CN108175884A - Heart chamber auxiliary pump - Google Patents
Heart chamber auxiliary pump Download PDFInfo
- Publication number
- CN108175884A CN108175884A CN201810027488.5A CN201810027488A CN108175884A CN 108175884 A CN108175884 A CN 108175884A CN 201810027488 A CN201810027488 A CN 201810027488A CN 108175884 A CN108175884 A CN 108175884A
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- China
- Prior art keywords
- impeller
- magnet ring
- fluid bearing
- heart chamber
- wall
- 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.)
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- 210000005242 cardiac chamber Anatomy 0.000 title claims abstract description 42
- 239000012530 fluid Substances 0.000 claims description 63
- 230000000694 effects Effects 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 10
- 239000008280 blood Substances 0.000 abstract description 17
- 210000004369 blood Anatomy 0.000 abstract description 17
- 238000010586 diagram Methods 0.000 description 9
- 230000005484 gravity Effects 0.000 description 9
- 238000005192 partition Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000004087 circulation Effects 0.000 description 4
- 230000017531 blood circulation Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 206010018910 Haemolysis Diseases 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 208000007536 Thrombosis Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000008588 hemolysis Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 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
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
-
- 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
- A61M60/178—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
-
- 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
-
- 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
- A61M60/226—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 radial components
- A61M60/232—Centrifugal 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
- A61M60/40—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
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/422—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being electromagnetic, e.g. using canned motor 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
- A61M60/80—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
-
- 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
- A61M60/824—Hydrodynamic or fluid film bearings
-
- 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
- A61M2210/00—Anatomical parts of the body
- A61M2210/12—Blood circulatory system
- A61M2210/125—Heart
Abstract
This application involves a kind of heart chamber auxiliary pumps, including drainage cone, impeller, motor, determine magnet ring and dynamic magnet ring, may be contained with upper-part in hollow housing, the housing is additionally provided with entrance and exit.Entrance described in the drainage cone face.The impeller is simultaneously sheathed on the drainage cone, inside sets runner.The rotor of the motor is fixedly arranged on the impeller.When the motor drives the wheel rotation, the pair of magnet ring is for so that the impeller causes the impeller to be in suspended state in the axial direction in suspended state, the stator and the rotor radially.Herein described heart chamber auxiliary pump is simple in structure, small volume, has higher blood compatibility.
Description
Technical field
This application involves medical instruments field more particularly to a kind of heart chamber auxiliary pumps.
Background technology
Heart chamber auxiliary pump is that a kind of draw blood by venous system or heart is pumped directly into arterial system, partly or entirely
The artificial mechanism device to do work instead of ventricle.To improve blood compatibility, the side effect of clinical treatment is reduced, ventricle assists at present
The development trend of pump is using non-contact type bearing technology.Its feature is to realize the outstanding of impeller and rotor using physics mode
It is floating.Due to not being in direct contact between rotor and stator in the operation of impeller, it is thus possible to it is auxiliary to maximally reduce ventricle
Destruction of the pump to blood is helped, and effectively reduces the generation of thrombus and haemolysis, there is reliability height and long lifespan, be suitble to length
Phase is implanted into human body.
The general requirement of heart chamber auxiliary pump is lightweight, miniaturization, low-power consumption and simple in structure, disclosure satisfy that operation
Requirement and improve implantation after patient comfort level.For this purpose, impeller does not use machine driving mostly in existing heart chamber auxiliary pump
Mode, but rotated using suspended pattern, to save the occupied space of transmission mechanism, further compression volume.
There are many current impeller suspended modes, but existing suspended pattern is often there are end clearance is small, blood compatibility is poor,
Or multiple displacement sensors and independent active levitation driving coil is needed to assist, lead to the complicated of heart chamber auxiliary pump,
The shortcomings that size and weight are big, and reliability reduces, and power consumption and cost also accordingly increase.Further, if such suspension mechanism
It is arranged according to axial manner, it will the axial dimension of heart chamber auxiliary pump is caused to increase, is unfavorable for minimizing.
Invention content
The application be designed to provide it is a kind of take into account blood compatibility and miniaturization heart chamber auxiliary pump, it is simple in structure,
Has higher reliability.The application heart chamber auxiliary pump includes following technical solution：
A kind of heart chamber auxiliary pump including drainage cone, impeller, motor, determines magnet ring and dynamic magnet ring；The impeller set is set on described
Drainage cone is peripheral, sets runner in the impeller, the runner forms radial passage in the impeller；The motor is used to drive
The wheel rotation；Described to determine magnet ring and the dynamic magnet ring and be distributed along the radial direction of the impeller, described to determine magnet ring fixed
In the drainage cone, the dynamic magnet ring is fixedly arranged on the impeller, and the magnetic pole for determining magnet ring and the dynamic magnet ring is towards identical, institute
It states and determines magnet ring and the dynamic magnet ring cooperation so that the relatively described drainage cone of the impeller is in suspended state radially.
Wherein, the heart chamber auxiliary pump includes hollow housing, and inside is cavity, is divided into epicoele and cavity of resorption, the cavity
Connect the entrance and exit of the hull outside；The motor includes stator and rotor, and the drainage cone and the impeller are located at
The epicoele, the stator are fixedly arranged on the cavity of resorption.
Wherein, on the axis direction perpendicular to the impeller, the epicoele includes the first inner wall close to the entrance
With the second inner wall far from the entrance；The impeller includes first face opposite with first inner wall and with described the
The second opposite face of two inner walls；The heart chamber auxiliary pump further includes a thrust fluid bearing, the thrust fluid bearing setting
Between first inner wall and first face or the thrust fluid bearing is set to second inner wall and described second
Between face；The thrust fluid bearing and the motor collective effect, so that in the axial direction in outstanding during the wheel rotation
Floating state.
Wherein, the thrust fluid bearing is two, is divided into lifting force fluid bearing and lower thrust fluid bearing, it is described on
Thrust fluid bearing is between first inner wall and first face；The lower thrust fluid bearing is located in described second
Between wall and second face, the lifting force fluid bearing, the lower thrust fluid bearing and the motor collective effect, with
So that suspended state is in during the wheel rotation in the axial direction.
Wherein, the thrust fluid bearing is set on first inner wall and/or second inner wall of the housing.
Wherein, on the axis direction of the impeller, the rotor is contained in the dynamic magnet ring in the impeller.
Wherein, on the axis direction of the impeller, the rotor is between the runner and second face.
Wherein, on the axis direction of the impeller, the dynamic magnet ring also is located between the runner and second face.
Wherein, the axial magnet of the rotor including spaced setting and tangential magnet, the axial magnet and described
Tangential magnet is sector, and the axial magnet at least sets two, and the magnetic pole of two axial magnets is reversed each other.
Wherein, the outlet is set on the side wall between first inner wall and second inner wall.
Herein described heart chamber auxiliary pump, by the inner cavity of the housing by the partition board be divided into the epicoele and it is described under
Chamber, wherein the cavity of resorption is used to seal the stator of the motor, the rotor and the impeller in the epicoele
Fixed, the rotor coordinates with the stator, and the suspension of the impeller in the axial direction is realized in rotation.It is described by being fixed on
Drainage cone on it is described determine magnet ring, with the cooperation for the dynamic magnet ring being fixed on the impeller so that the impeller is rotating
The suspensions of Shi Shixian radially.Coordinate on entrance and exit setting and the drainage cone, the impeller on the housing
Described runner etc. is formed together the circulation path of blood.Herein described heart chamber auxiliary pump is simple in structure, small volume, to described
Entrance and the specific location of the outlet are not particularly limited, and can be adapted to according to the installation site and use demand of product
The entrance of all directions and the design of the outlet, have higher compatibility.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of the application heart chamber auxiliary pump；
Fig. 2 is the detail view of the application heart chamber auxiliary pump middle magnetic ring；
Fig. 3 is the schematic diagram of one embodiment of the application thrust fluid bearing；
Fig. 4 is the schematic diagram of another embodiment of the application thrust fluid bearing；
Fig. 5 is the schematic diagram of the application impeller shape；
Fig. 6 is the schematic diagram of the application impeller internal details；
Fig. 7 is the schematic diagram of one embodiment of the application impeller channel shape；
Fig. 8 is the schematic diagram of another embodiment of the application impeller channel shape；
Fig. 9 is the schematic diagram of the application impeller channel shape another embodiment；
Figure 10 is the principle schematic of the application rotor magnetic ring；
Figure 11 is the schematic diagram of the application rotor magnetic ring arrangement.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only the part of the embodiment of the application, instead of all the embodiments.Base
Embodiment in the application, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiments shall fall in the protection scope of this application.
Shown heart chamber auxiliary pump 100 is please referred to Fig.1, including housing 10, drainage cone 20, impeller 30, motor 40, determines magnet ring
51 and dynamic magnet ring 52.The housing 10 includes hollow inner cavity and the entrance 11 of the connection inner cavity and outlet 12.The shell
Partition board 13 is additionally provided in the inner cavity of body, the inner cavity of the housing 10 is divided into epicoele 14 and cavity of resorption 15 by the partition board 13.It is described enter
Mouth 11 connects the epicoele 14 with the outlet 12.The drainage cone 20 is set in the epicoele 14, the drainage cone 20
It is connected with the partition board 13, and entrance 11 described in 20 faces of the drainage cone.The impeller 30 is ring-type, and the impeller 30 is arranged
In on the drainage cone 20, it is clearance fit that the impeller 30 bores 20 with the drainage, and the impeller 30 bores 20 with the drainage
It does not contact.Runner 31 is set in the impeller 30, the runner 31 connects cricoid inner ring and the outer of the impeller 30, i.e., described
Runner 31 forms the channel for the radial direction for penetrating through the impeller 30 in the impeller 30.The motor 40 includes stator 41 and rotor
42.Winding is set in the stator 41, the stator 41 is set in the cavity of resorption 15.The partition board 13 is by the stator 41 and institute
The sealing of epicoele 14 is stated to separate.The rotor 42 is permanent magnet, and the rotor 42 is fixedly arranged on the impeller 30.It is described to determine magnet ring 51
It is fixedly arranged on the drainage cone 20, the dynamic magnet ring 52 is fixedly arranged on the impeller 30, and the dynamic magnet ring 52 and the rotor
42 coaxial arrangements.The outer diameter of the dynamic magnet ring 52 is less than or equal to the internal diameter of the rotor 42, i.e., in the impeller 30 radially,
The dynamic magnet ring 52 is located at the inner ring of the impeller 30 compared to the rotor 42.See Fig. 2, it is described to determine magnet ring 51 and the dynamic magnetic
The magnetic pole of ring 52 is axial distribution, i.e., described itself the N pole for determining magnet ring 51 and the dynamic magnet ring 52 and S are extremely along respective axis
To distribution.By it is described determine magnet ring 51 for, the N poles for determining magnet ring 51 are located at described one end determined on 51 axial direction of magnet ring, S
Pole is located at the other end determined on 51 axial direction of magnet ring.It is described to determine magnet ring 51 and the direction of the magnetic pole of the dynamic magnet ring 52 is equal
It is identical, so that the state determined magnet ring 51 and be in homopolar-repulsion relatively with the dynamic magnet ring 52.The drainage cone 20 and institute
It states impeller 30 and keeps clearance fit therewith.It should be mentioned that in herein described heart chamber auxiliary pump 100, the drainage cone
20th, the impeller 30, the stator 41, the rotor 42, it is described determine magnet ring 51 and the dynamic magnet ring 52, with axis 001
It is coaxially disposed for the center of circle.
When the application heart chamber auxiliary pump 100 works, the motor 50 is powered, described to drive the impeller 30 along the axis
The direction of line 001 is suspended in the epicoele 14.With the curent change of the motor 50, the impeller 30 is in the epicoele 14
Interior rotation.Specifically, the coil in the stator 51 being fixedly arranged in the cavity of resorption 15 is powered, and generate magnetic field.With the leaf
The connected rotor 52 of wheel 30 rotates under the action of the magnetic field around the axis 001.The gravity of the impeller 30 and institute
It states the axial magnetic that rotor 30 is subject to mutually to balance so that the impeller 30 is suspended in described on the direction of the axis 001
In epicoele 14.And in the impeller 30 radially, due to the cooperation for determining magnet ring 51 and the dynamic magnet ring 52, the impeller
30 keep clearance fit state namely the impeller 30 diametrically opposed in described with the drainage cone 20 always in rotation
Drainage cone 20 is in suspended state.The impeller 30 is axially and radially all in suspended state as a result, not with the shell
Body 10, the drainage cone 20 etc. generate any contact, and rotation is kept under the action of the motor 40.
The blood being pressurized is needed to be flowed into the epicoele 14 at the entrance 11, by institute after the drainage cone 20 is encountered
Drainage cone 20 is stated to disperse and drain into the impeller 30 of rotation.Specifically, blood by the runner 31 from the leaf
The inside of the impeller 30 is flowed through at the inner ring of wheel 30, the outer of the impeller 30 is finally flowed out from the runner 31.Blood exists
It is accelerated under the action of the impeller 30 persistently rotated, has bigger when from the 12 outflow housing 10 of outlet
Speed and pressure so as to achieve the effect that supercharging, realize the function of ventricle auxiliary.Since the suspension of the impeller 30 is set, this
Apply for heart chamber auxiliary pump 100 during the work time, internal any two component, being capable of maximum limit all without being in direct contact
Destruction of the reduction of degree to blood, effectively reduces the generation of thrombus and haemolysis, has the advantages that reliability height and long lifespan, fits
Conjunction is chronically implanted human body.
It should be mentioned that in the present embodiment, the partition board 13 is employed inside the housing 10 to separate on described
Chamber 14 and the cavity of resorption 15.In remaining some embodiment, the separation of the epicoele 14 and the cavity of resorption 15 can not also use
The partition board 13, but the mutually independent epicoele 14 and the cavity of resorption 15 is set to combine to form the housing 10.At this
It is the top plate of bottom plate by the epicoele 14 or the cavity of resorption 15 between epicoele 14 and the cavity of resorption 15 described in kind of embodiment
It separates.Also a kind of embodiment, the motor 40, specifically, the shell of the stator 41 is in the inner cavity of the housing 10
The middle separation function for forming the epicoele 14 and the cavity of resorption 15.To point of institute's epicoele 14 and the cavity of resorption 15 in application scheme
Every being not particularly limited, as long as the sealing of the stator 41 can be realized, ensure the normal work of the motor 40.
In one embodiment, the shape of the epicoele 14 and the impeller 30 cooperates.Perpendicular to the axis
On 001 direction, the epicoele 14 is included in the first inner wall 141 close to the entrance 11 and second far from the entrance 11
Wall 142.Also include on the impeller 30 first face 32 opposite with first inner wall 141 and with second inner wall 142
The second opposite face 33.The shape of first inner wall 141 and the form fit in first face 32, second inner wall 142
Shape and first face 33 form fit, the shape collective effect being mutually matched at two is to prevent the impeller 30 from turning
Occur larger turbulent flow during dynamic, and then influence the suspended state of the impeller 30.
Further, the form fit for the shape of first inner wall 141 and first face 32 and described the
The shape of two inner walls 142 and the form fit in first face 33, in one embodiment, will in the heart chamber auxiliary pump 100
Wherein at least a pair of of form fit is set as thrust fluid bearing 60.Namely the thrust fluid bearing 60 is set to described first
Between inner wall 141 and first face 32 or the thrust fluid bearing 60 is set to second inner wall 142 and described second
Between face 33.The Hydrodynamic suspension principle of the thrust fluid bearing 60, is shown in Fig. 3, Fig. 4, is that rule are set in fluid flow path
Guide groove 61 then, the guide groove 61 are uniformly distributed along the circumference around the center of the thrust fluid bearing 60, are generated in being flowed using liquid
Regular, uniform thrust realizes driven suspension of the impeller 30 in 100 inner cavity of heart chamber auxiliary pump.Another kind description
Mode, the impeller 30 is under the magneticaction of the rotor 42 and the stator 41, then is aided with the thrust fluid bearing 60
Thrust so that the suspended state when impeller 30 overcomes its own gravity and realizes rotation in the epicoele 14.Another
Brief description mode is the thrust fluid bearing 60 and 40 collective effect of motor, so that the impeller 30 is turning
Suspended state when dynamic in axial direction.
It should be understood that when the thrust fluid bearing 60 be set to first inner wall 141 and first face 32 it
Between when, the impeller 30 is by the thrust of the thrust fluid bearing 60 and the thrust and its own gravity of the motor 40.This
Three power mutually balance on the direction of the axis 001, to realize the suspension of the impeller 30；When the thrust fluid bearing
60 when being set between second inner wall 142 and second face 33, and the impeller 30 is by the thrust fluid bearing 60
Thrust and the motor 40 thrust or pulling force and its own gravity.These three power are mutual on the direction of the axis 001
Balance, to realize the suspension of the impeller 30.
It should be mentioned that when the thrust fluid bearing 60 is set to second inner wall 142 and second face 33
Between when, thrust or pulling force that the motor 40 is shown, depending on 30 its own gravity of impeller and the thrust hydraulic pressure
The thrust size of bearing 60.When its own gravity of the impeller 30 is more than the thrust of the thrust fluid bearing 60, the electricity
Machine 40 shows as thrust, the thrust of the motor 40 and the thrust collective effect of the thrust fluid bearing 60, described to overcome
The gravity of impeller 30 realizes the suspended state of the impeller 30；When its own gravity of the impeller 30 is less than the thrust hydraulic pressure
During the thrust of bearing 60, the motor 40 shows as pulling force, and the pulling force of the motor 40 and its own gravity of the impeller 30 are total to
Same-action, to overcome the thrust of the thrust fluid bearing 60, so as to fulfill the suspended state of the impeller 30.
More again, the suspended state of the impeller 30 is not the suspension of constant position.In the rotation process of the impeller 30
In, probably due to the influence of the factors such as the variation of rotating speed or the mutation of moment stress, and generate to the thrust fluid bearing 60
Disturbance.The impeller 30 will deviate on the direction of the axis 001 at this time.When the impeller 30 deviates
When, the thrust fluid bearing 60 and the stator 41 can be because the distance with the impeller 30 change, and generate corresponding
Thrust variation.When the impeller 30 and the thrust fluid bearing 60 close to when, what the impeller 30 was subject to pushes away from described
The thrust of power fluid bearing 60 will become larger, and the impeller 30 is pushed away the thrust fluid bearing 60, the leaf by the thrust to become larger
Wheel 30, which is able to come back to initial equilbrium position, to be rotated further.Likewise, when the impeller 30 to the stator 41 close to when,
The magnetic fields that the impeller 30 is subject to also bigger, so as in the collective effect of the stator 41 and the thrust fluid bearing 60
Under be pushed back initial equilbrium position to be rotated further.Vice versa.
In one embodiment, two thrust fluid bearings 60 are set simultaneously in the heart chamber auxiliary pump 100, this
Shi Suoshu thrusts fluid bearing 60 is divided into lifting force fluid bearing 62 and lower thrust fluid bearing 63.The lifting force hydraulic axis
62 are held between first inner wall 141 and first face 32, the lower thrust fluid bearing 63 is located in described second
Between wall 142 and second face 33.It is the lifting force fluid bearing 62, described it should be understood that in this embodiment
Lower thrust fluid bearing 63 and 40 collective effect of motor, so that along the axis 001 when the impeller 30 rotates
Suspended state is on direction.
In order to further compress the axial dimension of the heart chamber auxiliary pump 100, the thrust fluid bearing 60 can be with
It is directly arranged on first inner wall 141 and/or second inner wall 142 of the housing 10.I.e. when the thrust hydraulic pressure
When there are one 60, bearings, the thrust fluid bearing 60 is arranged on its corresponding inner wall, is avoided because setting is individual
The thrust fluid bearing 60 and the waste for causing axial space.It is when the thrust fluid bearing 60 is two, then described to push away
Power fluid bearing 60 is respectively arranged on first inner wall 141 and second inner wall 142.
It should be noted that in the embodiment of Fig. 3, Fig. 4, the shape of the guide groove 61 is respectively screw type and herringbone
Type, but in further embodiments, the shape of the guide groove 61 can also be some other embodiments.As long as meet center pair
Claim distribution, be capable of providing blood flow path and scheme described herein can be realized with rule, uniform deflecting.
On the other hand, the guide groove 61 of the thrust fluid bearing 60 can both be set to the side of the impeller 30,
I.e. described first face 32 and/or 33 side of the second face；It can be set to again on the epicoele 14, i.e., described first inner wall
141 and/or 142 side of the second inner wall.Also or, all correspondence is set on two opposite faces of the impeller 30 and the epicoele 14
Put the guide groove 61 of mutual cooperation.On i.e. described first face 32 and first inner wall 141 and/or second face 33 with
The guide groove 61 coordinated in pairs is both provided on second inner wall 142, is pushed away described in the conduct of the guide groove 61 being arranged in pairs
Power fluid bearing 60 works in the application heart is auxiliary pump.For the specific installation position of the guide groove 61, the application is not done
It is particularly limited to.
A kind of embodiment, in order to avoid the rotor 42 being set on the impeller 30 and the dynamic magnet ring 52 are to described
The influence of the rotational action of impeller 30, particularly when the rotor 42 and the dynamic magnet ring 52 protrude from first face 32 or institute
When stating the second face 33, the rotor 42 will generate the operation of the thrust fluid bearing 60 with the dynamic magnet ring 52 uncontrollable
Interference generates barrier to cause turbulent flow to the blood flow path of rule.In this regard, on the direction of the axis 001, by described in
Rotor 42 is disposed as flushing or be contained within the impeller 30 with the dynamic magnet ring 52 so that first face 32 or described
Second face 33 is able to be set as plane or the aforementioned form of the guide groove 61 of rule being previously mentioned.Another describing mode, described turn
Son 42 on the direction along the axis 001, is contained in the impeller 30 with the dynamic magnet ring 52.
About setting of the rotor 42 in the impeller 30, in order to reduce the power of the motor 40, further contract
The volume of small the application heart chamber auxiliary pump 100, the rotor 42 preferably close proximity to the stator 41, with shorten the rotor 42 with
The distance between described stator 41 improves electromagnetic induction efficiency.In one embodiment, the rotor 42 is in the impeller 30
On 001 direction of axis, between the runner 31 and second face 33.I.e. relative to the runner 31, described turn
Son 42 is closer to the stator 41.The blood flowed in the runner 31 at this time is in the stator 41 towards the rotor 42
It circulates on extending direction, the electromagnetic induction between the stator 41 and the rotor 42 will not be deadened.
On the other hand, the channel (see Fig. 5) due to the runner 31 in the impeller 30 for radially conducting, for blood
Flowing.When then the dynamic magnet ring 52 is in the inner ring in the rotor 42, the dynamic magnet ring 52 is in the side of the axis 001
A part of volume of the impeller 30 can only be occupied upwards, and the feeder connection for the runner 31 concedes space.It can be seen from the above,
The rotor 42 on 001 direction of the axis of the impeller 30 between the runner 31 and second face 33, if
The dynamic magnet ring 52 is between the runner 31 and first face 32, then the runner 31 is in the direction of the axis 001
On, feeder connection and channel outlet will appear difference in height.The feeder connection and channel outlet of i.e. described runner 31 be not same
In plane.Such design causes the circulation path of blood certain change, enters compared to channel in the same plane
For mouth and channel outlet, a part of pressurization energy in the heart chamber auxiliary pump 100 is consumed changing in blood flow path
In change.For this purpose, in a kind of embodiment, the dynamic magnet ring 52 is also arranged between the runner 31 and second face 33, i.e.,
The circulation path of the runner 31 can be disposed on the same plane, and be more advantageous to the flowing of blood (see Fig. 6).
The shape of the runner 31 is set, sees Fig. 7 to Fig. 9, the shape setting of the common runner 31 can be
Three kinds of linear type, eccentric straight-line type and streamline channel.The number of blade of the impeller 30 is generally between 4 to 8.Certainly,
The application does citing example at this, in other embodiments, the concrete shape of the runner 31 or the impeller 30
Blade quantity can also be adjusted freely.
Setting for the rotor 42, in some embodiments, the rotor 42 combine shape by pairs of sector electromagnet
Into.The sector electromagnet includes the axial magnet 421 of spaced setting and tangential magnet 422.It should be understood that the axial direction
Magnet 421 is magnet of the magnetic pole along 001 directional spreding of axis, and the tangential magnet 422 is magnetic pole along the impeller 30
Circumferentially distributed magnet.The axial magnet 421 is to be arranged in pairs, and the axial magnet 421 with the tangential magnet 422
It is arranged at intervals with the tangential magnet 422, two neighboring 421 magnetic pole of the axial magnet being arranged in pairs is reversed each other, simultaneously
Two neighboring tangential 422 magnetic pole of magnet being arranged in pairs is also reversed each other.Such setting is able to set the rotor 42
Halbach (Halbach) magnetic array is set to, principle is shown in Figure 10.Increased using axial magnet and longitudinal being staggered for magnet
Magnetic field intensity on strong unit direction, in order to generate most strong magnetic field with minimal amount of magnet.Such setting further carries
The high efficiency of the motor 40, the volume of reduction the application heart chamber auxiliary pump 100.
In the signal of Figure 11, the axial magnet 421 and the tangential magnet 422 are 4 pairs.To described in the application
Axial magnet 421 and the particular number of the tangential magnet 422 are not restricted, in other embodiments, the axial magnetic
Iron 421 and the quantity of the tangential magnet 422 can be arbitrary logarithms.As long as the scheme that can form Halbach magnetic array all belongs to
In the application range claimed.
For the setting of the outlet 12, since the runner 31 in the impeller 30 is radial flow path, by described
The blood that impeller 30 flows out after being pressurized is flowed out from the circumference outer of the impeller 30.It is a kind of in order to obtain preferable supercharging effect
In embodiment, the outlet 12 is set on the side wall directly between first inner wall 141 and second inner wall 142, with
The epicoele 14 can be more smoothly being flowed out after pressurization convenient for blood, is avoiding being lost because of the mutation of circulation path
Flow velocity or pressure.
Embodiments described above does not form the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical solution
Within enclosing.
Claims (10)
1. a kind of heart chamber auxiliary pump, it is characterised in that：
Including drainage cone, impeller, motor, determine magnet ring and dynamic magnet ring；
The impeller set is set on the drainage cone periphery, sets runner in the impeller, the runner forms diameter in the impeller
To access；
The motor is used to drive the wheel rotation；
It is described to determine magnet ring and the dynamic magnet ring and be distributed along the radial direction of the impeller, it is described to determine magnet ring and be fixedly arranged on the drainage
Cone, the dynamic magnet ring are fixedly arranged on the impeller, the magnetic pole for determine magnet ring and the dynamic magnet ring towards identical, it is described determine magnet ring with
The dynamic magnet ring cooperation is so that the relatively described drainage cone of the impeller is in suspended state radially.
2. heart chamber auxiliary pump as described in claim 1, it is characterised in that：
The heart chamber auxiliary pump includes hollow housing, and inside is cavity, is divided into epicoele and cavity of resorption, and the cavity connects the shell
Entrance and exit outside body；
The motor includes stator and rotor, and the drainage cone and the impeller are located at the epicoele, and the stator is fixedly arranged on institute
State cavity of resorption.
3. heart chamber auxiliary pump as claimed in claim 2, it is characterised in that：
On the axis direction perpendicular to the impeller, the epicoele is included close to the first inner wall of the entrance and far from described
Second inner wall of entrance；The impeller includes first face opposite with first inner wall and opposite with second inner wall
The second face；
The heart chamber auxiliary pump further includes a thrust fluid bearing, the thrust fluid bearing be set to first inner wall with
Between first face or the thrust fluid bearing is set between second inner wall and second face；
The thrust fluid bearing and the motor collective effect, so that being in suspension during the wheel rotation in the axial direction
State.
4. heart chamber auxiliary pump as claimed in claim 3, it is characterised in that：The thrust fluid bearing is two, is divided into lifting force
Fluid bearing and lower thrust fluid bearing, the lifting force fluid bearing is between first inner wall and first face；
The lower thrust fluid bearing between second inner wall and second face, the lifting force fluid bearing, it is described under
Thrust fluid bearing and the motor collective effect, so that being in suspended state during the wheel rotation in the axial direction.
5. heart chamber auxiliary pump as claimed in claim 4, it is characterised in that：The thrust fluid bearing is set to the institute of the housing
It states on the first inner wall and/or second inner wall.
6. the heart chamber auxiliary pump as described in any one of Claims 1 to 5, it is characterised in that：On the axis direction of the impeller, institute
Rotor is stated to be contained in the impeller with the dynamic magnet ring.
7. heart chamber auxiliary pump as described in claim 1, it is characterised in that：On the axis direction of the impeller, the rotor position
Between the runner and second face.
8. heart chamber auxiliary pump as claimed in claim 7, it is characterised in that：On the axis direction of the impeller, the dynamic magnet ring
It also is located between the runner and second face.
9. heart chamber auxiliary pump as described in claim 1, it is characterised in that：The rotor includes the axial magnet of spaced setting
With tangential magnet, the axial magnet and the tangential magnet are sector, and the axial magnet at least sets two, two institutes
The magnetic pole for stating axial magnet is reversed each other.
10. heart chamber auxiliary pump as claimed in claim 3, it is characterised in that：The outlet is set on first inner wall and described the
On side wall between two inner walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810027488.5A CN108175884A (en) | 2018-01-11 | 2018-01-11 | Heart chamber auxiliary pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810027488.5A CN108175884A (en) | 2018-01-11 | 2018-01-11 | Heart chamber auxiliary pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108175884A true CN108175884A (en) | 2018-06-19 |
Family
ID=62550401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810027488.5A Pending CN108175884A (en) | 2018-01-11 | 2018-01-11 | Heart chamber auxiliary pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108175884A (en) |
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| CN109876218A (en) * | 2019-03-28 | 2019-06-14 | 哈尔滨理工大学 | A kind of Implanted ventricular assist device |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| CN112516455A (en) * | 2020-11-18 | 2021-03-19 | 深圳核心医疗科技有限公司 | Pump body and ventricular assist system |
| WO2021073420A1 (en) * | 2019-10-18 | 2021-04-22 | 上海微创心力医疗科技有限公司 | Impeller assembly and suspension-type blood pump |
| EP3741401A4 (en) * | 2018-12-12 | 2021-09-29 | Shenzhen Core Medical Technology Co.,Ltd. | Ventricular assistance device |
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| CN114796846A (en) * | 2021-12-03 | 2022-07-29 | 深圳核心医疗科技有限公司 | Blood pump and driving device thereof |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| 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 |
| WO2023226910A1 (en) * | 2022-05-23 | 2023-11-30 | 航天泰心科技有限公司 | Magnetic levitation centrifugal pump |
| US11964145B2 (en) | 2020-07-13 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
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| US11717670B2 (en) | 2017-06-07 | 2023-08-08 | Shifamed Holdings, LLP | Intravascular fluid movement devices, systems, and methods of use |
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| WO2023226910A1 (en) * | 2022-05-23 | 2023-11-30 | 航天泰心科技有限公司 | Magnetic levitation centrifugal pump |
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Address after: 518000 factory building a qiugu 202, fengyeyuan industrial plant, Liuxian Er Road, Xingdong community, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Core Medical Technology Co., Ltd. Address before: 518000 Guangdong Shenzhen City, Shenzhen Nanshan District Taoyuan Street Li Shan Road University City Pioneer Park 1106 room Applicant before: Shenzhen core medical equipment Co., Ltd. |
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