CN204219479U - A kind of magnetic liquid suspension formula axial-flow pump heart-assist device - Google Patents
A kind of magnetic liquid suspension formula axial-flow pump heart-assist device Download PDFInfo
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- CN204219479U CN204219479U CN201420558846.2U CN201420558846U CN204219479U CN 204219479 U CN204219479 U CN 204219479U CN 201420558846 U CN201420558846 U CN 201420558846U CN 204219479 U CN204219479 U CN 204219479U
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- impeller
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- pump
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Abstract
This utility model relates to a kind of heart-assist device, a kind of magnetic liquid suspension formula axial-flow pump heart-assist device of implant into body of biomedical engineering field specifically, it is characterized in that: this section of runner is divided into inside and outside two runners by the outer shroud being wrapped in impeller blade stage casing, ring outer wall is carved with spiral groove, groove roof is skewed, and what make outer flow passage meets head piece greatly, goes out head piece little, pressure effect of surging is subject to, by " radial suspension " during vane rotary; The sidewall of groove has one opening; Inlay a pair " convex-recessed magnetic cone " in impeller hub rear end and rear guide vane wheel hub, the two be axial magnetic to, heteropole is attracting, to impeller generation pulling force backward, to resist the blood forward thrust that rotary blade is subject to, add the restraining forces of stator core, impeller is by " axial suspension state ", and therefore impeller " is suspended " entirely; Impeller and forward and backward stator wheel hub inlay two respectively to " sliding bearing ", and it protects magnetic cone, blade and pump line inwall, locates, has helped impeller suspended.
Description
Technical field
This utility model relates to a kind of heart-assist device, specifically a kind of magnetic liquid suspension formula axial-flow pump heart-assist device of implant into body of biomedical engineering field.
Background technology
Heart disease is first killer of the mankind, and various heart disease develops into the blood-pumping function that certain phase all can have influence on heart, causes " heart failure ".Treating serious heart failure is a clinical medical difficult problem at present, and help with artificial mechanical blood pump or replace the heart of exhaustion to be the most effective Therapeutic Method of one, this mechanical blood pump is commonly referred to " heart-assist device " or " artificial heart "." heart-assist device " that current American-European countries has several performance good gets permission clinical practice, and the axial-flow pump heart-assist device application of the implantable that wherein volume is little at most.Axial-flow pump is divided into again " having axle axial-flow pump " and " suspension axial-flow pump ".Find in clinical practice: " having axle axial-flow pump " easily causes mechanical breakdown because of bearing high-speed resistance, and bearing friction can produce ill effects such as " mechanical hemolysis due and thrombosis "; " suspension axial-flow pump " is " active magnetic axial-flow pump " substantially, although this pump does not have mechanical friction and fault, its complex structure, blood flow dead angle is many, and thrombosis problem is serious, and volume is large, and impact is implanted.
As can be seen here, reduce the volume of pump, the bearings system adopted, improve stability and the working life of pump, reduce blood flow and wash away dead angle, reducing the complication such as haemolysis and thrombosis, is the target of axial-flow pump technological improvement.
Summary of the invention
The purpose of this utility model is to provide a kind of magnetic liquid suspension formula axial-flow pump heart-assist device that can reduce complication, life-span length, implanted.
This utility model is made up of " pump-machine integrated device " pump and drive motors two Iarge-scale system, it is characterized in that: impeller has an outer shroud, outer shroud is wrapped in the stage casing of impeller blade, and this section of runner is divided into inside and outside two runners, i.e. sprue and branch flow passage; The outer wall of outer shroud is carved with spiral groove, and groove roof is skewed, and what make branch flow passage meets head piece greatly, goes out head piece little; The sidewall of groove has one opening, and the blood of inner flow passage can enter outer flow passage from here because being subject to centrifugal effect, is outer flow passage fluid replacement; A plush copper magnetic cone is inlayed in impeller hub rear end, inlay the magnetic that one one is recess in rear guide vane wheel hub to bore, two magnetic cone be axial magnetic to, and opposite pole is relative, the two attracts each other, axis pulling force is backward produced to impeller, can resist, balance blood to above-mentioned " the front permanent-magnet suspension bearing " of the axially thrust forward of rotary blade than " rear permanent-magnet suspension bearing " quality and magnetic force all large, be convenient to the blood forward thrust resisted and balance rotary blade is subject to, make impeller suspended.
Above-mentioned impeller hub front port inlays a convex axle of pottery, and pilot blade wheel hub port inlays a gem recess, and " convex axle-recess " matched in clearance becomes a pair " front slide bearing "; Impeller hub rear port inlays a ceramic dished cover, and rear guide vane wheel hub port inlays a recessed lid of gem, and " dished cover-recessed lid " matched in clearance becomes a pair " rear sliding bearing ".
Above-mentioned rotor magnetic steel is Nd-Fe-Bo permanent magnet material, and magnetic is to being radial direction.
Rotor magnetic steel in above-mentioned impeller hub and plush copper magnetic have the magnetic shield circle of a soft magnetism iron ring between boring.
The caliber of above-mentioned pump line back segment is fairshaped gradual change reducing.
This utility model has the following advantages compared with prior art:
Although this utility model structure is simple, rotary blade can passive " hydraulic radial suspension " and " axial permanent magnetic suspension " reposefully, and mechanical friction is little, extends the life-span of bearing and pump, reduces the complication such as mechanical hemolysis due and thrombosis simultaneously; And because structure is simple, the reliability and stability of pump is good, and pump volume is little, easily implants; Interior external shunt, blood flow is more smooth, improves efficiency.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, this utility model is further illustrated.
Fig. 1 is structure sectional view of the present utility model.
Fig. 2 is impeller and rear guide vane schematic perspective view.
Fig. 3 is the A-A sectional view of Fig. 2.
In figure: 1. impeller, 2. impeller blade, 3. impeller hub, 4. rotor magnetic steel, 5. outer shroud, 6. groove roof, 7. groove sidewall opening, 8. ceramic convex axle, 9. gem recess, 10. pilot blade, 11. pilot blade wheel hubs, 12. magnetic shield circles, 13. plush copper magnetic cones, 14. ceramic dished covers, the recessed lid of 15. gem, 16. recess magnetic cones, 17. rear guide vanes, 18. rear guide vane wheel hubs, 19. inner flow passages, 20. outer flow passages, 21. meet head piece, 22. go out head piece, 23. pump line inwalls, 24. direction of rotation, 25. pump lines, 26. pump cases, 27. stator cores, 28. coil windings, 29. pump intakes, 30. pump discharges.
Detailed description of the invention
This utility model is made up of " pump-machine integrated device " pump and drive motors two Iarge-scale system, pumping system primarily of pump line 25, pilot blade 10, rear guide vane 17, two to built-in sliding bearing, impeller 1, drive motors system forms primarily of rotor magnetic steel 4, stator core 27, coil windings 28, motor pump case 26, the rotor magnetic steel 4 of drive motors system is built in the impeller hub 3 of pumping system, and impeller has an outer shroud 5, outer shroud 5 is wrapped in the stage casing of impeller blade 2, and this section of runner is divided into inner flow passage 19, outer flow passage 20, and the former is sprue, and the latter is branch flow passage, the outer wall of outer shroud 5 is carved with spiral groove, groove roof 6 is in skewed, make branch flow passage to meet head piece 21 large, go out head piece 22 little, blood enters osculum from great Kou and goes out, because blood is incompressible fluid, it receives extruding, therefore pressure of surging uniformly is produced to the outer wall of outer shroud 5, make the impeller of outer shroud 5 and parcel thereof by " radial suspension ", the sidewall of groove has one opening, for groove sidewall opening 7, impeller rotates according to direction of rotation 24, and the blood of inner flow passage is subject to centrifugal action, can enter by opening part, for outer flow passage fluid replacement, so both make outer flow passage hydraulic pressure larger, evenly, make again the lectin from hemolymph of inside and outside diverting flow obtain more smooth, not easily form thrombosis, the efficiency of pump is higher, a plush copper magnetic cone 13 is inlayed in the rear end of impeller hub 3, the recess magnetic cone 16 that one one is recess is inlayed in rear guide vane wheel hub 18, two magnetic cone be axial magnetic to, and opposite pole is relative, the two attracts each other, axis pulling force is backward produced to impeller 1, can resist, balance blood is to the axial thrust forward of rotary blade, add the axial two-way restraining forces forward and backward of stator core to impeller, therefore pump is in certain operating rotational speed range, impeller 1 is in " axial suspension state " substantially, namely the impeller 1 of normal work " is suspended " entirely.
The front port of above-mentioned impeller hub 3 inlays a convex axle 8 of pottery, and the port of pilot blade wheel hub 11 inlays a gem recess 9, and " convex axle-recess " matched in clearance becomes a pair " front slide bearing "; The rear port of impeller hub 3 inlays a ceramic dished cover 14, the port of rear guide vane wheel hub 18 inlays a recessed lid 15 of gem, " dished cover-recessed lid " matched in clearance becomes a pair " rear sliding bearing ", and it protects magnetic cone, and making it can not direct friction and being corroded; Two can locate impeller 1 to " sliding bearing ", obtain it and enter more reposefully " suspended state ", and therefore protect impeller blade 2 and pump line inwall 23, and making it can not phase mutual friction and collision; Two to " sliding bearing " self having " sliding friction " just when pump startup and speed change, and when impeller 1 suspends, " sliding friction " will from being relieved to disappearance.
Above-mentioned rotor magnetic steel 4 is Nd-Fe-Bo permanent magnet material, and magnetic is to being radial direction.
Radial magnetic in above-mentioned impeller hub 3 to rotor magnetic steel 4 and axial magnetic to plush copper magnetic bore the magnetic shield circle 12 having a soft magnet between 13, for shielding magnetic interference therebetween.
The caliber of above-mentioned pump line 25 back segment is fairshaped gradual change reducing, is conducive to pump supercharging and raises the efficiency.
The connected mode that axial-flow pump is implanted in Patients with Cardiac Failure body is: pump intake 29 inserts the apex otch of heart by bridge piece, and pump discharge 30 is bridged to aorta one side opening by artificial blood vessel.The operation principle of axial-flow pump and work process are: after drive motors energising, coil windings 28 produces rotating excitation field, with the magnetic field interaction of rotor magnetic steel 4, promote impeller 1 to rotate, blood in Patients with Cardiac Failure ventricle is sucked, pump line 25 is entered into from pump intake 29, through pilot blade 10 rectification, impeller 1 pushes, then through reducer supercharging, after rear guide vane 17 rectification, flow out from pump discharge 30, flow through artificial blood vessel, enter in human body artery, realize the function of heart assistance with this, or even replace heart acting completely.
Claims (5)
1. a liquid electromagnetic levitation type axial-flow pump heart-assist device, for " pump-machine integrated device " that be made up of pump and drive motors two Iarge-scale system, the rotor magnetic steel of drive motors system is built in the impeller hub of pumping system, it is characterized in that: impeller has an outer shroud, outer shroud is wrapped in the stage casing of impeller blade, this section of runner is divided into inside and outside two runners, i.e. sprue and branch flow passage; The outer wall of outer shroud is carved with spiral groove, and groove roof is skewed, and what make branch flow passage meets head piece greatly, goes out head piece little; The sidewall of groove has one opening, and the blood of inner flow passage can enter outer flow passage from here because being subject to centrifugal effect, is outer flow passage fluid replacement; Inlay plush copper magnetic cone in impeller hub rear end, inlay the magnetic that one one be recess in rear guide vane wheel hub and bore, two magnetic bore be axial magnetic to, and opposite pole is relatively, and the two attracts each other, and produces axis pulling force backward to impeller.
2. a kind of liquid electromagnetic levitation type axial-flow pump heart-assist device as claimed in claim 1, it is characterized in that described impeller hub front port inlays a convex axle of pottery, pilot blade wheel hub port inlays a gem recess, and " convex axle-recess " matched in clearance becomes a pair " front slide bearing "; Impeller hub rear port inlays a ceramic dished cover, and rear guide vane wheel hub port inlays a recessed lid of gem, and " dished cover-recessed lid " matched in clearance becomes a pair " rear sliding bearing ".
3. a kind of liquid electromagnetic levitation type axial-flow pump heart-assist device as claimed in claim 1, is characterized in that described rotor magnetic steel is Nd-Fe-Bo permanent magnet material, and magnetic is to being radial direction.
4. a kind of liquid electromagnetic levitation type axial-flow pump heart-assist device as claimed in claim 1, is characterized in that rotor magnetic steel in described impeller hub and plush copper magnetic have the magnetic shield circle of a soft magnet between boring.
5. a kind of liquid electromagnetic levitation type axial-flow pump heart-assist device as claimed in claim 1, is characterized in that the caliber of described pump line back segment is fairshaped gradual change reducing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420558846.2U CN204219479U (en) | 2014-09-26 | 2014-09-26 | A kind of magnetic liquid suspension formula axial-flow pump heart-assist device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420558846.2U CN204219479U (en) | 2014-09-26 | 2014-09-26 | A kind of magnetic liquid suspension formula axial-flow pump heart-assist device |
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| Publication Number | Publication Date |
|---|---|
| CN204219479U true CN204219479U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420558846.2U Expired - Fee Related CN204219479U (en) | 2014-09-26 | 2014-09-26 | A kind of magnetic liquid suspension formula axial-flow pump heart-assist device |
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| CN (1) | CN204219479U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104208764A (en) * | 2014-09-26 | 2014-12-17 | 长治市久安人工心脏科技开发有限公司 | Magnetic fluid suspension type axial pump heart assisting device |
| CN106310410A (en) * | 2016-08-12 | 2017-01-11 | 常俊 | Pulse self-adaptive artificial heart |
| CN107921187A (en) * | 2015-08-04 | 2018-04-17 | 阿比奥梅德欧洲股份有限公司 | Blood pump |
| US11368081B2 (en) | 2018-01-24 | 2022-06-21 | Kardion Gmbh | Magnetic coupling element with a magnetic bearing function |
| US11754075B2 (en) | 2018-07-10 | 2023-09-12 | Kardion Gmbh | Impeller for an implantable, vascular support system |
| US11944805B2 (en) | 2020-01-31 | 2024-04-02 | Kardion Gmbh | Pump for delivering a fluid and method of manufacturing a pump |
-
2014
- 2014-09-26 CN CN201420558846.2U patent/CN204219479U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104208764A (en) * | 2014-09-26 | 2014-12-17 | 长治市久安人工心脏科技开发有限公司 | Magnetic fluid suspension type axial pump heart assisting device |
| CN107921187A (en) * | 2015-08-04 | 2018-04-17 | 阿比奥梅德欧洲股份有限公司 | Blood pump |
| CN107921187B (en) * | 2015-08-04 | 2021-07-20 | 阿比奥梅德欧洲股份有限公司 | Blood pump |
| CN106310410A (en) * | 2016-08-12 | 2017-01-11 | 常俊 | Pulse self-adaptive artificial heart |
| CN106310410B (en) * | 2016-08-12 | 2018-07-17 | 常俊 | A kind of adaptive artificial heart of pulsation |
| US11368081B2 (en) | 2018-01-24 | 2022-06-21 | Kardion Gmbh | Magnetic coupling element with a magnetic bearing function |
| US11804767B2 (en) | 2018-01-24 | 2023-10-31 | Kardion Gmbh | Magnetic coupling element with a magnetic bearing function |
| US11754075B2 (en) | 2018-07-10 | 2023-09-12 | Kardion Gmbh | Impeller for an implantable, vascular support system |
| US11944805B2 (en) | 2020-01-31 | 2024-04-02 | Kardion Gmbh | Pump for delivering a fluid and method of manufacturing a pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20160926 |