A kind of magnetic suspension motor and dust catcher
Technical field
The present invention relates to magnetic levitation technology field, more particularly to a kind of magnetic suspension motor and dust catcher.
Background technology
Miniature motor is the most common form for converting electrical energy into mechanical energy, is had in household electrical appliance and industrial circle
It is widely applied.Traditional motor mainly includes motor stator portion, rotor part, rotor supports bearing and casing
Part, is coupled by mechanical bearing between motor stator portion and rotor part or there is Mechanical Contact, therefore motor turns
There is mechanical friction in sub- motion process.
Mechanical friction not only increases the frictional resistance of rotor, moving component is worn and torn, and produces mechanical oscillation and noise, and
Part can be caused to generate heat, make lubricant degradation, serious meeting makes motor gas-gap uneven, heating in winding, temperature rise increase, from
And motor efficiency is reduced, it is final to shorten motor service life.And mechanical bearing needs lubricating oil to maintain, and so both influences electricity
The machine life-span is unfavorable for the cleaning of equipment again, therefore, in order to realize that long-life, the cleaning oil-free of ultrahigh rotating speed operation and equipment are necessary
Contactless supporting way, i.e. magnetic suspension supporting way are used in the motor.
The content of the invention
(1) technical problem to be solved
It is an object of the invention to provide a kind of magnetic suspension motor, solve magnetic suspension motor in the prior art can not realize it is small-sized
Change, the miniature motor of household electrical appliance and industrial circle, which can not be realized, to run at high speed, the problem of the life-span is low.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of magnetic suspension motor, including motor stator core, rotor
Axle, the shaft position sensor for detecting the armature spindle axial displacement and the axial direction for axially supporting the armature spindle
Magnetic bearing;The motor stator core is coaxially disposed with axial magnetic bearing, and the motor stator core and the axial magnetic
Bearing is set in the outside of the armature spindle;Also include radial support system, the radial support system includes two groups of permanent magnetism
Body group, set of permanent magnets described in every group includes radial rotor permanent magnet and radial stator permanent magnet, the radial rotor permanent magnet
The outside of the armature spindle is fixed on, the radial stator permanent magnet is set in the outside of the radial rotor permanent magnet, and institute
State the outer surface of radial rotor permanent magnet and leave gap with the inner surface of the radial stator permanent magnet;Set of permanent magnets described in two groups
It is separately positioned on the both sides of the motor stator core;And the radial stator of the radial rotor permanent magnet corresponding thereto
It is repulsive force between permanent magnet.
According to the present invention, the shaft position sensor is arranged on the non-output end of the armature spindle, and turns positioned at described
On the axially-extending line of sub- axle.
According to the present invention, the axial magnetic bearing is provided with two, and two axial magnetic bearings are separately positioned on the electricity
The both sides of machine stator iron core, and the two ends of the armature spindle are equipped with and are respectively cooperating with the magnetic conductors of the axial magnetic bearing both sides
Step surface, the magnetic conductor internal diameter of the close motor stator core side of the axial magnetic bearing is more than away from the motor
The internal diameter of stator core side magnetic conductor.
According to the present invention, in addition to housing, the motor stator core, radial stator permanent magnet and axial magnetic bearing are equal
It is fixed in the housing, the output end of the armature spindle is stretched out by the side of the housing.
According to the present invention, the housing includes the housing parts of two one end opens, and the openend of two housing parts can
A radial stator permanent magnet and an axial magnetic axis are respectively fixed with dismounting connection, each housing parts
Hold, housing parts one end relative with openend, which is provided with, is used for the axis hole that the armature spindle stretches out.
According to the present invention, the inner chamber of the housing parts is stepped to be set, by the opening of the housing parts to the axle
Chopped-off head step surface at the reduced diameter of step surfaces at different levels at hole, the opening of the housing parts is used to fix motor stator iron
Core, the radial stator permanent magnet and axial magnetic bearing are individually fixed in the different steps between the chopped-off head step surface and axis hole
On face.
According to the present invention, the radial stator permanent magnet is located at the axial magnetic bearing and the motor in the housing parts
Between stator core.
According to the present invention, armature spindle position corresponding with the motor stator core is provided with main permanent magnet.
According to the present invention, the main permanent magnet outer sheath is provided with carbon fibre materials sheath.
Present invention also offers a kind of dust catcher, including above-mentioned magnetic suspension motor.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that compared with prior art:Magnetcisuspension provided in an embodiment of the present invention
Floating motor realizes that the axial direction of armature spindle is supported by the axial magnetic bearing of setting, and the radial support of armature spindle employs permanent magnet
Radial rotor permanent magnet in group, set of permanent magnets reaches balance with radial stator permanent magnet by repulsive force, realizes for turning
The radial support of sub- axle, eliminates and radial direction magnetic is adjusted according to radial displacement transducer in the magnetic suspension motor course of work
Bearing for armature spindle attraction, it is simple in construction, reduce the volume of magnetic suspension motor, reduce cost.
Brief description of the drawings
Fig. 1 is the structural representation of magnetic suspension motor provided in an embodiment of the present invention.
In figure:1:Motor stator core;2:Armature spindle;3:Axial magnetic bearing;4:Shaft position sensor;5:Radial rotor
Permanent magnet;6:Radial stator permanent magnet;7:Housing parts;8:Main permanent magnet.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of magnetic suspension motor provided in an embodiment of the present invention, including motor stator core 1, armature spindle 2,
For detecting the shaft position sensor 4 of the axial displacement of armature spindle 2 and axial magnetic bearing 3 for axial support of rotor shaft 2;
Motor stator core 1 is coaxially disposed with axial magnetic bearing 3, and motor stator core 1 and axial magnetic bearing 3 are set in rotor
The outside of axle 2, skilled person will appreciate that between being left between motor stator core 1 and axial magnetic bearing 3 and armature spindle 2
Gap;Also include radial support system, radial support system includes two groups of set of permanent magnets, and every group of set of permanent magnets includes radial rotor
Permanent magnet 5 and radial stator permanent magnet 6, radial rotor permanent magnet 5 are fixed on the outside of armature spindle 2,6 sets of radial stator permanent magnet
It is located at the outside of radial rotor permanent magnet 5, and outer surface and the inner surface of radial stator permanent magnet 6 of radial rotor permanent magnet 5
Leave gap;Two groups of set of permanent magnets are separately positioned on the both sides of motor stator core 1, and radial rotor permanent magnet 5 is corresponding thereto
It is repulsive force between the radial stator permanent magnet 6 answered.
Magnetic suspension motor provided in an embodiment of the present invention realizes that the axial direction of armature spindle 2 is propped up by the axial magnetic bearing 3 of setting
Hold, the radial support of armature spindle 2 employs radial rotor permanent magnet 5 and radial stator permanent magnetism in set of permanent magnets, set of permanent magnets
Body 6 reaches balance by repulsive force, realizes the radial support for armature spindle 2, eliminates in the magnetic suspension motor course of work
The middle attraction that radial direction magnetic bearing is adjusted according to radial displacement transducer for armature spindle 2, it is simple in construction, reduce magnetic
The volume of floatation electric motor, reduces cost.
Preferably, the shaft position sensor 4 in the present embodiment is arranged on the non-output end of armature spindle 2, and positioned at rotor
On the axially-extending line of axle 2.Shaft position sensor 4 is arranged on the non-output end of armature spindle 2 so that the structure of magnetic suspension motor
It is compacter.
Preferably, axial magnetic bearing 3 is provided with two in the present embodiment, and two axial magnetic bearings 3, which are separately positioned on motor, to be determined
The both sides of sub- iron core 1, and the two ends of armature spindle 2 are equipped with the step surface being respectively cooperating with the magnetic conductor of the both sides of axial magnetic bearing 3,
Assembled for the ease of armature spindle 2 through axial magnetic bearing 3, the side of close motor stator core 1 of axial magnetic bearing 3 is led
Magnet inner diameter is more than the internal diameter away from the side magnetic conductor of motor stator core 1.The two ends of armature spindle 2 set an axial magnetic respectively
Bearing 3, armature spindle 2 passes through axial magnetic bearing 3 during assembling, make two magnetic conductors of axial magnetic bearing 3 respectively with armature spindle 2
Two step surface contacts can complete the installation of axial magnetic bearing 3, assemble simple and convenient.Two axial magnetic bearings 3 are realized respectively
The supporting of the left and right ends of armature spindle 2 is spacing, and the control of axial magnetic bearing 3 is simpler.Axial magnetic bearing 3 sets in the present embodiment
Put and be not limited to this or thrust disc is set on armature spindle 2, set an axial magnetic bearing 3 to be engaged with thrust disc,
The both sides of thrust disc need 3 points of axial magnetic bearing respectively as the bearing-surface of the support of rotor shaft 2 of axial magnetic bearing 3 during installation
Block is installed, and assembling is complicated.
Preferably, in the present embodiment magnetic suspension motor also include housing, motor stator core 1, radial stator permanent magnet 6 with
And axial magnetic bearing 3 is both secured in housing, the output end of armature spindle 2 is stretched out by the side of housing.Specifically, in the present embodiment
Housing includes the housing parts 7 of two one end opens, and the openend of two housing parts 7 is detachably connected, in each housing parts 7 respectively
A radial stator permanent magnet 6 and an axial magnetic bearing 3 are fixed with, the one end relative with openend of housing parts 7, which is provided with, to be used for
The axis hole that armature spindle 2 stretches out.Housing is set into two parts to be spliced, stator permanent magnet is provided with each housing parts 7
With axial magnetic bearing 3, it is possible to achieve modularized production, armature spindle 2 is arranged upper motor stator core 1 during assembling, and by rotor
The two ends of axle 2 are each passed through the radial stator permanent magnet 6 and axial magnetic bearing 3 of two housing parts 7, by stator core and housing parts
7 fix, and two housing parts 7, which are stitched together, can complete assembling, improve production efficiency, reduce cost.
Preferably, the inner chamber of housing parts 7 is stepped in the present embodiment is set, at opening to the axis hole of housing parts 7
Chopped-off head step surface at the reduced diameter of step surfaces at different levels, the opening of housing parts 7 is used to fix motor stator core 1, footpath
It is individually fixed in stator permanent magnet 6 and axial magnetic bearing 3 on the different step surfaces between chopped-off head step surface and axis hole.It is stepped
The fixation and positioning for being easy to all parts in housing are set.Preferably, radial direction stator permanent magnet in housing parts 7 in the present embodiment
6 are located between axial magnetic bearing 3 and motor stator core 1.Because the corresponding position armature spindle 2 of axial magnetic bearing 3 sets step
Cause diameter smaller, if axial magnetic bearing 3 to be arranged on to the position for being closer to motor stator core 1, armature spindle 2 can be caused
Diameter of axle change is excessive, influences the intensity and service life of armature spindle 2, and due to the radial rotor permanent magnet 5 of set of permanent magnets
Repulsion between radial stator permanent magnet 6 is relevant with area, and motor stator iron is closer to if axial magnetic bearing 3 is arranged on
The position of core 1, set of permanent magnets is arranged on the remote position of relative distance motor stator core 1, is providing same repulsion size
In the case of, need the set of permanent magnets width set to increase because the diameter of armature spindle 2 is small.Therefore, central diameter of the embodiment of the present invention
It is located to stator permanent magnet 6 between axial magnetic bearing 3 and motor stator core 1, it is ensured that while motor performance, enter one
Space is saved on step ground, makes structure compacter.Simultaneously as needing radial rotor permanent magnet 5 being fixed on armature spindle 2 during assembling
On, cause to be relatively large in diameter at this, radial stator permanent magnet 6, which is arranged between axial magnetic bearing 3 and motor stator core 1, is easy to dress
Match somebody with somebody.
Preferably, armature spindle 2 is provided with main permanent magnet 8 with the corresponding position of motor stator core 1 in the present embodiment.Main permanent magnetism
Body 8 and the formation rotor assembly common rotation of armature spindle 2, make the motor turn into magneto, compared to common electric machine, main permanent magnet
8 occupy little space, and structure is compacter.Further, the main outer sheath of permanent magnet 8 is protected provided with carbon fibre materials in the present embodiment
Set.Using the carbon fibre materials of high-strength low-density while protecting main permanent magnet 8 to avoid rupturing under the action of the centrifugal force, more
The lightweight of motor is ensure that in big degree.
The embodiment of the present invention additionally provides a kind of dust catcher, including above-mentioned magnetic suspension motor.Improve making for dust catcher
With the life-span, noise is reduced, systematic function is improved.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that:It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic;
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.