CN104373358A - Impeller and rolling bearing magnetic drive centrifugal pump based on Archimedes spiral - Google Patents
Impeller and rolling bearing magnetic drive centrifugal pump based on Archimedes spiral Download PDFInfo
- Publication number
- CN104373358A CN104373358A CN201410641042.3A CN201410641042A CN104373358A CN 104373358 A CN104373358 A CN 104373358A CN 201410641042 A CN201410641042 A CN 201410641042A CN 104373358 A CN104373358 A CN 104373358A
- Authority
- CN
- China
- Prior art keywords
- rolling bearing
- impeller
- magnet ring
- centrifugal pump
- archimedes
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/049—Roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2216—Shape, geometry
Abstract
The invention discloses an impeller and rolling bearing magnetic drive centrifugal pump based on the Archimedes spiral. The magnetic drive centrifugal pump comprises a motor, a driving magnetic ring and a driven magnetic ring, wherein the driving magnetic ring is connected with a motor rotor, the driven magnetic ring and the driving magnetic ring are arranged in a non-contact mode, and the driven magnetic ring transmits torque through magnetic force. An air gap between the driving magnetic ring and the driven magnetic ring is provided with a separation sealing sleeve. The driven magnetic ring and an impeller rotor are fixed together, the impeller rotor is supported and limited by a rolling bearing, the impeller rotor is connected with the outer ring of the rolling bearing, the inner ring of the rolling bearing is locked on a supporting shaft, the supporting shaft is connected and fixed with a pump shell base, and the curved surface curve of the impeller rotor is the Archimedes spiral. By the adoption of the technical scheme, a magnetic coupler is used for transmitting torque, and a motor shaft is in non-mechanical contact with a centrifugal rotor; accordingly, blood leakage and contamination are avoided; in addition, the surface shape of the impeller is the Archimedes spiral, so damage to blood components can be reduced.
Description
Technical field
The invention belongs to medical ultraprecise pump field, drive centrifugal pump in particular to a kind of magnetic based on spiral of Archimedes impeller and rolling bearing.
Background technique
The application of medical centrifugal pump mainly contains in experience of cardiopulmonary bypass, making assisted circulation of ventriculus cordis, heart transplant operation, external membrane lung support, operation on aorta, liver, renal transplantation applies extracorporal circulatory system etc.In conventional centrifugal pump, because rotor shaft sealing place exists friction, time centrifugal pump runs up, larger heat can be produced, thus easily cause thrombus, and the hypostasis of rotor shaft sealing place is motionless, also easily causes thrombus.In impeller centrifugal pump, the profile design of impeller is very crucial, and the quality of impeller curve determines that centrifugal pump is to the destructiveness of blood.
In the present invention, carry out transmitting torque by magnetic shaft coupling, and impeller surface shape is spiral of Archimedes, it can reduce the destruction to blood component, and arranges back shaft and rolling bearing and come to support vane rotor and spacing, solves the problems referred to above.
Summary of the invention
The object of the invention is to overcome prior art Problems existing, the centrifugal pump of employing is magnetic force driven centrifugal pump, and the transmission between centrifugal pump rotor and motor shaft is realized by magnetic shaft coupling.The maximum feature of magnetic shaft coupling is the isolating seal cover by being arranged in principal and subordinate's magnet rotor intermediate air gap, driven magnet rotor and transmission part can be sealed completely, and when there is no Mechanical Contact, by magnetic force by the motion of driving link and transmission of power to Passive part.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of magnetic based on spiral of Archimedes impeller and rolling bearing drives centrifugal pump, comprise motor, the active magnet ring be connected with rotor, and to arrange with the non-contact of active magnet ring and to pass through the driven magnet ring of magnetic drives moment of torsion, isolating seal cover is provided with in described active magnet ring and driven magnet ring intermediate air gap, described driven magnet ring and vane rotor are fixed together, described vane rotor is by roller bearings and spacing, vane rotor connects with housing washer, described rolling bearing inner ring is locked on a back shaft, back shaft and pump case base are connected and fixed, the impeller Curve On The Surface of described vane rotor is spiral of Archimedes.
Further, described driven magnet ring and initiatively staggeredly respectively on magnet ring be inlaid with polylith permanent magnet.
Further, described vane rotor and driven magnet ring are integral type structure.
Further, above described pump case base, be sealed with pump case upper cover, and between by O type circle sealing.
Further, the material of described pump case base and pump case upper cover adopts the polycarbonate (PC) with better biocompatibility.
Further, one end of described vane rotor and pump case base, the unsettled setting in the chamber that pump case base and pump case upper cover are formed of vane rotor remaining part.
The invention has the beneficial effects as follows:
Centrifugal pump does not produce mechanical presses to blood, so destroy lighter to blood formed element.Centrifugal pump is applicable to large discharge transmission, and flow is generally at 0-10L/min.The pressure that centrifugal pump provides is at 0-600mmHg.Centrifugal pump Security is high.There is a small amount of bubble in blood-transmitted, be concentrated in center portion and be not transmitted away.It is little that centrifugal pump has volume, lightweight, rubs little, simple operation and other advantages.Magneto drive is realized from the transmission between centrifugal pump rotor and motor shaft by magnetic shaft coupling.Motor shaft and centrifugal pump rotor do not have Mechanical Contact.Avoid blood leakage and contaminated, solve the problem of centrifugal pump input shaft difficult sealing, pump head can disposablely be changed, and replacement operation is easy, reduces costs, and impeller surface shape is spiral of Archimedes, and it can reduce the destruction to blood component.
Accompanying drawing explanation
Fig. 1 is internal sectional structure schematic diagram of the present invention;
Fig. 2 is rolling bearing structure partial enlarged drawing in Fig. 1;
Fig. 3 is the spiral of Archimedes impeller schematic diagram that the present invention adopts.
Number in the figure illustrates: 1, locking nut, 2, bearing, 3, connection shaft seat, 4, initiatively magnet ring, 5, fitting seat, 6, pump case base, 7, driven magnet ring, 8, O type circle, 9, pump case upper cover, 10, screw, 11, vane rotor, 12, screw, 13, nut, 14, rolling bearing, 15, back shaft, 16, passive wing base, 17, passive side cover.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
As shown in Figure 1, driven by motor initiatively magnet ring 4 rotates, and initiatively rotation is passed to driven magnet ring 7 by magnetic force by magnet ring.Driven magnet ring 7 and vane rotor 11 are integrated, thus realize motor driven impeller rotor 11 and rotate.Vane rotor 11, driven magnet ring 7, pump case upper cover 9 and base 6 adopt the materials polycarbonate with better biocompatibility, and 10 pieces of permanent magnets interlock and are embedded in driven magnet ring 7 and active magnet ring 4.Owing to adopting magneto drive, thus make between motor and vane rotor 11 without the need to Mechanical Contact just energy transmitting torque.Avoid the problem that vane rotor 11 shaft sealing brings, simplify the structure of pump case base 6.
As shown in Figure 1, vane rotor 11(and centrifugal pump rotor) only have one end and body contact, whole vane rotor 11 remaining part is all unsettled under static or motion state.Suppose that vane rotor 11 radial direction occurs and moves down, then below magnetic bearing, radial distance reduces, then the close increase of the magnetic in air gap, the resistivity of magnetic bearing bottom magnet ring is increased, vane rotor 11 is back into center.The motion also similar this situation in vane rotor 11 radially other directions.Therefore, vane rotor 11 radial direction is stable.Because active magnet ring 4 and driven magnet ring 7 attract each other, vane rotor 11 will be attracted by active magnet ring 4, be pressed on pump case base 6, also be axially therefore stable.
As shown in Figure 2, vane rotor 11 supports with spacing by rolling bearing 14, and rolling bearing 14 inner ring is locked on back shaft 15, and is connected and fixed with pump case base 6; Rolling bearing 14 outer ring connects with vane rotor 11 and driven magnet ring 7, rotates simultaneously.
Be the impeller based on spiral of Archimedes design of the present invention as shown in Figure 3, its curve and surface shape can reduce the destruction to blood cost.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. one kind is driven centrifugal pump based on the magnetic of spiral of Archimedes impeller and rolling bearing, it is characterized in that, comprise motor, the active magnet ring (4) be connected with rotor, and to arrange with active magnet ring (4) non-contact and to pass through the driven magnet ring (7) of magnetic drives moment of torsion, isolating seal cover is provided with in described active magnet ring (4) and driven magnet ring (7) intermediate air gap, described driven magnet ring (7) and vane rotor (11) are fixed together, described vane rotor (11) by rolling bearing (14) support and spacing, vane rotor (11) connects with rolling bearing (14) outer ring, described rolling bearing (14) inner ring is locked on a back shaft (15), back shaft (15) and pump case base (6) are connected and fixed, the impeller Curve On The Surface of described vane rotor (11) is spiral of Archimedes.
2. the magnetic based on spiral of Archimedes impeller and rolling bearing according to claim 1 drives centrifugal pump, it is characterized in that, described driven magnet ring (7) and initiatively magnet ring (4) interlock respectively is inlaid with polylith permanent magnet.
3. the magnetic based on spiral of Archimedes impeller and rolling bearing according to claim 1 drives centrifugal pump, it is characterized in that, described vane rotor (11) and driven magnet ring (7) are integral type structure.
4. the magnetic based on spiral of Archimedes impeller and rolling bearing according to claim 1 drives centrifugal pump, it is characterized in that, described pump case base (6) top is sealed with pump case upper cover (9), and between by O type circle (8) sealing.
5. the magnetic based on spiral of Archimedes impeller and rolling bearing according to claim 3 drives centrifugal pump, it is characterized in that, the material of described pump case base (6) and pump case upper cover (9) adopts the polycarbonate (PC) with better biocompatibility.
6. the magnetic based on spiral of Archimedes impeller and rolling bearing according to claim 1 or 4 drives centrifugal pump, it is characterized in that, one end of described vane rotor (11) and pump case base (6), the unsettled setting in the chamber that pump case base (6) and pump case upper cover (9) are formed of vane rotor (11) remaining part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641042.3A CN104373358A (en) | 2014-11-14 | 2014-11-14 | Impeller and rolling bearing magnetic drive centrifugal pump based on Archimedes spiral |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641042.3A CN104373358A (en) | 2014-11-14 | 2014-11-14 | Impeller and rolling bearing magnetic drive centrifugal pump based on Archimedes spiral |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104373358A true CN104373358A (en) | 2015-02-25 |
Family
ID=52552463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410641042.3A Pending CN104373358A (en) | 2014-11-14 | 2014-11-14 | Impeller and rolling bearing magnetic drive centrifugal pump based on Archimedes spiral |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104373358A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115300754A (en) * | 2022-07-19 | 2022-11-08 | 上海神玑医疗科技有限公司 | Power transmission device and blood vessel intervention operation robot |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606698A (en) * | 1984-07-09 | 1986-08-19 | Mici Limited Partnership Iv | Centrifugal blood pump with tapered shaft seal |
| CN2077050U (en) * | 1990-05-03 | 1991-05-15 | 丁嘉定 | Ring fully-sealing electric centrifugal pump |
| US6439845B1 (en) * | 2000-03-23 | 2002-08-27 | Kidney Replacement Services, P.C. | Blood pump |
| CN2582571Y (en) * | 2002-11-01 | 2003-10-29 | 韩化兴 | Medical therapeutic apparatus for obstructive sleeping respiration suspension symptomgroup |
| US20040236420A1 (en) * | 2001-07-12 | 2004-11-25 | Takashi Yamane | Artificial heart pump equipped with hydrodynamic bearing |
| JP4059316B2 (en) * | 2002-06-06 | 2008-03-12 | 三菱重工業株式会社 | Blood pump |
| CN204419600U (en) * | 2014-11-14 | 2015-06-24 | 中国科学院苏州生物医学工程技术研究所 | A kind of magnetic based on spiral of Archimedes impeller and rolling bearing drives centrifugal pump |
-
2014
- 2014-11-14 CN CN201410641042.3A patent/CN104373358A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606698A (en) * | 1984-07-09 | 1986-08-19 | Mici Limited Partnership Iv | Centrifugal blood pump with tapered shaft seal |
| CN2077050U (en) * | 1990-05-03 | 1991-05-15 | 丁嘉定 | Ring fully-sealing electric centrifugal pump |
| US6439845B1 (en) * | 2000-03-23 | 2002-08-27 | Kidney Replacement Services, P.C. | Blood pump |
| US20040236420A1 (en) * | 2001-07-12 | 2004-11-25 | Takashi Yamane | Artificial heart pump equipped with hydrodynamic bearing |
| JP4059316B2 (en) * | 2002-06-06 | 2008-03-12 | 三菱重工業株式会社 | Blood pump |
| CN2582571Y (en) * | 2002-11-01 | 2003-10-29 | 韩化兴 | Medical therapeutic apparatus for obstructive sleeping respiration suspension symptomgroup |
| CN204419600U (en) * | 2014-11-14 | 2015-06-24 | 中国科学院苏州生物医学工程技术研究所 | A kind of magnetic based on spiral of Archimedes impeller and rolling bearing drives centrifugal pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115300754A (en) * | 2022-07-19 | 2022-11-08 | 上海神玑医疗科技有限公司 | Power transmission device and blood vessel intervention operation robot |
| CN115300754B (en) * | 2022-07-19 | 2023-11-28 | 上海神玑医疗科技有限公司 | Power transmission device and vascular intervention surgical robot |
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| C06 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150225 |
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