CN107596468A - A kind of centrifugal heart impeller of pump - Google Patents
A kind of centrifugal heart impeller of pump Download PDFInfo
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- CN107596468A CN107596468A CN201710974092.7A CN201710974092A CN107596468A CN 107596468 A CN107596468 A CN 107596468A CN 201710974092 A CN201710974092 A CN 201710974092A CN 107596468 A CN107596468 A CN 107596468A
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- impeller
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- heart
- circular flow
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Abstract
The invention discloses a kind of centrifugal heart impeller of pump, using closed type structure, blade is distributed 4 ~ 6 circular flow channels for the Central Symmetry of non-conventional design, and each area of section inside runner is equal, and blade inlet and outlet laying angle is respectively 20 °~30 ° and 25 °~40 °；When the advantage is that impeller carries out work done to blood, the blood rbc in circular flow channel will not be destroyed, and effectively reduce red blood cell breakage rate；It is very smooth using the circular flow channel surface of engineering material, substantially reduce the friction loss between impeller and blood, blood heat change will not be affected greatly, improve the heart efficiency of pump, the energy of driving needed for reducing, the safety and reliability of centrifugal heart pump is improved, can be applied to heart pump.
Description
Technical field
The invention belongs to heart pump design and manufacturing field, what is mainly solved is the safe and reliable work problem of heart pump, more
Specifically, the present invention relates to a kind of impeller of the centrifugal heart pump of magnetically-actuated, it is vane type heart impeller of pump
It is a kind of.
Background technology
Heart failure is the severe stage of various heart disease development, directly threatens the life of patient.According to world health group
Investigation is knitted, global heart failure patient is increased with annual 50000000 person-times of surprising speed.Due to the deficiency of donor, only 5% energy
Receive heart transplant operation, most patients need circulatory assit equipment to sustain life, and are supplied until searching out suitable heart
Body.
Artificial heart, i.e., the pump blood function of heart is partially or completely substituted with bio-mechanical means, maintain the blood of whole body
Circulation.It has ventricle auxiliary blood pump by function division（VAD）And TAH（TAH）Two kinds, artificial heart transplanting is one kind
The means of heart failure are treated, are the effective alternative solutions of cardiac transplantation.
Impeller is the core component of artificial heart, and the quality of its performance directly affects the safe efficient and reliable of heart pump
Property operation.Vane type heart pump is rotated in the housing by impeller, and energy is transmitted to liquid by the change of hydrokinetic parameter
The machinery of body, is divided into three kinds of centrifugal pump, axial-flow pump and mixed-flow pump forms, and vane type heart pump is increasingly becoming VAD main flow.
The advantages of vane type heart pump is：Structure is relatively simple, small volume, is easily implantable；It is small with contacting blood area, resist
Thrombus performance is good；Because implantable, infection problems also can obtain preferable solution；Good endurance；Low-power consumption；It is easily operated；Price compared with
It is low.The problem of temperature problem of vane type heart pump course of work middle (center) bearing and sealing be also influence one of component life because
Element, how to keep not allowing thrombosis and development in the blood pump design phase, be the aspect that emphasis considers when heart pump manufactures and designs.
Rotation causes the attention of people to the mechanical damage caused by red blood cell to blade at a high speed, but blood present in pump rotary course
Bolt, heating etc. limit its development, so far also without good solution.Therefore, heart pump reliably working is being ensured
In the case of, it is the inevitable requirement studied from now on to improve its antithrombus formation and hematoclasis is minimized.
The content of the invention
It is an object of the invention to provide a kind of centrifugal heart impeller of pump, to reduce such vane type heart pump to red thin
The destruction of born of the same parents, make its structure formed.
To achieve these goals, the technical scheme that the present invention takes is as follows：
A kind of centrifugal heart impeller of pump provided by the present invention, including front and rear cover plate, wheel hub and hub centre, for installing water
The impeller bore of impeller of pump, along the circumferencial direction of impeller, it is additionally provided with multiple uniform, shape identical circular flow channels and for heart
Pump impeller shaft is to the boss being set to；Axial distance between the circular flow channel and front shroud of impeller, back shroud of impeller for 0.5 ~
1.5mm；Central Symmetry is distributed 4 ~ 6 circular flow channels between the impeller front and rear cover plate；The impeller rotates along axis projection
Section shape is centrifugal；On the section, described circular flow channel meets that each cross-sectional area is constant；Described circular flow channel
Camber line is inlet blade angle in the angle of the radius on impeller inlet side, i.e.,β 1；Described circular flow channel positioned at impeller with going out
The angle that the tangent line at the top of mouth circumference is mutually formed is outlet blade angle, it is characterised in that：Describedβ 1For 20 °~30 °；It is described
'sβ 2For 25 °~40 °；The camber line of the circular flow channel is one section of circular arc.
Research has shown that the principal element of Blood damage comes from turbulence shear stress, and turbulence shear stress is by destroying red blood cell
Film, hemoglobin in red blood cell is set to dissociate into blood plasma, so as to haemolysis occur.The present invention uses above-mentioned technical proposal so that circle
Shape runner uses inlet blade angle the most rational and outlet blade angle, on the one hand improves the waterpower effect of centrifugal heart pump
Rate, that is, save the energy required for magnetically-actuated；Impeller uses circular flow channel, reduces common blade and red blood cell is broken
It is bad, reduce erythrocyte hemolysis；Using rational blade quantity, the operating efficiency of centrifugal heart pump is further improved；Impeller
Material be engineering plastics PPO, reduce the weight of heart pump, reduce rotary inertia when heart pump runs at high speed and shake
It is dynamic.
Describedβ 1For 20 ° ~ 25 °；Describedβ 2For 35 °~40 °.Furtherly, it is describedβ 1It is described for 22 °β 2
For 35 °.The area of the circular flow channel inlet and outlet of centrifugal heart impeller of pump of the present invention ensures equally big；Described
The quantity of impeller channel is 4 ~ 6, and furtherly, the quantity of described impeller channel is 5；The centrifugal heart impeller of pump
For overall structure, material uses engineering plastics PPO.
The present invention has beneficial effect.Impeller of the present invention can reduce turbulent generation, speed triangle table at blade exit
Bright, the change of circular flow channel absolute velocity size is smaller than vane type.Suitable speed triangle is selected, Hemodynamic environment can be made
Degree only changes direction while impeller periodically-varied rotating speed produces pulsating flow, does not change size.By using circular flow channel,
The unexpected acceleration and deceleration of haemocyte can be avoided, so as to avoid the breakage of cell, turbulent flow is reduced to minimum.Engineering plastics
PPO is harmless, and impeller can operate in human body for a long time.
Brief description of the drawings
The content expressed by each width accompanying drawing of this specification and the mark in figure are briefly described below：
Accompanying drawing 1 provides the diagrammatic cross-section of centrifugal heart impeller of pump of the present invention；
Accompanying drawing 2 provides the schematic diagram of centrifugal heart pump impeller outlet position of the present invention；
Accompanying drawing 3 provides the schematic diagram of centrifugal heart pump impeller shaft face projection of the present invention；
Accompanying drawing 4 provides schematic diagram of the centrifugal heart impeller of pump of the present invention from impeller bore locality
Mark in above-mentioned each figure is respectively：
1st, impeller, 2, front shroud of impeller, 3, back shroud of impeller, 4, circular flow channel, 5, impeller bore, 6, boss, 7, blade inlet
Angle, 8, outlet blade angle.
Embodiment
Below against accompanying drawing, by the description to embodiment, each component for example involved to the embodiment of the present invention
The effect and operation principle of mutual alignment and annexation, each several part between shape, construction, each several part, manufacturing process and behaviour
Make application method etc., be described in further detail, to help those skilled in the art to inventive concept of the invention, skill
Art scheme has more complete, accurate and deep understanding.
As shown in Figure 1, Figure 2, the structure of the invention expressed by Fig. 3 and Fig. 4, the present invention is a kind of centrifugal heart impeller of pump 1,
Including front shroud of impeller 2, back shroud 3, circular flow channel 4, the impeller bore 5 for installing heart impeller of pump 1 and for heart pump leaf
Take turns the boss 6 of 1 axially position；Axial distance z between the circular flow channel 4 and front shroud of impeller 2, back shroud of impeller 3 is 0.5
~1.5mm；Central Symmetry is distributed the blade that 4 ~ 6 circular flow channels 4 are impeller 1 between the impeller front and rear cover plate；The impeller 1
It is centrifugal along axis projection's rotation section shape；On the section, described circular flow channel 4 meets each cross-sectional area not
Become；The camber line of described circular flow channel 4 is inlet blade angle 7 in the angle of the radius of the inlet side of impeller 1, i.e.,β 1；It is described
The angle that is mutually formed of tangent line at top of the circular flow channel 4 with exporting circumference positioned at impeller 1 be outlet blade angle 8, i.e.,β 2；It is described
The camber line of circular flow channel 4 is one section of circular arc.Still as shown in figure 1, shape of the blade on the axis vertical cross section with heart impeller of pump 1
Shape is one section of circular arc；The protrusion direction of blade camber line is consistent with the direction of rotation of impeller 1.It is tired in manufacturing process in order to reduce
Difficulty, suppress destruction of the heart impeller of pump during blood is conveyed to red blood cell, blade design is in the arc-shaped, makes centrifugal force to blood
The effect of liquid acting is more preferable.
In order to solve the problems, such as in presently, there are described in background section and overcome its defect, realize and improve heart pump
Impeller to blood course of conveying efficiently, the effect of safety and its structure is tended to the goal of the invention of microminiature, what the present invention took
Technical scheme is：
As shown in figure 1, heart impeller of pump 1 provided by the present invention, described inlet blade angleβ 17 and outlet blade angleβ 2（8）
Span be：Describedβ 1For 20 °~30 °；Describedβ 2For 25 °~40 °.
Above-mentioned technical proposal, in the premise of the physical dimensions such as the heart pump impeller outer diameter described without increase, exit width
Under, by the described inlet blade angle for changing described heart impeller of pumpβ 1And inlet blade angleβ 2, to improve heart impeller of pump
Operating efficiency, on the premise of physical dimension and structural complexity is not increased, improve the conveying effect of heart pump.
Here is to described inlet blade angleβ 17 and described outlet blade angleβ 28 further analysis：
When described inlet blade angleβ 1When larger, the caused angle of attack is larger when blood enters described impeller, now can be right
The destruction aggravation of red blood cell in blood；When described inlet blade angleβ 1When smaller, the stream of the porch of described impeller can be made
Fast excessive, the shear force of impeller surface when blood enters impeller, easily forms low pressure, institute at described impeller inlet 9
Destroyed with easily causing the cavitation and cavitation erosion of impeller to produce cavitation to red blood cell in blood.
Described outlet blade angleβ 2The lift, power and efficiency of heart impeller of pump 1 are directly affected, institute if desired
When the heart impeller of pump lift stated is higher, i.e., use larger outlet angle when heart pump impeller outlet pressure requirements are larger, but this
The Shi Suoshu direct stator-rotor interaction of heart impeller of pump and stationary parts is strengthened, and easily causes the breakage of a part of red blood cell；Root
According to experience and the result of experiment, with reference to different use condition and structure, selected in the range of 25 °~40 °.
The present invention sums up following according to obtained data are testedβ 1Withβ 2Value, exist for those skilled in the art
Application is selected when implementing of the invention：Describedβ 1For 20 °~30 °；Describedβ 2For 25 °~40 °.β 1Withβ 2The group that can be selected
Closing example includes：
β 1=22 °,β 2=35°；
β 1=25 °,β 2=30°；
β 1=28 °,β 2=35°；
β 1=30 °,β 2=35°；
β 1=30 °,β 2=40°。
Further illustrate, it is describedβ 1It is described for 22 °β 2For 35 ° when, the performance requirements of different operating modes can be met, this
The efficiency highest of the impeller of combination, it is a kind of preferably assembled scheme.
Axial distance between the front shroud 2 and back shroud 3 and circular flow channel of heart impeller of pump 1 of the present invention is：
0.5~1.5mm.Optimal, side when axial distance is 0.5mm is obtained by impeller intensity calculation formula and finite element analysis software
Face can reduce the weight of heart impeller of pump, improve traveling comfort；On the other hand rotary inertia can be reduced, reduce heart
Installation dimension inside pump, effective control cost.
The section of circular flow channel 4 of the present invention is constant, i.e., the constant area in each section, and this design is effectively ensured
Divergence loss of the blood in heart impeller of pump, improve the efficiency of heart pump complete machine.
Water pump vane of the present invention uses engineering plastics PPO, its purpose using overall manufacture structure, its material
It is on the premise of the intensity of blade is ensured, reduces the weight of heart pump, reduce rotary inertia when heart pump runs at high speed
And vibration.
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is employed, or without changing
Enter and the design of the present invention and technical scheme are directly applied into other occasions, within protection scope of the present invention.
Claims (7)
1. a kind of centrifugal heart impeller of pump, impeller（1）For closed type structure, including impeller（1）, front shroud of impeller（2）, back shroud
（3）, circular flow channel（4）, for installing impeller（1）Impeller bore（5）With for impeller（1）The boss of axially position（6）, it is special
Sign is：The circular flow channel（4）And front shroud of impeller（2）, back shroud of impeller（3）Between axial distance z for 0.5 ~
1.5mm；It is impeller that Central Symmetry, which is distributed 4 ~ 6 circular flow channels, between the impeller front and rear cover plate（1）Blade；The impeller
（1）It is centrifugal along axis projection's rotation section shape, on the section, described circular flow channel meets each cross-sectional area not
Become；The camber line of described circular flow channel is in impeller（1）The angle of the radius of inlet side is inlet blade angleβ 1（7）；It is described
Circular flow channel and be located at impeller（1）The angle that the tangent line at the top of outlet circumference is mutually formed is outlet blade angleβ 2（8）；It is described
'sβ 1It is described for 20 °~30 °β 2For 25 °~40 °；The circular flow channel（4）Camber line be one section of circular arc.
A kind of 2. centrifugal heart impeller of pump according to claim 1, it is characterised in that：β 1For 22 °；Describedβ 2For
35°。
A kind of 3. centrifugal heart impeller of pump according to claim 1, it is characterised in that：The impeller（1）Circular stream
Road（4）The area of inlet and outlet ensures equally big.
A kind of 4. centrifugal heart impeller of pump according to claim 1, it is characterised in that：The impeller（1）The number of runner
Measure as 5.
A kind of 5. centrifugal heart impeller of pump according to claim 1, it is characterised in that：The circular flow channel（4）And leaf
Wheel（1）Front shroud（2）, back shroud（3）Between axial distance be that z is 0.5mm.
A kind of 6. centrifugal heart impeller of pump according to claim 1, it is characterised in that：The impeller（1）For overall knot
Structure, material use engineering plastics PPO.
A kind of 7. centrifugal heart impeller of pump according to claim 1, it is characterised in that：The boss（6）With the leaf
Wheel bore（5）Between radial distance be 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710974092.7A CN107596468A (en) | 2017-10-19 | 2017-10-19 | A kind of centrifugal heart impeller of pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710974092.7A CN107596468A (en) | 2017-10-19 | 2017-10-19 | A kind of centrifugal heart impeller of pump |
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| Publication Number | Publication Date |
|---|---|
| CN107596468A true CN107596468A (en) | 2018-01-19 |
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ID=61077456
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710974092.7A Pending CN107596468A (en) | 2017-10-19 | 2017-10-19 | A kind of centrifugal heart impeller of pump |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110321660A (en) * | 2019-07-16 | 2019-10-11 | 重庆水轮机厂有限责任公司 | A kind of large-scale mixed-flow pump impeller design method of radial water outlet |
| CN110665078A (en) * | 2019-10-31 | 2020-01-10 | 北京清科博动科技有限公司 | Centrifugal heart pump with low hemolysis rate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3173108A1 (en) * | 2015-11-30 | 2017-05-31 | Fundacja Rozwoju Kardiochirurgii Im. Prof. Zbigniewa Religi | Impeller with closed channels for a centrifugal implantable ventricular assist pump |
-
2017
- 2017-10-19 CN CN201710974092.7A patent/CN107596468A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3173108A1 (en) * | 2015-11-30 | 2017-05-31 | Fundacja Rozwoju Kardiochirurgii Im. Prof. Zbigniewa Religi | Impeller with closed channels for a centrifugal implantable ventricular assist pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110321660A (en) * | 2019-07-16 | 2019-10-11 | 重庆水轮机厂有限责任公司 | A kind of large-scale mixed-flow pump impeller design method of radial water outlet |
| CN110665078A (en) * | 2019-10-31 | 2020-01-10 | 北京清科博动科技有限公司 | Centrifugal heart pump with low hemolysis rate |
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