CN203842087U - Axial magnetic force uninstalling type axial flow pump heart auxiliary device - Google Patents
Axial magnetic force uninstalling type axial flow pump heart auxiliary device Download PDFInfo
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- CN203842087U CN203842087U CN201420178989.0U CN201420178989U CN203842087U CN 203842087 U CN203842087 U CN 203842087U CN 201420178989 U CN201420178989 U CN 201420178989U CN 203842087 U CN203842087 U CN 203842087U
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- impeller
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Abstract
The utility model relates to a special axial flow pump and specifically relates to an axial magnetic force uninstalling type axial flow pump heart auxiliary device implanted into human bodies in the field of biomedical engineering. The axial magnetic force uninstalling type axial flow pump heart auxiliary device is a pump and machine combined body, consists of a pump system and a motor system, and is characterized in that an impeller position controlling soft magnet is installed at the rear end of a stator core, when the impeller is driven by an external force to move frontwards or backwards in a pump barrel, the impeller position controlling soft magnet and the stator core produce a magnetic binding force on a permanent magnet rotor in an impeller hub, and the direction of the force is opposite to the direction of axial displacement of the impeller; when the axial flow pump works, a magnetic constraining force can form partial or even all axial magnetic force uninstalling on an axial force load of the impeller and a shaft so as to achieve axial magnetic levitation of the impeller. The axial magnetic force uninstalling type axial flow pump heart auxiliary device is capable of reducing mechanical friction losses and friction heat effects, preventing thrombogenesis in the pump, reducing complications, prolonging service life of the axial flow pump, and improving stability of continuous work.
Description
Technical field
This utility model relates to a kind of special axial-flow pump, specifically a kind of axial magnetic unload-type axial-flow pump heart-assist device of implant into body of biomedical engineering field.
Background technology
Various heart diseases develop into certain phase and all can have influence on the blood-pumping function of heart, and the normal blood-pumping function of heart is absolutely necessary to maintaining blood circulation of human body.Cardiac pumping function deficiency is called " heart failure ", and treating serious heart failure is a current clinical medical difficult problem.Helping or replace heart failure heart with artificial mechanical blood pump is a kind of effectively Therapeutic Method, and this mechanical blood pump is commonly referred to " heart-assist device " or " artificial heart ".The heart-assist device of some better performances is widely used clinically at present, but the application of heart-assist device is also faced with many problems, main is can cause some complication after heart-assist device implant into body, and because of bearing easily generation mechanical breakdown and ill effect of wearing and tearing at a high speed, these all can cause patient death.
At present, applying clinically maximum is implanted axial-flow pump heart-assist device.Known axial-flow pump structure is all made up of parts such as axial-flow pump, axial-flow pump motor, current supply lines.Axial-flow pump and axial-flow pump motor Chang Gongtong composition " pump-machine assembly ", when application, " pump-machine assembly " is implanted in body, axial-flow pump entrance is communicated with the apex otch of heart, can be by the blood drainage in ventricle in axial-flow pump, axial-flow pump outlet connects artificial blood vessel, and the other end of artificial blood vessel is coincide and is connected by " end-side " with human aortic.When axial-flow pump work, enter the blood of pump intake under the driving of rotary blade, pressure raises, and flows out from pump discharge, enters in human aortic through the artificial blood vessel of the port of export.When axial-flow pump is worked in this way, both can reduce intraventricular pressure, lower cardiac load, can improve again intra-arterial blood pressure, maintain peripheral circulation, and can effectively save the life of serious Patients with Cardiac Failure.
The axial-flow pump of application is more with what have mechanical axis to support clinically, and the impeller shaft of this pump is to keeping by mechanical axis and bearing with radial position.Axial-flow pump in working order under, impeller is in the time that drive fluid flows out, will inevitably produce the counteracting force (forward thrust) of fluid to impeller, its size is according to the difference of rotating speed and flow and different, under common ventricle subsidiary conditions, counteracting force changes in the scope of 0.2-0.6 kilogram, if rotating shaft diameter is designed to 2 millimeters, the pressure that the rotating shaft front end face of pressurized bears so reaches 6.4-19.1 kilogram/square centimeter.As independent employing end face slidingtype thrust bearing, resist counteracting force and at a high speed, violent friction, the Fast Wearing that this not only easily causes bearing material, causes mechanical breakdown; More seriously because friction produces more heat, the temperature at the position that makes to rub raises, and causes the albuminous degeneration necrosis in blood, adheres to heavy collection on axle sleeve surface, triggers formation and the growth of thrombosis.
Clinical practice also have " magnetic-liquid suspend " axial-flow pump without bearing, the position of its rotary blade is to be suspended and axial magnetic suspension keeps by radial fluid power.Although this axial-flow pump can be removed the friction effect of mechanical bearing, but because fluid dynamic suspends to levitation gap and the isoparametric strict demand of fluid viscosity, need to sacrifice some technical performances of pump, can not adopt the optimized structure of technology, so this blood pump is also difficult to reach the perfect condition of clinical needs.
Thus, optimize axial flow pump structure, reduce friction and heat effect, reduce complication, the working life and the stability that improve pump are the keys of heart-assist device technology.
Utility model content
The purpose of this utility model is to provide a kind ofly can reduce the complication such as thrombosis, improve the axial magnetic unload-type axial-flow pump heart-assist device in service life.
This utility model is " pump-machine assembly ", is made up of pumping system and drive motors system two large divisions, and pumping system is made up of pump barrel, impeller, locating shaft, forward and backward deflection cone and locating shaft back and front supporting chamber; Drive motors system is made up of interior p-m rotor, motor stator; P-m rotor is embedded in the impeller hub cavity of pump barrel the inside; It is characterized in that motor stator is made up of stator core, stator coil winding and impeller location control soft magnetic bodies again, impeller location control soft magnetic bodies is positioned at outside pump barrel, the rear end of stator core, impeller location control soft magnetic bodies and stator core produce magnetic confinement power, the opposite direction of the direction of magnetic confinement power and impeller axial displacement to the p-m rotor in impeller hub.
The p-m rotor of above-mentioned pump barrel the inside is embedded in the cavity of impeller hub, and such assembly is the impeller that drives blood flow, has formed again the rotor of axial-flow pump motor, in the time of machine operation, the rotating excitation field producing acts on rotor field, and drives impeller rotation, promotes blood flow.
Motor stator has increased impeller location control soft magnetic bodies, it retrains p-m rotor automatic center location in pump barrel together with stator core, when impeller is when being subject to external force displacement forward or backward, impeller location control soft magnetic bodies and stator core produce magnetic confinement power backward or forward to the p-m rotor in impeller hub.In the time that axial-flow pump is worked, the counteracting force (axial thrust forward) that blood flow produces drives impeller can make impeller displacement forward, now just there is a magnetic confinement power (axial unloading pulling force backward) antagonism with it, therefore form the power load " axial magnetic unloading " to impeller and axle, when antagonism two power complete equipilibriums time, axial force load is all unloaded, and forms " axial magnetic suspension " of impeller.By the size of design modifying impeller axial displacement, the intensity of rotor permanent magnet, and the physical dimension of impeller location control soft magnetic bodies and stator core, can make magnetic confinement power reach suitable size, realize " axial magnetic suspension " of impeller completely.
In above-mentioned pump barrel, the front deflection cone of arrival end setting is made up of the pilot blade on pilot blade wheel hub and wheel hub; The rear deflection cone of port of export setting is made up of the tail stator on tail stator wheel hub and wheel hub; The impeller that centre position arranges is made up of the impeller blade on impeller hub and wheel hub.
Above-mentioned locating shaft front support chamber and the locating shaft rear support chamber center in pilot blade wheel hub and rear guide vane wheel hub respectively, it is supporting locating shaft and vane rotary.
Above-mentioned impeller adopts axial screw leaf structure, and the p-m rotor of impeller hub intracavity adopts radial magnetizing.
The pump barrel port of export arranges tail stator, and the rotational component producing when the impeller-driven blood flow of high speed rotating changes into and is parallel to axial direct current when through tail stator, further improves fluid output pressure, thereby improves the energy conversion efficiency of axial-flow pump.
This utility model has the following advantages compared with prior art:
This utility model can reduce the axial force load of axial-flow pump impeller and axle, alleviates or eliminate the axial mechanical abrasion of axle, reduces frictional heat effect, prevents thrombosis in pump, reduces complication, and improves the working life of axial-flow pump and the stability of continuous firing.
Brief description of the drawings
Below in conjunction with drawings and Examples, this utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the principle schematic of axial magnetic unloading.
In figure: 1. pump barrel, 2. impeller, 3. impeller hub, 4. p-m rotor, 5. impeller blade, 6. locating shaft, 7. stator core, 8. stator coil winding, 9. impeller location control soft magnetic bodies, 10. tail stator, 11. pump discharges, 12. tail stator wheel hubs, 13. locating shaft rear support chambers, 14. locating shaft front support chambers, 15. artificial blood vessels, 16. energy supply wires, 17. pilot blade wheel hubs, 18. pilot blades, 19. pump chambers, 20. blood reflux active forces (axial thrust forward), 21. magnetic confinement power backward (axial unloading pulling force backward), 22. columniform axial-flow pump shells, 23. stator magnetic force centers, 24. permanent-magnet centers, 25. impeller axial displacements.
Detailed description of the invention
This utility model is made up of pumping system and drive motors system two large divisions, wherein pumping system is made up of pump barrel 1, impeller 2, locating shaft 6, forward and backward deflection cone and locating shaft back and front supporting chamber 14,13, and p-m rotor 4 is embedded in impeller hub 3 cavities of pump barrel 1 the inside; Drive motors system is made up of p-m rotor 4, motor stator, columniform axial-flow pump shell 22, energy supply wire 16; Motor stator is made up of stator core 7, stator coil winding 8 and impeller location control soft magnetic bodies 9 again, impeller location control soft magnetic bodies 9 is positioned at outside pump barrel, the rear end of stator core 7, impeller location control soft magnetic bodies 9 and stator core 7 produce magnetic confinement power to the p-m rotor 4 in impeller hub 3, the opposite direction of the direction of magnetic confinement power and impeller axial displacement.
In above-mentioned pump barrel, the front deflection cone of arrival end setting is made up of the pilot blade 18 on pilot blade wheel hub 17 and wheel hub; The rear deflection cone of port of export setting is made up of the tail stator 10 on tail stator wheel hub 12 and wheel hub; The impeller that centre position arranges is made up of the impeller blade 5 on impeller hub 3 and wheel hub.
Above-mentioned locating shaft front support chamber 14 and locating shaft rear support chamber 13 are respectively in pilot blade wheel hub 17 and rear guide vane wheel hub 12 center, and it is supporting locating shaft 6 and impeller 2 rotates.
Above-mentioned impeller 2 adopts axial screw leaf structure, and the p-m rotor 4 of impeller hub 3 intracavity adopts radial magnetizing.
Due to outside pump barrel 1, after stator core 7, spy is provided with the New Parent of impeller location control soft magnetic bodies 9(formation motor stator), be loaded into pump barrel 1 when interior at impeller 2, permanent-magnet center 24 overlaps with stator magnetic force center 23 automatically because being tied, in the time that permanent-magnet center 24 is offset forward the position of stator magnetic force center 23, will produce one with the magnetic confinement power backward of impeller axial displacement 25 opposite directions (axially unloading pulling force) backward 21, this magnetic confinement power backward 21 derives from impeller location control soft magnetic bodies 9 and stator core 7 is located the attraction of the p-m rotor 4 in impeller hub 3 and constraint.In the time that axial-flow pump is worked, impeller 2 can be subject to the axial thrust forward of a blood reflux active force 20(), a now just antagonism with it of magnetic confinement power backward 21, the axial force load of impeller 2 and locating shaft 6 front ends is brought into play to the effect of " axial magnetic unloading ", if more balance of two power antagonism, the effect of unloading is just better, in the time of antagonism complete equipilibrium, has just formed " axial magnetic suspension " of impeller.By the size of design modifying impeller axial displacement 25, the intensity of p-m rotor 4, and the physical dimension of impeller location control soft magnetic bodies 9 and stator core 7, can make magnetic confinement power backward 21 reach suitable size, make two power of antagonism in the time that axial-flow pump is worked reach poised state, realize " axial magnetic suspension " of impeller completely.
Axial-flow pump is implanted in the body of Patients with Cardiac Failure, and axial-flow pump entrance is communicated with the apex otch of heart, and pump discharge 11 connects artificial blood vessel 15, and the other end of artificial blood vessel 15 is coincide and is connected by " end-side " with human aortic.In the time of axial-flow pump machine operation, the rotating excitation field that stator coil winding 8 produces and rotor field interact, for the rotation of impeller 2 provides torque and kinetic energy.Therefore the negative pressure suction force producing is drawn into the blood in Patients with Cardiac Failure ventricle in pump chamber 19, blood is then through the pushing of impeller 2, again through 10 rectifications of tail stator, swirl component becomes direct current, after supercharging, flow out the artificial blood vessel 15 of flowing through from pump discharge 11, enter in human body artery the auxiliary pump blood basic process of axial-flow pump ventricle that Here it is.
Claims (4)
1. an axial magnetic unload-type axial-flow pump heart-assist device, it is " pump-machine assembly ", be made up of pumping system and drive motors system two large divisions, pumping system is made up of pump barrel, impeller, locating shaft, forward and backward deflection cone and locating shaft back and front supporting chamber; Drive motors system is made up of interior p-m rotor, motor stator; P-m rotor is embedded in the impeller hub cavity of pump barrel the inside; It is characterized in that motor stator is made up of stator core, stator coil winding and impeller location control soft magnetic bodies again, impeller location control soft magnetic bodies is arranged on outside pump barrel, the rear end of stator core, impeller location control soft magnetic bodies and stator core produce magnetic confinement power, the opposite direction of the direction of magnetic confinement power and impeller axial displacement to the p-m rotor in impeller hub.
2. axial magnetic unload-type axial-flow pump heart-assist device as claimed in claim 1, is characterized in that the front deflection cone of arrival end setting in described pump barrel is made up of the pilot blade on pilot blade wheel hub and wheel hub; The rear deflection cone of port of export setting is made up of the tail stator on tail stator wheel hub and wheel hub; The impeller that centre position arranges is made up of the impeller blade on impeller hub and wheel hub.
3. axial magnetic unload-type axial-flow pump heart-assist device as claimed in claim 1, it is characterized in that described locating shaft front support chamber and the center in pilot blade wheel hub and rear guide vane wheel hub respectively, locating shaft rear support chamber, it is supporting locating shaft and vane rotary.
4. axial magnetic unload-type axial-flow pump heart-assist device as claimed in claim 1, is characterized in that described impeller adopts axial screw leaf structure, and the p-m rotor of impeller hub intracavity adopts radial magnetizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178989.0U CN203842087U (en) | 2014-04-15 | 2014-04-15 | Axial magnetic force uninstalling type axial flow pump heart auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178989.0U CN203842087U (en) | 2014-04-15 | 2014-04-15 | Axial magnetic force uninstalling type axial flow pump heart auxiliary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203842087U true CN203842087U (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420178989.0U Expired - Fee Related CN203842087U (en) | 2014-04-15 | 2014-04-15 | Axial magnetic force uninstalling type axial flow pump heart auxiliary device |
Country Status (1)
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| CN (1) | CN203842087U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103877630A (en) * | 2014-04-15 | 2014-06-25 | 长治市久安人工心脏科技开发有限公司 | Heart auxiliary device of axial magnetic force unloading type axial flow pump |
| CN104274873A (en) * | 2014-10-13 | 2015-01-14 | 长治市久安人工心脏科技开发有限公司 | Miniature apex cordis axial-flow blood pump and implanting method thereof |
| CN113262393A (en) * | 2021-04-23 | 2021-08-17 | 天津大学 | Flexible magnetic suspension miniature centrifugal pump |
| US11368081B2 (en) | 2018-01-24 | 2022-06-21 | Kardion Gmbh | Magnetic coupling element with a magnetic bearing function |
| EP3624868B1 (en) * | 2017-05-19 | 2022-11-09 | Heartware, Inc. | Center rod magnet |
| 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
- 2014-04-15 CN CN201420178989.0U patent/CN203842087U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103877630A (en) * | 2014-04-15 | 2014-06-25 | 长治市久安人工心脏科技开发有限公司 | Heart auxiliary device of axial magnetic force unloading type axial flow pump |
| CN103877630B (en) * | 2014-04-15 | 2016-02-24 | 长治市久安人工心脏科技开发有限公司 | Axial magnetic unload-type axial-flow pump heart-assist device |
| CN104274873A (en) * | 2014-10-13 | 2015-01-14 | 长治市久安人工心脏科技开发有限公司 | Miniature apex cordis axial-flow blood pump and implanting method thereof |
| EP3624868B1 (en) * | 2017-05-19 | 2022-11-09 | Heartware, Inc. | Center rod magnet |
| 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 |
| CN113262393A (en) * | 2021-04-23 | 2021-08-17 | 天津大学 | Flexible magnetic suspension miniature centrifugal pump |
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Legal Events
| 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: 20140924 Termination date: 20170415 |