CN205792106U - A kind of blood pump dual redundant motor - Google Patents
A kind of blood pump dual redundant motor Download PDFInfo
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- CN205792106U CN205792106U CN201620441162.3U CN201620441162U CN205792106U CN 205792106 U CN205792106 U CN 205792106U CN 201620441162 U CN201620441162 U CN 201620441162U CN 205792106 U CN205792106 U CN 205792106U
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- blood pump
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- redundant motor
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Abstract
The utility model discloses a kind of blood pump dual redundant motor, belong to machine field, blood pump dual redundant motor includes pump case, it is positioned at the end cap of described pump case both sides, it is fixed on the stator of described cover internal, it is positioned at the central shaft within pump case, and it is set in the rotor on described central shaft, two described stators are symmetric about described rotor, described stator includes shell support, shaping piece, iron core and multiple winding, multiple described windings are embedded in described shell support, described shaping piece is positioned at the side of multiple described winding, processed described shell support by embedding, described shaping piece and multiple described winding are solidified as a whole, form flat structure, described iron core removably connects with described flat structure, described rotor is between two described shaping pieces.The blood pump dual redundant motor that this utility model provides, not only compact conformation, take volume little, and its stator winding fixation, it is unlikely to deform, there is higher stability.
Description
Technical field
This utility model relates to machine field, particularly relates to a kind of blood pump dual redundant motor.
Background technology
A few days ago, the Multiple coil redundancy design aspect to brushless electric machine has done some Beneficials, the bigger stability that improve brushless electric machine and reliability both at home and abroad.But the design of double remaining motors of certain fields is the most ripe, such as: human assistance cardiac field.Human assistance heart has strict requirements to performance indications such as size, weight, temperature rise and the reliabilities of operation of motor, thus the Redundancy Design of the blood electric motor for pump in human assistance heart to be realized, the most do not increase its volume, the most difficult.
Chinese patent literature publication number CN102247628A discloses a kind of embedded type magnetic liquid suspension type centrifugal blood pump, it includes upper housing component, lower house assembly and impeller assembly, impeller assembly is between upper housing component and lower house assembly, described upper housing component includes upper shell, coil, stator core and upper end cover, coil and stator core are arranged in upper shell, upper shell is fixing with upper end cover to be connected, lower house assembly includes lower house, coil, stator core, upper end cover, central shaft housing, mandrel, the magnetostatic ring of magnetic suspension, pad and base, coil and stator core are arranged in lower house, lower house is fixing with bottom end cover to be connected, central shaft housing is integral with lower house structure.Coil in the motor of this structure is not owing to having obvious supporting construction, under the effect of magnetic force, is vulnerable to stator core or miscellaneous part extruding and deforms, so that the stability of centrifugal blood pump and reliability are had a greatly reduced quality.Additionally it has been disclosed that outside impeller, magnet steel is sector structure in patent, take up room bigger so that the space availability ratio of impeller is low.
Utility model content
In order to overcome the defect of prior art, technical problem to be solved in the utility model is to propose a kind of blood pump dual redundant motor, not only compact conformation, takies volume little, and its stator winding fixation, it is unlikely to deform, there is higher stability.
For reaching this purpose, this utility model by the following technical solutions:
This utility model provides a kind of blood pump dual redundant motor, including pump case, it is positioned at the end cap of described pump case both sides, it is fixed on the stator of described cover internal, it is positioned at the central shaft within pump case, and it is set in the rotor on described central shaft, two described stators are symmetric about described rotor, described stator includes shell support, shaping piece, iron core and multiple winding, multiple described windings are embedded in described shell support, described shaping piece is positioned at the side of multiple described winding, processed described shell support by embedding, described shaping piece and multiple described winding are solidified as a whole, form flat structure, described iron core removably connects with described flat structure, described rotor is between two described shaping pieces.
In this utility model preferably technical scheme, described shell support being provided with the die cavity that multiple and described winding profile is suitable, described winding is embedded in described die cavity.
In this utility model preferably technical scheme, described shaping piece is configured to the structure being made up of zirconia ceramics material.
In this utility model preferably technical scheme, described central shaft includes axle base, magnetostatic ring assemblies and nut, it is provided with screw rod on described axle base, described screw rod is one-body molded with described axle base, described magnetostatic ring assemblies is fixed on screw rod, described nut is positioned at the side of described magnetostatic ring assemblies, and coordinates with described screw flight.
In this utility model preferably technical scheme, described central shaft also includes shaft housing, described axle base includes the first joint portion and the second joint portion, described screw rod is fixed on described first joint portion, described shaft housing is socketed on described first joint portion, and with described first joint portion threaded engagement, described second joint portion and described shell support threaded engagement.
In this utility model preferably technical scheme, the top of described shaft housing is provided with tapered shunting cap.
In this utility model preferably technical scheme, described rotor includes impeller, is located at the dynamic magnetic ring component inside described impeller, is located at the magnet steel outside described impeller and for the sealing lid sealing described dynamic magnetic ring component, described magnet steel.
In this utility model preferably technical scheme, described sealing covers and is provided with annular protrusion, and described impeller is provided with annular groove, and described annular protrusion is suitable with described annular groove.
In this utility model preferably technical scheme, the fractional-slot that described blood pump dual redundant motor uses pitch to be 1 is arranged.
In this utility model preferably technical scheme, described magnet steel is configured to abnormity magnet steel, and described abnormity magnet steel is suitable with described impeller internal space.
In this utility model preferably technical scheme, being positioned in the middle part of the end cap above described pump case and be provided with pump intake, described pump intake is conducted with the inner chamber body of described pump case.
The beneficial effects of the utility model are:
The blood pump dual redundant motor that this utility model provides, two stator is symmetric about rotor, constitutes dual redundant structure, it is possible to the effective stability improving motor entirety, when a stator breaks down, another stator can also work on.Stator is made up of shell support, shaping piece, iron core and multiple winding; multiple windings are embedded in shell support; protected by shell support; it is not susceptible to deformation; and by embedding process, shell support, shaping piece and multiple winding are solidified as a whole, form flat structure so that the structural strength of stator entirety is greatly improved; and this flat structure, the space taken is less.Screw rod is one-body molded with axle base, and magnetostatic ring assemblies is fixed on screw rod, can effectively ensure the concentricity of screw rod and axle base, indirectly guarantee the concentricity that magnetostatic ring assemblies is installed.
Accompanying drawing explanation
Fig. 1 is the sectional view of the blood pump dual redundant motor that this utility model detailed description of the invention provides；
Fig. 2 is the structure chart of the first stator that this utility model detailed description of the invention provides；
Fig. 3 is the structure chart of the second stator that this utility model detailed description of the invention provides；
Fig. 4 is the structure chart of the central shaft that this utility model detailed description of the invention provides；
Fig. 5 is the structure chart of the rotor that this utility model detailed description of the invention provides；
Fig. 6 is the layout of the stator winding that this utility model detailed description of the invention provides；
Fig. 7 is the layout of the rotor magnetic steel that this utility model detailed description of the invention provides；
Fig. 8 is the Permanent-magnet bearing structural representation that this utility model detailed description of the invention provides.
In figure:
1, pump case；21, the first end cap；22, the second end cap；31, the first stator；32, the second stator 32；4, central shaft；5, rotor；6, pump intake；311, the first shell support；312, the first shaping piece；313, the first iron core；314, the first winding；321, the second shell support；322, the second shaping piece；323, the second iron core；324, the second winding；41, axle base；42, magnetostatic ring assemblies；43, nut；44, shaft housing；411, the first joint portion；412, the second joint portion；413, screw rod；441, tapered shunting cap；51, impeller；52, dynamic magnetic ring component；53, magnet steel；54, lid is sealed；511, annular groove；541, annular protrusion.
Detailed description of the invention
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by detailed description of the invention.
Embodiment one
As it is shown in figure 1, a kind of blood pump dual redundant motor provided in the present embodiment one, it is adaptable to human assistance heart, blood pump dual redundant motor includes pump case 1, end cap, stator, central shaft 4 and rotor 5.End cap includes that the first end cap 21 and the second end cap 22, first end cap the 21, second end cap 22 are positioned at the both sides of pump case 1, are symmetric about pump case 1, and is connected by laser welding process is fixing with pump case 1.Stator includes that the first stator 31 and the second stator 32, the first stator 31 and the second stator 32 use screw threads for fastening mode to be fixed on the both sides of pump case 1.First stator 31 is symmetric about rotor 5 with the second stator 32, constitute redundancy structure, when a stator in first stator the 31, second stator 32 breaks down, another stator can also continue normally to use, thus ensures the work that blood pump dual redundant motor is lasting, stable.Central shaft 4 is positioned at the middle part of pump case 1, rotor 5 is set on central shaft 4, and there is between central shaft 4 and rotor 5 certain gap, namely central shaft 4 is positioned at the inside of rotor 5, but do not contact with rotor 5, there is between central shaft 4 and rotor 5 repulsive force simultaneously, thus rotor 5 realizes radial equilibrium.It is positioned in the middle part of the end cap above pump case 1 and is provided with pump intake 6, pump intake 6 is conducted with the inner chamber body 11 of pump case 1, rotor 5 integrates the function rotated with impeller, the blood flowed into from pump intake 6 is through the effect of rotor 5, pump discharge from pump case 1 flows out again, it can be seen that, motor and blood pump are well combined by the blood pump dual redundant motor that this utility model provides, it is effectively reduced the volume of blood pump, it is adaptable to human assistance heart.
As in figure 2 it is shown, the first stator 31 is fixed by screws in the side of pump case 1, the first stator 31 stator includes the first shell support the 311, first shaping piece the 312, first iron core 313 and multiple first winding 314.As shown in Figure 6, multiple first windings 314 are embedded in the first shell support 311, circular array is distributed, the sector that the shape of the first winding 314 is substantially truncated in tip, using self-adhesive enameled wire coiling to form, the first shaping piece 312 is positioned at the side of multiple first winding 314, is processed by embedding and first shell support the 311, first shaping piece 312 and multiple first winding 314 is solidified as a whole, forming flat structure, the first iron core 313 is removably connected with flat structure by screw.As it is shown on figure 3, the second stator 32 is fixed by screws in the opposite side of pump case 1, the second stator 32 includes the second shell support the 321, second shaping piece the 322, second iron core 323 and multiple second winding 324.The annexation of each building block in the second stator 32 is substantially similar with the first stator 31.Therefore, the first stator 31 is symmetrical about rotor 5 with the second stator 32, constitutes dual redundant structure, it is ensured that the work that motor is permanent, stable.The profile of the first stator 31 and the second stator 32 is the most also flat so that the structure of above-mentioned blood pump dual redundant motor is extremely compact, it is little to take up room.
First stator 31 is with the second stator 32 difference: the middle part and second of the first shell support 311
The middle part shape of shell support 321, structure are the most different, and the middle through-hole of the first shell support 311 is suitable with the profile of pump intake 6 passage, and the first shell support 311 is socketed on pump intake 6.The middle through-hole of the second shell support 321 is suitable with the profile of central shaft 4, and with central shaft 4 threaded engagement.
First stator 31 and the second stator 32 are placed in " mirror image ", when being passed through three-phase current in the first stator 31 and the/the second stator 32, can produce rotating excitation field, drive rotor 5 to rotate.First stator 31 is arranged in parallel with the second stator 32, forms redundancy structure, it is ensured that the stability of motor.First iron core the 313, second iron core 323 is a part for magnetic circuit, and its effect is to provide magnetic field path.
Rotor 5 is between the first shaping piece 312 and the second shaping piece 322, in order to reduce dash current during friction torque and the electric motor starting of rotor 5, first shaping piece 312 is preferably with the second shaping piece 322 and is made up of zirconia ceramics material, it is high that zirconia ceramics material has hardness, be not susceptible to deformation, coefficient of friction little etc. feature.
As shown in Figure 4, further, central shaft 4 includes shaft housing 44, axle base 41, magnetostatic ring assemblies 42 and nut 43, axle base 41 includes the first joint portion 411 and the second joint portion 412, the diameter of the first joint portion 411 is less than the diameter of the second joint portion 412, it is provided with screw rod 413 on first joint portion 411, magnetostatic ring assemblies 42 is formed by organizing magnetostatic ring more, all it is socketed on screw rod 413, and in the gap that magnetostatic ring assemblies 42 is between shaft housing 44 and screw rod 413, the lower end of shaft housing 44 is socketed on the first joint portion 411, and with the first joint portion 411 threaded engagement, second joint portion 412 and the second shell support 321 threaded engagement.Screw rod 413 top is provided with screw thread, with nut 43 threaded engagement, after nut 43 screws, plays the effect of the axial displacement limiting magnetostatic ring assemblies 42, and ensures being detachably fixed of magnetostatic ring assemblies 42.Further preferred, first the 411, second joint portion 412, joint portion and screw rod 413 are one-body molded, one-body molded ensure that screw rod the 413, first joint portion the 411, second joint portion 412 three has preferable concentricity, thus indirectly make the magnetostatic ring assemblies 42 being arranged on screw rod 413 have preferable concentricity.
For the ease of shunting the blood flowed into from pump intake 6, shaft housing 44 top being provided with tapered shunting cap 441, its conical surface has certain radian.
As it is shown in figure 5, further, rotor 5 is used for producing multipole axial magnetic field, the rotating excitation field produced with the first stator 31 and/the second stator 32 interacts, thus causes the rotation of rotor 5.Rotor 5 includes impeller 51, dynamic magnetic ring component 52, magnet steel 53 and seals lid 54, impeller 51 is substantially in annular, centre is provided with through hole, so that rotor 5 is socketed on central shaft 4, dynamic magnetic ring component 52 is located at the inner side of impeller 51, i.e. near the side of through hole, magnet steel 53 is located at outside impeller 51, i.e. away from the side of through hole, seal lid 54 and be located at the bottom of impeller 51, for sealing dynamic magnetic ring component 52, magnet steel 53, anti-Hemostatic Oral Liquid is flowed in rotor 5, the dynamic magnetic ring component 52 of impact and the normal use of magnet steel 53.
So that seal lid 54 during assembling, easier for installation, further preferred, sealing, on lid 54, annular protrusion 541 is set, and annular groove 511 is set on impeller 51, annular protrusion 541 is suitable with annular groove 511, and annular protrusion 541 can be plugged in annular groove 511, so that position convenient when sealing the installation of lid 54.
As shown in Figure 6 and Figure 7, further, first stator the 31, second stator 32 is internal is provided with six groups of windings, is distributed in the circular array of 60 °, and rotor 5 is internal is provided with four groups of interlaced magnet steel of magnetic pole 53, is distributed in the circular permutations of 90 °.The number of phases of first stator the 31, second stator 32 is 3, and the pitch of first stator the 31, second stator 32 is 1, and pitch is 1 so that winding uniformly stacks without intersecting, and further reduces the space shared by stator, improves the blood pump space availability ratio of dual redundant motor.Further, since the quantity of magnet steel 53 is four, the quantity of winding is knowable to six, and stator and rotor 5 are that fractional-slot is arranged, and this setup can effectively weaken the loss of tooth-harmonic emf, improve the waveform of electromotive force.
As shown in Figure 7, so that motor obtains maximum torque, further preferred, magnet steel 53 is configured to abnormity magnet steel, abnormity magnet steel is suitable with impeller 51 inner space, the inner space of impeller 51 can be made full use of, thus in the case of not increasing blood pump dual redundant motor overall dimensions so that motor torque is the biggest.The cross section of abnormity magnet steel by two sections of circular arcs and two sections of rectilinear(-al)s, uses unsymmetric structure, and the most asymmetric sector is the most asymmetric, is owing to this structure can well utilize the inner space of impeller 51.
As shown in Figure 8, magnetostatic ring assemblies 42 is internal with dynamic magnetic ring component 52 to be provided with organizing the magnet ring that magnetic pole is relative more, concrete, magnetostatic ring assemblies 42 includes three groups of magnet rings, above-below direction is respectively arranged with a pair N pole magnet ring upward, and there is a pair S pole magnet ring upward centre, and dynamic magnetic ring component 52 also includes three groups of magnet rings, above-below direction is respectively arranged with a pair N pole magnet ring upward, and there is a pair S pole magnet ring upward centre.Above-mentioned magnet ring collectively constitutes repulsion type passive type magnetic suspension central shaft 4, and when rotor 5 occurs skew radially, central shaft 4 will produce restoring force so that rotor 5 tends to balance in radial direction.And in the axial direction, the flow dynamic pressure of generation of the magnetic force of the magnet steel 53 in magnetic force that rotor 5 is then produced with rotor 5 by central shaft 4, rotor 5 and stator, rotor gravity, liquid acts on jointly, and rotor 5 is made to be in dynamic balancing at axial direction.
In addition, the blood pump that this utility model provides dual redundant motor uses position-sensor-free design, only just need to can calculate the positional information of rotor, it is to avoid use mechanical position sensor that the position signalling of motor is detected by physical quantitys such as the detection voltage of motor, electric current, magnetic linkages.Taking motor space owing to mechanical position sensor has, need the drawbacks such as lead-out wire, the blood pump dual redundant electric machine structure using position-sensor-free design is simpler, keeps in repair convenient.
This utility model is described with reference to the preferred embodiments, and those skilled in the art know, in the case of without departing from spirit and scope of the present utility model, these features and embodiment can carry out various change or equivalence is replaced.This utility model is not limited to the particular embodiment disclosed, and other embodiments fallen in claims hereof broadly fall into the scope of this utility model protection.
Claims (10)
1. a blood pump dual redundant motor, the end cap including pump case (1), being positioned at described pump case (1) both sides, the stator being fixed on described cover internal, the central shaft (4) being positioned at pump case (1) inside and the rotor (5) being set on described central shaft (4), it is characterised in that:
Two described stators are symmetric about described rotor (5)；
Described stator includes shell support, shaping piece, iron core and multiple winding, multiple described windings are embedded in described shell support, described shaping piece is positioned at the side of multiple described winding, processed by embedding and described shell support, described shaping piece and multiple described winding are solidified as a whole, forming flat structure, described iron core removably connects with described flat structure；
Described rotor (5) is between two described shaping pieces.
Blood pump dual redundant motor the most according to claim 1, it is characterised in that:
Being provided with the die cavity that multiple and described winding profile is suitable on described shell support, described winding is embedded in described die cavity.
Blood pump dual redundant motor the most according to claim 1, it is characterised in that:
Described shaping piece is configured to the structure being made up of zirconia ceramics material.
Blood pump dual redundant motor the most according to claim 1, it is characterised in that:
Described central shaft (4) includes axle base (41), magnetostatic ring assemblies (42) and nut (43)；
Being provided with screw rod (413) on described axle base (41), described screw rod (413) is one-body molded with described axle base (41)；
Described magnetostatic ring assemblies (42) is fixed on screw rod (413)；
Described nut (43) is positioned at the side of described magnetostatic ring assemblies (42), and with described screw rod (413) threaded engagement.
Blood pump dual redundant motor the most according to claim 4, it is characterised in that:
Described central shaft (4) also includes shaft housing (44)；
Described axle base (41) includes the first joint portion (411) and the second joint portion (412)；
Described screw rod (413) is fixed on described first joint portion (411)；
Described shaft housing (44) is socketed on described first joint portion (411), and with described first joint portion (411) threaded engagement；
Described second joint portion (412) and described shell support threaded engagement.
Blood pump dual redundant motor the most according to claim 5, it is characterised in that:
Described shaft housing (44) top is provided with tapered shunting cap (441).
Blood pump dual redundant motor the most according to claim 1, it is characterised in that:
Described rotor (5) includes impeller (51), the dynamic magnetic ring component (52) being located at described impeller (51) inner side, is located at the magnet steel (53) in described impeller (51) outside and for the sealing lid (54) sealing described dynamic magnetic ring component (52), described magnet steel (53).
Blood pump dual redundant motor the most according to claim 7, it is characterised in that:
Described sealing is provided with annular protrusion (541) on lid (54)；
Annular groove (511) it is provided with on described impeller (51)；
Described annular protrusion (541) is suitable with described annular groove (511).
Blood pump dual redundant motor the most according to claim 7, it is characterised in that:
Described magnet steel (53) is configured to abnormity magnet steel, and described abnormity magnet steel is suitable with described impeller (51) inner space.
Blood pump dual redundant motor the most according to claim 1, it is characterised in that:
The fractional-slot that described blood pump dual redundant motor uses pitch to be 1 is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620441162.3U CN205792106U (en) | 2016-06-29 | 2016-06-29 | A kind of blood pump dual redundant motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620441162.3U CN205792106U (en) | 2016-06-29 | 2016-06-29 | A kind of blood pump dual redundant motor |
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| CN205792106U true CN205792106U (en) | 2016-12-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846625A (en) * | 2016-06-29 | 2016-08-10 | 北京精密机电控制设备研究所 | Dual redundancy motor for blood pump |
| CN112312835A (en) * | 2018-06-11 | 2021-02-02 | 苏黎世大学 | Blood pump for mechanical circulatory support of patients with squareness |
| CN116241486A (en) * | 2023-02-23 | 2023-06-09 | 泰格运控(江苏)技术有限公司 | Flat natural magnetic suspension high-speed compressor |
-
2016
- 2016-06-29 CN CN201620441162.3U patent/CN205792106U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846625A (en) * | 2016-06-29 | 2016-08-10 | 北京精密机电控制设备研究所 | Dual redundancy motor for blood pump |
| CN112312835A (en) * | 2018-06-11 | 2021-02-02 | 苏黎世大学 | Blood pump for mechanical circulatory support of patients with squareness |
| US12109404B2 (en) | 2018-06-11 | 2024-10-08 | Universität Zürich | Blood pump for mechanical circulatory support for Fontan patients |
| CN116241486A (en) * | 2023-02-23 | 2023-06-09 | 泰格运控(江苏)技术有限公司 | Flat natural magnetic suspension high-speed compressor |
| CN116241486B (en) * | 2023-02-23 | 2024-02-06 | 泰格运控(江苏)技术有限公司 | Flat natural magnetic suspension high-speed compressor |
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Effective date of registration: 20191227 Address after: 300457 workshop b3-04, b3-05 and b3-06, No. 17, No. 80, Haiyun street, Binhai New Area, Tianjin Patentee after: Aerospace Tai Xin Technology Co., Ltd. Address before: 100076 Beijing City, Fengtai District Dahongmen South East Highland Road No. 1 Patentee before: Beijing Research Institute of Precise Mechatronic Controls |