CN2412579Y - Centrifugal blood flow pump for left heart auxiliary system - Google Patents
Centrifugal blood flow pump for left heart auxiliary system Download PDFInfo
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- CN2412579Y CN2412579Y CN 00204599 CN00204599U CN2412579Y CN 2412579 Y CN2412579 Y CN 2412579Y CN 00204599 CN00204599 CN 00204599 CN 00204599 U CN00204599 U CN 00204599U CN 2412579 Y CN2412579 Y CN 2412579Y
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- blood pump
- pump
- permanent
- magnet
- blood
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Abstract
The utility model provides a centrifugal blood flow pump for a left heart auxiliary system, which adopts a permanent magnet shaft coupling as power transmission, wherein, the driving side of the shaft coupling is arranged on a motor shaft while the passive side of the shaft coupling is connected with the rotor of the blood flow pump and the blood transmitted by the pump is not contacted with outside. In particular, the rotor of the blood pump adopts a permanent magnet suspension bearing mechanism to replace the traditional bearing and shaft sealing structure and only a little of the bottom of the rotor of the blood pump is arranged on the bottom of a pump casing to reduce the opportunity of the blood cell being ground, and therefore, the blood flow pump has the advantages of high safety and long service life.
Description
This utility model belongs to the medical equipment that transfers the body medium, relates to the significant improvement of the blood pump that is applied to left heart aid system.
Left side heart aid system blood pump (hereinafter to be referred as blood pump) is usually said " artificial heart ", is the medical equipment of realizing the extracorporeal circulation of human or animal's blood.Basic demand to blood pump is safe, reliable, easy and simple to handle, long service life.
A kind of centrifugal blood flow pump structure of prior art as shown in Figure 2.Wherein adopted the permanent magnetic coupling transmission.During this blood pump work, motor 24 drives master end 25 rotations of permanent magnetic coupling, by the magnetic field coupling, the and then rotation synchronously of the slave end 26 of permanent magnetic coupling, because blood pump rotor 27, epitrochanterian blade 28 and permanent magnetic coupling slave end 26 threes combine as a whole, so blood pump rotor 27 and pump leaf 28 be rotation thereupon also, the inlet 23 of blood by pump housing top is drawn in the pump housing, the outlet 29 from the pump housing one side is discharged to the downstream again.The blood pump rotor is with motionless central shaft 210 location, the lower end of central shaft 210 is fixed on the pump housing, the bearing group 22 that is contained in central shaft 210 upper ends directly links with the blood pump rotor, in order to stop and to reduce the blood and the quantity thereof of infiltrating in the bearing group 22, is provided with axle envelope 211 on central shaft 210.The shortcoming of this blood pump of prior art is: the bearing in the bearing group can pulverize infiltration blood cell wherein when moving, and causes to use the patient of this blood pump to produce blood clotting in its blood vessel, thereby causes serious consequence.Though the axle envelope has reduced the blood flow volume that infiltrates bearing, can not stop fully.Axle envelope itself is a kind of rotary dynamic seal simultaneously, also can pulverize blood cell here.And because the heating and the wearing and tearing of axle envelope will produce mechanical admixture and sneak in the blood.These defectives make the working life of prior art blood pump not long, and exist accident potential, thereby, have really its structure is improved and perfect necessity.
The purpose of this utility model is to improve the centrifugal blood flow pump structure of prior art, the blood pump rotor is designed to the accurate maglev type of permanent magnetism, only a bit be supported on the pump case bottom surface with the lower end, whole quilt freely is suspended among the pump housing fully, thereby the drawback of having avoided blood cell in service to be pulverized, the safety and the service life of the work of raising blood pump.
Heart aid system centrifugal blood pump in this utility model left side adopts permanent magnetic coupling to realize the permanent magnetism transmission of power, the master end of permanent magnetic coupling and slave end are separated and keep air gap by pump case, the master end is contained on the motor reel, slave end and blood pump rotor join together and are in the pump case, on the blood pump rotor blade is arranged, pump case is provided with the blood flow entrance and exit, it is characterized in that having in the pump housing a pair of coaxial line to install, the direction of magnetization is the permanent magnetism magnetic floating mechanism that the permanent-magnet of same axis direction constitutes, described this a pair of permanent-magnet is divided into decides magnet and moving magnet two parts, wherein decide magnet and pump case is fixed, moving magnet and blood pump rotor join together; The bottom centre of blood pump rotor be supported in inboard at the bottom of the pump case shell in the heart.
Fig. 1 is the centrifugal blood pump structural representation of this utility model.
Fig. 2 is a kind of centrifugal blood pump structural representation of prior art.
Fig. 3 is the floating structural representation of permanent magnetism magnetic in this utility model pump housing.
Fig. 4 is the supporting structure sketch map of this utility model blood pump rotor bottom.
Fig. 5 is this utility model blood pump permanent magnetic coupling structural representation.
In conjunction with Fig. 1 and extremely detailed description embodiment illustrated in fig. 5 of Fig. 3, will make summary of the invention of the present utility model and characteristics become more clear.
At first see also Fig. 1, the centrifugal blood pump of this utility model is carried out transmission by motor 101 by permanent magnetic coupling 120, permanent magnetic coupling 120 is made up of master end 121 and slave end 122, master end 121 is contained on the axle of motor 101, slave end 122 is contained in blood pump rotor 150 and is on the planar lower surface 153, the two joins together and places in the pump case 110, the master end 121 and the slave end 122 of permanent magnetic coupling are separated by pump case 110, the two parallel to each other and coaxial line installation, blood pump rotor 150 is single-revolution bodies, is fixed with blade 151 on the side of its hypomere.Pump case 110 is to be lageniform container substantially, and there is blood flow inlet 112 upper end, and lower side has blood stream outlet 114.
As shown in figures 1 and 3, this utility model blood pump has permanent magnetism magnetic floating mechanism 160, it comprises a pair of permanent-magnet, in the present embodiment, this a pair of permanent-magnet is the hollow cylinder that a pair of internal diameter is identical with outside dimension and coaxial line is installed, be superposed moving magnet 162 and be positioned at the bottom decide magnet 161, moving magnet 162 is fixed on the epimere 152 of blood pump rotor 150, decide on the inwall that magnet 161 is fixed on pump case 110 stage casings, the moving magnet 162 and the direction of magnetization of decide magnet 161 along the hollow cylinder body axis consistent make progress or unanimity downward, (being consistent making progress among Fig. 3).The two is in an axial gap apart.
The supporting structure 170 of present embodiment blood pump rotor bottom as shown in Figure 1 and Figure 4.Rotor 150 has a flat bottom 153, and between the center of 113 inboards at the bottom of the shell of the center of rotor bottom 153 and pump case 110, setting-in one stainless steel ball 171 is bearing on the stainless shot 171 blood pump rotor 150, and detailed construction as shown in Figure 4.Piece of stainless steel 155 is equipped with in the center of blood pump rotor bottom 153, there is taper groove 157 at the center of this piece of stainless steel 155,113 inboards at the bottom of the shell of blood pump pump case 110, there is politef piece 115 position corresponding to piece of stainless steel 155, also there is taper groove 117 at the center of described politef piece 115, a stainless steel ball 171 is inlaid between taper groove 157 and 117, makes blood pump rotor 150 by these stainless steel ball 171 supportings, can high speed rotating.
The permanent magnetic coupling 120 of this utility model embodiment is flat, sees also Fig. 1 and Fig. 5.The structure of master end 121 and slave end 122 is identical, they respectively have an irony disk 123, be furnished with the segmental permanent magnet block 124 of even number on the circular surface of irony disk 123, the direction of magnetization of these magnetic piece is perpendicular to the circular surface of irony disk 123, and to be south (S) utmost point be installed on the irony circular surface with (N) is extremely alternate in north.Master end 121 and slave end 122 113 face one another at the bottom of the pump case shell with face that magnetic piece 124 is housed, and keep air gap, and the parallel to each other and coaxial line of disk plane is installed, and realizes not having the magnetic drives of machinery contact.
Use this utility model blood pump of permanent magnetic coupling transmission and permanent magnetic suspension technology, rotor 150 have only and light " ", drive 121 rotations of permanent magnetic coupling master end by motor 101, rotate by magnetic field coupling slave end 122 thereupon, so rotor 150 and blade 151 also together rotate, in the inlet 112 suction pumps of blood by the pump case top, the outlet 114 by pump case one side is discharged to the downstream then.Because the blood flow in the pump case is isolated from the outside, guarantee that blood is not subjected to outside contamination.Adopt the outstanding advantage of this utility model blood pump of permanent magnetism magnetic suspension supporting device to be, owing to there are not frame for movements such as bearing and axle envelope in the pump case, greatly reduced the chance that blood cell is pulverized, thereby the safety in utilization of this utility model blood pump and service life are all improved a lot.
Claims (4)
1. centrifugal blood pump of left heart aid system, adopt permanent magnetic coupling to realize the permanent magnetism transmission of power, the master end of permanent magnetic coupling and slave end are separated and keep air gap by pump case, the master end is contained on the motor reel, and slave end and blood pump rotor join together and be in the pump case; On the blood pump rotor blade is arranged, pump case is provided with the blood flow entrance and exit, it is characterized in that having in the pump housing permanent magnetism magnetic floating mechanism of the permanent-magnet formation that a pair of coaxial line is installed, the direction of magnetization is the same axis direction, described this a pair of permanent-magnet is divided into decides magnet and moving magnet two parts, wherein decide magnet and pump case is fixed, moving magnet and blood pump rotor join together; The center of the bottom of blood pump rotor be supported in inboard at the bottom of the pump case shell in the heart.
2. according to the described centrifugal blood pump of claim 1, it is characterized in that a pair of permanent-magnet in the described permanent magnetism magnetic floating mechanism is a pair of internal diameter hollow cylinder identical with outside dimension, superposed moving magnet is fixed on the epimere of blood pump rotor, be positioned at deciding on the inwall that magnet is fixed on the pump case stage casing of bottom, the two is axially at a distance of a gap.
3. according to claim 1 or 2 described centrifugal blood pump, piece of stainless steel is equipped with in the center that it is characterized in that the blood pump rotor bottom, there is the taper groove at the center of this piece of stainless steel, there is the politef piece inboard corresponding to the position of piece of stainless steel at the bottom of the shell of blood pump pump case, also there is the taper groove at the center of this politef piece, a stainless steel ball is inlaid between the said two taper grooves, makes the blood pump rotor by this stainless steel ball supporting.
4. according to the described centrifugal blood pump of claim 1, it is characterized in that permanent magnetic coupling wherein is the flat-plate type permanent-magnetic shaft coupling, the structure of its master end and slave end is identical, they respectively have an irony disk, be furnished with the segmental permanent magnet block of even number on the circular surface of this irony disk, the direction of magnetization of these magnetic piece is perpendicular to the circular surface of irony disk, and is on the alternate circular surface that is installed in the irony disk in the South Pole and the arctic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00204599 CN2412579Y (en) | 2000-02-15 | 2000-02-15 | Centrifugal blood flow pump for left heart auxiliary system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00204599 CN2412579Y (en) | 2000-02-15 | 2000-02-15 | Centrifugal blood flow pump for left heart auxiliary system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2412579Y true CN2412579Y (en) | 2001-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00204599 Expired - Fee Related CN2412579Y (en) | 2000-02-15 | 2000-02-15 | Centrifugal blood flow pump for left heart auxiliary system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2412579Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856521A (en) * | 2010-04-28 | 2010-10-13 | 湖南人文科技学院 | Heart assisting blood pumping device |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| WO2021120724A1 (en) * | 2019-12-18 | 2021-06-24 | 山东大学 | Extracorporeal circulation blood pump and method |
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| 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 |
| CN116603163A (en) * | 2022-01-26 | 2023-08-18 | 心擎医疗（苏州）股份有限公司 | Device for assisting heart in the event of failure |
| US11964145B2 (en) | 2019-07-12 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
-
2000
- 2000-02-15 CN CN 00204599 patent/CN2412579Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856521A (en) * | 2010-04-28 | 2010-10-13 | 湖南人文科技学院 | Heart assisting blood pumping device |
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11717670B2 (en) | 2017-06-07 | 2023-08-08 | Shifamed Holdings, LLP | Intravascular fluid movement devices, systems, and methods of use |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| US11229784B2 (en) | 2018-02-01 | 2022-01-25 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| US11964145B2 (en) | 2019-07-12 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and 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 |
| WO2021120724A1 (en) * | 2019-12-18 | 2021-06-24 | 山东大学 | Extracorporeal circulation blood pump and method |
| CN116603163A (en) * | 2022-01-26 | 2023-08-18 | 心擎医疗（苏州）股份有限公司 | Device for assisting heart in the event of failure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |