CN112807565A - Magnetic suspension blood pump - Google Patents
Magnetic suspension blood pump Download PDFInfo
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- CN112807565A CN112807565A CN201911050309.0A CN201911050309A CN112807565A CN 112807565 A CN112807565 A CN 112807565A CN 201911050309 A CN201911050309 A CN 201911050309A CN 112807565 A CN112807565 A CN 112807565A
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- circuit board
- impeller
- yoke plate
- control circuit
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- 239000008280 blood Substances 0.000 title claims abstract description 57
- 210000004369 blood Anatomy 0.000 title claims abstract description 57
- 239000000725 suspension Substances 0.000 title claims abstract description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims description 96
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000005339 levitation Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention discloses a magnetic suspension blood pump, which comprises an impeller, a motor and a control circuit board, wherein the impeller is arranged on the motor; the motor comprises a rotor and a stator, the rotor is fixedly arranged on the impeller, the stator is arranged outside the impeller and comprises an iron core and stator coils wound on the iron core, the stator coils are arranged outside the impeller, and the stator coils are arranged around the rotor for a circle so that the stator can drive the rotor to suspend and rotate; the control circuit board is electrically connected with the plurality of stator coils, and the control circuit board can control the current of the stator coils. Through the arrangement, when the stator coil flows in current, the stator can simultaneously drive the impeller to suspend and rotate, so that the centralized control of rotation and suspension is realized, the product compactness is improved, and the problem that the rotation and suspension functions of the existing magnetic suspension blood pump are separately controlled is practically solved.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a magnetic suspension blood pump.
Background
Generally, magnetic suspension blood pump can set up motor coil and suspension coil, and motor coil is used for controlling the rotation of impeller alone, and suspension coil is used for controlling the suspension of impeller alone, is equivalent to having set up two sets of control system, and this has led to the magnetic suspension blood pump compact structure nature relatively poor, is difficult to realize the design of integrating, has brought the hindrance for magnetic suspension blood pump's development.
Disclosure of Invention
Therefore, a magnetic suspension blood pump with a compact structure is needed.
An impeller;
the motor comprises a rotor and a stator, the rotor is fixedly installed on the impeller, the stator comprises an iron core and stator coils wound on the iron core, the stator is arranged outside the impeller, and the stator coils are arranged around the rotor for one circle so that the stator can drive the rotor to suspend and rotate;
and the control circuit board is electrically connected with the plurality of stator coils and can control the current of the stator coils.
In one embodiment, the impeller comprises an impeller body and a pipe column arranged on the impeller body, the impeller body is provided with a liquid flow channel, the pipe column is communicated with the liquid flow channel, the rotor is arranged in the pipe wall of the pipe column, the stator is arranged outside the pipe column, and the stator coils are arranged around the circumference of the pipe column.
In one embodiment, the iron core further comprises a stator yoke plate and a plurality of stator teeth, wherein the stator yoke plate is provided with a mounting hole, the mounting hole penetrates through two opposite surfaces of the stator yoke, and the plurality of stator teeth are arranged on the stator yoke plate and arranged along the edge of the mounting hole; the stator coils are wound on the stator teeth, and the pipe column penetrates through the mounting hole.
In one embodiment, the magnetic suspension blood pump further comprises a monitoring component for detecting position information of the impeller, the monitoring component is electrically connected with the control circuit board, the monitoring component can transmit the detected position information of the impeller to the control circuit board, and the control circuit board can control the current of the stator coil according to the position information; the pipe column penetrates through the monitoring assembly, and the stator yoke plate is located between the monitoring assembly and the control circuit board.
In one embodiment, a plurality of first upright posts are arranged between the stator yoke plate and the monitoring assembly, and the first upright posts are fixedly connected with the stator yoke plate and the monitoring assembly;
and/or a plurality of second stand columns are arranged between the stator yoke plate and the control circuit board, and the second stand columns are fixedly connected with the stator yoke plate and the control circuit board.
In one embodiment, the magnetic suspension blood pump further comprises a connecting plate, the connecting plate is disposed between the monitoring assembly and the stator yoke plate, a plurality of first vertical posts are disposed between the connecting plate and the stator yoke plate, the first vertical posts are fixedly connected with the connecting plate and the stator yoke plate, a plurality of second vertical posts are disposed between the stator yoke plate and the control circuit board, the second vertical posts are fixedly connected with the stator yoke plate and the control circuit board, a plurality of third vertical posts are disposed between the monitoring assembly and the connecting plate, and the third vertical posts are fixedly connected with the monitoring assembly and the connecting plate; the tubular column penetrates through the control circuit board and the connecting plate.
In one embodiment, a plurality of stator teeth are arranged on the side wall of the mounting hole, and the extending direction of each stator tooth is perpendicular to the extending direction of the pipe column; or, a plurality of stator teeth are all arranged on the surface of the stator yoke plate, each stator tooth comprises a strip-shaped part and a bent part formed at one end of the strip-shaped part, one end, far away from the bent part, of the strip-shaped part is fixedly connected with the stator yoke plate, and the extending direction of the bent part is perpendicular to the extending direction of the tubular column.
In one embodiment, the magnetic suspension blood pump further comprises a monitoring component for detecting the position information of the impeller, the monitoring component comprises a monitoring circuit board, a positioning ring and a plurality of position sensors, the monitoring circuit board is electrically connected with the control circuit board, the positioning ring is arranged on the monitoring circuit board, the position sensors are all arranged on the positioning ring, the pipe column penetrates through the monitoring circuit board and the positioning ring, and the position sensors are arranged around the pipe column.
In one embodiment, the positioning ring has a plurality of grooves formed on an inner wall thereof, the position sensors are respectively encapsulated in the grooves, and the pins of the position sensors extend from an outer wall of the positioning ring and are electrically connected to the monitoring circuit board.
In one embodiment, the impeller body is located at one end of the pipe column, and a sealing cover is arranged at one end of the pipe column far away from the impeller body and covers the opening of the end of the pipe column far away from the impeller body and the rotor.
The invention has the following beneficial effects:
because rotor fixed mounting is on the impeller, the stator sets up the outside at the impeller, and a plurality of stator coils encircle the rotor and set up a week, so set up the mode, when making to stator coil circular telegram, the stator can drive the suspension of rotor, and rotatory simultaneously, thereby it is rotatory to drive the impeller suspension, the rotation that has realized the impeller promptly and the suspension by stator centralized control, need not to set up motor coil and suspension coil simultaneously, the product compactness has been improved, solve traditional magnetic suspension blood pump conscientiously and must rotate and the problem of suspension function separate control.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a magnetic levitation blood pump according to an embodiment;
FIG. 2 is a first cross-sectional view of the magnetically levitated blood pump of FIG. 1;
FIG. 3 is a second cross-sectional view of the magnetically levitated blood pump of FIG. 1;
FIG. 4 is a cross-sectional view of an impeller of an embodiment of a magnetically levitated blood pump;
FIG. 5 is a schematic structural diagram of a first stator and a monitoring assembly of the magnetic levitation blood pump in an embodiment;
FIG. 6 is an exploded view of FIG. 5;
FIG. 7 is a schematic structural view of the retaining ring of FIG. 6;
FIG. 8 is a cross-sectional view of FIG. 7;
FIG. 9 is a schematic structural diagram of a second stator of a magnetic levitation blood pump integrated with a monitoring assembly according to an embodiment;
FIG. 10 is an exploded view of FIG. 9;
fig. 11 is a schematic structural view of the core of fig. 10;
FIG. 12 is a force diagram of an impeller of an embodiment of a magnetically levitated blood pump;
FIG. 13 is a force diagram of the impeller of FIG. 12 moving downward;
fig. 14 is a force diagram of the impeller of fig. 12 when it is tilted.
The reference numbers are as follows:
11. a blood inlet; 12. a blood outlet; 13. a cable;
20. an impeller; 21. an impeller body; 21a, a liquid flow channel; 22. a pipe string; 221. sealing the cover;
31. a rotor; 32. an iron core; 321. a stator yoke plate; 321a, mounting holes; 322. stator teeth; 322a, a bar; 322b, a bending part; 33. a stator coil; 34. a control circuit board; 35. a stator;
40. a monitoring component; 41. monitoring the circuit board; 42. a position sensor; 43. a positioning ring; 431. a groove;
51. a first upright post; 52. a second upright post; 53. a third column;
60. a connecting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As can be seen from fig. 1, the magnetic suspension blood pump of an embodiment is provided with a blood inlet 11, a blood outlet 12 and a cable 13, and the direction shown in the figure is taken as a reference, at this time, the blood inlet 11 is arranged at the upper part of the magnetic suspension blood pump, the blood inlet 11 is used for supplying blood to the inside of the magnetic suspension blood pump, the blood outlet 12 and the cable 13 are both arranged near the lower part of the magnetic suspension blood pump, the blood outlet 12 is used for supplying blood to the outside, and the cable 13 is used for connecting with a power supply, so as to implement the operation of.
As shown in fig. 2-6, the magnetically levitated blood pump includes an impeller 20, a motor and a control circuit board 34.
The impeller 20 is capable of being suspended and rotated. The impeller 20 includes an impeller body 21 and a pipe column 22 provided on the impeller body 21. The impeller body 21 is provided with a liquid flow passage 21a, and the column 22 is communicated with the liquid flow passage 21 a.
The motor includes a rotor 31 and a stator. The rotor 31 is fixedly mounted on the impeller 20. Wherein the rotor 31 is arranged within the tube wall of the tubing string 22. Specifically, the rotor 31 is substantially annular, and the rotor 31 is housed within the tubular wall of the stem 22. The stator is disposed outside the impeller 20. The stator includes a core 32 and a stator coil 33 wound on the core 32, and the plurality of stator coils 33 are disposed around the rotor 31 so that the stator can drive the rotor 31 to float and rotate. Specifically, a plurality of stator coils 33 are provided outside the pipe string 22, and are arranged around the circumference of the pipe string 22. The plurality of stator coils 33 are arranged in a common circle, and the central axis of the rotor 31 passes through the center of the circle and is perpendicular to the plane of the circle.
The control circuit board 34 is used to control the operation of the motor. The control circuit board 34 is electrically connected to the plurality of stator coils 33, and the control circuit board 34 can control the magnitude of the current of the stator coils 33.
When the magnetic suspension blood pump is in operation, current flows into the stator coil 33, so that the stator generates a magnetic field, thereby causing the rotor 31 to suspend and rotate, and the rotor 31 is fixedly mounted on the impeller 20, so that the impeller 20 is suspended and rotated.
In order to monitor and regulate the rotation condition of the impeller 20 in real time, further, the magnetic suspension blood pump further comprises a monitoring component 40 for detecting the position information of the impeller 20, the monitoring component 40 is electrically connected with the control circuit board 34, the monitoring component 40 can transmit the detected position information of the impeller 20 to the control circuit board 34, and the control circuit board 34 can control the current of the stator coil 33 according to the position information, so as to realize the position control of the rotor 31. Specifically, the monitoring assembly 40 includes a monitoring circuit board 41 and a plurality of position sensors 42, the monitoring circuit board 41 is electrically connected to the control circuit board 34, the stem 22 passes through the monitoring circuit board 41, the plurality of position sensors 42 are electrically connected to the monitoring circuit board 41, the plurality of position sensors 42 are disposed around the stem 22, and the plurality of position sensors 42 are used for monitoring the position of the impeller 20. That is, after the position sensor 42 monitors the position of the impeller 20 in real time, the control circuit board 34 can change the input current of the stator in time, so as to regulate and control the suspension rotation state of the impeller 20. In the embodiment shown in fig. 2, the monitoring circuit board 41 and the control circuit board 34 are respectively disposed on two opposite sides of the impeller body 21; in the embodiment shown in fig. 3, the monitoring circuit board 41 and the control circuit board 34 can be disposed on the same side of the impeller body 21, so as to achieve normal operation of the magnetic suspension blood pump. It should be noted that the position of the monitoring circuit board 41 is not limited to the position shown in fig. 2 and fig. 3, and may be other positions as long as the normal operation of the magnetic suspension blood pump can be achieved.
Wherein, the monitoring component 40 detects the position of the impeller 20, and the realization principle that the control circuit board 34 adjusts the position of the impeller 20 is as follows:
as can be seen from fig. 12, when the rotor 31 is disposed in the space enclosed by the stator 35, the rotor 31 will be subjected to radial magnetic forces FR1 and FR2, and by controlling the magnetic force FR1 to FR2, the force applied to the rotor 31 can be ensured to be parallel, thereby achieving smooth suspension of the impeller.
As can be seen from fig. 13, when the rotor 31 is disposed in the space defined by the stator 35, if the rotor 31 is displaced in the vertical direction, the rotor 31 will be subjected to the magnetic force F1 'and the magnetic force F2', and the magnetic force F1 'includes the radial component force FR 1' and the vertical component force FZ1 ', and the magnetic force F2' includes the radial component force FR2 'and the vertical component force FZ 2', wherein the radial component force FR1 'and the radial component force FR 2' are in the radial direction and gradually tend to be balanced, and the vertical component force FZ1 'and the vertical component force FZ 2' will move the impeller in the opposite direction to the movement of the impeller, so as to return the impeller to the balanced position; the position sensor can detect the position of the impeller in real time, and further control the magnetic force F1 'and the magnetic force F2' by controlling the current of the stator.
As can be seen from fig. 14, when the rotor 31 is disposed in the space defined by the stator 35, if the rotor 31 is in the inclined state, opposite sides of the rotor 31 are respectively subjected to a magnetic force F1 "and a magnetic force F2", and the magnetic force F1 "includes a radial component force FR 1" and a vertical component force FZ1 ", and the magnetic force F2" includes a radial component force FR2 "and a vertical component force FZ 2", wherein the radial component force FR1 "and the radial component force FR 2" are in the radial direction and gradually tend to be balanced, and the vertical component force FZ1 "and the vertical component force FZ 2" make the impeller move in the opposite direction to the movement of the impeller, so that the impeller returns to the balanced position; the position sensor can detect the position of the impeller in real time, and further control the magnetic force F1 'and the magnetic force F2' by controlling the current of the stator.
It should be pointed out that the installation accuracy of the position sensor 42 has extremely high requirements, but at present, the position sensor 42 is directly installed on the monitoring circuit board 41, and installation errors are extremely easy to occur in the assembly process, so that great difficulty is brought to the accurate control of the magnetic suspension blood pump; to solve this problem, as shown in fig. 3, 6 and 7, the monitoring assembly 40 may further include a positioning ring 43, the positioning ring 43 is disposed on the monitoring circuit board 41, the plurality of position sensors 42 are disposed on the positioning ring 43, and the pipe string 22 is disposed through the monitoring circuit board 41 and the positioning ring 43.
That is, the position sensor 42 is firstly disposed on the positioning ring 43, and then the positioning ring 43 is assembled on the monitoring circuit board 41, which has the advantages that the positioning ring 43 can be customized according to the requirement, the positioning ring 43 meeting the requirement is manufactured, and then the plurality of position sensors 42 are mounted on the positioning ring 43, which is much simpler than that the plurality of position sensors 42 are directly and accurately aligned and connected with the monitoring circuit board 41; therefore, after the precision machining, the position sensor 42 can be accurately installed on the positioning ring 43, so that the installation precision of the position sensor 42 is ensured, and the dilemma of the prior art is practically solved.
It should be noted that, in order to facilitate the installation and fixation of the position sensor 42 on the positioning ring 43, as shown in fig. 6 to 8, a plurality of grooves 431 are formed on the inner wall of the positioning ring 43, the plurality of position sensors 42 are respectively encapsulated in the plurality of grooves 431, and the pins of the position sensor 42 extend from the outer wall of the positioning ring 43 and are electrically connected to the monitoring circuit board 41.
Since the groove 431 can be formed on the positioning ring 43 by precision machining, the positional deviation of the groove 431 is extremely small, and the mounting accuracy of the position sensor 42 can be ensured by simply mounting the position sensor 42 in the groove 431; and because the pin of the position sensor 42 can be directly led out through the outer wall of the positioning ring 43, the position sensor 42 and the monitoring circuit board 41 are conveniently electrically connected, and convenience is provided for assembling the position sensor 42.
It should be noted that, in order to realize the matching installation between the impeller 20 and the stator, a preferred arrangement is as shown in fig. 5 to fig. 6, the iron core 32 includes a stator yoke plate 321 and a plurality of stator teeth 322, a mounting hole 321a is opened on the stator yoke plate 321, the mounting hole 321a penetrates through two opposite surfaces of the stator yoke plate 321, the plurality of stator teeth 322 are all disposed on the stator yoke plate 321, and the plurality of stator teeth 322 are disposed along an edge of the mounting hole 321 a. Specifically, the iron core 32 is an integrally formed structure, so that the installation operation of the stator yoke plate 321 and the stator teeth 322 is not required, and the assembly efficiency is greatly improved. Wherein the plurality of stator coils 33 are wound around the plurality of stator teeth 322, respectively. The stem 22 passes through the mounting hole 321a, and the arrangement enables the stator teeth 322 to be simply arranged to surround the rotor 31, while also utilizing the circumferential side space of the stem 22 to arrange the stator teeth 322.
Further, the stem 22 is inserted into the monitoring assembly 40, and the stator yoke plate 321 is located between the monitoring assembly 40 and the control circuit board 34, so that the space utilization rate of the peripheral side of the stem 22 can be further increased. Specifically, the stem 22 is inserted through the monitoring circuit board 41. By arranging the pipe column 22 through the mounting holes 321a of the monitoring circuit board 41 and the stator yoke plate 321, the mounting compactness of the pipe column 22, the monitoring circuit board 41 and the stator yoke plate 321 can be improved, and the distance between the position sensor 42 on the monitoring circuit board 41 and the pipe column 22 is ensured to be close, so that the monitoring accuracy of the position sensor 42 is improved.
Further, the control circuit board 34 is still worn to locate by the tubular column 22, that is, the tubular column 22 wears to locate by the monitoring circuit board 41, the stator yoke plate 321 and the control circuit board 34, so set up, the structures such as the monitoring circuit board 41, the control circuit board 34, the stator yoke plate 321 and the stator are all located on the peripheral side of the tubular column 22, and the space is not additionally occupied, thereby greatly improving the structural compactness of the magnetic suspension blood pump.
The stator yoke plate 321 is disposed between the monitoring circuit board 41 and the control circuit board 34, but limits the arrangement orientation of the monitoring circuit board 41 and the control circuit board 34; for example, the monitoring circuit board 41 may be disposed on a side of the stator yoke plate 321 close to the impeller 20, the control circuit board 34 may be disposed on a side of the stator yoke plate 321 far from the impeller 20, or the monitoring circuit board 41 may be disposed on a side of the stator yoke plate 321 far from the impeller 20, and the control circuit board 34 may be disposed on a side of the stator yoke plate 321 close to the impeller 20.
It should be noted that, in order to further improve the structural compactness of the magnetic suspension blood pump, the monitoring circuit board 41, the control circuit board 34 and the stator yoke board 321 may be integrated, and connecting members are respectively disposed between the stator yoke board 321 and the monitoring assembly 40 and between the stator yoke board 321 and the control circuit board 34, some of the connecting members are fixedly connected with the stator yoke board 321 and the monitoring circuit board 41, and the other connecting members are fixedly connected with the stator yoke board 321 and the control circuit board 34. As shown in fig. 5 and 6, a plurality of first vertical columns 51 are disposed between the stator yoke plate 321 and the monitoring circuit board 41, and two ends of the plurality of first vertical columns 51 are respectively fixedly connected to the stator yoke plate 321 and the monitoring circuit board 41; a plurality of second upright posts 52 are arranged between the stator yoke plate 321 and the control circuit board 34, and two ends of the plurality of second upright posts 52 are respectively fixedly connected with the control circuit board 34 and the stator yoke plate 321. Wherein the first upright 51 and the second upright 52 are one form of the above-mentioned connecting member.
Namely, the stator yoke plate 321 and the monitoring circuit board 41 are connected and fixed through the first upright post 51, the stator yoke plate 321 and the control circuit board 34 are fixed through the second upright post 52, and the stator yoke plate 321, the monitoring circuit board 41 and the control circuit board 34 are connected into a whole, so that the structure compactness of the magnetic suspension blood pump is improved, and convenience is provided for assembling the magnetic suspension blood pump.
Among them, in order to improve the connection stability between the stator yoke plate 321, the monitoring circuit board 41 and the control circuit board 34, it is preferable to provide the first and second columns 51 and 52 in a circumferential arrangement; for example, the plurality of first posts 51 are arranged along the circumferential direction of the monitoring circuit board 41, thereby ensuring firm connection everywhere between the stator yoke plate 321 and the monitoring circuit board 41; similarly, the second posts 52 are arranged along the circumferential direction of the control circuit board 34, so as to ensure the firm connection between the stator yoke plate 321 and the control circuit board 34.
It should be noted that the form of the connecting member is not limited to the form of the first upright 51 and the second upright 52, and in other embodiments, the connecting member is rod-shaped, the middle portion of the connecting member is fixed to the stator yoke plate 321, and the two ends of the connecting member are fixed to the control circuit board 34 and the monitoring circuit board 41, respectively. Alternatively, the connecting member is not limited to a columnar form, but may be a bar, a sheet, or the like.
As shown in fig. 3 and 6, in one embodiment, a plurality of stator teeth 322 are disposed on the sidewall of the mounting hole 321a, and the extending direction of the stator teeth 322 is perpendicular to the extending direction of the pipe string 22. Since the sidewall of the mounting hole 321a is opposite to the sidewall of the stem 22, when the stator teeth 322 are disposed on the sidewall of the mounting hole 321a, the stator teeth 322 will be opposite to the sidewall of the stem 22, and the extending direction of the stator teeth 322 is perpendicular to the extending direction of the stem 22, so that the magnetic force generated by the stator can be better transmitted to the rotor 31 in the stem 22.
Of course, for better control, a plurality of stator teeth 322 are evenly arranged around the tubular string 22.
Note that, the stator may be arranged in the manner shown in fig. 3 and 9 to 11 in addition to the above-described manner, and a plurality of stator teeth 322 are provided on the surface of the stator yoke plate 321. Specifically, the plurality of stator teeth 322 are located on the same surface of the stator yoke plate 321. The stator teeth 322 include a bar-shaped portion 322a and a bent portion 322b formed at one end of the bar-shaped portion 322a, one end of the bar-shaped portion 322a away from the bent portion 322b is fixedly connected to the stator yoke plate 321, and an extending direction of the bent portion 322b is perpendicular to an extending direction of the stem 22. At this time, the stator teeth 322 are substantially inverted L-shaped, one end of the bar-shaped portion 322a is fixedly connected to the stator yoke plate 321, the other end of the bar-shaped portion 322a is fixedly connected to the bent portion 322b, and the bent portion 322b and the stator yoke plate 321 are in a parallel and opposite state, so as to ensure that the magnetic force generated by the stator can be better transmitted to the rotor 31 in the column 22. In the embodiment shown in fig. 3, and 9 to 11, the stator teeth 322 are provided on the surface of the stator yoke plate 321 facing the impeller body 21. Of course, the stator teeth 322 are not limited to be disposed on the surface of the stator yoke plate 321 facing the impeller body 21, and the stator teeth 322 may also be disposed on the surface of the stator yoke plate 321 facing away from the impeller body 21, that is, the stator teeth 322 may be disposed on the surface of the stator yoke plate 321 facing or facing away from the impeller body 21, and may be selected according to the product design requirement.
It should be noted that, if the stator teeth 322 are disposed on the surface of the stator yoke plate 321, in order to enhance the detection accuracy of the position sensor 42, the monitoring circuit board 41 is preferably disposed near the surface of the stator yoke plate 321 where the iron core 32 is disposed, but since the stator teeth 322 have a certain height, which will increase the distance between the stator yoke plate 321 and the monitoring circuit board 41, in order to achieve the connection and fixation of the stator yoke plate 321 and the monitoring circuit board 41, the solutions shown in fig. 3, 9 and 10 can be adopted, at this time, the magnetic suspension blood pump further includes a connecting plate 60, the connecting plate 60 is disposed between the monitoring assembly 40 and the stator yoke plate 321, a plurality of first vertical columns 51 are disposed between the connecting plate 60 and the stator yoke plate 321, the plurality of first vertical columns 51 fixedly connect the connecting plate 60 and the stator yoke plate 321, a plurality of second vertical columns 52 are disposed between the stator yoke plate 321 and the control circuit board 34, the plurality of second vertical columns 52 fixedly connect, a plurality of third upright columns 53 are arranged between the monitoring component 40 and the connecting plate 60, and the monitoring component 40 and the connecting plate 60 are fixedly connected by the plurality of third upright columns 53; the stem 22 is disposed through the control circuit board 34 and the connecting plate 60, i.e., the stem 22 is disposed through the control circuit board 34, the stator yoke plate 321, the connecting plate 60 and the monitoring assembly 40.
Set up connecting plate 60 promptly and be the transfer structure, connecting plate 60 one surface is connected fixedly through first stand 51 and stator yoke board 321, and another surface of connecting plate 60 is connected fixedly through third stand 53 and monitoring subassembly 40, for example the connecting plate 60 can be connected fixedly through third stand 53 and monitoring circuit board 41, and stand length overlength can be avoided to this mode of setting up, prevents the cracked phenomenon of stand bending, thereby has ensured the joint strength between stator yoke board 321, connecting plate 60 and the monitoring subassembly 40 three.
Of course, in order to improve the connection stability between the stator yoke plate 321, the connection plate 60 and the monitoring assembly 40, it may be preferable to provide the first and third columns 51 and 53 in a circumferential arrangement; for example, the first upright posts 51 are plural, and the plural first upright posts 51 are arranged along the circumferential direction of the connecting plate 60, so as to ensure the connection between the stator yoke plate 321 and the connecting plate 60, and similarly, the third upright posts 53 may be provided plural, and the plural third upright posts 53 are arranged along the circumferential direction of the monitoring assembly 40, so as to ensure the connection between the connecting plate 60 and the monitoring assembly 40.
It should be noted that the rotor 31 is disposed in the pipe wall of the pipe column 22, so that the arrangement shown in fig. 3 and 4 can be adopted to facilitate the assembly of the rotor 31, where the impeller body 21 is located at one end of the pipe column 22, the end of the pipe column 22 far from the impeller body 21 is provided with a sealing cover 221, and the sealing cover 221 covers the opening of the end of the pipe column 22 far from the impeller body 21 and the rotor 31; that is, during assembly, the rotor 31 may be placed in the stem 22, and then the opening of the stem 22 may be covered with the cap 221, which may protect the rotor 31 even when the rotor 31 is mounted.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A magnetically levitated blood pump, comprising:
an impeller;
the motor comprises a rotor and a stator, the rotor is fixedly installed on the impeller, the stator is arranged outside the impeller, the stator comprises an iron core and stator coils wound on the iron core, and the stator coils are arranged around the rotor in a circle so that the stator can drive the rotor to suspend and rotate;
and the control circuit board is electrically connected with the plurality of stator coils and can control the current of the stator coils.
2. The magnetic suspension blood pump of claim 1, wherein the impeller comprises an impeller body and a tubular column arranged on the impeller body, the impeller body is provided with a liquid flow channel, the tubular column is communicated with the liquid flow channel, the rotor is arranged in the tubular wall of the tubular column, the stator is arranged outside the tubular column, and the stator coils are arranged around the circumference of the tubular column.
3. The magnetically levitated blood pump of claim 2, wherein the iron core further comprises a stator yoke plate and a plurality of stator teeth, the stator yoke plate is provided with a mounting hole, the mounting hole penetrates through two opposite surfaces of the stator yoke, and the plurality of stator teeth are arranged on the stator yoke plate and arranged along the edge of the mounting hole; the stator coils are wound on the stator teeth, and the pipe column penetrates through the mounting hole.
4. The magnetically levitated blood pump of claim 3,
the magnetic suspension blood pump also comprises a monitoring component for detecting the position information of the impeller, the monitoring component is electrically connected with the control circuit board, the monitoring component can transmit the detected position information of the impeller to the control circuit board, and the control circuit board can control the current of the stator coil according to the position information;
the pipe column penetrates through the monitoring assembly, and the stator yoke plate is located between the monitoring assembly and the control circuit board.
5. The magnetically levitated blood pump of claim 4,
a plurality of first stand columns are arranged between the stator yoke plate and the monitoring assembly, and are fixedly connected with the stator yoke plate and the monitoring assembly;
and/or a plurality of second stand columns are arranged between the stator yoke plate and the control circuit board, and the second stand columns are fixedly connected with the stator yoke plate and the control circuit board.
6. The magnetically levitated blood pump of claim 4,
the magnetic suspension blood pump further comprises a connecting plate, the connecting plate is arranged between the monitoring assembly and the stator yoke plate, a plurality of first stand columns are arranged between the connecting plate and the stator yoke plate, the first stand columns are fixedly connected with the connecting plate and the stator yoke plate, a plurality of second stand columns are arranged between the stator yoke plate and the control circuit board, the second stand columns are fixedly connected with the stator yoke plate and the control circuit board, a plurality of third stand columns are arranged between the monitoring assembly and the connecting plate, and the third stand columns are fixedly connected with the monitoring assembly and the connecting plate;
the tubular column penetrates through the control circuit board and the connecting plate.
7. The magnetically suspended blood pump according to claim 3, wherein a plurality of the stator teeth are disposed on the side wall of the mounting hole, and each of the stator teeth extends in a direction perpendicular to the extending direction of the pipe column;
or, a plurality of stator teeth are all arranged on the surface of the stator yoke plate, each stator tooth comprises a strip-shaped part and a bent part formed at one end of the strip-shaped part, one end, far away from the bent part, of the strip-shaped part is fixedly connected with the stator yoke plate, and the extending direction of the bent part is perpendicular to the extending direction of the tubular column.
8. The magnetic suspension blood pump of claim 2, further comprising a monitoring assembly for detecting the position information of the impeller, wherein the monitoring assembly comprises a monitoring circuit board, a positioning ring and a plurality of position sensors, the monitoring circuit board is electrically connected to the control circuit board, the positioning ring is disposed on the monitoring circuit board, the plurality of position sensors are disposed on the positioning ring, the pipe column penetrates through the monitoring circuit board and the positioning ring, and the plurality of position sensors are disposed around the pipe column.
9. The magnetic suspension blood pump of claim 8, wherein the inner wall of the positioning ring has a plurality of grooves, the position sensors are respectively encapsulated in the grooves, and the pins of the position sensors extend from the outer wall of the positioning ring and are electrically connected to the monitoring circuit board.
10. The magnetically levitated blood pump of claim 2, wherein the impeller body is located at one end of the pipe string, and an end of the pipe string remote from the impeller body is provided with a sealing cover which covers the rotor and an opening at the end of the pipe string remote from the impeller body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911050309.0A CN112807565A (en) | 2019-10-30 | 2019-10-30 | Magnetic suspension blood pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911050309.0A CN112807565A (en) | 2019-10-30 | 2019-10-30 | Magnetic suspension blood pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112807565A true CN112807565A (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911050309.0A Pending CN112807565A (en) | 2019-10-30 | 2019-10-30 | Magnetic suspension blood pump |
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| CN (1) | CN112807565A (en) |
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|---|---|---|---|---|
| US20050135942A1 (en) * | 2003-09-25 | 2005-06-23 | Medforte Research Foundation | Streamlined unobstructed one-pass axial-flow pump |
| CN101041091A (en) * | 2007-04-25 | 2007-09-26 | 上海大学 | Magnetic suspension manual heart pump |
| CN101732769A (en) * | 2010-01-26 | 2010-06-16 | 浙江大学 | Implantable blood pump adopting driven suspension bearing |
| CN204910253U (en) * | 2015-03-24 | 2015-12-30 | 山东科技大学 | Centrifugal magnetic suspension leaf wheel transmission |
| CN205698666U (en) * | 2016-03-14 | 2016-11-23 | 正仁（北京）医疗仪器有限公司 | External non-built-in mode magnetic suspension ventricle auxiliary centrifugal blood pump |
| US20170021071A1 (en) * | 2015-07-20 | 2017-01-26 | Thoratec Corporation | Flow estimation using hall-effect sensors |
| US20190209752A1 (en) * | 2018-01-10 | 2019-07-11 | Tc1 Llc | Bearingless implantable blood pump |
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2019
- 2019-10-30 CN CN201911050309.0A patent/CN112807565A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050135942A1 (en) * | 2003-09-25 | 2005-06-23 | Medforte Research Foundation | Streamlined unobstructed one-pass axial-flow pump |
| CN101041091A (en) * | 2007-04-25 | 2007-09-26 | 上海大学 | Magnetic suspension manual heart pump |
| CN101732769A (en) * | 2010-01-26 | 2010-06-16 | 浙江大学 | Implantable blood pump adopting driven suspension bearing |
| CN204910253U (en) * | 2015-03-24 | 2015-12-30 | 山东科技大学 | Centrifugal magnetic suspension leaf wheel transmission |
| US20170021071A1 (en) * | 2015-07-20 | 2017-01-26 | Thoratec Corporation | Flow estimation using hall-effect sensors |
| CN205698666U (en) * | 2016-03-14 | 2016-11-23 | 正仁（北京）医疗仪器有限公司 | External non-built-in mode magnetic suspension ventricle auxiliary centrifugal blood pump |
| US20190209752A1 (en) * | 2018-01-10 | 2019-07-11 | Tc1 Llc | Bearingless implantable blood pump |
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