AU2021106343A4 - Electromagnetically driven magnetic levitation nutation heart pump and using method thereof - Google Patents
Electromagnetically driven magnetic levitation nutation heart pump and using method thereof Download PDFInfo
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- AU2021106343A4 AU2021106343A4 AU2021106343A AU2021106343A AU2021106343A4 AU 2021106343 A4 AU2021106343 A4 AU 2021106343A4 AU 2021106343 A AU2021106343 A AU 2021106343A AU 2021106343 A AU2021106343 A AU 2021106343A AU 2021106343 A4 AU2021106343 A4 AU 2021106343A4
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- Prior art keywords
- nutation
- pump body
- magnetic
- hemispherical shell
- electromagnetically driven
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/424—Details relating to driving for positive displacement blood pumps
- A61M60/457—Details relating to driving for positive displacement blood pumps the force acting on the blood contacting member being magnetic
- A61M60/462—Electromagnetic force
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/247—Positive displacement blood pumps
- A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/818—Bearings
- A61M60/82—Magnetic bearings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/12—Blood circulatory system
- A61M2210/125—Heart
Abstract
The invention provides an electromagnetically driven magnetic levitation nutation heart
pump and using method thereof, which comprises a pump body with a liquid inlet and a
liquid outlet and a nutation disc arranged in the pump body, wherein the nutation disc
comprises a non-magnetic inner ring and an outer ring magnetic ring which are fixedly
connected; a hemispherical shell magnet is arranged on the upper surface and the lower
surface of the middle part of the non-magnetic inner ring; the upper surface and the lower
surface in the pump body are provided with a hemispherical shell magnetic cover
corresponding to the periphery of the nutation disc hemispherical shell magnet; the
magnetism between the hemispherical shell magnetic cover and the hemispherical shell
magnet is the same, so that the hemispherical shell magnet does not contact with the inner
surface of the pump body, so that the nutation disc is suspended in the fluid chamber in the
pump body; an electromagnetically driven device for driving the hemispherical shell magnet
to deflect is arranged at the upper part of the pump body; a blocking mechanism is arranged
between the liquid inlet and the liquid outlet in the pump body; when the electromagnetically
driven device drives the hemispherical shell magnet to deflect, it will realize the line contact
between the outer ring magnetic ring and the inner surface of the pump body and realize the
separation of the fluid cavity in the pump body into two areas with the blocking mechanism.
The invention has the advantages of simple structure, no friction, no lubrication, low noise,
less heat generation, high energy efficiency ratio and the like, and simultaneously reduces the
probability of hemolysis and thrombus produced by the ventricular auxiliary pump and the
pollution to blood.
1/2
Figures
30
102-
130
210
240 230, 220 40
101 205
120
140 110
103
Figure I
Description
1/2
Figures
30
102- 130
210
240 230, 220 40
101 205
120
140 110
103
Figure I
Electromagnetically driven magnetic levitation nutation heart pump and
using method thereof
The invention relates to an electromagnetically driven magnetic levitation
nutation heart pump and using method thereof.
Heart pump is the key component of ventricular assist device. Common heart
pumps are mainly divided into rotary (vane) type and volumetric type. Rotary pump
relies on the impeller rotating in the housing, and realizes the energy conversion
through the change of hydrodynamic parameters, thus producing continuous flowing
blood. Because the pump rotates at high speed during operation, the blade will
produce great mechanical shear to blood cells, leading to hemolysis and thrombosis.
The volumetric type blood pump does work on liquid by changing its volume, which
increases its energy, and realizes the directional flow of blood through the function of
one-way valve. The biggest disadvantage of volumetric type heart pump is its large
size, difficult implantation, easy infection, and serious thrombosis and hemolysis. For
example, in the Chinese invention patent with the publication number of
CN105477705A, the moving parts need to be directly driven by the motor shaft, and
this kind of contact motion will damage blood cells, and blood is easy to leak from the
motor shaft hole.
The invention improves the above problems, that is, the technical problem to be
solved by the invention is that the existing heart pump has the biggest disadvantages
of large volume, difficult implantation, easy infection, and serious thrombosis and
hemolysis.
The specific embodiment of the invention is as follows: an electromagnetically
driven magnetic levitation nutation heart pump comprises a pump body with a liquid
inlet and a liquid outlet and a nutation disc arranged in the pump body, wherein the
nutation disc comprises a non-magnetic inner ring and an outer ring which are fixedly
connected; a hemispherical shell magnet is arranged on the upper surface and the
lower surface of the middle part of the non-magnetic inner ring; the upper surface and
the lower surface in the pump body are provided with a hemispherical shell magnetic
cover corresponding to the periphery of the nutation disc hemispherical shell magnet;
the magnetism between the hemispherical shell magnetic cover and the hemispherical
shell magnet is the same, so that the hemispherical shell magnet does not contact with
the inner surface of the pump body, so that the nutation disc is suspended in the fluid
chamber in the pump body; an electromagnetically driven device for driving the
hemispherical shell magnet to deflect is arranged at the upper part of the pump body;
a blocking mechanism is arranged between the liquid inlet and the liquid outlet in the
pump body; when the electromagnetically driven device drives the hemispherical
shell magnet to deflect, it will realize the line contact between the outer ring magnetic
ring and the inner surface of the pump body and realize the separation of the fluid
cavity in the pump body into two areas with the blocking mechanism.
Further, the pump body comprises a shell, and upper and lower covers arranged
at the upper and lower ends of the shell, wherein the hemispherical shell magnetic
covers are respectively embedded in the lower surface of the upper cover and the
upper surface of the lower cover, and the opposite faces of the upper and lower covers
is conical surface symmetrically arranged about the outer ring magnetic ring, and the
direction of the conical surface gradually approaches to the outer ring magnetic ring
from the outside of the pump body to the center of the pump body.
Further, the electromagnetically driven device comprises an electromagnet
arranged on the upper surface of the pump body, and the lower end of the
electromagnet generates a magnetic pole opposite to the upper surface of the outer
ring magnetic ring.
Further, the blocking mechanism comprises a chute plate and a partition plate,
wherein the edge of the nutation disc is provided with a notch for the chute plate to
pass through, a pin located in the notch is arranged between two hemispherical shell
magnets of the nutation disc, a chute for making the pin slide in a vertical plane is
provided at one end of the chute plate facing the nutation disc, the partition plate and
the upper and lower ends of the chute plate are fixed to the pump body, and one end
of the partition plate is closely matched with the chute plate and the other end is
embedded.
Further, the number of the magnetic shoes is four.
Further, the upper cover and the lower cover have grooves for accommodating
the chute plate and the partition plate.
Further, the number of electromagnets is the same as that of magnetic shoes and
is correspondingly arranged.
The electromagnetically driven magnetic levitation nutation heart pump is
convenient to use, which is characterized by comprising the electromagnetically
driven magnetic levitation nutation heart pump according to claim 4, which
specifically comprises the following steps:
(1) the electromagnet on the upper part of the pump body is electrified clockwise
or counterclockwise, and when the first electromagnet is electrified, magnetic force is
generated to absorb one end of an outer ring magnetic ring, so that the nutation disc
inclines, and under the action of the electromagnet, the nutation disc is in an inclined state in a liquid chamber and is in line contact with the upper and lower conical surfaces of the liquid chamber, and the cavity is divided into two areas by the contact line, wherein the area connected with a liquid inlet is inlet area, and the area connected with a liquid outlet is outlet area;
(2) after the electromagnets are electrified for one cycle in turn, the nutation disk
also realizes one cycle nutation movement, the electrifying frequency of the
electromagnets determines the movement speed of the nutation disk, and the nutation
disk makes circular swing in the same order as the electrifying sequence of the
electromagnet, thus realizing the input and pumping of liquid.
Compared with the prior art, the heart pump has the following beneficial effects:
the heart pump is driven by electromagnetism, a motor is not needed to drive the
nutation disc, and the driving part is not in contact with the working part; the nutation
disc adopts magnet ball pair to realize complete passive suspension. The heart pump
has the advantages of no friction, no need of lubrication, low noise, less heat and high
energy efficiency ratio, which thoroughly solves the problems of "running, bubbling,
dripping and leaking" of the pump body, reduces the probability of hemolysis and
thrombus produced by the ventricular auxiliary pump and the pollution to blood, and
greatly improves the performance and life of the pump. According to the invention,
electromagnetic force is adopted as the power of the heart pump, so that the pump is
small in volume and compact in structure, and is convenient for surgical
transplantation.
Fig. 1 is a schematic diagram of the exploded structure of the present invention.
Fig. 2 is a longitudinal sectional view of the assembled state of the present
invention.
Fig. 3 is a schematic structural diagram of the flow chamber in the top view of
the present invention.
The present invention will be described in further detail with reference to the
attached drawings and specific embodiments.
As shown in figs. 1-3, an electromagnetically driven magnetic levitation nutation
heart pump comprises a pump body 10 with a liquid inlet 110 and a liquid outlet 120,
and a nutation disc 20 arranged in the pump body 10, wherein the nutation disc 20
comprises a non-magnetic inner ring 210 and an outer ring magnetic ring 240 which
are fixedly connected, an upper hemispherical shell magnet 220 is arranged on the
upper surface of the middle part of the non-magnetic inner ring 210, and a lower
hemispherical shell magnet 230 is arranged on the lower surface of the non-magnetic
inner ring 210; in this embodiment, the pump body 10 includes a shell 101, and an
upper cover 102 and a lower cover 103 disposed at the upper and lower ends of the
shell 101.
The facing surface of the upper cover 102 and the lower cover 103 isa conical
surface symmetrically arranged about the outer ring magnetic ring 220, and the
direction of the conical surfaces gradually approaches to the outer ring magnetic ring
from the outside of the pump body to the center of the pump body; the lower surface
of the upper cover 102 and the upper surface of the lower cover 103 in the pump body
are correspondingly provided with hemispherical shell magnetic covers
corresponding to the upper hemispherical shell magnets 220 and the lower
hemispherical shell magnets 230;the hemispherical shell magnetic covers include an
upper hemispherical shell magnetic cover130 embedded in the lower surface of the
upper cover 102 and a lower hemispherical shell magnetic cover 140 embedded in the upper surface of the lower cover 103; the opposite faces of the hemispherical shell magnetic cover and the corresponding hemispherical shell magnet have the same magnetism, so that the hemispherical shell magnet is not in contact with the inner surface of the pump body, so that the nutating disc is suspended in the fluid chamber in the pump body.
In this embodiment, there is an N pole between the hemispherical shell magnetic
cover and the corresponding hemispherical shell magnet, and the upper hemispherical
shell magnet 220 and the lower hemispherical shell magnet 230 in this embodiment
are composed of four arc-shaped magnetic shoes.
The upper shell 102 of the pump body is provided with an electromagnetically
driven device for driving the magnet of the hemispherical shell to deflect, which
includes an electromagnet 30 on the upper surface of the pump body. In this
embodiment, in order to fix the electromagnet 30 conveniently, the electromagnet 30
is fixed in the upper cover 102. When power is applied, the lower end of the
electromagnet 30 generates a magnetic pole opposite to the upper surface of the outer
ring magnetic ring 240, so that it can absorb a part of the outer ring magnetic ring 240
to deflect and make linear contact with the upper and lower shells of the pump body.
The blocking mechanism positioned between that liquid inlet and the liquid
outlet in the pump body realize the line contact between the outer ring magnetic ring
and the inn surface of the pump body when the electromagnetically driven device
drives the hemispherical shell magnet to deflect, thereby realizing the separation of
the fluid cavity in the pump body with the blocking mechanism to form two areas.
In this embodiment, the blocking mechanism includes a chute plate 40 and a
partition plate 50. The edge of the nutation disc 20 is provided with a notch 250 for
the chute plate 40 to pass through. A pin 260 located in the notch is arranged between the two hemispherical magnets of the nutation disc 20. The chute plate40 facing one end of nutation disc is provided with a chute 40 for the pins to slide in a vertical plane , so that the nutation disc 20 will not deflect during deflection of nutation disc
20. The partition plate 50 and the upper and lower ends of the chute plate are fixed to
the pump body 10; one end of the partition plate 50 is closely matched with the chute
plate, and the other end of the partition plate 50 is embedded in the shell 101. In this
embodiment, the upper cover 102 and the lower cover 103 have grooves for
accommodating the chute plate and the partition plate.
Before working, as shown in fig. 2, the internal section of the pump body 10 is in
a non-working state, and the liquid chamber of the pump body 10 is surrounded by a
part of spherical surface and upper and lower inner conical surfaces. In operation, the
electromagnets 30 are energized according to a certain sequence (clockwise or
counterclockwise). When the first electromagnet is energized, the magnetic force is
generated to attract one end of the outer ring magnetic ring 240, so that the nutation
disc tilts. After the electromagnets are energized for one cycle in turn, the nutation
disc 20 also realizes a periodic nutating movement, and the energizing frequency of
the electromagnets 30 determines the moving speed of the nutation disc. Under the
action of electromagnet, the nutation disc is in an inclined state in the liquid chamber,
and the upper and lower surfaces of the nutation disc are in line contact with the inner
conical surfaces of the upper cover 102 and the lower cover 103 respectively. The
contact line 104 divides the chamber into two areas, the area connected with the liquid
inlet 110 is inlet area 111, and the area connected with the liquid outlet 120 is outlet
area 121.
As shown in fig. 3, when the electrifying sequence of electromagnets is
counterclockwise rotation (in a top view), the nutation disc 20 makes counterclockwise circular swing (the nutation disc 20 does not rotate under the limiting action of the chute plate 40), and the contact line also makes counterclockwise rotation, and the rotating speed of the contact line is equal to the electrifying circulating speed of electromagnets. At this time, the inlet area 111 keeps increasing, forming negative pressure, and the fluid flows in from the inlet, while the outlet area 121 keeps decreasing, pressing the fluid out from the outlet. When the contact line turns to the partition plate, the inlet area 111 reaches its maximum and the outlet area reaches its minimum. The contact line bypasses the partition plate in a short time, changing the original inlet area into an outlet area, and then the inlet area increases from small to large, and the outlet area decreases from large to small, so that the liquid can be input and pumped out.
The heart pump is driven by electromagnetism, which does not need a motor to
drive a nutation disc, and the driving part is not in contact with the working part; The
nutation disc of the working part adopts magnet ball pair to realize complete passive
suspension. It has the advantages of no friction, no need of lubrication, low noise, less
heat and high energy efficiency ratio, which thoroughly solves the problems of
"running, bubbling, dripping and leaking", reduces the probability of hemolysis and
thrombus produced by ventricular auxiliary pump and the pollution to blood, and
greatly improves the performance and life of the pump. According to the invention,
electromagnetic force is adopted as the power of the heart pump, so that the pump is
small in volume and compact in structure, and is convenient for surgical
transplantation.
Meanwhile, if the above-mentioned invention discloses or involves parts or
structural members which are fixedly connected with each other, unless otherwise
stated, the fixed connection can be understood as detachable fixed connection (for example, bolt or screw connection), and can also be understood as non-detachable fixed connection (for example, riveting and welding). Of course, the mutually fixed connection can also be replaced by an integral structure (for example, integrally formed by casting process) (obviously, the integral forming process cannot be adopted)
In addition, unless otherwise stated, the terms used to express the positional
relationship or shape in any of the technical solutions disclosed in the present
invention include the state or shape that is similar, similar or close to it.
Any part provided by the invention can be assembled by a plurality of individual
components or can be an individual part manufactured by an integrated forming
process.
Finally, it should be noted that the above embodiments are only used to illustrate
the technical scheme of the present invention, but not to limit it; although the present
invention has been described in detail with reference to preferred embodiments, those
of ordinary skill in the art should understand that the specific embodiments of the
present invention can still be modified or some technical features can be equivalently
replaced; without departing from the spirit of the technical scheme of the present
invention, it should be covered in the scope of the technical scheme claimed by the
present invention.
Claims (8)
1. An electromagnetically driven magnetic levitation nutation heart pump,
characterized by comprising a pump body with a liquid inlet and a liquid outlet and a
nutation disc arranged in the pump body, wherein the nutation disc comprises a non
magnetic inner ring and an outer ring magnetic ring which are fixedly connected; a
hemispherical shell magnet is arranged on the upper surface and the lower surface of
the middle part of the non-magnetic inner ring; the upper surface and the lower
surface in the pump body are provided with a hemispherical shell magnetic cover
corresponding to the periphery of the nutation disc hemispherical shell magnet; the
magnetism between the hemispherical shell magnetic cover and the hemispherical
shell magnet is the same, so that the hemispherical shell magnet does not contact with
the inner surface of the pump body, so that the nutation disc is suspended in the fluid
chamber in the pump body; an electromagnetically driven device for driving the
hemispherical shell magnet to deflect is arranged at the upper part of the pump body;
a blocking mechanism is arranged between the liquid inlet and the liquid outlet in the
pump body; when the electromagnetically driven device drives the hemispherical
shell magnet to deflect, it will realize the line contact between the outer ring magnetic
ring and the inner surface of the pump body and realize the separation of the fluid
cavity in the pump body into two areas with the blocking mechanism.
2. The electromagnetically driven magnetic levitation nutation heart pump
according to claim 1 is characterized in that the pump body comprises a shell, and
upper and lower covers arranged at the upper and lower ends of the shell, wherein the
hemispherical shell magnetic covers are respectively embedded in the lower surface
of the upper cover and the upper surface of the lower cover, and the opposite faces of
the upper and lower covers is conical surface symmetrically arranged about the outer ring magnetic ring, and the direction of the conical surface gradually approaches to the outer ring magnetic ring from the outside of the pump body to the center of the pump body.
3. The electromagnetically driven magnetic levitation nutation heart pump
according to claim 1 or 2 is characterized in that the electromagnetically driven device
comprises an electromagnet arranged on the upper surface of the pump body, and the
lower end of the electromagnet generates a magnetic pole opposite to the upper
surface of the outer ring magnetic ring.
4. The electromagnetically driven magnetic levitation nutation heart pump
according to claim 3 is characterized in that the blocking mechanism comprises a
chute plate and a partition plate, wherein the edge of the nutation disc is provided with
a notch for the chute plate to pass through, a pin located in the notch is arranged
between two hemispherical shell magnets of the nutation disc, a chute for making the
pin slide in a vertical plane is provided at one end of the chute plate facing the
nutation disc, the partition plate and the upper and lower ends of the chute plate are
fixed to the pump body, and one end of the partition plate is closely matched with the
chute plate and the other end is embedded.
5. The electromagnetically driven magnetic levitation nutation heart pump
according to claim 3 is characterized in that the number of the magnetic shoes is four.
6. The electromagnetically driven magnetic levitation nutation heart pump
according to claim 3 is characterized in that the upper cover and the lower cover have
grooves for accommodating the chute plate and the partition plate.
7. The electromagnetically driven magnetic levitation nutation heart pump
according to claim 1 is characterized in that the hemispherical shell magnet is formed
by splicing a plurality of arc-shaped magnetic shoes.
8. The electromagnetically driven magnetic levitation nutation heart pump is
convenient to use, which is characterized by comprising the electromagnetically
driven magnetic levitation nutation heart pump according to claim 4, which
specifically comprises the following steps:
(1) the electromagnet on the upper part of the pump body is electrified clockwise
or counterclockwise, and when the first electromagnet is electrified, magnetic force is
generated to absorb one end of an outer ring magnetic ring, so that the nutation disc
inclines, and under the action of the electromagnet, the nutation disc is in an inclined
state in a liquid chamber and is in line contact with the upper and lower conical
surfaces of the liquid chamber, and the cavity is divided into two areas by the contact
line, wherein the area connected with a liquid inlet is inlet area, and the area
connected with a liquid outlet is outlet area;
(2) after the electromagnets are electrified for one cycle in turn, the nutation disk
also realizes one cycle nutation movement, the electrifying frequency of the
electromagnets determines the movement speed of the nutation disk, and the nutation
disk makes circular swing in the same order as the electrifying sequence of the
electromagnet, thus realizing the input and pumping of liquid.
Figures
Figure 1 1/2
Figure 3 Figure 2 2/2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021106343A AU2021106343A4 (en) | 2021-08-21 | 2021-08-21 | Electromagnetically driven magnetic levitation nutation heart pump and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021106343A AU2021106343A4 (en) | 2021-08-21 | 2021-08-21 | Electromagnetically driven magnetic levitation nutation heart pump and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021106343A4 true AU2021106343A4 (en) | 2021-11-04 |
Family
ID=78488372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021106343A Active AU2021106343A4 (en) | 2021-08-21 | 2021-08-21 | Electromagnetically driven magnetic levitation nutation heart pump and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021106343A4 (en) |
-
2021
- 2021-08-21 AU AU2021106343A patent/AU2021106343A4/en active Active
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| FGI | Letters patent sealed or granted (innovation patent) |