CN204106669U - 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
- Publication number
- CN204106669U CN204106669U CN201420510830.4U CN201420510830U CN204106669U CN 204106669 U CN204106669 U CN 204106669U CN 201420510830 U CN201420510830 U CN 201420510830U CN 204106669 U CN204106669 U CN 204106669U
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- Prior art keywords
- impeller
- magnetic
- blood pump
- axial
- heart
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- 239000008280 blood Substances 0.000 title claims abstract description 41
- 210000004369 blood Anatomy 0.000 title claims abstract description 41
- 239000000725 suspension Substances 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 title claims abstract description 12
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007943 implant Substances 0.000 abstract description 2
- 208000007536 Thrombosis Diseases 0.000 description 5
- 230000017531 blood circulation Effects 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000008590 mechanical hemolysis Effects 0.000 description 3
- 206010018910 Haemolysis Diseases 0.000 description 2
- 206010019280 Heart failures Diseases 0.000 description 2
- 239000002473 artificial blood Substances 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008588 hemolysis Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000010338 mechanical breakdown Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Landscapes
- External Artificial Organs (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
This utility model relates to a kind of special blood pump, i.e. a kind of liquid magnetic suspension shaft streaming assistant blood pump for heart of implant into body.It 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, makes to meet head piece greatly, goes out head piece little; Back segment in impeller hub has an axial magnetic cone, and in the wheel hub of rear guide vane, have an axial magnetic post, these two magnet opposite poles are relative; Outside pump line back segment, in motor housing, have an axial magnet ring, boring with the axial magnetic in impeller hub is also that opposite pole is relative.A pair, impeller rear end " dished cover-recess sliding bearing " plays radial and axial positioning action to impeller when starting, and adds that magnetic cone to attract each other the radial center positioning action produced with magnetic post, impeller can be made to enter reposefully " 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
This utility model 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
Current " assistant blood pump for heart " of being used widely clinically mainly " axial blood pump ".Known axial blood pump great majority adopt 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 vane rotary.When impeller high speed rotating, " axle-bearing " easily weares and teares, there is vibration before this, strengthen gradually along with wear extent and shake aggravation, then occur that blade is rebuffed, mechanical breakdown, pump stall problem, and collision and frictional heating also can cause the complication such as serious mechanical hemolysis due and thrombosis, and 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 is adopt active magnetic structure substantially, although the problem solving wearing and tearing, vibration 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., complex structure, the volume 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 adopted, improve stability and the working life of pump, reducing the complication such as haemolysis and thrombosis, is the key of mechanical blood pump technology.
Summary of the invention
The purpose of this utility model 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.
This utility model is made up of " pump-machine assembly " 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 greatly, goes out head piece little; Back segment in impeller hub has an axial magnetic cone, and in the wheel hub of rear guide vane, have an axial magnetic post, these two magnet opposite poles are relative; Outside pump line back segment, in motor housing, have an axial magnet ring, boring with the axial magnetic of back segment in impeller hub is also that opposite pole is relative; 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.
The magnetic shield circle soft magnet that one is played magnetic screening action is provided with between the axial magnetic cone of the radial permanent magnet rotor in above-mentioned impeller hub and impeller hub back segment.
An electromagnetic shielding ring soft magnet 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.
Be slidably matched between above-mentioned impeller hub rear end and rear guide vane wheel hub.
Above-mentioned impeller hub rear end is ceramic dished cover, and the front port (before magnetic piece) of rear guide vane wheel hub has a gem end cap recess, and the two matches, and is formed a pair " dished cover-recess sliding bearing ".
Above-mentioned wheel nose eliminates pilot blade.
This utility model has the following advantages compared with prior art:
Although this utility model structure is simple, can be formed " hydraulic radial suspension " and " axial permanent magnetic suspension " rotary blade, there is no mechanical friction, extend the life-span of bearing and pump, reduce mechanical hemolysis due and the chance because of frictional heat triggering thrombus; And because the structure of this structural rate active magnetic is simple, the volume crossing blood parts is little, the blood flow back and dead angle few, greatly reduce because blood washes away bad and thrombosed probability; " dished cover-recess sliding bearing " of impeller rear end plays radial and axial positioning action to impeller when starting, and adding that magnetic cone and magnetic post attract each other the radial center positioning action produced, can be that impeller enters " suspended state " reposefully; 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
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 B-B sectional view of Fig. 2.
In figure: 1. impeller, 2. blade, 3. push up 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
This utility model is made up of " pump-machine assembly " 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 wheel nose eliminates 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 is formed with pump line inwall 23 and meets head piece 24, go out head piece 25, and it is large 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, larger than going out head piece 25 owing to meeting head piece 24, blood is squeezed, pressure of surging uniformly is produced to impeller 1 surrounding, 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 attracting creates captivation backward to moveable impeller, and attracts at the center of radial direction, outside pump line 13 back segment, an axial magnet ring 21 is had in motor housing 15, boring 6 with the axial magnetic of the back segment in impeller hub is also that opposite pole is relative, its magnetic is strong, larger captivation is backward produced to impeller 1, during blood pump work, blood has an axial forward thrust to the impeller 1 rotated, 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, impeller 1 when therefore normally working is by " axial permanent magnetic suspension ", that is, the impeller 1 of normal work is radial and axial can " suspend ", namely realize impeller " entirely to suspend ".
There is reducer 20 between above-mentioned pump line 13 front and rear sections, rear guide vane 10 rectification better can be coordinated, play the effect improving blood pump efficiency and supercharging.
The magnetic shield circle 18 that one is played magnetic screening action is provided with 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 segment.
Be 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, electromagnetic shielding action is played to stator coil winding 17 and magnet ring 21.
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 itself and rear guide vane wheel hub 11 front port one nest shape is in the same way slidably matched, impeller is subject to magnetic attraction effect, static with when slowly running, pottery dished cover 7 withstands gem end cap recess 8, formed a pair " dished cover-recess sliding bearing ", when starting, radial and axial positioning action is played to impeller 2, 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, 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 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 connected by " end-side " is identical with human aortic by artificial blood vessel.When drive motors works, the magnetic field interaction of the rotating excitation field that stator coil winding 17 produces and 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, through the pushing of impeller 2, again after tail stator 10 rectification, reducer 20 supercharging, flow out from pump discharge 22, flow in human body artery through artificial blood vessel, this is the basic process of pump blood, realizes the function of blood pump accessory heart or replace heart acting completely with this.
Claims (7)
1. a liquid magnetic suspension shaft streaming assistant blood pump for heart, " pump-machine assembly " that be made up of 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 greatly, goes out head piece little; Back segment in impeller hub has an axial magnetic cone, and in the wheel hub of rear guide vane, have an axial magnetic post, these two magnet opposite poles are relative; Outside pump line back segment, in motor housing, have an axial magnet ring, boring with the axial magnetic of back segment in impeller hub is also that opposite pole is relative; 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 the magnetic shield circle soft magnet that is played magnetic screening action between the axial magnetic cone that it is characterized in that radial permanent magnet rotor in described impeller hub and impeller hub back segment.
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 outside described stator coil winding and pump line back segment, in 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 is formed a pair " dished cover-recess sliding bearing ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510830.4U CN204106669U (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 |
|---|---|---|---|
| CN201420510830.4U CN204106669U (en) | 2014-09-05 | 2014-09-05 | A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204106669U true CN204106669U (en) | 2015-01-21 |
Family
ID=52324034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420510830.4U Withdrawn - After Issue CN204106669U (en) | 2014-09-05 | 2014-09-05 | A kind of liquid magnetic suspension shaft streaming assistant blood pump for heart |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204106669U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162191A (en) * | 2014-09-05 | 2014-11-26 | 长治市久安人工心脏科技开发有限公司 | Liquid magnetic levitation axial-flow type heart auxiliary blood pump |
| CN116592955A (en) * | 2023-07-17 | 2023-08-15 | 四川新川航空仪器有限责任公司 | Flow sensor |
-
2014
- 2014-09-05 CN CN201420510830.4U patent/CN204106669U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162191A (en) * | 2014-09-05 | 2014-11-26 | 长治市久安人工心脏科技开发有限公司 | Liquid magnetic levitation axial-flow type heart auxiliary blood pump |
| CN104162191B (en) * | 2014-09-05 | 2016-08-24 | 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 |
| CN116592955A (en) * | 2023-07-17 | 2023-08-15 | 四川新川航空仪器有限责任公司 | Flow sensor |
| CN116592955B (en) * | 2023-07-17 | 2023-09-22 | 四川新川航空仪器有限责任公司 | Flow sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |