CN209019545U - Blood pump device - Google Patents
Blood pump device Download PDFInfo
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- CN209019545U CN209019545U CN201721094232.3U CN201721094232U CN209019545U CN 209019545 U CN209019545 U CN 209019545U CN 201721094232 U CN201721094232 U CN 201721094232U CN 209019545 U CN209019545 U CN 209019545U
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Abstract
The utility model provides a kind of blood pump device.Blood pump device includes: shell, with flow channels and the entrance and exit being connected to respectively with flow channels；Rotor assembly is rotatably arranged in flow channels；Coil is arranged in the side wall of shell；First permanent magnetic portion is located at the inside of rotor assembly；Second permanent magnetic portion, is arranged in the side wall of shell, and the first permanent magnetic portion and the second permanent magnetic portion form radial permanent magnet bearing；The inside of the rotor of rotor assembly is arranged in magnetic steel of motor；The periphery of coil is arranged in magnetic defense portion, wherein magnetic defense portion and magnetic steel of motor collective effect provide axial pre tightening force for rotor assembly.The technical solution of the utility model provides radial support power using radial permanent magnet bearing for rotor assembly, and provides axial pre tightening force by the collective effect in magnetic defense portion and magnetic steel of motor for rotor assembly, to support rotor assembly in the axial direction.
Description
Technical field
The utility model relates to the field of medical instrument technology, in particular to a kind of blood pump device.
Background technique
In the prior art, heart failure (Heart failure) abbreviation heart failure, it is popular for be that nature heart can not pump
Enough blood flows of systemic blood circulation are maintained out.Show that there are about 15%~20% people to suffer from according to World Health Organization WTO statistics
There are different degrees of heart failure, total 50% or more the number of hospitalized of the number Zhan that over-65s are hospitalized by heart failure, while dying of illness after 5 years
Rate is more than 50%.For patients with heart failure, only conservative drug treatment, heart transplant and ventricle assist three kinds of therapy approach.
The effect of drug therapy is poor, and heart transplant is extremely difficult since donor is limited, ventricular assist device (Ventricular
Assist Device, VAD) become all kinds of most effective therapy approach of terminal phase heart failure that the whole world is generally acknowledged.Ventricular assist device
Main component be a blood pump (Blood Pump).Usually by the flow ipe of blood pump and human heart left ventricle or right ventricle
It is connected, is connected by outflow pipeline with aorta or pulmonary artery, pump is connected with control driver (having power supply equipment), by
Controlling the output of driver control blood pump has certain pressure (generally in 80~120mmHg) and flow (generally in 2~10L/min)
Blood, share human normal activity to the power demand of human heart.It is auxiliary to be divided into left ventricle according to the cardiac position that blood pump assists
Help (LVAD), right ventricle auxiliary (RVAD) and biventricular assist (BiVAD).Blood pump from the pulsation type Pulsating Flow blood pump of earliest period by
The rotary continuous flow blood pump of gradual transition till now, enters into clinic from laboratory already in American-European countries.First generation pulsation type blood
It pumps and ratified to carry out BTT bridging therapy (bridge-to-transplant) via FDA in 1994.DeBakey axial-flow
LVAD is first rotary blood pump that clinical trial is carried out in Europe and the U.S., and HeartMate II is first by FDA batches
The mutatis mutandis rotary blood pump in BTT, the approval time is 2008.Common Jarvik2000 and HeartMate II using
Mechanical bearing support, HeartWare using liquid bearing and Permanent-magnet bearing combined support, HeartMate III and
DuraHeart is active magnetic over draft support.
Currently, rotary blood pump is generally divided into two main components of shell and vane rotor, vane rotor is intracorporal in shell
Spring bearing can be divided into mechanical bearing, dynamic pressure liquid bearing, actively or passively several big types of formula magnetic bearing；Mechanical bearing
Operating stablizes but is also easy to produce thrombus while can wear；Dynamic pressure liquid bearing must just can be in rotor high speed rotation
Generation effect, limits blood pump speed adjustable range；Active magnetic bearing is because sensor etc. will be introduced, volume and the opposite increasing of power consumption
Greatly；Passive type magnetic bearing can not achieve the stable suspersion of full freedom degree, need to use with other forms bearing fit.
There is a kind of rotary blood pump in the prior art, which provides suspension by magnetic suspension bearing for rotor
Power, the magnetic line of force that coil generates easily leaks out, thus the efficiency of motor is lower；Moreover, the blood pump had both been mentioned using radial permanent magnet bearing
Radial support is provided again for axial pre tightening force, and the size of blood pump is larger, and reliability is lower.
Utility model content
The main purpose of the utility model is to provide a kind of blood pump device, which is using radial permanent magnet bearing
Rotor assembly provides radial support power, and is provided by the collective effect in magnetic defense portion and magnetic steel of motor for rotor assembly
Axial pre tightening force supports rotor assembly with flow deflector collective effect in the axial direction.
To achieve the goals above, the utility model provides a kind of blood pump device, and blood pump device includes: shell, has
Flow channels and the entrance and exit being connected to respectively with flow channels；Rotor assembly is rotatably arranged in flow channels；
Coil is arranged in the side wall of shell；First permanent magnetic portion is located at the inside of rotor assembly；Second permanent magnetic portion, is arranged in shell
In side wall, the first permanent magnetic portion and the second permanent magnetic portion form radial permanent magnet bearing；The rotor of rotor assembly is arranged in magnetic steel of motor
It is internal；The periphery of coil is arranged in magnetic defense portion, wherein magnetic defense portion and magnetic steel of motor collective effect are rotor assembly
Axial pre tightening force is provided.
Further, shell has central axis, on the direction for being parallel to central axis, the close entrance of magnetic steel of motor
End face and magnetic defense portion close entrance end face between there is interval H, to pass through magnetic defense portion and magnetic steel of motor
Collective effect provides axial pre tightening force for rotor assembly.
Further, have between the end face of the separate entrance of the end face and magnetic defense portion of the separate entrance of magnetic steel of motor
Interval or concordant setting.
Further, shell includes: sleeve, including sleeve body and interior bone, in the internally positioned through-hole of rotor assembly；
Spiral case, with sleeve connection, spiral case has the chamber being connected to interior bone for collecting and rectifying the blood for flowing through sleeve, spiral case
Body；Wherein, interior bone and cavity form flow channels, and entrance is provided on sleeve, and outlet is provided on spiral case, in entrance
There is angle between heart line and the center line of outlet.
Further, it being equipped with the first cone structure in the cavity of spiral case, the first cone structure is correspondingly arranged with rotor assembly,
And first has interval between cone structure and rotor assembly.
Further, magnetic defense portion and the second permanent magnetic portion are each provided in the side wall of sleeve, blood pump device further include: first
Without magnetic portion, it is located at the internal rotor of rotor assembly；Second, without magnetic portion, is located in the side wall of sleeve；Wherein, along the flowing side of fluid
To first is successively spaced setting without magnetic portion, magnetic steel of motor and the first permanent magnetic portion；Second without magnetic portion, coil and the second permanent magnetic portion according to
Minor tick setting.
Further, the side wall of sleeve include inner wall and with the spaced outer wall of inner wall, formed between inner wall and outer wall
Annular space, coil, magnetic defense portion and the second permanent magnetic portion are arranged in annular space.
Further, blood pump device further includes the flow-guiding structure being arranged in flow channels, and flow-guiding structure is located at inlet,
The end face towards flow-guiding structure of rotor assembly is equipped with the second cone structure cooperated with flow-guiding structure.
Further, flow-guiding structure includes multiple flow deflectors, the circumferentially spaced sleeve that shell is arranged in of multiple flow deflectors
Inner wall on.
Further, along the flow direction of fluid, the end face of close entrance and the leaning on for the second permanent magnetic portion of the first permanent magnetic portion
The end face of nearly entrance is concordantly arranged, and the end face of the separate entrance of the end face and the second permanent magnetic portion of the separate entrance of the first permanent magnetic portion is flat
Neat setting.
Further, rotor assembly includes rotor and one or more blade for being arranged on rotor, works as rotor assembly
When including multiple blades, multiple blades are provided at circumferentially spaced around rotor.
Further, magnetic defense portion is made of soft magnetic materials.
Using the technical solution of the utility model, radial support power is provided for rotor assembly using radial permanent magnet bearing, and
And axial pre tightening force is provided for rotor assembly by the collective effect in magnetic defense portion and magnetic steel of motor, with flow deflector cooperation from
And rotor assembly is supported in the axial direction, in this way, generating axial pretightening using the axialy offset of magnet ring in compared with the existing technology
Power can provide biggish axial force, and the magnet ring of identical size using magnetic steel of motor and magnetic defense portion in the application
The smaller radial rigidity of axialy offset amount is bigger, and the length of entire blood pump can in this way reduced, and structure is more compact, and radial direction is more
Stablize.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings:
Fig. 1 shows the blood pump apparatus structure schematic diagram of the utility model embodiment one；
Fig. 2 shows the blood pump apparatus structure schematic diagrams of the utility model embodiment two；
Fig. 3 shows the structural schematic diagram of the embodiment one of the spiral case of the blood pump device of Fig. 1；And
Fig. 4 shows the structural schematic diagram of the embodiment two of the spiral case of the blood pump device of Fig. 1.
Wherein, the above drawings include the following reference numerals:
10, shell；11, flow channels；12, entrance；13, it exports；14, spiral case；141, bottom wall；15, the first cone structure；
16, sleeve；20, rotor assembly；21, third cone structure；23, rotor；22, the second cone structure；30, coil；31, magnetic anti-
Shield portion；40, magnetic steel of motor；41, third permanent magnetic portion；42, the first permanent magnetic portion；43, the 4th permanent magnetic portion；44, the second permanent magnetic portion；45,
First without magnetic portion；46, second without magnetic portion；50, flow-guiding structure；60, conducting wire.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
In order to solve to provide radial support in the prior art simultaneously using radial permanent magnet bearing for rotor assembly and axial direction is pre-
Clamp force causes blood pump device length longer, and the larger problem of volume, the utility model changes the structure of blood pump device
Into specific as follows:
Embodiment one:
As shown in Figure 1, Figure 3 and Figure 4 shown in, the blood pump device of the present embodiment one include shell 10, rotor assembly 20, coil 30,
Magnetic steel of motor 40, the first permanent magnetic portion 42 being arranged in inside rotor assembly 20 and the second permanent magnetic portion being arranged in 10 side wall of shell
44.Shell 10 has flow channels 11 and the entrance 12 being connected to respectively with flow channels 11 and outlet 13.Rotor assembly 20 can
It is rotatably arranged in flow channels 11；Coil 30 is arranged in the side wall of shell 10, and magnetic steel of motor 40 is arranged in rotor assembly
20 inside.In addition, the blood pump device of the present embodiment further includes magnetic defense portion 31, coil 30 is arranged in magnetic defense portion 31
Periphery, wherein magnetic defense portion 31 and 40 collective effect of magnetic steel of motor are that rotor assembly 20 provides axial pre tightening force.
By above-mentioned setting, the application, which is provided by radial permanent magnet bearing for rotor assembly 20, can be suspended in balance
The radial forces of position, and be that rotor assembly 20 provides axially in advance by magnetic defense portion 31 and 40 collective effect of magnetic steel of motor
Clamp force.In this way, being respectively that rotor assembly 20 provides radial support and axial support by different structural members, on the one hand can be
On the other hand rotor assembly 20, which provides bigger axial pre tightening force, can make radial support more reliable.Because in the prior art,
Merely with radial permanent magnet bearing simultaneously it is that rotor assembly 20 provides radial support and axial pre tightening force, and the magnet ring axis of identical size
It is bigger to the smaller radial rigidity of amount of bias, in this way, forming the axial inclined of the magnet ring of radial permanent magnet bearing to improve radial rigidity
The amount of setting meeting very little, it is difficult to provide biggish axial pre tightening force for rotor assembly；If in order to provide biggish axial pre tightening force, just
The axialy offset amount of magnet ring must be allowed to become larger, thus will increase the length dimension of entire blood pump, and radial support power is also not steady enough
It is fixed.The technical solution of the application solves the disadvantages mentioned above of the prior art, has both made the length dimension of pump smaller, structure is more stepped up
It gathers, and provides more stable radial support power for rotor assembly 20.
Further, magnetic defense portion 31 is located in the side wall of shell 10, the material saturated magnetization in magnetic defense portion 31
In strength range, the magnetic line of force inside blood pump device can form closed loop inside magnetic defense portion 31, therefore will not generate leakage field.
Due to the rotary motion of rotor assembly 20 be generated under the collective effect of coil 30 and magnetic steel of motor 40, so, by upper
Setting is stated, the utilization rate of 40 magnetic line of force of coil 30 and magnetic steel of motor is improved, to improve the working efficiency of magnetic steel of motor 40；
In addition, leading to the size of the current or voltage to coil 30 by adjusting, the revolving speed of rotor assembly 20 can be made in a big way
It adjusts, adapts to the demand of different patients to export different flow pressures.
Magnetic defense portion 31 is made of soft magnetic materials.Soft magnetic materials is referred to when magnetization occurs in Hc no more than 1000A/
M, such material become soft magnetic bodies.Under normal conditions, soft magnetic materials is ferro-silicium and various soft magnetic ferrites etc..It is preferred that
Ground, magnetic defense portion 31 are made of magnet.Since magnetic defense portion 31 is a kind of magnetic permeability soft magnetic materials more much higher than air,
Either interior magnetic field or external magnetic field, in the material saturation magnetization range in magnetic defense portion 31, the magnetic of the generation of coil 30
The line of force can form closed loop inside magnetic defense portion 31, therefore will not generate leakage field.Specifically, magnetic defense portion 31 is axial set
Cylinder, coil 30 are located at the inside of axial sleeve.
Specifically, rotor assembly 20 includes rotor 23 and one or more blade being arranged on rotor 23, works as rotor
When component 20 includes multiple blades, multiple blades are provided at circumferentially spaced along rotor 23.Preferably, blade is helical form, spiral
The blade of shape is axially extending along rotor 23.The rotation of blade can be flowed through blood after flow channels 11 simultaneously by the suction of entrance 12
Blood is sent out with certain pressure and flow from outlet 13；Moreover, wanting small to the destruction of blood after setting blade.
In the present embodiment one, blood pump device further includes controller and conducting wire connected to the controller 60.Rotor assembly 20
Rotary motion is generated under the collective effect of the magnetic steel of motor 40 in the coil 30 and rotor assembly 20 in shell 10, and control is driven
Dynamic signal is passed to by conducting wire 60, and the revolving speed of rotor assembly 20 can be adjusted in a big way, to export different flows
Pressure.
As shown in Figure 1, shell 10 has central axis in the embodiments of the present invention one, it is being parallel to central axis
Direction on, have between the end face of the close entrance 12 of the end face and magnetic defense portion 31 of the close entrance 12 of magnetic steel of motor 40
It is spaced H, provides axial pre tightening force as rotor assembly 20 using the collective effect by magnetic defense portion 31 and magnetic steel of motor 40.
Specifically, magnetic defense portion 31 is a kind of soft magnetic materials, and magnetic steel of motor 40 is a kind of hard magnetic material, is produced therebetween
The raw magnetic force to attract each other, when magnetic steel of motor 40, which is located at magnetic defense portion 31 axial, to be hit exactly, i.e. the center of magnetic steel of motor 40
When axis is overlapped with the central axis in magnetic defense portion 31, axial magnetic between the two is 0.
As shown in Figure 1, the position of magnetic steel of motor 40 is more biased towards Z axis positive direction compared to magnetic defense portion 31, then magnetic defense
Portion 31 makes it towards the attraction of Z axis negative direction the generation of rotor assembly 20, and as rotor assembly 20 provides axial pre tightening force, from
And rotor assembly 20 is made to axially retain stable suspersion state.Meanwhile if rotor assembly 20 is occurred by axial impact force position
Offset, after axial impact force disappears, which can guarantee that rotor assembly 20 is restored to initial position.
As shown in Figure 1, the end face of the separate entrance 12 of magnetic steel of motor 40 and magnetism are anti-in the embodiments of the present invention one
There is interval between the end face of the separate entrance 12 in shield portion 31.
In the utility model embodiment one, the end face of the close entrance 12 of magnetic steel of motor 40 is close with magnetic defense portion 31
There is interval H between the end face of entrance 12, the end face of separate the entrance 12 of magnetic steel of motor 40 and magnetic defense portion 31 it is separate enter
There is interval, i.e. magnetic steel of motor 40 and magnetic defense portion 31 is biasing, therefore, motor magnetic in the axial direction between the end face of mouth 12
Steel 40 is located at two end faces that are oppositely arranged of the inside in magnetic defense portion 31 without protruding from magnetic defense portion 31, by upper
State setting, 31 collective effect of magnetic steel of motor 40 and magnetic defense portion, so as to provide for rotor assembly 20 towards Z axis negative direction
Axial pre tightening force.
In this way, can be provided using the collective effect in magnetic steel of motor 40 and magnetic defense portion 31 for rotor assembly 20 sufficiently large
Axial pre tightening force, without generating axial pre tightening force and radial direction using the axialy offset of magnet ring as in the prior art
Support, it is difficult to while guaranteeing radial stable and sufficiently large axial pre tightening force is provided, the blood pump in the technical solution of the application
Radial permanent magnet bearing provides radial rigidity, and radial support is more stable；Moreover, the blood pump device length size of the application compared with
Small, structure is more compact.
It certainly, can also be by the separate entrance 12 of magnetic steel of motor 40 in the unshowned alternate embodiment of the utility model
End face concordant with the end face of separate entrance 12 in magnetic defense portion 31 be arranged.
As shown in Figure 1, shell 10 includes sleeve 16 and spiral case 14 in the embodiments of the present invention one.Sleeve 16 includes
Sleeve body and interior bone, in the internally positioned through-hole of rotor assembly 20；Spiral case 14 is connect with sleeve 16, and spiral case 14 is for collecting
With the blood for flowing through sleeve 16, spiral case 14 has the cavity being connected to interior bone.Wherein, the interior bone of sleeve 16 and
Cavity forms flow channels 11, and entrance 12 is provided on sleeve 16, and outlet 13 is provided on spiral case 14, the center line of entrance 12 with
There is angle between the center line of outlet 13.
By above-mentioned setting, the advantages of which combines axial-flow pump in the prior art and centrifugal pump, i.e., in this programme
Blood pump device be a mixed-flow pump, the blood for entering shell 10 by entrance 12 can be accelerated and be changed through exporting
The flow direction of the blood of 13 outflows, meanwhile, gather that axial-flow pump diameter is small and centrifugal pump rectifies flow-pressure diagram,
It is set more to meet Human Physiology requirement.As shown in Figure 1, being equipped with first in the cavity of spiral case 14 in the embodiments of the present invention
Cone structure 15, the first cone structure 15 are correspondingly arranged to limit the limit position of the axial movement of rotor assembly 20 with rotor assembly 20
It sets, and there is interval between the flow direction of fluid, the first cone structure 15 and rotor assembly 20.
By above-mentioned setting, the first cone structure 15 can be made due to by axial impact due to its conical properties to Z axis
20 automatic centering of forward migration rotor assembly can not only play the role of limit, but also can play centrifugation and arrange streamline
Function carries out rectification and centrifugal action to the fluid for flowing through sleeve 16.
Specifically, one end towards spiral case 14 of the rotor 23 of rotor assembly 20 is equipped with third cone structure 21, the first cone
Body structure 15 is correspondingly arranged with third cone structure 21, on the one hand can limit the limit position that entire rotor assembly 20 moves axially
It sets, on the other hand the liquid for flowing through sleeve 16 can be arranged, while playing centrifugal action.Moreover, the first cone structure
Should be there are enough gaps, in this way, after the two contact is upper between 15 and third cone structure 21, the direction of axial pre tightening force
It is still along Z axis negative direction.
As shown in Figure 1, along the flow direction of fluid, the end face of the close entrance 12 of the first permanent magnetic portion 42 and the second permanent magnetic portion
The end face of 44 close entrance 12 is concordantly arranged, and the end face of the separate entrance 12 of the first permanent magnetic portion 42 is remote with the second permanent magnetic portion 44
End face from entrance 12 is concordantly arranged.In this way, the radial permanent magnet bearing that the first permanent magnetic portion 42 and the second permanent magnetic portion 44 are formed is only
Rotor assembly 20 provides radial support.
Certainly, in the alternate embodiment that the utility model does not provide, the first permanent magnetic portion 42 and the second permanent magnetism can also be made
Portion 44 is the biasing (end of the separate entrance of the end face of the separate entrance of the first permanent magnetic portion 42 and the second permanent magnetic portion 44 in the axial direction
There is interval between face), i.e. the first permanent magnetic portion 42 is relative to the second permanent magnetic portion 44 closer to entrance 12.
As shown in figure 3, spiral case 14 includes bottom wall 141 and the side wall connecting with bottom wall 141.The setting of first cone structure 15 exists
On bottom wall 141, the surface towards rotor assembly 20 of bottom wall 141 is obliquely installed.The surface surrounds the first cone structure 15
Spiral decline, in this way, the surface can play buffering and rectified action after the blood for flowing through sleeve 16 enters spiral case 14, so that
Be centrifuged deflecting at spiral case 14 along the axial liquid stream of sleeve 16 when into blood pump is when radially screwing out, and flow-pressure diagram changes
It is more gentle.
Fig. 4 shows the structural schematic diagram of another embodiment of spiral case 14, unlike Fig. 3, the bottom wall of spiral case 14
141 surface towards rotor assembly 20 is plane.
As shown in Figure 1, magnetic defense portion 31 and the second permanent magnetic portion 44 are each provided at sleeve in the embodiments of the present invention one
In 16 side wall, blood pump device further include first without magnetic portion 45 and second without magnetic portion 46.First is located at rotor assembly without magnetic portion 45
Inside 20 rotor 23, second is located in the side wall of sleeve 16 without magnetic portion 46.Wherein, along the flow direction of fluid, first without magnetic
Portion 45, magnetic steel of motor 40 and the first permanent magnetic portion 42 are successively spaced setting；Second without magnetic portion 46, coil 30 and the second permanent magnetic portion 44,
Successively interval setting.
Specifically, it is equipped with two groups of permanent magnetic rings in the first permanent magnetic portion 42, is equipped with two groups of permanent magnetic rings in the second permanent magnetic portion 44,
First without not setting permanent magnetic ring in magnetic portion 45, second without not setting permanent magnetic ring, the first permanent magnetic portion 42 and the second permanent magnetism in magnetic portion 46
Permanent magnetic ring interaction in portion 44, forms radial permanent magnet bearing, for the radial force that rotor assembly 20 provides, guarantees to turn enough
The radial rigidity of sub-component 20 makes rotor assembly 20 be suspended in equilbrium position.By above-mentioned setting, guaranteeing rotor assembly 20 just
Often under the premise of operating, package assembly is simpler, and weight is lighter.It is without magnetic portion 45 and the second saying without magnetic portion 46 using first
In order to emphasize that the front end of the coil 30 of blood pump device described in Fig. 2 is not provided with magnet ring, the front end of magnetic steel of motor 40 does not also set magnet ring.
Certainly, in the alternate embodiment that the utility model does not provide, can also use according to actual needs 3 groups and its with
On the interaction of multiple groups permanent magnetic ring, provide radial rigidity for rotor assembly 20.
As shown in Figure 1, the side wall of sleeve 16 includes inner wall and is arranged with inner wall interval in the embodiments of the present invention one
Outer wall, annular space is formed between inner wall and outer wall, coil 30, magnetic defense portion 31 and the second permanent magnetic portion 44 are arranged at ring
In shape space.
Above-mentioned setting structure is simple, easy to process.
As shown in Figure 1, blood pump device further includes that leading in flow channels 11 is arranged in the embodiments of the present invention one
Flow structure 50, flow-guiding structure 50 are located at inlet, and the end face towards flow-guiding structure 50 of rotor assembly 20 is equipped with and water conservancy diversion knot
The second cone structure 22 that structure 50 cooperates.
Specifically, the blood that flow-guiding structure 50 flows into inlet rectifies, and plays support to rotor assembly 20
Effect.In this way, be that rotor assembly 20 provides the radial forces that can be suspended in equilbrium position by radial permanent magnet bearing,
And be that rotor assembly 20 provides axial pretightening by magnetic defense portion 31 and 40 collective effect of magnetic steel of motor, pass through flow-guiding structure 50
Support force is provided to rotor assembly 20, therefore, it is rotor assembly that the technical solution of the present embodiment passes through different structural members respectively
20 provide radial support and axial support, on the one hand can provide bigger axial pre tightening force for rotor assembly 20, on the other hand,
Radial support can be made more reliable.
As shown in Figure 1, flow-guiding structure 50 includes multiple guide vanes, multiple water conservancy diversion leaves in the embodiments of the present invention
On the circumferentially spaced inner wall that sleeve 16 is set of piece.
Specifically, after blood pump device uses the several years, the contact surface of guide vane and the second cone structure 22 can be ground
Damage, due to the design feature of the second cone structure 22 and the presence of axial pre tightening force, between rotor assembly 20 and guide vane
It can pre-tighten automatically, all use the blood pump of mechanical bearing to need to increase the shortcomings that elasticity pre-tightens element so as to avoid both ends, reduce
Failure risk.It is multiple that the quantity of guide vane can be two, three, four etc., and guide vane does not constitute full circle.In rotor assembly
In rotary course, it will form certain haemocyte on the second cone structure 22 and guide vane contact surface and accumulate, but with rotation
Turn, the contact surface of the second cone structure 22 and guide vane will become non-contact face, and the haemocyte of accumulation can also be flowed through non-connect
The blood of contacting surface washes away, so as to avoid the easily thrombosed problem of common mechanical formula bearing.
Embodiment two:
In the utility model embodiment two, embodiment two and embodiment one the difference is that:
In embodiment two not set first without magnetic portion 45 and second without magnetic portion 46, but third permanent magnetic portion 41 and the 4th is set
Permanent magnetic portion 43.Along the flow direction of fluid, i.e., along shown in Fig. 2, third permanent magnetic portion 41, magnetic steel of motor 40 and the first permanent magnetic portion 42 according to
Minor tick setting；4th permanent magnetic portion 43, coil 30 and the second permanent magnetic portion 44 are successively spaced setting.Third permanent magnetic portion 41 and the 4th is forever
Magnetic portion 43 includes two groups of permanent magnetic rings.
Certainly, in the alternate embodiment that the utility model does not provide, third permanent magnetic portion 41 and the 4th permanent magnetic portion 43 can also
With use according to actual needs 3 groups and its more than the interaction of multiple groups permanent magnetic ring, provide radial rigidity for rotor assembly 20.
The other structures of the present embodiment two are identical as embodiment, and details are not described herein again.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of blood pump device, which is characterized in that the blood pump device includes:
Shell (10), with flow channels (11) and the entrance (12) being connected to respectively with the flow channels (11) and outlet
(13)；
Rotor assembly (20) is rotatably arranged in the flow channels (11)；
Coil (30) is arranged in the side wall of the shell (10)；
First permanent magnetic portion (42), is located at the inside of the rotor assembly (20)；
Second permanent magnetic portion (44) is arranged in the side wall of the shell (10), and first permanent magnetic portion (42) and described second is forever
Magnetic portion (44) forms radial permanent magnet bearing；
Magnetic steel of motor (40) is arranged in the inside of the rotor assembly (20)；
Magnetic defense portion (31) is arranged in the periphery of the coil (30), and the magnetic defense portion (31) is located at the shell
(10) in side wall, the shell (10) has central axis, on the direction for being parallel to the central axis, the motor magnetic
Steel (40) close to the entrance (12) end face and the magnetic defense portion (31) close to the entrance (12) end face it
Between there is interval H, with by the collective effect of the magnetic defense portion (31) and the magnetic steel of motor (40) for the rotor set
Part (20) provides axial pre tightening force；
The end face of separate entrance (12) of the magnetic steel of motor (40) enters far from described in the magnetic defense portion (31)
There is interval or concordant setting between the end face of mouth (12)；
The shell (10) includes:
Sleeve (16), including sleeve body and interior bone, the rotor assembly (20) are located in the interior bone；
Spiral case (14) is connect with the sleeve (16), and the spiral case (14) is used to collect and rectification flows through the sleeve (16)
Blood, the spiral case (14) have the cavity that is connected to the interior bone, the spiral case (14) include bottom wall (141) and with institute
The side wall of bottom wall (141) connection is stated, the surface towards the rotor assembly (20) of the bottom wall (141) is obliquely installed；
Wherein, the interior bone and the cavity are formed the flow channels (11), and the entrance (12) is provided with the set
On cylinder (16), the outlet (13) is provided on the spiral case (14), the center line of the entrance (12) and the outlet (13)
Center line between have angle；
The magnetic defense portion (31) and second permanent magnetic portion (44) are each provided in the side wall of the sleeve (16), the blood pump
Device further include:
First without magnetic portion (45), and the rotor (23) for being located at the rotor assembly (20) is internal；
Second, without magnetic portion (46), is located in the side wall of the sleeve (16)；
Wherein, along the flow direction of fluid, described first without magnetic portion (45), the magnetic steel of motor (40) and first permanent magnetic portion
(42) successively interval setting；Described second is successively spaced without magnetic portion (46), the coil (30) and second permanent magnetic portion (44)
Setting.
2. blood pump device according to claim 1, which is characterized in that be equipped with the first cone in the cavity of the spiral case (14)
Structure (15), first cone structure (15) is correspondingly arranged with the rotor assembly (20), and first cone structure
(15) there is interval between the rotor assembly (20).
3. blood pump device according to claim 1, which is characterized in that the side wall of the sleeve (16) include inner wall and with institute
The spaced outer wall of inner wall is stated, forms annular space, the coil (30), the magnetism between the inner wall and the outer wall
Protection department (31) and second permanent magnetic portion (44) are arranged in the annular space.
4. blood pump device according to claim 1, which is characterized in that the blood pump device further includes being arranged in the overcurrent
Flow-guiding structure (50) in channel (11), the flow-guiding structure (50) are located at the entrance (12), the rotor assembly (20)
The end face towards the flow-guiding structure (50) be equipped with the second cone structure (22) for cooperating with the flow-guiding structure (50).
5. blood pump device according to claim 4, which is characterized in that the flow-guiding structure (50) includes multiple flow deflectors,
Multiple flow deflectors are circumferentially spaced to be arranged on the inner wall of the sleeve (16) of the shell (10).
6. blood pump device according to claim 1, which is characterized in that along the flow direction of fluid, first permanent magnetic portion
(42) the end face close to the entrance (12) is concordant with the close end face of the entrance (12) of second permanent magnetic portion (44)
Setting, the end face far from the entrance (12) of first permanent magnetic portion (42) is with second permanent magnetic portion (44) far from described
The end face of entrance (12) is concordantly arranged.
7. blood pump device according to claim 1, which is characterized in that the rotor assembly (20) includes rotor (23) and sets
One or more blade on the rotor (23) is set, it is more when the rotor assembly (20) includes multiple blades
A blade being provided at circumferentially spaced around the rotor (23).
8. blood pump device according to claim 1, which is characterized in that the magnetic defense portion (31) is by soft magnetic materials system
At.
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| CN201721094232.3U CN209019545U (en) | 2017-08-29 | 2017-08-29 | Blood pump device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109420207A (en) * | 2017-08-29 | 2019-03-05 | 航天泰心科技有限公司 | Blood pump device |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109420207A (en) * | 2017-08-29 | 2019-03-05 | 航天泰心科技有限公司 | Blood pump device |
| CN109420207B (en) * | 2017-08-29 | 2024-02-20 | 航天泰心科技有限公司 | Blood pump device |
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