or the second component and / or the third component can be further divided into integrally formed components or sections.
[0071] The fluid pump 100 may include a control unit for controlling and / or regulating the rotation and / or position of the rotor 200 within the cavity 310, and / or may be connected or connected to such a control unit. The pump 100 may include one or more sensors for providing a measurement signal corresponding to a parameter of the rotation and / or position of the rotor 200 and / or corresponding to other parameters, such as pressure and / or pressure difference and / or force and / or torque acting on the rotor 200. The control unit may be configured to control or regulate the rotation and / or position of the rotor 200 based on the measurement signal. For example, the control unit may be configured to detect a measurement signal having a component that depends on the position and / or rotation of the rotor detectable at the motor coil 322; the component may in particular correspond to a back electromotive force (Back-EMF) induced due to the rotation of the rotor 200. Furthermore, for example, the control unit can be configured to adjust the rotor 200 to a (particularly variable) target bearing position, at which external forces acting on the rotor 200 along the bearing action direction (e.g. along the axis of rotation) add up to a predetermined force, in particular zero force, and / or at which the power used to control the control coils and / or motor coils 321, 322 is minimal.
[0072] Figure 2 (not related to the subject of the present application) shows a closed rotor 200'. The closed rotor 200' is similar to the Figures 1A to 1C200 ', the rotor 200 'is similar; however, in the rotor 200 ', the fluid channel 241 is delimited towards the first end 201 by a cover plate 260 opposite the base plate 230. The fluid channel 241 thus forms a cavity inside the rotor 200 '. The complex geometry thus formed is difficult to obtain by one-piece manufacturing (e.g. by milling). In addition, it is difficult to access the inner surface, which, for example, makes subsequent surface treatment difficult. In contrast, the structure of the semi-open rotor 200 allows simplified manufacturing as described above (in particular due to the flow openings 246, i.e. by omitting the cover plate 260).
[0073] Figure 3A and Figure 3B The characteristic curves shown in correspond to the use of a basic Figures 1A-1C (semi-open) and Figure 2 The rotors are respectively arranged in a manner similar to that shown in FIG. Figure 1A The pump is operated in a fluid pump of the type shown. Water is used as the fluid.
[0074] Figure 3A Shows Figures 1A to 1C The dp-Q characteristic curve 501 (solid line graph) and Figure 2 dp-Q characteristic curves (dashed line graph) of a closed rotor of the type shown. The dp-Q characteristic curve 501 of the semi-open rotor is steeper in the main region than the dp-Q characteristic curve 502 of the closed rotor.
[0075] Figure 3B Shows Figures 1A to 1C The axial force characteristic curve 503 (solid line graph) and Figure 2 Axial force characteristic curve of a closed rotor of the type shown (dashed line graph). The axial force characteristic curve 503 of the semi-open rotor has a higher steepness in the main area than the axial force characteristic curve 504 of the closed rotor. In addition, the axial force characteristic curve 503 of the semi-open rotor is monotonic over a wide range, and is particularly strictly monotonic in the range of data points measured in these areas, and is therefore particularly reversible. In contrast, the axial force characteristic curve 504 of the closed rotor has a reversal point and an almost flat (i.e., not strictly monotonic) area, and is not reversible over a wide range.
[0076] Figure 4A and Figure 4B The rotor 200A shown in FIG. 1 is substantially similar to the Figures 1A to 1C200A corresponds to the rotor 200 shown in FIG. In addition to its features, in the rotor 200A, each fluid channel 241 is partially defined by a protrusion 248 (winglet) of the second side 245 adjacent to the corresponding fluid channel 241 at the same height as the flow opening 246 on its side facing the first end 201. The protrusion 248 protrudes from the convexly curved (in a plane perpendicular to the rotation axis 400) second side 245 along the rotation direction of the rotor 200A. The protrusion 248 has an edge 249 at the end facing away from the second side 245 that basically follows the curvature of the second side 245 but is more strongly curved in, for example, certain areas. The edge 249 may also be straight in certain areas and / or be more weakly curved than the second side 245 in certain areas and / or be curved in the opposite direction to the curvature of the second side 245 in certain areas, for example. The protrusion 248 protrudes from the second side 245 substantially flatly and vertically. The protrusion 248 may also be angled or deviate from the planar shape (i.e., curved) relative to the second side 245.
[0077] Figure 5A and Figure 5B The rotor 200B shown in FIG. 1 is also substantially identical to the Figures 1A to 1C In addition to the features thereof, in rotor 200B, each fluid channel 241 is partially defined by a protrusion 248' (winglet) of the first side surface 244 adjacent to the corresponding fluid channel 241 at the same height as the flow opening 246 on the side thereof facing the first end 201. Figure 4A and Figure 4B Unlike the rotor 200A shown in the figure, the protrusion 248' of the rotor 200B protrudes from the concavely curved (in a plane perpendicular to the rotation axis 400) first side 244 away from the rotation direction of the rotor 200B. The protrusion 248' has an edge 249' at the end facing away from the first side 244 that substantially follows the curvature of the first side 244 and is curved opposite to the curvature in some areas. The edge 249' may also be straight in some areas and / or be curved weaker than the first side 244 in some areas and / or be curved more strongly than the first side 244 in some areas, for example. The protrusion 248' protrudes from the first side 244 substantially flatly and perpendicularly. The protrusion 248' may also be angled or deviate from a planar shape (i.e., curved) relative to the first side 244.
[0078] Fig. 8A and Figure 8B The rotor 200E shown in FIG. 1 is also substantially identical to the Figures 1A to 1CCorresponding to the rotor 200 shown in . In addition to its features, in rotor 200C, each fluid channel 241 is partially defined by a protrusion 248" on the surface of the corresponding blade 243 adjacent to the corresponding fluid channel 241 at the same height as the flow opening 246 on its side facing the first end 201. Unlike rotors 200A and 200B (in which each protrusion 248, 248' is formed as a flat cover plate protruding perpendicularly from each side 245, 244), each protrusion 248" of rotor 200E is formed as a continuous continuation of the shape of the corresponding blade 243. The blades 243 are bent in a tangential plane parallel to the rotation axis (400) so that they protrude away from the rotation direction of the rotor (200, 200A, 200B, 200C, 200D, 200E) in a plane perpendicular to the rotation axis. The blades can also protrude along the rotation direction.
[0079] Fig. 6A The rotor 200C shown in FIG. 1 is substantially similar to the Figures 1A to 1C 200C corresponds to the rotor 200 shown in FIG. 200C, but differs from the latter in the division of the components of the rotor 200C. The first component 250' of the rotor 200C including the blades 240 is integral, in particular formed by milling from a continuous workpiece material of metal. The first component 250' comprises at least a portion of the base plate 230. The hub structure 220 is formed as a separate hub component 270 (in FIG. Figure 6B The first component 250′ is shown in another perspective view in FIG. 200 , which includes a first hub component 271 disposed at the first end 201 and a second hub component 272 disposed between the first hub component 271 and the base plate 230. A cavity of the hub structure for accommodating a magnet is formed between the first hub component 271 and the second hub component 272. A fillet transition 229 is disposed on the first component 250′.
[0080] The second hub assembly 272 includes an alignment ring 273 protruding toward the second end 202. The first assembly 250' includes an alignment groove 274 toward the first end 201 for receiving the alignment ring 273. Alternatively, the first assembly 250' may include the alignment ring 273 and the second hub assembly 272 may include the alignment groove 274. The alignment ring 273 and the alignment groove 274 form a groove connection through which the first assembly 250' and the hub assembly 270 can be connected or connected to each other.
[0081] Fig. 7A The rotor 200D shown in FIG. 1 is substantially similar to the Figures 1A to 1C200D. The first component 250" of the rotor 200C including the blades 240 is integral, in particular formed by milling from a continuous workpiece material of metal. The first component 250" includes at least a portion of the base plate 230. The hub structure 220 is formed as a separate hub component 270' (in Figure 7B The hub structure is shown in another perspective view in FIG. 2 , which includes a first hub component 271' disposed at the first end 201 and a second hub component 272' disposed between the first hub component 271' and the base plate 230. A cavity of the hub structure for accommodating a magnet is formed between the first hub component 271' and the second hub component 272'. A rounded transition 229 is disposed on the second hub component 272'.
[0082] The second hub assembly 272' includes an alignment hole 275 toward the second end 202. The first assembly 250" includes an alignment pin 276 toward the first end 201, which can be received in each corresponding alignment hole 275. Alternatively, the first assembly 250" may include the alignment holes 275 and the second hub assembly 272' may include the alignment pin 276. The alignment holes 275 and the alignment pin 276 form a pin connection, through which the first assembly 250" and the hub assembly 270' can be connected or connected to each other.
[0083] This application also involves the following aspects:
[0084] 1. A rotor (200, 200A, 200B, 200C, 200D) of a fluid pump (100) for cardiac support, comprising:
[0085] A rotor magnet assembly (210) for non-contact support of a rotor (200, 200A, 200B, 200C, 200D) in a cavity (310) of a fluid pump (100), such that the rotor (200, 200A, 200B, 200C, 200D) can rotate about a rotation axis (400) to transport fluid from an inlet (311) of the cavity (310) to an outlet (312) of the cavity (310), and a first end (201) of the rotor (200, 200A, 200B, 200C, 200D) is closer to the inlet (311) than a second end (202) of the rotor (200, 200A, 200B, 200C, 200D) opposite the first end (201) along the rotation axis (400);
[0086] a hub structure (220) disposed at the first end (201) and centered about the axis of rotation (400), comprising one or more magnets of the rotor magnet assembly (210);
[0087] A base plate (230) disposed at the second end (202) or between the hub structure (220) and the second end (202), having blades (240) for conveying a fluid, wherein gaps between the blades (240) form fluid channels (241), the fluid channels (241) leading to respective outlet openings (242) and being delimited by the base plate (230) towards the second end (202);
[0088] At least one, preferably each, fluid channel (241) has a flow opening (246) connecting the fluid channel (241) to the cavity (310), the flow opening (246) extending at least partially along a first side of the fluid channel (241) toward the first end (201) between the outlet opening (242) and the hub structure (220).
[0089] 2. A rotor (200, 200A, 200B, 200C, 200D) according to aspect 1, wherein the flow opening (246) of at least one, preferably each fluid channel (241) extends along the fluid channel (241) from the outlet opening (242) toward at least a portion of the extension of the hub structure (220).
[0090] 3. A rotor (200, 200A, 200B, 200C, 200D) according to aspect 2, wherein the flow opening (246) of at least one, preferably each fluid channel (241) extends along the entire extension of the fluid channel (241) from the outlet opening (242) to the hub structure (220).
[0091] 4. A rotor (200, 200A, 200B, 200C, 200D) according to any of the preceding aspects, wherein at least one, preferably each, fluid channel (241) is partially delimited on a first side at the level of the flow opening (246) by a protrusion (248, 248') on the surface of the blade (240) adjacent to the respective fluid channel (241).
[0092] 5. The rotor (200, 200A, 200B, 200C, 200D) according to aspect 4, wherein the protrusion (248, 248') protrudes from the surface of the blade (240) adjacent to the corresponding fluid channel (241) away from the rotation direction of the rotor (200, 200A, 200B, 200C, 200D), and / or the surface has a concave curvature.
[0093] 6. The rotor (200, 200A, 200B, 200C, 200D) according to aspect 4, wherein the protrusion (248, 248') protrudes from the surface of the blade (240) adjacent to the corresponding fluid channel (241) along the rotation direction of the rotor (200, 200A, 200B, 200C, 200D), and / or the surface has a convex curvature.
[0094] 7. A rotor (200, 200A, 200B, 200C, 200D) according to any of the preceding aspects, wherein the hub structure (220) comprises an inlet channel (222) extending along the rotation axis (400) and opening at the first end (201), the inlet channel (222) being fluidically connected to a fluid channel (241) within the rotor (200, 200A, 200B, 200C, 200D).
[0095] 8. The rotor (200, 200A, 200B, 200C, 200D) according to any one of the preceding aspects, wherein the transition (229) from the blades (240) to the hub structure (220) is rounded.
[0096] 9. A rotor (200, 200A, 200B, 200C, 200D) according to any of the preceding aspects, wherein the components (250, 250', 250") of the rotor (200, 200A, 200B, 200C, 200D) including the blades (240) are integral, in particular by milling from a continuous workpiece.
[0097] 10. The rotor (200, 200A, 200B, 200C, 200D) of aspect 9, wherein the integrally formed component (250, 250', 250") including the blades (240) comprises at least a portion of the base plate (230) and / or at least a portion of the hub structure (220).
[0098] 11. A rotor (200, 200A, 200B, 200C, 200D) according to any of the preceding aspects, wherein the rotor (200, 200A, 200B, 200C, 200D) consists of or can be composed of a first component including at least a portion of a hub structure and at least one second component.
[0099] 12. The rotor (200, 200A, 200B, 200C, 200D) according to any one of the preceding aspects, wherein the base plate (230) comprises one or more magnets of the rotor magnet assembly (210).
[0100] 13. A rotor (200, 200A, 200B, 200C, 200D) according to any of the preceding aspects, wherein the base plate (230) comprises a central recess (231) for contactlessly accommodating a portion of a stator of a fluid pump (100), in particular a pin plug having a magnetic bearing assembly.
[0101] 14. A fluid pump (100) for cardiac support, comprising:
[0102] A rotor (200, 200A, 200B, 200C, 200D) according to any of the preceding aspects;
[0103] A stator (300) has a cavity (310) for accommodating a rotor (200, 200A, 200B, 200C, 200D) and a stator magnetic bearing assembly (320). The stator magnetic bearing assembly (320) forms a magnetic bearing, in particular an active magnetic bearing, together with a rotor magnet assembly (210) for non-contact support of the rotor (200, 200A, 200B, 200C, 200D) in the cavity (310).
[0104] 15. The fluid pump (100) according to aspect 14, wherein the fluid pump (100) is a centrifugal pump, and / or wherein the stator (300) and the rotor (200, 200A, 200B, 200C, 200D) form an axial flow motor.
[0105] List of reference numerals:
[0106] 100 Fluid Pumps
[0107] 200,200A,200B,200C,200D,200E Semi-open rotor
[0108] 200' Enclosed Rotor
[0109] 201 First End
[0110] 202 Second End
[0111] 210 Rotor Magnet Assembly
[0112] 211 Inlet side rotor bearing magnet
[0113] 212 Exit side rotor motor magnet
[0114] 213 Exit side rotor bearing magnet
[0115] 220 wheel hub structure
[0116] 221 Cavity
[0117] 222 Entryway
[0118] 229 Transition
[0119] 230 substrate
[0120] 231 Center groove
[0121] 232 Cavity
[0122] 240 blades
[0123] 241 Fluid Channel
[0124] 242 Exit opening
[0125] 243 Blades
[0126] 244 First side
[0127] 245 Second side
[0128] 246 Circulation opening
[0129] 247 Entrance Opening
[0130] 248,248',248” protrusion
[0131] 249,249' Edge
[0132] 250,250',250” First Component
[0133] 251 Second Component
[0134] 252 Third Component
[0135] 260 Cover
[0136] 270,270' wheel hub assembly
[0137] 271,271' First hub assembly
[0138] 272,272' Second hub assembly
[0139] 273 Alignment Ring
[0140] 274 Alignment slot
[0141] 275 Alignment hole
[0142] 276 Alignment pin
[0143] 300 Stator
[0144] 301 Pin plug
[0145] 310 Cavity
[0146] 311 Entrance
[0147] 312 Exit
[0148] 313 Snail
[0149] 320 Stator Magnetic Bearing Assembly
[0150] 321 Control coil
[0151] 322 Motor Coil
[0152] 323 Inlet side stator bearing magnet
[0153] 324 Exit side stator bearing magnet
[0154] 400 Rotation axis
[0155] 501 dp-Q characteristic curve, semi-open rotor
[0156] 502 dp-Q characteristic curve, closed rotor
[0157] 503 Axial force characteristic curve, semi-open rotor
[0158] 504 Axial force characteristic curve, closed rotor
[0159] l Protruding length
[0160] L Total length
[0161] b External width
[0162] B Overall width
Claims
1. A rotor (200, 200A, 200B, 200C, 200D, 200E) for a fluid pump (100) for cardiac support, the rotor comprising: A rotor magnet assembly (210) is used to support the rotor (200, 200A, 200B, 200C, 200D, 200E) in a non-contact manner within a cavity (310) of the fluid pump (100), so that the rotor (200, 200A, 200B, 200C, 200D, 200E) can rotate about a rotation axis (400) to transfer fluid from an inlet (311) of the cavity (310) to the fluid pump (100). ) is delivered to an outlet (312) of the chamber (310), and a first end (201) of the rotor (200, 200A, 200B, 200C, 200D, 200E) is closer to the inlet (311) than a second end (202) of the rotor (200, 200A, 200B, 200C, 200D, 200E) opposite to the first end (201) along the rotation axis (400); a hub structure (220) disposed at the first end (201) and centered about the rotation axis (400), the hub structure (220) comprising one or more magnets of the rotor magnet assembly (210); a base plate (230) arranged at the second end (202) or between the hub structure (220) and the second end (202), the base plate (230) having blades (240) for conveying the fluid, wherein gaps between the blades (240) form fluid channels (241) which lead to respective outlet openings (242) and are delimited by the base plate (230) towards the second end (202), At least one, preferably each fluid channel (241) has a flow opening (246) connecting the fluid channel (241) to the cavity (310), and the flow opening extends at least partially along the first side of the fluid channel (241) toward the first end (201) between the outlet opening (242) and the hub structure (220).
2. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to claim 1, wherein: The flow opening (246) of at least one, preferably each, fluid channel (241) extends along at least a portion of the fluid channel (241) extending from the outlet opening (242) towards the hub structure (220).
3. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to claim 2, wherein: The flow opening (246) of at least one, preferably each, of the fluid channel (241) extends along the entire extension of the fluid channel (241) from the outlet opening (242) to the hub structure (220).
4. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims, wherein: At least one, preferably each, fluid channel (241) is partially delimited on the first side at the level of the flow opening (246) by a protrusion (248, 248', 248") of the surface of the blade (240) adjacent to the respective fluid channel (241).
5. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to claim 4, wherein: The protrusion (248, 248', 248") protrudes from a surface of the blade (240) adjacent to the corresponding fluid channel (241) opposite to the rotation direction of the rotor (200, 200A, 200B, 200C, 200D, 200E), and / or the surface has a concave curvature in a plane perpendicular to the rotation axis (400).
6. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to claim 4, wherein: The protrusion (248, 248') protrudes from a surface of the blade (240) adjacent to the corresponding fluid channel (241) along the rotation direction of the rotor (200, 200A, 200B, 200C, 200D, 200E), and / or the surface has a convex curvature in the plane perpendicular to the rotation axis (400).
7. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of claims 4 to 6, wherein: The protrusion (248, 248", 248") is formed as a continuous continuation of the shape of a corresponding blade (243) of the blade (240), wherein the blade (243) and / or the protrusion (248, 248", 248") is at least partially curved in a tangent plane parallel to the rotation axis (400).
8. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims, wherein: The hub structure (220) includes an inlet passage (222) extending along the rotation axis (400) and opening at the first end (201), the inlet passage being in fluid communication with the fluid passage (241) within the rotor (200, 200A, 200B, 200C, 200D).
9. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to claim 7, wherein: The base plate (230) forms or includes a region which completely surrounds the rotation axis (400) in a closed manner, and the region is in particular substantially in the shape of a cylinder or a cylindrical ring.
10. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims, wherein: The transition (229) from the blades (240) to the hub structure (220) is rounded.
11. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims, wherein: The components (250, 250', 250") of the rotor (200, 200A, 200B, 200C, 200D, 200E) including the blades (240) are integral, in particular formed by milling from a continuous piece of workpiece material.
12. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to claim 9, wherein: An integrally formed assembly (250, 250', 250") comprising the blade (240) comprises at least a portion of the base plate (230) and / or at least a portion of the hub structure (220).
13. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims, wherein: The rotor (200, 200A, 200B, 200C, 200D, 200E) consists of or can consist of a first component including at least a portion of the hub structure and at least one second component.
14. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims, wherein: The base plate (230) includes one or more magnets of the rotor magnet assembly (210).
15. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to claim 14, wherein: One or more of the one or more magnets of the rotor magnet assembly (210) included in the substrate (230) is configured to cooperate with the stator magnet bearing assembly (320) of the fluid pump (210) to apply force to the rotor (200, 200A, 200B, 200C, 200D, 200E), in particular, to apply force along the rotation axis (400) so as to support the rotor (200, 200A, 200B, 200C, 200D, 200E) in a non-contact manner within the cavity (310).
16. The rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims, wherein: The base plate (230) comprises a central recess (231) for contactlessly accommodating a portion of a stator of the fluid pump (100), in particular a pin plug with a magnetic bearing assembly.
17. A fluid pump (100) for cardiac support, the fluid pump (100) comprising: A rotor (200, 200A, 200B, 200C, 200D, 200E) according to any one of the preceding claims; A stator (300) is provided, wherein the stator (300) has a cavity (310) for accommodating the rotor (200, 200A, 200B, 200C, 200D, 200E) and a stator magnet bearing assembly (320), wherein the stator magnet bearing assembly and the rotor magnet assembly (210) together form a magnet bearing, in particular an active magnet bearing, for contactlessly supporting the rotor (200, 200A, 200B, 200C, 200D, 200E) in the cavity (310).
18. The fluid pump (100) according to claim 17, wherein: The fluid pump (100) is a centrifugal pump, and / or wherein: The stator (300) and the rotor (200, 200A, 200B, 200C, 200D, 200E) form an axial flow motor.