CN209187708U - A kind of axial flow blood pump led using double cantilever blade tails - Google Patents
A kind of axial flow blood pump led using double cantilever blade tails Download PDFInfo
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- CN209187708U CN209187708U CN201821416877.9U CN201821416877U CN209187708U CN 209187708 U CN209187708 U CN 209187708U CN 201821416877 U CN201821416877 U CN 201821416877U CN 209187708 U CN209187708 U CN 209187708U
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Abstract
A kind of axial flow blood pump led using double cantilever blade tails, including in casing leading, rotor and tail lead；The leading one end towards the rotor is equipped with fore bearing, the rotor is equipped with front axle towards the leading one end, one end that the rotor is led towards the tail is equipped with rear bearing, which leads towards one end of the rotor and be equipped with rear axle, which sets that there are two the rotor blades of protrusion；The tail lead periphery set there are two protrusion cantilever primary blades；The cantilever primary blades are led outer end from the tail and are extended to the rotor around the tail driving screw；It is oriented to the leading viewing from the tail, the hand of spiral of the cantilever primary blades is counter clockwise direction, and each cantilever primary blades are -64 degree to 9 degree by the spiral angle of starting point to end, contact and support with the casing inner wall on the outside of the cantilever primary blades；The end of each cantilever primary blades extends to the rotor outer periphery.The utility model is able to maintain tail and leads reliable assembling with casing, mitigates destruction of the axial flow blood pump to blood.
Description
Technical field
The utility model belongs to the field of medical instrument technology, and especially a kind of axis led using double cantilever blade tails is bled
Pump.
Background technique
Implantation heart chamber auxiliary pump is a kind of effective means for extending terminal phase patients with heart failure life, and heart chamber auxiliary pump can make
The preload of heart declines, and promotes the recovery of myocardial metabolism and cardiac function, or the blood-pumping function of substitution nature heart.Ventricle
Auxiliary pump has pulsation type and two kinds rotary by the type of flow, and axial flow blood pump is one kind of rotary heart chamber auxiliary pump, and feature is
It is small in size and easily implant, it is the most heart chamber auxiliary pump of number of applications in the world so far.The blood mistake of axial flow blood pump
Stream unit mainly include it is leading, rotor, tail is led and casing, main connection type use mechanical bearing.Rotor is rotated to be mentioned to blood
For kinetic energy, improves blood flow and blood pressure rises.Tail, which is led, to be play a part of to improve pressure, rectification, and cantilevered paddle is that tail leads use
A kind of structure type.It is connected between conventional mechanical bearings formula axial flow blood pump is leading, rotor and tail are led by mechanical bearing, between existing
Gap has thrombosed risk.The further optimization design of axial flow blood pump mainly solves the problems, such as to pump interior thrombosis, reduces and pump
Interior low velocity flow region, make to pump interior blood flow it is more unobstructed be reduce pump in thrombosis risk main means.In order to make
Tail, which is led, to be firmly secured on casing, need to guarantee to have biggish contact area between blade and casing, so using outstanding
The tail of arm-type blade construction, which is led, mostly uses 3 or more blades, however, leading interior runner quantity, blood which adds tail
The more risk for increasing Blood damage is contacted with the pump housing.
Utility model content
The purpose of the utility model is to provide a kind of axial flow blood pumps led using double cantilever blade tails, can reduce blade
Consistency reduces runner quantity, so that blood is more smooth when being led by blood pump tail, while large range of blade angle ensure that blade
There is longer fitting surface between casing, tail is kept to lead the reliable assembling with casing, mitigate destruction of the axial flow blood pump to blood.
To achieve the above object, the utility model takes following technical scheme:
A kind of axial flow blood pump led using double cantilever blade tails, including a casing, be successively arranged in the casing it is leading, turn
Son and tail are led；
The leading one end towards the rotor is equipped with fore bearing, which is equipped with front axle towards the leading one end, before this
Axis and the fore bearing are rotatablely connected；The rotor is equipped with rear bearing towards one end that the tail is led, which leads one end towards the rotor
Equipped with rear axle, the rear axle and the rear bearing are rotatablely connected；
The rotor be in shuttle shape, periphery set there are two protrusion rotor blade；The rotor blade is from close to the leading one end
It leads to the tail and extends around the rotor helical-screw；From this it is leading lead viewing to the tail, the hand of spiral of the rotor blade is side clockwise
To；
The tail lead periphery set there are two protrusion cantilever primary blades；The cantilever primary blades from the tail lead outer end to the rotor around
The tail driving screw extends；It is oriented to the leading viewing from the tail, the hand of spiral of the cantilever primary blades is counter clockwise direction, and each outstanding
Arm primary blades are -64 degree to 9 degree by the spiral angle of starting point to end, are contacted on the outside of the cantilever primary blades with the casing inner wall
It supports；The end of each cantilever primary blades extends to the rotor outer periphery.
Further, the leading periphery is equipped with several straight leading blades, each leading blade end and the casing
Inner wall contact is supported.
Further, cantilever primary blades end stretches between two rotor tips.
It, can be with the beneficial effects of the utility model are: the axial flow blood pump that the utility model is led using double cantilever blade tails
It reduces solidity of blades, reduce runner quantity, so that blood is more smooth when being led by blood pump tail, while large range of blade angle is protected
Having demonstrate,proved has longer fitting surface between blade and casing, tail is kept to lead the reliable assembling with casing, mitigates axial flow blood pump to blood
The destruction of liquid.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the axial flow blood pump that the utility model is led using double cantilever blade tails.
Fig. 2 is the structural schematic diagram that the tail for the axial flow blood pump that the utility model is led using double cantilever blade tails is led.
Specific embodiment
The utility model is described in detail below by way of specific embodiment, however not to limit the utility model
Practical range.
As Figure 1-Figure 2, the utility model provides a kind of axial flow blood pump led using double cantilever blade tails, including one
Casing (meaning not shown) is successively arranged leading 1, rotor 2 in the casing and tail leads 3.Coil, silicon steel sheet etc. are equipped with outside the casing
Make the structure that rotor is able to rotate, is the prior art, therefore details are not described herein.
Leading 1 periphery is equipped with several straight leading blades 11, contacts and supports with casing inner wall.Leading 1 direction should
One end of rotor 2 be equipped with fore bearing 4, the rotor 2 towards leading 1 one end be equipped with front axle 5, the front axle 5 with 4 turns of the fore bearing
Dynamic connection.The rotor 2 is equipped with rear bearing 6 towards one end that the tail leads 3, which leads 3 and be equipped with rear axle 7 towards one end of the rotor 2,
The rear axle 7 and the rear bearing 6 are rotatablely connected.
The rotor 2 be in shuttle shape, periphery set there are two protrusion rotor blade 21.The rotor blade 21 from close to this leading 1
One end lead 3 to the tail and extended spirally around the rotor 2.Leading 13 viewings are led to the tail from this, the spiral side of the rotor blade 21
To for clockwise.
The tail is led 3 peripheries and is set there are two the cantilever primary blades 31 of protrusion, and blade cantilever can reduce the linear velocity of impeller clearance
To reduce the high shear force of blood receiving, to reduce the haemolysis risk of axial flow blood pump.The cantilever primary blades 31 are led outside 3 from the tail
It holds and leads 3 around the tail to the rotor 2 and extend spirally.3 are led to leading 1 viewing, the hand of spiral of the cantilever primary blades 31 from the tail
For counterclockwise, and each cantilever primary blades 31 by starting point to end spiral angle be -64 spend to 9 degree, the cantilever main lobe
It contacts and supports with the casing inner wall on the outside of piece, the end of each cantilever primary blades 31 extends to 2 periphery of rotor.Preferably, this is outstanding
31 end of arm primary blades stretches between two 21 ends of rotor blade, can make blood preferably along rotor blade 21 in this way
Guiding swimmingly flows to tail and leads 3, reduces flow resistance, improves the working efficiency of axial flow blood pump.
The tail for the axial flow blood pump that the utility model is led using double cantilever blade tails, which is led, only possesses 2 cantilever blades, the number of blade
Tail guide vane consistency can be reduced less, so that runner is more unobstructed, reduce the Blood damage in pump；It is to pass through that the tail of axial flow blood pump, which is led,
Together with the blade tip face of blade is interference fitted with casing inner wall, cooperate due to only having the blade tip of 2 blades and casing, it is difficult to guarantee
The stability and reliability of the interference fit, and then to increase blade greatly long for the blade angle variation range of the blade of the utility model
Degree, increases the contact area of blade tip and casing, to increase the reliability of interference fit.In addition, the utility model
The cantilever primary blades 31 quantity be two panels, it is symmetrical at equal intervals.It is such to design so that cantilever primary blades 31 are with blood
Contact area it is small, the natural route for being oriented to blood to it according to rotor 2 flows, due to taking full advantage of blood of human body
The thrust of itself can reduce the thrust of blade, give full play to the rectified action that tail is led, and improve axial flow blood pump working efficiency.
The utility model is defined by claim.But it is based on this, those skilled in the art can make
Various obvious variations or change, all should be within the main spirits and protection scope of the utility model.
Claims (3)
1. a kind of axial flow blood pump led using double cantilever blade tails, which is characterized in that including a casing, successively set in the casing
There are leading, rotor and tail to lead；
The leading one end towards the rotor be equipped with fore bearing, the rotor towards the leading one end be equipped with front axle, the front axle with
Fore bearing rotation connection；The rotor is equipped with rear bearing towards one end that the tail is led, which leads towards one end of the rotor and be equipped with
Rear axle, the rear axle and the rear bearing are rotatablely connected；
The rotor be in shuttle shape, periphery set there are two protrusion rotor blade；The rotor blade from close to the leading one end to this
Tail is led to be extended around the rotor helical-screw；From this it is leading lead viewing to the tail, the hand of spiral of the rotor blade is clockwise；
The tail lead periphery set there are two protrusion cantilever primary blades；The cantilever primary blades lead outer end to the rotor around the tail from the tail
Driving screw extends；The leading viewing is oriented to from the tail, and the hand of spiral of the cantilever primary blades is counterclockwise and each cantilever master
Blade is -64 degree to 9 degree by the spiral angle of starting point to end, cantilever primary blades outside contacted with the casing inner wall to
Top；The end of each cantilever primary blades extends to the rotor outer periphery.
2. the axial flow blood pump according to claim 1 led using double cantilever blade tails, it is characterised in that: the leading periphery
Equipped with several straight leading blades, each leading blade end is contacted with the casing inner wall and is supported.
3. the axial flow blood pump according to claim 1 or 2 led using double cantilever blade tails, it is characterised in that: the cantilever
Primary blades end stretches between two rotor tips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821416877.9U CN209187708U (en) | 2018-08-30 | 2018-08-30 | A kind of axial flow blood pump led using double cantilever blade tails |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821416877.9U CN209187708U (en) | 2018-08-30 | 2018-08-30 | A kind of axial flow blood pump led using double cantilever blade tails |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209187708U true CN209187708U (en) | 2019-08-02 |
Family
ID=67405357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821416877.9U Active CN209187708U (en) | 2018-08-30 | 2018-08-30 | A kind of axial flow blood pump led using double cantilever blade tails |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209187708U (en) |
-
2018
- 2018-08-30 CN CN201821416877.9U patent/CN209187708U/en active Active
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