CN204628289U - Be applied to the single-ended axial separation formula magnetic suspension bearing of centrifugal artificial heart pump - Google Patents
Be applied to the single-ended axial separation formula magnetic suspension bearing of centrifugal artificial heart pump Download PDFInfo
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- CN204628289U CN204628289U CN201520357856.4U CN201520357856U CN204628289U CN 204628289 U CN204628289 U CN 204628289U CN 201520357856 U CN201520357856 U CN 201520357856U CN 204628289 U CN204628289 U CN 204628289U
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Abstract
The utility model discloses a kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump, comprise fixed base, suspension, magnet, permanent magnet and electromagnetic coil, wherein, the upper end of fixed base projection is provided with radial permanent magnet bearing internal magnet, protruding lower end is provided with lower radial permanent magnet bearing internal magnet, fixed base internal edge is provided with electromagnetic coil, and the bottom of fixed base boss is provided with step, is provided with axial permanent magnetic bearing lower magnet in step; Inner side and the fixed base matching form of suspension close, and upper end is provided with the upper radial permanent magnet bearing external magnet corresponding with upper radial permanent magnet bearing internal magnet, middle part is provided with the lower radial permanent magnet bearing external magnet corresponding with lower radial permanent magnet bearing internal magnet, neutral position, bottom is provided with magnet on the axial permanent magnetic bearing corresponding with axial permanent magnetic bearing lower magnet, bottom edge position is provided with permanent magnet, by controlling the size of current of electromagnetic coil, realize between suspension and fixed base, having gap to suspend and gap length.
Description
Technical field
The utility model relates to a kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump.
Background technique
Artificial heart pump develops into the third generation, and outstanding feature is the application of rotor shaft suspension technique, and its advantage is not friction, not wearing and tearing, reduces the infringement to blood.The third generation artificial heart pump substituting mechanical bearing with magnetic suspension bearing is studied by multiple country of the world and applies in the developed country such as the U.S., Germany.
More there is the problem that volume is large, weight is large in existing artificial heart pump, bother very much at implanted, increases the difficulty of operation, adds the misery of patient.
Reducing the volume of artificial heart pump, weight and reducing power consumption is the target that people make great efforts always.In order to reduce the volume and weight of artificial heart pump, being beneficial to implant into body spy and proposing the utility model.
Model utility content
The utility model is in order to solve the problem, propose a kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump, this device adopts separate type, rely on single-ended magnetic bearing generation suction itself and repulsion to reach the stable suspersion of rotor axial, solution never needs other power axial, saving space and can realize the problem of axial stable suspersion.
To achieve these goals, the utility model adopts following technological scheme:
A kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump, comprise fixed base, suspension, magnet, permanent magnet and electromagnetic coil, wherein, fixed base is convex shape, the upper end of fixed base projection is provided with radial permanent magnet bearing internal magnet, and protruding lower end is provided with lower radial permanent magnet bearing internal magnet, and fixed base internal edge is provided with electromagnetic coil, the bottom of fixed base boss is provided with step, is provided with axial permanent magnetic bearing lower magnet in step;
Inner side and the fixed base matching form of suspension close, and upper end is provided with the upper radial permanent magnet bearing external magnet corresponding with upper radial permanent magnet bearing internal magnet, middle part is provided with the lower radial permanent magnet bearing external magnet corresponding with lower radial permanent magnet bearing internal magnet, neutral position, bottom is provided with magnet on the axial permanent magnetic bearing corresponding with axial permanent magnetic bearing lower magnet, bottom edge position is provided with permanent magnet, by controlling the size of current of electromagnetic coil, realize the adjustment of the gap length suspended between suspension and fixed base.
On described axial permanent magnetic bearing, magnet and axial permanent magnetic bearing lower magnet are a pair annular permanent magnet.
On described axial permanent magnetic bearing, magnet is consistent with the magnetizing direction of axial permanent magnetic bearing lower magnet, and during placement, between two magnetic poles, magnetic force is equal, magnetic contrary, produces repulsion.
Described permanent magnet is fixed on bottom suspension, produces suction after electromagnetic coil is energized and between permanent magnet, regulates size of current in electromagnetic coil, namely regulates suction size, controls the distance that suspension leaves fixed base.
Described fixed base is provided with sensor, detects the levitation gap between suspension and fixed base.
Working principle of the present utility model:
In order to realize suspension axial suspension, suspension need be allowed to be suspended on the equinoctial point of setting, no matter the power that suspension is subject on the axial both sides of balance point position is gravity, fluid force or other impact of interference power etc. that change, axially can be decomposed into the contrary power of both direction.As long as so vertical repulsive force design is enough suitable, when suspension changes position under external force, when namely leaving equinoctial point, the corresponding change of electromagnetic force, ensures that two power equal and opposite in direction directions are contrary, make impeller suspended at equinoctial point all the time.
The beneficial effects of the utility model are:
(1) magnetic suspension bearing of single-ended axial separation formula structure of the present utility model, when suspension is different or be subject to fluid force or other power can both keep stable suspersion at different azimuth gravity;
(2) axial magnetic bearing is divided into two-part, Permanent-magnet bearing and electromagnetic bearing, and two bearings are all positioned at bottom whole suspension structure, additionally do not take up room;
(3) problem that volume is large, weight is large, power consumption is large, temperature rise is large that existing magnetic suspension manual heart pump exists is solved.
Accompanying drawing explanation
Fig. 1 is single-ended axial separation formula magnetic bearing schematic diagram of the present utility model;
Fig. 2 is the magnetizing direction schematic diagram of magnet on magnet and axial permanent magnetic bearing on axial permanent magnetic bearing of the present utility model;
Fig. 3 is axial permanent magnetic bearing appearance schematic diagram of the present utility model.
Wherein, 1, suspension; 2, upper radial permanent magnet bearing external magnet; 3, upper radial permanent magnet bearing internal magnet; 4, magnetic in lower radial permanent magnet bearing; 5, lower radial permanent magnet bearing external magnet; 6, magnet on axial permanent magnetic bearing; 7, axial permanent magnetic bearing lower magnet; 8, fixed base; 9, sensor; 10, electromagnetic coil; 11, annular permanent magnet.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
For single-ended axial magnetic bearing, generally need to use gravity, fluid force or other power and combine to realize single-ended stability contorting with single-ended control force.The single-ended axial magnetic bearing of the utility model innovative design, adopt separate type, rely on single-ended magnetic bearing generation suction itself and repulsion to reach the stable suspersion of rotor axial, solution never needs other power axial, saving space and can realize the problem of axial stable suspersion.The magnetic suspension mode of the single-ended control that the utility model proposes, in order to realize two-way magnetic force, devising separated type suction and repulsion and the structure of depositing, seeing the cod in Fig. 1, take full advantage of the space of centrifugal artificial heart pump impeller.
Be illustrated in figure 1 full suspension system, radial stable suspersion is realized by radial magnetic bearing, and implementation process of the present utility model is only introduced and realize axial stable suspersion under the prerequisite of radial stable suspersion.Realize gap between suspension 1 and fixed base 8 to suspend, the utility model is ingenious utilizes the structure that the base diameter of centrifugal artificial heart pump is large, single-ended magnetic suspension bearing is designed to separate type, realize the magnetic bearing of repulsion, to see in Fig. 1 magnet 6 and axial permanent magnetic bearing lower magnet 7 on axial Permanent-magnet bearing, in the inside near axle; Realize the magnetic bearing of suction, see electromagnetic coil 10 and annular permanent magnet 11 in Fig. 1, from the distant outside of axle.This single-ended axial magnetic bearing separate type, the repulsion of cod and suction two mechanical axis are held the lower end being all arranged in blood pump rotor, single-ended generation suction and repulsion, and rely on the controllability of the suction magnetic bearing of electromagnetic coil 10 and annular permanent magnet 11 in Fig. 1 to realize bidirectional force balance, to reach the stable suspersion of rotor axial.After adopting this structure, can obviously reduce suspension structure volume, save space.Realize the magnetic bearing magnetizing direction of repulsion as shown in Figure 2, on axial permanent magnetic bearing, magnet 6 and axial permanent magnetic bearing lower magnet 7 are a pair round ring magnets, axial charging, and two annulus magnetizing directions are consistent, during placement, between two magnetic poles, magnetic force is equal, magnetic contrary, produces repulsion.Profile is shown in Fig. 3.
Coil 10 is fixed on fixed base 8, is making toroidal coil.Annular permanent magnet 11 is round ring magnet or other permeability magnetic materials, is fixed on bottom suspension 1.When after energising, between circular coil 10 and annular permanent magnet 11, produce suction, according to the distance size of current in regulating winding at any time that sensor detects, namely regulate suction size, control the distance that suspension 1 leaves fixed base 8.
The magnetic suspension bearing of single-ended axial separation formula structure of the present utility model, when rotor is different or be subject to fluid force or other power can both keep stable suspersion at different azimuth gravity.
In order to realize suspension axial suspension, suspension 1 need be allowed to be suspended on the equinoctial point of setting, no matter the power that suspension is subject on the axial both sides of balance point position is gravity, fluid force or other impact of interference power etc. that change, axially can be decomposed into the contrary power of both direction.As long as so vertical repulsive force design is enough suitable, when impeller changes position under external force, when namely leaving equinoctial point, the corresponding change of electromagnetic force, ensures that two power equal and opposite in direction directions are contrary, make impeller suspended at equinoctial point all the time.The gap suspended is detected by range sensor 9, and rotor reaches axial stable suspersion.
Axial magnetic bearing is divided into two-part, Permanent-magnet bearing (on axial permanent magnetic bearing magnet 6 and axial permanent magnetic bearing lower magnet 7 two-part) and electromagnetic bearing (electromagnetic coil 10 and annular permanent magnet 11 two-part).Two bearings are all positioned at bottom whole suspension structure, additionally do not take up room.Solve the problem that volume is large, weight is large, power consumption is large, temperature rise is large that existing magnetic suspension manual heart pump exists.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the 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 (5)
1. one kind is applied to the single-ended axial separation formula magnetic suspension bearing of centrifugal artificial heart pump, it is characterized in that: comprise fixed base, suspension, magnet, permanent magnet and electromagnetic coil, wherein, fixed base is convex shape, the upper end of fixed base projection is provided with radial permanent magnet bearing internal magnet, and protruding lower end is provided with lower radial permanent magnet bearing internal magnet, and fixed base internal edge is provided with electromagnetic coil, the bottom of fixed base boss is provided with step, is provided with axial permanent magnetic bearing lower magnet in step;
Inner side and the fixed base matching form of suspension close, and upper end is provided with the upper radial permanent magnet bearing external magnet corresponding with upper radial permanent magnet bearing internal magnet, middle part is provided with the lower radial permanent magnet bearing external magnet corresponding with lower radial permanent magnet bearing internal magnet, neutral position, bottom is provided with magnet on the axial permanent magnetic bearing corresponding with axial permanent magnetic bearing lower magnet, bottom edge position is provided with permanent magnet, by controlling the size of current of electromagnetic coil, realize the adjustment of the gap length suspended between suspension and fixed base.
2. a kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump as claimed in claim 1, is characterized in that: on described axial permanent magnetic bearing, magnet and axial permanent magnetic bearing lower magnet are a pair annular permanent magnet.
3. a kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump as claimed in claim 1, it is characterized in that: on described axial permanent magnetic bearing, magnet is consistent with the magnetizing direction of axial permanent magnetic bearing lower magnet, during placement, between two magnetic poles, magnetic force is equal, magnetic contrary, produces repulsion.
4. a kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump as claimed in claim 1, it is characterized in that: described permanent magnet is fixed on bottom suspension, suction is produced after electromagnetic coil is energized and between permanent magnet, regulate size of current in electromagnetic coil, namely regulate suction size, control the distance that suspension leaves fixed base.
5. a kind of single-ended axial separation formula magnetic suspension bearing being applied to centrifugal artificial heart pump as claimed in claim 1, is characterized in that: described fixed base is provided with sensor, detects the levitation gap between suspension and fixed base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357856.4U CN204628289U (en) | 2015-05-28 | 2015-05-28 | Be applied to the single-ended axial separation formula magnetic suspension bearing of centrifugal artificial heart pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520357856.4U CN204628289U (en) | 2015-05-28 | 2015-05-28 | Be applied to the single-ended axial separation formula magnetic suspension bearing of centrifugal artificial heart pump |
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| Publication Number | Publication Date |
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| CN204628289U true CN204628289U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520357856.4U Expired - Fee Related CN204628289U (en) | 2015-05-28 | 2015-05-28 | Be applied to the single-ended axial separation formula magnetic suspension bearing of centrifugal artificial heart pump |
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| CN (1) | CN204628289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895922A (en) * | 2015-05-28 | 2015-09-09 | 山东大学 | Single-ended axial separation type magnetic suspension bearing applied to centrifugal artificial heart pump |
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2015
- 2015-05-28 CN CN201520357856.4U patent/CN204628289U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895922A (en) * | 2015-05-28 | 2015-09-09 | 山东大学 | Single-ended axial separation type magnetic suspension bearing applied to centrifugal artificial heart pump |
| CN104895922B (en) * | 2015-05-28 | 2017-03-22 | 山东大学 | Single-ended axial separation type magnetic suspension bearing applied to centrifugal artificial heart pump |
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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 |
Granted publication date: 20150909 Termination date: 20160528 |