CN102895709A - Hydraulic suspension type blood pump - Google Patents
Hydraulic suspension type blood pump Download PDFInfo
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- CN102895709A CN102895709A CN2012104220800A CN201210422080A CN102895709A CN 102895709 A CN102895709 A CN 102895709A CN 2012104220800 A CN2012104220800 A CN 2012104220800A CN 201210422080 A CN201210422080 A CN 201210422080A CN 102895709 A CN102895709 A CN 102895709A
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- pump
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- lower cover
- loam cake
- vane rotor
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Abstract
The invention discloses a hydraulic suspension type blood pump, wherein the inner part of an upper pump cover comprises an upper cavity of the upper pump cover and a volute flow channel cavity of the upper pump cover; the top of the upper cover is communicated with a pump inlet, and the side of the upper cover is communicated with the upper half of a pump outlet; the inner part of lower pump cover is a volute flow channel cavity of the lower pump cover; the middle part of the lower pump cover is provided with a cylindrical inner bump of the lower pump cover, and the side of the lower pump cover is communicated with the lower half of the pump outlet; an impeller rotor is composed of 4-6 blades and a cylindrical through hole in the middle, and the cross sections of the blades are rightward U-shaped; the impeller rotor, a driving magnetic steel and a stator coil are coaxially installed on inner bump of the lower pump cover in the volute flow channel cavity; and when the hydraulic suspension type blood pump works, the upper top surfaces and the lower top surfaces of the blades respectively form a wedge-shaped gaps together with the inner wall of the pump, and when fluids are fed and the blades rotate, the fluids in the wedge-shaped gaps produces thrusts to the blades, so that the impeller rotor is suspended in the cavity in the pump. According to the hydraulic suspension type blood pump, the blades can be suspended without active control system, the abrasion can be reduced, and the blood pump simultaneously has the characteristics of low heat and low power consumption.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, particularly relate to a kind of Hydrodynamic suspension formula blood pump.
Background technology
At present, the bearing that is applied in the blood pump mainly contains mechanical contact bearing and non-contact type bearing two large classes.The mechanical contact bearing exists motor bearings wearing and tearing and frictional heating and the problem of bringing out thrombosis, has seriously restricted the development of blood pump and extensive use clinically thereof.Therefore, non-contact type bearing becomes the study hotspot of modern blood pump.
Non-contact type bearing divides ACTIVE CONTROL suspension bearing, passive control suspension bearing, hybrid bearing.The ACTIVE CONTROL suspension bearing is mainly electromagnetic suspension bearing for example referring to US Patent No. 7470246, and it successfully is applied on the blood pump, it mainly be by solenoid energising produce magnetic force with rotor suspension in pump.The states such as U.S., day, moral take the lead in being engaged in technique research for many years, still have so far many technical problems, and the equal many places of product are in the trial period.Hybrid bearing technology is also by U.S. Arrow International company and Australian HeartWare company successfully in the application product, and entered clinical experimental stage.
All there is following problem for above-mentioned two kinds of bearing technologies:
1, Active Magnetic Suspending Bearing needs more energy input.
2, in order to make the electromagnetic suspension bearing function-stable, need high-precision control structure, thereby increased the complexity of whole control system.
Summary of the invention
The objective of the invention is for the deficiencies in the prior art, a kind of Hydrodynamic suspension formula blood pump is provided, when blood pump was worked, avoid wearing and tearing and frictional heating etc. brought out the factor of thrombosis, and need not complicated control.
In order to achieve the above object, the technical solution used in the present invention is as follows: a kind of Hydrodynamic suspension formula blood pump, and it comprises pump loam cake, pump lower cover, vane rotor, stator solenoid and drives magnet steel; Wherein, tops has pump intake on the described pump, the bottom has the first half of pump discharge, pump loam cake internal cavity shape is divided into the pump loam cake upper cavity on top and pump loam cake volute runner cavity two parts of bottom, the top of pump loam cake upper cavity is the truncated cone-shaped cavity, the bottom is cylindrical cavity, the inclined-plane cone angle of truncated cone-shaped cavity is α, form the first wedge gap between the blade upper surface of the inclined-plane of truncated cone-shaped cavity and vane rotor, the width of wedge gap narrows down to h2 along the opposite direction of leaf line speed gradually by h1, and the truncated cone-shaped cavity is coaxial with pump intake and communicate; Described pump lower cover inside is pump lower cover volute runner cavity, the center of pump lower cover volute runner cavity is pump lower cover internal projection, the bottom surface of the blade lower surface of vane rotor and pump lower cover volute runner cavity forms the second wedge gap, the width of the second wedge gap narrows down to H2 along the opposite direction of leaf line speed gradually by H1, the side of pump lower cover volute runner cavity has the latter half of pump discharge, the latter half of the pump discharge of the first half of the pump discharge of pump loam cake and pump lower cover forms pump discharge, the pump lower cover volute runner cavity of the pump loam cake volute runner cavity of pump loam cake and pump lower cover forms volute runner cavity, volute runner cavity communicates with pump intake and pump discharge respectively, on the coaxial pump lower cover internal projection that is installed in the volute runner cavity of vane rotor and stator solenoid, drive magnet steel and be fixed on the vane rotor inwall.
Further, described vane rotor along the circumferential direction is spacedly distributed by 4-6 sheet blade is axially having on the cylindrical body sidewall of through hole; Leaf cross-section is the Contraband font, and the through hole in the middle of the vane rotor is embedded in the driving magnet steel.
Further, the inclined-plane cone angle of described truncated cone-shaped cavity is that α is 4-10 °.
Further, the width h1 of described the first wedge gap is 200 μ m, and h2 is 150 μ m.
Further, the width H1 of described the second wedge gap is 150 μ m, and H2 is 100 μ m.
The beneficial effect that the present invention has is:
1, adopts the bearing arrangement of complete Hydrodynamic suspension, avoided wearing and tearing and frictional heating etc. to bring out the generation of thrombosis factor, avoided complicated active control system, improved reliability and the impact resistance of blood pump.
2, adopted novel blade construction, by and the pump housing internal face between the small wedge gap that forms, make fluid produce enough thrust to blade, reach within the cavity that allows blade be suspended in pump, avoided again the small groove structure of other Hydrodynamic suspension pump to the destruction of blood, simultaneously the structures shape of blade its less quality, more be conducive to the suspension of blade.
3, because Hydrodynamic suspension is driven suspension, basic noenergy consumption effectively reduces heating and labyrinth that the power transmission energy causes, is convenient to blood pump to lightness, the progress of portability future development.
Description of drawings
Fig. 1 is structural principle sketch map of the present invention;
Fig. 2 is pump loam cake generalized section of the present invention;
Fig. 3 is view under the pump loam cake of the present invention;
Fig. 4 is pump lower cover generalized section of the present invention;
Fig. 5 is the top view of pump lower cover of the present invention;
Fig. 6 is that the isometry of impeller of the present invention is surveyed sketch map;
Fig. 7 is impeller side view of the present invention;
Fig. 8 is that impeller blade of the present invention is installed partial sectional view;
Fig. 9 is radially Hydrodynamic suspension sketch map of impeller of the present invention;
Figure 10 is the T view of Fig. 9;
Figure 11 is pump inner fluid flow schematic diagram;
Among the figure, pump loam cake 1, pump loam cake upper cavity 1A, pump loam cake volute runner cavity 1B, pump loam cake cylindrical cavity sidewall 1C, pump lower cover 2, pump lower cover volute runner cavity 2A, pump lower cover internal projection 2B, vane rotor 3, blade upper surface 3A, blade lower surface 3B, blade sidewall 3C, stator solenoid 4, driving magnet steel 5, pump intake 6, pump discharge 7.
The specific embodiment
Describe the present invention in detail below in conjunction with accompanying drawing, it is more obvious that purpose of the present invention and effect will become.
As shown in the figure, Hydrodynamic suspension formula blood pump of the present invention comprises pump loam cake 1, pump lower cover 2, vane rotor 3, stator solenoid 4 and drives magnet steel 5; Wherein: vane rotor 3, stator solenoid 4 and driving magnet steel 5 all place in the cavity that is comprised of pump loam cake 1 and pump lower cover 2, drive magnet steel 5 and are fixed on vane rotor 3 inwalls vane rotor 3 and the 4 coaxial installations of stator solenoid.
As shown in Figures 2 and 3, pump loam cake 1 top has pump intake 6, the bottom has the first half of pump discharge, pump loam cake 1 internal cavity shape is divided into the pump loam cake upper cavity 1A on top and pump loam cake volute runner cavity 1B two parts of bottom, the top of pump loam cake upper cavity 1A is the truncated cone-shaped cavity, the bottom is cylindrical cavity, the inclined-plane cone angle of truncated cone-shaped cavity is α, form the first wedge gap (as shown in Figure 8) between the blade upper surface 3A of the inclined-plane of truncated cone-shaped cavity and vane rotor 3, the width of wedge gap narrows down to h2 along the opposite direction of leaf line speed gradually by h1, and truncated cone-shaped cavity and pump intake 6 are coaxial and communicate;
As shown in Figure 4 and Figure 5, pump lower cover 2 inside are pump lower cover volute runner cavity 2A, the center of pump lower cover volute runner cavity 2A is pump lower cover internal projection 2B, the blade lower surface 3B of vane rotor 3 and cavity bottom surface form the second wedge gap (as shown in Figure 8), the width of the second wedge gap narrows down to H2 along the opposite direction of leaf line speed gradually by H1, the lower cavity side has the latter half of pump discharge, the latter half of the pump discharge of the first half of the pump discharge of pump loam cake 1 and pump lower cover 2 forms pump discharge 7, the pump lower cover volute runner cavity 2A of the pump loam cake volute runner cavity 1B of pump loam cake 1 and pump lower cover 2 forms volute runner cavity, volute runner cavity communicates with pump intake 6 and pump discharge 7 respectively, on vane rotor 3 and the stator solenoid 4 coaxial pump lower cover internal projection 2B that are installed in the volute runner cavity.
Shown in Fig. 6 and 7, vane rotor 3 along the circumferential direction is spacedly distributed by 4-6 sheet blade axially to be had on the cylindrical body sidewall of through hole.Leaf cross-section is the Contraband font, and the through hole at vane rotor middle part is embedded in and drives magnet steel 5, is used for and stator coil 4 couple drive.Installation rear blade upper surface 3A and blade lower surface 3B form wedge gap respectively and between the bottom surface of the inclined-plane of pump loam cake upper cavity round platform part and pump lower cover volute runner cavity.Be full of the pump internal cavity at liquid, after vane rotor 3 began rotation, liquid flowed into from the entrance gap of larger entrance h1 and H1, from the outlet gap outflow of less outlet h2 and H2, liquid in the wedge gap can form fluid pressure, i.e. liquid suspension power F to the surface of blade like this
uAnd F
d, these two power are suspended in the interior cavity of pump vane rotor 3, reach suspension effect.When vane rotor 3 deflection pump loam cakes 1 or pump lower cover 2, its corresponding wedge gap reduces, and fluid pressure increases sharply, the wedge gap of opposite side then increases, fluid pressure reduces rapidly, orders about vane rotor to the opposite direction motion of skew, keeps the up and down stable suspersion of rotor in pump.Same principle as shown in Figure 9 and Figure 10, also forms wedge gap between the sidewall 1C of blade sidewall 3C and pump loam cake upper chamber column part, produce fluid pressure, and it is stable to order about the radial position of vane rotor 3 in pump.
Above-described round platform and cylindrical cavity 1A inclined-plane cone angle are 4-10 °;
Described wedge gap h1 is 200 μ m, and h2 is 150 μ m;
Described wedge gap H1 is 150 μ m, and H2 is 100 μ m;
Figure 11 has schematically shown runner flow cardon of the present invention, the blood in the minim gap in the whole pump under the rotation of vane rotor 3 can to upgrading in time, avoided flow dead, reduced thrombosed possible.
Claims (5)
1. a Hydrodynamic suspension formula blood pump is characterized in that, it comprises pump loam cake (1), pump lower cover (2), vane rotor (3), stator solenoid (4) and drives magnet steel (5) etc.; Wherein, described pump loam cake (1) top has pump intake (6), the bottom has the first half of pump discharge, pump loam cake (1) internal cavity shape is divided into the pump loam cake upper cavity on top and pump loam cake volute runner cavity two parts of bottom, the top of pump loam cake upper cavity is the truncated cone-shaped cavity, the bottom is cylindrical cavity, the inclined-plane cone angle of truncated cone-shaped cavity is α, form the first wedge gap between the blade upper surface of the inclined-plane of truncated cone-shaped cavity and vane rotor (3), the width of wedge gap narrows down to h2 along the opposite direction of leaf line speed gradually by h1, and the truncated cone-shaped cavity is coaxial with pump intake (6) and communicate; Described pump lower cover (2) inside is pump lower cover volute runner cavity, the center of pump lower cover volute runner cavity is pump lower cover internal projection, the bottom surface of the blade lower surface of vane rotor (3) and pump lower cover volute runner cavity forms the second wedge gap, the width of the second wedge gap narrows down to H2 along the opposite direction of leaf line speed gradually by H1, the side of pump lower cover volute runner cavity has the latter half of pump discharge, the latter half of the pump discharge of the first half of the pump discharge of pump loam cake (1) and pump lower cover (2) forms pump discharge (7), the pump lower cover volute runner cavity of the pump loam cake volute runner cavity of pump loam cake (1) and pump lower cover (2) forms volute runner cavity, volute runner cavity communicates with pump intake (6) and pump discharge (7) respectively, on the coaxial pump lower cover internal projection that is installed in the volute runner cavity of vane rotor (3) and stator solenoid (4), drive magnet steel (5) and be fixed on vane rotor (3) inwall.
2. described Hydrodynamic suspension formula blood pump according to claim 1 is characterized in that described vane rotor (3) along the circumferential direction is spacedly distributed by 4-6 sheet blade axially to be had on the cylindrical body sidewall of through hole; Leaf cross-section is the Contraband font, and the through hole in the middle of the vane rotor (3) is embedded in and drives magnet steel (5).
3. described Hydrodynamic suspension formula blood pump according to claim 1 is characterized in that the inclined-plane cone angle of described truncated cone-shaped cavity is that α is about 4-10 °.
4. described Hydrodynamic suspension formula blood pump according to claim 1 is characterized in that the width h1 of described the first wedge gap is 200 μ m, and h2 is 150 μ m.
5. described Hydrodynamic suspension formula blood pump according to claim 1 is characterized in that the width H1 of described the second wedge gap is 150 μ m, and H2 is 100 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422080.0A CN102895709B (en) | 2012-10-30 | 2012-10-30 | Hydraulic suspension type blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422080.0A CN102895709B (en) | 2012-10-30 | 2012-10-30 | Hydraulic suspension type blood pump |
Publications (2)
| Publication Number | Publication Date |
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| CN102895709A true CN102895709A (en) | 2013-01-30 |
| CN102895709B CN102895709B (en) | 2015-02-25 |
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| CN201210422080.0A Expired - Fee Related CN102895709B (en) | 2012-10-30 | 2012-10-30 | Hydraulic suspension type blood pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105343950A (en) * | 2015-09-25 | 2016-02-24 | 济南大学 | Artificial blood pump adopting hydraulic suspension bearing |
| CN109876218A (en) * | 2019-03-28 | 2019-06-14 | 哈尔滨理工大学 | A kind of Implanted ventricular assist device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080200750A1 (en) * | 2006-11-17 | 2008-08-21 | Natalie James | Polymer encapsulation for medical device |
| CN101773691A (en) * | 2010-01-26 | 2010-07-14 | 浙江大学 | Suspension permanent magnetic blood pump |
| CN101810891A (en) * | 2009-06-08 | 2010-08-25 | 钱逸 | Self-suspending artificial heart |
| CN202875903U (en) * | 2012-10-30 | 2013-04-17 | 浙江大学 | Hydraulic suspended blood pump |
-
2012
- 2012-10-30 CN CN201210422080.0A patent/CN102895709B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080200750A1 (en) * | 2006-11-17 | 2008-08-21 | Natalie James | Polymer encapsulation for medical device |
| CN101810891A (en) * | 2009-06-08 | 2010-08-25 | 钱逸 | Self-suspending artificial heart |
| CN101773691A (en) * | 2010-01-26 | 2010-07-14 | 浙江大学 | Suspension permanent magnetic blood pump |
| CN202875903U (en) * | 2012-10-30 | 2013-04-17 | 浙江大学 | Hydraulic suspended blood pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105343950A (en) * | 2015-09-25 | 2016-02-24 | 济南大学 | Artificial blood pump adopting hydraulic suspension bearing |
| CN105343950B (en) * | 2015-09-25 | 2017-09-22 | 济南大学 | A kind of artificial blood pump of use Hydrodynamic suspension bearing |
| CN109876218A (en) * | 2019-03-28 | 2019-06-14 | 哈尔滨理工大学 | A kind of Implanted ventricular assist device |
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| Publication number | Publication date |
|---|---|
| CN102895709B (en) | 2015-02-25 |
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Granted publication date: 20150225 Termination date: 20201030 |