CN101601875A - The blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump - Google Patents
The blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump Download PDFInfo
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- CN101601875A CN101601875A CNA2009100995112A CN200910099511A CN101601875A CN 101601875 A CN101601875 A CN 101601875A CN A2009100995112 A CNA2009100995112 A CN A2009100995112A CN 200910099511 A CN200910099511 A CN 200910099511A CN 101601875 A CN101601875 A CN 101601875A
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Abstract
The invention discloses a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump.The blood passive control suspension bearing of blood pump is a kind of novel blood pump supporting arrangement, annular permanent magnetic steel is installed on the rotor, solenoid is fixed on the stator, stator top and bottom have helicla flute, the stator inner ring has arc groove, end face is installed impeller on the rotor, and impeller is installed in the pump case, and pump case and stator and base link into an integrated entity; Blood flows into from the pump case porch, most of blood flows out from the pump case exit by the rotation of impeller, small part blood is by the intermediary circular hole of rotor, gap between rotor lower surface and the base, the helicla flute of stator bottom, the gap between rotor and the stator, the helicla flute at stator top, form a secondary channels, converge with the blood in exit.The present invention is simple in structure, can guarantee that bearing wear is few, and caloric value is little, and power consumption is little, helps blood pump and develops to lightness, portable direction.
Description
Technical field
The present invention relates to medical apparatus and instruments, particularly relate to a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump.
Background technology
At present, the bearing that is applied in the blood pump mainly contains Mechanical Contact formula bearing and non-contact type bearing two big classes.Mechanical Contact formula bearing exists motor bearings wearing and tearing and frictional heating and the problem of bringing out thrombosis, has seriously restricted the development of blood pump and extensive use clinically thereof.Therefore, non-contact type bearing becomes the research focus of modern blood pump.
Non-contact type bearing divides ACTIVE CONTROL suspension bearing, passive control suspension bearing, hybrid bearing.The ACTIVE CONTROL suspension bearing is mainly magnetic suspension bearing (for example referring to Chinese patent CN200610098332.3), and it at first successfully is applied on the blood pump, and it mainly is that effect by magnetic force is suspended in rotor in the pump.States such as U.S., day, moral take the lead in being engaged in this technical research for many years, still have many technical problems so far, and the equal many places of product are in the trial period.Hybrid bearing technology is also by U.S. Arrow International company and Australian HeartWare company successfully in the application product, and entered clinical experimental stage.
All there is following problem for above-mentioned two kinds of bearing technologies:
(1) Active Magnetic Suspending Bearing needs the more energy input.
(2) in order to make the magnetic suspension bearing function-stable, need high-precision control structure, thereby increased the complexity of The whole control system.
Summary of the invention
The purpose of this invention is to provide a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump, when blood pump was worked, avoid wearing and tearing and frictional heating etc. brought out the factor of thrombosis, and need not complicated control.
In order to achieve the above object, the technical solution used in the present invention is as follows:
The present invention includes pump case and impeller, stator, rotor, base, solenoid and permanent magnetic steel; Have I-shaped through hole in the stator, in the intermediary hole of stator, have the circular groove that five equilibrium distributes, the intermediary hole of stator is embedded in annular magnet coil, the male rotor of outer ring embedding permanent magnetic steel is packed into from below in the stator hole, the rotor bottom surface is positioned at the macropore below the stator, rotor center has circular hole, rotor bottom is flared hole and has equally distributed fan groove, the center is that flaring base is installed in below the rotor, and the stator lower surface is installed on the base, and end face is installed impeller on the rotor, impeller is installed in the pump case, pump case is installed in the stator upper surface, has helicla flute up and down on the stator on hole face and the following hole face, and blood flows into from the pump case porch, most of blood flows out from the pump case exit by the rotation of impeller, small part blood passes through the intermediary rotor inner hole of rotor, the gap between rotor lower surface and the base, the following helicla flute of stator bottom, gap between rotor outer ring and the stator inner ring, the last helicla flute at stator top forms a secondary channels, converges with the blood in exit.
6 equally distributed fan grooves, its fan-shaped angle have been cut in described commentaries on classics bottom
It is 45 ° 60 °; The characteristic angle β of its rotor conical surface is 0.1 ° 0.3 °; The rotor cross section is oval, and its big footpath and path differ 0.1～0.3mm.
Described stator interstitial hole inwall has 3～4 equally distributed circular grooves.
The hole face has helicla flute on the described stator, and the groove number is 20, and the thickness that helicla flute is radially gone up on each all diminishes gradually, and the size of last helicla flute import is than the big 0.2mm of outlet; Last spiral fluted upper surface is the conical surface, and lower surface is the plane, and the angle γ between two faces is 0.1 °～0.3 °.
The hole face has down helicla flute under the described stator, and the groove number is 20, and it is big that the thickness that helicla flute is radially gone up under each all becomes gradually, and the size of following helicla flute outlet is than the big 0.2mm of import; Following spiral fluted lower surface is the conical surface, and upper surface is the plane, and the angle theta between two faces is 0.1 ° 0.3 °.
The angle [alpha] of the described wheel bottom conical surface is 0.1 ° 0.3 °.
The beneficial effect that the present invention has is:
(1) adopts the blood passive control suspension bearing structure, avoided wearing and tearing and frictional heating etc. to bring out the generation of the factor of thrombosis.
(2) adopt the blood passive control suspension bearing structure, can improve the reliability and the impact resistance of blood pump.
(3) because blood passive control suspension bearing is a driven suspension, avoided complicated control system and displacement transducer.
(4) energy expenditure of blood passive control suspension bearing outside is littler than magnetic suspension bearing, thereby effectively reduces the impost of blood pump, helps blood pump and develops to lightness, portable direction.
Description of drawings
Fig. 1 is a structural principle sketch map of the present invention.
Fig. 2 is a secondary channels sketch map of the present invention.
Fig. 3 is the P-P sketch map of Fig. 2.
Fig. 4 rotor structure principle schematic of the present invention.
Fig. 5 is Fig. 4 rotor structure generalized section.
Fig. 6 is stator structure section of the present invention, last helicla flute γ angle and following helicla flute θ angle sketch map.
Fig. 7 is a helicla flute sketch map on Fig. 6 stator.
Fig. 8 is a helicla flute sketch map under Fig. 6 stator.
Fig. 9 is an impeller three dimensional structure sketch map of the present invention.
Figure 10 is Fig. 9 impeller section and α angle sketch map.
Among the figure: 1, pump case, 2, impeller, 2A, the wheel bottom conical surface, 3, stator, 3A, circular groove, 4, rotor, 4A, rotor inner hole, 4B, fan groove, 4C, the rotor conical surface, 4D, rotor cross section, 5, base, 6, solenoid, 7, permanent magnetic steel, 8, pump case outlet, 9, helicla flute down, 10, go up helicla flute, 11, the pump case inlet.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As depicted in figs. 1 and 2, the present invention includes pump case 1 and impeller 2, stator 3, rotor 4, base 5, solenoid 6 and permanent magnetic steel 7; Have I-shaped through hole in the stator 3, in stator 3 intermediary holes, have the circular groove 3A that five equilibrium distributes, stator 3 intermediary holes are embedded in annular magnet coil 6, the male rotor 4 that the outer ring embeds permanent magnetic steel 7 is packed into from below in stator 3 holes, rotor 4 bottom surfaces are positioned at the macropore below the stator 3, rotor 4 centers have circular hole, rotor 4 bottoms are flared hole and have equally distributed fan groove 4B, the center is that flaring base 5 is installed in below the rotor 4, stator 3 lower surfaces are installed on the base 5, end face is installed impeller 2 on the rotor 4, impeller 2 is installed in the pump case 1, pump case 1 is installed in stator 3 upper surfaces, have helicla flute 10 up and down on the stator 4 on hole face and the following hole face, 9, blood enters the mouth from pump case and 11 flows into, most of blood exports 8 outflows by the rotation of impeller 2 from pump case, small part blood is by rotor 4 intermediary rotor inner hole 4A, gap between rotor 4 lower surfaces and the base 5, the following helicla flute 9 of stator 3 bottoms, gap between rotor 4 outer rings and stator 3 inner rings, the last helicla flute 10 at stator top forms a secondary channels, converges with the blood in exit.
As Fig. 3～shown in Figure 5,6 equally distributed fan groove 4B, its fan-shaped angle have been cut in rotor 4 bottoms
It is 45 °～60 °; The characteristic angle β of its rotor conical surface 4C is 0.1 °～0.3 °; Rotor cross section 4D is oval, and its big footpath and path differ 0.1～0.3mm.
As Fig. 6～shown in Figure 8, stator 3 interstitial hole inwalls have 3～4 equally distributed circular groove 3A.
The hole face has helicla flute 10 on the stator 3, and the groove number is 20, and the thickness that helicla flute is radially gone up on each all diminishes gradually, and the size of last helicla flute import is than the big 0.2mm of outlet; Last spiral fluted upper surface is the conical surface, and lower surface is the plane, and the angle γ (shown in Fig. 6 (b)) between two faces is 0.1 ° 0.3 °.
3 times hole faces of stator have down helicla flute 9, and the groove number is 20, and it is big that the thickness that helicla flute is radially gone up under each all becomes gradually, and the size of following helicla flute outlet is than the big 0.2mm of import; Following spiral fluted lower surface is the conical surface, and upper surface is the plane, and the angle theta (shown in Fig. 6 (c)) between two faces is 0.1 °～0.3 °.
As Fig. 9～shown in Figure 10, the angle [alpha] of wheel bottom conical surface 2A (shown in Figure 10 (b)) is 0.1 °～0.3 °.
Operation principle of the present invention is as follows:
Fig. 1, population structure when Fig. 2 has represented that the blood passive control suspension bearing of embodiment of the present invention is applied in the blood pump, when switching in the solenoid 6, impeller 2 can rotate by transfer 4 under the action of alternating magnetic field that alternating current produces together, blood enters the mouth from pump case and 11 flows into, most of blood exports 8 outflows by the rotation of impeller 2 from pump case, small part blood is by rotor 4 intermediary rotor inner hole 4A, gap between rotor 4 lower surfaces and the base 5, the following helicla flute 9 of stator 3 bottoms, gap between rotor 4 outer rings and stator 3 inner rings, the last helicla flute 10 at stator top forms a secondary channels, converges with the blood in exit.Between impeller 2 and last helicla flute 10, can produce the thrust liquid film between rotor conical surface 4C and following helicla flute 9 bottom surfaces, impeller 2 and rotor 4 are played the axial support effect, thereby form axial blood passive control suspension bearing; Between oval cylinder in rotor 4 outer rings and stator 3, can produce radially liquid film, rotor 4 be played the radial support effect, thereby form radially blood passive control suspension bearing.Wherein, the effect of circular groove 3A is: in rotor 4 rotating process, can more help flowing of blood along helicla flute in the circular groove 3A arrival of stator 3 inner rings from following helicla flute 9 effusive blood, thereby reduce haemolysis and blood coagulation; The effect of fan groove 4B is: in the rotation process of rotor 4, more successfully reach helicla flute 9 inlets down under the effect of rotor bottom fan groove 4B, and form high pressure in its porch, thereby promote the circulation of secondary channels blood.
Claims (6)
1, a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump is characterized in that: comprise pump case (1) and impeller (2), stator (3), rotor (4), base (5), solenoid (6) and permanent magnetic steel (7); Stator has I-shaped through hole in (3), in the intermediary hole of stator (3), have the circular groove (3A) that five equilibrium distributes, the intermediary hole of stator (3) is embedded in annular magnet coil (6), the male rotor (4) of outer ring embedding permanent magnetic steel (7) is packed into from below in stator (3) hole, rotor (4) bottom surface is positioned at the macropore below the stator (3), rotor (4) center has circular hole, rotor (4) bottom is for flared hole and have equally distributed fan groove (4B), the center is that flaring base (5) is installed in below the rotor (4), stator (3) lower surface is installed on the base (5), rotor (4) is gone up end face impeller (2) is installed, impeller (2) is installed in the pump case (1), pump case (1) is installed in stator (3) upper surface, stator (4) is gone up and is had helicla flute (10 up and down on hole face and the following hole face, 9), blood flows into from pump case inlet (11), most of blood flows out from pump case outlet (8) by the rotation of impeller (2), small part blood is by the intermediary rotor inner hole of rotor (4) (4A), gap between rotor (4) lower surface and the base (5), the following helicla flute (9) of stator (3) bottom, gap between rotor (4) outer ring and stator (3) inner ring, the last helicla flute (10) at stator top, form a secondary channels, converge with the blood in exit.
2. a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump according to claim 1 is characterized in that: 6 equally distributed fan grooves (4B), its fan-shaped angle have been cut in described rotor (4) bottom
It is 45 °～60 °; The characteristic angle β of its rotor conical surface (4C) is 0.1 °～0.3 °; Rotor cross section (4D) is oval, and its big footpath and path differ 0.1～0.3mm.
3. a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump according to claim 1 is characterized in that: described stator (3) interstitial hole inwall has 3～4 equally distributed circular grooves (3A).
4. a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump according to claim 1, it is characterized in that: described stator (3) is gone up the hole face and is had helicla flute (10), the groove number is 20, the thickness that helicla flute is radially gone up on each all diminishes gradually, and the size of last helicla flute import is than the big 0.2mm of outlet; Last spiral fluted upper surface is the conical surface, and lower surface is the plane, and the angle γ between two faces is 0.1 °～0.3 °.
5. a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump according to claim 1, it is characterized in that: described stator (3) hole face down has down helicla flute (9), the groove number is 20, it is big that the thickness that helicla flute is radially gone up under each all becomes gradually, and the size of following helicla flute outlet is than the big 0.2mm of import; Following spiral fluted lower surface is the conical surface, and upper surface is the plane, and the angle theta between two faces is 0.1 °～0.3 °.
6. a kind of blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump according to claim 1 is characterized in that: the angle [alpha] of the described wheel bottom conical surface (2A) is 0.1 °～0.3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100995112A CN101601875B (en) | 2009-06-11 | 2009-06-11 | Blood passive control suspension bearing applied to implantable centrifugal blood pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100995112A CN101601875B (en) | 2009-06-11 | 2009-06-11 | Blood passive control suspension bearing applied to implantable centrifugal blood pump |
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| CN101601875A true CN101601875A (en) | 2009-12-16 |
| CN101601875B CN101601875B (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100995112A Expired - Fee Related CN101601875B (en) | 2009-06-11 | 2009-06-11 | Blood passive control suspension bearing applied to implantable centrifugal blood pump |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773691B (en) * | 2010-01-26 | 2011-12-07 | 浙江大学 | Suspension permanent magnetic blood pump |
| CN104984425A (en) * | 2015-05-20 | 2015-10-21 | 上海交通大学 | Passive type suspension bearing used for heart blood pump |
| CN105641762A (en) * | 2016-03-14 | 2016-06-08 | 正仁（北京）医疗仪器有限公司 | In-vitro non-implantable maglev heart chamber assisting centrifugal blood pump |
| CN112516454A (en) * | 2020-11-26 | 2021-03-19 | 深圳汉诺医疗科技有限公司 | Magnetic suspension artificial heart pump |
| CN113730793A (en) * | 2021-09-24 | 2021-12-03 | 北京航空航天大学 | Implanted magnetic suspension axial flow blood pump with inlet and outlet guide vanes |
| CN113750364A (en) * | 2021-09-24 | 2021-12-07 | 北京航空航天大学 | Implanted magnetic suspension axial flow blood pump |
| CN114562681A (en) * | 2022-01-25 | 2022-05-31 | 浙江大学 | High-pressure liquid conveying system of arm type centrifugal machine in high centrifugal force environment |
| CN115837118A (en) * | 2022-11-01 | 2023-03-24 | 北京航空航天大学 | Centrifugal blood pump driven by magnetic coupling |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6071093A (en) * | 1996-10-18 | 2000-06-06 | Abiomed, Inc. | Bearingless blood pump and electronic drive system |
| CN100566765C (en) * | 2007-04-25 | 2009-12-09 | 上海大学 | Magnetic suspension manual heart pump |
-
2009
- 2009-06-11 CN CN2009100995112A patent/CN101601875B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773691B (en) * | 2010-01-26 | 2011-12-07 | 浙江大学 | Suspension permanent magnetic blood pump |
| CN104984425A (en) * | 2015-05-20 | 2015-10-21 | 上海交通大学 | Passive type suspension bearing used for heart blood pump |
| CN105641762A (en) * | 2016-03-14 | 2016-06-08 | 正仁（北京）医疗仪器有限公司 | In-vitro non-implantable maglev heart chamber assisting centrifugal blood pump |
| CN112516454A (en) * | 2020-11-26 | 2021-03-19 | 深圳汉诺医疗科技有限公司 | Magnetic suspension artificial heart pump |
| CN112516454B (en) * | 2020-11-26 | 2024-04-09 | 深圳汉诺医疗科技有限公司 | Magnetic suspension artificial heart pump |
| CN113730793A (en) * | 2021-09-24 | 2021-12-03 | 北京航空航天大学 | Implanted magnetic suspension axial flow blood pump with inlet and outlet guide vanes |
| CN113750364A (en) * | 2021-09-24 | 2021-12-07 | 北京航空航天大学 | Implanted magnetic suspension axial flow blood pump |
| CN114562681A (en) * | 2022-01-25 | 2022-05-31 | 浙江大学 | High-pressure liquid conveying system of arm type centrifugal machine in high centrifugal force environment |
| CN114562681B (en) * | 2022-01-25 | 2023-06-16 | 浙江大学 | High-centrifugal force environment high-pressure liquid conveying system of arm type centrifugal machine |
| CN115837118A (en) * | 2022-11-01 | 2023-03-24 | 北京航空航天大学 | Centrifugal blood pump driven by magnetic coupling |
| CN115837118B (en) * | 2022-11-01 | 2023-07-04 | 北京航空航天大学 | Magnetic coupling driven centrifugal blood pump |
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| CN101601875B (en) | 2011-08-31 |
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