CN205964586U - Centrifugal impeller is used to blood pump - Google Patents
Centrifugal impeller is used to blood pump Download PDFInfo
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- CN205964586U CN205964586U CN201620424222.0U CN201620424222U CN205964586U CN 205964586 U CN205964586 U CN 205964586U CN 201620424222 U CN201620424222 U CN 201620424222U CN 205964586 U CN205964586 U CN 205964586U
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Abstract
The utility model discloses a centrifugal impeller is used to blood pump belongs to the electric motor rotor field, and centrifugal impeller is used to blood pump includes the bottom plate, fixes a plurality of blades on the bottom plate, be located inside rotor magnet steel, axial dynamic pressure structure and the radial dynamic pressure structure of blade, the rotor magnet steel is used for the radial magnetic suspension and the axial magnetic suspension of centrifugation impeller, axial dynamic pressure structure is used for the axial dynamic pressure liquid suspension of centrifugation impeller, radial dynamic pressure structure is used for the radial dynamic pressure liquid suspension of centrifugation impeller, axial dynamic pressure structure is located on the upper surface of blade, the bottom plate middle part is equipped with the through -hole, radial dynamic pressure structure is located on the inner wall of through -hole. The utility model discloses a centrifugal impeller is used to blood pump is in the axial with radially all set up the suspension of magnetic suspension and dynamic pressure liquid for the centrifugation impeller is behind skew balancing seat, and the balancing seat is arrived in answer that can be rapid.
Description
Technical field
This utility model is related to rotor field, more particularly, to a kind of blood pump centrifugal impeller.
Background technology
Blood pump, is particularly applied to the blood pump in human assistance heart, generally have requirement small volume, highly integrated degree with
And the features such as high-accuracy property, these features make blood pump be not suitable for there is axle centrifugal impeller using mechanical type, and this is due to mechanical type
Axle centrifugal impeller is had to have bearing and pivot structure although bearing and pivot structure are so that centrifugal impeller axially and radially has
Higher reliability and stability, but the presence of bearing and pivot structure not only can increase volume and the component count of blood pump,
And bearing and pivot structure invade the generation not being easily caused thrombosis and haemolysises in blood, increase patient health risk.Cause
This, use shaftless centrifugal impeller blood pump more a few days ago, and because shaftless centrifugal impeller eliminates bearing and pivot structure, but this makes
Shaftless centrifugal impeller becomes very difficult being axially and radially respectively provided with higher stability.
Chinese patent literature CN1821582A discloses a kind of shaftless unshrouded impeller being suitable to micropump, and this impeller includes one
Group blade and the support of fixing blade, the pressure face of described blade is 5 °～20 ° with horizontal plane angle, and blade upper end is in circle
The conical surface, 40 °～60 ° of cone angle；Projected area on plane graph for the blade and the ratio 0.4～0.8 of the impeller outer diameter area of a circle；Blade
Inlet angle and 45 °～50 ° of the angle of outlet.This patent is provided with the pressure face horizontal by certain angle, has certain moving
Pressure acts on, but is difficult to so that impeller is axially and radially all reaching relatively stable dynamic balancing, and the ability resisting impulsive force is weak, leaf
Wheel returns to the limited in one's ability of equilbrium position in rotary course.
Utility model content
In order to overcome the defect of prior art, technical problem to be solved in the utility model is that proposing a kind of blood pump uses
Centrifugal impeller, suspends so that centrifugal impeller is after deviateing equilbrium position being axially and radially provided with magnetic suspension and dynamic pressure liquid,
Rapidly equilbrium position can be returned to, this guarantees and preferable axiality in centrifugal impeller rotary course, can be kept, improve
The reliability and stability of blood pump.
For reaching this purpose, this utility model employs the following technical solutions：
This utility model provides a kind of blood pump centrifugal impeller, including base plate, the multiple leaves being fixed on described base plate
Piece, the rotor magnetic steel being located at described blade interior, axial hydrodynamic structure and radial dynamic pressure structure, described rotor magnetic steel is used for institute
State axial magnetic and the axial magnetic suspension of centrifugal impeller, described axial hydrodynamic structure is used for the axial hydrodynamic of described centrifugal impeller
Liquid suspends, and the radial dynamic pressure liquid that described radial dynamic pressure structure is used for described centrifugal impeller suspends, and described axial hydrodynamic structure is located at
The upper surface of described blade, is provided with through hole in the middle part of described base plate, described radial dynamic pressure structure is located on the inwall of described through hole.
In this utility model preferably technical scheme, described axial hydrodynamic structure includes the dynamic pressure groove that depth gradually changes
Road and the relief for reducing fluid pressure, described relief is located at the end of described dynamic pressure conduit.
In this utility model preferably technical scheme, described dynamic pressure conduit includes groove bottom and is fixed on described groove bottom
The interior current limiting plate of both sides and outer current limiting plate.
In this utility model preferably technical scheme, described blade is configured to wedge shape column structure, described dynamic pressure groove
Road is configured to arc dynamic pressure conduit, and the groove entrance of described arc dynamic pressure conduit is located at the wide end of described wedge shape column structure, institute
The groove outlet stating arc dynamic pressure conduit is located at the narrow end of described wedge shape column structure, from the groove entrance of described arc dynamic pressure conduit
Groove to described arc dynamic pressure conduit exports, and the depth of described arc dynamic pressure conduit gradually becomes shallower as, and width becomes narrow gradually.
In this utility model preferably technical scheme, described radial dynamic pressure liquid suspends and is configured to single-wire helix shape or many
Line spiral helicine dynamic pressure groove.
In this utility model preferably technical scheme, described through hole is set on for carrying out to the rotation of described centrifugal impeller
On spacing axis body, and the inner surface of described through hole is not contacted with the outer surface of described axis body.
When described centrifugal impeller is offseted to one side by impact, the described dynamic pressure of described axis body and described axis body side
Gap between groove can diminish, and the gap between described axis body and the described dynamic pressure groove of described axis body opposite side can become big,
The fluid pressure making the little side in gap becomes big, and the fluid pressure of the big side in gap diminishes, and produces restoring force, and restoring force orders about
Described centrifugal impeller returns to former equilbrium position.
In this utility model preferably technical scheme, between multiple described blades, it is provided with fluid passage, adjacent two
The direction of described fluid passage is mutually perpendicular to.
In this utility model preferably technical scheme, the pipes' analysis of described fluid passage are inclined-plane, near described logical
Arrive away from described through hole at hole, the depth of described fluid passage becomes larger.
In this utility model preferably technical scheme, the edge of described blade and/described fluid passage is provided with
Chamfering.
In this utility model preferably technical scheme, the outer surface of described base plate and described blade be provided with TiN and/
DLC protective layer.
The beneficial effects of the utility model are：The blood pump centrifugal impeller that this utility model provides, is provided with rotor magnetic steel,
Rotor magnetic steel is by the attraction with its periphery and upper and lower sides so that centrifugal impeller realizes relatively stable magnetcisuspension radial and axial
Floating, it is provided with axial hydrodynamic structure so that centrifugal impeller is axially realizing relatively stable dynamic pressure liquid suspension, be provided with radial direction magnetic
Suspend so that centrifugal impeller realizes relatively stable dynamic pressure liquid suspension in radial direction.As can be seen here, centrifugal impeller is axially and radially
All achieve relatively stable dynamic balancing, after centrifugal impeller deviates former equilbrium position, can rapidly return to equilbrium position, energy
Effectively improve stability and the reliability of blood pump.It is provided with fluid passage, the court of adjacent two fluid passages between multiple blades
To being mutually perpendicular to, on the one hand, this structure easy making process, it is suitable to mass production；On the other hand, this structure is due to blade
Shape matching rule it is easy to the larger rotor magnetic steel of installation volume, beneficial to the whole work efficiency improving motor.
Brief description
Fig. 1 is the structural representation of the blood pump centrifugal impeller that this utility model specific embodiment provides.
In figure：1st, base plate；2nd, blade；3rd, axial hydrodynamic structure；4th, radial dynamic pressure structure；11st, through hole；32nd, relief；
311st, groove bottom；312nd, interior current limiting plate；313rd, outer current limiting plate；5th, groove outlet；6th, groove entrance；7th, fluid passage；71st, pipes' analysis.
Specific embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by specific embodiment.
As shown in figure 1, a kind of blood pump centrifugal impeller providing in the present embodiment, blood pump centrifugal impeller is in blood pump
The axis body periphery of heart position, and do not contact with axis body, and around axis body rotation.Blood pump centrifugal impeller includes base plate 1, multiple
Blade 2, rotor magnetic steel, axial hydrodynamic structure 3 and radial dynamic pressure structure 4.Multiple blades 2 are fixed on base plate 1, the present embodiment
The quantity of Leaf 2 is preferably four, four blade 2 circular array distributions, and the cross section of four blades 2 is rough wedge.
Rotor magnetic steel is located in base plate 1 posterior dorsal, and the groove at embedded blade 2 back, and rotor magnetic steel is used for the radial direction magnetic of centrifugal impeller
Suspend and axial magnetic suspension, specifically, in radial directions, rotor magnetic steel is mutually exclusive in radial direction with the magnet steel within axis body,
Form stable axial magnetic, in the axial direction, rotor magnetic steel is attracted each other with the magnet steel within blood pump stator and axis body,
Form stable axial magnetic suspension.Axial hydrodynamic structure 3 is located at the upper surface of blade 2, when blood stream is through axial hydrodynamic configuration 3
Can be compressed, and can be rubbed with the outer surface of axial hydrodynamic structure 3, the blood being compressed can be produced counteracting force, friction
During also can produce frictional force, counteracting force and frictional force all can produce axial force, thus realizing stable axial hydrodynamic liquid
Suspend.Radial dynamic pressure structure 4 is located on the inwall of through hole 11 at base plate 1 middle part, when centrifugal impeller offsets to certain side, can compress
The blood of this side, the blood being compressed, in the presence of radial dynamic pressure structure 4, produces the counteracting force of radial direction, thus realizing steady
Fixed radial dynamic pressure liquid suspends.Therefore, centrifugal impeller is in axial magnetic power, axial magnetic suspension power, axial hydrodynamic liquid suspending power
And achieve axially and radially equal dynamic balancing in the presence of radial dynamic pressure liquid suspending power and self gravitation, and when centrifugation leaf
After wheel deviates former equilbrium position, can rapidly be returned to equilbrium position.
Further, axial hydrodynamic structure 3 includes dynamic pressure conduit and relief 32, and the depth and width of dynamic pressure conduit are gradually
Change is so that blood is compressed after flowing through dynamic pressure groove road.Relief 32 is used for reducing fluid pressure, and its shape is rough wedge,
Relief 32 is located at the end of dynamic pressure conduit, and blood flows to relief 32 after the outflow of dynamic pressure groove road again, namely relief 32
Downstream in dynamic pressure conduit.Because relief 32 is located at the end high level of dynamic pressure conduit, therefore it is to the flow direction of blood and flow
There is certain restriction effect, ensure that the foreseeable reduction of pressure of blood, so that the shearing stress of blood and haemolysis are existing
As being preferably minimized.In addition, relief 32 is conducive to for blood being limited to secondary runner the blood weight so that flowing out from secondary runner
Newly enter in the fluid passage 7 closed on.
The rough wedge column of blade 2, dynamic pressure conduit is arc dynamic pressure conduit, in order to blood is limited to dynamic pressure conduit
Interior, it is further preferred that dynamic pressure conduit includes groove bottom 311 and is fixed on the interior current limiting plate 312 of groove bottom 311 both sides and outer limit
Stream plate 313, interior current limiting plate 312 and outer current limiting plate 313 can be prevented effectively from the blood leakage flowing through from dynamic pressure groove road.Arc dynamic pressure
The groove entrance 6 of conduit is located at the wide end of wedge shape column structure, and the groove outlet 5 of arc dynamic pressure conduit is located at wedge shape column structure
Narrow end, from the groove entrance 6 of arc dynamic pressure conduit to arc dynamic pressure conduit groove outlet 5, the depth of arc dynamic pressure conduit is gradually
Shoal, width becomes narrow gradually, therefore arc dynamic pressure conduit is the arc skewed slot that a width gradually diminishes, in centrifugal impeller side
Stator outer surface or pump case inner surface and arc skewed slot collective effect under, blood can be pressed when flowing through this arc skewed slot
Contracting, between groove bottom 311 and stator outer surface or pump case inner surface, the thickness of fluid layer is fluid viscosity, wheel speed and axle
The function of body geometry, in this function, fluid viscosity increases, and the thickness of fluid layer increases；The increase of wheel speed, stream
The thickness of body layer also increases, and the thickness that this allows for fluid layer can change with the conversion of fluid viscosity and/wheel speed.
In order to strengthen the effect of radial dynamic pressure liquid suspension, radial dynamic pressure liquid suspends and is configured to single-wire helix shape or multi-thread spiral shell
The dynamic pressure groove of rotation shape, the dynamic pressure groove of alternatively camber line, parabola or other shapes certainly, single-wire helix shape or many
Line helical form can be Left-hand threads or right-hand thread, but would generally elect right-hand thread as according to the steering of motor.Dynamic pressure groove
The flow flowing through liquid from through hole 11 can be increased.Through hole 11 is set on axis body, and the inner surface of through hole 11 and axis body is outer
Surface does not contact, the gap when centrifugal impeller is offseted to one side by impact, between the dynamic pressure groove of axis body and axis body side
Can diminish, the gap between the dynamic pressure groove of axis body and axis body opposite side can become big so that the fluid pressure of the little side in gap becomes
Greatly, and the fluid pressure of the big side in gap diminishes, produce restoring force, restoring force orders about described centrifugal impeller and return to former balance position
Put.Additionally, the quantity of dynamic pressure groove is preferably 4～6.
So that blade 2 is processed convenient, further, between multiple blades 2, it is provided with fluid passage 7, adjacent
The direction of two fluid passages 7 is mutually perpendicular to, and this orthogonal set-up mode makes two sides of blade 2 all very
Smooth, manufacturing procedure is greatly reduced, and is suitable for producing in enormous quantities.In addition, being easy to lay volume larger inside the blade 2 of regular shape
Rotor magnetic steel, and the larger magnet steel of this volume is conducive to improving the whole work efficiency of motor.The pipes' analysis 71 of fluid passage 7
For inclined-plane, near through hole 11 at away from through hole 11, the depth of fluid passage 7 becomes larger, and this structure makes from stream
The blood that body passage 7 flows out gradually becomes to relax.
So that the edge of blade 2 and/fluid passage 7 is more smooth, the edge of blade 2 and/fluid passage 7 is equal
It is provided with chamfering, advantageously reduces the abrasion of blood, reduce the destruction to blood.
In order to strengthen the compatibility of blood and material, base plate 1 is provided with TiN and/DLC protective layer with the outer surface of blade 2,
TiN and/DLC protective layer have the features such as blood compatibility is good, hardness is high and smooth, can reduce blood and base plate 1, blade 2
Between occur severe friction.
This utility model is described with reference to the preferred embodiments, and those skilled in the art know, without departing from this reality
In the case of new spirit and scope, various changes or equivalence replacement can be carried out to these features and embodiment.This reality
It is not limited to the particular embodiment disclosed with new, other embodiments falling in claims hereof all belong to
Scope in this utility model protection.
Claims (10)
1. a kind of blood pump centrifugal impeller, including base plate (1), multiple blades (2) of being fixed on described base plate (1), Yi Jiwei
In the internal rotor magnetic steel of described blade (2), described rotor magnetic steel is used for axial magnetic and the axial magnetic of described centrifugal impeller
Suspend it is characterised in that：
Also include axial hydrodynamic structure (3) and radial dynamic pressure structure (4)；
The axial hydrodynamic liquid that described axial hydrodynamic structure (3) is used for described centrifugal impeller suspends, and described radial dynamic pressure structure (4) is used
Radial dynamic pressure liquid in described centrifugal impeller suspends；
Described axial hydrodynamic structure (3) is located at the upper surface of described blade (2)；
It is provided with through hole (11), described radial dynamic pressure structure (4) is located on the inwall of described through hole (11) in the middle part of described base plate (1).
2. blood pump centrifugal impeller according to claim 1 it is characterised in that：
Described axial hydrodynamic structure (3) includes the dynamic pressure conduit that depth gradually changes；With
For reducing the relief (32) of fluid pressure；
Described relief (32) is located at the end of described dynamic pressure conduit.
3. blood pump centrifugal impeller according to claim 2 it is characterised in that：
Described dynamic pressure conduit includes groove bottom (311)；With
It is fixed on interior current limiting plate (312) and the outer current limiting plate (313) of described groove bottom (311) both sides.
4. the blood pump centrifugal impeller according to Claims 2 or 3 it is characterised in that：
Described blade (2) is configured to wedge shape column structure；
Described dynamic pressure conduit is configured to arc dynamic pressure conduit；
The groove entrance (6) of described arc dynamic pressure conduit is located at the wide end of described wedge shape column structure；
Groove outlet (5) of described arc dynamic pressure conduit is located at the narrow end of described wedge shape column structure；
From groove outlet (5) to described arc dynamic pressure conduit for the groove entrance (6) of described arc dynamic pressure conduit, described arc dynamic pressure groove
The depth in road gradually becomes shallower as, and width becomes narrow gradually.
5. blood pump centrifugal impeller according to claim 1 it is characterised in that：
Described radial dynamic pressure structure (4) is configured to single-wire helix shape or multi-thread spiral helicine dynamic pressure groove.
6. blood pump centrifugal impeller according to claim 5 it is characterised in that：
Described through hole (11) is set on and carries out spacing axis body for rotating to described centrifugal impeller, and described through hole (11)
Inner surface is not contacted with the outer surface of described axis body；
When described centrifugal impeller is offseted to one side by impact, the described dynamic pressure groove of described axis body and described axis body side it
Between gap can diminish, the gap between described axis body and the described dynamic pressure groove of described axis body opposite side can become big so that
The fluid pressure of the little side of gap becomes big, and the fluid pressure of the big side in gap diminishes, and produces restoring force, restoring force order about described from
Lobus cardiacus wheel returns to Yuanping City weighing apparatus position.
7. blood pump centrifugal impeller according to claim 1 it is characterised in that：
It is provided with fluid passage (7) between multiple described blades (2)；
The direction of two adjacent described fluid passages (7) is mutually perpendicular to.
8. blood pump centrifugal impeller according to claim 7 it is characterised in that：
The pipes' analysis (71) of described fluid passage (7) are inclined-plane；
To away from described through hole (11) place near described through hole (11), the depth of described fluid passage (7) becomes larger.
9. the blood pump centrifugal impeller according to claim 7 or 8 it is characterised in that：
The edge of described blade (2) and/described fluid passage (7) is provided with chamfering.
10. the blood pump centrifugal impeller according to claim 7 or 8 it is characterised in that：
Described base plate (1) is provided with TiN and/DLC protective layer with the outer surface of described blade (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620424222.0U CN205964586U (en) | 2016-05-11 | 2016-05-11 | Centrifugal impeller is used to blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620424222.0U CN205964586U (en) | 2016-05-11 | 2016-05-11 | Centrifugal impeller is used to blood pump |
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| Publication Number | Publication Date |
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| CN205964586U true CN205964586U (en) | 2017-02-22 |
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| CN201620424222.0U Active CN205964586U (en) | 2016-05-11 | 2016-05-11 | Centrifugal impeller is used to blood pump |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833368A (en) * | 2016-05-11 | 2016-08-10 | 北京精密机电控制设备研究所 | Centrifugal impeller for blood pump |
| WO2019041394A1 (en) * | 2017-08-29 | 2019-03-07 | 航天泰心科技有限公司 | Blood pumping device |
| 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 |
| CN115337534A (en) * | 2022-09-30 | 2022-11-15 | 重庆凯磁智能科技研究院有限公司 | Magnetic suspension supercharging device for blood pump |
-
2016
- 2016-05-11 CN CN201620424222.0U patent/CN205964586U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833368A (en) * | 2016-05-11 | 2016-08-10 | 北京精密机电控制设备研究所 | Centrifugal impeller for blood pump |
| 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 |
| 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 |
| CN115337534A (en) * | 2022-09-30 | 2022-11-15 | 重庆凯磁智能科技研究院有限公司 | Magnetic suspension supercharging device for blood pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
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 |
|
| TR01 | Transfer of patent right |