CN104984425A - Passive type suspension bearing used for heart blood pump - Google Patents
Passive type suspension bearing used for heart blood pump Download PDFInfo
- Publication number
- CN104984425A CN104984425A CN201510260228.9A CN201510260228A CN104984425A CN 104984425 A CN104984425 A CN 104984425A CN 201510260228 A CN201510260228 A CN 201510260228A CN 104984425 A CN104984425 A CN 104984425A
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- CN
- China
- Prior art keywords
- impeller
- pump case
- blood
- pump
- suspension bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
-
- 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
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/419—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
-
- 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
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/818—Bearings
- A61M60/82—Magnetic bearings
Abstract
The invention relates to a passive type suspension bearing used for a heart blood pump, and belongs to the technical field of medical devices. The passive type suspension bearing comprises an upper pump casing, a lower pump casing, an impeller, solenoid coils, permanent-magnetism steel magnets, a first blood inlet, flow channels, a pump outlet and a second blood inlet. The interior of the impeller is provided with flow channels which communicate the center of the impeller with the surfaces of blades, each of the upper pump casing and the lower pump casing is provided with one blood inlet, the solenoid coils are embedded into holes of the upper pump casing and the lower pump casing, the impeller is arranged in a cavity defined by the upper pump casing and the lower pump casing, the permanent-magnetism steel magnets are installed in holes in the upper end face and the lower end face of the impeller, and the upper blades of the impeller are symmetrical to the lower blades of the impeller. By employing the passive type suspension bearing used for the heart blood pump, abrasion and frictional heating factors which can induce thrombus are prevented. The passive type suspension bearing used for the heart blood pump is reasonable in design and simple in structure, and is suitable for the optimization design of heart blood pump systems.
Description
Technical field
What the present invention relates to is a kind of suspension bearing of technical field of medical instruments, and saying specifically is a kind of passive type suspension bearing for heart pump.
Background technology
At present, the bearing be applied in blood pump mainly contains the large class of mechanical contact bearing and non-contact type bearing two, and the former exists bearing wear and therefore brings out the problem of thrombosis, seriously constrains development and the extensive use clinically thereof of artificial blood pump.Therefore, non-contact type bearing becomes the important research direction of current blood pump.
Non-contact type bearing is divided into ACTIVE CONTROL suspension bearing, passive control suspension bearing, hybrid bearing.ACTIVE CONTROL suspension bearing is mainly magnetic suspension bearing, and it has been successfully applied to blood pump (for example, see US Patent No. 6716157B2), mainly by magneticaction by rotor suspension in pump.Hybrid bearing technology is also successfully applied in product by ArrowInternational company of the U.S. and Australian HeartWare company, and enters clinical experimental stage.
All there is following problem in magnetic suspension bearing and hybrid bearing technology: this class bearing needs more energy input; In order to make bearing function-stable, need high-precision control structure, thus add the complexity of control system.
Existing passive control suspension bearing is generally application hydraulic dynamic principle, realizes the suspension (for example, see US Patent No. 6227797B1) of rotor.Its Problems existing is that dynamic pressure gap is less, makes the blood flowing through this region be subject to great shear stress, thus easily causes haemolysis effect.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of passive type suspension bearing for heart pump, this bearing has larger gap, when blood pump works, wearing and tearing are avoided to bring out thrombosis and shear stress is excessive causes haemolysis, and without the need to the control of complexity.
The present invention is achieved through the following technical solutions, the present invention includes pump case, lower pump case, impeller, solenoid, permanent magnetic steel, first blood entry port, runner, pump discharge, second blood entry port, upper pump case, lower pump case forms pump case stator, impeller forms vane rotor, impeller internal has the runner being led to blade surface by impeller central, first blood entry port is arranged on lower pump case, second blood entry port is arranged on pump case, upper pump case, the hole of lower pump case is embedded in solenoid, impeller is placed on pump case, lower pump case surround formation cavity among, permanent magnetic steel is loaded in the hole of impeller upper and lower end face, the upper and lower blade of impeller is symmetrical, blood flows into from the first blood entry port and the second blood entry port, along with the rotation of impeller, the space of most of blood between blade flows to pump discharge, and fraction blood is injected on pump case through the runner of impeller internal, and blood merges in vane edge place through secondary channels and sprue, flows out through pump discharge.
Further, in the present invention, impeller 3 structure is symmetrical up and down along axis of rotation, respectively has 4 to 6 pairs of blades up and down, and its blade inlet angle is 20 to 60 degree, and exit angle is 20 to 60 degree; The conical surface 3A characteristic angle α of impeller 3 is 0 to 20 degree, and the conical surface 3B characteristic angle β of impeller 3 is 30 to 60 degree.
Further, in the present invention, the inner surface of upper pump case 1, lower pump case 2 parallels with the upper surface of corresponding blade 3, and gap is therebetween 150 to 300 μm.
Further, in the present invention, it is upper and lower 4 to 6 right that runner 7 has, and leads to upper and lower corresponding blade upper surface respectively and connect subterminal position, and the angle that goes out to flow of runner 7 is 40 to 90 degree.
The invention has the beneficial effects as follows: have employed driven suspension bearing structure, avoid the generation that wearing and tearing and frictional heating etc. bring out the factor of thrombosis; Bearing is driven suspension, avoids complicated control system and displacement transducer; This bearing clearance is larger than hydraulic dynamic suspension bearing gap, avoids shearing force and haemolysis effect that small―gap suture brings; The external energy consumption of passive type suspension bearing is less than magnetic suspension bearing, is conducive to the service time increasing blood pump, is conducive to blood pump to lightness, portability development.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention;
Fig. 2 is secondary channels schematic diagram of the present invention;
Fig. 3 is rotor structure schematic diagram of the present invention;
Fig. 4 is rotor profiles of the present invention and α and β angle schematic diagram;
Label in accompanying drawing is respectively: 1, upper pump case, and 2, lower pump case, 3, impeller, 4, solenoid, 5, permanent magnetic steel, the 6, first blood entry port, 7, runner, 8, pump discharge, the 9, second blood entry port.
Detailed description of the invention
Elaborate to embodiments of the invention below in conjunction with accompanying drawing, the present embodiment, premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
embodiment
Embodiments of the invention as shown in Figures 1 to 4, the present invention includes pump case 1, lower pump case 2, impeller 3, solenoid 4, permanent magnetic steel 5, first blood entry port 6, runner 7, pump discharge 8, second blood entry port 9, upper pump case 1, lower pump case 2 forms pump case stator, impeller 3 forms vane rotor, there is the runner 7 being led to blade surface by impeller central impeller 3 inside, first blood entry port 6 is arranged on lower pump case 2, second blood entry port 9 is arranged on pump case 1, upper pump case 1, the hole of lower pump case 2 is embedded in solenoid 4, impeller 3 is placed on pump case 1, lower pump case 2 surround formed cavity among, permanent magnetic steel 5 is loaded in the hole of impeller 3 upper and lower end face, impeller about 3 blade is symmetrical, blood flows into from the first blood entry port 6 and the second blood entry port 9, along with the rotation of impeller 3, the space of most of blood between blade 3 flows to pump discharge 8, and the runner 7 of fraction blood through impeller 3 inside is injected on pump case, and blood merges in vane edge place through secondary channels and sprue, flows out through pump discharge 8, impeller 3 structure is symmetrical up and down along axis of rotation, respectively has 4 to 6 pairs of blades up and down, and its blade inlet angle is 20 to 60 degree, and exit angle is 20 to 60 degree, the conical surface 3A characteristic angle α of impeller 3 is 0 to 20 degree, and the conical surface 3B characteristic angle β of impeller 3 is 30 to 60 degree, the inner surface of upper pump case 1, lower pump case 2 parallels with the upper surface of corresponding blade 3, and gap is therebetween 150 to 300 μm.It is upper and lower 4 to 6 right that runner 7 has, and leads to upper and lower corresponding blade upper surface respectively and connect subterminal position, and the angle that goes out to flow of runner 7 is 40 to 90 degree.
Operation principle of the present invention is as follows:
Population structure when the passive type suspension bearing that Fig. 1, Fig. 2 illustrate embodiment of the present invention is applied in blood pump.When being energized in solenoid 4, rotate under the action of alternating magnetic field that impeller 3 can produce at alternating current, blood flows into from the first blood entry port 6 and the second blood entry port 9, major part blood is flowed out from casing outlet 8 by the rotation of impeller 3, small part blood is sprayed by the runner 7 in impeller 3, converges with primary flow path blood.In the exit of runner 7, because blood sprays at a high speed in the gap entered between blade and pump case, partial high pressure is produced in gap, again because blade upper surface is herein the conical surface, therefore the pressure produced have simultaneously vertically with the component of radial direction, therefore impeller 3 is provided axially and radial support, thus realize the suspension of impeller 3.
Claims (4)
1. the passive type suspension bearing for heart pump, comprise pump case (1), lower pump case (2), impeller (3), upper pump case (1), lower pump case (2) forms pump case stator, impeller (3) forms vane rotor, it is characterized in that, also comprise solenoid (4), permanent magnetic steel (5), first blood entry port (6), runner (7), pump discharge (8), second blood entry port (9), there is the runner (7) being led to blade surface by impeller central impeller (3) inside, first blood entry port (6) is arranged on lower pump case (2), second blood entry port (9) is arranged on pump case (1), upper pump case (1), the hole of lower pump case (2) is embedded in solenoid (4), impeller (3) is placed on pump case (1), lower pump case (2) surround formed cavity among, permanent magnetic steel (5) is loaded in the hole of impeller (3) upper and lower end face, impeller (3) up and down blade is symmetrical, blood flows into from the first blood entry port (6) and the second blood entry port (9), along with the rotation of impeller (3), the major part space of blood between blade (3) flows to pump discharge (8), fraction blood is injected on pump case through the runner (7) that impeller (3) is inner, blood merges in vane edge place through secondary channels and sprue, flows out through pump discharge (8).
2. the passive type suspension bearing for heart pump according to claim 1, it is characterized in that, described impeller (3) structure is symmetrical up and down along axis of rotation, respectively has 4 to 6 pairs of blades up and down, its blade inlet angle is 20 to 60 degree, and exit angle is 20 to 60 degree; The conical surface 3A characteristic angle α of impeller 3 is 0 to 20 degree, and the conical surface 3B characteristic angle β of impeller (3) is 30 to 60 degree.
3. the passive type suspension bearing for heart pump according to claim 2, it is characterized in that, the inner surface of described upper pump case (1), lower pump case (2) parallels with the upper surface of corresponding blade 3, and gap is therebetween 150 to 300 μm.
4. the passive type suspension bearing for heart pump according to claim 3, it is characterized in that, described runner (7) is total upper and lower 4 to 6 right, and lead to upper and lower corresponding blade upper surface respectively and connect subterminal position, the angle that goes out to flow of runner (7) is 40 to 90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260228.9A CN104984425A (en) | 2015-05-20 | 2015-05-20 | Passive type suspension bearing used for heart blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260228.9A CN104984425A (en) | 2015-05-20 | 2015-05-20 | Passive type suspension bearing used for heart blood pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104984425A true CN104984425A (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510260228.9A Pending CN104984425A (en) | 2015-05-20 | 2015-05-20 | Passive type suspension bearing used for heart blood pump |
Country Status (1)
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| CN (1) | CN104984425A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108601873A (en) * | 2016-02-05 | 2018-09-28 | 柏林心脏有限公司 | With the supported blood pump of passive magnetic means |
| CN110585502A (en) * | 2019-09-03 | 2019-12-20 | 中国医学科学院阜外医院 | In vitro short-medium-period magnetic suspension centrifugal blood pump |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| CN113082506A (en) * | 2021-05-12 | 2021-07-09 | 苏州大学 | Apply to blood pump of artificial heart |
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| CN115887908A (en) * | 2022-10-20 | 2023-04-04 | 北京航空航天大学 | Artificial heart and blood pump |
| US11654275B2 (en) | 2019-07-22 | 2023-05-23 | Shifamed Holdings, Llc | Intravascular blood pumps with struts and methods of use and manufacture |
| US11724089B2 (en) | 2019-09-25 | 2023-08-15 | Shifamed Holdings, Llc | Intravascular blood pump systems and methods of use and control thereof |
| US11964145B2 (en) | 2020-07-13 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
Citations (7)
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|---|---|---|---|---|
| US5385581A (en) * | 1982-04-04 | 1995-01-31 | Life Extenders Corporation | Magnetically suspended and rotated rotor |
| US5470208A (en) * | 1990-10-05 | 1995-11-28 | Kletschka; Harold D. | Fluid pump with magnetically levitated impeller |
| US5685700A (en) * | 1995-06-01 | 1997-11-11 | Advanced Bionics, Inc. | Bearing and seal-free blood pump |
| CN101513546A (en) * | 2009-03-26 | 2009-08-26 | 浙江大学 | Hydrodynamic suspension bearing for artificial heart |
| CN101601875A (en) * | 2009-06-11 | 2009-12-16 | 浙江大学 | The blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump |
| CN101732769A (en) * | 2010-01-26 | 2010-06-16 | 浙江大学 | Implantable blood pump adopting driven suspension bearing |
| CN102247628A (en) * | 2010-05-17 | 2011-11-23 | 北京天高智机技术开发公司 | Implantable magnetic liquid suspension centrifugal blood pump |
-
2015
- 2015-05-20 CN CN201510260228.9A patent/CN104984425A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385581A (en) * | 1982-04-04 | 1995-01-31 | Life Extenders Corporation | Magnetically suspended and rotated rotor |
| US5470208A (en) * | 1990-10-05 | 1995-11-28 | Kletschka; Harold D. | Fluid pump with magnetically levitated impeller |
| US5685700A (en) * | 1995-06-01 | 1997-11-11 | Advanced Bionics, Inc. | Bearing and seal-free blood pump |
| CN101513546A (en) * | 2009-03-26 | 2009-08-26 | 浙江大学 | Hydrodynamic suspension bearing for artificial heart |
| CN101601875A (en) * | 2009-06-11 | 2009-12-16 | 浙江大学 | The blood passive control suspension bearing that is used for applied to implantable centrifugal blood pump |
| CN101732769A (en) * | 2010-01-26 | 2010-06-16 | 浙江大学 | Implantable blood pump adopting driven suspension bearing |
| CN102247628A (en) * | 2010-05-17 | 2011-11-23 | 北京天高智机技术开发公司 | Implantable magnetic liquid suspension centrifugal blood pump |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11654273B2 (en) | 2016-02-05 | 2023-05-23 | Berlin Heart Gmbh | Blood pump supported by passive magnetic forces |
| US10828408B2 (en) | 2016-02-05 | 2020-11-10 | Berlin Heart Gmbh | Blood pump supported by passive magnetic forces |
| CN108601873A (en) * | 2016-02-05 | 2018-09-28 | 柏林心脏有限公司 | With the supported blood pump of passive magnetic means |
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11717670B2 (en) | 2017-06-07 | 2023-08-08 | Shifamed Holdings, LLP | Intravascular fluid movement devices, systems, and methods of use |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| US11229784B2 (en) | 2018-02-01 | 2022-01-25 | 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 |
| CN110585502A (en) * | 2019-09-03 | 2019-12-20 | 中国医学科学院阜外医院 | In vitro short-medium-period magnetic suspension centrifugal blood pump |
| US11724089B2 (en) | 2019-09-25 | 2023-08-15 | Shifamed Holdings, Llc | Intravascular blood pump systems and methods of use and control thereof |
| US11964145B2 (en) | 2020-07-13 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
| CN113082506A (en) * | 2021-05-12 | 2021-07-09 | 苏州大学 | Apply to blood pump of artificial heart |
| CN115887908A (en) * | 2022-10-20 | 2023-04-04 | 北京航空航天大学 | Artificial heart and blood pump |
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Application publication date: 20151021 |