CN116440404A - Closed micropump based on magnetic force drive - Google Patents
Closed micropump based on magnetic force drive Download PDFInfo
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- CN116440404A CN116440404A CN202310559227.9A CN202310559227A CN116440404A CN 116440404 A CN116440404 A CN 116440404A CN 202310559227 A CN202310559227 A CN 202310559227A CN 116440404 A CN116440404 A CN 116440404A
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 164
- 230000001808 coupling effect Effects 0.000 claims abstract description 4
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 7
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 6
- 229920002530 polyetherether ketone Polymers 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 4
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 17
- 230000007774 longterm Effects 0.000 abstract description 6
- 239000008280 blood Substances 0.000 description 9
- 210000004369 blood Anatomy 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 206010019280 Heart failures Diseases 0.000 description 2
- 206010037368 Pulmonary congestion Diseases 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010001029 Acute pulmonary oedema Diseases 0.000 description 1
- 206010007556 Cardiac failure acute Diseases 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000003205 diastolic effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002107 myocardial effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
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
- A61M60/10—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
- A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
-
- 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
- A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
- A61M60/237—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
-
- 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
- A61M60/30—Medical purposes thereof other than the enhancement of the cardiac output
- A61M60/31—Medical purposes thereof other than the enhancement of the cardiac output for enhancement of in vivo organ perfusion, e.g. retroperfusion
-
- 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
- A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
- A61M60/411—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor
-
- 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
- A61M60/465—Details relating to driving for devices for mechanical circulatory actuation
- A61M60/489—Details relating to driving for devices for mechanical circulatory actuation the force acting on the actuation means being magnetic
-
- 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
- A61M60/827—Sealings between moving parts
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Mechanical Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a closed micropump based on magnetic driving. The closed micro pump based on magnetic force driving comprises a motor assembly, a rotating assembly connected with the motor assembly and an impeller connected with the rotating assembly; the rotating assembly comprises a driving magnetic wheel and a driven magnetic wheel which are axially arranged at intervals; the driving magnetic wheel is connected with the motor component; the driven magnetic wheel is connected with the impeller; the driving magnetic wheel is suitable for rotating under the driving of the motor component, and drives the driven magnetic wheel to drive the impeller to rotate through the magnetic coupling action so as to pump media; the motor component and the driving magnetic wheel are independently and fully sealed to isolate the medium. The invention adopts the driving magnetic wheel and the driven magnetic wheel which are axially spaced as the rotating components, thereby realizing the independent full sealing of the motor component and the driving magnetic wheel, not only isolating the sealed motor component from the medium, but also separating the sealing performance after sealing from the constraint of dynamic seal, and ensuring the durability of the seal so as to effectively ensure the long-term safe sustainable operation of the micropump.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to an improved closed micropump based on magnetic driving.
Background
Currently, heart failure patients have significantly increased over the past as the population has advanced. Heart failure refers to a failure of the circulatory system of the heart caused by insufficient discharge of venous blood back to the heart due to failure of the systolic or diastolic function of the heart, resulting in blood stasis in the venous system and insufficient blood supply in the arterial system. In particular, the onset of acute heart failure causes not only the problems of acute pulmonary congestion, pulmonary edema and the like due to the reduction of myocardial contractility, the sudden drop of cardiac output and the pulmonary congestion, but also irreversible damage of various tissues and organs due to insufficient perfusion.
In practice, minimally invasive left heart assist devices typically include a micropump. Micropumps of the prior art often employ mechanical seals to prevent the flow of media into or out of the pump, based on the operating environment requirements. However, the mechanical seal is essentially designed to prevent the medium from flowing in or out by tightening the shaft, and because the mechanical seal contacts the shaft rotating at a high speed, friction inevitably occurs, so that the mechanical seal is worn, and the sealing life is shortened, and high heat is generated, so that the medium around the micro pump is affected, which is very unfavorable for long-term use of the micro pump.
Disclosure of Invention
The invention provides an improved closed micropump based on magnetic drive, which can at least improve the sealing performance of the existing micropump and ensure the long-term safe sustainable operation of the micropump.
Therefore, the invention provides the following technical scheme:
a closed micropump based on magnetic driving. The closed micro pump based on magnetic force driving comprises a motor assembly, a rotating assembly connected with the motor assembly and an impeller connected with the rotating assembly; the rotating assembly comprises a driving magnetic wheel and a driven magnetic wheel which are axially arranged at intervals; the driving magnetic wheel is connected with the motor component; the driven magnetic wheel is connected with the impeller; the driving magnetic wheel is suitable for being driven by the motor assembly to rotate, and drives the driven magnetic wheel to drive the impeller to rotate through magnetic coupling so as to pump media; the motor component and the driving magnetic wheel are independently and fully sealed to isolate the medium.
Optionally, the magnetically driven enclosed micropump further comprises a pump housing adapted to house the impeller and to deliver the medium, and a guide vane mounted behind the pump housing; the front end of the pump shell is provided with an inlet for receiving the medium, and the periphery of the rear end of the pump shell is provided with an outlet corresponding to the guide vane for outputting the medium; the guide vane is located behind the impeller and is adapted to guide the medium to the outlet.
Optionally, the closed micro pump based on magnetic force driving further comprises an adapter cover installed behind the guide vane; the front end and the rear end of the switching cover are suitable for respectively defining a driven magnetic wheel cavity and a driving magnetic wheel cavity so as to respectively store the driven magnetic wheel and the driving magnetic wheel, and the driven magnetic wheel and the driving magnetic wheel are axially isolated.
Optionally, the magnetic force driving-based enclosed micropump further comprises a casing installed at the rear of the transfer cover; the housing is adapted to enclose the motor assembly and defines the drive magnet wheel cavity with the adapter cover to enclose the drive magnet wheel.
Optionally, the closed micro pump based on magnetic force driving further comprises a driving shaft and a driven shaft; the driving shaft is supported on the shell and is respectively connected with the motor component and the driving magnetic wheel; the driven shaft passes through the guide vane and is respectively connected with the driven magnetic wheel and the impeller.
Optionally, the driving magnetic wheel and the driven magnetic wheel are provided with halbach array magnet structures, the strong magnetic surfaces of the driving magnetic wheel and the driven magnetic wheel are opposite, and the magnetic poles of the opposite parts are opposite.
Optionally, the driving magnetic wheel and the driven magnetic wheel each comprise a first magnet unit, a second magnet unit, a third magnet unit and a fourth magnet unit which are sequentially arranged along the circumferential direction; the first magnet unit, the second magnet unit, the third magnet unit and the fourth magnet unit all comprise two magnets with opposite magnetic properties; two magnets in the first magnet unit and the third magnet unit are arranged along the axial direction, and the positions of the two magnets in the first magnet unit and the third magnet unit are opposite; two magnets in the second magnet unit and the fourth magnet unit are arranged along the circumferential direction, and the positions of the two magnets in the second magnet unit and the fourth magnet unit are opposite.
Optionally, at least one group of the first magnet unit, the second magnet unit, the third magnet unit and the fourth magnet unit is circularly arranged in sequence along the circumferential direction.
Optionally, the first magnet unit, the second magnet unit, the third magnet unit and the fourth magnet unit are all fan-shaped structures; the inner diameter of the fan-shaped structure is smaller than or equal to 1mm, and the outer diameter of the fan-shaped structure is smaller than or equal to 5mm.
Optionally, an axial spacing between the driving and driven magnetomotive wheels is greater than or equal to 0.5mm and less than or equal to 5mm.
Optionally, the driven magnetic wheel is made of neodymium-iron-boron N50SH or samarium-cobalt SmCo, and the surface of the driven magnetic wheel is covered with a biocompatible epoxy resin film.
Optionally, the adapting cover is made of a non-metal material, and the non-metal material comprises polyether ether ketone PEEK or ceramic.
Compared with the prior art, the technical scheme of the embodiment of the invention has the beneficial effects.
For example, by adopting the driving magnetic wheel and the driven magnetic wheel which are axially spaced as the rotating components, the motor component and the driving magnetic wheel are independently and fully sealed, so that the sealed motor component is isolated from a medium, the sealing performance after sealing is separated from the constraint of dynamic sealing, the sealing is durable, and the long-term safe and sustainable operation of the micropump is effectively ensured.
For example, the principle of opposite attraction and like attraction is utilized, two permanent magnet wheels, namely a driving magnetic wheel and a driven magnetic wheel, are adopted as carriers for torque transmission (namely, the traditional steel shaft transmission is replaced by magnetic transmission), and as the action of force between the permanent magnet wheels is generated by a magnetic field, a physical carrier is not needed, and a gap with a certain distance can exist between the two permanent magnet wheels, the complete independent sealing of a motor assembly and the driving magnetic wheel can be realized, so that the constraint of dynamic sealing is removed.
For another example, the driven magnetic wheel chamber and the driving magnetic wheel chamber can be respectively defined at the front end and the rear end of the switching cover so as to respectively accommodate the driven magnetic wheel and the driving magnetic wheel, so that the driven magnetic wheel and the driving magnetic wheel are axially isolated, the driving magnetic wheel and the motor assembly at the rear part of the driving magnetic wheel are conveniently and independently fully sealed, and the motor assembly is isolated from a medium so as to avoid the motor assembly from being broken down due to the contact of the medium and the motor assembly.
For example, the driving magnetic wheel and the driven magnetic wheel both adopt halbach array magnet structures, so that the output torque and efficiency can be improved in two directions, and the magnetizing surface can be maximized in the limited space of the micropump and has ideal magnetic pole spacing (for example, the magnetic pole spacing can be greater than or equal to 0.5mm and less than or equal to 5 mm), thereby achieving good magnetic pole performance and efficiency and fully meeting the torque output requirement of the micropump.
Drawings
Fig. 1 is a schematic diagram of a prior art transmission of a micropump.
Fig. 2 is a schematic diagram of a transmission mode of a closed type micropump based on magnetic driving in an embodiment of the present invention.
Fig. 3 is a partial cross-sectional view of a magnetically driven enclosed micropump in accordance with an embodiment of the present invention.
Fig. 4 is an exploded view of a closed micropump based on magnetic actuation in an embodiment of the present invention.
Fig. 5 is a cross-sectional view of a transfer cover in an embodiment of the invention.
FIG. 6 is a schematic diagram of the action of the driving and driven magnetomotive force wheels according to an embodiment of the present invention.
Fig. 7 is a side view of a halbach array magnet structure in an embodiment of the invention.
Fig. 8 is a top view of a halbach array magnet structure in an embodiment of the invention.
Reference numerals illustrate:
the magnetic wheel driving device comprises a pump shell, a 2 impeller, a 3 driven shaft, a 4 sliding bearing, a 5 guide vane, a 51 guide vane rear protrusion, a 61 first rolling bearing, a 62 second rolling bearing, a 63 third rolling bearing, a 7 driven magnetic wheel, a 8 switching cover, a 81 switching cover front protrusion, a 811 switching cover front protrusion outer circumferential side wall, a 82 switching cover rear protrusion, a 821 switching cover rear protrusion inner circumferential side wall, a 9 driving magnetic wheel, a 10 front cover, a 101 front cover protrusion, a 11 shell, a 12 iron core, a 13 coil, 14 magnetic steel, a 15 driving shaft, a 16 driving plate, a 17 rear cover, a 18 power supply line, a 19 inlet, a 20 outlet, a A first magnet unit, a B second magnet unit, a C third magnet unit, a D fourth magnet unit, a 21 rotating shaft, a 22 mechanical seal, a 31 driven magnetic wheel chamber and a 32 driving magnetic wheel chamber.
Detailed Description
Referring to fig. 1, prior art micropumps often employ a mechanical seal 22 to prevent the flow of media into or out of the pump, based on the operating environment requirements. However, the mechanical seal 22 is essentially designed to prevent the inflow or outflow of the medium by tightening the shaft 21, and because the mechanical seal 22 is in contact with the shaft 21 rotating at a high speed, friction inevitably occurs, so that the mechanical seal 22 is worn, resulting in a shortened sealing life, and high heat is generated, thereby affecting the medium around the micro pump, which is very unfavorable for long-term use of the micro pump.
In order to solve the problems, the invention provides an improved closed micropump based on magnetic driving. Referring to fig. 2, the closed micro pump based on magnetic driving realizes independent full sealing of a motor assembly and the driving magnetic wheel 9 by adopting the driving magnetic wheel 9 and the driven magnetic wheel 7 which are axially spaced as rotating assemblies, so that the closed motor assembly is isolated from a medium, the sealing performance after sealing is separated from the constraint of dynamic sealing, the sealing is durable, and the long-term safe sustainable operation of the micro pump is effectively ensured.
In order to make the objects, features and advantageous effects of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the following detailed description is merely illustrative of the invention, and not restrictive of the invention. Moreover, the use of the same, similar reference numbers in the figures may indicate the same, similar elements in different embodiments, and descriptions of the same, similar elements in different embodiments, as well as descriptions of prior art elements, features, effects, etc. may be omitted.
For convenience of description and understanding, in the embodiment of the present invention, a direction in which the closed type micro pump based on magnetic force transmits a medium is taken as a front-rear direction, and the medium enters the pump casing 1 of the closed type micro pump based on magnetic force from a front end of the closed type micro pump based on magnetic force and is adapted to be pumped from front to rear by the impeller 2 in the pump casing 1. The directions involved in the description of the closed type micropump based on magnetic driving and its respective constituent parts are all referred to as the front-rear directions.
Referring to fig. 3 and 5, an embodiment of the present invention provides a closed type micro pump based on magnetic driving.
Specifically, the closed type micro pump based on magnetic force driving may include a motor assembly, a rotating assembly connected to the motor assembly, and an impeller 2 connected to the rotating assembly. The rotating assembly comprises a driving magnetic wheel 9 and a driven magnetic wheel 7 which are axially arranged at intervals; the driving magnetic wheel 9 is connected with the motor component; the driven magnetic wheel 7 is connected with the impeller 2; the driving magnetic wheel 9 is suitable for being driven by the motor assembly to rotate, and drives the driven magnetic wheel 7 to drive the impeller 2 to rotate through the magnetic coupling effect so as to pump media; the motor assembly and the driving magnetic wheel 9 are independently and fully sealed to isolate the medium.
In some embodiments, the magnetically driven enclosed micropump is adapted for use as a blood pump and can pump blood within the heart to arterial blood vessels. Accordingly, the medium may comprise blood. By adopting the technical scheme, the motor component of the blood pump can be independently and fully sealed to be isolated from blood, so that the influence of blood permeation on the motor component is avoided.
In a specific implementation, the magnetically driven enclosed micropump may further comprise a pump housing 1 adapted to house the impeller 2 and to convey a medium, and a guide vane 5 mounted behind the pump housing 1. Wherein the front end of the pump housing 1 has an inlet 19 for receiving a medium, such as blood; and the peripheral side of the rear end thereof is provided with an outlet 20 corresponding to the guide vane 5 for outputting the medium out of the pump casing 1.
In a specific implementation, the impeller 2 is adapted to rotate to pump the medium inside the pump casing 1 from front to back; while the guide vanes 5 are located behind the impeller 2 and are adapted to guide the medium pumped by the impeller 2 to the outlet 20.
In some embodiments, the magnetically driven enclosed micropump may further comprise an adapter cover 8 mounted behind the guide vanes 5. The transfer cover 8 can be made of non-metal materials such as polyether ether ketone PEEK or ceramic, and can obviously eliminate vortex generated by a rotating magnetic field, so that energy loss and unnecessary temperature rise caused by the vortex are avoided, and the transmission efficiency of the micropump is improved.
In particular implementations, the front and rear ends of the adapter cover 8 are adapted to define a driven magnetic wheel cavity 31 and a driving magnetic wheel cavity 32, respectively, to receive the driven magnetic wheel 7 and the driving magnetic wheel 9, respectively, so as to axially isolate the driven magnetic wheel 7 and the driving magnetic wheel 9.
In the embodiment of the present invention, the axial direction means the direction in which the rotation axis of the impeller 2 is located. The impeller 2, the guide vane 5, the driven magnetic wheel 7 and the driving magnetic wheel 9 are coaxially arranged.
For ease of description, in some embodiments, the axial direction may be parallel to the fore-aft direction. In this case, the impeller 2 is adapted to rotate around the front-rear direction and to pump the medium from the front end of the pump casing 1 backward. And the guide vane 5 is located behind the impeller 2 and adapted to guide the medium pumped by the impeller 2 further to the outlet 20 on the rear end circumferential side of the pump casing 1 to output the medium out of the pump casing 1.
In some embodiments, the transit cap 8 has a forward extending transit cap front projection 81. Accordingly, the guide vane 5 has a guide vane rear projection 51 extending rearward. And, the transfer cover front projection 81 and the vane rear projection 51 are both circumferentially surrounded.
In particular implementations, the adapter cover front projection 81 is adapted to be embedded within the vane rear projection 51, and an outer peripheral sidewall 811 of the adapter cover front projection 81 is closely nested or connected with an inner peripheral sidewall of the vane rear projection 51 to collectively define the driven magnetic wheel cavity 31 for assembling the driven magnetic wheel 7.
In a specific implementation, the closed micropump based on magnetic driving further comprises a driven shaft 3 connected with the impeller 2 and the driven magnetic wheel 7 respectively through the guide vane 5, and the driven shaft 3 is coaxially arranged with the impeller 2 and the driven magnetic wheel 7 to transmit torque from the driven magnetic wheel 7 to the impeller 2.
In some embodiments, the magnetically driven enclosed micropump further comprises a sliding bearing 4 and/or a first rolling bearing 61 mounted within the guide vane 5 to support the driven shaft 3.
In a particular implementation, the sliding bearing 4 is adapted to be fitted axially inside the front end of the guide vane 5 and is arranged coaxially with the guide vane 5. The driven shaft 3 passes through the slide bearing 4, and is supported by the slide bearing 4.
In a specific implementation, the first rolling bearing 61 is adapted to be fitted axially inside the rear end of the guide vane 5 and is arranged coaxially with the guide vane 5. The driven shaft 3 passes through the first rolling bearing 61, and is supported by the first rolling bearing 61.
In some embodiments, the magnetically driven enclosed micropump may further comprise a housing 11 mounted behind the adaptor cap 8.
In particular, the housing 11 is adapted to enclose the motor assembly and, together with the adaptor cover 8, defines a drive magnet wheel chamber 32 to enclose the drive magnet wheel 9.
In some embodiments, the transit cap 8 has a transit cap rear projection 82 that extends rearward and circumferentially surrounds. Accordingly, the cabinet 11 includes a front cover 10 at a front end thereof, and the front cover 10 has a front cover protrusion 101 extending forward and circumferentially surrounding.
In particular implementations, the front cover projection 101 is adapted to nest within the adaptor cover rear projection 82 and the peripheral side wall of the front cover projection 101 nests or connects closely with the inner peripheral side wall 821 of the adaptor cover rear projection 82 to collectively define the drive magnet wheel chamber 32 for assembly of the drive magnet wheel 9.
In particular embodiments, the magnetically driven enclosed micropump further comprises a drive shaft 15 adapted to be driven in rotation by a motor assembly. The drive shaft 15 is supported by the housing 11 and is coaxially connected to the drive magnet wheel 9 through the front cover 10 of the housing 11 to transfer torque from the motor assembly to the drive magnet wheel 9.
In some embodiments, the casing 11 of the closed type micro pump driven based on magnetic force further includes a rear cover 17 corresponding to the front cover 10, and the front cover 10 and the rear cover 17 are respectively equipped with a second rolling bearing 62 and a third rolling bearing 63 for supporting the driving shaft 15.
In some embodiments, the motor assembly may include a magnetic steel 14 disposed around a drive shaft 15, a coil 13 wound around the magnetic steel 14, and an iron core 12 disposed around the coil 13. The coil 13 is adapted to generate a magnetic field to magnetize the iron core 12 under the condition of energizing, and further drive the magnetic steel 14 to drive the driving shaft 15 to rotate through the magnetized iron core 12.
In some embodiments, the magnetically-driven enclosed micropump further includes a driving plate 16 disposed within the housing 11, and a power supply line 18 connected to the driving plate 16 through the rear cover 17 of the housing 11.
In a specific implementation, the power supply line 18 is used for supplying power to the driving plate 16, a program is built in the driving plate 16 for supplying power to the coil 13, so that the coil 13 generates a magnetic field under the condition of power supply, the iron core 12 is magnetized, and the magnetic steel 14 is driven by the magnetized iron core 12 to drive the driving shaft 15 to rotate.
In a specific implementation, the rotation of the driving shaft 15 can drive the driving magnetic wheel 9 to rotate, and then drive the driven magnetic wheel 7 to rotate through the magnetic coupling effect, so that the impeller 2 is driven to rotate through the rotating driven magnetic wheel 7 to pump the medium.
In the embodiment of the invention, the driving magnetic wheel 9 and the driven magnetic wheel 7 are permanent magnetic wheels.
Referring to fig. 6-8, in some embodiments, the driving magnetomotive force wheel 9 and the driven magnetomotive force wheel 7 may each employ halbach array magnet structures, and each have oppositely disposed ferromagnetic and magnetically weakly ferromagnetic faces. The strong magnetic surfaces of the driving magnetic wheel 9 and the driven magnetic wheel 7 are oppositely arranged, and the magnetic poles of the opposite parts of the driving magnetic wheel and the driven magnetic wheel are opposite. In this way, the magnetic coupling between the driving magnetic wheel 9 and the driven magnetic wheel 7 can be improved, thereby improving the transmission torque and transmission efficiency.
In some embodiments, the driving magnet wheel 9 and the driven magnet wheel 7 each include a first magnet unit a, a second magnet unit B, a third magnet unit C, and a fourth magnet unit D sequentially arranged in the circumferential direction; and, the first, second, third and fourth magnet units a, B, C and D each include two magnets N, S of opposite magnetic properties, i.e., an N-pole magnet and an S-pole magnet.
In some embodiments, two magnets N, S in the first and third magnet units a, C may each be axially aligned and the two magnets N, S are oppositely located in the first and third magnet units a, C. Accordingly, two magnets N, S in the second and fourth magnet units B and D may each be arranged in the circumferential direction, and the positions of the two magnets N, S in the second and fourth magnet units B and D are opposite.
In some embodiments, the first, second, third and fourth magnet units a, B, C and D are sequentially circularly arranged in a circumferential direction with at least one group. For example, referring to the examples shown in fig. 6 to 8, the first, second, third, and fourth magnet units a, B, C, and D may be sequentially circularly arranged with four groups in the circumferential direction. For another example, the first, second, third, and fourth magnet units a, B, C, and D may be sequentially and circularly arranged in the circumferential direction with two, six, eight, ten, and so on groups.
In some embodiments, the first magnet unit a, the second magnet unit B, the third magnet unit C, and the fourth magnet unit D may each have a fan-shaped structure; and the inner diameter of the fan-shaped structure is less than or equal to 1mm, and the outer diameter thereof is less than or equal to 5mm.
In some embodiments, the axial pole spacing between the driving and driven magnetomotive wheels 9 and 7 may be greater than or equal to 0.5mm and less than or equal to 5mm.
In some embodiments, the first magnet unit a, the second magnet unit B, the third magnet unit C and the fourth magnet unit D in the driving magnet wheel 9 and the driven magnet wheel 7, and the N-pole magnet and the S-pole magnet in each unit may be bonded and fixed by using an adhesive.
In some embodiments, the adhesive employed may be a biocompatible adhesive.
In some embodiments, the N-pole magnet and the S-pole magnet may be made of neodymium-iron-boron N50SH, and the surfaces of the N-pole magnet and the S-pole magnet are covered with biocompatible epoxy resin films.
In some embodiments, since the medium contacted by the driven magnetic wheel 7 may have corrosiveness, the magnets in the driven magnetic wheel may be made of samarium cobalt SmCo (such as Sc2Co17, etc.), and the surfaces of the magnets are covered with biocompatible epoxy resin films, the SmCo is corrosion-resistant, so that the performance of the driven magnetic wheel is not affected by the corrosion of the medium even if the epoxy resin films are damaged. According to the embodiment of the invention, by adopting the technical scheme, the output torque and efficiency can be improved in two directions, and the magnetizing surface can be maximized in the limited space of the micropump and has ideal magnetic pole spacing, so that good magnetic pole performance and efficiency are achieved, and the torque output requirement of the micropump is fully met.
In specific implementation, by adopting the technical scheme, the output torque can be improved by approximately 40%.
Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the disclosure, even where only a single embodiment is described with respect to a particular feature. The characteristic examples provided in the present disclosure are intended to be illustrative, not limiting, unless stated differently. In practice, the features of one or more of the dependent claims may be combined with the features of the independent claims where technically possible, according to the actual needs, and the features from the respective independent claims may be combined in any appropriate way, not merely by the specific combinations enumerated in the claims.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (12)
1. The closed micropump based on magnetic drive is characterized by comprising a motor assembly, a rotating assembly connected with the motor assembly and an impeller (2) connected with the rotating assembly; the rotating assembly comprises a driving magnetic wheel (9) and a driven magnetic wheel (7) which are axially arranged at intervals; the driving magnetic wheel (9) is connected with the motor component; the driven magnetic wheel (7) is connected with the impeller (2); the driving magnetic wheel (9) is suitable for rotating under the driving of the motor assembly, and drives the driven magnetic wheel (7) to drive the impeller (2) to rotate through the magnetic coupling effect so as to pump media; the motor component and the driving magnetic wheel (9) are independently and fully sealed to isolate the medium.
2. The magnetically driven enclosed micropump according to claim 1, characterized in that it further comprises a pump housing (1) adapted to house the impeller (2) and to convey the medium, and a guide vane (5) mounted behind the pump housing (1); the front end of the pump shell (1) is provided with an inlet (19) for receiving the medium, and the periphery of the rear end of the pump shell is provided with an outlet (20) corresponding to the guide vane (5) for outputting the medium; the guide vane (5) is located behind the impeller (2) and is adapted to guide the medium to the outlet (20).
3. The magnetically driven enclosed micropump according to claim 2, further comprising an adapter cover (8) mounted behind the guide vane (5); the front end and the rear end of the transfer cover (8) are suitable for respectively defining a driven magnetic wheel cavity (31) and a driving magnetic wheel cavity (32) so as to respectively store the driven magnetic wheel (7) and the driving magnetic wheel (9), and the driven magnetic wheel (7) and the driving magnetic wheel (9) are axially isolated.
4. A magnetically driven enclosed micropump according to claim 3, characterized in that it further comprises a housing (11) mounted behind the transit cover (8); the housing (11) is adapted to enclose the motor assembly and together with the adaptor cover (8) defines the drive magnet wheel chamber (32) to enclose the drive magnet wheel (9).
5. The magnetically driven enclosed micropump according to claim 4, further comprising a driving shaft (15) and a driven shaft (3); the driving shaft (15) is supported on the shell (11) and is respectively connected with the motor assembly and the driving magnetic wheel (9); the driven shaft (3) passes through the guide vane (5) and is respectively connected with the driven magnetic wheel (7) and the impeller (2).
6. The magnetically driven enclosed micropump according to claim 1, characterized in that the driving (9) and driven (7) magnetomotive wheels each have halbach array magnet structure with their ferromagnetic faces arranged opposite and opposite poles.
7. The magnetically driven enclosed micropump according to claim 6, characterized in that the driving magnetic wheel (9) and the driven magnetic wheel (7) each comprise a first magnet unit (a), a second magnet unit (B), a third magnet unit (C) and a fourth magnet unit (D) arranged in sequence in the circumferential direction; the first magnet unit (a), the second magnet unit (B), the third magnet unit (C) and the fourth magnet unit (D) each comprise two magnets (N, S) of opposite magnetic properties; two magnets (N, S) in the first magnet unit (a) and the third magnet unit (C) are each arranged in the axial direction, and the positions of the two magnets (N, S) in the first magnet unit (a) and the third magnet unit (C) are opposite; two magnets (N, S) in the second magnet unit (B) and the fourth magnet unit (D) are each arranged in the circumferential direction, and the positions of the two magnets (N, S) in the second magnet unit (B) and the fourth magnet unit (D) are opposite.
8. The magnetically driven enclosed micropump of claim 7, wherein the first magnet unit (a), the second magnet unit (B), the third magnet unit (C) and the fourth magnet unit (D) are sequentially circularly arranged in a circumferential direction with at least one group.
9. The magnetically driven enclosed micropump of claim 7, wherein the first magnet unit (a), the second magnet unit (B), the third magnet unit (C) and the fourth magnet unit (D) are all sector structures; the inner diameter of the fan-shaped structure is smaller than or equal to 1mm, and the outer diameter of the fan-shaped structure is smaller than or equal to 5mm.
10. The magnetically driven enclosed micropump according to claim 7, characterized in that the axial distance between the driving (9) and driven (7) magnetic wheels is greater than or equal to 0.5mm and less than or equal to 5mm.
11. The closed micropump based on magnetic driving according to claim 7, wherein the magnets of the driven magnetic wheel (7) are made of neodymium-iron-boron N50SH or samarium-cobalt SmCo, and the surfaces of the magnets are covered with a biocompatible epoxy resin film.
12. A magnetically driven closed micropump according to claim 3, characterized in that the transfer cap (8) is made of a non-metallic material, including polyetheretherketone PEEK or ceramic.
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| CN202310559227.9A CN116440404B (en) | 2023-05-18 | 2023-05-18 | Closed micropump based on magnetic force drive |
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| CN202310559227.9A CN116440404B (en) | 2023-05-18 | 2023-05-18 | Closed micropump based on magnetic force drive |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151480A (en) * | 1995-11-28 | 1997-06-11 | 王晚霓 | Magnetic driving gear for pump |
| CN101820933A (en) * | 2007-10-08 | 2010-09-01 | 亚琛创意解决方案Ais有限责任公司 | Pipe guide |
| CN104373356A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院苏州生物医学工程技术研究所 | Medical semi-maglev centrifugal pump based on steel ball |
| WO2018088939A1 (en) * | 2016-11-09 | 2018-05-17 | Алексей Васильевич КОРОТЕЕВ | Microaxial pump for assisting blood circulation (variants) |
| CN110743051A (en) * | 2019-12-24 | 2020-02-04 | 丰凯医疗器械（上海）有限公司 | Quick-connection type magnetic transmission device for medical interventional instrument |
| US20200147283A1 (en) * | 2012-07-03 | 2020-05-14 | Tc1 Llc | Motor assembly for catheter pump |
| CN111770765A (en) * | 2018-01-08 | 2020-10-13 | 韦德威申思有限公司 | Heart assist device |
| CN113629974A (en) * | 2020-05-07 | 2021-11-09 | 安捷伦科技有限公司 | Air gap magnetic coupler with counteracting force |
| CN114452527A (en) * | 2022-01-26 | 2022-05-10 | 苏州心擎医疗技术有限公司 | Device for assisting the heart in the occurrence of functional failure |
| CN114870241A (en) * | 2021-12-03 | 2022-08-09 | 深圳核心医疗科技有限公司 | Drive device and blood pump |
| CN115279448A (en) * | 2019-12-03 | 2022-11-01 | 普罗西里翁公司 | Blood pump |
| CN217926339U (en) * | 2022-07-13 | 2022-11-29 | 常州欧凯电器有限公司 | Split type magnetic drive isolation pump |
| CN115463337A (en) * | 2021-07-12 | 2022-12-13 | 苏州心擎医疗技术有限公司 | Device for assisting the heart in the occurrence of functional failure |
-
2023
- 2023-05-18 CN CN202310559227.9A patent/CN116440404B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151480A (en) * | 1995-11-28 | 1997-06-11 | 王晚霓 | Magnetic driving gear for pump |
| CN101820933A (en) * | 2007-10-08 | 2010-09-01 | 亚琛创意解决方案Ais有限责任公司 | Pipe guide |
| US20200147283A1 (en) * | 2012-07-03 | 2020-05-14 | Tc1 Llc | Motor assembly for catheter pump |
| CN104373356A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院苏州生物医学工程技术研究所 | Medical semi-maglev centrifugal pump based on steel ball |
| WO2018088939A1 (en) * | 2016-11-09 | 2018-05-17 | Алексей Васильевич КОРОТЕЕВ | Microaxial pump for assisting blood circulation (variants) |
| CN111770765A (en) * | 2018-01-08 | 2020-10-13 | 韦德威申思有限公司 | Heart assist device |
| CN115279448A (en) * | 2019-12-03 | 2022-11-01 | 普罗西里翁公司 | Blood pump |
| CN110743051A (en) * | 2019-12-24 | 2020-02-04 | 丰凯医疗器械（上海）有限公司 | Quick-connection type magnetic transmission device for medical interventional instrument |
| CN113629974A (en) * | 2020-05-07 | 2021-11-09 | 安捷伦科技有限公司 | Air gap magnetic coupler with counteracting force |
| CN115463337A (en) * | 2021-07-12 | 2022-12-13 | 苏州心擎医疗技术有限公司 | Device for assisting the heart in the occurrence of functional failure |
| CN114870241A (en) * | 2021-12-03 | 2022-08-09 | 深圳核心医疗科技有限公司 | Drive device and blood pump |
| CN114452527A (en) * | 2022-01-26 | 2022-05-10 | 苏州心擎医疗技术有限公司 | Device for assisting the heart in the occurrence of functional failure |
| CN217926339U (en) * | 2022-07-13 | 2022-11-29 | 常州欧凯电器有限公司 | Split type magnetic drive isolation pump |
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|---|---|
| CN116440404B (en) | 2024-03-08 |
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