A kind of magnetic suspension rotor supporting system, magnetic suspension motor and dust catcher
Technical field
The present invention relates to motor technology field, more particularly to a kind of small-sized magnetic suspension rotor supporting system, magnetic suspension
Motor and the dust catcher provided with the motor.
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 electronics 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 rotor supporting system, magnetic suspension motor can not in the prior art for solution
Realize miniaturization, the problem of production cost is high;
It is a further object of the present invention to provide a kind of magnetic suspension motor, household electrical appliance and industrial circle in the prior art are solved
Miniature motor can not realize and 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 rotor supporting system, including housing, radial direction
Displacement transducer, radial magnetic bearing and axial magnetic suspension bearing;The radial displacement transducer, radial magnetic bearing
And axial magnetic suspension bearing is co-axially located in housing;The housing is along the radial displacement transducer, axial magnetic
One end of the arragement direction of bearing and axial magnetic suspension bearing is provided with opening, and for accommodating motor stator core, the other end is set
There is the axis hole stretched out for armature spindle.
According to the present invention, the inner chamber of the housing is stepped to be set, at opening to the axis hole of the housing
The reduced diameter of step surfaces at different levels;Chopped-off head step surface at the shell nozzle is used to fix motor stator core, described
Radial displacement transducer, radial magnetic bearing and axial magnetic suspension bearing are individually fixed in the chopped-off head step surface and axis hole
Between different step surfaces on, and the axial magnetic suspension bearing be located between the axis hole and the radial magnetic bearing.
According to the present invention, the housing is set using hollow out mode.
According to the present invention, the hull outside is provided with the ribs set along the opening of the housing to the direction of axis hole,
The ribs are provided with a plurality of, and a plurality of ribs being provided at circumferentially spaced along the housing.
According to the present invention, it is close to be fixed with what is be coaxially disposed with the radial magnetic bearing on the final stage step surface of axis hole
Play floating ring.
According to the present invention, described floating ring is mechanical bearing, graphite annulus or becket.
Present invention also offers a kind of magnetic suspension motor, including motor stator core, armature spindle and two above-mentioned magnetic
Suspension rotor supporting system, two magnetic suspension rotor supporting systems are symmetricly set on the both sides of the motor stator core,
Dock to form motor housing at the shell nozzle of two magnetic suspension rotor supporting systems;The rotor axle sleeve is located at two institutes
State in magnetic suspension rotor supporting system and motor stator core, and the armature spindle and two magnetic suspension rotor supporting systems with
And gap is diametrically left between motor stator core;The output end of the armature spindle is supported by the magnetic suspension rotor
The axis hole of system stretches out;Also include the shaft position sensor for being used to measure the armature spindle axial displacement.
According to the present invention, one end of the armature spindle is output end, and the other end is non-output end, the axial displacement sensing
Device is fixed at the axis hole of the corresponding magnetic suspension rotor supporting system of the non-output end.
According to the present invention, the housing link position of two magnetic suspension rotor supporting systems is provided with the inner stopper being engaged
And male half coupling.
According to the present invention, the armature spindle at the motor stator core cooperation with being arranged with permanent magnet.
According to the present invention, sheath is coated with the outside of the permanent magnet.
According to the present invention, the sheath uses carbon fibre materials.
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:
(1) magnetic suspension rotor supporting system provided in an embodiment of the present invention is by radial displacement transducer, axial magnetic axle
Hold and axial magnetic suspension bearing be integrated into a housing, can for supporting motor rotor axle one end, compact conformation fit
Production for miniature motor;Two magnetic suspension rotor supporting system splicings are completed to the assembling of motor when using, realized
Modularized production, compared to individually multiple assembling parts formation motors, number of parts is less during modularized production, can protect first
The axiality of each part in magnetic suspension rotor supporting system is demonstrate,proved, is conducive to improving the overall coaxial precision of motor, improves life
Efficiency is produced, cost is reduced.
(2) magnetic suspension motor provided in an embodiment of the present invention is spliced using two magnetic suspension rotor supporting systems, knot
Structure is compact, realizes the non-contact support of motor rotor shaft, make it possible its ultrahigh rotating speed, it is super it is steady, super geostationary run, and
And the long-life of equipment can be realized departing from the limitation of mechanical bearing, clean oil-free, it is adaptable to household electrical appliance and industry neck
Domain back yard industry equipment etc..
Brief description of the drawings
Fig. 1 is the sectional view of magnetic suspension rotor supporting system provided in an embodiment of the present invention;
Fig. 2 is the 3-D view that system is made in magnetic suspension rotor provided in an embodiment of the present invention;
Fig. 3 is the sectional view of magnetic suspension motor provided in an embodiment of the present invention;
Fig. 4 is the decomposition view of magnetic suspension motor provided in an embodiment of the present invention.
In figure:101:Magnetic suspension rotor supporting system;1:Housing;2:Radial displacement transducer;3:Radial magnetic bearing;
4:Axial magnetic suspension bearing;5:Axis hole;6:Ribs;7:Play floating ring;8:Motor stator core;9:Armature spindle;10:Axial displacement
Sensor;11: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 depicted in figs. 1 and 2, a kind of magnetic suspension rotor supporting system 101 provided in an embodiment of the present invention, including housing 1,
Radial displacement transducer 2, radial magnetic bearing 3 and axial magnetic suspension bearing 4;Radial displacement transducer 2, axial magnetic
Bearing 3 and axial magnetic suspension bearing 4 are co-axially located in housing 1;The radially displaced sensor 2 of housing 1, axial magnetic
One end of the arragement direction of bearing 3 and axial magnetic suspension bearing 4 is provided with opening, for accommodating motor stator core 8, the other end
Provided with the axis hole 5 stretched out for armature spindle 9.Magnetic suspension rotor supporting system 101 provided in an embodiment of the present invention is by radial displacement
Sensor 2, radial magnetic bearing 3 and axial magnetic suspension bearing 4 are integrated into a housing 1, can be for support motor
One end of armature spindle 9, compact conformation is applied to the production of miniature motor;By two magnetic suspension rotor supporting systems when using
101 splicings complete the assembling of motor, realize modularized production, compared to individually multiple assembling parts formation motors, modularization
Number of parts is less during production, can ensure the axiality of each part in magnetic suspension rotor supporting system 101 first, be conducive to
The overall coaxial precision of motor is improved, production efficiency is improved, reduces cost.
Preferably, the inner chamber of housing 1 is stepped in the present embodiment is set, at different levels at opening to the axis hole 5 of housing 1
The reduced diameter of step surface;Chopped-off head step surface at the opening of housing 1 is used to fix motor stator core 8, and radial displacement is passed
Sensor 2, radial magnetic bearing 3 and axial magnetic suspension bearing 4 are individually fixed in the difference between chopped-off head step surface and axis hole 5
On step surface, and axial magnetic suspension bearing 4 is located between axis hole 5 and radial magnetic bearing 3.Due to axial magnetic suspension bearing 4
The diameter of corresponding position armature spindle 9 is smaller, and motor stator core 8 is closer to if axial magnetic suspension bearing 4 is arranged on
Position, can cause the diameter of axle of armature spindle 9 to change excessive, the influence intensity of armature spindle 9 and service life, and due to radial direction magnetcisuspension
It is relevant with adsorption area that floating axle holds 3 buoyancy provided, and motor stator iron is closer to if axial magnetic suspension bearing 4 is arranged on
The position of core 8, radial magnetic bearing 3 sets the remote position of relative distance motor stator core 8, is providing same buoyancy
In the case of, need the thickness of radial magnetic bearing 3 set to increase because the diameter of rotating shaft is small.Therefore, the embodiment of the present invention
Middle housing 1 is stepped to be set, and axial magnetic suspension bearing 4 is arranged between radial magnetic bearing 3 and axis hole 5, it is ensured that
While motor performance, space can be further saved, make structure compacter.
Preferably, housing 1 is set using hollow out mode in the present embodiment.By housing 1 be set to hollow out be conducive to radiating,
Material is reduced, and is easy to cabling.Further, the outside of housing 1 is provided with along the opening of housing 1 to axis hole 5 in the present embodiment
The ribs 6 that direction is set, ribs 6 are provided with a plurality of, and being provided at circumferentially spaced along housing 1 of a plurality of ribs 6.Support is set
Rib 6 is conducive to improving the intensity of housing 1.
Preferably, it is fixed with the final stage step surface that axis hole 5 is close in the present embodiment and radial magnetic bearing 3 is coaxial sets
That puts plays floating ring 7.Further, it can be mechanical bearing, graphite annulus or becket to play floating ring 7.Rise floating ring 7 and armature spindle 9 it
Between gap be less than gap between radial magnetic bearing 3 and armature spindle 9, armature spindle 9 floats when starting for stand-by motor
And the armature spindle 9 during support motor stopping, playing a part of support protection when armature spindle 9 shuts down and fallen.Need
It is bright, play the ring that floating ring 7 is not limited to above-mentioned several forms or other materials.In addition, playing rising for floating ring 7
Floating effect can also, by axis hole 5 is directly realized, no longer be set and individually play floating ring 7, but be due to housing 1 typically using modeling
Material is made, and intensity and hardness are all difficult to ensure that to support for a long time and protect armature spindle 9.
The embodiment of the present invention additionally provides a kind of magnetic suspension motor, as shown in Figure 3 and Figure 4, including motor stator core 8,
Armature spindle 9 and two magnetic suspension rotor supporting systems 101, two magnetic suspension rotor supporting systems 101 are symmetricly set on motor
Docking forms motor housing at the both sides of stator core 8, the opening of housing 1 of two magnetic suspension rotor supporting systems 101;Armature spindle
9 are set in two magnetic suspension rotor supporting systems 101 and motor stator core 8, and armature spindle 9 and two magnetic suspension rotors
Gap is diametrically left between supporting system 101 and motor stator core 8;The output end of armature spindle 9 is turned by magnetic suspension
The axis hole 5 of sub- supporting system 101 stretches out;Also include the shaft position sensor 10 for being used to measure the axial displacement of armature spindle 9.Motor
When not working, rotor, which falls, to be risen on floating ring 7, when being not provided with floating ring 7, is directly fallen on the axis hole 5 of housing 1, is started working
When, according to the test position of radial displacement transducer 2 and shaft position sensor 10 to radial magnetic bearing 3 and axial magnetcisuspension
Floating axle holds 4 carry out active controls, by controlling the suction of radial magnetic bearing 3 and axial magnetic suspension bearing 4 to reach armature spindle 9
Suspension, by the output end output torque of armature spindle 9, start working.In motor power cut-off, motor stops output torsion first
Square, armature spindle 9 is stopped in suspended state reduction of speed to zero, then magnetic suspension bearing, and armature spindle 9 drops back into floating position.This hair
The high speed magnetic suspension motor that bright embodiment is provided is spliced using two magnetic suspension rotor supporting systems 101, compact conformation, real
Showed the non-contact support of motor rotor shaft 9, make it possible its ultrahigh rotating speed, it is super it is steady, super geostationary run, and departing from
The limitation of mechanical bearing can realize the long-life of equipment, clean oil-free, it is adaptable to household electrical appliance and the small-sized work of industrial circle
Industry equipment etc..
Preferably, one end of armature spindle 9 is output end in the present embodiment, and the other end is non-output end, axial displacement sensing
Device 10 is fixed at the axis hole 5 of the corresponding magnetic suspension rotor supporting system 101 of non-output end.Shaft position sensor 10 is fixed on
The non-output end of armature spindle 9, is not take up the space in housing 1, and overall structure is compacter.
Preferably, the link position of housing 1 of two magnetic suspension rotor supporting systems 101 is provided with what is be engaged in the present embodiment
Inner stopper and male half coupling.Two accurate positionings of housing 1 can be caused by being engaged by the inner stopper and male half coupling of setting, be conducive to
Keep the axiality of two magnetic suspension rotor supporting systems 101.Connection between two housings 1 can be connected by pin,
Can also be the modes such as bonding, threaded connection.
Preferably, it is arranged with permanent magnet 11 at armature spindle 9 and the cooperation of motor stator core 8 in the present embodiment.Permanent magnet 11
With the formation rotor assembly common rotation of armature spindle 9, the motor is set to turn into magneto, compared to common electric machine, permanent magnet 11 is accounted for
Small with space, structure is compacter.Further, the outside of permanent magnet 11 is coated with sheath in the present embodiment.Sheath is set to keep away
Exempt from permanent magnet 11 to rupture under the action of the centrifugal force, improve the service life of permanent magnet 11.Specifically, armature spindle 9 in the present embodiment
The permeability magnetic material of high intensity, such as 40Cr, 40CrNiMo etc. can be used.Sheath uses high intensity non-magnet_conductible material such as carbon fiber,
3J40, GH4169.The lightweight of motor is ensure that to a greater extent using the carbon fibre materials of high-strength low-density.Radial direction magnetcisuspension
Floating magnetic bearing motor stator core 8 uses high permeability material such as silicon steel, electrical pure iron, 1J50,1J22.
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.