CN204106670U - A kind of magnetic suspension shaft streaming blood pump - Google Patents
A kind of magnetic suspension shaft streaming blood pump Download PDFInfo
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- CN204106670U CN204106670U CN201420527929.5U CN201420527929U CN204106670U CN 204106670 U CN204106670 U CN 204106670U CN 201420527929 U CN201420527929 U CN 201420527929U CN 204106670 U CN204106670 U CN 204106670U
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- magnetic
- impeller
- magnet
- blood pump
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Abstract
This utility model relates to a kind of blood pump, specifically a kind of magnetic suspension shaft streaming blood pump of implant into body of biomedical engineering field.This utility model is " pump-machine integrated ", it is characterized in that: to inlay respectively in impeller hub, forward and backward impeller inducer hub " convex-recessed magnetic cone ", magnetic cone be axial magnetic to, and like pole is relative, fit in two to " permanent-magnet suspension bearing ", impeller is suspended completely; Impeller and forward and backward impeller inducer hub port inlay two to " dished cover-recessed lid ", matched in clearance becomes two to " sliding bearing ", it had both support impeller and had entered suspended state reposefully, protected again the magnet of impeller and permanent-magnet suspension bearing, make it can not direct friction, collide and corroded; Respectively there is a soft magnetism iron ring at rotor magnetic steel two in impeller hub, the magnetic interference between boring for shielding rotor magnet steel and forward and backward plush copper magnetic; Impeller blade is two long add two short variable-pitch propeller blades, and runner is two enter four and go out, and is conducive to the efficiency improving blood pump.
Description
Technical field
This utility model relates to the special blood pump of a kind of human body, specifically a kind of magnetic suspension shaft streaming blood pump of implant into body of biomedical engineering field.
Background technology
Known " axial blood pump " is less than " centrifugal blood pump " volume at present, and easily implant, therefore clinical practice occupies absolute magnitude." axial blood pump " is divided into " having axle axial blood pump " and " suspension axial blood pump " according to supporting with or without mechanical bearing again." have axle axial blood pump " because bearing high-speed resistance easily produces mechanical breakdown, the life-span is short, and along with the complication such as mechanical hemolysis due, thrombosis." suspension axial blood pump " is all " active magnetic axial blood pump " substantially, the closed-loop control system of its complexity be made up of together position sensor, power amplifier, controller controls, and blood pump does not although it is so have bearing, can not mechanical friction, the life-span of pump is long, mechanical hemolysis due is lower, but the system complex of pump, and blood flow dead angle is many, area is large, thrombosis problem is serious, and the volume and weight of pump ratio " has axle axial blood pump " greatly, increases implantation difficulty.
As can be seen here, reducing the volume and weight of blood pump, improve stability and working life, reduce the complication such as haemolysis and thrombosis, is the target that axial blood pump is optimized.
Summary of the invention
The purpose of this utility model is to provide a kind of magnetic suspension shaft streaming blood pump that can reduce the complication such as haemolysis and thrombosis, good stability, long working life, little, the lightweight permanent-magnet suspension bearing of volume.
This utility model is " pump-machine integrated ", primarily of pump case, iron core, coil windings, pump line, Permanent-magnet bearing, impeller, rotor magnetic steel, forward and backward water conservancy diversion leaf composition, it is characterized in that: in impeller hub front end, inlay a plush copper magnetic cone, inlay the magnetic that one one is recess in pre-turning vane wheel hub to bore, two magnetic cone be axial magnetic to, and like pole is relative, the two fits in a pair " front permanent-magnet suspension bearing "; An also plush copper magnetic cone is inlayed in impeller hub rear end, inlay the magnetic that one one is recess in rear impeller inducer hub to bore, two magnetic cone be axial magnetic to, and like pole is relative, the two fits in a pair " rear permanent-magnet suspension bearing ", and impeller suspends to " permanent-magnet suspension bearing " by two completely.
Above-mentioned " front permanent-magnet suspension bearing " is all larger than " rear permanent-magnet suspension bearing " quality and magnetic force, is convenient to the blood forward thrust resisted and balance rotary blade is subject to, makes impeller suspended.
Above-mentioned forward and backward impeller inducer hub port respectively inlays a recessed lid of pottery, impeller hub front port inlays a ceramic dished cover, rear port is the metal dished cover of disjunctor, two become " sliding bearing " of matched in clearance to " dished cover-recessed lid ", it had both support impeller and had entered suspended state reposefully, protect again the magnet of impeller and permanent-magnet suspension bearing, make it can not direct friction, collide and corroded; " sliding bearing " self can some rubs when in impeller startup or speed change, and when impeller even running enters complete suspended state, sliding friction disappears thereupon.
Respectively there is a soft magnetism iron ring at p-m rotor magnet steel two in above-mentioned impeller hub, the magnetic interference that the plush copper magnetic for shielding rotor magnet steel and two is bored.
Above-mentioned impeller blade is that two length add two short variable-pitch propeller blades, runner is two enter four and go out, and namely the leading portion of impeller is two symmetrical elongated helical blades, adds two symmetrical short helical blades at back segment, this is conducive to blood diffusion, rectification, improves the efficiency of blood pump.
Above-mentioned rotor magnetic steel is Nd-Fe-Bo permanent magnet material, and magnetic is to being radial direction.
This utility model has the following advantages compared with prior art:
This utility model two pairs of permanent-magnet suspension bearings can be formed rotary blade " entirely suspending ", and do not have mechanical friction, the life-span of pump is long, reduces mechanical hemolysis due and the chance because of frictional heat triggering thrombus; And because the structure of this structural rate active magnetic is simple, volume is little, lightweight, easy implant into body.
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 forward and backward water conservancy diversion leaf combination schematic perspective view.
In figure: 1. impeller, 2. impeller blade, 3. impeller hub, 4. rotor magnetic steel, 5. magnetic shield circle before, plush copper magnetic cone 6., dished cover 7., recessed lid 8., 9. pre-turning vane, 10. pre-turning vane wheel hub, recess magnetic cone before 11., magnetic shield circle after 12., plush copper magnetic cone after 13., dished cover after 14., 15. recurve lids, recess magnetic cone after 16., water conservancy diversion leaf after 17., impeller inducer hub after 18., 19. pump lines, 20. pump cases, 21. stator cores, 22. coil windings, 23. pump intakes, 24. pump discharges.
Detailed description of the invention
This utility model is " pump-machine integrated ", forms " Permanent-magnet bearing " primarily of pump case 20, stator core 21, coil windings 22, pump line 19, impeller 1, rotor magnetic steel 4, pre-turning vane 9, rear water conservancy diversion leaf 17 and two.Inlay plush copper magnetic cone 6 in the front end of impeller hub 3, front recess magnetic cone 11, two magnetic cones that to inlay in pre-turning vane wheel hub 10 be recess be axial magnetic to, and like pole is relative, and the two fits in a pair " front permanent-magnet suspension bearing "; Plush copper magnetic cone 13 after inlaying one in the rear end of impeller hub 3, inlay in rear impeller inducer hub 18 rear recess magnetic cone 16, two magnetic cones that one one is recess be axial magnetic to, and like pole is relative, and the two fits in a pair " rear permanent-magnet suspension bearing ".Two all support impeller 1 to " permanent-magnet suspension bearing " is radial and axial, because two is that " convex-recessed " coordinates to " permanent-magnet suspension bearing ", after centre adds " dished cover-recessed lid ", gap is very little, impeller 1 is made to move radially scope very little, all the time can not be rebuffed, therefore its radial direction belongs to " suspended state ", impeller 1 two is withstood " permanent-magnet suspension bearing " by two, axially be in the autobalance state of power all the time, due to " front permanent-magnet suspension bearing " than the quality of " rear permanent-magnet suspension bearing " and magnetic force large, therefore also large than the latter of the former suspension fit clearance, to impeller 1 axially magnetic thrust is also relatively large backward, make impeller 1 when static axial location toward retrodeviating, when impeller 1 works rotation, blood has an axial forward thrust to impeller 1, impeller 1 is axially passed forward, rotating speed strengthens, impeller 1 forward displacement increases, " front permanent-magnet suspension bearing " fit clearance reduces, magnetic thrust just increases backward, but axially magnetic thrust againsts the axial forward thrust of blood to impeller 1 all the time backward, and be ultromotivity balance, therefore the impeller 1 of normal work is axially in " suspended state " all the time, also just say, impeller 1 in certain range of speeds can be in " full suspended state ".
Above-mentioned impeller hub 3 front port inlays the front dished cover 7 of a ceramic material, inlays the front recessed lid 8 of a ceramic material in pre-turning vane wheel hub 10 port, and the two is " dished cover-recessed lid ", and matched in clearance is " front slide bearing " in a pair, impeller hub 3 rear port is the rear dished cover 14 with wheel hub disjunctor, the recurve lid 15 of a ceramic material is inlayed in rear impeller inducer hub 18 port, the two is " dished cover-recessed lid ", matched in clearance a pair " rear sliding bearing ", two had both support impeller 1 to " sliding bearing " enters suspended state reposefully, protect again the magnet of impeller 1 and two to " permanent-magnet suspension bearing ", making it can not direct friction, collide and corroded, when blood pump startup or speed change, " sliding bearing " self understands some friction, when even running after blood pump speed governing, when impeller 1 enters complete suspended state, sliding friction disappears thereupon.
Respectively there are a front magnetic shield circle 5 and rear magnetic shield circle 12 in rotor magnetic steel 4 two in above-mentioned impeller hub 3, and material is the permeability magnetic material such as silicon steel, ferrum, for shielding rotor magnet steel 4 and front plush copper magnetic bore 6 and rear plush copper magnetic bore magnetic interference between 13.
Above-mentioned impeller blade 2 is that two length add two short variable-pitch propeller blades, runner is two enter four and go out, and namely the leading portion of impeller 1 is two symmetrical elongated helical blades, adds two symmetrical short helical blades at back segment, this is conducive to blood diffusion, rectification, improves the efficiency of blood pump.
Above-mentioned rotor magnetic steel 4 is the Nd-Fe-Bo permanent magnet material of high energy product, and magnetic is to being radial direction.
Axial blood pump is implanted in the body of Patients with Cardiac Failure, pump intake 23 is communicated with ventricle or atrium incision by bend pipe, pump discharge 24 is communicated with by artificial blood vessel and human aortic otch are identical, when pump is energized, the magnetic field interaction of the rotating excitation field that coil windings 22 produces and rotor magnetic steel 4, promote impeller 1 to rotate, aspirate, carry blood, therefore realize the function of heart assistance or heart replacement.
Claims (6)
1. a magnetic suspension shaft streaming blood pump, for " pump-machine integrated ", primarily of pump case, iron core, coil windings, pump line, Permanent-magnet bearing, impeller, rotor magnetic steel, forward and backward water conservancy diversion leaf composition, it is characterized in that: in impeller hub front end, inlay a plush copper magnetic cone, inlay the magnetic that one one is recess in pre-turning vane wheel hub to bore, two magnetic cone be axial magnetic to, and like pole is relative, and the two fits in a pair " front permanent-magnet suspension bearing "; An also plush copper magnetic cone is inlayed in impeller hub rear end, inlay the magnetic that one one is recess in rear impeller inducer hub to bore, two magnetic cone be axial magnetic to, and like pole is relative, the two fits in a pair " rear permanent-magnet suspension bearing ", and impeller suspends to " permanent-magnet suspension bearing " by two completely.
2. a kind of magnetic suspension shaft streaming blood pump as claimed in claim 1, it is characterized in that described " front permanent-magnet suspension bearing " than " rear permanent-magnet suspension bearing " quality and magnetic force all large.
3. a kind of magnetic suspension shaft streaming blood pump as claimed in claim 1, it is characterized in that described forward and backward impeller inducer hub port respectively inlays a recessed lid of pottery, impeller hub front port inlays a ceramic dished cover, rear port is the metal dished cover of disjunctor, and two become " sliding bearing " of matched in clearance to " dished cover-recessed lid ".
4. a kind of magnetic suspension shaft streaming blood pump as claimed in claim 1, respectively there is the soft magnetism iron ring of a magnetic interference of boring for the plush copper magnetic at shielding rotor magnet steel and two at the p-m rotor magnet steel two that it is characterized in that in described impeller hub.
5. a kind of magnetic suspension shaft streaming blood pump as claimed in claim 1, it is characterized in that described impeller blade is that two length add two short variable-pitch propeller blades, runner is two enter four and go out, and namely the leading portion of impeller is two symmetrical elongated helical blades, adds two symmetrical short helical blades at back segment.
6. a kind of magnetic suspension shaft streaming blood pump 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420527929.5U CN204106670U (en) | 2014-09-15 | 2014-09-15 | A kind of magnetic suspension shaft streaming blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420527929.5U CN204106670U (en) | 2014-09-15 | 2014-09-15 | A kind of magnetic suspension shaft streaming blood pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204106670U true CN204106670U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420527929.5U Withdrawn - After Issue CN204106670U (en) | 2014-09-15 | 2014-09-15 | A kind of magnetic suspension shaft streaming blood pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204106670U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104208763A (en) * | 2014-09-15 | 2014-12-17 | 长治市久安人工心脏科技开发有限公司 | Magnetic suspension axial flow type blood pump |
| CN106823029A (en) * | 2017-01-23 | 2017-06-13 | 中南大学 | A kind of Computational Fluid Dynamics Analysis of Micro-Axial Blood Pumps with non-isometric splitterr vanes structure |
| CN111561519A (en) * | 2019-02-14 | 2020-08-21 | 苏州心擎医疗技术有限公司 | Rigidity gain mechanism for magnetic suspension bearing, magnetic suspension bearing and blood pump |
-
2014
- 2014-09-15 CN CN201420527929.5U patent/CN204106670U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104208763A (en) * | 2014-09-15 | 2014-12-17 | 长治市久安人工心脏科技开发有限公司 | Magnetic suspension axial flow type blood pump |
| CN104208763B (en) * | 2014-09-15 | 2016-09-14 | 长治市久安人工心脏科技开发有限公司 | A kind of magnetic suspension shaft streaming blood pump |
| CN106823029A (en) * | 2017-01-23 | 2017-06-13 | 中南大学 | A kind of Computational Fluid Dynamics Analysis of Micro-Axial Blood Pumps with non-isometric splitterr vanes structure |
| CN111561519A (en) * | 2019-02-14 | 2020-08-21 | 苏州心擎医疗技术有限公司 | Rigidity gain mechanism for magnetic suspension bearing, magnetic suspension bearing and blood pump |
| CN111561519B (en) * | 2019-02-14 | 2021-06-25 | 苏州心擎医疗技术有限公司 | Rigidity gain mechanism for magnetic suspension bearing, magnetic suspension bearing and blood pump |
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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: 20160914 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |