CN115501476A - Unsettled strutting arrangement of rotor for blood pump - Google Patents

Abstract

The invention discloses a rotor suspension supporting device for a blood pump, which comprises a supporting component, a volute with an annular volute cavity and a rotor component, wherein the volute is hermetically arranged on the supporting component, a liquid flowing cavity is formed between the supporting component and the volute, a containing cavity is formed in the supporting component, the flowing cavity is communicated with the containing cavity, a second permanent magnet component with a cone shape is arranged at the center of the top of the rotor component, the volute surrounded by the annular volute cavity is a top cover, a cone protrusion for guiding blood is arranged on the inner side wall of the top cover, a first permanent magnet component with a cone shape is arranged in the cone protrusion, and the rotor component is suspended in the containing cavity under the magnetic force action of the first permanent magnet component and the second permanent magnet component. The invention has the beneficial effects that: the second permanent magnet assembly is arranged on the rotor assembly, the first permanent magnet assembly is arranged in the volute, and the rotor assembly can automatically center under the magnetic action of the first permanent magnet assembly and the second permanent magnet assembly to suspend in the accommodating cavity, so that the rotor assembly is convenient to install.

Description

Unsettled strutting arrangement of rotor for blood pump

Technical Field

The invention relates to an implantable heart assist device, in particular to a rotor suspension supporting device for a blood pump.

Background

The use of implantable heart assist devices to achieve long-term circulatory support has become a clinically effective method for treating advanced heart failure. The "continuous blood pump" developed rapidly in recent years is relatively suitable for long-term in vivo implantation. The continuous flow blood pump mainly comprises an axial flow pump and a centrifugal pump, and the impeller rotating at high speed is adopted to drive blood to flow. The traditional impeller supporting system is a mechanical bearing, can limit the movement of a rotating impeller in the radial direction and the axial direction, and has high rigidity and compact structure. Mechanical bearings have the disadvantage that the mutually sliding contact surfaces during operation generate friction, wear and local temperature increases, forming blood stagnation zones and thrombus attachment points around the bearing. The impeller, which is rotated at high speed by the third generation implantable cardiac assist device, is supported by a suspension bearing, such as the "HeartMate 3" and "HeartWare HVAD" centrifugal pumps that are currently in common use in the united states. Blood pumps implanted in the body for long-term use need to overcome some important disadvantages, such as: thromboembolism, bleeding, infection, blood pump wear and blood component destruction, and the like. The five-degree-of-freedom full-suspension impeller controlled by magnetic force has large volume, is difficult to implant in patients with small stature, and is not suitable for Asian people and children.

The blood pump is small in size and implanted into a human body, the blood pump can generate heat in the working process of the blood pump, if the power of the blood pump is large, the heat productivity of the blood pump is also large, the human body fever is easily caused, and the blood pump has requirements on the output power.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a rotor suspension supporting device for a blood pump.

The purpose of the invention is realized by the following technical scheme: the utility model provides a unsettled strutting arrangement of rotor for blood pump, including the supporting component, spiral case and rotor subassembly that have annular spiral case chamber, spiral case seal installation is on the supporting component, and form the liquid flow cavity between supporting component and the spiral case, the last chamber that holds of having seted up of supporting component, flow the cavity and hold the chamber intercommunication, the second permanent magnetic component of ring taper is installed at rotor subassembly top center, the spiral case that the annular spiral case encloses is the top cap, the inside wall of top cap is provided with the circular cone arch that is used for water conservancy diversion blood, install the first permanent magnetic component of ring taper in the circular cone arch, the rotor subassembly suspends under the magnetic force effect of first permanent magnetic component and second permanent magnetic component and holds the intracavity.

Optionally, a first tapered groove is formed in the outer side wall of the top cover along the direction of the conical protrusion, the first tapered groove and the conical protrusion are coaxially arranged, and the first permanent magnet assembly is installed in the first tapered groove.

Optionally, the first permanent magnet assembly comprises first annular cone magnetic steel and a sealing cover, the first annular cone magnetic steel is installed in the first conical groove in a matched mode, the sealing cover seals the notch of the first conical groove, and the sealing cover tightly supports the first annular cone magnetic steel.

Optionally, a flow channel is axially formed in the rotor housing, the flow channel and the rotor housing are coaxially arranged, a liquid outlet of the flow channel is a conical flared opening, and a second permanent magnet assembly is mounted at a liquid outlet end of the rotor housing.

Optionally, the second permanent magnet assembly comprises second annular conical magnetic steel and a blocking piece, a second conical groove is formed in the liquid outlet end of the rotor shell, a limiting step is formed between the bottom of the second conical groove and the flow channel, the second annular conical magnetic steel is installed on the conical surface of the second conical groove in a matched mode, and the second annular conical magnetic steel is fixed through the blocking piece installed in the second conical groove.

Optionally, the plugging piece is of a revolving body structure, the middle part of the plugging piece is a conical ring, the second annular conical magnetic steel is sleeved on the conical ring, the upper end face of the plugging piece is flush with the upper end face of the rotor shell, and the lower end face of the plugging piece is attached to the limiting step.

Optionally, the upper end of shutoff piece is the last ring of radial evagination, the lower extreme of shutoff piece is the lower ring of axial convexity down, it is connected with the toper ring to go up the ring, and form the angle of bending on the outside of toper ring and between the last ring, form the angle of bending down between the outside of toper ring and the lower ring, the last angle of being close to the toper ring of second annular cone magnet steel is located the angle of bending down, the last lower angle of being close to the toper ring of second annular cone magnet steel is located the angle of bending down, the upper end in second annular groove is circular seal mouth, it fits in circular seal mouth to go up the ring tight.

The invention has the following advantages: according to the rotor suspension supporting device, the second permanent magnet assembly is arranged on the rotor assembly, the first permanent magnet assembly is arranged in the volute, and the rotor assembly can automatically suspend in the accommodating cavity in a centering manner under the magnetic force action of the first permanent magnet assembly and the second permanent magnet assembly, so that the rotor assembly is convenient to install.

Drawings

FIG. 1 is a schematic diagram of a mixed magnetic blood pump;

FIG. 2 is a schematic cross-sectional view of a mixed magnetic blood pump;

FIG. 3 is a schematic view of the installation of the rotor radial adjustment assembly and the rotor axial adjustment assembly;

FIG. 4 is a schematic structural view of the support housing;

FIG. 5 is a schematic view of a rotor radial adjustment assembly;

FIG. 6 is a schematic view of the installation of the first coil;

FIG. 7 illustrates a first schematic view of the rotor assembly;

FIG. 8 is a second schematic structural view of the rotor assembly;

FIG. 9 is a cross-sectional schematic view of the rotor assembly;

FIG. 10 is a schematic view of the open position of the mounting cavity;

FIG. 11 is a schematic structural view of a rotor housing;

FIG. 12 is a schematic view of a structure in which a first magnetic steel is mounted on a cover plate;

FIG. 13 is a schematic view of a rotor core mounted to a cover plate;

FIG. 14 is a schematic view of the construction of the closure;

FIG. 15 is a first schematic structural view of a volute;

FIG. 16 is a second schematic view of the volute;

FIG. 17 isbase:Sub>A cross-sectional view A-A of FIG. 16;

FIG. 18 is an enlarged schematic view at B in FIG. 17;

FIG. 19 is a schematic view of a retaining slot;

in the figure, 11-connecting end cover, 12-volute, 13-conical protrusion, 14-liquid outlet pipe, 15-annular volute cavity, 16-sealing step, 17-baffle ring, 18-backstop slot, 19-first conical groove, 20-first annular conical magnetic steel, 21-sealing cover, 101-rotor shell, 102-first magnetic steel, 103-second magnetic steel, 104-cover plate, 105-rotor core, 106-blade, 107-second annular conical magnetic steel, 108-blocking piece, 109-partition plate, 110-third magnetic steel, 111-second conical groove, 112-inner cylinder, 113-limiting step, 114-limiting cavity, 115-pressure ring, 116-circular blocking port, 117-outer cylinder, 119-convex ring, 120-conical flaring, 121-upper ring, 122-conical ring, 123-lower ring, 201-stator core, 202-first coil, 203-second coil, 204-magnetic pole, 205-first magnetic pole sensor, 100-first rotor block, 301-supporting shell, 302-303-308, 303-lower ring, 201-stator core, 202-first coil, 203-second coil, 204-upper magnetic pole sensor, 205-first magnetic pole sensor, 100-first magnetic block, 301-supporting shell, 302-upper coil, 303-lower magnetic block, and third magnetic block, 201-magnetic block, and 201-lower magnetic block, 1-magnetic circuit board.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention conventionally lay out when in use, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

As shown in fig. 1, a magnetic-mixing blood pump, as shown in fig. 1 and 2, includes a support assembly, a volute 12 having an annular volute cavity 15, a rotor assembly 100, a rotor radial adjustment assembly and a rotor axial adjustment assembly, the volute 12 is hermetically mounted on the support assembly, and a liquid flow cavity is formed between the support assembly and the volute 12, as shown in fig. 3 and 4, a containing cavity 311 is formed on the support assembly, the flow cavity is communicated with the containing cavity 311, as shown in fig. 9 and 10, a second permanent magnet assembly having a cone shape is mounted at the top center of the rotor assembly 100, as shown in fig. 15 and 16, the volute 12 enclosed by the annular volute cavity 15 is a top cover, as shown in fig. 15 and 16, a conical protrusion 13 for guiding blood is provided on the inner side wall of the top cover, as shown in fig. 17, a first permanent magnet assembly having a cone shape is mounted in the conical protrusion 13, the rotor assembly 100 is suspended in the containing cavity 311 under the magnetic force of the first permanent magnet assembly and the second permanent magnet assembly, as the rotor assembly 100 is located outside the rotor assembly 100, and the rotor assembly 100 is capable of suspending the second permanent magnet assembly under the action of preventing the magnetic attraction of the second permanent magnet assembly, and the rotor assembly 100, thereby enabling the rotor assembly to prevent the second rotor assembly from dropping under the action of the second permanent magnet assembly 100.

In this embodiment, along the liquid flowing direction, as shown in fig. 15, the cavity of the annular volute 15 gradually becomes larger, as shown in fig. 16 and 17, a first tapered groove 19 is formed on the outer side wall of the top cover along the direction of the conical protrusion 13, the first tapered groove 19 is coaxially disposed with the conical protrusion 13, as shown in fig. 15 and 18, a baffle ring 17 is further disposed on the inner side wall of the top cover, the conical protrusion 13 is located in the baffle ring 17, and an annular cavity for accommodating the top of the impeller is formed between the baffle ring 17 and the conical protrusion 13, in this embodiment, due to the arrangement of the baffle ring 17, a gap through which blood passes is formed between the baffle ring 17 and the impeller, since the impeller rotates at a high speed in the actual use process, a pressure difference is formed between the annular cavity inside the baffle ring 17 and the annular volute 15 outside the baffle ring 17, that the blood pressure in the annular cavity is greater than the blood pressure in the annular volute 15, the blood pressure in the annular cavity has a boosting effect, and thus the blood pressure of the annular volute is increased and the power of the blood pump, and the power consumption of the blood pump is reduced.

In this embodiment, as shown in fig. 18, the bottom of the baffle ring 17 is an outward-turned part which is turned outward in the radial direction, the turning part of the baffle ring is in arc transition, and the end part of the outward-turned part is a semicircular arc, so that the baffle ring 17 has no dead angle and has a flow guiding function, and further, blood does not die when passing through the baffle ring 17, thereby ensuring the use reliability of the mixed magnetic blood pump.

In this embodiment, as shown in fig. 17 and 18, a connecting end cover 11 is disposed at the bottom of the spiral casing 12, a sinking sealing step 16 is disposed on the connecting end cover 11, when the spiral casing 12 is installed, the connecting end cover 11 is connected with the supporting housing 301 of the supporting assembly by screws, a protruding ring 119 is disposed at the top of the supporting housing 301, after the spiral casing 12 is installed, the protruding ring 119 contacts with the sealing step 16, an annular sealing groove is disposed on an end surface of the protruding ring 119, and an O-ring is disposed in the sealing groove, so that the spiral casing 12 and the supporting housing 301 are hermetically installed, and liquid leakage is avoided.

In this embodiment, as shown in fig. 19, a backstop slot 18 is provided on the liquid outlet pipe 14 of the volute 12, so as to facilitate connection of the liquid outlet pipe 14 with other blood conveying vessels.

In this embodiment, as shown in fig. 2 and 17, the first permanent magnet assembly includes a first annular cone magnetic steel 20 and a sealing cover 21, the first annular cone magnetic steel 20 is installed in the first conical groove 19 in a matching manner, the sealing cover 21 seals the notch of the first conical groove 19, and the sealing cover 21 supports the first annular cone magnetic steel 20 tightly, further, a contact plane is arranged at the top of the first annular cone magnetic steel 20, the bottom of the sealing cover 21 contacts with the contact plane, the notch of the first conical groove 19 extends upwards to form a circular hole, and the sealing cover 21 is circular, preferably, the sealing cover 21 and the circular hole are in close fit, and the maintenance frequency of the magnetic-mixed blood pump is very low, so that the sealing cover 21 and the circular hole can be directly welded.

In this embodiment, as shown in fig. 3, 5 and 6, the rotor radial adjustment assembly includes a stator core 201, a first coil 202 and a second coil 203, the stator core 201 is annular, a raised magnetic pole 204 is disposed on an inner ring of the stator core 201, the magnetic pole 204 is uniformly distributed on the same circumference, the first coil 202 is mounted on the magnetic pole 204, the second coil 203 is wound on an inner side of the stator core 201, the first coil 202 is located between the stator core 201 and the second coil 203, and the rotor assembly 100 rotates under the magnetic force of the second coil 203.

In this embodiment, as shown in fig. 12, the rotor assembly 100 has the first magnetic steels 102 distributed on the same circumference, and the magnetic poles 204 of two adjacent first magnetic steels 102 are opposite, the number of the first coils 202 is a positive integer multiple of the number of the first magnetic steels 102, the inner ring of the stator core 201 is further provided with the first hall sensors 205 for detecting the position of the first magnetic steel 102, further, the first hall sensors 205 are installed in pairs, and the two hall sensors are uniformly distributed on the same circumference, that is, an included angle between the two hall sensors is 180 °, the first hall sensors 205 detect the change of the magnetic force of the first magnetic steel 102 on the first magnetic steel 102, so as to obtain the deflection direction and the deflection amount of the first magnetic steel 102, and further, by changing the magnitude of the magnetic force of the first coil 202, the magnitude and the direction of the magnetic force of the first coil 202 on the rotor assembly 100 are changed, thereby achieving radial adjustment of the rotor assembly 100.

In this embodiment, the number of the first coils 202 is a positive integer multiple of the number of the first magnetic steels 102, if the first magnetic steels 102 are two groups, that is, the number of the first magnetic steels 102 is four, and the number of the first coils 202 is a positive integer multiple of four, if the first coils 202 are four, eight, or twelve, and the first magnetic steels 102 need to correspond to the corresponding first coils 202, because in this embodiment, when the rotor assembly 100 is not skewed, the magnetic force generated by the magnetic field generated by the first coils 202 to the corresponding first magnetic steels 102 is the same as an attractive force or a repulsive force, and because the magnetic poles 204 of the adjacent first magnetic steels 102 are opposite, the first magnetic steels 102 rotate in the circumferential direction, and the position of the first coils 202 is fixed, when the first magnetic steels 102 rotate, the magnetic field direction of the first coils 202 needs to be continuously changed, so that the magnetic force generated by the magnetic field generated by the first coils 202 to the corresponding first magnetic steels 102 is the same as an attractive force or a repulsive force, preferably, the number of the first coils 102 is four, and the magnetic field direction of the first coils 202 is the magnetic force direction of the magnetic force of the corresponding first coils 202 needs to be changed when the rotor assembly 100 rotates for 1000 times, so that the rotor assembly 100 rotates for a rotation is 8000, and the rotor assembly 100, when the rotor assembly 100 rotates, the rotor assembly 100 rotates for which is adjusted for a rotation time, and the rotor assembly 100, so that the rotor assembly 100 rotates for which is adjusted for 1000 times of rotation is adjusted for 1000 times for the rotor assembly 100, and the rotor assembly 100 rotates for which is adjusted for 1000 times for which is adjusted for the rotor assembly 100, and the rotor assembly 100 rotates for which is adjusted for the rotor assembly 100 rotates for the rotor assembly 100.

In this embodiment, as shown in fig. 4, the rotor axial adjustment assembly includes an upper casing 307, a lower casing 308, and a third coil 310, an annular groove is formed on an end surface of the lower casing 308 close to the upper casing 307, the third coil 310 is installed in the annular groove, the upper casing 307 is installed in the support assembly, the lower casing 308 is connected to a bottom of the upper casing 307, a magnetic flux gap 309 is formed between the upper casing 307 and the lower casing 308, the second magnetic steel 103 is installed at a bottom of the rotor assembly 100, the magnetic flux gap 309 is located below the second magnetic steel 103, further, a second hall sensor is installed on the support assembly, preferably, the second hall sensor is installed at a bottom of the groove, the second hall sensor can detect a magnetic force change of the third coil 310, and detect a magnetic force change of the third coil 310, so as to monitor an axial displacement of the rotor assembly 100, and change a magnetic force of the third coil 310, so as to change an axial force of the rotor assembly 100, thereby changing an axial position thereof, and realizing axial adjustment of the rotor assembly 100.

In this embodiment, as shown in fig. 8 and 9, the rotor assembly 100 includes a rotor housing 101, as shown in fig. 10 and 11, a first magnetic steel 102 and a second magnetic steel 103 are installed in the rotor housing 101, and the bottom of the rotor housing 101 is covered with a cover 21 by a cover plate 104, a flow passage is axially formed in the rotor housing 101, the flow passage is coaxially disposed with the rotor housing 101, a liquid outlet of the flow passage is a conical flared opening 120, a second permanent magnetic component is embedded in a liquid outlet end of the rotor housing 101, the second permanent magnetic component is coaxially disposed with the conical flared opening 120, blades 106 uniformly distributed on the same circumference are disposed on the top of the rotor housing 101, the blades 106 form an impeller with the top of the rotor housing 101, the blades 106 are located outside the conical flared opening 120, and the blades 106 are located in the flow chamber, further, the second permanent magnetic component includes a second annular conical magnetic steel 107 and a blocking piece 108, the liquid outlet end of the rotor housing 101 is formed with a second conical groove 111, a limiting step 113 is formed between the groove bottom of the second conical groove 111 and the flow channel, a second annular conical magnetic steel 107 is installed on the conical surface of the second conical groove 111 in a matching manner, and the second annular conical magnetic steel 107 is fixed by a plugging piece 108 installed in the second conical groove 111, as shown in fig. 14, the plugging piece 108 is of a revolving body structure, the middle part of the plugging piece 108 is a conical ring 122, the second annular conical magnetic steel 107 is sleeved on the conical ring 122, the upper end surface of the plugging piece 108 is flush with the upper end surface of the rotor shell 101, the lower end surface of the plugging piece 108 is attached to the limiting step 113, further, the upper end of the plugging piece 108 is an upper annular ring 121 protruding outwards in the radial direction, the lower end of the plugging piece 108 is a lower annular ring 123 protruding downwards in the axial direction, the upper annular ring 121 is connected with the conical ring 122, an upper bending angle is formed between the outer side of the conical ring 122 and the upper annular ring 121, and a lower bending angle is formed between the outer side of the conical ring 122 and the lower annular ring 123, the second annular cone magnet steel 107 is gone up the upper corner that is close to conical ring 122 and is located the angle of bending on, the second annular cone magnet steel 107 is gone up the lower corner that is close to conical ring 122 and is located the angle of bending down, the upper end of second conical groove 111 is circular closing mouth 116, go up ring 121 tight fit in circular closing mouth 116, it is preferred, it is connected for the tight fit with circular closing mouth 116 to go up ring 121, furthermore, because the maintenance frequency of second annular cone magnet steel 107 is lower, therefore second annular cone magnet steel 107 can not the slope dismantle, thereby it can welded connection with circular closing mouth 116 to go up ring 121.

In the embodiment, as shown in the figure, the top of the rotor housing 101 is provided with a convex ring 119, the top of the inner ring of the convex ring 119 is a circular closed opening 116, and the end of the vane 106 is connected with the outer side wall of the convex ring 119.

In this embodiment, as shown in fig. 11, the rotor housing 101 has an outer cylinder 117 and an inner cylinder 112, an inner hole of the inner cylinder 112 is a flow channel, as shown in fig. 10, an installation cavity for installing the first magnetic steel 102 is formed between the outer cylinder 117 and the inner cylinder 112, the cover plate 104 covers the installation cavity with a seal 21, and the inner hole of the cover plate 104 is attached to an outer circle of the inner cylinder 112, as shown in fig. 13, a rotor core 105 is coaxially installed on the cover plate 104, and the bottom of the rotor core 105 is abutted to the cover plate 104, the top of the rotor core 105 is abutted to the bottom of the installation cavity, the cover plate 104 is provided with a partition plate 109 uniformly distributed on the same circumference, the inner side of the partition plate 109 is attached to the outer circle of the rotor core 105, as shown in fig. 13, a limit cavity 114 is formed between two adjacent partition plates 109 and the rotor core 105, as shown in fig. 12, the limit cavity 114 is installed with the first magnetic steel 102, and the magnetic properties of the adjacent magnetic steels are opposite, a second magnetic steel 103 is installed between the rotor core 105 and the cover 104, further, the bottom of the installation cavity is provided with a protruding press ring 115, and the press ring 115 presses the top of the first magnetic steel 102, and the first magnetic seal 102 and the magnetic sensor can not detect the reliability of the hall sensor, and the hall sensor, thereby ensuring that the hall sensor can not detect the hall sensor.

In this embodiment, the top of the cover plate 104 is provided with a sunken step, the top of the rotor core 105 is provided with an upper sunken step, and the second magnetic steel 103 is clamped in the cavity of the upper sunken step and the sunken step, so as to mount the second magnetic steel 103.

In this embodiment, the top of the cover plate 104 is provided with a groove, the groove is internally provided with a third magnetic steel 110, and the third magnetic steel 110 is located below a limiting cavity 114, that is, the third magnetic steel 110 corresponds to a first magnetic steel 102, and the position of the rotor assembly 100 at this time can be determined by detecting the third magnetic steel 110 through the hall sensor, so as to facilitate the radial position adjustment of the rotor assembly 100.

In this embodiment, the supporting assembly includes a supporting housing 301 and an end plate 302, a groove is formed in the supporting housing 301 in a direction toward the volute 12, an annular mounting groove is formed in the bottom of the groove, the annular mounting groove is located outside the accommodating cavity 311, the rotor radial adjusting assembly is mounted in the annular mounting groove, the rotor axial adjusting assembly is mounted at the bottom of the groove, a plurality of protruding columns are disposed at the bottom of the groove, a circuit board assembly for controlling the rotor radial adjusting assembly and the rotor axial adjusting assembly is mounted on the protruding columns, the end plate 302 is mounted at the bottom of the supporting housing 301 in a sealing manner, a flow passage hole is formed at the bottom of the accommodating groove, the flow hole extends in a direction away from the volute 12 to form a liquid inlet pipe 306, the liquid inlet pipe 306 sequentially penetrates through the circuit board assembly and the end plate 302, and the liquid inlet pipe 306 is mounted in a sealing manner, preferably, the circuit board assembly includes two blood pumps, namely an upper circuit board 303 and a lower circuit board 304, wherein the lower circuit board 304 is used for controlling the rotor radial adjusting assembly, and the upper circuit board 303 is used for controlling the rotor axial adjusting assembly, since the volume of the magnetic mixing is smaller, the two circuit boards are controlled separately, thereby facilitating the manufacture of the circuit boards, further, the circuit boards are mounted in a step, the circuit boards 305, and the supporting housing is mounted in a direction, and the two circuit boards are spaced apart by the two circuit boards 301.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.

Claims (7)

1. The utility model provides a unsettled strutting arrangement of rotor for blood pump which characterized in that: the volute is hermetically mounted on the supporting component, a liquid flowing cavity is formed between the supporting component and the volute, a containing cavity is formed in the supporting component and communicated with the flowing cavity, a second permanent magnet component in a cone shape is mounted in the center of the top of the rotor component, the volute surrounded by the annular volute is a top cover, a cone protrusion for guiding blood is arranged on the inner side wall of the top cover, a first permanent magnet component in the cone shape is mounted in the cone protrusion, and the rotor component is suspended in the containing cavity under the magnetic force action of the first permanent magnet component and the second permanent magnet component.

2. The rotor suspension supporting device for the blood pump according to claim 1, characterized in that: a first conical groove is formed in the outer side wall of the top cover along the direction of the conical protrusion, the first conical groove and the conical protrusion are coaxially arranged, and the first permanent magnet assembly is installed in the first conical groove.

3. The rotor suspension supporting device for the blood pump according to claim 2, characterized in that: the first permanent magnet assembly comprises first annular cone magnetic steel and a sealing cover, the first annular cone magnetic steel is installed in the first conical groove in a matched mode, the sealing cover seals a notch of the first conical groove, and the sealing cover enables the first annular cone magnetic steel to be tightly abutted.

4. The rotor suspension supporting device for the blood pump as claimed in claim 3, wherein: the rotor comprises a rotor shell and is characterized in that a runner is axially arranged on the rotor shell, the runner and the rotor shell are coaxially arranged, a liquid outlet of the runner is a conical expanding opening, and the second permanent magnet assembly is mounted at the liquid outlet end of the rotor shell.

5. The rotor suspension supporting device for the blood pump as claimed in any one of claims 1 to 4, wherein: the second permanent magnet assembly comprises second annular cone magnetic steel and a sealing piece, a second taper groove is formed in the liquid outlet end of the rotor shell, a limit step is formed between the groove bottom of the second taper groove and the flow channel, the second annular cone magnetic steel is installed on the conical surface of the second taper groove in a matched mode, and the second annular cone magnetic steel is fixed through the sealing piece in the second taper groove.

6. The rotor suspension supporting device for the blood pump according to claim 5, characterized in that: the plugging piece is of a revolving body structure, the middle part of the plugging piece is a conical ring, the second annular conical magnetic steel sleeve is installed on the conical ring, the upper end face of the plugging piece is flush with the upper end face of the rotor shell, and the lower end face of the plugging piece is attached to the limiting step.

7. The rotor suspension supporting device for the blood pump according to claim 6, characterized in that: the upper end of shutoff piece is the last ring of radial evagination, the lower extreme of shutoff piece is the lower ring of axial convexity down, go up the ring with the toper ring is connected, just the outside of toper ring with go up and form the angle of bending between the ring, the outside of toper ring with form down the angle of bending down between the ring, be close to on the second annular cone magnet steel the angle of bending is located on the upper corner of toper ring, be close to on the second annular cone magnet steel the angle of bending is located down in the angle of bending down in the lower corner of toper ring, the upper end in second annular groove is circular seal mouth, it is in to go up the ring tight fit circular seal is intraoral.

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