CN206285301U - A kind of rotary blood pump - Google Patents
A kind of rotary blood pump Download PDFInfo
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- CN206285301U CN206285301U CN201620443509.8U CN201620443509U CN206285301U CN 206285301 U CN206285301 U CN 206285301U CN 201620443509 U CN201620443509 U CN 201620443509U CN 206285301 U CN206285301 U CN 206285301U
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- blood pump
- permanent magnetic
- magnetic ring
- vane rotor
- permanent
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Abstract
The utility model is related to a kind of rotary blood pump, including is provided with the blood pump of housing, and one end of blood pump is provided with entrance, and the other end of blood pump is provided with outlet section, and cable is connected with blood pump, and the inside of blood pump is provided with vane rotor；Permanent magnetic ring is separately installed with housing and vane rotor, permanent magnetic ring forms radial permanent magnet bearing, and radial permanent magnet bearing provides radial rigidity and by vane rotor radial suspension in equilbrium position.It is maximized favourable factors and minimized unfavourable ones, and can realize the miniaturization of blood pump, blood pump is had the characteristic of integrated level high, small volume, good stability and long service life.
Description
Technical field
The utility model belongs to technical field of medical instruments, is related to a kind of blood pump, more particularly to a kind of human implantable
Rotary blood pump.
Background technology
Heart failure (Heart failure) abbreviation heart failure, it is popular for be that nature heart cannot pump out maintenance whole body
Sanguimotor enough blood flows.Show according to World Health Organization WTO statistics, the people that there are about 15%~20% can be with different degrees of
Heart failure, the number that over-65s are in hospital by heart failure accounts for total number of hospitalized more than 50%, while case fatality rate exceedes after 5 years
50%.For patients with heart failure, only conservative drug treatment, heart transplant and ventricle aid in three kinds of therapy approach.Medicine is controlled
The effect for the treatment of is poor, and heart transplant is extremely difficult because donor is limited, therefore ventricular assist device (Ventricular Assist
Device, VAD) turn into all kinds of whole maximally effective therapy approach of latter stage heart failure that the whole world is generally acknowledged.Ventricular assist device it is main
Part is a blood pump (Blood Pump).Usually the flow ipe of blood pump is connected with human heart left ventricle or right ventricle,
It is connected with sustainer or pulmonary artery by flowing out pipeline, pump is connected with control driver (carrying power supply equipment), by controlling
Blood of the driver control blood pump output with certain pressure (typically in 80~120mmHg) and flow (typically in 2~10L/min)
Liquid, shares power demand of the human normal activity to human heart.The cardiac position aided according to blood pump is divided into left ventricle auxiliary
(LVAD), right ventricle auxiliary (RVAD) and biventricular assist (BiVAD).Blood pump from the pulsation type Pulsating Flow blood pump of earliest period gradually
Transition rotary continuous stream blood pump till now, clinic is entered into American-European countries from laboratory already.First generation pulsation type blood pump
In 1994 BTT bridging therapies (bridge-to-transplant) were carried out via FDA approvals.DeBakey axial-flow
LVAD is first rotary blood pump that clinical trial is carried out in Europe and the U.S., and HeartMate II are first by FDA batches
The mutatis mutandis rotary blood pump in BTT, the approval time is 2008.Common Jarvik2000 and HeartMate II are used
Mechanical bearings, HeartWare uses liquid bearing and Permanent-magnet bearing combined support, HeartMate III and
DuraHeart is supportted for active magnetic over draft.At present, rotary blood pump is generally divided into two critical pieces of housing and vane rotor,
Spring bearing of the vane rotor in housing can be divided into mechanical bearing, actively or passively dynamic pressure liquid bearing, formula magnetic bearing
Several big types；And mechanically bearing operation is stable but is also easy to produce thrombus while can wear and tear；Dynamic pressure liquid bearing must turn
Can just be acted under sub- high speed rotational case, limit blood pump speed adjustable range；Active magnetic bearing is because biography will be introduced
Sensor etc., volume and power consumption are relative to be increased；Passive type magnetic bearing can not realize the stable suspersion of the full free degree, need to be with other shapes
Formula bearing fit is used.For this reason, it may be necessary to a kind of rotary blood pump and its application method, in the presence of it is solved prior art
Mechanical bearing operation is stable but is also easy to produce thrombus while can wear and tear, and dynamic pressure liquid bearing must at a high speed rotate feelings in rotor
Can just be acted under condition, so as to limit blood pump speed adjustable range, active magnetic bearing because to introduce sensor etc., from
And volume and the relative increase of power consumption are caused, passive type magnetic bearing can not realize the stable suspersion of the full free degree, so as to cause to need
The problems such as being used with other forms bearing fit, makes blood pump have that integrated level is high, the characteristic of small volume long lifespan simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of rotary blood pump, solves the mechanical axle in the presence of prior art
Acknowledgement of consignment turns stabilization but is also easy to produce thrombus while can wear and tear, and dynamic pressure liquid bearing must just may be used under rotor high speed rotational case
To act, so as to limit blood pump speed adjustable range, active magnetic bearing because to introduce sensor etc., so that proper
Product and power consumption is relative increases, passive type magnetic bearing can not realize the stable suspersion of the full free degree, so as to cause need to be with other shapes
The problems such as formula bearing fit is used, makes blood pump have that integrated level is high, the characteristic of small volume long lifespan simultaneously.
To achieve the above object, a kind of rotary blood pump of the utility model offer, including the blood pump of housing is provided with, blood pump
One end is provided with entrance, and the other end of blood pump is provided with outlet section, and cable is connected with blood pump, and the inside of blood pump is provided with impeller and turns
Son；Permanent magnetic ring is separately installed with housing and vane rotor, permanent magnetic ring forms radial permanent magnet bearing, and radial permanent magnet bearing is carried
For radial rigidity and by vane rotor radial suspension in equilbrium position.
In above scheme preferably, the first permanent magnetic ring, the second permanent magnetic ring, the 3rd permanent-magnet magnetic are installed in housing
Ring and the 4th permanent magnetic ring；The inside of vane rotor be provided with the 5th permanent magnetic ring, the 6th permanent magnetic ring, the 7th permanent magnetic ring and
8th permanent magnetic ring；First permanent magnetic ring, the second permanent magnetic ring, the 3rd permanent magnetic ring and the 4th permanent magnetic ring, and the 5th forever
Magnetic magnet ring, the 6th permanent magnetic ring, the 7th permanent magnetic ring and the 8th permanent magnetic ring form radial permanent magnet bearing.
It may also be preferred that the 5th permanent magnetic ring, the 6th permanent magnetic ring, the 7th permanent-magnet magnetic that vane rotor inside is installed
Ring and the 8th permanent magnetic ring are provided with axial dipole field, and form certain axial dipole field pretension magnetic force f0, and it is negative that this magnetic force f0 points to Z axis
To.
It may also be preferred that radial permanent magnet bearing forms two pairs of double magnet ring repulsion type bearings, as long as or vane rotor one
The Permanent-magnet bearing at end, or single pair of bearing, or single magnet ring, or the magnet ring of more than three, or repulsive bearing.
It may also be preferred that entrance is provided with one group of flow deflector near porch, the axial direction of flow deflector is set to taper knot
Structure；The close porch of vane rotor is provided with a cone structure, and cone structure is using ceramics, titanium alloy or diamond-like coating
It is made；Flow deflector is set to the structure of lozenges with the contact surface of cone structure.
It may also be preferred that housing is provided with an addendum cone at vane rotor back-end location.
It may also be preferred that housing is provided with one group of taper straightener(stator) blade near vane rotor rear end.
It may also be preferred that the inwall of entrance limits the flow channel to form blood；The inwall of outlet section limits shape
Into the flow pass of blood；Vane rotor is set to the structure that can be rotated in housing, and vane rotor is provided with blood by flowing into
The blade that passage is pumped into and is sent out blood from flow pass by pressure and flow, blade is fixed on vane rotor, and leaf
Wheel rotor rotates together, and blade does not rotate relative to vane rotor.
It may also be preferred that common work of the vane rotor by the magnetic steel of motor in the coil and rotor of setting in housing
With rotary motion is produced, and by the incoming control drive signal of cable.
It may also be preferred that entrance is set to a part for housing；Entrance is set to cylindrical shape；Entrance is not using
Rust steel, the human body compatible material of titanium alloy are made；The diameter of entrance is set to 25mm or 15mm；The porch of entrance is provided with circle
The changeover portion of arc；The outer wall of entrance is using the surface of rough porous or the compatibility surface of suitable cell growth；Outlet section
It is set to a part for housing；Outlet section is connected by external artificial blood vessel with human vas.
Compared with prior art, the utility model has advantages below：
The utility model provides a kind of rotary blood pump, and it can solve the problem that the mechanical bearing in the presence of prior art
Operating stabilization but thrombus is also easy to produce while can wear and tear, dynamic pressure liquid bearing must just can be with rotor high speed rotational case
Act, so as to limit blood pump speed adjustable range, active magnetic bearing because to introduce sensor etc., so that volume
Relative with power consumption to increase, passive type magnetic bearing can not realize the stable suspersion of the full free degree, so as to cause to need and other forms
The problems such as bearing fit is used, it is maximized favourable factors and minimized unfavourable ones, and can realize the miniaturization of blood pump, make blood pump have integrated level high, small volume,
The characteristic of good stability and long service life.
Brief description of the drawings
Fig. 1 is the structural representation of rotary blood pump of the present utility model；
Fig. 2 is the first transversal profile schematic diagram of rotary blood pump of the present utility model；
Fig. 3 is second transversal profile schematic diagram of rotary blood pump of the present utility model；
Fig. 4 is the third transversal profile schematic diagram of rotary blood pump of the present utility model.
In figure, 10 is blood pump, and 12 is entrance, and 14 is outlet section, and 15 is addendum cone, and 17 is taper straightener(stator) blade, and 18 is electricity
Cable, 20 is vane rotor, and 22 is cone structure, and 24 is vane rotor rear end, and 26 is blade, and 30 is coil, and 32 is the first permanent magnetism
Magnet ring, 34 is the second permanent magnetic ring, and 36 is the 3rd permanent magnetic ring, and 38 is the 4th permanent magnetic ring, and 40 is magnetic steel of motor, and 42 is the 5th
Permanent magnetic ring, 44 is the 6th permanent magnetic ring, and 46 is the 7th permanent magnetic ring, and 48 is the 8th permanent magnetic ring, and 50 is flow deflector, and 62 is stream
Enter passage, 64 is flow pass,
Specific embodiment
In order to more fully understand the utility model, the utility model is explained in detail with reference to specific embodiment.
It is clear that it is new without departing from this practicality of appended claims with retrofiting that different modifications can be carried out to the utility model
Type broader spirit and scope.Therefore, following examples have the exemplary implication without limitation.
Embodiment:
A kind of rotary blood pump, including the blood pump 10 of housing is provided with, one end of blood pump 10 is provided with entrance 12, blood pump 10
The other end is provided with outlet section 14, and cable 18 is connected with blood pump 10, and the inside of blood pump 10 is provided with vane rotor 20.
In the above-described embodiments, entrance 12 is columnar structure, is a part for housing, can use stainless steel, titanium
The compatibility material of the human implantables such as alloy is made；Entrance 12 will insert the human body apex of the heart, collect the blood in ventricle, and its is straight
Footpath can be different according to adult, children and baby is applied to, such as a kind of size for adult can be diameter
25mm；The porch of entrance 12 is set to circular arc transition, so as to avoid injury of myocardium, the outer wall of entrance 12 during the insertion apex of the heart
It is set to be adapted to the compatibility surface of cell growth, for example, can is a kind of titanium alloy surface of rough porous.
In the above-described embodiments, outlet section 14 is also a part for housing, other classes such as external artificial blood vessel of outlet section 14
It is connected on human vas like attachment means.
In the above-described embodiments, the inwall of entrance 12 limits the flow channel 62 to form blood；The inwall of outlet section 64
Restriction forms the flow pass 64 of blood.
In the above-described embodiments, vane rotor 20 is can be rotated in housing, and vane rotor 20 is provided with blade 26, leaf
By flow channel 62 can be pumped into blood and be sent blood from flow pass 64 with certain pressure and flow by the rotation of piece 26
Go out.
In the above-described embodiments, the rotary motion of vane rotor 20 is the motor magnetic in coil 30 and the rotor in housing
Produced under the collective effect of steel 40, control drive signal is incoming by cable 18；The rotating speed of vane rotor 20 can be larger
In the range of adjust, with the patient demand for exporting different flow pressures so as to adapt to different.
In the above-described embodiments, the first permanent magnetic ring 32, the second permanent magnetic ring 34, the 3rd permanent magnetic ring are installed in housing
36th, the 4th permanent magnetic ring 38；The inside of vane rotor 20 is equipped with the 5th permanent magnetic ring 42, the 6th permanent magnetic ring 44, the 7th permanent magnetism
Magnet ring 46, the 8th permanent magnetic ring 48；Arrow on Fig. 1 middle magnetic rings shows magnetic line of force direction；This several groups of magnet rings form a kind of footpath
To Permanent-magnet bearing, using the teaching of the invention it is possible to provide larger radial rigidity with by the radial suspension of vane rotor 20 in equilbrium position.As shown in figure 1,
Magnet ring in vane rotor 20 has certain axial dipole field with the magnet ring in housing, so as to form certain axial dipole field pretension magnetic
Power f0, this magnetic force f0 point to Z axis negative sense.
A kind of preferred radial permanent magnet bearing situation is show but in Fig. 1, is two pairs of double magnet ring repulsion type bearings；Also may be used
Using the radial permanent magnet bearing of other manner, such as can be single pair of (as long as Permanent-magnet bearing of vane rotor one end), can be with
Be single magnet ring or more magnet rings, can be repulsive, and the above various combining forms.
In the above-described embodiments, entrance 12 is provided with one group of flow deflector 50 near porch, and its axial direction is a kind of taper knot
Structure.
In the above-described embodiments, the close intake section of vane rotor 20 is a cone structure 22, and its material can be
High-abrasive material such as ceramics, titanium alloy, diamond-like coating or other wear-resisting and PHYSIOLOGICALLY COMPATIBLE materials or coating.
In the above-described embodiments, because the radial permanent magnet bearing for biasing generates axial pretightning force f0, so initial shape
Vane rotor 20 is pressed on flow deflector 50 by cone structure 22 during state, and the axial direction of such vane rotor 20 is mainly pre-
The lower balance of elastic reactance effect produced at clamp force f0 and pyramidal structure；The radial direction of vane rotor 20 is mainly in above-mentioned footpath
To the lower balance of the radial permanent magnet power effect of Permanent-magnet bearing；Vane rotor 20 balances position shown in the figure.
When vane rotor 20 is impacted under inactive state, particularly axial impact when, for example vane rotor 20 to Z just
To skew, as long as ensure design, when the apexes contact of vane rotor rear end 24 is to inner walls, its radial permanent magnet bearing is produced
Axialy offset force direction be still towards Z axis negative sense, then after external impact is eliminated, vane rotor 20 can be inclined in permanent magnetism
Put and return to initial position in the presence of power, simultaneously because the characteristic of taper can be with automatic centering.
Can also as shown in figure 3, set up an addendum cone 15 at the vane rotor rear end 24 in housing, during original state with
24 do not contact, between have certain interval, only when vane rotor 20 be subject to greater impact to Z axis forward migration when just connect
Touch, stop the continuation skew of vane rotor 20.
Can also be as shown in figure 4, increasing by one group of cone similar to flow deflector 50 at vane rotor rear end 24 in housing
Shape straightener(stator) blade 17, does not contact during original state with vane rotor rear end 24, between have certain interval, only when vane rotor 20
Just come in contact during by greater impact to Z axis forward migration, stop the continuation skew of vane rotor 20, now after vane rotor
The summit at end 24 is with inner walls without coming in contact.
After being rotated when vane rotor 20 works, because the pressure at flow pass 64 is higher than at flow channel 62
Pressure, then blood pressure difference will produce towards Z axis negative sense thrust, axial rigidity ratio during the rotation of such vane rotor 20
It is big when not working, more stablize.
(typically more than the several years) after work really long days, the contact surface of flow deflector 50 and cone structure 22 occurs one
Fixed abrasion, but the characteristics of due to cone structure 22 and axial pre tightening force f0 presence, vane rotor 20 and flow deflector 50
Between can automatic pretension, so avoid many two ends all needs to increase lacking for elastic pretension element using mechanical bearing blood pump
Point, reduces failure risk.
Fig. 2 is the cross-section structure of entrance 12, and flow deflector 50 is one group of guide vane, and Fig. 2 only represents a kind of form, water conservancy diversion
Blade quantity can be two, three, the fourth class it is multiple, but guide vane does not constitute full circle.
One effect of flow deflector 50 is to carry out rectification to the blood for flowing into, and another effect is that vane rotor 20 is carried out
Support；The purpose that the contact jaw of guide vane does not constitute full circle is common mechanical formula bearing to be avoided easily thrombosed shortcoming,
Even if forming certain haemocyte accumulation on cone structure 22 and the contact surface of flow deflector 50, but with rotation, contact surface becomes
Noncontact face, the cell of accumulation will be washed away by the blood in the noncontact face of flowing through, therefore, it is difficult to form continuous circle thrombus.
In addition can be with as shown in Fig. 2 the contact surface of flow deflector 50 and cone structure 22 can be analogous to the knot of lozenges
Structure, i.e., form dynamic pressure liquid buoyancy at contact surface when the rotational speed is high, and the contact for reducing between the two even suspends, such good
Although being contacted between flow deflector 50 and cone structure 22 when place is low speed, rubbed during low speed small, be lost also small；Work as rotating speed
When higher, due to the presence of liquid buoyancy, contact between the two reduces on the contrary, therefore can reduce abrasion.
Claims (10)
1. a kind of rotary blood pump, including the blood pump (10) for being provided with housing, it is characterised in that：One end of blood pump (10) is provided with entrance
Section (12), the other end of blood pump (10) is provided with outlet section (14), is connected with cable (18) on blood pump (10), blood pump (10) it is interior
Portion is provided with vane rotor (20)；Permanent magnetic ring is separately installed with housing and vane rotor (20), permanent magnetic ring is formed radially forever
Magnetic bearing, radial permanent magnet bearing provides radial rigidity and by vane rotor (20) radial suspension in equilbrium position.
2. rotary blood pump as claimed in claim 1, it is characterised in that：First permanent magnetic ring (32), are installed in housing
Two permanent magnetic rings (34), the 3rd permanent magnetic ring (36) and the 4th permanent magnetic ring (38)；The inside of vane rotor (20) is provided with
Five permanent magnetic rings (42), the 6th permanent magnetic ring (44), the 7th permanent magnetic ring (46) and the 8th permanent magnetic ring (48)；First permanent-magnet magnetic
Ring (32), the second permanent magnetic ring (34), the 3rd permanent magnetic ring (36) and the 4th permanent magnetic ring (38), and the 5th permanent magnetic ring
(42), the 6th permanent magnetic ring (44), the 7th permanent magnetic ring (46) and the 8th permanent magnetic ring (48) form radial permanent magnet bearing.
3. rotary blood pump as claimed in claim 2, it is characterised in that：The 5th permanent-magnet magnetic installed inside vane rotor (20)
Ring (42), the 6th permanent magnetic ring (44), the 7th permanent magnetic ring (46) and the 8th permanent magnetic ring (48) are provided with axial dipole field, and are formed
Certain axial dipole field pretension magnetic force f0, this magnetic force f0 points to Z axis negative sense.
4. rotary blood pump as claimed in claim 1, it is characterised in that：Radial permanent magnet bearing forms two pairs of double magnet ring repulsion types
Bearing, as long as or vane rotor one end Permanent-magnet bearing, or single pair of bearing, or single magnet ring, or the magnet ring of more than three, or attracting
Profile shaft holds.
5. rotary blood pump as claimed in claim 1, it is characterised in that：Entrance (12) is provided with one group of water conservancy diversion near porch
Piece (50), the axial direction of flow deflector (50) is set to pyramidal structure；The close porch of vane rotor (20) is provided with a cone structure
(22), cone structure (22) is made of ceramics, titanium alloy or diamond-like coating；Flow deflector (50) and cone structure (22)
Contact surface is set to the structure of lozenges.
6. rotary blood pump as claimed in claim 5, it is characterised in that：Housing sets at vane rotor rear end (24) position
There is an addendum cone (15).
7. rotary blood pump as claimed in claim 5, it is characterised in that：Housing is provided with one near vane rotor rear end (24) place
Group taper straightener(stator) blade (17).
8. the rotary blood pump as any one of claim 1-7, it is characterised in that：The inwall of entrance (12) limits shape
Into the flow channel (62) of blood；The inwall of outlet section (14) limits the flow pass (64) to form blood；Vane rotor (20)
The structure that can be rotated in housing is set to, vane rotor (20) is provided with and blood is pumped into by flow channel (62) and leads to blood
The blade (26) that excess pressure and flow are sent out from flow pass (64), blade (26) is fixed on vane rotor (20), and impeller
Rotor (20) rotates together, and blade (26) does not rotate relative to vane rotor (20).
9. rotary blood pump as claimed in claim 8, it is characterised in that：The coil that vane rotor (20) passes through setting in housing
(30) collective effect of the magnetic steel of motor (40) and in rotor produces rotary motion, and drives letter by the incoming control of cable (18)
Number.
10. the rotary blood pump as any one of claim 1-7, it is characterised in that：Entrance (12) is set to housing
A part；Entrance (12) is set to cylindrical shape；Entrance (12) is made of the human body compatible material of stainless steel, titanium alloy；
The diameter of entrance (12) is set to 25mm or 15mm；The porch of entrance (12) is provided with the changeover portion of circular arc；Entrance
(12) outer wall is using the surface of rough porous or the compatibility surface of suitable cell growth；Outlet section (14) is set to housing
A part；Outlet section (14) is connected by external artificial blood vessel with human vas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620443509.8U CN206285301U (en) | 2016-05-16 | 2016-05-16 | A kind of rotary blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620443509.8U CN206285301U (en) | 2016-05-16 | 2016-05-16 | A kind of rotary blood pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206285301U true CN206285301U (en) | 2017-06-30 |
Family
ID=59093893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620443509.8U Active CN206285301U (en) | 2016-05-16 | 2016-05-16 | A kind of rotary blood pump |
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| CN (1) | CN206285301U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107137796A (en) * | 2016-05-16 | 2017-09-08 | 北京精密机电控制设备研究所 | A kind of rotary blood pump |
| CN109420207A (en) * | 2017-08-29 | 2019-03-05 | 航天泰心科技有限公司 | Blood pump device |
-
2016
- 2016-05-16 CN CN201620443509.8U patent/CN206285301U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107137796A (en) * | 2016-05-16 | 2017-09-08 | 北京精密机电控制设备研究所 | A kind of rotary blood pump |
| CN109420207A (en) * | 2017-08-29 | 2019-03-05 | 航天泰心科技有限公司 | Blood pump device |
| WO2019041394A1 (en) * | 2017-08-29 | 2019-03-07 | 航天泰心科技有限公司 | Blood pumping device |
| US11471664B2 (en) | 2017-08-29 | 2022-10-18 | Rocketheart Technology Co. Ltd | Blood pump device |
| CN109420207B (en) * | 2017-08-29 | 2024-02-20 | 航天泰心科技有限公司 | Blood pump device |
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Effective date of registration: 20191230 Address after: 300457 workshop b3-04, b3-05 and b3-06, No. 17, No. 80, Haiyun street, Binhai New Area, Tianjin Patentee after: Aerospace Tai Xin Technology Co., Ltd. Address before: 100076 Beijing City, Fengtai District Dahongmen South East Highland Road No. 1 Patentee before: Beijing Research Institute of Precise Mechatronic Controls |