A kind of blood pump motor stator and magnetic liquid suspension formula blood electric motor for pumpTechnical field
The present invention relates to motor field, more particularly to a kind of blood pump motor stator and being equipped with above-mentioned blood pumpWith the magnetic liquid suspension formula blood electric motor for pump of motor stator.
Background technique
Small and special electric machine is widely used in the fields such as aerospace, medical instrument.In certain applications, to the size of motor,The performance indicators such as weight, temperature rise and reliability of operation have strict requirements, such as: human assistance heart, just to the shape of motorShape, structure and occupied space size etc. have more harsh requirement.
Existing human assistance heart motor is mostly traditional radial magnetic field motor, and motor stator is mostly cylinder, andUsually it is made of stator core and the winding being wrapped on stator core, this structure needs open up conduit on stator core,So that winding is embedded into stator core, to realize the fixation of winding.The above-mentioned radial magnetic field motor stator meeting with conduitSo that the size of motor, weight are larger, occupied space is more and working efficiency is low, is unable to satisfy novel magnetic liquid suspension centrifugationDemand of the formula human assistance heart to motor stator.In addition, conduit is opened up on stator core, it is certain due to having between conduitSpacing, and be limited to the mode of rotor cutting magnetic induction line, more apparent pulsating torque can be generated in rotor rotation process, it is thisPulsating torque is unfavorable for the stability of rotor operation.
Summary of the invention
In order to overcome the drawbacks of the prior art, technical problem to be solved by the present invention lies in propose a kind of blood electric motor for pumpStator, it is compact-sized in flat, it occupies little space, is suitable for the centrifugal human assistance heart of magnetic liquid suspension.
The present invention also technical problems to be solved are to propose a kind of magnetic liquid suspension formula blood electric motor for pump, operational efficiencyHeight, and above-mentioned blood pump motor stator is installed, the dual redundant structure of human assistance heart motor may be implemented, greatly improvedThe stability and reliability of human assistance heart.
To achieve this purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of blood pump motor stator, including stator core, multiple stator winding, stator support andSpacer, multiple stator winding are set in the stator support, and the stator core is fixed on the stator supportOn one side, the spacer is fixedly connected with the another side of the stator support, the stator support, the spacer andThe stator core surrounds a flat cylindrical space, and multiple stator winding circular array distributions are fixed on described flatA part of the inside of cylindrical space, the stator core is inserted into the stator support, is connected with multiple stator windingTouching.
In preferably technical solution of the invention, the stator support includes fixed for installing the first of magnetic levitation componentBracket and the second fixed bracket for installing the stator core, the described first fixed bracket are located at the described second fixed bracketMiddle part, multiple stator winding are located at the annular gap between the described first fixed bracket and the second fixed bracketIn.
Annular in preferably technical solution of the invention, between the described first fixed bracket and the second fixed bracketIt is provided with a plurality of non-magnetic reinforcing rib in gap, two adjacent non-magnetic reinforcing ribs, positioned at two adjacent non-magnetic reinforcementsDescribed first support bracket fastened a part and described second between two adjacent non-magnetic reinforcing ribs between muscleSupport bracket fastened a part surrounds coiled pipe type chamber, and the coiled pipe type chamber is adapted with the shape of the stator winding, the statorIt is intracavitary that winding is embedded into the coiled pipe type.
In preferably technical solution of the invention, it is provided between the stator support and the stator core for magnetic forceThe gasket of adjusting.
In preferably technical solution of the invention, multiple stator winding inside the flat cylindrical space are carried outEncapsulating processing.
In preferably technical solution of the invention, it is provided on the first support bracket fastened one side for preventing encapsulatingThe enclosing structure that casting glue overflows in treatment process.
In preferably technical solution of the invention, it is provided on the described second fixed bracket and is drawn for the stator windingLead notch derived from line.
In preferably technical solution of the invention, through-hole is provided in the middle part of the stator core, the stator coreEdge is provided with epitaxial structure, and the epitaxial structure is overlapped on the stator support.
In preferably technical solution of the invention, the spacer is configured to the structure made of zirconia ceramics material.
In preferably technical solution of the invention, the set-up mode of the stator winding is configured to the fractional-slot that pitch is 1Form.
In preferably technical solution of the invention, the spacer is configured to the structure made of zirconia ceramics material simultaneouslyAnd the set-up mode of the stator winding is configured to the score slot form that pitch is 1.
The present invention also provides a kind of magnetic liquid suspension formula blood electric motor for pump, including rotor and above-mentioned blood electric motor for pumpStator, the blood motor rotor for pump are located in the liquid between two blood pump motor stators.
The invention has the benefit that
The present invention provides a kind of blood pump motor stator, by stator core, multiple stator winding, stator support and everyIt is formed from four part of piece, the flat cylindrical space that stator support, spacer and stator core surround, and outside blood pump motor statorThe substantially flat column structure of shape, this flat column structure occupy little space, lighter in weight, and it is centrifugal to be suitable for magnetic liquid suspensionHuman assistance heart.In addition, multiple stator winding are each attached in above-mentioned flat cylindrical space, compared with the prior art for, adoptWith this structure of the invention, without slotting in stator core, i.e., stator core uses slotless configuration, and this structure can substantially dropThe pulsating torque generated in low blood electric motor for pump operational process since stator core is slotted.
The present invention also provides a kind of magnetic liquid suspension formula blood electric motor for pump, are equipped with above-mentioned blood pump motor stator, can be withThe dual redundant structure of human assistance heart motor, i.e. bimorph transducer redundancy structure are realized, conducive to the steady of human assistance heart is improvedQualitative and reliability.
Detailed description of the invention
Fig. 1 is the front view for the blood pump motor stator that the specific embodiment of the invention provides；
Fig. 2 is the sectional side view for the blood pump motor stator that the specific embodiment of the invention provides；
Fig. 3 is the perspective view for the stator support that the specific embodiment of the invention provides；
Fig. 4 is the sectional side view for the stator core that the specific embodiment of the invention provides.
In figure:
1, stator core；2, stator winding；3, stator support；4, spacer；31, the first fixed bracket；32, second is fixedBracket；5, reinforcing rib；6, coiled pipe type chamber；311, enclosing structure；321, lead notch；11, through-hole；12, epitaxial structure；7, spiral shellNail；8, gasket.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one
As illustrated in fig. 1 and 2, the blood pump motor stator provided in the present embodiment one, including stator core 1, stator support3, spacer 4 and six stator winding 2.Referring to fig. 2, stator core 1 is fixed on the right side of stator support 3 by screw 7On, spacer 4 is fixedly connected with the left side of stator support 3, and the mode being fixedly connected preferably is bonded, and spacer 4 is used for willLiquid and blood pump are separated with motor stator other structures, and human assistance heart centrifugal for magnetic liquid suspension, liquid refers to bloodLiquid.Stator support 3, spacer 4 and stator core 1 surround a flat cylindrical space, and general shape is the lesser cylinder of heightShape, six 2 circular array of stator winding distributions are fixed on the inside of flat cylindrical space, for providing electricity to blood electric motor for pumpMagnetic field.In a part insertion stator support 3 of stator core 1, it is in contact with the side of six stator winding 2, for statorWinding 2 provides magnetic field path.Due to six stator winding be located at stator support 3, spacer 4 and stator core 1 surround it is flatIn cylindrical space, and blood pump motor stator shape is also substantially flat column structure, so that above-mentioned blood pump motor stator knotStructure is extremely compact, occupies little space, and is very suitable for using in the centrifugal human assistance heart of magnetic liquid suspension.Compared with the prior art andSpeech, using this structure of the invention, without slotting in stator core, i.e., stator core uses slotless configuration, this structure energyThe pulsating torque generated in blood electric motor for pump operational process since stator core is slotted is greatly reduced, improves blood electric motor for pump fortuneCapable stability.
As shown in figure 3, further technical solution, stator support 3 includes the first fixed bracket 31 and the second fixed bracket32, the first fixed bracket 31 is for installing magnetic levitation component, and the second fixed bracket 32 is for installing stator core 1.First is fixedBracket 31 is cylindrical, is internally provided with the screw thread for being easily installed magnetic levitation component, the second fixed bracket 32 is annular in shape, positionIn the middle part of the second fixed bracket 32, six stator winding 2 are set between the first fixed bracket 31 and the second fixed bracket 32In annular gap, the fixation of stator winding 2 can be realized by being potted processing to stator winding 2 at this time.
In order to which the insulation system reinforced the structural strength of stator support 3 and protect stator winding 2 is not destroyed, more into oneStep, a plurality of non-magnetic reinforcing rib 5, phase are provided in the annular gap between the first fixed bracket 31 and the second fixed bracket 32One of two adjacent non-magnetic reinforcing ribs 5, the between two adjacent non-magnetic reinforcing ribs 5 first fixed bracket 31It is divided to and a part of the between two adjacent non-magnetic reinforcing ribs 5 second fixed bracket 32 surrounds coiled pipe type chamber 5.Coiled pipe type chamber 5 has multiple arcs side, and substantially fan-shaped, shape is adapted with the shape of stator winding 2.Due to stator winding2 be powered after can generate powerful magnetic field, therefore stator winding 2 is embedded into coiled pipe type chamber 5, enable to stator winding 2 by aroundThe protection of group type chamber 5, and be not easy to deform and insulation damages.
In order to further strengthen the integral firmness of blood pump motor stator and stator winding 2 be made to be closed in bio-compatibleIn good, the highly-safe medical material of property, further, to some or all of stator winding 2 inside flat cylindrical spaceIt is potted processing.After the completion of encapsulating processing, stator support 3, spacer 4 and six stator winding 2 will be solidified as a whole.EncapsulatingGlue is preferably the medical adhesive for meeting FDA standard, such as: epoxy resin, this casting glue is in addition to that can enhance blood pump motor statorOutside intensity, also have the function of reinforced insulation and thermal conductivity.
It is worth noting that, when stator support 3 fixes bracket 31 and the second fixed bracket 32 for only first, and without addingWhen strengthening tendons 5, it can also be realized by casting glue fixed to stator winding 2.
Casting glue overflows in potting process in order to prevent, it is further preferred that in the one side of the first fixed bracket 31Upper setting enclosing structure 311, enclosing structure 311 is for preventing casting glue in encapsulating treatment process from overflowing, enhancing casting glue sealingEffect keeps the outer dimension of blood pump motor stator unaffected.
For the ease of the introducing and extraction of 2 conducting wire of stator winding, further, lead is set on the second fixed bracket 32Notch 321, after stator winding 2 is embedded in coiled pipe type chamber 5,2 lead-out wire of stator winding is exported from lead notch 321.
As shown in Fig. 2, in order to adjust magnetic force between stator core 1 and blood motor rotor for pump, further, in stator branchGasket 8 is set between frame 3 and stator core 1, by the gap between the adjustable stator core 1 of gasket 8 and stator support 3,Namely the gap between stator core 1 and blood motor rotor for pump, so that stator core 1 and blood pump are realized in the adjustment by gapWith the matching of magnetic force between rotor, adjustment.
As shown in figure 4, further, the middle part of stator core 1 is provided with through-hole 11, and the first fixed bracket 31 is inserted into logicalIn hole 11, so that the mechanism of blood pump motor electronic is more compact.It is provided with releasing agent layer on stator core 1, even encapsulatingAfter the completion of processing, stator core 1 there are releasing agent layer also because can very easily dismount.
Gravitation compressing stator winding hair is generated in order to avoid the magnet steel of stator core 1 and blood motor rotor for pump attracts each otherRaw deformation, it is preferred that in the edge of stator core 1, epitaxial structure 12 is set, epitaxial structure 12 is overlapped on stator support 3,The contact area of stator support 3 Yu stator core 1 is increased, the axial displacement of extension mechanism 12 is limited.
In order to improve the hardness of spacer 4, reduce the coefficient of friction of spacer 4, it is preferred that by spacer 4 be configured to byThe hardness of structure made of zirconia ceramics material, ceramic material is high, is not susceptible to deform, when can reduce the starting of blood electric motor for pumpFriction torque, reduce electric motor starting when dash current.
The number of stator winding 2 can be six, 12 or other numbers, and producer can more actual needs closeReason setting.In order to enable the type blood pump is suitable for the centrifugal human assistance heart of magnetic liquid suspension with motor stator, it is preferred that statorThe set-up mode of winding 2 is configured to the score slot form that pitch is 1.Specifically, blood pump provided by the invention has with motor statorThere are six stator winding 2, the number of phases 3, magnet steel number of poles is 4, and pitch is equal to slot number 6 divided by magnet steel number of poles 4, round numbers, i.e. pitchIt is 1.Pitch is 1 length for advantageously reducing 2 end of stator winding, reduces space, improves the operational efficiency of blood electric motor for pump.ThisIt invents the blood pump provided to be designed with motor stator using fractional-slot, this setup can effectively weaken the damage of tooth-harmonic emfConsumption, improves the waveform of electromotive force, reduces the burst loss of magnetic pole surfaces.
Embodiment two
A kind of magnetic liquid suspension formula blood electric motor for pump provided by the invention, including the above-mentioned blood pump electricity consumption of rotor and twoMachine stator, blood motor rotor for pump are located between two blood pump motor stators in liquid, constitute redundant unit, can further mentionThe reliability and stability of high blood electric motor for pump, the blood pump electricity consumption being particularly suitable in the centrifugal human assistance heart of magnetic liquid suspensionMachine.
Further, magnetic liquid suspension formula blood electric motor for pump further includes upper pump case and lower pump case, and two stators are symmetric,It is separately fixed on pump case and lower pump case.
The present invention is described with reference to the preferred embodiments, and those skilled in the art know, of the invention not departing fromIn the case where spirit and scope, various changes or equivalence replacement can be carried out to these features and embodiment.The present invention is not by thisThe limitation of specific embodiment disclosed in place, other embodiments fallen into claims hereof belong to protection of the present inventionRange.