CN107050543A - A kind of microminiature micro-centrifugal blood pump with self-regulation blade - Google Patents
A kind of microminiature micro-centrifugal blood pump with self-regulation blade Download PDFInfo
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- CN107050543A CN107050543A CN201710307309.9A CN201710307309A CN107050543A CN 107050543 A CN107050543 A CN 107050543A CN 201710307309 A CN201710307309 A CN 201710307309A CN 107050543 A CN107050543 A CN 107050543A
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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
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
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- Heart & Thoracic Surgery (AREA)
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- Biomedical Technology (AREA)
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- Cardiology (AREA)
- Hematology (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)
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Abstract
The invention discloses a kind of microminiature micro-centrifugal blood pump with self-regulation blade.Prior art can not control boundary layer thickness, Secondary Flow and the eddy current crack in microminiature centrifugal blood pump very well.Every one-level blade suction surface of one stage impeller of the present invention is provided with winglet；Every two grade blades are fixed with a piece of oscillating vane by cylindrical bar, and cylindrical bar constitutes revolute pair with drive end bearing bracket；Arc-shaped rack is provided with the inside of active annulus, the gear of control cabinet output end is engaged with arc-shaped rack；The hinged end of each connecting rod and active annulus is uniform along the circumference of active annulus；Along the leading edge of oscillating vane to trailing edge direction, the piece oscillating vane and the hinged end of respective link are used as than setting cut-point by the corresponding sectional area of position cylindrical bar on the molded line of each oscillating vane.Two grade blades of the present invention have the different angles of attack, solve the demand of the flow parameter such as friction speed of blood under different conditions to adjustable vane established angle on different spiral case sections.
Description
Technical field
The invention belongs to fluid transport field, it is related to and a kind of automatically adjusts blade, low noise, to the low damage of haemocyte
Microminiature micro-centrifugal blood pump, more particularly to one kind automatically adjust blade and impeller blade suction according to control cabinet and push and pull system
There is the microminiature micro-centrifugal blood pump of small wing structure in face.
Background technology
Pump is a kind of universal machine applied widely, plays huge effect in the production, life in the mankind, no
Pump with species and various sizes is constantly manufactured also with new application needs and applied among industry-by-industry.According to
Pump, can generally be divided into following a few classes by the difference of characteristic dimension：Conventional pumps, microminiature pump and micropump.Wherein microminiature
Characteristic dimension scope substantially 1~50mm of pump, and the characteristic length of micropump and conventional pumps be respectively below 1mm and 50mm with
On.
Microminiature pump shows its good application prospect because of its special size range, such as micro motor and includes meter
The cooling system of electronic equipment including calculation machine CPU, pipeline pump, the temperature control system of fuel cell and now most widely used
General Medical Devices etc..
There is the larger viscosity characteristic easily rupturable with haemocyte in blood transportation in view of blood, how to design flowing and cut
The microminiature centrifugal pump that shear force is low, internal flow is stable is most important.But except convey liquid particularity in addition to, microminiature from
Extremely complex property is flowed in heart pump, is mainly reflected in：1) flowing is three-dimensionality；2) viscosity of fluid；3) non-stationarity of flowing.
Because transporting blood in viscosity and transporting the particularity of requirement, viscosity not only has influence on exit edge of blade to meet Ku Ta-eat
Blade wake passing vortex formed by Koffsky condition.Due to viscosity, blade surface and ring wall passage surface can be in the presence of viscous
Property boundary layer, have strong interaction between them and between main flow, produce " Secondary Flow " phenomenon.Secondary flow is micro-
Small-size centrifugal pump loss rises, the main contributor that efficiency declines.Meanwhile, Secondary Flow and vortex bursting are generation noises in centrifugal pump
Main source.
Meanwhile, heart is to convey blood by diastole and contraction, and output is pulsating flow (flow, pressure pulsation).
If allowing rotary blood pump to simulate human body naive hearts to export pulsating flow (flow, pressure pulsation), contribute to human body after openheart surgery
Recovery.But because rotation metrorrhagia is periodicity variable speed, the flow parameter (flow, pressure etc.) of blood is with the time in the cycle
Change, result in the speed inside blood pump, pressure, shearing force all moment occurs to change, the flow regime of moment change
And the particularity (haemocyte is broken, blood sticky big) of blood exacerbate whirlpool formation and shearing force to the damage of haemocyte
It is bad.The setting angle of the fixed blade of tradition is fixed, for flow of fluid principal direction of the variable speed centrifugal pump caused by rotation speed change
Change and the changes of parameters can not tackle in time, it is impossible to the Optimum Leaves setting angle preferably needed for flowing is provided,
Higher efficiency can not be all consistently achieved in the case of any rotating speed, the generation of vortex can be also caused, aggravates eddy current crack.Together
When, the spiral case being continually changing for area of section, the parameter such as flowing velocity is different on different sections, is now required different
Attack angle of blade can be more suitable, this requires the adjustable vane difference of variable speed pump to need to have different leaves according to different
Piece, which becomes, has different angle variable rates.
In summary, for variable speed micro-centrifugal blood pump, want design optimization and go out a kind of efficient, low noise, to haemocyte
The microminiature micro-centrifugal blood pump of low damage, seeks to control and reduces secondary flow, prevents vortex shedding or control the formation in whirlpool,
And the parameter with various change in being moved for variable speed finds the automatic adjustable of corresponding Optimum Leaves setting angle
The blade of section.
The content of the invention
The purpose of the present invention be for prior art can not control very well boundary layer thickness in microminiature centrifugal blood pump,
Secondary Flow and eddy current crack, it is impossible to which obtaining the situation of adjustable vane established angle blade for variable speed centrifugal pump, there is provided two-stage
The micro centrifugal pump of blade, specifically one-level blade suction surface have small wing structure, and sencond stage impeller is that band automatically adjusts established angle leaf
The microminiature micro-centrifugal blood pump of piece.
The present invention includes drive end bearing bracket, rear end cap, one stage impeller and two grades of adjustable vane impellers；Described drive end bearing bracket, rear end
Lid, one stage impeller and two grades of adjustable vane impellers are coaxially disposed.Every one-level blade suction surface of one stage impeller is in height side
To center be provided with winglet, the trailing edge of winglet is concordant with the trailing edge of one stage impeller；The short transverse of winglet and a grade blade
Short transverse is vertically arranged；The molded line length of the winglet is the 10%~15% of one-level vane type line length, and each one-level leaf
The molded line equal length of winglet on piece；Winglet cross section is the isosceles triangle of three equal roundings in angle, and radius of corner is isosceles
The 0.1~0.2 of triangle height；The angle that isosceles triangle is located at edge is minimum angles, and minimum angles are 30 °；Before winglet
Edge has 30 ° of inclination angles with respect to winglet short transverse；One-level vane thickness is the 0.3~0.4 of winglet trailing edge height.
Two grades of described adjustable vane impellers include active annulus, connecting rod, oscillating vane, cylindrical bar, two grade blades and control
Case processed.Z1The grade blade of piece two along two grades of adjustable vane impellers circumferentially, Z1=n*Z, n take 1,2 or 3, Z be one stage impeller one
Grade blade number.Every two grade blades are fixedly connected with a piece of oscillating vane by cylindrical bar, and cylindrical bar axial line is located at two grades
On the centering face of blade and oscillating vane；Cylindrical bar constitutes revolute pair with the circular hole that drive end bearing bracket is opened up, and oscillating vane is located at front end
Lid is outside, and two grade blades are located inside drive end bearing bracket.One end of every oscillating vane and a connecting rod is hinged, all connecting rods it is another
End is hinged with annulus part；Arc-shaped rack is provided with the inside of active annulus, gear and the arc-shaped rack of control cabinet output end are nibbled
Close；The corresponding central angle of arc-shaped rack is 30 °~60 °.Described cylindrical bar is provided with labyrinth-like sealing structure.
The hinged end of each connecting rod and active annulus is uniform along the circumference of active annulus；Each connecting rod and corresponding a piece of oscillating vane
The end position that is hinged specifically be calculated as follows：
1) using the line of snail tongue most salient point on annulus part center and spiral case as zero degree line, and gradually increased with spiral case sectional area
Direction be used as the increased positive direction of angle；Spiral case is made up of drive end bearing bracket and rear end cap；Avoid -15 ° of zero degree line~25 ° angle row
Cloth cylindrical bar, and take with zero degree line it is at 45 ° be first cylindrical bar position, remaining cylindrical bar avoids -15 ° of zero degree line~45 °
It is circumferentially uniform along two grades of adjustable vane impellers afterwards.
2) area on the basis of sectional area maximum in the sectional area of excessively each cylindrical bar central axis of spiral case is taken, spiral case mistake is calculated
The sectional area of each cylindrical bar central axis and the sectional area of reference area.
3) along the leading edge of oscillating vane to trailing edge direction, position cylindrical bar pair is pressed on the molded line of each oscillating vane
The sectional area answered is used as the piece oscillating vane and the hinged end of respective link than setting cut-point.
Pad is provided between described drive end bearing bracket and rear end cap, and drive end bearing bracket and rear end cap are bolted.
Cavity between described drive end bearing bracket and one stage impeller end face is pumping chamber, and pumping chamber is the entrance point of blood.
The internal diameter of the active annulus is 1.2 times of drive end bearing bracket inlet radius.
The center of rotation of the one stage impeller meets following formula with cylindrical bar central axis apart from L：
L-R1-0.5*L2=0.05R1；
In formula, L2For the molded line length of two grade blades, R1For one stage impeller radius.
Described labyrinth-like sealing structure includes two annular groove groups；Annular groove group by equidistant placement 6~8 annular grooves
Composition, the groove width of annular groove is equal with adjacent annular separation.
The defeated speed functions for thering is gear of output end variable speed to rotate of described control cabinet.
Beneficial effects of the present invention：
The present invention is provided with the small wing structure of isosceles triangle by fixing the blade impeller port of export in one-level, can control very well
Make due to the uneven caused Radial Flow of the pressure and centrifugal force of fluid, while cutting comb can also be carried out to big Passage Vortex
Reason, is effectively separated and is oriented to the viscous fluid in runner so that flowing turns into ideal flow state, reduces centrifugal pump
Trailing Edge Loss and eddy current crack.The size in a pair of channels whirlpool in blade passage is controlled, the two of radial motion has also just been controlled
Secondary stream, reduces the uneven of speed, reduces jet Trailing Edge Loss, it is suppressed that the vortices breakdown and flow loss of leaf road tail end are simultaneously controlled
Vortex shedding.
Two grades of adjustable vane impellers, the speed caused for the variable speed during centrifugal blood pump operation, pressure etc.
Cyclically-varying, suitable attack angle of blade can be selected according to come the change for liquid of bleeding, weaken " penetrating for one stage impeller outlet
Stream-tail ", weakens the big vortex that the port of export occurs, and blood is shunted and combed again, and big vortex is combed into
Small whirlpool, improves the internal flow situation of blood pump.Two grades of adjustable guide blades are similar to vane diffuser for whole blood pump, will
The kinetic energy of fluid is converted into useful pressure energy, further the lift of lifting blood pump, so that can be appropriate under identical lift
Reduction centrifugal pump rotating speed, and then reduce the centrifugal force that blood is received, reduce the centrifugal force that haemocyte is subject in blood.
Control cabinet shifts to an earlier date the speed functions of input/output terminal gear variable speed rotation, according to the change of function to output end tooth
Wheel is controlled, it is ensured that initial angular momentum of the adjustable vane on active annulus is that consistent, different length of connecting rod causes
The rate of change of the adjustable vane of different circumferential positions is different, and further causing different adjustable vanes has no leaf
Piece amount of spin, obtains different attack angle of blade, solves on different spiral case sections the flow parameter such as friction speed of blood not
To the demand of the established angle of adjustable vane with conditions of.The adjustable vane for meeting different circumferential positions is right under different rotating speeds
The different demands of adjustable vane established angle, just reduce the friction loss of blood, while having to the viscous fluid in runner
Effect separation, guiding, are caused as ideal flow state, reduce the noise of vortex shedding and turbo-charger set formation.Meanwhile, reduce from
The strength of vortex of heart pump simultaneously reduce further dynamic pressure, improve static pressure, so as to obtain higher efficiency.
Brief description of the drawings
Fig. 1 is structural perspective of the invention；
Fig. 2 is one stage impeller structure chart of the invention；
Fig. 3 is one-level blade construction figure of the invention；
Fig. 4 is the cylindrical bar of the present invention and the sealing means schematic diagram of drive end bearing bracket；
Fig. 5 is Fig. 4 A-A enlarged drawings；
Fig. 6 is the stereogram of two grades of adjustable vane impellers in the present invention；
Fig. 7 is the two-dimensional representation of two grades of adjustable vane impellers in the present invention；
Fig. 8 is the hinged end position distribution schematic diagram of each oscillating vane of the invention and corresponding oscillating vane.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
As shown in figure 1, a kind of microminiature micro-centrifugal blood pump with self-regulation blade, including drive end bearing bracket 1, rear end cap 2, one
Level impeller 3 and two grades of adjustable vane impellers 5；Pad 4 is provided between drive end bearing bracket 1 and rear end cap 2, and drive end bearing bracket 1 and rear end cap 2 are logical
Cross bolt connection；Drive end bearing bracket 1, rear end cap 2, one stage impeller 3 and two grades of adjustable vane impellers 5 are coaxially disposed.Drive end bearing bracket 1 and one
Cavity between the level end face of impeller 3 is pumping chamber, and pumping chamber is the entrance point of blood；The one-level lobe numbers Z=of one stage impeller 3
5。
As shown in Figures 2 and 3, every one-level blade suction surface of one stage impeller 3 is provided with winglet in the center of short transverse
3-1, the trailing edge of winglet is concordant with the trailing edge of one stage impeller 3；The short transverse of winglet is vertical with the short transverse of a grade blade to be set
Put；Winglet 3-1 molded line length be one-level vane type line length 10%~15%, and on each grade blade winglet molded line it is long
Degree is equal；Winglet cross section is the isosceles triangle of three equal roundings in angle, radius of corner for isosceles triangle height 0.1~
0.2；The angle that isosceles triangle is located at edge is minimum angles, and minimum angles are 30 °；The small relatively small wing of nose of wing highly has
30 ° of inclination angle δ；One-level vane thickness b2 is the 0.3~0.4 of winglet trailing edge height b1.To there is the leaf of larger flow instability
The exit of wheel runner adds small wing structure, can improve the flow condition at impeller, and the vortex structure for suppressing Ye Dao exits is produced,
Suppress " jet-wake " phenomenon of leaf road outlet, reduce eddy current crack caused by blade wake passing.
As shown in Fig. 1,4,6 and 7, two grades of adjustable vane impellers 5 include active annulus 9, connecting rod 8, oscillating vane 7, cylinder
Bar 6, two grade blades 10 and control cabinet 11.Z1The grade blade of piece two along two grades of adjustable vane impellers 5 circumferentially, Z1=n*Z, n take 1,
2 or 3, n=1 is taken in the present embodiment.Every two grade blades are fixedly connected with a piece of oscillating vane by cylindrical bar, cylindrical bar axle
Heart line is located on the centering face of two grade blades and oscillating vane；Cylindrical bar constitutes revolute pair with the circular hole that drive end bearing bracket 1 is opened up, and swings
Blade is located at outside drive end bearing bracket 1, and two grade blades are located inside drive end bearing bracket 1.One end of every oscillating vane and a connecting rod is hinged,
The other end of all connecting rods is hinged with annulus part；Active internal radius is 1.2 times of the inlet radius of drive end bearing bracket 1.Active annulus
Inner side is provided with arc-shaped rack 9-1, and the gear 11-1 of control cabinet output end is engaged with arc-shaped rack；Arc-shaped rack is corresponding
Central angle θ is 30 °~60 °, and 30 ° are taken in the present embodiment.Limitation to arc-shaped rack correspondence central angle, so as to limit two grades of leaves
The extreme position of piece.Because two grade blades can adjust the angle of attack, the present embodiment is by ensureing one stage impeller center of rotation and cylindrical bar
Central axis meet following formula apart from L ensure two grade blades and a grade blade close to but do not contact：
L-R1-0.5*L2=0.05R1；
In formula, L2For the molded line length of two grade blades, R1For one stage impeller radius.
As shown in figure 5, cylindrical bar is provided with labyrinth-like sealing structure, it is ensured that sticky blood will not be leaked.Labyrinth-like
Sealing structure includes two annular groove groups；Annular groove group is made up of 6~8 annular grooves of equidistant placement, the groove width of annular groove with
Adjacent annular separation is equal.
As shown in figure 8, the hinged end 8-1 of each connecting rod 8 and active annulus is uniform along the circumference of active annulus.Each connecting rod 8 with
Hinged end 8-2 positions corresponding with every cylindrical bar position spiral case (2 groups of drive end bearing bracket 1 and the rear end cap of a piece of oscillating vane 7 of correspondence
Into spiral case) sectional area size is relevant, and each connecting rod 8 is specifically calculated as follows with the hinged end 8-2 positions of corresponding a piece of oscillating vane 7：
1) using the line of snail tongue most salient point on annulus part center and spiral case as zero degree line, and gradually increased with spiral case sectional area
Direction be used as the increased positive direction of angle.Because snail tongue nearby -10 °~20 ° flowing instabilities, avoid -15 ° of zero degree line~
25 ° of angular displacement cylindrical bars.Cylindrical bar number is Z in the present embodiment1=5,45 ° of positions for first cylindrical bar are taken, remaining
Cylindrical bar is avoided circumferential uniform along two grades of adjustable vane impellers 5 behind -15 ° of zero degree line~45 °.
2) area on the basis of sectional area maximum in the sectional area of excessively each cylindrical bar central axis of spiral case is taken, this reality is calculated
Apply excessively each cylindrical bar central axis of spiral case in example sectional area and reference area sectional area than respectively 61%, 82%, 84%,
86% and 100%.
3) along the leading edge of oscillating vane to trailing edge direction, position cylindrical bar pair is pressed on the molded line of each oscillating vane
The sectional area answered is than setting cut-point, and as the piece oscillating vane 7 and the hinged end 8-2 of respective link 8, i.e. spiral case sectional area is got over
Cut-point is at the trailing edge of oscillating vane on the molded line of oscillating vane at big position.
The speed functions that the present invention rotates gear of output end variable speed are input to control cabinet, according to the change of function to defeated
Go out end tooth wheel to be controlled, it is ensured that initial angular momentum of the adjustable vane on active annulus is consistent, different length of connecting rod
Degree make it that the rate of change of the adjustable vane of different circumferential positions is different, and further causing different adjustable vanes has not
Blade amount of spin, obtains different attack angle of blade, solves sencond stage impeller blade caused by different spiral case sectional areas
Problem different in flow rate, i.e., for the different each blades of spiral case cross sectional flow rate rotational angle without.
Meanwhile, two grade blades can play a part of water conservancy diversion to the preceding pump chamber and rear pump chamber of the pump housing, be flowed for variable speed
The unstable carry out guide functions of ante-chamber and the back cavity flowing caused, there is a guide functions of blade, the preceding pump chamber of centrifugal pump and
The fluid in pump chamber can have a water conservancy diversion direction in advance afterwards, and viscous fluid is combed, and improve the flowing of front and rear pump chamber
Situation.
The impeller that sencond stage impeller is adjustable established angle blade, the speed being continually changing when being moved to centrifugal pump variable speed are provided
Degree, pressure, shearing force, change the established angle of two grade blades within the specific limits in time so that the blood flowed out from one-level blade
Potential energy is converted kinetic energy under the water conservancy diversion of two grade blades so that centrifugal pump is all consistently achieved in the case of any rotating speed most to be had
The efficiency of profit, meanwhile, two grade blades of aerofoil section can also suppress the generation of vortex, improve flow condition, weaken vortex and make an uproar
Sound.
Claims (7)
1. a kind of microminiature micro-centrifugal blood pump with self-regulation blade, including drive end bearing bracket, rear end cap, one stage impeller and two grades can
Adjust blade impeller, it is characterised in that：Described drive end bearing bracket, rear end cap, one stage impeller and two grades of adjustable vane impellers are coaxially set
Put；Every one-level blade suction surface of one stage impeller is provided with winglet, trailing edge and the one-level leaf of winglet in the center of short transverse
The trailing edge of wheel is concordant；The short transverse of winglet and the short transverse of a grade blade are vertically arranged；The molded line length of the winglet is
The molded line equal length of winglet on the 10%~15% of one-level vane type line length, and each grade blade；Winglet cross section is three
The isosceles triangle of the individual equal rounding in angle, radius of corner is the 0.1~0.2 of isosceles triangle height；Before isosceles triangle is located at
Angle at edge is minimum angles, and minimum angles are 30 °；The small relatively small wing short transverse of nose of wing has 30 ° of inclination angles；One grade blade is thick
Spend for the 0.3~0.4 of winglet trailing edge height；
Two grades of described adjustable vane impellers include active annulus, connecting rod, oscillating vane, cylindrical bar, two grade blades and control cabinet；
Z1The grade blade of piece two along two grades of adjustable vane impellers circumferentially, Z1The grade blade that=n*Z, n take 1,2 or 3, Z are one stage impeller
Number；Every two grade blades are fixedly connected with a piece of oscillating vane by cylindrical bar, cylindrical bar axial line be located at two grade blades and
On the centering face of oscillating vane；Cylindrical bar constitutes revolute pair with the circular hole that drive end bearing bracket is opened up, and oscillating vane is located at outside drive end bearing bracket,
Two grade blades are located inside drive end bearing bracket；One end of every oscillating vane and a connecting rod is hinged, the other ends of all connecting rods with
Annulus part is hinged；Arc-shaped rack is provided with the inside of active annulus, the gear of control cabinet output end is engaged with arc-shaped rack；Circular arc
The corresponding central angle of shape rack is 30 °~60 °；Described cylindrical bar is provided with labyrinth-like sealing structure；
The hinged end of each connecting rod and active annulus is uniform along the circumference of active annulus；The hinge of each connecting rod and corresponding a piece of oscillating vane
End position is connect specifically to be calculated as follows：
1) using the line of snail tongue most salient point on annulus part center and spiral case as zero degree line, and with spiral case sectional area gradually increased side
To being used as the increased positive direction of angle；Spiral case is made up of drive end bearing bracket and rear end cap；Avoid -15 ° of zero degree line~25 ° angular displacement circle
Mast, and take with zero degree line it is at 45 ° be first cylindrical bar position, remaining cylindrical bar avoids edge behind -15 ° of zero degree line~45 °
Two grades of adjustable vane impellers are circumferentially uniform；
2) area on the basis of sectional area maximum in the sectional area of excessively each cylindrical bar central axis of spiral case is taken, excessively each circle of spiral case is calculated
The sectional area of mast central axis and the sectional area of reference area；
3) it is corresponding by position cylindrical bar on the molded line of each oscillating vane along the leading edge of oscillating vane to trailing edge direction
Sectional area is used as the piece oscillating vane and the hinged end of respective link than setting cut-point.
2. a kind of microminiature micro-centrifugal blood pump with self-regulation blade according to claim 1, it is characterised in that：It is described
Drive end bearing bracket and rear end cap between be provided with pad, and drive end bearing bracket and rear end cap be bolted.
3. a kind of microminiature micro-centrifugal blood pump with self-regulation blade according to claim 1, it is characterised in that：It is described
Drive end bearing bracket and one stage impeller end face between cavity be pumping chamber, pumping chamber is the entrance point of blood.
4. a kind of microminiature micro-centrifugal blood pump with self-regulation blade according to claim 1, it is characterised in that：It is described
The internal diameter of active annulus is 1.2 times of drive end bearing bracket inlet radius.
5. a kind of microminiature micro-centrifugal blood pump with self-regulation blade according to claim 1, it is characterised in that：It is described
The center of rotation of one stage impeller meets following formula with cylindrical bar central axis apart from L：
L-R1-0.5*L2=0.05R1；
In formula, L2For the molded line length of two grade blades, R1For one stage impeller radius.
6. a kind of microminiature micro-centrifugal blood pump with self-regulation blade according to claim 1, it is characterised in that：It is described
Labyrinth-like sealing structure include two annular groove groups；Annular groove group is made up of 6~8 annular grooves of equidistant placement, annular groove
Groove width it is equal with adjacent annular separation.
7. a kind of microminiature micro-centrifugal blood pump with self-regulation blade according to claim 1, it is characterised in that：It is described
Control cabinet it is defeated have gear of output end variable speed rotate speed functions.
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| CN201710307309.9A CN107050543B (en) | 2017-05-04 | 2017-05-04 | Microminiature centrifugal blood pump with self-adjusting blades |
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| CN201710307309.9A CN107050543B (en) | 2017-05-04 | 2017-05-04 | Microminiature centrifugal blood pump with self-adjusting blades |
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| CN107050543B CN107050543B (en) | 2023-07-04 |
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| CN110345082A (en) * | 2019-07-11 | 2019-10-18 | 浙江理工大学 | Impeller timing angle and the adjustable two-stage centrifugal pump device and method of span |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11654275B2 (en) | 2019-07-22 | 2023-05-23 | Shifamed Holdings, Llc | Intravascular blood pumps with struts and methods of use and manufacture |
| US11724089B2 (en) | 2019-09-25 | 2023-08-15 | Shifamed Holdings, Llc | Intravascular blood pump systems and methods of use and control thereof |
| US11964145B2 (en) | 2019-07-12 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
| US12102815B2 (en) | 2019-09-25 | 2024-10-01 | Shifamed Holdings, Llc | Catheter blood pumps and collapsible pump housings |
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