CN205055004U - Adopt artifical blood pump of hydraulic suspension bearing - Google Patents
Adopt artifical blood pump of hydraulic suspension bearing Download PDFInfo
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- CN205055004U CN205055004U CN201520754947.1U CN201520754947U CN205055004U CN 205055004 U CN205055004 U CN 205055004U CN 201520754947 U CN201520754947 U CN 201520754947U CN 205055004 U CN205055004 U CN 205055004U
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- blood pump
- impeller
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Abstract
The utility model discloses an adopt artifical blood pump of hydraulic suspension bearing, center at the pump case is equipped with the center pin, be equipped with the impeller rotor along the center pin circumference, be fixed with impeller inducer on center pin upper portion, impeller inducer's the height that highly is less than the impeller rotor, the width of impeller inducer blade is less than the radius of center pin, open at the top of pump case has the pump intake, the lateral wall of pump case is opened and is pumped the mouth, the blade top and the bottom of impeller rotor form the wedge clearance with the pump case inner wall respectively, set up electric magnetic stator coil in the lower part of center pin, be equipped with permanent magnetic ring in the inboard of impeller rotor, the beneficial effect of the utility model: set up the different rotor blade of thickness through the blade with in the impeller rotor, and set up in turn, can guarantee the supporting to the impeller rotor effectively, can effectively reduce the torrent again, improve the work efficiency of blood pump, realize guaranteeing that blood in effective renewal the in the micron order clearance, can provide sufficient suspension supporting force.
Description
Technical field
This utility model relates to medical apparatus and instruments, particularly relates to a kind of artificial blood pump adopting Hydrodynamic suspension bearing.
Background technology
Artificial blood pump natural imitation heartthrob type blood pump from can provide the rotary blood pump of Continuous Flow to experienced by the innovation of three technology up till now, and technological innovation mainly launches around problems such as the volume size of artificial blood pump, bearing heating and blood compatibilities.
First generation artificial blood pump, based on Bionic Design, utilizes machinery or Electromagnetic Drive to produce the change of periodic volume, simulation heartthrob.Because the artificial blood pump ubiquity volume of this generation is large, the shortcoming such as complex structure, life-span be short, mostly only as external auxiliary use.Second filial generation artificial blood pump generally adopts the impeller of high-speed rotary (centrifugal or axial-flow type) to drive blood one-way flow, and the universals of this generation artificial blood pump have employed the contact bearing be immersed in blood.Although in this, artificial blood pump extended the time-to-live of patient in generation, but find in clinical practice, contact bearing can cause mechanical failure because of wearing and tearing on the one hand, can cause heating because of long-time Mechanical Contact thus bring out the blood compatibility such as haemolysis, thrombosis sex chromosome mosaicism on the other hand.Third generation artificial blood pump, most important feature adopts non-contact type bearing design, and rotor suspends rotation in artificial blood pump, contacts with other parts mechanical.According to the difference realizing principle that suspends, it can be divided three classes again: electromagnetic levitation type, hydraulic suspension type and magnetic hydraulic coupling type.
Electromagnetic levitation type artificial blood pump realizes suspending by magnetic force, theoretical according to Earnshaw, is only to realize stable passive type suspension by permanent magnet, is the stability of keeping system, at least will carries out ACTIVE CONTROL to a direction of motion.Therefore existing electromagnetic levitation type artificial blood pump all has a set of active control system, comprise: sensor, controller, electric magnet etc., this inevitably brings that volume is large, heating is large and the series of problems such as energy consumption is high, and US Patent No. 6716157B2 and US Patent No. 6264635B1 all adopts this kind of mode.
Magnetic liquid coupling suspension bearing scheme adopts magnetic force or the different suspension bearing mode of fluid power in axis with radial direction, utilizes the advantage of two kinds of suspended patterns to ensure the supporting of rotor.Two product HVAD and MVAD of HeartWare company all adopts magnetic liquid coupled modes to carry out suspension bearing.
Following problem is all existed for above-mentioned two kinds of bearing technologies:
1, adopt the magnetic suspension mode of ACTIVE CONTROL, control system is complicated, and volume is large, heating is large;
2, the magnetic suspension bearing energy consumption of ACTIVE CONTROL is high.
Hydraulic suspension type artificial blood pump, the dynamic pressure utilizing moving blood to produce on wedge structure realizes the driven suspension of impeller, as compared to magnetic suspension and the magnetic liquid active suspended pattern such as to suspend that is coupled, Hydrodynamic suspension need not provide extra energy and control for the realization suspended, structure greatly simplifies, there is the advantages such as power consumption is little, reliability is high, strong shock resistance, also have scholar to be referred to as forth generation artificial blood pump.The patent of application number CN201210422080 and CN200910096973 all adopts this Hydrodynamic suspension mode, and Hydrodynamic suspension supported clearance is mostly micron order gap, 2 points below the fluid flow blood demand fulfillment in this kind of micron order levitation gap:
1, ensure that blood effectively upgrades in micron order gap;
2, enough suspension bearing power can be provided simultaneously.
And these above two sections of patents can not reach this two requirements preferably simultaneously.
Utility model content
The purpose of this utility model is exactly to solve the problem, provide a kind of driven suspension, effectively ensure suspension bearing power while can ensure again good scouring effect, the artificial blood pump of the employing Hydrodynamic suspension bearing of strong shock resistance.
To achieve these goals, this utility model adopts following technical scheme:
A kind of artificial blood pump adopting Hydrodynamic suspension bearing, central shaft is provided with at the center of pump case, centrally axle circumference is provided with vane rotor, vane rotor does not contact with central shaft, portion is fixed with impeller inducer on center shaft, the height of impeller inducer is less than the height of vane rotor, the width of impeller inducer blade is less than the radius of central shaft, impeller inducer is the fixing diversion component having both suction chamber and pumping chamber dual function, impeller inducer can insert the liquid into the suction chamber of vane rotor, and cushioning effect can be played to incoming flow, drain is carried out to the Secondary Flow between central shaft and vane rotor simultaneously, be conducive to washing away and upgrading of Secondary Flow runner inner fluid, vane rotor is coordinated to change the mobility status of vane rotor entrance.Have pump intake at the top of pump case simultaneously, the sidewall of pump case has pump discharge, the vane tip of vane rotor and bottom form wedge gap with pump housing endophragm respectively, in the bottom of central shaft, Electromagnetic stator coils is set, permanent magnet ring is provided with in the inner side of vane rotor, rotated by Electromagnetic stator coils and permanent magnet ring effect impeller rotor, fluid forms radial Hydrodynamic suspension by wedge gap to vane rotor and carrys out block bearing, ensure that vane rotor is suspended in pump case contactless with pump housing endophragm.
Further, described vane rotor comprises the rotor blade that multiple thin and thick replaces, the rotor blade that thin and thick replaces decreases exclusion and the mantle friction of blade on the one hand, the length making again Ye Daoyou enough on the other hand, to ensure that the stability of liquid stream and blade are to the abundant effect of liquid, effectively reduce the whirlpool loss that fluid produces in pump case, thus the headloss that slippage is caused reduces, there is provided enough suspension bearing power, and thick rotor blade plays a suspension bearing effect.
Further, the middle bent of described rotor blade, arranges like this and decreases the work efficiency that turbulent flow improves blood pump.
Further, described rotor blade is linked together by the circular rib be arranged in the middle part of described pump case, realizes the connection to multiple blade, do not need by external force by circular rib.
Further, the middle spinal column of described impeller inducer and described central axis line, middle spinal column is evenly equipped with multiple guide vane, and the cross section of guide vane is fan-shaped.
Further, described wedge gap becomes large from inside to outside gradually along the radial direction of described pump case.
Further, described circular rib becomes large gradually along the radial direction thickness of described pump case, there is thinner circular rib import thickness, circular rib maximum gauge is away from import, thus have less inlet incidence angle, larger import area of passage, is more conducive to liquid and spreads to vane rotor outer ring along circular rib.
Further, the width of described guide vane broadens from the head of described impeller inducer gradually to bottom, incoming flow and impeller inducer contact area is radially increased gradually, increases the fluid flow angle entering vane rotor, not easily cause the blocking of whole runner.
Operation principle of the present utility model is: during work, Electromagnetic stator coils is energized, with permanent magnet ring effect, promotion vane rotor rotates, blood flows into from pump intake, vane rotor is in rotation process, one road blood pumps formation sprue by the rotation of vane rotor from pump discharge, pressure is gone out because pump discharge place pressure is greater than pump intake, another road blood (Secondary Flow before mentioned) is under the effect of inlet outlet pressure differential, by the inner surface of lower pump case and vane rotor large, the gap of vanelets side, lower pump case and vane rotor large, the gap of vanelets lower surface, the impeller clearance of impeller inducer and rotor inner hole form a closed loop, the blood flowed into pump intake converges, form the fluid liquid film secondary channels of axial and radial driven suspension supporting.
Compared with prior art, this utility model has the following advantages:
1) adopt the bearing arrangement of Hydrodynamic suspension, avoid the generation that bearing wear and frictional heating etc. bring out thrombosis factor, need complicated active control system, improve the impact resistance of blood pump.
2) pass through rotor blades different for the blade thickness setting in vane rotor, and be arranged alternately, effectively can ensure the supporting to vane rotor, effectively can reduce turbulent flow again, improve the work efficiency of blood pump.
3) by arranging impeller inducer, have both suction chamber and pumping chamber dual function, the suction chamber of vane rotor can be inserted the liquid into, and cushioning effect can be played to incoming flow, drain is carried out to the Secondary Flow between central shaft and vane rotor simultaneously, be conducive to washing away and upgrading of Secondary Flow runner inner fluid, coordinate vane rotor to change the mobility status of vane rotor entrance.
4) total greatly simplifies, and has that power consumption is little, reliability is high, the advantage of strong shock resistance.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present utility model.
Fig. 2 is integral outer structural representation of the present utility model.
Fig. 3 is rotor structure top view of the present utility model.
Fig. 4 is rotor rotor blade and circular rib structural representation.
Fig. 5 is figure impeller inducer structural representation.
Fig. 6 is lower pump case assembly drawing.
Fig. 7 is vane rotor suspension theory schematic diagram.
Fig. 8 is this utility model fluid motion principle figure.
In figure: 1, pump intake, 2, upper pump case, 3, vane rotor, 3A, big leaf's slice end face, 3B, big leaf's slice bottom surface, 3C, vanelets end face, 3D, vanelets bottom surface, 4, circular rib, 4A, circular rib upper surface, 4B, circular rib lower surface, 5, lower pump case, 6, impeller inducer, 6A, middle spinal column, 6B, guide vane, 6C, external screw thread, 7, Electromagnetic stator coils, 8, permanent magnet ring, 9, pump discharge.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Adopt an artificial blood pump for Hydrodynamic suspension bearing, comprise that center has the upper pump case 2 of pump intake 1, the lower pump case 5 coordinated with upper pump case 2, vane rotor 3, impeller inducer 6, drives Electromagnetic stator coils 7, permanent magnet ring 8; The vane rotor 3 of thin and thick alternate type blade is embedded between pump case 2 and lower pump case 5, vane rotor comprises the blade that 6 or 8 thin and thicks replace, multiple blade is connected by circular rib 4, wherein 3 or 4 for there being the big leaf's slice at inclination angle, all the other 3 or 4 for there being the vanelets at inclination angle, big leaf's slice, vanelets are alternately distributed successively; Have the upper and lower inclined plane of the large and small blade at inclination angle to form wedge gap with upper pump case 2, lower pump case 5 inwall respectively, the circular rib connecting each blade is thickening gradually to outer ring by inner ring.During work, blood flows into from pump intake 1, one road blood is flowed out from pump discharge 9 through the rotation of vane rotor 3 by impeller inducer 6, the inner surface of another road blood by lower pump case 5 and the gap of the large and small blade side of vane rotor 3, the gap of large and small blade lower surface of lower pump case 5 and vane rotor 3, the impeller clearance of impeller inducer 6 and rotor inner hole form a closed loop, and the blood flowed into pump intake 1 converges.Streaming flow in upper and lower wedge gap forms axial fluid power suspension bearing bearing, streaming flow in the side clearance of large and small blade side with upper pump case 2, lower pump case 5 inner surface forms radial Hydrodynamic suspension block bearing, ensures that vane rotor 3 is suspended in pump case contactless with the inwall of upper pump case 2 and lower pump case 5; Central shaft in the middle of lower pump case 5 is embedded with Electromagnetic stator coils 7, and be embedded with permanent magnet ring 8 inside vane rotor, Electromagnetic stator coils 7 is corresponding with permanent magnet ring 8; Upper pump case 2 and lower pump case 5 junction are pump discharge 9, and pump intake 1 communicates with upper pump case 2 top.
Be illustrated in figure 2 this utility model integral outer structural representation.Pump intake 1 and pump discharge 9 adopt circle, and upper pump case 2 and lower pump case 5 junction are pump discharge 9, and the composition surface between two parts component is plane, and connected mode adopts bolt and nut fastening.
As shown in Figure 3, rotor structure top view of the present utility model, the blade that vane rotor is replaced by 6 or 8 thin and thicks is is altogether connected and composed by circular rib 4, wherein 3 or 4 for there being the big leaf's slice of inclination angle (middle bent), Main Function is suspension bearing, all the other 3 or 4 for there being the vanelets at inclination angle, Main Function is reduce turbulent flow and improve the efficiency of pump, big leaf's slice, vanelets are alternately distributed successively, and big leaf's slice thickness is 4 ~ 5 times of vanelets thickness.
As shown in Figure 4, rotor blade of the present utility model and circular rib structural representation.3 or 4 large and small blades of vane rotor 3, the thickness of every sheet upper surface radially from inside to outside on direction diminishes all gradually, and the angle α between big leaf's slice end face 3A and horizontal line, the angle γ between vanelets end face 3C and horizontal line are 0.2 ° ~ 0.5 °; The thickness of the every sheet lower surface of large and small blade radially from inside to outside on direction diminishes all gradually, and the angle β between big leaf's slice bottom surface 3B and horizontal line, the angle δ between vanelets bottom surface 3D and horizontal line are 0.2 ° ~ 0.5 °; Described circular rib 4 structure, becomes large gradually along inner ring to the thickness on the direction of outer ring, and the upper surface 4A of circular rib 4 and lower surface 4B is symmetrical about the median plane of circular rib 4, and and angle theta between centrosymmetry face be 0.5 ° ~ 0.8 °.
As shown in Figure 5, described impeller inducer structural representation of the present utility model.The middle spinal column 6A of impeller inducer 6 is cylinder, guide vane 6B is embedded on middle spinal column 6A by 3 or 4, the cross section of guide vane is fan-shaped, fan shape center angle φ is 20 ° ~ 25 °, external screw thread 6C and the cylinder in the middle of lower pump case 5 are for being threaded, screw thread is single head equal pitch thread, and equal pitch thread is offered from the small end face of bottom is equidistant upwards clockwise.
As shown in Figure 6, described lower pump case assembly drawing of the present utility model.Motionless electromagnetic stator coil 7 and permanent magnet 8 on central shaft, impeller inducer 6 is arranged on central shaft top, is fixed on by central shaft in lower pump case 5, central shaft and lower pump case 5 are integrally, composition surface between central shaft and impeller inducer 6 is plane, and connected mode adopts screw to connect.
As shown in Figure 7, described vane rotor suspension theory schematic diagram of the present utility model, this schematic diagram show 1/4 vane rotor 3 axial suspension and radial suspension stressed, the axial suspension supporting force that vane rotor is subject to comprises upper and lower two parts: axial suspension power suffered on the upper surface 3A of vane rotor 3 big leaf's slice is F
x, direction is downward, because wedge gap radially becomes large from inside to outside gradually, and F
xdiminish gradually; Axial suspension power suffered on the lower surface 3B of vane rotor 3 big leaf's slice is F
y, upwards, because of wedge gap, radially also change is large gradually from inside to outside, F in direction
yradially diminish gradually from inside to outside, at suspension bearing power F
xand F
ycombined effect under vane rotor 3 be in the axial direction in dynamic equilibrium.The radial suspension supporting force that vane rotor 3 is subject to comprises the power that rotor outer ring and rotor inner ring two parts are subject to: the radial suspension supporting force size that its rotor outer ring is subject to is F
1, direction perpendicular to rotor outer surface, suspension bearing power F
1fluid liquid film is formed by the inner surface of lower pump case 5 and the gap of the large and small blade side of vane rotor; The radial suspension supporting force size that rotor inner ring is subject to is F
2, direction perpendicular to rotor inner surface, suspension bearing power F
2by the fluid liquid film forming between the cylinder in the middle of rotor inner hole and lower pump case 5, at suspension bearing power F
1and F
2combined effect under vane rotor 3 be in dynamic equilibrium diametrically, thus whole vane rotor 3 at the suspension bearing effect low suspension of axial and radial liquid film in pump case.
As shown in Figure 8, the fluid motion principle figure of described this utility model blood pump.During work, blood flows into from pump intake 1, vane rotor 3 is in rotation process, one road blood pumps formation sprue by the rotation of vane rotor 3 from pump discharge 9, another road blood is under the effect of inlet outlet pressure differential, by the inner surface of lower pump case 5 and vane rotor 3 large, the gap of vanelets side, lower pump case 5 is large with vane rotor 3, the gap of vanelets lower surface, the impeller clearance of impeller inducer 6 and vane rotor endoporus form a closed loop, the blood flowed into pump intake 1 converges, form the fluid liquid film secondary channels of axial and radial driven suspension supporting.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the restriction not to this utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (8)
1. one kind adopts the artificial blood pump of Hydrodynamic suspension bearing, it is characterized in that, central shaft is provided with at the center of pump case, centrally axle circumference is provided with vane rotor, portion is fixed with impeller inducer on center shaft, the height of impeller inducer is less than the height of vane rotor, the width of impeller inducer blade is less than the radius of central shaft, the top of pump case has pump intake, the sidewall of pump case has pump discharge, the vane tip of vane rotor and bottom form wedge gap with pump housing endophragm respectively, in the bottom of central shaft, Electromagnetic stator coils is set, permanent magnet ring is provided with in the inner side of vane rotor.
2. artificial blood pump as claimed in claim 1, it is characterized in that, described vane rotor comprises the rotor blade that multiple thin and thick replaces.
3. artificial blood pump as claimed in claim 2, is characterized in that, the middle bent of described rotor blade.
4. artificial blood pump as claimed in claim 2 or claim 3, it is characterized in that, described rotor blade is linked together by the circular rib be arranged in the middle part of described pump case.
5. artificial blood pump as claimed in claim 1, it is characterized in that, the middle spinal column of described impeller inducer and described central axis line, middle spinal column is evenly equipped with multiple guide vane, and the cross section of guide vane is fan-shaped.
6. artificial blood pump as claimed in claim 1, is characterized in that, described wedge gap becomes large from inside to outside gradually along the radial direction of described pump case.
7. artificial blood pump as claimed in claim 4, it is characterized in that, described circular rib becomes large gradually along the radial direction thickness of described pump case.
8. artificial blood pump as claimed in claim 5, it is characterized in that, the width of described guide vane broadens from the head of described impeller inducer gradually to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754947.1U CN205055004U (en) | 2015-09-25 | 2015-09-25 | Adopt artifical blood pump of hydraulic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520754947.1U CN205055004U (en) | 2015-09-25 | 2015-09-25 | Adopt artifical blood pump of hydraulic suspension bearing |
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| Publication Number | Publication Date |
|---|---|
| CN205055004U true CN205055004U (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520754947.1U Expired - Fee Related CN205055004U (en) | 2015-09-25 | 2015-09-25 | Adopt artifical blood pump of hydraulic suspension bearing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105343950A (en) * | 2015-09-25 | 2016-02-24 | 济南大学 | Artificial blood pump adopting hydraulic suspension bearing |
| CN107519549A (en) * | 2017-09-30 | 2017-12-29 | 清华大学天津高端装备研究院 | A kind of new Single Degree of Freedom Magnetic suspension centrifugal impeller |
| CN114099940A (en) * | 2021-11-25 | 2022-03-01 | 山东大学 | Mixed-flow blood pump and extracorporeal circulation auxiliary system |
-
2015
- 2015-09-25 CN CN201520754947.1U patent/CN205055004U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105343950A (en) * | 2015-09-25 | 2016-02-24 | 济南大学 | Artificial blood pump adopting hydraulic suspension bearing |
| CN107519549A (en) * | 2017-09-30 | 2017-12-29 | 清华大学天津高端装备研究院 | A kind of new Single Degree of Freedom Magnetic suspension centrifugal impeller |
| CN114099940A (en) * | 2021-11-25 | 2022-03-01 | 山东大学 | Mixed-flow blood pump and extracorporeal circulation auxiliary system |
| CN114099940B (en) * | 2021-11-25 | 2023-05-02 | 山东大学 | Mixed-flow blood pump and extracorporeal circulation auxiliary system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20190925 |