CN103401398B - A kind of magnetic coupling - Google Patents
A kind of magnetic coupling Download PDFInfo
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- CN103401398B CN103401398B CN201310340277.4A CN201310340277A CN103401398B CN 103401398 B CN103401398 B CN 103401398B CN 201310340277 A CN201310340277 A CN 201310340277A CN 103401398 B CN103401398 B CN 103401398B
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Abstract
The invention discloses a kind of magnetic coupling, comprise power input shaft, connecting flange, permanent-magnetic outer rotor assembly, cage modle internal rotor, power output shaft and mechanical adjustable speed drive; Described permanent-magnetic outer rotor assembly adopts hollow cup-shaped structure, is sleeved on the outside of cage modle internal rotor, is realized the transmission of moment of torsion by air-gap field coupling therebetween; Mechanical adjustable speed drive can utilize the axial air-gap area between lever principle change permanent-magnetic outer rotor assembly and cage modle internal rotor, realizes the stepless speed regulation to load speed; The present invention gives the magnetic pole logarithm method for designing of permanent-magnetic outer rotor assembly according to torque ripple minimum principle, reduces the moment of inertia of yoke thickness and coupler.Described cage modle internal rotor can adopt the same or analogous structure unshakable in one's determination with conventional motors cage rotor.Magnetic coupling of the present invention both coaxially can be connected with load, also can be used as belt wheel adapter, supported the use with belt wheel.
Description
Technical field
The present invention relates to a kind of dynamic power machine drive technology, particularly a kind of magnetic coupling.
Background technology
So-called advanced energy saving transmission, refers to the kind of drive substituting backward power consumption by the advanced energy-conservation kind of drive.Wherein magnetic coupling transmission is because having light-load starting, overload protection, slowing down impact, isolating the excellent functions such as torsional oscillation, so be applied in large inertia, difficult startup mechanically, can change the backward kind of drive of " low load with strong power ", obvious energy conservation.
V belt translation is a kind of important machine driving form, is also the core coupling component of electromechanical equipment, and its maximum feature is that structure is simple, and replacing facilitates and can free speed change.
According to statistics, power transmission form more than 50% between domestic and international prime mover and working machine is V belt translation, if the efficiency of V belt translation can be made to improve one of percentage, although numeral is little, to a factory or an area and even the whole nation, the total amount of energy savings is still very considerable.
If magnetic coupling is used for torque as belt wheel adapter and rotating speed has in the V belt translation of fluctuation, conservative estimation can energy savings more than 10%, and significantly can improve useful life and the reliability of conveyer belt, become very competitive power transmission functional part.
Existing more patent is studied magnetic coupling at present, with United States Patent (USP) (PatentNo.:US6,682,430B2) be the permanent-magnet disk eddy current magnetic coupling of representative and the telescopic eddy current magnetic coupling of permanent magnetism that is representative with Chinese patent 20101019811.5, all realize by the torque transfer of motor to load by the air gap between copper conductor and permanent magnet, its kind of drive is induction asynchronous system, and slippage is l% ~ 4%.
The permanent-magnet eddy current magnetic coupling of quovis modo, because slippage is large, produces comparatively maelstrom in copper dish or copper sheathing, and cause the heat waste of coupler system large, efficiency is low, is not suitable for powerful Mechanical & Electrical Transmission equipment.
The magneto asynchronous magnetic couplings being representative with Chinese patent 201110219054.3, Chinese patent 200910024449.0 and Chinese patent 200420025250.2 or magnetic drive device, owing to adopting the cage rotor of asynchronous machine form, solve the heating problem of above-mentioned copper rotor preferably.But this kind of patented technology is mainly for the production of in the dead-tight transmission device of environmental requirement or equipment, separation sleeve has been installed additional between p-m rotor and cage rotor, increase the void dimension between p-m rotor and cage rotor, the increase of air gap, causes the aerial loss of magnetomotive force to increase, decreases the magnetic flux density of air-gap field, for the permanent magnet of same volume, its energy conversion efficiency is low, the moment of torsion that can transmit reduces, and the loss of permanent magnet magnetic potential is large, and execution efficiency is low.
The magneto asynchronous magnetic transmission device being representative with United States Patent (USP) (Pub.No.:US2010/0277021A1), also use the cage rotor of asynchronous machine form, without separation sleeve between p-m rotor and cage rotor, therefore its air gap flux density is large, leakage field is little, execution efficiency is also higher, but the asychronous dynamo cage rotor adopted is nonstandard structure, need to redesign, not only the design cycle is long, but also need again to customize technique, mould etc., add manufacturing cost.
Summary of the invention
For solving the problems referred to above that prior art exists, the present invention designs a kind of magnetic coupling of drag cup structure, has moment of inertia and little, the rotor weight of generating heat is light, it is level and smooth to rotate, operational efficiency is high and noise is little etc. feature.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of magnetic coupling, comprises power input shaft, connecting flange, permanent-magnetic outer rotor assembly, cage modle internal rotor, power output shaft and mechanical adjustable speed drive; Described permanent-magnetic outer rotor assembly is sleeved on the outside of cage modle internal rotor, there is even air gap therebetween; Described permanent-magnetic outer rotor assembly is connected with power input shaft by the internal spline in connecting flange, and cage modle internal rotor is installed on power output shaft by key connected mode or interference fit, and power output shaft is connected with load by output flange; Mechanical adjustable speed drive is sleeved on connecting flange, utilizes lever principle dragging connecting flange and permanent-magnetic outer rotor assembly to move axially, to regulate the axial air-gap area between permanent-magnetic outer rotor assembly and cage modle internal rotor;
In described permanent-magnetic outer rotor assembly, permanent magnet can adopt radial layout or tangential layout two kinds of modes; When adopting radial layout type, permanent-magnetic outer rotor assembly comprises yoke and permanent magnet A and permanent magnet B; Permanent magnet A and permanent magnet B is tile-type structure, and its arc-shaped surface is inside, and magnetizing direction is contrary, and along the even circumferential layout of yoke, magnetic pole is along the circumferential direction staggered, and utilizes each permanent magnet side clearance of curable cohesive material uniform filling; When adopting tangential layout type, permanent-magnetic outer rotor assembly comprises yoke, permanent magnet, interior magnetic isolation plate, outer magnetic isolation plate and locating piece, described permanent magnet is rectangular structure, circumferentially uniform layout, pole orientation circumferentially tangential direction, adjacent permanent magnet install time pole orientation relative; Described permanent magnet locating piece is the sector structure of permeability magnetic material, and is fixed on yoke inner surface with welding manner;
The cylindrical suit aluminum thermal fin of described permanent-magnetic outer rotor assembly, in order to heat radiation.
In described permanent-magnetic outer rotor assembly, the magnetic pole logarithm p of permanent magnet presses formula
Choose, meeting f
cunder the prerequisite of minimum value, p chooses maximum as far as possible; In above formula, f
cfor torque ripple factor; P is permanent magnet pole logarithm; n
sfor cage-type rotor sliver number; N
cfor p and n
sleast common multiple.F
cchoice criteria be the minimum value meeting above formula;
Described mechanical adjustable speed drive is planar linkage mechanism, comprises dynamical element, supporting bracket, catch bar, briquetting, fork, movable pulley, bearing holder (housing, cover), splined sleeve, connecting rod, rolling bearing, fulcrum bearing; Dynamical element is fixed on the platform base near prime mover or prime mover by supporting bracket, and dynamical element drives catch bar to move vertically; Fork and fulcrum bearing hinged, drive connecting rod motion; Described fork and briquetting utilize bolt to be connected, and fork drives gathering sill; Described movable pulley is connected with the end of catch bar, and in the gathering sill embedded, during catch bar motion, movable pulley rolls along the gathering sill on fork, promotes fork and rotates around the hinged place of fulcrum bearing, drives connecting rod motion; Described connecting rod one end and bearing holder (housing, cover) are hinged and connected, the other end and fork hinged; Bearing holder (housing, cover) is connected by bearing and splined sleeve, and splined sleeve can be driven when connecting rod moves to do axial motion, to change the axial area of magnetic coupling internal magnetic field air gap;
The dynamical element of described mechanical adjustable speed drive can adopt stepping motor or cylinder or hydraulic cylinder, when adopting stepping motor, utilizes ball-screw or worm-and-wheel gear to realize axial motion; Described mechanical adjustable speed drive has manually and automatically controlled two kinds of control modes, manually or automatically controlled control mode realize the Stroke Control of catch bar.
Permanent-magnetic outer rotor assembly of the present invention is connected with prime mover power output shaft by the key in connecting flange B, and is connected with load by the output flange on power output shaft, with adapt to load not needs speed regulate requirement.
The both ends of power input shaft of the present invention and power output shaft adopt front end bearing block and rear end bearing seat supports respectively, to adapt to the longer requirement of axial displacement adjustable range.
Cage modle internal rotor of the present invention is connected with power input shaft by the splined hole of sleeve, permanent-magnetic outer rotor assembly and connecting flange by transmission of torque to belt wheel; Mechanical adjustable speed drive is arranged on the outside of the sleeve in cage modle internal rotor, drives cage modle internal rotor to move axially, to be adapted to belt wheel adapter and to need the requirement of speed governing.
Cage modle internal rotor of the present invention is assemblied on power input shaft by interference mode, by permanent-magnetic outer rotor assembly and mounting flange by transmission of torque to belt wheel, for during during belt wheel adapter and without the need to speed governing.
Power input shaft of the present invention is male splined shaft structure, is set in together by spline joint and mounting flange; Power input shaft endoporus one end is connected with prime mover power output shaft key, and the endoporus other end installs bearing, realizes the radial location with power output shaft.
Power input shaft of the present invention is multidiameter structure, one end is directly connected by key or other connecting mode and prime mover power output shaft, the other end is connected by the sleeve in spline and cage modle internal rotor, utilizes spline joint by transmission of torque to cage modle internal rotor; The cylindrical of described power input shaft is sleeved on bearing; Permanent-magnetic outer rotor assembly is connected by the key of mounting flange and is connected with belt wheel; Mounting flange is sleeved on Bearing outer, for belt wheel adapter and when needing speed governing.
Power input shaft of the present invention is ladder optical axis, and one end is directly connected by key and prime mover power output shaft, and the other end is connected by flat key or interference fit and cage modle internal rotor; Described power input shaft is sleeved on bearing, and is connected by key connecting mode with prime mover power output shaft; During for belt wheel adapter and without the need to speed governing.
Belt wheel of the present invention and connecting flange adopt key connecting mode to be connected, and utilize gland to realize axial restraint, can change the belt wheel of different-diameter according to load behavior.
The cylindrical suit aluminum thermal fin of permanent-magnetic outer rotor assembly of the present invention, in order to heat radiation.
Cage modle internal rotor of the present invention directly adopts the cage rotor of asynchronous machine unshakable in one's determination, and carries out processing and installing sleeve to its endoporus as required; The axial two ends of described cage modle internal rotor respectively have a fan or only have one end to have a fan or two ends all do not have fan; Sleeve is compressed in the endoporus unshakable in one's determination of cage modle internal rotor by key or interference mode.
Magnetic coupling of the present invention, when belt wheel is installed on magnetic coupling output, can adopt rear end bearing seat as support; Belt wheel is contained in power output shaft outside by key adapter sleeve.Mechanical adjustable speed drive is arranged on outside sleeve.
The present invention, compared with existing magnetic coupling or other magnetic drive device or technology, has following outstanding character and remarkable advantage:
1, the magnetic pole logarithm p in permanent-magnetic outer rotor assembly of the present invention presses formula
Choose, give the selection principle of magnetic pole logarithm; In addition, f is being met
cunder the prerequisite of minimum value, p chooses maximum as far as possible, can ensure that yoke thickness is minimum, reduces the moment of inertia of external rotor assembly of the present invention.
2, the moment of inertia due to permanent-magnetic outer rotor assembly of the present invention is little, only needs single-ended bearing to support, and makes system more simply compact.
3, in the present invention, if set J as the moment of inertia of external rotor assembly, B
δfor air gap flux density, mechanical time constant is T
m, then
Because J is very little, and the B of rare earth permanent magnet
δvery large, therefore T
mvery little; In addition, what magnetic coupling of the present invention produced rotating magnetic field is rare-earth permanent magnet, and what produce induced current is the cage rotor of asynchronous machine, and therefore its inductance value L is very little, namely also very little (R is the resistance of cage rotor), therefore its electrical time constant is also very little for L/R.
Because mechanical time constant and electrical time constant are all very little, therefore dynamic property of the present invention is good, can carry out speed regulating control well.
4, the present invention directly adopts the cage rotor of asynchronous machine (or adopting the structure similar to asychronous dynamo cage rotor), and not only reliability is high, whirlpool is damaged little, and remained fan page (all can retain at two ends, also can retain one end).There is the side of fan page to be in the port of mouse cage mobile terminal, significantly improve radiating condition of the present invention.
5, mechanical adjustable speed drive of the present invention is planar linkage mechanism, its force place both can be stepping motor, also can be air pressure or hydraulic means, also can be manually, and force application apparatus is lever construction, namely give very little external force during speed governing and can obtain larger thrust at output, not only energy-conservation, and be conducive to the accurate control of coupler speed governing.
6, existing various magnetic coupling is emerging product, the maturity of its technology and runnability are far away from conventional motors, and the present invention adopts the cage rotor of conventional motors, its design and manufaction have passed through the development of decades, and structure has reached optimum substantially, and therefore the present invention can significantly simplify Analysis of Magnetic Circuit and calculating, shorten the design cycle of product, and can direct volume procurement, with low cost, runnability might as well.
7, when uneasiness of the present invention debugs speed variator, identical with induction type asynchronous magnetic couplings; Stepless time adjustment can be realized after speed regulating device are installed.The present invention, except all properties with magnetic coupling, also can be used as belt wheel adapter, is installed together with belt wheel, and for having automatic regulating load torque and rotating speed functions during belt driver, and belt wheel is conveniently replaced.
Accompanying drawing explanation
The present invention has 12, accompanying drawing, wherein:
Fig. 1 is adjustable-speed magnetic coupling of the present invention assembling schematic diagram;
Fig. 2 is that magnetic coupling of the present invention need not assemble schematic diagram during speed governing;
Fig. 3 be adjustable-speed magnetic coupling axial distance of the present invention longer time assembling schematic diagram;
Fig. 4 is that adjustable-speed magnetic coupling of the present invention is for assembling schematic diagram during belt wheel adapter;
Fig. 5 is that the present invention is for belt wheel adapter and without the need to assembling schematic diagram during speed governing;
Fig. 6 is that permanent magnet adopts permanent-magnetic outer rotor during radial layout to assemble schematic diagram;
Fig. 7 is that permanent magnet adopts permanent-magnetic outer rotor during tangential layout to assemble schematic diagram;
Fig. 8 is the cage modle internal rotor assembling schematic diagram of band spline housing;
Fig. 9 is the assembling schematic diagram that mechanical adjustable speed drive is fixed on prime mover;
Figure 10 is governor system control structure diagram;
Figure 11 is that permanent-magnetic outer rotor assembly can move axially and mechanical adjustable speed drive is fixed on schematic diagram of mechanism near prime mover on platform base;
Figure 12 is that cage modle internal rotor can move axially and mechanical adjustable speed drive is fixed on schematic diagram of mechanism near prime mover on platform base;
Figure 13 is that magnetic coupling of the present invention speed governing and belt wheel need not be arranged on the assembling schematic diagram of output;
Figure 14 is adjustable-speed magnetic coupling of the present invention and belt wheel is arranged on the assembling schematic diagram of output.
In figure: 1, power input shaft, 2, connecting flange, 3, permanent-magnetic outer rotor assembly, 4, cage modle internal rotor, 5, power output shaft, 6, mechanical adjustable speed drive, 7, prime mover power output shaft, 8, bearing, 9, fin, 10, output flange, 11, fan A, 12, front end bearing block, 13, rear end bearing seat, 14, sleeve, 15, belt wheel, 16, front end housing, 17, yoke, 18, permanent magnet A, 19, permanent magnet B, 20, curable cohesive material, 21, permanent magnet, 22, interior magnetic isolation plate, 23, outer magnetic isolation plate, 24, locating piece, 25, fan B, 26, dynamical element, 27, connecting plate, 28, supporting bracket, 29, catch bar, 30, briquetting, 31, fork, 32, movable pulley, 33, bearing holder (housing, cover), 34, splined sleeve, 35, connecting rod, 36, rolling bearing, 37, fulcrum bearing, 38, prime mover, 39, load, 40, magnetic coupling, 41, sample circuit, 42, central processing unit, 43, control and display operating platform.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Basic structure of the present invention is as shown in Figure 1: prime mover power output shaft 7 connects the power input shaft 1 power torque being passed to magnetic coupling by key, power input shaft 1 is external splines type structure, spline joint is utilized power torque to be passed to connecting flange 2 and permanent-magnetic outer rotor assembly 3, permanent-magnetic outer rotor assembly 3 and prime mover power output shaft 7 synchronous axial system.Even air gap is there is between cage modle internal rotor 4 outer surface and permanent-magnetic outer rotor assembly 3 inner surface.Due to the rotation of permanent-magnetic outer rotor assembly 3, rotating magnetic field is produced in air gap, and produce induced current in sliver in cage modle internal rotor 4, Lorentz force in magnetic field is utilized to drive cage modle internal rotor 4 to rotate, and then realize the transmission of torque of permanent-magnetic outer rotor assembly 3 to cage modle internal rotor 4, power output shaft 5 is connected by key or drawing method is connected with cage modle internal rotor 4, and by output flange 10, moment of torsion is passed to load.
For ensureing permanent-magnetic outer rotor assembly 3 and the concentricity of cage modle internal rotor 4 and the uniformity of air-gap field, bearing 8 can be utilized to realize the radial location of power output shaft 5 and power input shaft 1.Connecting flange 2 is driven to axially move with the external splines of permanent-magnetic outer rotor assembly 3 along power input shaft 1, to change air gap contact area by mechanical adjustable speed drive 6.Fin 9 can be set with, to increase the area of dissipation of magnetic coupling in the outside of the sub-assembly 3 of permanent magnetism unofficial biography; Also can retain one end fan A11 of cage rotor, under rotation status, increase the heat-sinking capability of coupler.
Similar to asynchronous motor magnetic field operation principle, due to the magnetic field induction effect of air gap, slip is there is between cage modle internal rotor 4 and permanent-magnetic outer rotor assembly 3, this slip size except with load mutually outside the Pass, also depend on air gap area, namely under the effect of mechanical adjustable speed drive 6, permanent-magnetic outer rotor assembly 3 can be made to axially move, to change the air gap contact area of permanent-magnetic outer rotor assembly 3 and cage modle internal rotor 4, thus regulating rotary extent, control the rotating speed of cage modle internal rotor 4 and power output shaft 5.
As shown in fig. 1, when driving connecting flange 2 and permanent-magnetic outer rotor assembly 3 to run vertically by mechanical adjustable speed drive 6, the air-gap flux contact area of permanent-magnetic outer rotor assembly 3 and cage modle internal rotor 4 can be changed, and then change slip between the two, achieve the stepless speed regulation of power output shaft 5.
In addition, in start-up course, also can by the rea adjusting of air-gap flux to smaller value, after electric motor starting reaches steady operational status, utilize mechanical adjustable speed drive 6 progressively to increase the area of air-gap flux, the light load realizing load starts, and is then progressively increased to the operating state of rated power.
If when load regulates without the need to speed, magnetic coupling structure as shown in Figure 2 can be adopted.Now being connected by key with connecting flange 2 of prime mover power output shaft 7, by transmission of torque to permanent-magnetic outer rotor assembly 3, by air-gap field effect, drive cage modle internal rotor 4 to rotate, and the mode connected by compacting or key by transmission of torque to power output shaft 5.This structure of the present invention does not possess speed-regulating function, be applicable to load detent torque large, and the large operational environment that fluctuates, by the air-gap field effect of magnetic coupling, starting current and the fluctuation of load can be effectively reduced on the impact of current of electric, make motor can obtain larger detent torque, saves energy, and reduce the impact of the fluctuation of load to electrical network, extend motor useful life.
If when magnetic coupling makes its axial length longer because air gap regulates, magnetic coupling structure as shown in Figure 3 can be adopted.Power input shaft 1 is slender axles, and connecting flange 2 and permanent-magnetic outer rotor assembly 3 can do long-distance axial and move along the spline on power input shaft 1, realize large-scale speed governing, and power output shaft 5 and power input shaft 1 utilize bearing 8 to ensure concentricity.Two ends can adopt front end bearing block 12 to support with rear end bearing seat 13.Its mechanical adjustable speed drive 6 can adopt structure as shown in figure 11, and by fork horizontal positioned, position of the fulcrum is parallel with magnetic coupling.
If magnetic coupling is used for belt wheel adapter and when needing speed governing, structure as shown in Figure 4 can be adopted, power input shaft 1 is contained on prime mover power output shaft 7 by key adapter sleeve, the other end by spline form by torque transfer spline sleeve 14, splined sleeve 14 is compressed in cage modle internal rotor 4 endoporus in an interference fit, cage modle internal rotor 4 drives permanent-magnetic outer rotor assembly 3 to rotate by the coupling of air gap, and pass through connecting flange 2 by transmission of torque to belt wheel 15, belt wheel 15 is sleeved on outside connecting flange 2, adopt key connected mode transmitting torque, utilize gland 16 to limit belt wheel 15 to move axially, belt wheel 15 utilizes belt by transmission of torque to load, adopt bearing 8 to locate between connecting flange 2 and power input shaft 1, and rotation status is isolated.Place rear end bearing seat 13 at power input shaft 1 other end to be supported.Gland 16 is dismantled, the requirement different according to gearratio can change belt wheel 15.Mechanical adjustable speed drive 6 can be arranged on splined sleeve 14, and its vertical view as shown in figure 12, by fork effect, drives cage modle internal rotor 4 to axially move, to regulate air gap area.
If when magnetic coupling is for belt wheel adapter and without the need to speed governing, structure as shown in Figure 5 can be adopted, power input shaft 1 is contained on prime mover power output shaft 7 by key adapter sleeve, the other end adopts the method for compacting or key connection by transmission of torque on cage modle internal rotor 4, moment of torsion transmittance process is identical with Fig. 4, can need the belt wheel changing different-diameter according to real work.
In the present invention, in permanent-magnetic outer rotor assembly, the layout type of permanent magnet adopts radial layout or tangential layout two kinds of modes; When adopting radial layout type, as shown in Figure 6, permanent-magnetic outer rotor assembly 3 comprises yoke 17 and permanent magnet A18 and permanent magnet B19; Permanent magnet A18 and permanent magnet B19 is tile-type structure, and its arc-shaped surface is inside, and magnetizing direction is contrary, along the even circumferential layout of yoke 17, be staggered, and utilize the curable each permanent magnet side clearance of cohesive material 20 uniform filling, to form complete permanent magnet internal circular surfaces; When adopting tangential layout type, as shown in Figure 7, permanent-magnetic outer rotor assembly comprises yoke 17, permanent magnet 21, interior magnetic isolation plate 22, outer magnetic isolation plate 23 and locating piece 24, described permanent magnet 21 is rectangular structure, circumferentially uniform layout, the pole orientation of pole orientation circumferentially tangential direction, adjacent permanent magnet is relative; Described permanent magnet locating piece 24 is the sector structure of permeability magnetic material, and is fixed on yoke 17 inner surface with welding manner.
As shown in Figure 8, fan A11 from cage modle inner rotor shaft to two ends and fan B25 all can retain according to heat dispersal situations or all remove or retain one end.
Belt wheel 15 can be arranged on the output of magnetic coupling as shown in figure 13, is connected with power output shaft 5 by key, and belt wheel is changed convenient, but can not realize speed governing.
As shown in figure 14, cage modle internal rotor 4 inside has been set with splined sleeve 14, and power output shaft 5 is external splines structure, and cage modle internal rotor 4 and splined sleeve 14 can axially move along power output shaft 5 under the effect of mechanical adjustable speed drive 6, realize stepless speed regulation.
Mechanical adjustable speed drive of the present invention is as shown in Fig. 9, Figure 11 and Figure 12, adopt lever operation principle, using hydraulic cylinder, cylinder, stepping motor as power executive component 26, be fixed in supporting bracket 28 by connecting plate 27, drive fork 31, with the fraising on fulcrum bearing 37 for centre swinging, and then fork 31 is by connecting rod 35, drag bearing holder (housing, cover) 33, rolling bearing 36 and spline housing 34 axially move.Scroll wheel 32, under the effect of catch bar 29, can slide along the groove on fork 31.The two ends of connecting rod 35 respectively with fork 31 and bearing holder (housing, cover) 33 hinged, free to rotate.Spline housing 34 adopts internal spline structure.
For needing the operational environment automatically regulating magnetic coupling air-gap flux area (i.e. automatic speed regulation), control system as shown in Figure 10 can be adopted, prime mover 38 is with dynamic load 39 rotary work by magnetic coupling 40, required load parameter, as rotating speed, pressure, lift, time etc. change the signal of telecommunication into by sample circuit 41, feed back to central processing unit 42, by central processing unit 42 after computing, control the air-gap flux contact area that mechanical adjustable speed drive 6 changes magnetic coupling, reach the rotating speed of control load 39 and the object of power output.Control to set the inner parameter of central processing unit 42 with display operating platform 43, and can by control feedback parameter with form displays such as charts.
Claims (2)
1. a magnetic coupling, is characterized in that: comprise power input shaft (1), connecting flange (2), permanent-magnetic outer rotor assembly (3), cage modle internal rotor (4), power output shaft (5) and mechanical adjustable speed drive (6); Described permanent-magnetic outer rotor assembly (3) is sleeved on the outside of cage modle internal rotor (4), there is even air gap therebetween; Described permanent-magnetic outer rotor assembly (3) is connected with power input shaft (1) by the internal spline in connecting flange (2), cage modle internal rotor (4) is installed on power output shaft (5) by key connected mode or interference fit, and power output shaft (5) is connected with load (39) by output flange (10); Mechanical adjustable speed drive (6) is sleeved on connecting flange (2), utilize lever principle to drag connecting flange (2) to move axially with permanent-magnetic outer rotor assembly (3), to regulate the axial air-gap area between permanent-magnetic outer rotor assembly (3) and cage modle internal rotor (4);
In described permanent-magnetic outer rotor assembly (3), permanent magnet adopts radial layout or tangential layout two kinds of modes; When adopting radial layout type, permanent-magnetic outer rotor assembly (3) comprises yoke (17) and permanent magnet A (18) and permanent magnet B (19); Permanent magnet A (18) and permanent magnet B (19) are tile-type structure, its arc-shaped surface is inside, and magnetizing direction is contrary, along the even circumferential layout of yoke (17), magnetic pole is along the circumferential direction staggered, and utilizes the curable each permanent magnet side clearance of cohesive material (20) uniform filling; When adopting tangential layout type, permanent-magnetic outer rotor assembly (3) comprises yoke (17), permanent magnet (21), interior magnetic isolation plate (22), outer magnetic isolation plate (23) and locating piece (24), described permanent magnet (21) is rectangular structure, circumferentially uniform layout, pole orientation circumferentially tangential direction, adjacent permanent magnet (21) install time pole orientation relative; The sector structure that described permanent magnet locating piece (24) is permeability magnetic material, and be fixed on yoke (17) inner surface with welding manner;
Cylindrical suit aluminum thermal fin (9) of described permanent-magnetic outer rotor assembly (3), in order to heat radiation;
Described cage modle internal rotor (4) directly adopts the cage rotor of asynchronous machine unshakable in one's determination, and utilizes cage rotor stalk to dispel the heat to the cast aluminium fan at two ends, or only retains the fan at a fan or removal two ends;
In described permanent-magnetic outer rotor assembly (3), the magnetic pole logarithm p of permanent magnet presses formula
Choose, meeting f
cunder the prerequisite of minimum value, p chooses maximum as far as possible; In above formula, f
cfor torque ripple factor; P is permanent magnet pole logarithm; n
sfor cage-type rotor sliver number; N
cfor p and n
sleast common multiple; f
cchoice criteria be the minimum value meeting above formula;
Described mechanical adjustable speed drive (6) is planar linkage mechanism, comprise dynamical element (26), connecting plate (27), supporting bracket (28), catch bar (29), briquetting (30), fork (31), movable pulley (32), bearing holder (housing, cover) (33), splined sleeve (34), connecting rod (35), rolling bearing (36), fulcrum bearing (37); Dynamical element (26) is connected by connecting plate (27) and supporting bracket (28), supporting bracket (28) is fixed on the platform base near prime mover (38) or prime mover (38), and dynamical element (26) drives catch bar (29) to move vertically; Fork (31) is hinged with fulcrum bearing (37), drives connecting rod (35) motion; Described fork (31) utilizes bolt to be connected with briquetting (30), and (31) drive gathering sill to fork; Described movable pulley (32) is connected with the end of catch bar (29), and embed in gathering sill, during catch bar (29) motion, movable pulley (32) rolls along the gathering sill on fork (31), promote fork (31) to rotate around the hinged place of fulcrum bearing (37), drive connecting rod (35) motion; Described connecting rod (35) one end and bearing holder (housing, cover) (33) hinged, the other end and fork (31) hinged; Bearing holder (housing, cover) (33) is connected by bearing and splined sleeve (34), drives splined sleeve (34) to do axial motion, to change the axial area of magnetic coupling air-gap field when connecting rod (35) is mobile; Described splined sleeve (34) is sleeved on connecting flange (2);
The dynamical element (26) of described mechanical adjustable speed drive (6) adopts stepping motor or cylinder or hydraulic cylinder, when adopting stepping motor, utilizes ball-screw or worm-and-wheel gear to realize axial motion;
Described mechanical adjustable speed drive (6) has manually and automatically controlled two kinds of control modes, to realize the Stroke Control of catch bar (29).
2. a kind of magnetic coupling according to claim 1, it is characterized in that: described power input shaft (1) and the both ends of power output shaft (5) adopt front end bearing block (12) and rear end bearing seat (13) to support, to adapt to the longer requirement of axial displacement adjustable range respectively.
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| WO2015184564A1 (en) * | 2014-06-04 | 2015-12-10 | 李启飞 | F-model electric speed regulation disc-type magnetic coupler having ball-screw |
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| EP1154551A2 (en) * | 2000-01-21 | 2001-11-14 | Günther Tillmann Rodenhuis | Dynamoelectric gear |
| CN201577017U (en) * | 2009-11-24 | 2010-09-08 | 南京艾凌节能技术有限公司 | Novel air gap adjusting device of permanent magnet speed regulator |
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| CN203387390U (en) * | 2013-08-06 | 2014-01-08 | 大连交通大学 | Magnetic coupler |
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