Suspension device for a heart pump, heart pump and heart assist system

Abstract

The application relates to a suspension device for a heart pump, a rotor and a stator are configured to be capable of forming a static magnetic field, a magnetic suspension motor is configured to be used for driving the rotor to rotate, a plurality of modulation tooth bases are distributed in a ring shape in a circumferential direction, modulation coils are arranged on the modulation tooth bases, a position detection device is configured to be used for acquiring position data of the rotor, and a control device is electrically connected with the position detection device and the modulation coils. In the suspension device for the heart pump, the heart pump and the heart auxiliary system, the plurality of modulation magnetic fields generated by the plurality of modulation tooth bases are independent of each other, the distribution of the modulation magnetic fields in space is completely closed via a single modulation tooth base, the modulation magnetic fields with different vector directions do not interfere with each other, complete decoupling between the modulation magnetic fields can be realized, the defect that the modulation magnetic fields are prone to coupling is solved, the problem that the suspension stiffness of the heart pump is reduced due to the mutual coupling of the modulation magnetic fields is avoided, and the safety during long-term operation is maintained.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a suspension device for a heart pump, a heart pump, and a cardiac assist system. Background Technology

[0002] Currently, the main strategies for treating end-stage heart disease typically involve heart transplantation or implantation of a cardiac pump. A cardiac pump can also be implanted as a transitional measure while waiting for a heart transplant donor. Due to the scarcity of donors, the research and development of cardiac pumps is particularly significant for extending the lives of these patients. As a long-term ventricular assist device, the cardiac pump places high demands on its safety and stability. It is usually installed at the apex of the heart, with its inlet tube extending into the left ventricle and its outlet tube connected to the aortic arch. During operation, the cardiac pump draws blood from the left ventricle to the aortic arch. The pump rotor operates in a suspended manner, eliminating mechanical wear and minimizing damage to the blood.

[0003] In existing technologies, implantable heart pumps can use full magnetic levitation. However, the modulated magnetic field of full magnetic levitation is prone to coupling with each other in different degrees of freedom, which will lead to a decrease in the levitation stiffness of the heart pump. Long-term operation will increase the risk of blood damage. Summary of the Invention

[0004] Therefore, it is necessary to provide a levitation device, a heart pump, and a cardiac support system for heart pumps, addressing the problem of easy coupling of modulated magnetic fields in existing heart pumps.

[0005] This invention provides a levitation device for a heart pump, the levitation device for the heart pump comprising:

[0006] stator;

[0007] The rotor and the stator are configured to form a static magnetic field;

[0008] A magnetic levitation motor, the magnetic levitation motor being configured to drive the rotor to rotate;

[0009] Multiple modulation tooth holders are arranged in a ring around the circumference. A modulation coil is provided on each modulation tooth holder for forming a modulation magnetic field on the modulation tooth holder. The modulation magnetic field is configured to adjust the position of the rotor by interacting with the static magnetic field.

[0010] A position detection device, the position detection device being configured to acquire position data of the rotor;

[0011] A control device, which is electrically connected to the position detection device and the modulation coil, is used to control the modulation magnetic field on different modulation tooth holders according to the position data.

[0012] In one embodiment, both the stator and the rotor are annular components, with the rotor located in the inner ring of the rotor.

[0013] In one embodiment, the modulation tooth seat includes a connecting portion and an inner ring portion and an outer ring portion located at both ends of the connecting portion;

[0014] The stator includes an inner stator ring and an outer stator ring, the inner stator ring being disposed on the inner ring portion and the outer stator ring being disposed on the outer ring portion;

[0015] The rotor includes an inner rotor ring and an outer rotor ring connected to each other. The inner rotor ring and the outer rotor ring are both located between the inner stator ring and the outer stator ring. The inner rotor ring and the inner stator ring are configured to form a static magnetic field, and the outer rotor ring and the outer stator ring are configured to form a static magnetic field.

[0016] In one embodiment, the inner ring portion and the outer ring portion are vertically connected to both ends of the connecting portion, and the inner ring portion, the outer ring portion and the connecting portion form an accommodating space.

[0017] In one embodiment, the modulation coil is wound around the outer ring.

[0018] In one embodiment, the rotor includes:

[0019] A rotor core, which is connected between the inner ring of the rotor and the outer ring of the rotor.

[0020] In one embodiment, the rotor core is an annular component, with an inner annular groove formed on the inner side of the rotor core and an outer annular groove formed on the outer side of the rotor core. The inner ring of the rotor is disposed in the inner annular groove, and the outer ring of the rotor is disposed in the outer annular groove.

[0021] In one embodiment, the outer ring portion has at least one protrusion that protrudes toward at least one circumferential direction of the outer ring portion.

[0022] In one embodiment, the top surface of the protrusion is flush with the top surface of the outer ring, the thickness of the protrusion is a, and the distance between the lowest position of the inner ring or the outer ring of the rotor and the lowest position of the rotor core is b, where a = b.

[0023] In one embodiment, the magnetic levitation motor includes:

[0024] An electric motor stator, comprising a motor core and motor coils wound on the motor core shown;

[0025] The motor rotor, wherein the motor core and the motor rotor are configured to form a driving magnetic field, and the motor rotor is driven by the driving magnetic field.

[0026] In one embodiment, the levitation device for the heart pump includes:

[0027] A signal gain device is disposed on the rotor.

[0028] The present invention also provides a heart pump, the heart pump comprising:

[0029] A pump casing having an inner cavity, wherein the pump casing has an inlet and an outlet communicating with the inner cavity;

[0030] The levitation device is disposed within the inner cavity of the housing;

[0031] An impeller is mounted on the rotor.

[0032] In one embodiment, the housing cavity includes at least a flow channel chamber and an electrical chamber, the inlet and outlet of the pump housing are connected to the flow channel chamber, the rotor is located in the flow channel chamber, and the stator and the modulation gear seat are located in the electrical chamber.

[0033] In one embodiment, the heart pump includes:

[0034] A guide post is disposed within the flow channel cavity, the guide post having guide arc surfaces distributed from the center outwards, the impeller being an annular component surrounding the guide post; and / or,

[0035] A support base is disposed within the electrical cavity. The support base includes a base and a central protrusion located on the top of the base. A plurality of modulation tooth seats are evenly distributed circumferentially along the central protrusion.

[0036] In one embodiment, the heart pump includes:

[0037] An isolation ring is disposed in the inner cavity of the housing. The flow channel chamber and the electrical chamber are separated at least by the isolation ring. The isolation ring has an annular groove. The stator and the rotor are both annular components. The rotor is movably disposed in the annular groove. The stator surrounds the outside of the isolation ring. The rotor is indirectly disposed in the inner ring of the stator via the isolation ring.

[0038] The present invention also provides a cardiac assist system, the cardiac assist system comprising:

[0039] The heart pump;

[0040] An inlet pipe, which is connected to the inlet;

[0041] An outlet pipe, wherein the outlet pipe is connected to the outlet;

[0042] A cable, which is connected to the levitation device.

[0043] In the aforementioned suspension device, heart pump, and cardiac assist system used for heart pumps, the multiple modulation magnetic fields generated by multiple modulation tooth holders are independent of each other. The spatial distribution of the modulation magnetic field is completely closed by a single modulation tooth holder. The radial direction of the modulation tooth holder can be called the vector direction. At this time, the modulation magnetic fields in different vector directions will not interfere with each other, and can achieve complete decoupling. The modulation magnetic fields on different modulation tooth holders can be controlled individually, and the magnitude of their modulation magnetic force can be adjusted by controlling different modulation magnetic fields. This solves the defect that modulation magnetic fields are easy to couple, avoids the problem of decreased suspension stiffness of the heart pump caused by mutual coupling of modulation magnetic fields, maintains the safety of long-term operation, and avoids the risk of blood damage. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the use state of a heart pump provided in one embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the levitation device provided in one embodiment of the present invention;

[0046] Figure 3 This is a cross-sectional view of a levitation device provided in one embodiment of the present invention;

[0047] Figure 4 This is an exploded view of a levitation device provided in one embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the static magnetic field distribution of a levitation device provided in one embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the rotor axial offset of a suspension device provided in one embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram of rotor deflection of a suspension device provided in one embodiment of the present invention;

[0051] Figure 8 This is a schematic diagram of the rotor radial offset of a suspension device provided in one embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram illustrating the interaction between the static magnetic field and the modulated magnetic field of the levitation device provided in one embodiment of the present invention;

[0053] Figure 10This is a schematic diagram of the modulation magnetic field decoupling of a levitation device provided in one embodiment of the present invention;

[0054] Figure 11 This is a schematic diagram of the magnetic field direction of a motor rotor provided in one embodiment of the present invention;

[0055] Figure 12 This is a schematic diagram of the magnetic field of a magnetic levitation motor provided in one embodiment of the present invention.

[0056] Icon labels:

[0057] 001. Inlet pipe; 002. Outlet pipe; 003. Cable; 004. Static magnetic field; 005. Modulating magnetic field; 006. Driving magnetic field;

[0058] 100. Pump casing; 200. Rotor; 300. Stator; 400. Magnetic levitation motor; 500. Modulation gear seat; 600. Controller;

[0059] 110. Inlet; 120. Outlet; 130. Flow channel chamber; 140. Electrical chamber; 150. Isolation ring;

[0060] 210. Inner ring of rotor; 220. Outer ring of rotor; 230. Rotor magnetic core; 240. Impeller;

[0061] 310. Stator inner ring; 320. Stator outer ring;

[0062] 410. Motor core; 420. Motor coil; 430. Motor rotor;

[0063] 510. Connecting part; 520. Inner ring part; 530. Outer ring part; 540. Accommodating space; 550. Modulation coil;

[0064] 131. Guide post; 132. Support base; 133. Base; 134. Central protrusion;

[0065] 151. Annular groove;

[0066] 231. Inner annular groove; 232. Outer annular groove;

[0067] 531. Protrusion;

[0068] 610. Signal gain devices. Detailed Implementation

[0069] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0075] See Figures 1 to 12 As shown, one embodiment of the present invention provides a levitation device for a heart pump. The levitation device includes a stator 300, a rotor 200, a magnetic levitation motor 400, multiple modulation gear seats 500, a position detection device, and a control device 600. The rotor 200 and the stator 300 are configured to form a static magnetic field 004. The rotor 200 is configured to drive an impeller 240, and the magnetic levitation motor 400 is configured to drive the rotor 200 to rotate, such as through a fixed axis. The multiple modulation gear seats 500 are arranged in a ring. The modulation tooth holder 500 is circumferentially distributed and equipped with a modulation coil 550 for forming a modulation magnetic field 005 on the modulation tooth holder 500. The modulation magnetic field 005 is configured to adjust the position of the rotor 200 by interacting with the static magnetic field 004. The position detection device is configured to acquire the position data of the rotor 200. The control device 600 is electrically connected to the position detection device and the modulation coil 550 and is used to control the modulation magnetic field 005 on different modulation tooth holders 500 according to the position data.

[0076] The levitation device can be installed inside the heart pump to provide driving force to drive the impeller 240 to pressurize the blood. After a static magnetic field 004 is formed between the rotor 200 and the stator 300, the static magnetic field 004 can maintain the relative position between the stator 300 and the rotor 200 at a preset equilibrium position. For example, the rotor 200 is located approximately at the center of the stator 300. Alternatively, the static magnetic field 004 can work together with the modulated magnetic field 005 to form a synthetic magnetic force, maintaining the relative position between the stator 300 and the rotor 200 at the preset equilibrium position. This allows the rotor 200 to be in a stable magnetic levitation state relative to the stator 300. The stator 300 remains stationary after assembly, while the rotor 200 remains movable relative to the stator 300. Therefore, driven by the magnetic levitation motor 400, the rotor 200 can rotate relative to the stator 300 in a magnetic levitation state, thereby driving the impeller 240 to pressurize the blood.

[0077] See Figure 5As shown, the static magnetic field 004 can form a static magnetic force between the stator 300 and the rotor 200. The magnetization direction of the stator 300 and the rotor 200 can be axial. Guided by the modulation gear seat 500, the static magnetic field 004 can be distributed between the modulation gear seat 500 and the rotor 200. The magnetic field lines between the stator 300 and the rotor 200 run radially, so the static magnetic force can act in this direction to pull the rotor 200. (See reference...) Figures 6 to 8 As shown, the static magnetic force will generate torque forces such as axial offset restoring force and yaw restoring torque. The magnitude of the static magnetic force also increases with the degree to which the rotor 200 deviates from the equilibrium position. Taking the radial offset of the rotor 200 as an example, such as... Figure 6 When the rotor 200 is subjected to radial disturbance, if the rotor 200 is close to the left outer side of the modulation tooth holder 500, the opposite side of the rotor 200 will be close to the right inner side of the modulation tooth holder 500 accordingly. The static magnetic field 004 is enhanced on the left outer side and right inner side of the modulation tooth holder 500, and correspondingly weakened on the left inner side and right outer side of the modulation tooth holder 500. At this time, it is necessary to use the modulation magnetic field 005 to form a synthetic magnetic force to restore the rotor 200 to the equilibrium position.

[0078] See Figure 9 As shown, when the modulation coil 550 is energized, a modulation magnetic field 005 is formed and loaded into the modulation tooth holder 500. The modulation magnetic field 005 formed on the modulation tooth holder 500 can form a modulation magnetic force. The modulation magnetic force can interact with the static magnetic force, weakening the static magnetic field 004 on the left outer side and right inner side of the modulation tooth holder 500, while strengthening the static magnetic force on the left inner side and right outer side of the modulation tooth holder 500, overcoming the radial bias force generated by the static magnetic force, thereby pulling the rotor 200 back to the preset equilibrium position.

[0079] The suspension device is equipped with multiple modulation tooth holders 500, each of which can form a separate modulation magnetic field 005. The multiple modulation tooth holders 500 are arranged in a ring around the circumference. Therefore, at different positions in the circumference, an independent modulation magnetic force can be formed by the individual modulation magnetic field 005. By controlling the modulation magnetic field 005 on different modulation tooth holders 500, the magnitude of the modulation magnetic force can be controlled individually. Thus, different modulation magnetic forces can be applied to the rotor 200 at different positions in the circumference, and the position of the rotor 200 can be adjusted according to the actual offset or torsion of the rotor 200.

[0080] The multiple modulation magnetic fields 005 generated by the multiple modulation tooth holders 500 are independent of each other. The spatial distribution of the modulation magnetic fields 005 is completely closed by a single modulation tooth holder 500. The radial direction of the modulation tooth holder 500 can be called the vector direction. At this time, the modulation magnetic fields 005 in different vector directions will not interfere with each other, and can achieve complete decoupling. The modulation magnetic fields 005 on different modulation tooth holders 500 can be controlled individually, and the magnitude of their modulation magnetic force can be adjusted by controlling different modulation magnetic fields 005. This solves the defect that the modulation magnetic fields 005 are easy to couple. It can avoid the problem of the decrease in the suspension stiffness of the heart pump caused by the mutual coupling of the modulation magnetic fields 005, maintain the safety of long-term operation, and avoid the risk of blood damage.

[0081] The number of multiple modulation tooth holders 500 can be even. When multiple modulation tooth holders 500 are evenly arranged circumferentially, it can be ensured that there are two pairs of symmetrical modulation tooth holders 500 in the radial direction. At this time, two radially symmetrical modulation tooth holders in any vector direction can form a fit. The resultant force formed by the two symmetrical modulation magnetic fields 005 acts on the rotor 200 and interacts with the static magnetic force, which can reduce the modulation current loaded in the modulation coil 550. Figure 10 As shown, the offset direction of rotor 200 not only occurs exactly in the vector direction of modulation tooth holder 500, but it is also more likely to occur between the vector directions of two adjacent modulation tooth holders 500. In this way, the modulation magnetic field 005 used to balance the static magnetic force can be jointly acted by adjacent modulation tooth holders 500. Therefore, the required modulation current can be jointly borne by the modulation tooth holders 500 in both directions. This can further reduce the modulation current in a single modulation coil 550 and effectively control the heating of the suspension device.

[0082] For example, multiple modulation tooth holders 500 are evenly distributed circumferentially, and the number can be selected as 3, 4, 6, or 8, etc. See further... Figure 10 As shown, taking the cooperation of six modulation tooth holders 500 as an example, the modulation magnetic field 005 can divide the position of the rotor 200 on the rotation plane into six sector regions, each sector occupying 60°. If the rotor 200 is offset into sector 1, the modulation tooth holders 500 at A1 and B1 can be positively energized, while the modulation tooth holders 500 at A2 and B2 can be negatively energized. The resulting modulation magnetic force will point towards the origin of the coordinate system. If the rotor 200 is in... Figure 10 As shown, on axis A1 between sector 6 and sector 1, a positive current can be applied to the modulation gear 500 at A1, while a negative current can be applied to the modulation gear 500 at A2. The resulting modulation magnetic force will point towards the origin of the coordinate system. Similarly, this modulation action, which pulls the rotor 200 back to its original equilibrium position (such as the central position), effectively maintains the stable magnetic levitation state of the heart pump during operation.

[0083] In use, the position data of the rotor 200 can be obtained using a position detection device. This position data includes, but is not limited to, the axial offset, yaw, and radial offset of the rotor 200 caused by static magnetic force. In addition, the position data may also include other data on the rotor 200's deviation from the equilibrium position. The control device 600 is electrically connected to the position detection device and the modulation coil 550. By obtaining the position data, the current position of the rotor 200 can be known, which can then be used as a modulation basis. At this time, the modulation magnetic field 005 on different modulation tooth seats 500 can be controlled according to the position data. The strength of the modulation magnetic field 005 can be controlled by controlling the magnitude of the modulation current in the modulation coil 550, so that different modulation magnetic fields 005 form modulation magnetic forces of different magnitudes. Corresponding modulation magnetic forces are applied to the rotor 200 at different circumferential positions to overcome the changes in static magnetic force, so that the rotor 200 is pulled back to the equilibrium position, maintaining the stable magnetic levitation state of the heart pump during operation.

[0084] In order to improve the sensitivity of the position detection device to position data acquisition, in one embodiment, the suspension device for the heart pump may further include a signal gain device 610, which is disposed on the rotor 200, for example, a signal gain ring, disposed along the circumference and providing a circumferential signal gain effect.

[0085] The specific structures of the stator 300 and rotor 200 can be selected according to requirements. For example, the stator 300 can be set as a ring, or the rotor 200 can be set as a ring. In addition, the stator 300 or rotor 200 can also be set as a plate, a disc, etc. The structural shape of the stator 300 and rotor 200 assembled together can be satisfied as long as it can form a static magnetic field 004. Those skilled in the art can select a suitable structural shape to form the stator 300 and rotor 200 according to requirements. In one embodiment, the stator 300 and the rotor 200 can both be rings. The rotor 200 is located in the inner ring of the rotor 200. At this time, the rotor 200 can rotate relative to the stator 300 in the inner ring of the stator 300. At the same time, the center of the inner ring of the stator 300 can be used as the balance position of the rotor 200.

[0086] In one specific embodiment, the modulation gear holder 500 includes a connecting portion 510 and an inner ring portion 520 and an outer ring portion 530 located at both ends of the connecting portion 510. The stator 300 includes a stator inner ring 310 and a stator outer ring 320. The stator inner ring 310 is disposed on the inner ring portion 520, and the stator outer ring 320 is disposed on the outer ring portion 530. The rotor 200 includes a rotor inner ring 210 and a rotor outer ring 220 connected to each other. The rotor inner ring 210 and the rotor outer ring 220 are both located between the stator inner ring 310 and the stator outer ring 320. The rotor inner ring 210 and the stator inner ring 310 are configured to form a static magnetic field 004, and the rotor outer ring 220 and the stator outer ring 320 are configured to form a static magnetic field 004. The cooperation between the rotor inner ring 210 and the stator inner ring 310, and the cooperation between the rotor outer ring 220 and the stator outer ring 320, can simultaneously form two cooperating static magnetic fields 004 from the inner (which can be understood as the center) and outer sides of the stator 300 and the rotor 200. The two static magnetic fields 004 can form magnetic coordination from the inner and outer sides, improving the stability of the rotor 200 operation.

[0087] The modulation gear holder 500 can be configured into a suitable structural shape according to its assembly with the stator 300 and rotor 200. For example, it can be a regular block shape or an irregular structure, as long as it can form a modulation magnetic field 005. In one embodiment, the inner ring portion 520 and the outer ring portion 530 are vertically connected to both ends of the connecting portion 510, and the inner ring portion 520, the outer ring portion 530 and the connecting portion 510 form an accommodating space 540. At this time, the stator inner ring 310 can be located at the top of the inner ring portion 520, and the stator outer ring 320 can be located at the top of the outer ring portion 530. The rotor inner ring 210 and the rotor outer ring 220 are also located at the same height. At this time, the modulation coil 550 can be wound on the outer ring portion 530. After a modulation current is passed through the modulation coil 550, a ring-shaped modulation magnetic field 005 can be formed along the inner ring portion 520, the connecting portion 510 and the outer ring portion 530.

[0088] The inner ring 210 and outer ring 220 of the rotor are distributed within the two cylindrical surfaces of the rotor 200. In order to make the distribution of the static magnetic field 004 more concentrated, in one embodiment, the rotor 200 may also include a rotor core 230, which is connected between the inner ring 210 and the outer ring 220. The thickness of the rotor core 230 can be matched with the modulation tooth seat 500 to ensure the horizontal distribution of the static magnetic field 004, thereby ensuring the recovery of the static magnetic force from axial and yaw.

[0089] In one embodiment, the rotor core 230 is an annular component. An inner annular groove 231 is formed on the inner side of the rotor core 230, and an outer annular groove 232 is formed on the outer side of the rotor core 230. The rotor inner ring 210 is disposed in the inner annular groove 231, and the rotor outer ring 220 is disposed in the outer annular groove 232. In this way, the rotor core 230 can be assembled between the rotor inner ring 210 and the rotor outer ring 220, and the rotor 200 is formed into an annular component.

[0090] In one embodiment, the outer ring portion 530 has at least one protrusion 531, which protrudes toward at least one circumferential direction of the outer ring portion 530. Furthermore, the protrusion of the protrusion 531 is radially outward around the center, allowing the protrusion 531 to face the rotor core 230. For example, the protrusion 531 can be a side-protruding arc-shaped rod, arc-shaped plate, or other structure. By surrounding the center, the direction of the modulation magnetic field 005 is kept radially in place, preventing the modulation magnetic field 005 from diverging and achieving the effect of concentrating the modulation magnetic field 005. Preferably, in this embodiment, the top of the outer ring portion 530 with the protrusion 531 is arc-shaped around the center. The top surface of the protrusion 531 can be flush with the top surface of the outer ring 530. If the thickness of the protrusion 531 is a, and the distance between the lowest position of the inner ring 210 of the rotor or the lowest position of the outer ring 220 of the rotor and the lowest position of the rotor core 230 is b, then a = b can be controlled. Of course, a ≠ b can also be controlled, but it is necessary to ensure that the value of a in the circumferential direction of the protrusion 531 remains consistent, and to ensure that the value of b remains consistent in the circumferential direction.

[0091] In particular, the rotor inner ring 210 is disposed in the inner ring groove 231, the rotor outer ring 220 is disposed in the outer ring groove 232, the stator inner ring 310 is disposed at the top of the inner ring portion 520, the stator outer ring 320 is disposed at the top of the outer ring portion 530, and the rotor inner ring 210 and rotor outer ring 220 are also located at the same height. At this time, the distance between the lowest position of the rotor 200 and the lowest position of the rotor core 230 is b, that is, the distance between the mounting plane of the rotor inner ring 210 or the rotor outer ring 220 and the lowest position of the rotor core 230.

[0092] In one embodiment, the magnetic levitation motor 400 includes a motor stator 300 and a motor rotor 430. The motor stator 300 includes a motor core 410 and a motor coil 420 wound on the motor core 410. The motor core 410 and the motor rotor 430 are configured to form a driving magnetic field 006. The motor rotor 430 is driven by the driving magnetic field 006 and the rotor 200, thereby causing the rotor 200 to rotate.

[0093] The magnetic levitation motor 400 can be a brushless DC disc motor. The motor rotor 430 can be made of high-energy-product neodymium iron boron material. The permanent magnet magnetic field of the motor rotor 430 is directed downwards and arranged in a Halbec pattern. Figure 11 and Figure 12 As shown, in one embodiment, a motor rotor 430 with 16 magnets can be used. × represents the magnetization direction of entering the paper, and · represents exiting the paper. This can effectively utilize the magnetic field of the magnets while reducing magnetic leakage on the back of the magnets.

[0094] This invention also provides a heart pump, comprising a pump housing 100, a suspension device, and an impeller 240. The pump housing 100 has an inner cavity, and an inlet 110 and an outlet 120 communicating with the inner cavity are provided on the pump housing 100. The suspension device is disposed in the inner cavity, and the impeller 240 is disposed on the rotor 200. After the suspension device is assembled in the inner cavity, waterproofing measures can be implemented for parts of the structure using methods such as wrapping or isolation, depending on the waterproofing requirements of the circuit connection; this is not limited here. Furthermore, the pump housing 100 can be constructed by splicing multiple partial shell structures, for example, by splicing an upper shell and a lower shell; this is not limited here. The impeller 240 may have a blade structure, and the rotation of the impeller 240 in the inner cavity can pressurize the blood.

[0095] In one embodiment, the housing cavity includes at least a flow channel chamber 130 and an electrical chamber 140. The flow channel chamber 130 is for blood flow, and the electrical chamber 140 is for power device assembly. The flow channel chamber 130 and the electrical chamber 140 are isolated from each other, providing a waterproof barrier. The inlet 110 and outlet 120 of the pump housing 100 are connected to the flow channel chamber 130. The rotor 200 is located in the flow channel chamber 130, and the stator 300 and the modulation gear seat 500 are located in the electrical chamber 140. The flow channel chamber 130 can be configured as a volute structure within the housing cavity, and the impeller 240 can work in conjunction with the volute-structured flow channel chamber 130 to pressurize the blood.

[0096] In one embodiment, the heart pump includes a guide post 131 disposed within the flow channel chamber 130. The guide post 131 has a guide arc surface distributed from the center outwards. The impeller 240 is an annular component surrounding the guide post 131. The guide arc surface of the guide post 131 guides blood to the surrounding area, and the rotation of the impeller 240 increases pressure. The heart pump may also include a support base 132 disposed within the electrical chamber 140. The support base 132 includes a base 133 and a central protrusion 134 located on the top of the base 133. Multiple modulation gear seats 500 are evenly distributed circumferentially along the central protrusion 134. The support base 132 can provide a mounting foundation for the modulation gear seats 500, the magnetic levitation motor 400, and the control device 600.

[0097] In one embodiment, the heart pump includes an isolation ring 150 disposed within the housing cavity. The flow channel chamber 130 and the electrical chamber 140 are separated at least by the isolation ring 150. Additionally, the assembly of components such as a support base 132 can also form an isolation between the flow channel chamber 130 and the electrical chamber 140. The isolation ring 150 has an annular groove 151. Both the stator 300 and the rotor 200 are annular components. The rotor 200 is movably disposed within the annular groove 151, and the stator 300 surrounds the isolation ring 150. The rotor 200 is indirectly disposed within the inner ring of the stator 300 via the isolation ring 150. When the rotor 200 runs within the annular groove 151, a gap is formed between the rotor 200 and the annular groove 151. This gap communicates with the flow channel chamber 130, forming a secondary flow channel. Blood can flow within this secondary flow channel, thereby flushing the rotor 200 and preventing thrombus formation.

[0098] When the inner ring portion 520 and the outer ring portion 530 are vertically connected to both ends of the connecting portion 510, and a receiving space 540 is formed between the inner ring portion 520, the outer ring portion 530 and the connecting portion 510, the modulation tooth seat 500 uses the receiving space 540 to accommodate a portion of the isolation ring 150. Specifically, the modulation tooth seat 500 can span across both sides of the isolation ring 150.

[0099] The present invention also provides a cardiac assist system, comprising a cardiac pump, an inlet pipe 001, an outlet pipe 002, and a cable 003. The inlet pipe 001 is connected to the inlet 110, the outlet pipe 002 is connected to the outlet 120, and the cable 003 is connected to the levitation device, the connection including a power supply connection or a data transmission connection. This cardiac assist system can be used to treat end-stage heart failure by using the cardiac pump to assist the ventricles in pumping blood, thereby compensating for the insufficient ventricular pumping capacity caused by heart failure.

[0100] In use, a hole can be drilled at the apex of the heart, a suture ring can be installed in the hole, and the heart pump can be fixed on the suture ring. The heart pump is installed at the apex of the heart in this way. At the same time, the inlet tube 001 extends into the left ventricular cavity, and the outlet tube 002 is connected to the aortic arch. When the heart pump is running, it can pump the blood of the patient's left ventricle to the aortic arch or lungs, thereby reducing the burden on the myocardium of the ventricle. The heart pump can be powered by a percutaneous power cable 003. The outer layer of the percutaneous power cable 003 can be covered with a flexible implantable material, pass through the subthoracic diaphragm, and be led out from the patient's abdomen.

[0101] The rotor 200 in the heart pump operates under magnetic levitation, thus avoiding mechanical wear and minimizing damage to the blood. The heart assist system can also be equipped with external controllers, power supplies, etc., as needed, which will not be elaborated here. Those skilled in the art can choose according to their needs.

[0102] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A suspension device for a heart pump, characterized in that, The suspension device for the heart pump includes: stator; The rotor and the stator are configured to form a static magnetic field; A magnetic levitation motor, the magnetic levitation motor being configured to drive the rotor to rotate; Multiple modulation tooth holders are arranged in a ring around the periphery. A modulation coil is provided on each modulation tooth holder to form a modulation magnetic field. The modulation magnetic field is configured to adjust the position of the rotor by interacting with the static magnetic field. Each modulation tooth holder includes a connecting portion and an inner ring portion and an outer ring portion located at both ends of the connecting portion. The outer ring portion has at least one protrusion. The rotor includes an inner rotor ring and an outer rotor ring connected to each other. The thickness of the protrusion is 'a'. The distance between the lowest position of the inner rotor ring or the outer rotor ring and the lowest position of the rotor core is 'b', where a = b. A position detection device, the position detection device being configured to acquire position data of the rotor; A control device, which is electrically connected to the position detection device and the modulation coil, is used to control the modulation magnetic field on different modulation tooth holders according to the position data.

2. The suspension device for a heart pump according to claim 1, characterized in that, Both the stator and the rotor are annular components, with the rotor located in the inner ring of the rotor.

3. The suspension device for a heart pump according to claim 2, characterized in that, The stator includes an inner stator ring and an outer stator ring, the inner stator ring being disposed on the inner ring portion and the outer stator ring being disposed on the outer ring portion; The rotor inner ring and the rotor outer ring are both located between the stator inner ring and the stator outer ring. The rotor inner ring and the stator inner ring are configured to form a static magnetic field, and the rotor outer ring and the stator outer ring are configured to form a static magnetic field.

4. The suspension device for a heart pump according to claim 3, characterized in that, The inner ring portion and the outer ring portion are vertically connected to the two ends of the connecting portion, and the inner ring portion, the outer ring portion and the connecting portion form an accommodating space.

5. The suspension device for a heart pump according to claim 3, characterized in that, The modulation coil is wound around the outer ring.

6. The suspension device for a heart pump according to claim 3, characterized in that, The rotor includes: A rotor core, which is connected between the inner ring of the rotor and the outer ring of the rotor.

7. The suspension device for a heart pump according to claim 6, characterized in that, The rotor core is a ring-shaped component. An inner ring groove is formed on the inner side of the rotor core, and an outer ring groove is formed on the outer side of the rotor core. The inner ring of the rotor is disposed in the inner ring groove, and the outer ring of the rotor is disposed in the outer ring groove.

8. The suspension device for a heart pump according to claim 6, characterized in that, The protrusion protrudes toward at least one circumferential direction of the outer ring portion.

9. The suspension device for a heart pump according to claim 8, characterized in that, The top surface of the protrusion is flush with the top surface of the outer ring.

10. The suspension device for a heart pump according to any one of claims 1-9, characterized in that, The magnetic levitation motor includes: An electric motor stator, comprising a motor core and motor coils wound on the motor core shown; The motor rotor, wherein the motor core and the motor rotor are configured to form a driving magnetic field, and the motor rotor is driven by the driving magnetic field.

11. The suspension device for a heart pump according to any one of claims 1-9, characterized in that, The suspension device for the heart pump includes: A signal gain device is disposed on the rotor.

12. A heart pump, characterized in that, The heart pump includes: A pump casing having an inner cavity, wherein the pump casing has an inlet and an outlet communicating with the inner cavity; The levitation device as described in any one of claims 1-11 is disposed within the inner cavity of the housing; An impeller is mounted on the rotor.

13. The heart pump according to claim 12, characterized in that, The housing cavity includes at least a flow channel chamber and an electrical chamber. The inlet and outlet of the pump housing are connected to the flow channel chamber. The rotor is located in the flow channel chamber, and the stator and the modulation gear seat are located in the electrical chamber.

14. The heart pump according to claim 13, characterized in that, The heart pump includes: A guide post is disposed within the flow channel cavity, the guide post having guide arc surfaces distributed from the center outwards, the impeller being an annular component surrounding the guide post; and / or, A support base is disposed within the electrical cavity. The support base includes a base and a central protrusion located on the top of the base. A plurality of modulation tooth seats are evenly distributed circumferentially along the central protrusion.

15. The heart pump according to claim 13, characterized in that, The heart pump includes: An isolation ring is disposed in the inner cavity of the housing. The flow channel chamber and the electrical chamber are separated at least by the isolation ring. The isolation ring has an annular groove. The stator and the rotor are both annular components. The rotor is movably disposed in the annular groove. The stator surrounds the outside of the isolation ring. The rotor is indirectly disposed in the inner ring of the stator via the isolation ring.

16. A cardiac assist system, characterized in that, The cardiac support system includes: The heart pump as described in any one of claims 12-15; An inlet pipe, which is connected to the inlet; An outlet pipe, wherein the outlet pipe is connected to the outlet; A cable, which is connected to the levitation device.

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