CN107050542A - Minitype centrifugal blood pump and its circulation blood supply method that a kind of anti-haemocyte is damaged - Google Patents
Minitype centrifugal blood pump and its circulation blood supply method that a kind of anti-haemocyte is damaged Download PDFInfo
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- CN107050542A CN107050542A CN201710295443.1A CN201710295443A CN107050542A CN 107050542 A CN107050542 A CN 107050542A CN 201710295443 A CN201710295443 A CN 201710295443A CN 107050542 A CN107050542 A CN 107050542A
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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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- 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
- A61M60/50—Details relating to control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/42—Reducing noise
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Heart & Thoracic Surgery (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Cardiology (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- External Artificial Organs (AREA)
Abstract
The Minitype centrifugal blood pump and its circulation blood supply method damaged the invention discloses a kind of anti-haemocyte.Prior art can not control boundary layer thickness, Secondary Flow and eddy current crack in miniature blood centrifugal pump very well.Blade suction surface leading edge on impeller of the present invention is provided with the two suction surface concave point groups arranged along vane type line spacing, and blade pressure surface leading edge is provided with the three pressure face concave point groups arranged along vane type line spacing；Front hub is located at the impeller leaf road port of export and is provided with front hub winglet, and rear-wheel hub is located at the impeller leaf road port of export provided with two rear-wheel hub winglets.The two suction surface concave point groups and three pressure face concave point groups of the present invention cause the change of local edge interlayer so that tough blood can depart from blade surface, reduce boundary layer thickness；Front hub winglet and two rear-wheel hub winglets control fluid Radial Flow, reduce jet Trailing Edge Loss and eddy current crack.
Description
Technical field
The invention belongs to miniature pump technical field, it is related to a kind of efficient, low noise, the Minitype centrifugal to the low damage of haemocyte
Wheel hub has the Minitype centrifugal blood pump of winglet and its followed before and after blood pump, more particularly to blade inlet edge have round and smooth concave point and impeller
Ring blood supply method.
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.
The development of micropump starts from the seventies in last century, along with the hair of " microelectromechanical systems " and " micro-flow system "
Exhibition, the research of micropump is promoted.As the important performer of micro-flow system, it is micro- that micropump is widely used in liquid gas
Measure dispensing, flowing control, chemical analysis, environmental monitoring, micro injection and medicine transmit, integrated circuit it is chilly but, microminiature
In terms of the propulsion of satellite.Microminiature pump shows its good application prospect, such as microminiature electricity because of its special size range
Machine and cooling system comprising the electronic equipment including computer CPU, pipeline pump, the temperature control system of fuel cell and existing
In most widely used 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 micro centrifugal pump that shear force is low, internal flow is stable is most important.But in addition to conveying the particularity of liquid, micro centrifugal pump
Middle flowing is extremely complex, is mainly reflected in：1) flowing is three-dimensionality；2) viscosity of fluid；3) non-stationarity of flowing.Because defeated
Fortune blood not only has influence on exit edge of blade to meet Ku Ta-Ru Kefusi in viscosity and the particularity for transporting requirement, viscosity
Blade wake passing vortex formed by base condition.Due to viscosity, blade surface and ring wall passage surface can have viscous boundary
Layer, there is strong interaction between them and between main flow, produce so-called " Secondary Flow " phenomenon.Secondary flow is micro-
Type centrifugation pumping loss rises, the main contributor that efficiency declines.Meanwhile, Secondary Flow and vortex bursting are the masters that noise is produced in centrifugal pump
Originate.
In summary, want design optimization and go out a kind of efficient, low noise, the Minitype centrifugal blood to the low damage of haemocyte
Pump, seeks to control and reduces secondary flow, controls and reduce boundary layer thickness, prevents vortex shedding or control the formation in whirlpool.
The content of the invention
The purpose of the present invention is can not to control boundary layer thickness in miniature blood centrifugal pump, two very well for prior art
Secondary stream and there is provided blade inlet edge there is wheel hub before and after round and smooth concave point and impeller to have the Minitype centrifugal blood of winglet the problem of eddy current crack
Liquid pump and its circulation blood supply method, round and smooth concave point weaken the wall shear stress distribution of edge before the impeller, the two of control radial motion
Secondary stream, controls blade surface boundary layer thickness；, can to there is the exit of the impeller channel of larger flow instability plus winglet
To improve the flow condition at impeller, the vortex structure for suppressing Ye Dao exits is produced, and is reduced vortex caused by blade wake passing and is made an uproar
Sound；Flowing the type centrifugal pump by the improvement to micro centrifugal pump impeller wheel portion diverse location, shear stress is lower, and operation is imitated
Rate is higher, and noise is lower.
The Minitype centrifugal blood pump that a kind of anti-haemocyte of the present invention is damaged, including drive end bearing bracket, rear end cap and impeller；Impeller with
Drive end bearing bracket, rear end cap are coaxial, are driven by motor.
Blade suction surface leading edge on impeller is provided with the two suction surface concave point groups arranged along vane type line spacing b2, and b2 is
Blade along along molded line direction height average 15%~18%；Described suction surface concave point group is included along flat with blade inlet edge inclination angle
Five suction surface concave points of capable straight line；Blade inlet edge inclination angle is 20 °~30 °；Blade inlet edge is recessed to any one suction surface
The distance of point is all in the range of the 5%~15% of vane type line length；Suction surface concave point diametrically D hemispherical, D values are leaf
The 5%~10% of piece average thickness；The centre-to-centre spacing of adjacent suction face concave point is blade along along molded line direction in suction surface concave point group
The suction surface concave point centre bit in centre position in the 14%~16% of height average, the suction surface concave point group nearer from blade inlet edge
In the half height and position of blade height average along along molded line direction；From interposition in the suction surface concave point group of blade inlet edge farther out
In suction surface concave point of the suction surface concave point centre-height put than centre position in the suction surface concave point group nearer from blade inlet edge
Heart height is high, difference be blade along along molded line direction height average 10%~14%.
Blade pressure surface leading edge on impeller is provided with before the three pressure face concave point groups arranged along vane type line spacing, blade
The spacing of edge and the pressure face concave point group nearest from blade inlet edge for blade along along molded line direction height average 4%~6%, from
The spacing of the nearest pressure face concave point group of blade inlet edge and intermediate pressure face concave point group is blade height average along along molded line direction
14%~16%, the spacing of intermediate pressure face concave point group and the pressure face concave point group farthest from blade inlet edge is blade along molded line
The 9%~11% of height average on direction；Described pressure face concave point group is included along the straight line cloth parallel with blade inlet edge inclination angle
The five pressure face concave points put；Blade inlet edge to any one pressure face concave point distance all vane type line length 5%~
In the range of 30%；Pressure face concave point diametrically D hemispherical；The centre-to-centre spacing of adjacent pressure face concave point is leaf in pressure face concave point group
Piece along along molded line direction height average 14%~16%；The pressure face concave point centre bit in centre position in each pressure face concave point group
In 45% height and position of blade height average along along molded line direction.
Front hub is located at the impeller leaf road port of export and is provided with front hub winglet, and rear-wheel hub is located at the impeller leaf road port of export and is provided with two
Individual rear-wheel hub winglet；Leaf road port of export camber line is divided into bisection, the trailing edge of two rear-wheel hub winglets by the trailing edge of front hub winglet
Leaf road port of export camber line is divided into trisection；The thickness of front hub winglet and rear-wheel hub winglet be vane thickness 20%~
30%；The angle of outlet of front hub winglet and rear-wheel hub winglet is equal with outlet blade angle；The leading edge and impeller axle of front hub winglet
The angle of line is 10 °~40 °, and the angle of the small nose of wing of rear-wheel hub and impeller axis is 7 °~30 °；The molded line of front hub winglet is long
Degree is the 10% of vane type line length, and the molded line length of rear-wheel hub winglet is the 15% of vane type line length, front hub winglet and
The height of rear-wheel hub winglet is H, H values be blade along along molded line direction height average 5%~10%.
Pad is set between described drive end bearing bracket and rear end cap, and drive end bearing bracket and rear end cap are bolted.
5~8 blades being evenly distributed are had on described impeller.
The circulation blood supply method for the Minitype centrifugal blood pump that the anti-haemocyte is damaged is as follows：
Blood is entered by the import of drive end bearing bracket, and mechanical energy is converted into the mechanical energy of blood by the blade of impeller.Blade is inhaled
Three pressure face concave point groups of two suction surface concave point groups of edge and pressure face leading edge reduce haemocyte in flowing in face of power
Stress complexity, it is specific as follows：Two suction surface concave point groups of blade suction surface leading edge cause the change of local edge interlayer so that
Tough blood can depart from blade surface, reduce the boundary layer thickness on suction surface；Boundary shear stress in pressure face and
Distribution on suction surface is different, is distributed in the boundary shear stress Extreme maximum distribution of suction surface leading edge the 5% of vane type line length
In the range of~15%, the boundary shear stress Extreme maximum distribution of pressure face leading edge in the range of the 5%~30% of vane type line length,
And because pressure face upper wall surface shearing force distribution is wider, boundary shear stress with respect to suction surface rearward, is set in pressure face leading edge
Put three pressure face concave point groups, weakened contact of the sticky blood with wall, and then reduce blood and wall on pressure face
Viscous friction, improves the flow regime on blade pressure surface.
The blood of flowing mechanical energy in the leaf road of impeller is continuously increased, and front hub is located at the front-wheel of the impeller leaf road port of export
Hub winglet and rear-wheel hub control the pressure and centrifugal force due to fluid positioned at two rear-wheel hub winglets of the impeller leaf road port of export
Radial Flow caused by uneven, while also controlling the size in a pair of channels whirlpool in blade passage, has also just controlled and has radially transported
Dynamic Secondary Flow, 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
And vortex shedding is controlled, and then tough the blood boundary layer thickness of bottom surface and shedding frequence in whirlpool on leaf road are controlled, it is right
Big Passage Vortex is cut, is combed into small vortex, and the blood in runner is separated, is oriented to, reduce Trailing Edge Loss and
Eddy current crack.
Centrifugal action through impeller, impeller is rotated out of by blood.Blood travels further into spiral case, and the spiral case of variable cross-section is served as
The effect of vaneless diffuser, is further converted to potential energy by the part kinetic energy in blood, is then exported by volute outlet.
Beneficial effects of the present invention：
1st, the present invention can change viscosity larger by being provided with the concave point smoothly transitted in the leading edge of impeller blade suction surface
Blood suction surface blade inlet edge energy loss on suction surface of boundary layer thickness and blood, reduction suction surface leading edge
Wall shear stress so that the haemocyte on suction surface in blood will not be damaged because of larger boundary shear stress.For straight
The pressure face for having impact with blood is connect, the present invention is provided with what is smoothly transitted in the region that blade pressure surface boundary shear stress is concentrated
Concave point, can improve the flow condition on pressure face and improve boundary layer thickness, and correspondence reduces the wall shearing on pressure face
Power improves flow condition of the blood in impeller so as to reduce flow losses.Meanwhile, the reduction of pressure face upper wall surface shearing force
Also ensure that the integrality of haemocyte in blood, it is to avoid because the high shear of impeller blade leading edge haemocyte caused it is broken
It is bad.
2nd, the phenomenon of " jet-wake " is easily formed in the leaf road port of export for high-revolving centrifugal pump, and in Ye Dao
There is the flow behavior of vortex structure in upper and lower surface, there is provided upper and lower surface winglet, the pressure due to fluid can be controlled well
With the uneven caused Radial Flow of centrifugal force, while the size in a pair of channels whirlpool in blade passage can also be controlled, also just control
The Secondary Flow of radial motion has been made, has reduced the uneven of speed, has reduced jet Trailing Edge Loss, it is suppressed that the vortex strength of leaf road tail end
Degree and flow loss simultaneously control vortex shedding.Meanwhile, the larger blood of viscosity can effectively be controlled by being distributed on the winglet of upper and lower surface
The boundary layer thickness of bottom surface and the shedding frequence in whirlpool on leaf road, the structure can be cut to big Passage Vortex, be combed
Into countless small vortex, and the viscous fluid in runner is effectively separated, is oriented to, caused as ideal flow state, reduce
The Trailing Edge Loss and eddy current crack of centrifugal pump.
Brief description of the drawings
Fig. 1 is overall structure stereogram of the invention；
Fig. 2 is the structural perspective of impeller in the present invention；
Fig. 3 is the suction surface concave point distribution schematic diagram of impeller blade suction surface leading edge in the present invention；
Fig. 4 is the pressure face concave point distribution schematic diagram of impeller blade pressure face leading edge in the present invention；
Fig. 5 is forward and backward wheel hub winglet circumferential position figure of the invention；
Fig. 6 is front hub winglet structural representation of the invention；
Fig. 7 is rear-wheel hub winglet structural representation of the invention.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
As shown in figure 1, the Minitype centrifugal blood pump that a kind of anti-haemocyte is damaged, including drive end bearing bracket 1, rear end cap 2 and impeller
3；Pad 4 is set between drive end bearing bracket 1, rear end cap 2, and drive end bearing bracket 1 and rear end cap 2 are bolted；Impeller 3 and drive end bearing bracket 1,
Rear end cap 2 is coaxial, is driven by motor.
As shown in Figures 2 and 3, the blade suction surface leading edge on impeller 3 is provided with two suctions arranged along vane type line spacing b2
Power face concave point group, b2 be blade along along molded line direction height average 15%；Suction surface concave point group includes edge and inclined with blade inlet edge
Five suction surface concave point 3-1A of the parallel straight line in angle；Blade inlet edge inclination angle is 20 °；Blade inlet edge is to any one suction surface
The distance of concave point is all in the range of the 5%~15% of vane type line length；Suction surface concave point 3-1A diametrically D hemispherical, D takes
It is worth for the 5%~10% of blade average thickness；The centre-to-centre spacing b1 of adjacent suction face concave point is blade along type in suction surface concave point group
The suction surface concave point center in centre position in the 15% of height average on line direction, the suction surface concave point group nearer from blade inlet edge
Positioned at the half height and position of blade height average along along molded line direction；In the middle of in the suction surface concave point group of blade inlet edge farther out
Suction surface concave point of the suction surface concave point centre-height of position than centre position in the suction surface concave point group nearer from blade inlet edge
Centre-height is high, difference be blade along along molded line direction height average 12%.
As shown in Figures 2 and 4, the blade pressure surface leading edge on impeller 3 is provided with three pressure arranged along vane type line spacing
The spacing of face concave point group, blade inlet edge and the pressure face concave point group nearest from blade inlet edge is that blade height along along molded line direction is equal
The 5% of value, the spacing B2 of the pressure face concave point group nearest from blade inlet edge and intermediate pressure face concave point group is blade along molded line side
The spacing B3 of the 15% of upward height average, intermediate pressure face concave point group and the pressure face concave point group farthest from blade inlet edge is leaf
Piece along along molded line direction height average 10%；Pressure face concave point group is included along the straight line parallel with blade inlet edge inclination angle
Five pressure face concave point 3-2A；Blade inlet edge to any one pressure face concave point distance all vane type line length 5%~
In the range of 30%；Pressure face concave point diametrically D hemispherical；The centre-to-centre spacing B1 of adjacent pressure face concave point is in pressure face concave point group
Blade along along molded line direction height average 15%；The pressure face concave point in centre position is centrally located at leaf in each pressure face concave point group
45% height and position of piece height average along along molded line direction.
As shown in figures 2 and 5, front hub is located at the impeller leaf road port of export provided with front hub winglet 5-A, and rear-wheel hub is located at impeller
The leaf road port of export is provided with two rear-wheel hub winglet 5-B；Leaf road port of export camber line is divided into second-class by front hub winglet 5-A trailing edge
Point, leaf road port of export camber line is divided into trisection by two rear-wheel hub winglet 5-B trailing edge；Front hub winglet 5-A and rear-wheel hub are small
Wing 5-B thickness is five blades for having and being evenly distributed on the 20%~30% of vane thickness, impeller 3, therefore, the type
Micro centrifugal pump You Wugeye roads；Front hub winglet 5-A and rear-wheel hub winglet the 5-B angle of outlet are equal with outlet blade angle；Such as
Shown in Fig. 6 and 7, front hub winglet 5-A leading edge is θ 1 with the angle of impeller axis, and the values of θ 1 are 10 °~40 °, and rear-wheel hub is small
Wing 5-B leading edge is θ 2 with the angle of impeller axis, and the values of θ 2 are 7 °~30 °；Front hub winglet 5-A molded line length L1 is leaf
The 10% of piece molded line length, rear-wheel hub winglet 5-B molded line length L2 is the 15% of vane type line length L, front hub winglet 5-A
Height with rear-wheel hub winglet 5-B is H, H values be blade along along molded line direction height average 5%~10%.
The circulation blood supply method for the Minitype centrifugal blood pump that the anti-haemocyte is damaged is as follows：
Blood is entered by the import of drive end bearing bracket 1, and mechanical energy is converted into the mechanical energy of blood by the blade of impeller.Blood has
Easily rupturable characteristic when haemocyte stress is complicated in larger viscosity and blood, the friction that wall shear stress represents at wall is damaged
Lose, be a very important parameter for conveying the research of the interior stream of pump of blood.The big place of boundary shear stress is also should
Power concentrates place, not only easily causes the conevying efficiency of the broken influence blood pump of haemocyte in blood, and easily cause part
Boundary layer thickeies and produces small size vortex, and small size vortex is easily changed into large scale vortex by development, produces noise.Reduction
The boundary shear stress of suction surface leading edge integrated distribution, the corresponding stress weakened in runner close to blade suction surface leading edge can cause
Haemocyte is eased in the broken situation of the haemocyte that suction surface edge is caused by higher stress in blood.Suction surface
Boundary layer than pressure face border thickness much, causes suction surface flowing considerably complicated, and as fluid is from leading edge to trailing edge
During, suction surface adverse pressure gradient constantly increases, and causes suction surface boundary layer constantly to thicken, two suction of blade suction surface leading edge
The presence of face concave point group causes the change of local edge interlayer so that the larger blood of viscosity can depart from blade surface as early as possible, drop
Boundary layer thickness on low suction surface.Distribution of the boundary shear stress on pressure face and suction surface is different, is distributed in suction
The boundary shear stress Extreme maximum distribution of edge is in the range of the 5%~15% of vane type line length in face of power, the wall of pressure face leading edge
Face shearing force Extreme maximum distribution is in the range of the 5%~30% of vane type line length, and because pressure face upper wall surface shearing force point
Cloth scope is wider, and boundary shear stress with respect to suction surface rearward, three pressure face concave point groups is provided with pressure face leading edge, weakens viscous
Contact of the property blood with wall, and then the viscous friction of blood and wall on pressure face is reduced, improve on blade pressure surface
Flow regime.It can be seen that, two suction surface concave point groups and three pressure face concave point groups are to causing the damaged wall of haemocyte in blood
The distribution of face shearing force is improved, and improves vortex, suppresses the generation of large scale vortex, in advance by the vortex of non-mature
Small size vortex is broken into, is flowed for improving, weakens stress complexity of the haemocyte in flowing, is broken for reduction haemocyte
Damage most important.
The blood of flowing mechanical energy in the leaf road of impeller is continuously increased, and front hub is located at the front-wheel of the impeller leaf road port of export
Hub winglet 5-A and rear-wheel hub be located at the impeller leaf road port of export two rear-wheel hub winglet 5-B control due to fluid pressure and
Radial Flow caused by centrifugal force is uneven, while also controlling the size in a pair of channels whirlpool in blade passage, is also just controlled
The Secondary Flow of radial motion, reduces the uneven of speed, reduces jet Trailing Edge Loss, it is suppressed that the vortices breakdown and stream of leaf road tail end
Dynamic be lost simultaneously controls vortex shedding, and then controls the larger blood of the viscosity boundary layer thickness of bottom surface and whirlpool on leaf road to come off
Frequency, is cut to big Passage Vortex, is combed into countless small vortex, and the viscous fluid in runner is effectively separated,
It is oriented to, reduces Trailing Edge Loss and eddy current crack.
Centrifugal action through impeller, impeller is rotated out of by blood.Blood travels further into spiral case, and the spiral case of variable cross-section is now
The effect of vaneless diffuser is act as, the part kinetic energy in blood is further converted to potential energy, then exported by volute outlet.
Claims (4)
1. the Minitype centrifugal blood pump that a kind of anti-haemocyte is damaged, including drive end bearing bracket, rear end cap and impeller；Impeller and drive end bearing bracket,
Rear end cap is coaxial, is driven by motor；It is characterized in that：Blade suction surface leading edge on impeller is provided with along vane type line spacing b2 cloth
The two suction surface concave point groups put, b2 be blade along along molded line direction height average 15%~18%；Described suction surface is recessed
Point group includes five suction surface concave points along the straight line parallel with blade inlet edge inclination angle；Blade inlet edge inclination angle be 20 °~
30°；Blade inlet edge to any one suction surface concave point distance all in the range of the 5%~15% of vane type line length；Suction surface
Concave point diametrically D hemispherical, D values are the 5%~10% of blade average thickness；Adjacent suction face is recessed in suction surface concave point group
Point centre-to-centre spacing for blade along along molded line direction height average 14%~16%, the suction surface concave point group nearer from blade inlet edge
The suction surface concave point in interior centre position is centrally located at the half height and position of blade height average along along molded line direction；Before blade
The suction surface concave point centre-height in centre position is more recessed than the suction surface nearer from blade inlet edge in the suction surface concave point group of edge farther out
The suction surface concave point centre-height in centre position is high in point group, difference be blade along along molded line direction height average 10%~
14%；
Blade pressure surface leading edge on impeller is provided with the three pressure face concave point groups arranged along vane type line spacing, blade inlet edge with
The spacing of the pressure face concave point group nearest from blade inlet edge be blade along along molded line direction height average 4%~6%, from blade
The spacing of the nearest pressure face concave point group of leading edge and intermediate pressure face concave point group is blade height average along along molded line direction
14%~16%, the spacing of intermediate pressure face concave point group and the pressure face concave point group farthest from blade inlet edge is blade along molded line side
The 9%~11% of upward height average；Described pressure face concave point group is included along the straight line parallel with blade inlet edge inclination angle
Five pressure face concave points；Blade inlet edge to any one pressure face concave point distance all the 5%~30% of vane type line length
In the range of；Pressure face concave point diametrically D hemispherical；The centre-to-centre spacing of adjacent pressure face concave point is blade edge in pressure face concave point group
The 14%~16% of height average on molded line direction；The pressure face concave point in centre position is centrally located at leaf in each pressure face concave point group
45% height and position of piece height average along along molded line direction；
Front hub is located at the impeller leaf road port of export and is provided with front hub winglet, and rear-wheel hub is located at the impeller leaf road port of export and is provided with after two
Wheel hub winglet；Leaf road port of export camber line is divided into bisection by the trailing edge of front hub winglet, and the trailing edges of two rear-wheel hub winglets is by leaf
Road port of export camber line is divided into trisection；The thickness of front hub winglet and rear-wheel hub winglet is the 20%~30% of vane thickness；
The angle of outlet of front hub winglet and rear-wheel hub winglet is equal with outlet blade angle；The leading edge of front hub winglet and the folder of impeller axis
Angle is 10 °~40 °, and the angle of the small nose of wing of rear-wheel hub and impeller axis is 7 °~30 °；The molded line length of front hub winglet is leaf
The 10% of piece molded line length, the molded line length of rear-wheel hub winglet is the 15% of vane type line length, front hub winglet and rear-wheel hub
The height of winglet is H, H values be blade along along molded line direction height average 5%~10%.
2. the Minitype centrifugal blood pump that a kind of anti-haemocyte according to claim 1 is damaged, it is characterised in that：Before described
Pad is set between end cap and rear end cap, and drive end bearing bracket and rear end cap are bolted.
3. the Minitype centrifugal blood pump that a kind of anti-haemocyte according to claim 1 is damaged, it is characterised in that：Described leaf
5~8 blades being evenly distributed are had on wheel.
4. the circulation blood supply method for the Minitype centrifugal blood pump that a kind of anti-haemocyte according to claim 1 is damaged, it is special
Levy and be：This method is as follows：Blood is entered by the import of drive end bearing bracket, and mechanical energy is converted into the machinery of blood by the blade of impeller
Energy；Two suction surface concave point groups of blade suction surface leading edge and three pressure face concave point groups of pressure face leading edge reduce haemocyte
Stress complexity in flowing, it is specific as follows：Two suction surface concave point groups of blade suction surface leading edge cause local edge interlayer
Change so that tough blood can depart from blade surface, reduce the boundary layer thickness on suction surface；Boundary shear stress exists
Pressure face is different with the distribution on suction surface, is distributed in the boundary shear stress Extreme maximum distribution of suction surface leading edge in blade type line length
In the range of the 5%~15% of degree, the boundary shear stress Extreme maximum distribution of pressure face leading edge is the 5%~30% of vane type line length
In the range of, and because pressure face upper wall surface shearing force distribution it is wider, boundary shear stress with respect to suction surface rearward, in pressure face
Leading edge is provided with three pressure face concave point groups, weakens contact of the sticky blood with wall, so reduce on pressure face blood with
The viscous friction of wall, improves the flow regime on blade pressure surface；
The blood of flowing mechanical energy in the leaf road of impeller is continuously increased, and the front hub that front hub is located at the impeller leaf road port of export is small
Two rear-wheel hub winglets that the wing and rear-wheel hub are located at the impeller leaf road port of export are controlled because the pressure and centrifugal force of fluid are uneven
Radial Flow caused by weighing apparatus, while also controlling the size in a pair of channels whirlpool in blade passage, has also just controlled radial motion
Secondary Flow, 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 processed, and then tough the blood boundary layer thickness of bottom surface and shedding frequence in whirlpool on leaf road are controlled, to big
Passage Vortex is cut, is combed into small vortex, and the blood in runner is separated, is oriented to, and reduces Trailing Edge Loss and vortex
Noise；
Centrifugal action through impeller, impeller is rotated out of by blood；Blood travels further into spiral case, and the spiral case of variable cross-section serves as no leaf
The effect of diffuser, is further converted to potential energy by the part kinetic energy in blood, is then exported by volute outlet.
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| CN111249551A (en) * | 2020-01-21 | 2020-06-09 | 深圳汉诺医疗科技有限公司 | Worm type pump head for artificial heart, artificial heart pump and ECMO equipment |
| CN112156255A (en) * | 2020-10-14 | 2021-01-01 | 北京航空航天大学 | Magnetic suspension centrifugal blood pump with integrated extracorporeal circulation magnetic wheel |
| CN114282327A (en) * | 2022-03-08 | 2022-04-05 | 中国空气动力研究与发展中心计算空气动力研究所 | Vortex generator cavity design method for efficiently promoting transition and vortex generator |
| CN114736797A (en) * | 2022-03-30 | 2022-07-12 | 昆明柏特生物科技有限公司 | Cell culture reactor |
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