CN104162191B - A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart - Google Patents
A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart Download PDFInfo
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- CN104162191B CN104162191B CN201410450872.8A CN201410450872A CN104162191B CN 104162191 B CN104162191 B CN 104162191B CN 201410450872 A CN201410450872 A CN 201410450872A CN 104162191 B CN104162191 B CN 104162191B
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- impeller
- magnetic
- blood pump
- axial
- heart
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- 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
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- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Hematology (AREA)
- Mechanical Engineering (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- External Artificial Organs (AREA)
Abstract
The present invention relates to a kind of special blood pump, a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart implanting human body.The present invention is made up of pumping system and electric system, it is characterized in that the top eaves of inclination is arranged at the spiral blade top of impeller so that meets head piece greatly, 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 the two magnet opposite pole is relative；Having an axial magnet ring outside pump line back segment, in motor housing, boring with the axial magnetic in impeller hub is also that opposite pole is relative.Impeller is played radial and axial positioning action by impeller rear end a pair " dished cover recess sliding bearing " on startup, add magnetic cone with magnetic post attract each other produce radial center positioning action, impeller can be made to stably enter " suspended state "；Pump line back segment reducing can play supercharging and improve the effect of blood pump efficiency；Wheel nose eliminates pilot blade can increase entrance flow area, plays the effect improving blood pump efficiency.
Description
Technical field
The present invention relates to a kind of special blood pump, the liquid magnetic suspension shaft streaming assistant blood pump for heart implanting human body of a kind of biomedical engineering field.
Background technology
" assistant blood pump for heart " that be widely applied clinically at present is mainly " axial blood pump ".Known axial blood pump great majority use the impeller support system of " axle bearing ", put pilot blade, impeller, rear guide vane in the pump line of the pump housing successively.Impeller central has axle, and two sliding bearings are embedded in forward and backward stator center respectively, to support axle and impeller rotation.When impeller high speed rotating, " axle bearing " easily weares and teares, vibration occurred before this, it is gradually increased along with wear extent and shakes aggravation, then occur blade be rebuffed, mechanical breakdown, the problem of pump stall, and colliding and frictional heating also can cause the complication such as serious mechanical hemolysis due and thrombosis, these all can cause patient death.
Known axial blood pump also has employing suspension bearing system, and become fashion trend, current this suspension bearing system substantially uses active magnetic structure, although solving abrasion, the problem vibrated and generate heat, the life-span of pump is long, mechanical hemolysis due is lighter, but the closed-loop control system that active magnetic structure is made up of position sensor, rate amplifier, controller etc., structure is complicated, the volume crossing blood parts is big, and the dead angle of blood flow is many, and area is big, thrombosis problem seems more prominent, and this has also had a strong impact on the using effect of pump.
As can be seen here, optimize blood pump structure, reduce blood flow and wash away dead angle, the bearing arrangement used, improves stability and the working life of pump, reduces the complication such as haemolysis and thrombosis, be the key of machinery blood pump technology.
Summary of the invention
It is an object of the invention 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 is by pumping system and drives electric system two large divisions to form " pump assembly is fit ", and pumping system is made up of pump line, impeller, impeller hub, rear guide vane, rear guide vane wheel hub；Electric system is driven to be made up of interior p-m rotor and stator core, stator coil winding, motor housing, energy supply wire；The interior p-m rotor driving electric system is embedded in the impeller hub of pumping system, it is characterised in that: the spiral blade top of impeller has top eaves, top eaves to have slight inclination so that meets head piece greatly, 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 the two magnet opposite pole is relative；Outside pump line back segment, in motor housing, there is an axial magnet ring, be 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.
It is provided with a magnetic shield circle soft magnet playing magnetic screening action between radial permanent magnet rotor and the axial magnetic cone of impeller hub back segment in above-mentioned impeller hub.
An electromagnetic shielding ring soft magnet it is provided with between axial magnet ring outside above-mentioned stator coil winding and pump line back segment, in motor housing.
Above-mentioned soft magnet is silicon steel or iron block or amorphous soft-magnetic alloy material.
It is slidably matched between above-mentioned impeller hub rear end and rear guide vane wheel hub.
Above-mentioned impeller hub rear end is pottery 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 " dished cover recess sliding bearing ".
Above-mentioned wheel nose eliminates pilot blade.
The present invention has the following advantages compared with prior art:
Though present invention simple in construction, rotary blade can be formed " hydraulic radial suspension " and " axial permanent magnetic suspension ", there is no mechanical friction, extend the life-span of bearing and pump, reduce mechanical hemolysis due and because frictional heat triggers the chance of thrombosis；And because this structure is than the simple in construction of active magnetic, the volume crossing blood parts is little, and the blood flow back and dead angle are few, greatly reduce because blood washes away bad and thrombosed probability；Impeller is played radial and axial positioning action by " the dished cover recess sliding bearing " of impeller rear end on startup, add magnetic cone with magnetic post attract each other produce radial center positioning action, can be that impeller stably enters " suspended state "；Pump line back segment reducing can play supercharging and improve the effect of blood pump efficiency；Wheel nose eliminates pilot blade can increase entrance flow area, plays the effect improving blood pump efficiency.
Accompanying drawing explanation
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is the structure sectional view of the present invention.
Fig. 2 is impeller and rear guide vane schematic perspective view.
Fig. 3 is the B-B sectional view of Fig. 2.
In figure: 1. impeller, 2. blade, 3. top eaves, 4. impeller hub, 5. p-m rotor, 6. magnetic cone, 7. pottery 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 is by pumping system and drives electric system two large divisions to form " pump assembly is fit ", 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 wheel nose eliminates pilot blade；Electric system is driven to be 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 driving electric system is embedded in the impeller hub 4 of pumping system, there is the top eaves 3 of a piece of inclination the outer of each blade 2 of impeller 1, top eaves 3 meets head piece 24 with pump line inwall 23 formation, go out head piece 25, and it is big to make to meet head piece 24, go out head piece 25 little, when 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, bigger than going out head piece 25 owing to meeting head piece 24, blood is squeezed, impeller 1 surrounding is produced pressure of surging uniformly, then impeller 1 is by " hydraulic radial suspension "；Back segment in impeller hub has an axial magnetic cone 6, has an axial magnetic post 9 in the wheel hub of rear guide vane, and the two magnet opposite pole is relative, the attracting captivation created moveable impeller backward of heteropole, and attracts at center radially；Outside pump line 13 back segment, an axial magnet ring 21 is had in motor housing 15, also it is that opposite pole is relative with the axial magnetic of the back segment in impeller hub cone 6, its magnetic is strong, impeller 1 is produced bigger captivation backward, during blood pump work, blood has a thrust axially forward to the impeller 1 rotated, rotating speed is the biggest, thrust is the biggest, 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, impeller 1 when the most normally working is by " axial permanent magnetic suspension ", that is, the impeller 1 of normal work is radial and axial can " suspend ", i.e. realize impeller " entirely to suspend ".
There is reducer 20 between above-mentioned pump line 13 front and rear sections, rear guide vane 10 preferably rectification can be coordinated, play raising blood pump efficiency and the effect of supercharging.
It is provided with a magnetic shield circle 18 playing magnetic screening action between the axial permanent magnetic magnetic cone 6 of the above-mentioned radial permanent magnet rotor 5 in impeller hub 4 and impeller hub 4 back segment.
It is provided with an electromagnetic shielding ring 19 between axial magnet ring 21 outside above-mentioned stator coil winding 17 and pump line 13 back segment, in motor housing 15, stator coil winding 17 and magnet ring 21 are played 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, the gem end cap recess 8 of its with rear guide vane wheel hub 11 front port one nest shape in the same direction is slidably matched, impeller is by magnetic attraction effect, static and when slowly running, pottery dished cover 7 withstands gem end cap recess 8, form a pair " dished cover recess sliding bearing ", impeller 2 is played radial and axial positioning action on startup, after impeller 2 rotates, along with rotating speed improves, the blood forward thrust that impeller is subject to increases, the friction of sliding bearing the most gradually alleviates, after blood pump rotating speed arrives normal operating conditions, impeller is in " axial permanent magnetic suspension " state, pottery dished cover 7 have left gem end cap recess 8, sliding friction is eliminated.
Axial blood pump is implanted to the internal of Patients with Cardiac Failure, and pump intake 12 connects a bend pipe, connects with the apex otch of heart, and pump discharge 22 is connected by " side " is identical with human aortic by artificial blood vessel.When driving motor work, the rotating excitation field of stator coil winding 17 generation and the magnetic field interaction of p-m rotor 5, rotation for impeller 1 provides torque and kinetic energy, blood in Patients with Cardiac Failure ventricle is sucked, pump line 13 is entered into from pump intake 12, pushing through impeller 2, again after tail stator 10 rectification, reducer 20 supercharging, flow out from pump discharge 22, in artificial blood vessel is flowed into human body artery, this is the basic process of pump blood, realizes the function of blood pump accessory heart with this or replaces heart acting completely.
Claims (6)
1. a liquid magnetic suspension shaft streaming assistant blood pump for heart, " pump assembly is fit " being made up of pumping system and driving electric system two large divisions, pumping system is made up of pump line, impeller, impeller hub, rear guide vane, rear guide vane wheel hub；Electric system is driven to be made up of interior p-m rotor and stator core, stator coil winding, motor housing, energy supply wire；The interior p-m rotor driving electric system is embedded in the impeller hub of pumping system, it is characterised in that: the spiral blade top of impeller has top eaves, top eaves to have slight inclination so that meets head piece greatly, 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 the two magnet opposite pole is relative；Outside pump line back segment, in motor housing, there is an axial magnet ring, be 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；It is provided with a magnetic shield circle soft magnet playing magnetic screening action between radial permanent magnet rotor and the axial magnetic cone of impeller hub back segment in described impeller hub.
2. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as claimed in claim 1, it is characterised 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, it is characterised in that be provided with an electromagnetic shielding ring soft magnet between the axial magnet ring outside described stator coil winding and pump line back segment, in motor housing.
4. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as described in claim 1 or 3, it is characterised in that described soft magnet is silicon steel or iron block or amorphous soft-magnetic alloy material.
5. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart as claimed in claim 1, it is characterised in that for being slidably matched between described impeller hub rear end and rear guide vane wheel hub.
6. 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 for pottery 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 " 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN104162191A CN104162191A (en) | 2014-11-26 |
| CN104162191B true 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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Families Citing this family (7)
| 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 |
| CN106512118B (en) * | 2016-11-02 | 2018-10-09 | 中南大学 | A kind of full-implantation type magnetic liquid dual suspension axial flow blood pump |
| CN107281567A (en) * | 2017-07-27 | 2017-10-24 | 胡春雷 | Left ventricle auxiliary pump |
| 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 |
| 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 |
| KR20210064195A (en) * | 2018-09-21 | 2021-06-02 | 아비오메드, 인크. | Use of Fiber Optic Sensors as Diagnostic Tools in Catheter-Based Medical Devices |
| CN111097077B (en) * | 2020-01-08 | 2022-09-23 | 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040241019A1 (en) * | 2003-05-28 | 2004-12-02 | Michael Goldowsky | Passive non-contacting smart bearing suspension for turbo blood-pumps |
| CN101244296B (en) * | 2008-03-21 | 2010-06-16 | 北京工业大学 | Magnetic and fluid velocity pressure mix suspending mechanical heart blood pump |
| US8894387B2 (en) * | 2010-06-18 | 2014-11-25 | Heartware, Inc. | 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 |
| WO2013173751A1 (en) * | 2012-05-17 | 2013-11-21 | Heartware, Inc. | Magnetically suspended 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 |
| CN103977463A (en) * | 2014-06-06 | 2014-08-13 | 清华大学 | Implanted miniature antithrombus axial blood pump |
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2014
- 2014-09-05 CN CN201410450872.8A patent/CN104162191B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN104162191A (en) | 2014-11-26 |
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Inventor after: Chen Haifeng Inventor after: Peng Yuanyi Inventor after: Wan Feng Inventor after: Li Guorong Inventor after: Tian Busheng Inventor after: Hao Zongchao Inventor after: Zhu Huizhan Inventor before: Peng Yuanyi Inventor before: Wan Feng Inventor before: Li Guorong Inventor before: Chen Haifeng Inventor before: Tian Busheng Inventor before: Hao Zongchao Inventor before: Zhu Huizhan |
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