CN110075377A - Magnetic liquid suspension formula blood pump - Google Patents
Magnetic liquid suspension formula blood pump Download PDFInfo
- Publication number
- CN110075377A CN110075377A CN201910557912.1A CN201910557912A CN110075377A CN 110075377 A CN110075377 A CN 110075377A CN 201910557912 A CN201910557912 A CN 201910557912A CN 110075377 A CN110075377 A CN 110075377A
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- Prior art keywords
- magnetic
- impeller
- magnetic patch
- center column
- assembly
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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
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
-
- 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
- A61M60/205—Non-positive displacement blood pumps
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Mechanical Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- External Artificial Organs (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides a kind of magnetic liquid suspension formula blood pump, by being set to the eccentric force radial compensation of the eccentric force compensation component of center column assembly to the fluid pressure of liquid outlet to impeller assembly, it offsets since radial disbalance power of the outlet higher-pressure region to impeller acts on, the radial limit stability of impeller can be improved, reduce influence of the impeller bias for fluid, the risk that impeller sweeps thorax is reduced, the safety of lifting system ensures the life security of patient.Further, since eccentric force compensation component is set to center column assembly, the configuration state of sprue in pumping will not be had an impact, smaller, hemodynamic stability is influenced on the hydraulic performance of pump, so the blood flow requirements of big flow and high pressure can be reliably provided.
Description
Technical field
The present invention relates to field of surgical, in particular to a kind of magnetic liquid suspension formula blood pump.
Background technique
Human assistance heart pump after decades of development, is beaten from first generation pneumatic type and is pumped, and second generation mechanical bearing is arrived
Formula impeller pump, has evolved to the floated blood pump of the third generation now.
The floated blood pump of the third generation, such as the rotary pump of magnetic liquid mix suspending, wherein impeller in pump in hydraulic bearing and
Suspend ground rotation under the collective effect of magnetic bearing, so that impeller is only contacted with the blood volume in pump, blood can be realized from pump
Import moves to pump discharge.Since entire impeller and the pump housing are without Mechanical Contact, pump, can subtract compared to second generation mechanical bearing formula impeller
Few destruction to blood cell, reduces haemolysis and thrombus occurs.A kind of rotation of magnetic liquid mix suspending is disclosed in the prior art
Formula pump, Fig. 1 show the specific structure of the rotary pump of the magnetic liquid mix suspending.As shown in Figure 1, pump chamber 03 and diffusion part fluid
Connection, to prevent from leading to the position change of impeller radially as blood pressure increases in pump operation process；Upper pump case 01
Diffusion part is limited by a pair of complementary upper and lower half-round 04 and 05 together with lower pump case 02, wherein upper and lower half-round
04 and 05 is respectively formed a part as upper pump case and lower pump case.In this scheme, although taking certain measure to guarantee
The radial limit of rotor in operational process, but in real work, which provides mechanical-assisted circulation for terminal phase patients with heart failure
When, it is in the workload of higher level, often to provide the blood flow of big flow, high pressure.In this way, merely by pump chamber 03
It is not enough to fully achieve impeller radial limit with diffusion part fluid communication, at the pump discharge under the propulsive thrust of blood flow high pressure, leaf
Wheel is easy to produce to the eccentric and radial unstability far from pump discharge side, and once impeller is radial unstability, then will lead to impeller with
Other component grazing gently then causes the mechanical damage of pump, to the damage of blood or causes the unstable of haemodynamics, heavy then make
At shutdown, jeopardize patient vitals.
To solve the problems, such as that above-mentioned impeller is easy eccentric and radial unstability, the Chinese patent Shen of publication number CN102247628A
A kind of embedded type magnetic liquid suspension type centrifugal blood pump please be disclose, Fig. 2 shows the embedded type magnetic liquid suspension type centrifugal blood pumps
Specific structure.As shown in Fig. 2, radial flow path is using hydrodynamic configuration curve 06, the pump of hydrodynamic configuration curve shape in pumping
Radial flow path is the hydrodynamic configuration pumped, and in pump operation, which makes impeller to the hydrodynamic floating power of impeller radial direction
Radial disbalance power is cancelled out each other with radial dynamic pressure suspending power.Impeller is radially being in levitated equilibrium state.The program is in pump internal diameter
The influence of eccentric force is eliminated using hydrodynamic configuration to runner, but the setting of radial flow path changes the structure for pumping interior sprue
State, can seriously affect fluid property, be not able to satisfy and provide the blood flow requirements of big flow and high pressure.
Summary of the invention
The purpose of the present invention is to provide a kind of magnetic liquid suspension formula blood pumps, to solve in existing floated blood pump, it is difficult to
The problem of high-pressure high-flow blood flow is steadily provided.
In order to solve the above technical problems, the present invention provides a kind of magnetic liquid suspension formula blood pumps comprising:
Housing unit has first inner chamber；The housing unit is provided in the axial direction with inlet, radially offers liquid outlet；
The inlet and the liquid outlet are connected to the first inner chamber；
Center column assembly is set to the first inner chamber along the axial restraint of the housing unit；
Impeller assembly is rotatablely arranged at the first inner chamber around the center column assembly；The impeller assembly is configured
To keep suspending relative to the center column assembly and the housing unit in the operating condition；And
Eccentric force compensation component is at least partially arranged at the center column assembly, to compensate the liquid pressure at the liquid outlet
Eccentric force of the power to the impeller assembly.
Optionally, the eccentric force compensation component includes hydrodynamic configuration；The hydrodynamic configuration is set to the newel group
The side towards the liquid outlet of the periphery of part.
Optionally, there is first runner, the first runner has between the center column assembly and the impeller assembly
Opposite first end and second end；The relatively described second end of the first end is further from the inlet, the first runner quilt
It is configured that liquid is flowed into from the first end, and is flowed out by the second end when impeller assembly rotation；The dynamic pressure
Structure expands again the first runner is gradually reduced first to the second end by the first end.
Optionally, have between first between one end and the housing unit far from the inlet of the impeller assembly
Gap, when impeller assembly rotation, liquid flows into described first via first gap from the periphery of the impeller assembly
Runner.
Optionally, the cross section of the hydrodynamic configuration is crescent, and raised towards the direction of the liquid outlet.
Optionally, the eccentric force compensation component includes magnetic variation structure；The magnetic variation structure is configured as: the newel
Magnetic field strength of the periphery of component close to the liquid outlet side is greater than the magnetic field strength far from the liquid outlet side.
Optionally, the impeller assembly includes the first magnetic patch group, and the first magnetic patch group includes multiple first magnetic patch, multiple
First magnetic patch is set to the inner circumferential of the impeller assembly；The center column assembly includes the second magnetic patch group, second magnetic
Block group includes multiple second magnetic patch, and multiple second magnetic patch are set to the periphery of the center column assembly；First magnetic patch
Group is configured as limiting radial displacement of the impeller assembly relative to the center column assembly with the second magnetic patch group；
Wherein, the intensity that magnetizes close to the second magnetic patch of the liquid outlet side is greater than the second magnetic far from the liquid outlet side
The intensity that magnetizes of block, to form the magnetic variation structure.
Optionally, multiple first magnetic patch are uniformly distributed around the inner circumferential of the impeller assembly, and/or, it is multiple described
Second magnetic patch is uniformly distributed around the periphery of the center column assembly.
Optionally, the impeller assembly includes multiple axially disposed tooth platforms, has second between every two tooth platform
Road.
Optionally, the impeller assembly further includes hydraulic bearing, and the hydraulic bearing includes multiple lower pressure surfaces, the pushing
Face is set to each tooth platform close to one end of the inlet；When impeller assembly rotation, the hydraulic bearing quilt
It is configured to generate under the action of liquid and pushes the power of the impeller assembly far from the inlet direction.
Optionally, the impeller assembly includes the first magnetic patch group, is set to the inner circumferential of the impeller assembly；The newel
Component includes the second magnetic patch group, is set to the periphery of the center column assembly；The first magnetic patch group and the second magnetic patch group
It is configured as mutually forming repulsion, to limit radial displacement of the impeller assembly relative to the center column assembly.
Optionally, the first magnetic patch group is identical as the magnetic pole arrangement of the second magnetic patch group.
In conclusion the eccentric force by being set to center column assembly is mended in magnetic liquid suspension formula blood pump provided by the invention
Eccentric force radial compensation of the component to the fluid pressure at liquid outlet to impeller assembly is repaid, is offset since outlet higher-pressure region is to impeller
The effect of radial disbalance power, the radial limit stability of impeller can be improved, reduce influence of the impeller bias for fluid, reduce
Impeller sweeps the risk of thorax, and the safety of lifting system ensures the life security of patient.Further, due to eccentric force compensating
Component is set to center column assembly, will not have an impact to the configuration state of sprue in pumping, on the hydraulic performance of pump influence compared with
It is small, hemodynamic stability, so the blood flow requirements of big flow and high pressure can be reliably provided.
Detailed description of the invention
It will be understood by those skilled in the art that the attached drawing provided is for a better understanding of the present invention, without to this
The range of invention constitutes any restriction.Wherein:
Fig. 1 is a kind of diagrammatic cross-section of the rotary pump of magnetic liquid mix suspending；
Fig. 2 is a kind of flow passage structure schematic diagram of embedded type magnetic liquid suspension type centrifugal blood pump；
Fig. 3 is the perspective view for the magnetic liquid suspension formula blood pump that the embodiment of the present invention one provides；
Fig. 4 is the transverse cross-sectional view for the magnetic liquid suspension formula blood pump that the embodiment of the present invention one provides；
Fig. 5 is the radial cutaway view for the magnetic liquid suspension formula blood pump that the embodiment of the present invention one provides；
Fig. 6 is the schematic diagram of the pump inner flow passage for the magnetic liquid suspension formula blood pump that the embodiment of the present invention one provides；
Fig. 7 is the perspective view for the center column assembly that the embodiment of the present invention one provides；
Fig. 8 is the side view for the center column assembly that the embodiment of the present invention one provides；
Fig. 9 is the schematic diagram for the impeller assembly that the embodiment of the present invention one provides；
Figure 10 is the radial cutaway view of magnetic liquid suspension formula blood pump provided by Embodiment 2 of the present invention.
In attached drawing:
10- housing unit；11- upper housing；12- lower case；13- inlet tube；14- outlet tube；100- first inner chamber；101- feed liquor
Mouthful；102- liquid outlet；103- first runner；The first gap 104-；105- second flow channel；
The center 20- column assembly；21- hydrodynamic configuration；22- the second magnetic patch group；The second magnetic patch of 22a, 22b-；23- newel ontology；
24- seeker；
30- impeller assembly；Pressure surface under 31-；32- the first magnetic patch group；33- tooth platform.
Specific embodiment
To keep the purpose of the present invention, advantages and features clearer, below in conjunction with the drawings and specific embodiments to the present invention
It is described in further detail.It should be noted that attached drawing is all made of very simplified form and is not drawn on scale, only to side
Just, the purpose of the embodiment of the present invention is lucidly aided in illustrating.In addition, the structure that attached drawing is shown is often one of practical structures
Point.Particularly, the emphasis that each attached drawing needs to show is different, uses different ratios sometimes.
As used in this specification and in the appended claims, singular "a", "an" and "the" packet
Plural reference is included, in addition in addition non-content explicitly points out.As used in the specification and the appended claims, term
"or" be usually carried out with including the meaning of "and/or" using, in addition in addition non-content explicitly points out.
Core of the invention thought is to provide a kind of magnetic liquid suspension formula blood pump comprising housing unit, center column assembly,
Impeller assembly and eccentric force compensation component；The housing unit has first inner chamber, and the housing unit is provided in the axial direction with
Inlet radially offers liquid outlet；The inlet and the liquid outlet are connected to the first inner chamber；The center
Column assembly is set to the first inner chamber along the axial restraint of the housing unit；The impeller assembly surrounds the newel group
Part is rotatablely arranged at the first inner chamber, and the impeller assembly is configured as in the operating condition relative to the newel
Component and the housing unit keep suspending；The eccentric force compensation component is at least partially arranged at the center column assembly, uses
To compensate the fluid pressure at the liquid outlet to the eccentric force of the impeller assembly.Configured in this way, by being set to newel group
The eccentric force compensation component of part to the eccentric force radial compensation of impeller assembly, offsets due to outlet the fluid pressure at liquid outlet
Higher-pressure region acts on the radial disbalance power of impeller, and the radial limit stability of impeller can be improved, reduce impeller bias for stream
The influence of body, reduces the risk that impeller sweeps thorax, and the safety of lifting system ensures the life security of patient.Further, by
It is set to center column assembly in eccentric force compensation component, the configuration state of sprue in pumping will not be had an impact, to the water of pump
Power performance influences smaller, hemodynamic stability, so the blood flow requirements of big flow and high pressure can be reliably provided.
It is described below with reference to attached drawing.
[embodiment one]
Fig. 3 is please referred to Fig. 9, wherein Fig. 3 is the perspective view for the magnetic liquid suspension formula blood pump that the embodiment of the present invention one provides, and Fig. 4 is
The transverse cross-sectional view for the magnetic liquid suspension formula blood pump that the embodiment of the present invention one provides, Fig. 5 are the magnetic liquid that the embodiment of the present invention one provides
The radial cutaway view of floated blood pump, Fig. 6 are showing for the pump inner flow passage for the magnetic liquid suspension formula blood pump that the embodiment of the present invention one provides
It is intended to, Fig. 7 is the perspective view for the center column assembly that the embodiment of the present invention one provides, and Fig. 8 is during the embodiment of the present invention one provides
The side view of stem component, Fig. 9 are the schematic diagrames for the impeller assembly that the embodiment of the present invention one provides.
As shown in Figures 3 to 5, the present embodiment one provides a kind of magnetic liquid suspension formula blood pump comprising: housing unit 10, in
Stem component 20, impeller assembly 30 and eccentric force compensation component；The housing unit 10 has first inner chamber 100, the shell
Body component 10 is provided in the axial direction with inlet 101, radially offers liquid outlet 102；The inlet 101 and the liquid outlet
102 are connected to the first inner chamber 100；The center column assembly 20 is set to institute along the axial restraint of the housing unit 10
State first inner chamber 100；The impeller assembly 30 is rotatablely arranged at the first inner chamber around the center column assembly 20
100, the impeller assembly 30 is configured as in the operating condition relative to the center column assembly 20 and the housing unit 10
It keeps suspending；The eccentric force compensation component is at least partially arranged at the center column assembly 20, to compensate the liquid outlet
The eccentric force of fluid pressure at 102 to the impeller assembly 30.
In an exemplary embodiment, housing unit 10 include upper housing 11 and lower case 12, upper housing 11 and under
Shell 12 is to be detachably connected, and can be such as fixedly connected by screw.First inner chamber 100 is formed between upper housing 11 and lower case 12,
First inner chamber 100 is generally circular.Axis outside upper housing 11 along first inner chamber 100 is provided with an inlet tube 13, feed liquor
One end of pipe 13 is connected to first inner chamber 100, and the other end is inlet 101, and blood is flowed by the inlet 101.Newel
Component 20 is fixedly installed on the inside of lower case 12, and center column assembly 20, first inner chamber 100 and 13 three of inlet tube are coaxial
Line.The pivot center of impeller assembly 30 and the axis of center column assembly 20 are also coaxial.The length of impeller assembly 30 in the axial direction is omited
Less than the axial inside dimension of first inner chamber 100 so that impeller assembly 30 can be suspended in the running housing unit 10 without with shell
Body component 10 generates mechanical friction.In the inside of housing unit 10, a liquid outlet 102 is radially offered, to for blood stream
Out.The outside of liquid outlet 102 is provided with outlet tube 14, in order to the flow direction and the other pipelines of connection of guide blood.Impeller assembly
Driving magnetic patch is additionally provided in 30, the electric machine assembly outside housing unit 10 can drive 30 turns of impeller assembly by driving magnetic patch
It is dynamic.Its specific construction can refer to the prior art, and details are not described herein.
Optionally, the impeller assembly 30 includes the first magnetic patch group 32, and the first magnetic patch group 32 is set to the impeller assembly
30 inner circumferential；The center column assembly 20 includes the second magnetic patch group 22, and the second magnetic patch group 22 is set to the center column assembly 20
Periphery；The first magnetic patch group 32 is configured as mutually forming repulsion with the second magnetic patch group 22, to limit the impeller
Radial displacement of the component 30 relative to the center column assembly 20.First magnetic patch group 32 and the second magnetic patch group 22 such as can be magnet ring,
The first magnetic patch group 32 in impeller assembly 30 is dynamic magnet ring, and the second magnetic patch group 22 in center column assembly 1 is magnetostatic ring, moves magnet ring
Repulsion type magnetic bearing is formed with magnetostatic ring, radial support rigidity can be provided for impeller assembly 30 and certain axial support is rigid
Degree.Specifically, as shown in figure 5, radially, the radial repulsion of offer, makes impeller assembly 30 suspend radially between magnetic bearing；
In the axial direction, the axial force that magnetic bearing provides is directed towards (i.e. in the Fig. 5 upwards) in 101 direction of inlet.Configured in this way, at pump
In halted state, when impeller assembly 30 does not rotate, under the action of the first magnetic patch group 32 and the second magnetic patch group 22, impeller assembly 30
Separately and upper housing 11 is posted by with center column assembly 20.Preferably, the first magnetic patch group 32 and the second magnetic patch group
22 magnetic pole arrangement is identical.For example, the first magnetic patch group 32 is the magnet ring along 30 axial charging of impeller assembly, close to inlet
101 one end is the pole N, and one end far from inlet 101 is the pole S；Second magnetic patch group 22 is along 20 axial charging of center column assembly
Magnet ring, close to inlet 101 one end be the pole N, far from inlet 101 one end be the pole S, certain those skilled in the art can
The pole N and the pole S are exchanged as needed, effect is identical.It should be noted that the first magnetic patch group 32 is not limited to a monolith magnetic
Ring is also possible to several magnet rings along the axial arranging of impeller assembly 30, can also be several magnetic patch around impeller assembly 30 it
Axis is circumferentially arranged, and or several magnetic patch around impeller assembly 30 axis be circumferentially arranged and along axial direction of impeller assembly 30 row
Cloth forms magnetic patch array etc..Second magnetic patch group 22 be also similarly, can be there are many arrangement, the present embodiment does not limit this
System.
Preferably, referring to FIG. 9, and combine Fig. 4, impeller assembly 30 include multiple axially disposed tooth platforms 33, every two
There is second flow channel 105 between a tooth platform 33.The impeller assembly 30 further includes hydraulic bearing, and the hydraulic bearing includes multiple
Lower pressure surface 31, the lower pressure surface 31 are set to each tooth platform 33 close to one end of the inlet 101；When the impeller sets
When part 30 rotates, the hydraulic bearing be configured as generating under the action of liquid push the impeller assembly 30 far from it is described into
The power in 101 direction of liquid mouth.Tooth platform 33 such as can be four, and second flow channel 105 is also four, and four tooth platforms 33 surround impeller assembly 30
Axis be uniformly distributed, each tooth platform 33 close to the inlet 101 one end be arranged a lower pressure surface 31.Lower pressure surface 31 is one
Inclined-plane is tilted close to the end face of the inlet 101 towards second flow channel 105 by tooth platform 33, when impeller assembly 30 rotates, blood
Liquid generates the thrust far from 101 direction of inlet to lower pressure surface 31, and the thrust is contrary with the axial force that magnetic bearing provides, and two
Person's balance, can push impeller assembly 30 to be suspended in housing unit 10.As a result, when pump is in operating state, impeller assembly 30
When rotation, under the collective effect of magnetic bearing and hydraulic bearing, impeller assembly 30 can be realized be suspended in housing unit 10 and in
Stem component 20.
Fig. 7 and Fig. 8 are please referred to, and combines Fig. 6, in one example, center column assembly 20 includes cylindrical newel
Ontology 23, seeker 24 and hydrodynamic configuration 21.Newel ontology 23 is fixed on lower case 12 far from one end of inlet 101
(such as can be to snap connection), the other end be fixedly connected with seeker 24 and (can such as be integrally formed), and seeker 24 such as can be
One tip, with smooth curved surfaces, to guide and shunt blood.It the tip of seeker 24 can be by first inner chamber 100
Inlet tube 13 is extended partially into, with the flow direction of preferably guide blood.After blood flows into inlet tube 13 by inlet 101 (in Fig. 6
Direction shown in arrow), under the shunting guidance of seeker 24, blood can change flow direction, and the surrounding along seeker 24 flows, in turn
The second flow channel 105 that blood largely passes through impeller assembly 30 flows out, and is limited by housing unit 10 and is directed to liquid outlet
102, then and flowed out via outlet tube 14.In the present embodiment, the eccentric force compensation component includes hydrodynamic configuration 21；It is described dynamic
Laminated structure 21 is set to the periphery of the center column assembly 20, and towards the side of the liquid outlet 102, (left side is towards going out in such as Fig. 8
Liquid mouth 102).Preferably, the cross section of the hydrodynamic configuration 21 is crescent, 21 protrusion of hydrodynamic configuration.It is furthermore preferred that dynamic
Laminated structure 21 can be integrally formed with newel ontology 23 or by welding, the modes such as be bonded are fixedly connected.
Fig. 6 and Fig. 7 are please referred to, and combines Fig. 4 and Fig. 5, preferably, the center column assembly 20 and the impeller assembly 30
Between have first runner 103, the first runner 103 have opposite first end 103a and second end 103b；Described first
Hold the relatively described second end 103b of 103a further from the inlet 101, the first runner 103 is configured as: when the leaf
When wheel assembly 30 rotates, liquid is flowed into from the first end 103a, and is flowed out by the second end 103b；The hydrodynamic configuration 21
Expand again the first runner 103 is gradually reduced first to the second end 103b by the first end 103a.In practice,
Since impeller assembly 30 is suspended in what center column assembly 20 and housing unit 10 were run, center column assembly 20 and impeller assembly 30
Between have gap (first runner 103), between impeller assembly 30 and lower case 12 also have gap (the first gap 104).Hair
Bright people's discovery, for impeller assembly 30 in rotation, most of blood is as second flow channel 105 is by the discharge pump housing of liquid outlet 102, on a small quantity
Blood can pass through the first gap 104 by the periphery of impeller assembly 30, flow into first runner 103, and then blood by first end 103a
Since the rotation of impeller assembly 30 and pressure difference rotation rise, flows out via second end 103b, converges with the blood in inlet tube 13,
Again by second flow channel 105.In this way, hydrodynamic configuration 21 is set towards the side of the liquid outlet 102 in center column assembly 20,
The hydrodynamic configuration 21 is consistent with the direction of blood flow, has radially by first end 103a(blood inlet side) to second end
103b(blood exit port) first runner 103 gradually restrain the feature of further expansion, blood is entered first-class by first end 103a
Road 103, with the convergence of first runner 103, blood is gradually compressed, formed dynamic pressure (left direction in Fig. 4), offset due to
Impeller eccentric force caused by blood high pressure (right direction in Fig. 4) at liquid outlet 102.In turn, first runner 103 gradually expands,
Reduced pressure zone is formed, depressurizes blood in time, reduces the destruction to blood.
Hydrodynamic configuration 21 is set on center column assembly 20, and the dynamic pressure that blood generates can be offset due to pump discharge high pressure
Lead to impeller eccentric force, so that impeller assembly 30 is kept center, dynamic pressure is with the pressure in blood flow and first runner 103
The change of 30 revolving speed of power and impeller assembly and change, have the function of automatic adjusument, can guarantee impeller assembly 30 always correct
Position, it is eccentric without occurring, so as to the safety of lifting system, ensure the life security of patient.Further, due to dynamic
Laminated structure 21 is set on center column assembly 20, is predominantly located in first runner 103, will not sprue (i.e. second to pump
Runner 105) configuration state have an impact, it is possible to reduce blood streamline, which changes, influences the hydraulic performance of pump, to the waterpower of pump
Performance influences smaller, hemodynamic stability, so the blood flow requirements of big flow and high pressure can be reliably provided.
[embodiment two]
Referring to FIG. 10, it is the radial cutaway view of magnetic liquid suspension formula blood pump provided by Embodiment 2 of the present invention.
The magnetic liquid suspension formula blood pump of the embodiment of the present invention two is basically the same as the first embodiment, and same section is no longer chatted
It states, is described below only for difference.
As shown in Figure 10, in the magnetic liquid suspension formula blood pump that embodiment two provides, the eccentric force compensation component includes magnetic variation
Structure；The magnetic variation structure is configured as: the periphery of the center column assembly 20 is strong close to the magnetic field of 102 side of liquid outlet
Degree is greater than the magnetic field strength far from 102 side of liquid outlet.In example 2, dynamic pressure knot is not provided on center column assembly 20
Structure 21, and as substitution, it is realized using magnetic variation structure and the bias of impeller assembly 30 is corrected.Since pump discharge high pressure is to leaf
The impeller eccentric force of wheel assembly 30 far from 102 direction of liquid outlet, so need one it is additional towards 102 direction of liquid outlet
Active force impeller eccentric force of the pump discharge high pressure to impeller assembly 30 be balanced.Due to the first magnetic of impeller assembly 30
Repulsion is mutually formed between block group 32 and the second magnetic patch group 22 of center column assembly 20, impeller assembly 30 is made to suspend radially,
So can be by increasing the magnetic field strength of close 102 side of liquid outlet of the second magnetic patch group 22 or reducing the second magnetic patch group 22
The magnetic field strength far from 102 side of liquid outlet, form the magnetic deviation between the first magnetic patch group 32 and the second magnetic patch group 22,
The direction (left direction in Figure 10) for the compensation magnetic force that the magnetic deviation is formed is i.e. with pump discharge high pressure to the impeller of impeller assembly 30
Eccentric force it is contrary, the impeller eccentric force as caused by blood high pressure at liquid outlet 102 can be offset (in Figure 10 to the right
To), so that impeller assembly 30 is kept center.Due in the present embodiment two, only to the magnetic force configuring condition of newel component 20
It is improved, the configuration state without changing original blood flow runner will not have an impact the hydraulic performance of pump, blood flow
Mechanics is stablized, so the blood flow requirements of big flow and high pressure can be reliably provided.
Preferably, the first magnetic patch group 32 of the impeller assembly 30 includes multiple first magnetic patch, multiple first magnetic patch
It is set to the inner circumferential of the impeller assembly 30；Second magnetic patch group 22 of the center column assembly 20 include multiple second magnetic patch 22a,
22b, (wherein the second magnetic patch 22a is close to 102 side of liquid outlet, and the second magnetic patch 22b is far from 102 side of liquid outlet) is multiple described
Second magnetic patch is set to the periphery of the center column assembly 20；The first magnetic patch group 32 is configured with the second magnetic patch group 22
To limit radial displacement of the impeller assembly 30 relative to the center column assembly 20；Wherein, close to the liquid outlet 102 1
The intensity that magnetizes of second magnetic patch 22a of side is greater than the intensity that magnetizes of the second magnetic patch 22b far from 101 side of liquid outlet, with
Form the magnetic variation structure.Preferably, multiple first magnetic patch are uniformly distributed around the inner circumferential of the impeller assembly 30, or
Multiple second magnetic patch are uniformly distributed around the periphery of the center column assembly 20, also or the first magnetic patch and the second magnetic patch point
Not Wei Rao impeller assembly 30 be uniformly distributed with center column assembly 20.Optionally, the intensity that magnetizes of multiple first magnetic patch is identical.Due to
The high magnetic patch of the intensity that magnetizes has biggish magnetic field strength, and magnetic field strength of the center column assembly 20 close to pump discharge side is greater than remote
Magnetic field strength from pump discharge side forms the magnetic variation structure.In the present embodiment two, with the second magnetic of the different intensity that magnetize
Block is set to center column assembly 20, is easy to implement manufacture and assembly.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment emphasis is said
Bright is the difference from other embodiments, and the same or similar parts in each embodiment may refer to each other, in addition, respectively
Different parts can also be combined with each other use between a embodiment, and this is not limited by the present invention.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (12)
1. a kind of magnetic liquid suspension formula blood pump characterized by comprising
Housing unit has first inner chamber；The housing unit is provided in the axial direction with inlet, radially offers liquid outlet；
The inlet and the liquid outlet are connected to the first inner chamber；
Center column assembly is set to the first inner chamber along the axial restraint of the housing unit；
Impeller assembly is rotatablely arranged at the first inner chamber around the center column assembly；The impeller assembly is configured
To keep suspending relative to the center column assembly and the housing unit in the operating condition；And
Eccentric force compensation component is at least partially arranged at the center column assembly, to compensate the liquid pressure at the liquid outlet
Eccentric force of the power to the impeller assembly.
2. magnetic liquid suspension formula blood pump according to claim 1, which is characterized in that the eccentric force compensation component includes dynamic pressure
Structure；The hydrodynamic configuration is set to the side towards the liquid outlet of the periphery of the center column assembly.
3. magnetic liquid suspension formula blood pump according to claim 2, which is characterized in that the center column assembly and the impeller sets
There is first runner, the first runner has opposite first end and second end between part；The first end relatively described
Two ends are configured as further from the inlet, the first runner: when impeller assembly rotation, liquid is from described first
End flows into, and is flowed out by the second end；The hydrodynamic configuration is to make the first runner by the first end to described
Two ends are first gradually reduced to be expanded again.
4. magnetic liquid suspension formula blood pump according to claim 3, which is characterized in that the separate feed liquor of the impeller assembly
Mouthful one end and the housing unit between there is the first gap, when impeller assembly rotation, liquid is from the impeller sets
The periphery of part flows into the first runner via first gap.
5. magnetic liquid suspension formula blood pump according to claim 2, which is characterized in that the cross section of the hydrodynamic configuration is crescent moon
Shape, and it is raised towards the direction of the liquid outlet.
6. magnetic liquid suspension formula blood pump according to claim 1, which is characterized in that the eccentric force compensation component includes magnetic variation
Structure；The magnetic variation structure is configured as: magnetic field strength of the periphery of the center column assembly close to the liquid outlet side is big
In the magnetic field strength far from the liquid outlet side.
7. magnetic liquid suspension formula blood pump according to claim 6, which is characterized in that the impeller assembly includes the first magnetic patch
Group, the first magnetic patch group include multiple first magnetic patch, and multiple first magnetic patch are set to the inner circumferential of the impeller assembly；Institute
Stating center column assembly includes the second magnetic patch group, and the second magnetic patch group includes multiple second magnetic patch, and multiple second magnetic patch are set
It is placed in the periphery of the center column assembly；The first magnetic patch group and the second magnetic patch group are configured as limiting the impeller sets
Radial displacement of the part relative to the center column assembly；
Wherein, the intensity that magnetizes close to the second magnetic patch of the liquid outlet side is greater than the second magnetic far from the liquid outlet side
The intensity that magnetizes of block, to form the magnetic variation structure.
8. magnetic liquid suspension formula blood pump according to claim 7, which is characterized in that multiple first magnetic patch surround the leaf
The inner circumferential of wheel assembly is uniformly distributed, and/or, multiple second magnetic patch are uniformly distributed around the periphery of the center column assembly.
9. magnetic liquid suspension formula blood pump according to claim 1, which is characterized in that the impeller assembly includes multiple along axial direction
The tooth platform of setting has second flow channel between every two tooth platform.
10. magnetic liquid suspension formula blood pump according to claim 9, which is characterized in that the impeller assembly further includes hydraulic axis
It holds, the hydraulic bearing includes multiple lower pressure surfaces, and the lower pressure surface is set to each tooth platform close to the one of the inlet
End；When impeller assembly rotation, the hydraulic bearing, which is configured as generating under the action of liquid, pushes the impeller sets
Power of the part far from the inlet direction.
11. magnetic liquid suspension formula blood pump according to claim 1, which is characterized in that the impeller assembly includes the first magnetic patch
Group is set to the inner circumferential of the impeller assembly；The center column assembly includes the second magnetic patch group, is set to the center column assembly
Periphery；The first magnetic patch group and the second magnetic patch group are configured as mutually forming repulsion, to limit the impeller assembly
Radial displacement relative to the center column assembly.
12. magnetic liquid suspension formula blood pump according to claim 11, which is characterized in that the first magnetic patch group and described second
The magnetic pole arrangement of magnetic patch group is identical.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764956.1A CN110464895B (en) | 2019-06-26 | 2019-06-26 | Magnetic liquid suspension type blood pump |
| CN201910557912.1A CN110075377B (en) | 2019-06-26 | 2019-06-26 | Magnetic liquid suspension formula blood pump |
| PCT/CN2020/098313 WO2020259641A1 (en) | 2019-06-26 | 2020-06-26 | Magnetic liquid suspension blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910557912.1A CN110075377B (en) | 2019-06-26 | 2019-06-26 | Magnetic liquid suspension formula blood pump |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910764956.1A Division CN110464895B (en) | 2019-06-26 | 2019-06-26 | Magnetic liquid suspension type blood pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110075377A true CN110075377A (en) | 2019-08-02 |
| CN110075377B CN110075377B (en) | 2019-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910764956.1A Active CN110464895B (en) | 2019-06-26 | 2019-06-26 | Magnetic liquid suspension type blood pump |
| CN201910557912.1A Active CN110075377B (en) | 2019-06-26 | 2019-06-26 | Magnetic liquid suspension formula blood pump |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910764956.1A Active CN110464895B (en) | 2019-06-26 | 2019-06-26 | Magnetic liquid suspension type blood pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN110464895B (en) |
| WO (1) | WO2020259641A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110721357A (en) * | 2019-10-18 | 2020-01-24 | 上海微创医疗器械（集团）有限公司 | Impeller assembly and suspension type blood pump |
| WO2020259641A1 (en) * | 2019-06-26 | 2020-12-30 | 上海微创心力医疗科技有限公司 | Magnetic liquid suspension blood pump |
| WO2024120100A1 (en) * | 2022-12-09 | 2024-06-13 | 深圳核心医疗科技股份有限公司 | Blood pump and ventricular assistance system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516455B (en) * | 2020-11-18 | 2022-11-18 | 深圳核心医疗科技有限公司 | Pump body and ventricular assist system |
| CN112535804A (en) * | 2020-12-03 | 2021-03-23 | 深圳市赛恒尔医疗科技有限公司 | Magnetic suspension blood pump with line contact bearing |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110075377B (en) | 2019-10-08 |
| CN110464895A (en) | 2019-11-19 |
| WO2020259641A1 (en) | 2020-12-30 |
| CN110464895B (en) | 2022-02-22 |
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Effective date of registration: 20200605 Address after: Room 102, Zone C, No. 1601 Zhangdong Road, China (Shanghai) Free Trade Pilot Area, Pudong New Area, Shanghai, 2003 Patentee after: SHANGHAI MICROPORT XINLI MEDICAL TECHNOLOGY Co.,Ltd. Address before: 201203, 1601 Zhangjiang East Road, Zhangjiang hi tech park, Shanghai, Pudong New Area Patentee before: SHANGHAI MICROPORT MEDICAL (GROUP) Co.,Ltd. |