CN101590295B - Self-adjusting rotor used for conveying blood or conveying shear sensitive fluid - Google Patents
Self-adjusting rotor used for conveying blood or conveying shear sensitive fluid Download PDFInfo
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- CN101590295B CN101590295B CN2009101461288A CN200910146128A CN101590295B CN 101590295 B CN101590295 B CN 101590295B CN 2009101461288 A CN2009101461288 A CN 2009101461288A CN 200910146128 A CN200910146128 A CN 200910146128A CN 101590295 B CN101590295 B CN 101590295B
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Abstract
The invention relates to a self-adjusting rotor used for conveying blood or conveying shear sensitive fluid. The rotor rotates in a pump body so that the pressure of the fluid is increased and the fluid flows out along the circumferential direction relative to the flowing direction of a medium, the flowing direction comprises an incident flow face (3) and a back flow face (4), and an upper end face and a lower end face of the rotor are an upper oblique plane and a lower oblique plane; if the rotor is cut along a central axis, an included angle formed by an intersecting line of the upper oblique plane and a section and a rotary horizontal plane is an upper top angle beta, and the beta is more than 0 degree; an included angle formed by an intersecting line of the lower oblique plane and the section and the rotary horizontal plane is a lower bottom angle alpha, and the alpha is more than or equal to 0 degree; the number of the rotors is even, and the rotors are symmetrically distributed along a rotating shaft; and rotor clearances are formed between the upper end face and the lower end face of the rotor and the pump body, the rotor clearances are the distances from each point on the upper end face and the lower end face to the inner surface of the corresponding pump body, and the rotor clearances from the incident flow face to the back flow face are reduced progressively. The self-adjusting rotor has extremely high self-balancing and self-adjusting properties. When the self-adjusting rotor is applied to an artificial heart, the rotor can reduce the damage to blood corpuscles, improve the compatibility with the blood, and lower the manufacturing cost.
Description
Technical field
The invention belongs to the biomedical engineering technology field, be specifically related to be used for the artificial heart blood transport or be used for other rotor contactless, the no bearing of the fluidic conveying of shear-sensitive.
Background technology
In recent years; Along with the modern medical service technology rapid development; Propose higher requirement for the research and development of medical equipment, how to design and develop efficiently, reliable, the medical equipment of new generation that meets the ergonomic biological requirement is the key subjects that each researcher faces.For pumping blood or other to shear sensitive liquid, the researcher of cardiovascular medical instruments field constantly improves and makes that blood pump housing volume is little, work is more reliable, reduces as much as possible the pumped (conveying) medium deleterious impact.
Rotary blood pump is existing certain application in the operation on heart treatment, can partly or entirely substitute human heart blood supply function, as: heart-assist device.Common is centrifugal blood pump, is about to blade and is contained on the axle, when the axle high speed rotating; These blade pass are crossed guide blood and are changed the pressure that its direction of motion increases blood; Blade will form arterial pressure to the dynamic action of blood, and such heart-assist device has been applied to clinical.Because it is better that centrifugal blood pump and other form blood pump are compared blood compatibility, in recent years, obtains using more widely.Yet, there is bearing to exist in the general blood pump rotor structure, Figure of description Fig. 3 is a U.S. Biomedicus centrifugal blood pump; Be provided with radial ball bearing in this device, the shearing force that during its rotation blood is produced is big, and is destructive strong; Friction generates is arranged simultaneously, possibly cause the formation of thrombosis.
In the design of in recent years blood pump, for the magnetic levitation technology that reduces to rub is applied to blood pump, blade leans on magnetic levitation in pump, need not to support, and has avoided the friction between the blade and the pump housing, reduces the generation of thrombosis.But need a series of control electronics and pick off on its structure, increased the weight of, strengthened the weight and the size of artificial heart.Simultaneously, owing to set up electronic equipment, cause more unsafe factors.
The artificial heart blood pump of invention disclosed patent application CN100382855C is a kind of complete artificial heart pump that adopts the bearing free, engine free and axle free of magnetic suspension mode in addition; This type artificial heart as stated; The structure processing cost is high; Actuating coil need be controlled impeller respectively to stressed with pick off, and functional reliability is relatively poor.
Summary of the invention
In order to improve existing artificial heart prior art complex structure, manufacturing cost is high, to the deficiency of blood cutting damage blood mechanism, the objective of the invention is to propose a kind of rotor rational in infrastructure design; It had both satisfied the use in the clinical treatment; Reduce the destruction to hemocyte, the compatibility of improvement and blood reduces manufacturing cost; And have high self-balancing and self regulating charactoristic, can be used for the artificial heart blood transport or be used for other the shear-sensitive FLUID TRANSPORTATION.
For the technical scheme that reaches goal of the invention the present invention employing is:
A kind ofly be used for blood transport or to the self-adjusting rotor of shear-sensitive FLUID TRANSPORTATION; Said rotor is at pump housing internal rotation; Fluid pressurized is along the circumferential direction flowed out, it is characterized in that the direction of relative media flow, comprise fluoran stream surface and lee side; Said fluoran stream surface is meant the one side of forward media flow, and said lee side is meant the one side of media flow dorsad; The both ends of the surface up and down of rotor are ramp and lower inclined plane; Suppose after central shaft cutting, the intersection in ramp and cross section with the formed angle of rotation horizontal plane be on end face angle β, β＞0 °; The intersection in lower inclined plane and cross section is bottom surface angle α with rotation horizontal plane formed angle, α >=0 °; The quantity of rotor is necessary for even number, and rotor distributes along the centre rotational axis axial symmetry;
Rotor up and down forms rotor clearance between both ends of the surface and the pump housing, and said rotor clearance is meant up and down both ends of the surface, and each puts the distance of corresponding pump housing inner surface, and the rotor clearance from the fluoran stream surface to the lee side successively decreases.
The both ends of the surface up and down of rotor of the present invention are equipped with the design of two inclined planes, and have a certain degree with the relative flow direction shape of blood, simultaneously; Form certain interval between the both ends of the surface and the pump housing up and down, the rotor clearance from the fluoran stream surface to the lee side is when successively decreasing, and rotor places the supercharging of artificial heart shell internal rotation; Can regulate the active force of each direction of motion in blood flow automatically during through rotor, make rotor keep poised state, need not bearing; Contactless between rotor and the shell, there is not friction.
The angle of said bottom surface angle for limiting has a significant effect, following bottom surface corner α=10 ° ± 10 °.
Same, when last end face angle β=40 ° ± 20, have the self-balancing high stability.
Especially be 20 μ m～100 μ m at rotor clearance, patent of the present invention can be showed more excellent stability characteristic (quality).
Compare the blood pump systems of prior art, the rotor provided by the invention and the blood pump housing, its beneficial effect is:
(1) compare as the blood pump of driving force with utilizing magnetic levitation technology, regulate automatically because of adopting dynamic pressure, need not any additional control appliance, cost is cheaper, control more simply, also safer, and processing and manufacturing is more easy.
(2) compare with other axial flow type blood pump, under the condition of same conveying blood pressure, this programme only needs the rotating speed of axial blood pump about 1/4; Therefore, have stability and reliability efficiently, the axle that needs bearing and connect rotor; Contactless; Do not have friction, reduced the destructiveness of rotor effectively, greatly improved the blood compatibility and the dynamics of artificial heart hemocyte;
(3) volume is little, and is in light weight, can be used as the type artificial heart that implants.
Figure of description
Fig. 1 rotor ZY of the present invention structure stress analysis chart.
The A-A sectional view of Fig. 2 the present invention rotor shown in Figure 1.
Fig. 3 U.S. Biomedicus centrifugal pump structure sketch map.
The graph of relation in lift and gap in Fig. 4 structure of the present invention.
Fig. 5 is applied to the sketch map of blood pump for rotor of the present invention.
Wherein: 1, ramp, 2, lower inclined plane, 3, the rotor fluoran stream surface, 4, the rotor lee side; 5, rotor, 6, stator, 7, fluid, 8, rotor magnetic steel; 9, coil of stator of motor, 10, motor housing, 11, blood stream outlet, 12, the blood flow inlet; 13, blood pump shell, 14, radial ball bearing, 15, axial thrust bearing.
The specific embodiment
Come the present invention is further specified below in conjunction with specific embodiment, but do not limit the invention to these specific embodiment.One skilled in the art would recognize that the present invention contained in claims scope all alternatives, improvement project and the equivalents that possibly comprise.
Like Fig. 1,2,4 and automatic adjustable type rotor shown in Figure 5, can be used for blood transport or other pump housing to the shear-sensitive FLUID TRANSPORTATION, a N rotor is symmetrically placed in the housing; Along Z axle rotation, rotor radially be the Y direction, the fluid of conveying is roughly along the circumferential direction mobile in a housing; See Fig. 2, the direction of media flow comprises fluoran stream surface 3 and lee side 4 relatively; Fluoran stream surface is meant the one side of forward media flow, and lee side is meant the one side of media flow dorsad.
Between fluoran stream surface and the lee side folded rotor up and down both ends of the surface be ramp and lower inclined plane, suppose that after the central shaft cutting intersection L1 in ramp and cross section is last end face angle β with rotating the formed angle of horizontal plane; β＞0 °; The intersection L2 in lower inclined plane and cross section is bottom surface angle α with rotation horizontal plane formed angle, and α >=0 ° it should be noted that lower inclined plane is not to be meant that the certain and horizontal plane of L2 has angle; During α when parallel=0 °, also can accomplish the present invention.α is 10 ° in the present embodiment, and β is 40 °.
Rotor up and down forms rotor clearance δ between both ends of the surface and the pump housing, and rotor clearance is meant up and down both ends of the surface, and each puts the distance of corresponding pump housing inner surface, and the rotor clearance from the fluoran stream surface to the lee side successively decreases.
As shown in Figure 2, suppose that behind the circumferencial direction cutting rotor of rotor in the cross section that rotor is cut, the intersection of facet and fluoran stream surface is L3, the intersection of facet and ramp is L4, the intersection point of L3 and L4 is δ to the distance of pump housing inside upper surface "
1, the intersection of facet and fluoran stream surface is L5, the intersection point of L5 and L4 is δ to the distance of pump housing inside upper surface "
2, δ "
1＞δ "
2The intersection of face and lower inclined plane is L6, and the intersection point of L3 and L6 is δ ' to the distance of the inboard lower surface of the pump housing
1, the intersection point of L5 and L6 is δ ' to the distance of the inboard lower surface of the pump housing
2, δ '
1＞δ '
2
In the present embodiment, δ "
1=δ '
1=60 μ m, δ "
2=δ '
2=20 μ m.
At the ramp 1 and lower inclined plane 2 of rotor, the longshore current body direction of motion, 4 are respectively equipped with symmetrical inclined-plane from fluoran stream surface 3 to lee side; Realize that rotor design principle of the present invention is shown in the rotor ZY generalized section of Figure of description Fig. 1 from axial self-balancing, the quantity of rotor is even number; Rotor distributes along the Z axial symmetry; Because the design of symmetrical structure, can cancel out each other in that the y direction of rotor radius direction upper rotor part I and rotor II is stressed, reach balance; The stressed component by α and β of z direction reaches balance.Blade A-A cross section force diagram is as shown in Figure 2, and when rotor rotates, rotor will be made move toward one another with respect to medium fluid, and medium fluid is respectively f to the end face of rotor and the active force of bottom surface
tAnd f
b,, in cartesian coordinate system, it can be decomposed into the component f on the horizontal x direction respectively according to the newtonian motion mechanics principle
TxAnd f
BxWith the component f on the vertical z direction
TzAnd f
BzBecause the symmetric design and the in the vertical direction component f of rotor
TzAnd f
BzAnd satisfy the curve linear relationship shown in Figure 4 between the gap delta respectively like Figure of description, therefore, at two power f
TzAnd f
BzThe effect lower rotor part can keep the automatic adjusting of its relative position on Z-direction through the dynamic equilibrium between this two power, adopt this dynamic pressure to regulate automatically, need not any additional control device.Adopt this dynamic pressure to regulate automatically, need not any additional control device.On the other hand, f as shown in Figure 1
tAnd f
bComponent f
ItyAnd f
IbyAnd f
IItyAnd f
IIbyMake rotor keep balance along Z axle center, its structure has improved the stability and the reliability of its operation.
See shown in Figure 5; Rotor is at blood pump shell 13 internal rotation, and the blood that needs to carry gets into from pump housing blood flow inlet 12, the rotor rotation; Blood pressurization back is exported from blood stream outlet 11; This type blood pump can be inserted human heart, perhaps replaces the pumping function of human heart fully, embeds in the intravital aorta of people.
Different with embodiment 1 is, present embodiment α is 20 °, and β is 20 °, δ "
1=20 μ m, δ '
1=20 μ m, δ "
2=10 μ m, δ '
2=5 μ m, last lower inclined plane are an oblique plane.
Different with embodiment 1 is, present embodiment α is 0 °, and β is 60 °, δ "
1=100, δ '
1=20 μ m, δ "
2=50 μ m, δ '
2=10 μ m, last lower inclined plane are an oblique curved surface.
Claims (4)
1. self-adjusting rotor that is used for the shear-sensitive FLUID TRANSPORTATION; Said rotor along the circumferential direction flows out fluid pressurized at pump housing internal rotation, it is characterized in that said self-adjusting rotor need not bearing; The relative mobile direction of fluid; This self-adjusting rotor comprises fluoran stream surface (3) and lee side (4), and said fluoran stream surface is meant the one side of positive flow of fluid, and said lee side is meant the one side of fluid flow dorsad; The both ends of the surface up and down of rotor are ramp and lower inclined plane; Suppose after central shaft cutting, the intersection in ramp and cross section with the formed angle of rotation horizontal plane be on end face angle β, β＞0 °; The intersection in lower inclined plane and cross section is bottom surface angle α with rotation horizontal plane formed angle, α >=0 °; The quantity of rotor is even number, and rotor is symmetrically distributed along rotating shaft;
Rotor up and down forms rotor clearance between both ends of the surface and the pump housing, and said rotor clearance is meant up and down both ends of the surface, and each puts the distance of corresponding pump housing inner surface, and the rotor clearance from the fluoran stream surface to the lee side successively decreases.
2. according to the said self-adjusting rotor that is used for the shear-sensitive FLUID TRANSPORTATION of claim 1, it is characterized in that: said bottom surface angle α=10 ° ± 10 °.
3. according to the said self-adjusting rotor that is used for the shear-sensitive FLUID TRANSPORTATION of claim 2, it is characterized in that: the said end face angle β of going up=40 ° ± 20 °.
4. according to the said self-adjusting rotor that is used for the shear-sensitive FLUID TRANSPORTATION of one of claim 1-3, it is characterized in that: rotor clearance is 20 μ m～100 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101461288A CN101590295B (en) | 2009-01-19 | 2009-06-08 | Self-adjusting rotor used for conveying blood or conveying shear sensitive fluid |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910095523 | 2009-01-19 | ||
| CN200910095523.8 | 2009-01-19 | ||
| CN2009101461288A CN101590295B (en) | 2009-01-19 | 2009-06-08 | Self-adjusting rotor used for conveying blood or conveying shear sensitive fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101590295A CN101590295A (en) | 2009-12-02 |
| CN101590295B true CN101590295B (en) | 2012-08-22 |
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ID=41405295
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101461288A Expired - Fee Related CN101590295B (en) | 2009-01-19 | 2009-06-08 | Self-adjusting rotor used for conveying blood or conveying shear sensitive fluid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11964145B2 (en) | 2019-07-12 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3634528B1 (en) | 2017-06-07 | 2023-06-07 | Shifamed Holdings, LLC | Intravascular fluid movement devices, systems, and methods of use |
| CN111556763B (en) | 2017-11-13 | 2023-09-01 | 施菲姆德控股有限责任公司 | Intravascular fluid movement device and system |
| EP4085965A1 (en) | 2018-02-01 | 2022-11-09 | Shifamed Holdings, LLC | Intravascular blood pumps and methods of use and manufacture |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4599081A (en) * | 1982-09-30 | 1986-07-08 | Cohen Fred M | Artificial heart valve |
| US5490763A (en) * | 1994-09-15 | 1996-02-13 | Abrams; Andrew L. | Pump for shear sensitive fluids |
| US6135710A (en) * | 1996-10-02 | 2000-10-24 | Jms Co., Ltd. | Turbo blood pump |
| CN1821582A (en) * | 2005-09-16 | 2006-08-23 | 清华大学 | Shaft less open impleller suitable for micro pump |
-
2009
- 2009-06-08 CN CN2009101461288A patent/CN101590295B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4599081A (en) * | 1982-09-30 | 1986-07-08 | Cohen Fred M | Artificial heart valve |
| US5490763A (en) * | 1994-09-15 | 1996-02-13 | Abrams; Andrew L. | Pump for shear sensitive fluids |
| US6135710A (en) * | 1996-10-02 | 2000-10-24 | Jms Co., Ltd. | Turbo blood pump |
| CN1821582A (en) * | 2005-09-16 | 2006-08-23 | 清华大学 | Shaft less open impleller suitable for micro pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11964145B2 (en) | 2019-07-12 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
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| Publication number | Publication date |
|---|---|
| CN101590295A (en) | 2009-12-02 |
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