CN104162191A - Liquid magnetic levitation axial-flow type heart auxiliary blood pump - Google Patents
Liquid magnetic levitation axial-flow type heart auxiliary blood pump Download PDFInfo
- Publication number
- CN104162191A CN104162191A CN201410450872.8A CN201410450872A CN104162191A CN 104162191 A CN104162191 A CN 104162191A CN 201410450872 A CN201410450872 A CN 201410450872A CN 104162191 A CN104162191 A CN 104162191A
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- CN
- China
- Prior art keywords
- impeller
- magnetic
- axial
- blood pump
- pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices
- A61M60/871—Energy supply devices; Converters therefor
Abstract
The invention relates to a special blood pump, in particular to a liquid magnetic levitation axial-flow type heart auxiliary blood pump which is implanted into a human body. The liquid magnetic levitation axial-flow type heart auxiliary blood pump is composed of a pump system and a motor system. The liquid magnetic levitation axial-flow type heart auxiliary blood pump is characterized in that the top of a spiral blade of an impeller is provided with an inclined top brim so that a flow feeding opening can be large and a flow discharging opening can be small; an axial magnetic cone is arranged on the rear segment in a hub of the impeller, an axial magnetic pillar is arranged in a hub of a rear guide blade, and the opposite magnetic poles of the two magnets are opposite; an axial magnetic ring is arranged in a motor shell and outside the rear segment of a pump pipe, and the opposite magnetic poles of the axial magnetic ring and the axial magnetic cone in the hub of the impeller are also opposite; a pair of protruding cover-pit sliding bearings at the rear end of the impeller have the radial and axial positioning function on the impeller when the impeller is started, the radial center positioning function generated by mutual attraction of the magnetic cone and the magnetic pillar is also achieved, and therefore the impeller can stably enter a levitation state; the rear segment of the pump pipe conducts reducing to achieve the functions of increasing pressure and improving the efficiency of the blood pump; front guide blade is removed from the front end of the impeller, the inlet flow area can be increased, and the function of improving the efficiency of the blood pump is achieved.
Description
Technical field
The present invention relates to a kind of special blood pump, specifically a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart of implant into body of biomedical engineering field.
Background technology
" assistant blood pump for heart " of being used widely clinically is at present mainly " axial blood pump ".Known axial blood pump great majority adopt the impeller support system of " axle-bearing ", are putting successively pilot blade, impeller, rear guide vane in the pump line of the pump housing.There is axle at impeller center, and two sliding bearings are embedded in respectively forward and backward stator center, to support axle and vane rotary.In the time of impeller high speed rotating, " axle-bearing " easily weares and teares, there is before this vibration, along with wear extent strengthens gradually and shakes aggravation, then occur that blade is rebuffed, the problem of mechanical breakdown, pump stall, and collision and frictional heating also can cause the serious complication such as mechanicalness haemolysis and thrombosis, and these all can cause patient death.
Known axial blood pump adopts suspension bearing system in addition, and become fashion trend, current this suspension bearing system is to adopt active magnetic suspension structure substantially, although solved the problem of wearing and tearing, vibration and heating, the life-span of pump is long, mechanicalness haemolysis is lighter, but the closed-loop control system that active magnetic suspension structure is made up of position sensor, rate amplifier, controller etc., complex structure, the volume of crossing blood parts is large, and the dead angle of blood flow is many, and area is large, thrombosis problem seems more outstanding, and this has also had a strong impact on the result of use of pump.
As can be seen here, optimize blood pump structure, reduce blood flow and wash away dead angle, the bearing arrangement having adopted, stability and the working life of raising pump, reduce the complication such as haemolysis and thrombosis, is the key of mechanical blood pump technology.
Summary of the invention
The object of this invention is to provide a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart that can reduce the complication such as haemolysis and thrombosis, good stability, long working life.
The present invention forms " pump-machine assembly " by pumping system and drive motors system two large divisions, and pumping system is made up of pump line, impeller, impeller hub, rear guide vane, rear guide vane wheel hub; Drive motors system is made up of interior p-m rotor and stator core, stator coil winding, motor housing, energy supply wire; The interior p-m rotor of drive motors system is embedded in the impeller hub of pumping system, it is characterized in that: top eaves is arranged at the spiral blade top of impeller, and top eaves has slight inclination, makes to meet head piece large, goes out head piece little; Back segment in impeller hub has an axial magnetic cone, has an axial magnetic post in the wheel hub of rear guide vane, and these two magnet opposite poles are relative; In pump line back segment outside, motor housing, having an axial magnet ring, is also that opposite pole is relative with the axial magnetic cone of back segment in impeller hub; Tend to balance the blood forward thrust that impeller is subject to and two magnetic attractions backward with joint efforts.
The caliber of above-mentioned pump line front and rear sections is fairshaped gradual change reducing transition.
Between radial permanent magnet rotor in above-mentioned impeller hub and the axial magnetic of impeller hub back segment cone, be provided with a magnetic shield circle soft magnet that plays magnetic screening action.
Between axial magnet ring in above-mentioned stator coil winding and pump line back segment outside, motor housing, be provided with an electromagnetic shielding ring soft magnet.
Above-mentioned soft magnet is silicon steel or iron block or amorphous soft-magnetic alloy material.
Between above-mentioned impeller hub rear end and rear guide vane wheel hub, be slidably matched.
Above-mentioned impeller hub rear end is ceramic dished cover, and the front port (before magnetic post) of rear guide vane wheel hub has a gem end cap recess, and the two matches, and forms a pair of " dished cover-recess sliding bearing ".
Above-mentioned impeller front end has been removed pilot blade.
The present invention has the following advantages compared with prior art:
Although the present invention is simple in structure, can form " hydraulic radial suspension " and " axial permanent magnetic suspension " to rotary blade, there is no mechanical friction, extend the life-span of bearing and pump, reduce mechanicalness haemolysis and the chance because of frictional heat triggering thrombosis; And because this structure is than initiatively maglev simple in structure, the volume of crossing blood parts is little, and the blood flow back and dead angle are few, greatly reduces and wash away bad and thrombosed probability because of blood; " dished cover-recess sliding bearing " of impeller rear end plays radial and axial positioning action to impeller in the time starting, and adds magnetic cone and the magnetic post radial center positioning action producing that attracts each other, and can be that impeller enters " suspended state " reposefully; The effect that pump line back segment reducing can play supercharging and improve blood pump efficiency; Impeller front end has been removed pilot blade can increase entrance flow area, plays the effect that improves blood pump efficiency.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is structure cutaway view of the present invention.
Fig. 2 is impeller and rear guide vane schematic perspective view.
Fig. 3 is the B-B cutaway view of Fig. 2.
In figure: 1. impeller, 2. blade, 3. top eaves, 4. impeller hub, 5. p-m rotor, 6. magnetic cone, 7. ceramic dished cover, 8. gem end cap recess, 9. magnetic post, 10. rear guide vane, 11. rear guide vane wheel hubs, 12. pump intakes, 13. pump lines, 14. energy supply wires, 15. motor housings, 16. stator cores, 17. stator coil windings, 18. magnetic shield circles, 19. electromagnetic shielding rings, 20. reducers, 21. magnet rings, 22. pump discharges, 23. pump line inwalls, 24. meet head piece, and 25. go out head piece, 26. direction of rotation.
Detailed description of the invention
The present invention forms " pump-machine assembly " by pumping system and drive motors system two large divisions, and pumping system is made up of pump line 13, impeller 1, impeller hub 4, rear guide vane 10, rear guide vane wheel hub 11, and impeller front end has been removed pilot blade, drive motors system is made up of interior p-m rotor 5 and stator core 16, stator coil winding 17, motor housing 15, energy supply wire 14, the interior p-m rotor 5 of drive motors system is embedded in the impeller hub 4 of pumping system, the top eaves 3 that the outer of each blade 2 of impeller 1 has a slice to tilt, top eaves 3 forms and meets head piece 24 with pump line inwall 23, go out head piece 25, and it is large to make to meet head piece 24, go out head piece 25 little, in the time that impeller 1 rotates according to direction of rotation 26, most blood flows through from interlobate sprue, fraction blood flows through between top eaves 3 and pump line inwall 23, larger than going out head piece 25 owing to meeting head piece 24, blood is squeezed, impeller 1 surrounding is produced to the pressure of surging uniformly, so impeller 1 is by " hydraulic radial suspension ", back segment in impeller hub has axial magnetic cone 6, has an axial magnetic post 9 in the wheel hub of rear guide vane, and these two magnet opposite poles are relative, and heteropole is inhaled mutually impeller has movably been produced to captivation backward, and attracts the center radially, in pump line 13 back segment outsides, in motor housing 15, there is an axial magnet ring 21, also be that opposite pole is relative with the axial magnetic cone 6 of the back segment in impeller hub, its magnetic is strong, impeller 1 is produced to larger captivation backward, when blood pump work, blood has an axial forward thrust to the impeller 1 of rotation, rotating speed is larger, thrust is larger, through reasonably design, blood pump is normally operated in certain range of speeds, tend to balance the blood forward thrust that impeller 1 is subject to and two magnetic attractions backward with joint efforts, therefore the impeller 1 while normally work is by " axial permanent magnetic suspension ", that is to say, normal impeller 1 of working is radial and axial can " suspend ", realizing impeller " suspends " entirely.
Between above-mentioned pump line 13 front and rear sections, there is reducer 20, can coordinate rear guide vane 10 rectification better, play the effect that improves blood pump efficiency and supercharging.
Between the axial permanent magnetic magnetic cone 6 of the radial permanent magnet rotor 5 in above-mentioned impeller hub 4 and impeller hub 4 back segments, be provided with a magnetic shield circle 18 that plays magnetic screening action.
Between axial magnet ring 21 in above-mentioned stator coil winding 17 and pump line 13 back segment outsides, motor housing 15, be provided with an electromagnetic shielding ring 19, stator coil winding 17 and magnet ring 21 are played to electromagnetic shielding action.
Above-mentioned magnetic shield circle 18 and electromagnetic shielding ring 19 are silicon steel or iron block or amorphous soft-magnetic alloy soft magnetic materials.
Above-mentioned impeller hub end is a ceramic dished cover 7, itself and rear guide vane wheel hub 11 front ports one in the same way the gem end cap recess 8 of nest shape be slidably matched, impeller is subject to magnetic attraction effect, static and while slowly running, pottery dished cover 7 withstands gem end cap recess 8, form a pair of " dished cover-recess sliding bearing ", impeller 2 is played in the time starting to radial and axial positioning action, after impeller 2 rotates, along with rotating speed improves, the blood forward thrust that impeller is subject to increases, the friction of sliding bearing also alleviates gradually, when blood pump rotating speed arrives after normal operating conditions, impeller is " axial permanent magnetic suspension " state, pottery dished cover 7 has left gem end cap recess 8, sliding friction is eliminated.
Axial blood pump is implanted in the body of Patients with Cardiac Failure, and pump intake 12 connects a bend pipe, is communicated with the apex otch of heart, and pump discharge 22 is coincide and is connected by " end-side " with human aortic by artificial blood vessel.In the time that drive motors is worked, the magnetic field interaction of the rotating excitation field that stator coil winding 17 produces and p-m rotor 5, for the rotation of impeller 1 provides torque and kinetic energy, blood in Patients with Cardiac Failure ventricle is sucked, enter into pump line 13 from pump intake 12, through the pushing of impeller 2, again after 10 rectifications of tail stator, reducer 20 superchargings, flow out from pump discharge 22, in artificial blood vessel flow into human body artery, this is the basic process of pump blood, realizes the function of blood pump accessory heart or replaces heart acting completely with this.
Claims (7)
1. a liquid magnetic suspension shaft streaming assistant blood pump for heart, " pump-machine assembly " being formed by pumping system and drive motors system two large divisions, pumping system is made up of pump line, impeller, impeller hub, rear guide vane, rear guide vane wheel hub; Drive motors system is made up of interior p-m rotor and stator core, stator coil winding, motor housing, energy supply wire; The interior p-m rotor of drive motors system is embedded in the impeller hub of pumping system, it is characterized in that: top eaves is arranged at the spiral blade top of impeller, and top eaves has slight inclination, makes to meet head piece large, goes out head piece little; Back segment in impeller hub has an axial magnetic cone, has an axial magnetic post in the wheel hub of rear guide vane, and these two magnet opposite poles are relative; In pump line back segment outside, motor housing, having an axial magnet ring, is also that opposite pole is relative with the axial magnetic cone of back segment in impeller hub; Tend to balance the blood forward thrust that impeller is subject to and two magnetic attractions backward with joint efforts.
2. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as claimed in claim 1, is characterized in that the caliber of described pump line front and rear sections is fairshaped gradual change reducing transition.
3. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as claimed in claim 1, is provided with a magnetic shield circle soft magnet that plays magnetic screening action between the radial permanent magnet rotor in the impeller hub described in it is characterized in that and the axial magnetic of impeller hub back segment cone.
4. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as claimed in claim 1, is characterized in that being provided with an electromagnetic shielding ring soft magnet between the axial magnet ring in described stator coil winding and pump line back segment outside, motor housing.
5. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as described in claim 3 or 4, is characterized in that described soft magnet is silicon steel or iron block or amorphous soft-magnetic alloy material.
6. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as claimed in claim 1, is characterized in that between described impeller hub rear end and rear guide vane wheel hub for being slidably matched.
7. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as claimed in claim 1, it is characterized in that described impeller hub rear end is ceramic dished cover, the front port of rear guide vane wheel hub has a gem end cap recess, and the two matches, and forms a pair of " dished cover-recess sliding bearing ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410450872.8A CN104162191B (en) | 2014-09-05 | 2014-09-05 | A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410450872.8A CN104162191B (en) | 2014-09-05 | 2014-09-05 | A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart |
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| Publication Number | Publication Date |
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| CN104162191A true CN104162191A (en) | 2014-11-26 |
| CN104162191B CN104162191B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410450872.8A Active CN104162191B (en) | 2014-09-05 | 2014-09-05 | A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart |
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| CN (1) | CN104162191B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512118A (en) * | 2016-11-02 | 2017-03-22 | 中南大学 | Totally-implanted magnetic liquid dual-suspension axial-flow blood pump |
| 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 |
| CN107281567A (en) * | 2017-07-27 | 2017-10-24 | 胡春雷 | Left ventricle auxiliary pump |
| CN107469168A (en) * | 2017-09-30 | 2017-12-15 | 北京安生生物技术有限责任公司 | A kind of Single Degree of Freedom Magnetic suspension centrifugal impeller for reducing thrombus and occurring |
| CN111097077A (en) * | 2020-01-08 | 2020-05-05 | 上海市东方医院（同济大学附属东方医院） | External magnetic drive liquid suspension axial-flow type blood pump |
| CN111655307A (en) * | 2018-01-31 | 2020-09-11 | 心脏器械股份有限公司 | Axial blood pump with impeller flushing operation |
| CN112703032A (en) * | 2018-09-21 | 2021-04-23 | 阿比奥梅德公司 | Using fiber optic sensors as diagnostic tools in catheter-based medical devices |
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| CN101244296A (en) * | 2008-03-21 | 2008-08-20 | 北京工业大学 | Magnetic and fluid velocity pressure mix suspending mechanical heart blood pump |
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| 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 |
| CN103977463A (en) * | 2014-06-06 | 2014-08-13 | 清华大学 | Implanted miniature antithrombus axial blood pump |
| CN204106669U (en) * | 2014-09-05 | 2015-01-21 | 长治市久安人工心脏科技开发有限公司 | A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart |
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2014
- 2014-09-05 CN CN201410450872.8A patent/CN104162191B/en active Active
Patent Citations (8)
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| CN1572331A (en) * | 2003-05-28 | 2005-02-02 | 迈克尔·P·戈尔多夫斯基 | Passive non-contacting smart bearing suspension for turbo blood-pumps |
| CN101244296A (en) * | 2008-03-21 | 2008-08-20 | 北京工业大学 | Magnetic and fluid velocity pressure mix suspending mechanical heart blood pump |
| US20110311383A1 (en) * | 2010-06-18 | 2011-12-22 | White Daniel G | Hydrodynamic chamfer thrust bearing |
| CN102743801A (en) * | 2011-04-19 | 2012-10-24 | 薛恒春 | Magnetic fluid suspension type axial blood pump without shaft ends |
| US20130330219A1 (en) * | 2012-05-17 | 2013-12-12 | Heartware, Inc. | Magnetically suspended pump |
| 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 |
| CN103977463A (en) * | 2014-06-06 | 2014-08-13 | 清华大学 | Implanted miniature antithrombus axial blood pump |
| CN204106669U (en) * | 2014-09-05 | 2015-01-21 | 长治市久安人工心脏科技开发有限公司 | A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart |
Cited By (9)
| 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 |
| CN106512118A (en) * | 2016-11-02 | 2017-03-22 | 中南大学 | Totally-implanted magnetic liquid dual-suspension axial-flow blood pump |
| CN107281567A (en) * | 2017-07-27 | 2017-10-24 | 胡春雷 | Left ventricle auxiliary pump |
| CN107469168A (en) * | 2017-09-30 | 2017-12-15 | 北京安生生物技术有限责任公司 | A kind of Single Degree of Freedom Magnetic suspension centrifugal impeller for reducing thrombus and occurring |
| CN107469168B (en) * | 2017-09-30 | 2024-04-02 | 北京安生生物技术有限责任公司 | Single-degree-of-freedom magnetic suspension centrifugal impeller for reducing thrombus |
| CN111655307A (en) * | 2018-01-31 | 2020-09-11 | 心脏器械股份有限公司 | Axial blood pump with impeller flushing operation |
| CN111655307B (en) * | 2018-01-31 | 2023-12-12 | 心脏器械股份有限公司 | Axial blood pump with impeller flushing operation |
| CN112703032A (en) * | 2018-09-21 | 2021-04-23 | 阿比奥梅德公司 | Using fiber optic sensors as diagnostic tools in catheter-based medical devices |
| CN111097077A (en) * | 2020-01-08 | 2020-05-05 | 上海市东方医院（同济大学附属东方医院） | External magnetic drive liquid suspension axial-flow type blood pump |
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