CN106452007A - A multi-disc type large power limited-moment type permanent-magnetism eddy current shaft coupling - Google Patents
A multi-disc type large power limited-moment type permanent-magnetism eddy current shaft coupling Download PDFInfo
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- CN106452007A CN106452007A CN201610994974.5A CN201610994974A CN106452007A CN 106452007 A CN106452007 A CN 106452007A CN 201610994974 A CN201610994974 A CN 201610994974A CN 106452007 A CN106452007 A CN 106452007A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K51/00—Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
Abstract
The invention belongs to the field of mechanical transmission. In order to use the shaft coupling to limit a transmission torque of a motor and a transmission system, to protect transmission components from shock overload and to ensure the normal operation of a host machine, a multi-disc type large power limited-moment type permanent-magnetism eddy current shaft coupling is thus provided. The multi-disc type large power limited-moment type permanent-magnetism eddy current shaft coupling comprises an input shaft sleeve, a transition connection disc, a left auxiliary casing, a spline sleeve, an output spline shaft, etc. Several magnet plates and conductor plates which are alternately stacked are arranged in the spline sleeve. Each of the magnet discs is circumferentially embedded with an even-number of permanent magnets in which N and S poles are alternately arranged. Permanent magnets of the adjacent magnet discs are axially opposed, and magnetic poles of the adjacent magnet discs are opposite. Inner rings of the two adjacent surfaces of each two adjacent conductor disc and magnet disc are provided with a plurality of small magnets axially opposed and having the same magnetic poles, so that the magnet plate and the conductor plate are not in contact due to the repulsive force. The multi-disc type large power limited-moment type permanent-magnetism eddy current shaft coupling of the invention employs a multi-disc type structure, so that the permanent-magnetic driving power can be raised without increase in the radial structural dimension of a permanent magnetism transmission device. The multi-disc type large power limited-moment type permanent-magnetism eddy current shaft coupling can be widely applied to occasions where the radial space is limited and the axial direction space is large.
Description
Technical field
The invention belongs to mechanical transmission fields, are mainly used in the impact such as mine flight conveyer and disintegrating machine and frequently set
Standby, and in particular to a kind of high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type.
Background technology
The kind of drive of motor-shaft coupling-decelerator is the most frequently used type of drive in plant equipment.In the drive mechanism
In, the input of shaft coupling is connected with motor output shaft by the axle sleeve with keyway, and outfan is connected with reducer input shaft
Connect.In drive system running, due to the motional inertia of rotor, when there is impact load, can be to passing in drive system
Dynamic element forms inertia impact, damages actuated element, affects the reliability service of drive system, and disorderly closedown happens occasionally, especially
It is that impact is frequently loaded, such as disintegrating machine and mine flight conveyer, the fault that impact load causes is especially prominent.
In conventional mechanical transmission mode, the shaft coupling with overload protection performance mainly has friction torque-limiting clutch, fluid power
Shaft coupling etc..When impact load frequently occurs, overload protection arrangement also frequent movement, friction torque-limiting clutch is because of abrasive action
Frequently so that friction plate friction and premature breakdown, affect its working life and service behaviour, and transship when skidding, it is impossible to unload
Carry so that actuated element is often damaged in heavy-duty service state, causes main shut-down system because of its fault.Fluid coupling is adopted
Power is transmitted with liquid medium, when stall occurs, liquid medium steep temperature rise, hydrojet because of acting so that fluid-flywheel clutch
Operating interruptions, need fluid injection again just work on.
With the progress of rare earth permanent magnet technology, existed using the permanent magnet eddy current coupling of non-contacting air dielectric transmission power
Mechanical transmission fields are just applied more and more.Practical application shows, permanent magnet eddy current coupling characteristic can be answered well
Used in inflammable and explosive, moist, dust content is high, the adverse circumstances such as voltage pulsation is big, harmonic content is higher, impact load is frequent.
But the wide variety of disc type distance-limiting type permanent magnet eddy current coupling of mechanical transmission fields yet suffers from some problems at present：（1）?
During permanent magnet clutch work, as motor or decelerator bearing have axial gap, the axial motion of axle can not ensure conductor disc
Gap with magnet disk；When bearing damage, the axial float of axle can cause magnet disk and conductor disc mutually to collide so as to damage
Bad.（2）To improve transmission power, a kind of method is to increase magnet disk and conductor disc diameter, but this method can make which in footpath
It is restricted to the machine driving applications of limited space；Another kind of method is to increase the quantity of magnet disk and conductor disc, and
Respectively multiple magnet disk and multiple conductor disc are cascaded, but this method is conductor disc and magnet disk is individually fixed in motor shaft
On upper and reducer shaft, conductor disc and magnet disk contact-impact or conductor can be caused due to the play of motor shaft or reducer shaft
The gap of disk both sides, produces additional responsive to axial force in motor or decelerator bearing.
The weak point of existing patented technology：
（1）Patent 201410751627.0（A kind of packet concatenation formula permanent magnet clutch）
" packet concatenation formula " i.e. permanent magnetism body disc component and conductor disc component interphase distribution, by multiple permanent magnetism body disc components and multiple lead
Body disc component is together in series and constitutes permanent magnetism body disc and conductor disc, and is connected with motor shaft or bearing axle.From legend is implemented, should
In device standing or work process, permanent magnetism body disc component is immobilized with air gap between conductor disc component, belongs to fixing air gap
Permanent magnet clutch, with this patent（The high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type）There is essential distinction.
The permanent magnet clutch of this fixing air gap is normally only used for loading the little occasion of change.If being applied to load
Power is big, the big occasion of shock loading, and which has wretched insufficiency：
1. magnet disk with conductor dish gap it cannot be guaranteed that, easily collide.Due to motor bearings and decelerator bearing have certain
End-play, therefore, motor shaft and reducer shaft have certain axial movement value.Permanent magnet clutch and motor and decelerator group
During dress, it is difficult to ensure that the air gap of conductor disc both sides is equal, when making operation, the vertical repulsive force of conductor disc both sides is unequal, so as to electricity
Machine and decelerator bearing produce additional axial force, when motor shaft and reducer shaft axial float are excessive, easily make conductor disc and magnet
Disk is contacted, friction damage when causing both to operate；Particularly when motor and decelerator bearing damage, motor shaft or reducer shaft
Play, directly results in conductor disc and magnet disk contact, friction damage, scraps whole shaft coupling.
2. permanent magnetism body disc is unadjustable with conductor dish gap, when larger shock loading is run into, permanent magnetism body disc and conductor
Disk slippage increases, and although transmission torque has reduced, but can not unload completely, and this situation persistently occurs, and permanent magnet clutch will
Heating is serious, relies solely on a small amount of fin radiating of motor side and load-side（Power is bigger, generates heat more serious, and fin
But do not increase）, heating problem far can not be resolved, and will so cause permanent magnetism temperature to raise until demagnetizing, most
Whole permanent magnet clutch is scrapped.
3. the patent no stationary parts, it is impossible to which cooling system is set, heating problem solution when also not providing high-power transmission
Decision-making is omited and method, it is impossible to for Large-power Driving System.
4. its innovative point is had with document [Formal design optimization of PM drive couplings]
Identical part.
And instant invention overcomes disadvantages mentioned above：
1. except input side permanent magnetism body disc is fixedly connected with spline housing, remaining permanent magnetism body disc is mutually independent with conductor disc, permanent magnetism
Body disc relies on spline connection on spline housing, and conductor disc relies on spline connection on output spline, and conductor disc can be in spline
On axle slidably；When static, conductor disc makes conductor disc not contact with magnet disk with the repulsion between magnetic piece that repels of both sides；Fortune
When dynamic, between conductor disc and magnet disk, there is slippage, there is axial force between the two, it can be ensured that conductor disc will not with magnet disk
Contact, and ensure that automatically the air gap of conductor disc both sides is equal, according to electromagnetic induction principle, it is being less than or equal to maximum load torque
When running under operating mode, between permanent magnetism body disc and conductor disc, gap is constant, the load torque needed for transmission；During overload, load torque
The torque capacity that will can transmit more than permanent magnet clutch, then between permanent magnetism body disc and conductor disc, repulsion increases sharply, more than magnetic
Gravitation between body disc, the gap between magnet disk, between magnet disk and conductor disc becomes rapidly big（Magnet disk can be divided with conductor disc
Do not slide on spline housing and splined shaft）, then permanent magnet clutch transmission torque diminishes rapidly, thus motor load also diminishes, will
Motor and load " disengagement ", so as to protect transmission component, it is achieved that overload protection.
2. effectively radiate to realize high-power permanent magnet shaft coupling, the device employs cooling water active cycle radiating side
Formula, it is ensured that permanent magnetism temperature is unlikely to too high and demagnetizes, it is achieved that the reliability service of permanent magnet clutch.
（2）Patent 201310013057.0（A kind of less permanent magnet eddy current coupling disk of disc type time-lag effect）
Which is innovated disk and adopts inside and outside two circles arrangement, and inside and outside circle magnetic pole is conversely, and respectively enclose magnetic pole also opposed, this arrangement
Permanent magnet be mainly used in improve transmission torque ability.
The present invention is all to arrange some piece permanent magnets with conductor disc near internal diameter circumference in each permanent magnetism body disc, often circle arrangement
Permanent magnet magnetic pole all same, magnet disk and conductor disc just to permanent magnet magnetic pole identical, the permanent magnet master of this arrangement
Play repulsive force effect, it is ensured that permanent magnetism body disc is never contacted with conductor disc.
（3）Patent 201510981250.2（A kind of permanent-magnet eddy current transmission coupling）
The innovation shaft coupling belongs to radial flux permanent magnet eddy current coupling, the restricted occasion of inapplicable radial dimension.
And the invention belongs to axial flux permanent magnet distance-limiting type eddy-current coupling, both purpose differences, principle is also different.
Content of the invention
The present invention is in order to be able to using shaft coupling come the transmitting torque of limiting motor and drive system, it is ensured that actuated element is exempted from
Be hit overload, it is ensured that main process equipment normally runs, and then provides a kind of high-power distance-limiting type permanent-magnet eddy current shaft coupling of multi-disc type
Device.
The present invention is adopted the following technical scheme that：
A kind of high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type, including being input into axle sleeve, transition connecting disc, inside left's shell, magnet
Disk, spline housing, conductor disc, output spline and support housing, the magnet disk includes input side magnet disk, outlet side magnet disk
With some center magnet disks, the total quantity of magnet disk one more than conductor disc quantity, the input side magnet disk, center magnet
Disk, outlet side magnet disk and conductor disc are stacked alternately composition multi-disc type structure, each center magnet disk, outlet side magnet disk and conductor
Disk all can be slid axially along splined shaft.Wherein, center magnet disk quantity and conductor disc quantity can need to increase according to power.
The input side magnet disk is fastenedly connected with transition connecting disc, inside left's shell, spline housing, each center magnet disk and output
Side magnet disk is connected with spline housing by spline, input side magnet disk, center magnet disk, outlet side magnet disk, transition connecting disc,
On the right side of inside left's shell, spline housing and spline housing, end plate constitutes the power rotor of connection motor shaft；Conductor disc is by spline and output flower
Key axle connects and composes the driven rotor of connection reducer input shaft, and power rotor and driven rotor are placed in supporting shell body, are used for
Support the weight of rotor.
The center magnet disk includes that permanent magnet keeps disk, permanent magnet and small magnet, and permanent magnet is kept near external diameter on disk
The even-even permanent magnet for inlaying that N, S pole is alternately arranged is evenly distributed, permanent magnet keeps disk both sides（That is two axial ends face）Close
Inner radius are evenly distributed inlays some magnetic pole identical small magnets, between the arc length at small magnet is more than between two small magnets
Gap arc length；Described input side magnet disk and outlet side magnet disk have the composition structure of center magnet disk（That is input side magnet
Disk is identical with the composition structure of center magnet disk with outlet side magnet disk）, except that input side magnet disk and outlet side magnetic
Body disc only uniformly inlays small magnet in the side near center magnet disk, and another side is close to be fixed with backboard, for converging
Magnetic field, it is ensured that the closure of flux circuit；Permanent magnet on the adjacent magnets disk axially one by one just to and magnetic pole each other conversely, using
In formation axial magnetic flux loop.
The conductor disc includes that conductor plate keeps disk, small magnet and conductor plate, and conductor plate keeps the two sides of disk and conductor
Plate is fixed, and conductor plate keeps the both sides inner ring circumference of disk uniformly to inlay some magnetic pole identical small magnets；Each magnet disk
On small magnet and adjacent conductor disk on small magnet axially one by one just to and magnetic pole is identical each other, make magnet disk with conductor disc phase
Mutually repel and do not contact.
The conductor plate keeps the low permeability magnetic material that disk adopts permeability close to air（As rustless steel, aluminum, copper alloy,
But intensity requirement should be met）Make, conductor plate is very high using conductivity and permeability is made close to the pure copper material of air.
The permanent magnet of the input side magnet disk and outlet side magnet disk keeps the disk back side to be close to the backboard that connects using leading
Magnetic rate is very high and the low-down mild steel of conductivity or soft magnetic materials are made.
In addition to input side magnet disk, all magnet disk and all can slide axially along spline housing, all conductor disc all can be along flower
Key axle slides axially, always to guarantee to leave gap between conductor disc and magnet disk, will not contact, no matter input axle sleeve and output
Axle whether there is axial motion.When equipment is static, small magnet is relied on to keep conductor disc not contact with magnet disk, operation process
In, ensure that the two will not contact by the axial force between conductor disc and magnet disk.
The shaft coupling outlet side is provided with the water inlet pipe with spline housing inner space, and input side is provided with inside left's shell inner chamber even
Logical outlet pipe.
On the right side of the spline housing, end plate is provided with the axial direction for limiting outlet side magnet disk extreme position in axial sliding
Stop screw.
The assemble method of the shaft coupling is as follows：
When shaft coupling is not with motor connection, the transition connecting disc on shaft coupling power rotor is linked as one by screw with housing is supported
Body；
When shaft coupling is with motor connection, first input axle sleeve is connected with motor input shaft, then input axle sleeve is connected with transition
Disk is docked, and with screw fastening electric machine casing flange and support shell flange, subsequently pulls down all transition connecting discs and supporting shell
The attachment screw of body, and axle sleeve and transition connecting disc mode connects for screw will be input into；Finally by aforementioned motor, propping up containing rotor portion
Support housing is docked with reducer input shaft, and the fixing connecting bolt for supporting housing and speed reducer housing.
The concrete control process of shaft coupling is：
After starting motor, motor shaft and magnet disk raising speed, conductor disc and magnet disk noncontact, conductor disc and magnet disk exist and turn
Difference, the intrinsic permanent magnetic field between conductor plate cutting magnet disk in conductor disc, according to the law of electromagnetic induction, in conductor plate, form sensing
Vortex flow, produce induced field, and with permanent magnetism field interactions, hinder magnet disk rotation, conductor disc under the driving of magnet disk,
Its rotating speed rapid increase, until keep relatively low slip lower band dynamic load stable operation with magnet disk；Then in this course, magnet
Repulsion is produced between disk and conductor disc, but as both slips are relatively low, thus its repulsion is less than the gravitation between magnet disk, each magnetic
Body disc is mutually compressed, i.e., the gap minimum between magnet disk, and now shaft coupling transmits running status in efficient moment of torsion；Work as load
During increase, conductor disc rotating speed declines, and due to the invariablenes turning speed of magnet disk, in this course, magnet disk is added with conductor disc slip
Greatly, therefore repulsion be also gradually increased between the two, when the gravitation between repulsion between the two is more than magnet disk, magnet disk with lead
Body disc slides axially, and both gaps increase, and vortex induction magnetic field is declined with the interaction force of permanent magnetic field, and transmitting torque is also therefore
And reduce, motor and decelerator " are disengaged ", has been automatically obtained overload protection.Slide axially process in magnet disk and conductor disc
In, outlet side magnet disk contacts axial stop screw at first, and the gap between conductor disc and outlet side magnet disk reaches maximum, this
When, shaft coupling transmitting torque minimum, far smaller than Rated motor moment of torsion, is effectively protected actuated element and damages because of overload.
In drive system running, cooling water is entered from the water inlet of shaft coupling outlet side, successively from each magnet disk with
Gap between conductor disc is flow through, and finally enters inside left's shell inner chamber, and hot water is discharged from the outlet of shaft coupling input side, it is ensured that
Shaft coupling will not be demagnetized because heating seriously causes permanent magnet high temperature in transmitting large torque operation.
The present invention has the advantages that：
（1）By increasing the quantity of magnet disk and conductor disc, to improve the transmission power of permanent magnet eddy current coupling so as to be suitable for
In the restricted high-power transmission occasion of radial space.（2）By arranging spline housing and splined shaft and repelling small magnet, without the need for peace
Dress bearing is positioned to conductor disc and magnet disk, it is possible to is ensured automatically the gap between conductor disc and magnet disk, is effectively prevented magnetic
The collision of body disc and conductor disc and abrasion.（3）Start moment, shaft coupling principal and subordinate end slippage is 0, thus empty load of motor startup.（4）
During drive system overload, between conductor disc and magnet disk, gap quickly can increase, and make motor fast discharging, it is achieved that actuated element
Effective overload protection.（5）After drive system overload protection, as long as stop motor can resetting, can open again after fixing a breakdown
Move and manually need not participate in.（6）During normal operation, motor is connected with decelerator noncontact, can effectively reduce the fluctuation of load pair
The impact of motor.（7）When being applied to the same load system of multi-motor driving, achievable multimachine driving load equilibrium.（8）Magnet disk
With conductor disc noncontact transmitting torque, internal bearing-free, never wornout, once put into, lifelong be benefited.
Description of the drawings
Fig. 1 is the assembling schematic diagram of apparatus of the present invention.
Fig. 2 is one group of conductor disc and magnet disk assembling side elevation.
Fig. 3 is the distribution schematic diagram of permanent magnet and small magnet in magnet disk.
Fig. 4 is the distribution schematic diagram of small magnet in conductor disc.
In figure：1- input axle sleeve, 2- transition connecting disc, 3- inside left's shell, 4- input side magnet disk, 5- spline housing, 6- conductor
Disk, 7- center magnet disk, 8- output spline, 9- outlet side magnet disk, 10- support housing, 11- axial limiting screw, 12- spiral shell
Nail, 14- conductor plate keep disk, 15- tie-plate, 16- small magnet, 17- conductor plate, 18- permanent magnet to keep disk, 19- permanent magnet.
Specific embodiment
In conjunction with accompanying drawing, the specific embodiment of the present invention is described further：
The high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type as shown in Figure 1, including being input into axle sleeve, transition connecting disc, inside left
Shell, spline housing, input side magnet disk, several center magnet disks, outlet side magnet disk, several conductor disc, output spline, axial direction
Stop screw, support housing etc., the multi-disc type structure refers to that several magnet disk are stacked alternately with conductor disc, composition multi-disc type knot
Structure, can design the quantity of magnet disk and conductor disc according to power demand, by groups such as magnet disk, spline housing, inside left's shell, right side end plates
The power rotor for becoming is connected with motor shaft；The driven rotor being made up of conductor disc, output spline etc. and reducer input shaft are even
Connect.Except input side magnet disk, the polydisc component of remaining magnet disk and conductor disc composition can be respectively in spline housing and output spline
Upper slip and do not contact with each other.Magnet disk is N number of altogether, and input side magnet disk is fastenedly connected with inside left's shell and spline housing, center magnet
Disk, outlet side magnet disk are connected with the spline housing with internal spline by spline, can be slid axially along spline housing, on the spline housing right side
In side end panel, stop screw is set, the ultimate range that magnet disk is moved with conductor disc can be adjusted.Conductor disc is common N-1, each
Conductor disc is placed between each two magnet disk, is connected with the output spline with external splines by spline, can be along output spline
Axle slides axially.The conductor disc small magnet adjacent one another are with magnet disk has certain repulsion, to ensure magnet disk with conductor disc
Do not contact.
As shown in Figure 2,3, 4, center magnet disk includes that permanent magnet keeps disk, permanent magnet, small magnet, center magnet disk inner ring
Two sides circumference uniformly inlay magnetic pole identical small magnet, input side magnet disk, outlet side magnet disk are only led in neighbouring
Body disc side inner ring circumference uniformly inlays magnetic pole identical small magnet（Face conductor disc）.
Conductor disc includes that conductor keeps disk, conductor plate, small magnet and tie-plate, and the two sides circumference of conductor disc inner ring is uniform
Magnetic pole identical small magnet is inlayed, conductor plate is close to be fixed on the two sides that conductor keeps disk, the tie-plate with internal spline
Disk is kept to be close to connection with conductor.Small magnet on the magnet disk two sides adjacent with conductor disc, axially just to and magnetic pole is identical.
Each magnet disk uniformly inlays the even-even permanent magnet that N, S pole is alternately arranged along its circumference, the permanent magnet axle in each magnet disk
To just to and magnetic pole is contrary.
It is non-magnet material that permanent magnet keeps disk, and each magnet disk is alternately arranged along its circumferentially distributed N pole, S pole of inlaying
Even-even permanent magnet, the permanent magnet axial location in each magnet disk is just right, and magnetic pole is conversely, except input side magnet disk and inside left
Outside shell and spline housing are fastenedly connected, remaining magnet disk relies on spline to be connected with the spline housing with internal spline, can be along spline housing axle
To slip, and axial limiting screw is set on end plate on the right side of spline housing；Several conductor disc are by spline and with external splines
Output spline connects, and each conductor disc is placed between each two magnet disk, respectively in magnet disk with conductor disc near inner-diameter end
Face is circumferentially distributed to inlay small magnet, and its axially just right and adjacent one another are small magnet magnetic pole is identical so that have each other certain
Repulsion, to ensure that magnet disk do not contacted with conductor disc, support and be connected with motor support flange on the left of housing, right side with subtract
Fast device casing input end flanges connection, to support motor weight.
Because the left and right outer disk of multi-disc type structure is magnet disk（Input and outlet side magnet disk）, when static, each magnet disk exists
Mutually compress under magnetic field of permanent magnet graviational interaction, each conductor disc is placed between each two magnet disk, by high conductivity and low lead
Magnetic material constitute, can between magnet disk axial float, will not with magnet disk produce gravitation, motor shaft, reducer shaft axial direction
Play will not change the air gap between magnet disk and conductor disc.The relative repulsion of polarity is provided with magnet disk and conductor disc
Small magnet, makes the presence of certain repulsion between magnet disk and conductor disc, due to no gravitation between magnet disk and conductor disc, even if equipment
Also can guarantee that when static that conductor disc is not contacted with magnet disk, it is ensured that low slippage lower magnet disk does not come in contact abrasion with conductor disc.
When the shaft coupling is not with motor connection, the transition connecting disc on its power rotor is connected with housing is supported by screw
It is integrated, to prevent power rotor component sagging.When the shaft coupling is with motor connection, first input axle sleeve is connected with motor shaft
Connect, then input axle sleeve is docked with transition connecting disc, and electric machine casing flange is fastened with screw and support shell flange, subsequently
Pull down all transition connecting discs and the attachment screw of housing is supported, and axle sleeve and transition connecting disc mode connects for screw will be input into.Most
Afterwards, by aforementioned motor-support housing（Containing rotor portion）Dock with reducer input shaft, and fixing support housing and decelerator
The connecting bolt of shell.
Housing transfixion is supported, coolant intake is set on the right side of which, successively from the seam between each magnet disk with conductor disc
Clearance flow mistake, is finally entered inside left's shell, discharges hot water by outlet.
Shaft coupling operation principle is：After starting motor, motor shaft and magnet disk moment raising speed, conductor disc is non-with magnet disk to be connect
Touch, both have slip, the intrinsic permanent magnetic field between conductor plate cutting magnet disk in conductor disc, according to the law of electromagnetic induction, lead
Body plate surface formed inducing eddy-current, produce induced field, and with permanent magnetism field interactions, hinder magnet disk rotation, conductor disc
Under the driving of magnet disk, its rotating speed rapid increase, until keep relatively low slip lower band dynamic load stable operation with magnet disk；?
During this, repulsion between magnet disk and conductor disc, is produced, but as both slips are relatively low, thus its repulsion is less than magnet disk
Between gravitation, each magnet disk mutually compresses, i.e., the gap minimum between magnet disk, and now shaft coupling is in efficient moment of torsion transmission
Running status；When the load increases, conductor disc rotating speed declines, due to the invariablenes turning speed of magnet disk, in this course, magnet disk
Increase with conductor disc slip, therefore repulsion be also gradually increased between the two, when between the two, repulsion is more than drawing between magnet disk
During power, magnet disk is slid axially with conductor disc, and both gaps increase, under vortex induction magnetic field and the interaction force of permanent magnetic field
Drop, therefore transmitting torque also reduces, and motor " is disengaged " with decelerator, has been automatically obtained overload protection.Magnet disk with lead
During body disc slides axially, outlet side magnet disk contacts axial stop screw at first, between conductor disc and outlet side magnet disk
Gap reach maximum, now, shaft coupling transmitting torque minimum, far smaller than Rated motor moment of torsion, is effectively protected transmission
Element is damaged because of overload.
In drive system running, cooling water is entered from the water inlet of shaft coupling outlet side, successively from each magnet disk with
Gap between conductor disc is flow through, and finally enters inside left's shell inner chamber, and hot water is discharged from the outlet of shaft coupling input side, it is ensured that
Shaft coupling will not be demagnetized because heating seriously causes permanent magnet high temperature in transmitting large torque operation.
The present invention adopts multi-disc type structure, can not increase permanent magnetic transmission device radial structure size, can just greatly improve
Permanent magnet transmission power, the structure can be widely applied to radial space and be limited, and the high-power transmission occasion of axial space affluence.
Do not make specified otherwise component etc. in the present invention and prior art is, the foregoing is only the preferable enforcement of the present invention
Example, in order to not limit the present invention, all any modification, equivalent substitution and improvement that is made within the spirit and principles in the present invention
Deng should be included within the scope of the present invention.
Claims (9)
1. the high-power distance-limiting type permanent magnet eddy current coupling of a kind of multi-disc type, including being input into axle sleeve（1）, transition connecting disc（2）, inside left
Shell（3）, magnet disk, spline housing（5）, conductor disc（6）, output spline（8）With support housing（10）, it is characterised in that：Described
Magnet disk includes input side magnet disk（4）, outlet side magnet disk（9）With some center magnet disks（7）, the total quantity ratio of magnet disk
Conductor disc（6）Quantity is many one, the input side magnet disk（4）, center magnet disk（7）, outlet side magnet disk（9）With conductor disc
（6）It is stacked alternately composition multi-disc type structure, each center magnet disk（7）, outlet side magnet disk（9）And conductor disc（6）All can be along flower
Key axle（8）Slide axially；
The input side magnet disk（4）With transition connecting disc（2）, inside left's shell（3）, spline housing（5）It is fastenedly connected, each center magnet
Disk（7）With outlet side magnet disk（9）By spline and spline housing（5）Connection, input side magnet disk（4）, center magnet disk（7）、
Outlet side magnet disk（9）, transition connecting disc（2）, inside left's shell（3）, spline housing（5）And end plate constitutes connection motor on the right side of spline housing
The power rotor of axle；Conductor disc（6）By spline and output spline（8）Connect and compose driven turn of connection reducer input shaft
Son, power rotor and driven rotor are placed in support housing（10）Interior.
2. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 1, it is characterised in that：The centre
Magnet disk（7）Disk is kept including permanent magnet（18）, permanent magnet（19）And small magnet（16）, permanent magnet holding disk（18）Upper close outer
Footpath is evenly distributed the even-even permanent magnet for inlaying that N, S pole is alternately arranged（19）, permanent magnet holding disk（18）Both sides are near interior
Footpath is evenly distributed inlays some magnetic pole identical small magnets（16）, small magnet（16）The arc length at place is more than between two small magnets
Gap arc length；Described input side magnet disk（4）With outlet side magnet disk（9）With center magnet disk（7）Composition structure phase
With except that input side magnet disk（4）With outlet side magnet disk（9）Only near center magnet disk（7）Side uniform
Inlay small magnet（16）, another side is close to be fixed with for converging magnetic field, it is ensured that the backboard of the closure of flux circuit；Described
Permanent magnet on adjacent magnets disk（19）Axially one by one just to and magnetic pole each other conversely, for forming axial magnetic flux loop.
3. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 2, it is characterised in that：The conductor
Disk（6）Disk is kept including conductor plate（14）, small magnet（16）And conductor plate（17）, conductor plate holding disk（14）Two sides with lead
Body plate（17）Fixing, conductor plate keeps disk（14）Both sides inner rings circumference uniformly inlay some magnetic pole identical small magnets
（16）；Small magnet in each magnet disk（16）With adjacent conductor disk（6）On small magnet（16）Axially one by one just to and magnetic
Pole is identical each other, makes that magnet disk is mutually exclusive with conductor disc not to be contacted.
4. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 3, it is characterised in that：The conductor
Plate keeps disk（14）Made close to the low permeability magnetic material of air using permeability, conductor plate（17）The magnetic conduction using conductivity height
Rate is made close to the pure copper material of air.
5. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 4, it is characterised in that：The input
Side magnet disk（4）With outlet side magnet disk（9）Permanent magnet keep disk（18）The backboard that the back side is close to connect adopts high permeability
Mild steel or soft magnetic materials make.
6. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 5, it is characterised in that：The shaft coupling
Device outlet side is provided with and spline housing（5）The water inlet pipe of inner space, input side is provided with and inside left's shell（3）The water outlet of inner space
Pipe.
7. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 6, it is characterised in that：The spline
Set（5）Right side end plate is provided with for limiting outlet side magnet disk（9）The axial limiting screw of extreme position in axial sliding
（11）.
8. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 7, it is characterised in that the shaft coupling
The assemble method of device is as follows：
When shaft coupling is not with motor connection, the transition connecting disc on shaft coupling power rotor（2）By screw and support housing
（10）It is connected as a single entity；
When shaft coupling is with motor connection, axle sleeve will be first input into（1）It is connected with motor input shaft, then will be input into axle sleeve（1）With mistake
Cross terminal pad（2）Docking, and fasten electric machine casing flange with screw and support housing（10）Flange, subsequently pulls down all transition even
Flange（2）With support housing（10）Attachment screw（12）, and axle sleeve will be input into（1）With transition connecting disc（2）Use mode connects for screw；
Finally aforementioned motor, the support housing containing rotor portion are docked with reducer input shaft, and fixing support housing and decelerator
The connecting bolt of shell.
9. the high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type according to claim 8, it is characterised in that shaft coupling
Specifically control process is：
After starting motor, motor shaft and magnet disk raising speed, conductor disc and magnet disk noncontact, conductor disc and magnet disk exist and turn
Difference, the intrinsic permanent magnetic field between conductor plate cutting magnet disk in conductor disc, according to the law of electromagnetic induction, in conductor plate, form sensing
Vortex flow, produce induced field, and with permanent magnetism field interactions, hinder magnet disk rotation, conductor disc under the driving of magnet disk,
Its rotating speed rapid increase, band dynamic load rotation；Repulsion is then produced between magnet disk and conductor disc, but less than drawing between magnet disk
Power, each magnet disk is mutually compressed, and the gap minimum between magnet disk, and now shaft coupling is in efficient moment of torsion transmission operation shape
State；When the load increases, conductor disc rotating speed declines, and the slip between magnet disk increases, and conductor disc is scolded between the two with magnet disk
Power is gradually increased, and when the gravitation between repulsion between the two is more than magnet disk, magnet disk is slid axially with conductor disc, magnet disk with
Conductor dish gap increases, and transmitting torque declines, and implements automatically overload protection, and outlet side magnet disk contacts stop screw at first, leads
Gap between body disc and outlet side magnet disk reaches maximum, now, shaft coupling transmitting torque minimum, far smaller than Rated motor
Moment of torsion, is effectively protected actuated element and damages because of overload；
In drive system running, cooling water is entered from support housing side, successively from the seam between each magnet disk with conductor disc
Clearance flow mistake, finally enters inside left's shell, hot water is discharged from outlet, it is ensured that permanent magnet will not be demagnetized because of high temperature.
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| CN201610994974.5A CN106452007B (en) | 2016-11-11 | 2016-11-11 | The high-power distance-limiting type permanent magnet eddy current coupling of multi-disc type |
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| CN106452007B CN106452007B (en) | 2018-11-20 |
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| CN109428461A (en) * | 2017-08-20 | 2019-03-05 | 迈格钠磁动力股份有限公司 | Megawatt-level permanent magnet is vortexed flexible gearing |
| CN116110621A (en) * | 2023-04-13 | 2023-05-12 | 清华大学 | High-temperature gas cooled reactor control rod system and damper |
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| Publication number | Publication date |
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| CN106452007B (en) | 2018-11-20 |
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