CN202334249U - Novel radial magnetic field induction-type asynchronous permanent-magnet coupler - Google Patents
Novel radial magnetic field induction-type asynchronous permanent-magnet coupler Download PDFInfo
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- CN202334249U CN202334249U CN2011203678348U CN201120367834U CN202334249U CN 202334249 U CN202334249 U CN 202334249U CN 2011203678348 U CN2011203678348 U CN 2011203678348U CN 201120367834 U CN201120367834 U CN 201120367834U CN 202334249 U CN202334249 U CN 202334249U
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Abstract
The utility model relates to a novel radial magnetic field induction-type asynchronous permanent-magnet coupler, particularly a transmission shaft coupling and connecting device which can isolate shock load and has the advantages of high efficiency, energy saving and simple structure. The utility model can be widely used in the fields of medium/small motor traction and power transmission. The novel radial magnetic field induction-type asynchronous permanent-magnet coupler is characterized by comprising an inner rotor and an outer rotor, wherein the inner rotor is provided with a squirrel-cage conductor 10, and the outer rotor is provided with 2p outer rotor permanent magnets 8; the inner rotor and the outer rotor are assembled with a front end cover 2, a back end cover 14, a front bearing 4, a rear bearing 13, a flange connection disk 5 and other structural parts to form an integrated overall structure; an air gap exists between the inner rotor and the outer rotor; the inner rotor and the outer rotor are coupled through the radial magnetic field in the air gap; the inner rotor and the outer rotor do not have mechanical contact or friction, and are distributed in a coaxial mode; the outer rotor and the inner rotor asynchronously operate in the same direction; the magnetic field coupling of the outer rotor and the inner rotor is utilized to achieve the goal of buffering or isolating the shock load influence of motor full-load starting; and the transferred mechanical power is directly proportional to the product of the volume of the permanent magnet and the unit magnetic energy of the permanent-magnet material.
Description
Technical field
The present invention is a kind of inductive asynchronous permanent magnetic coupling of novel radial magnetic field, but is a kind of shock isolation load and power transmission shaft energy-efficient, the simple in structure device that is of coupled connections, and can be widely used in middle and small motor and drag and the power transmission field.
Background technology
In industrial and mining enterprises, using at present a large amount of AC asynchronous motor (comprising 380V/660V low-tension motor and 3KV/6KV middle voltage electromotor); It basically all is to adopt the ring flange d-axis to connect that conventional motor drags connection; Though have characteristics simple in structure, that transmission efficiency is higher; Bringing onto load connects and the not buffering that is rigidly connected of d-axis but because most connection occasions all belongs to; Thereby cause considerable asynchronous motor and dragging system thereof to be in the running status of non-economy, slattern a large amount of electric energy in vain.Trace it to its cause, roughly cause by following several kinds of situation:
1. because most of motor adopts band across-the-line starting mode at full capacity, except causing the impact and accident to electrical network and dragging system, 8～10 times starting current causes huge energy loss.
2. for satisfying the requirement of fully loaded big moment starting; When carrying out the motor capacity apolegamy, the big safe clearance that often covets, and raised without restriction; The result makes motor capacity excessive; Cause the phenomenon of " low load with strong power ", cause motor to depart from optimal working point, operational efficiency and power factor reduce.
3. consider from the performance driving economy of motor-driven manufacturing machine self, often require electric drive system to have transformation, speed change regulating power,, certainly will cause a large amount of additional electrical energy losses if drag with the constant speed level pressure.
Can know by the above analysis of causes; Cause the basic reason of a large amount of AC asynchronous motor non-economies operations of using of industrial circle to be that also the too simple ring flange rigidity d-axis connected mode of structure can't cushion the impact of full load starting, thereby cause due to the huge energy consumption.Though measures such as reduced voltage starting, electronics soft start have also been taked in the motor field that drags, and all are the impact loads of taking measures to limit electric motor starting from the motor input.
In recent years, along with the development as energy-saving and cost-reducing technological the making rapid progress.Drag the field at AC asynchronous motor, begin to occur the impact load when motor output end is isolated starting and realize new technology---the permanent magnetism couple drive and the speed adjusting technique of stepless speed regulation.The permanent magnetism couple drive of earliest known and speed adjusting technique are referring to United States Patent(USP) No. 5477094; It is permanent magnetism coupling speed regulator a kind of dish type axial magnetic field, that air gap is adjustable; This permanent magnetism coupling speed regulator is made up of as main driving-disc and the clutch plate that rare earth magnetic steel is installed the solid conductor copper dish of dish type; Its operation principle is an inductive loop and drive the permanent magnetism clutch plate through eddy current and follow the rotation acting when leaning on the solid copper disc spins, changes gas length through the gap length of regulating two wheel discs and adjusts the revolutional slip of two wheel discs and realize stepless speed regulation; This kind structure has its critical defect: first; In fact the solid copper dish has intercepted the magnetic circuit of rare earth magnetic steel; Cause the magnetic circuit magnetic resistance very big; The magnetic potential consumption that a large amount of rare earth magnetic steels provides causes air gap flux density very low on the contrary on the copper dish of a very low air gap of permeability and a magnetic circuit part, and the high energy product advantage of rare earth material does not fully obtain utilizing; The second, the eddy current that the solid copper dish causes responding to does not have the fixing flow direction and internal current is disorderly, and because the magnetic field intensity that the magnetic circuit that does not have the strong material of magnetic conduction to form particular path makes eddy current produce is not high yet.The defective of above magnetic structure and circuit structure causes this permanent magnetism coupling moment and power that speed regulator transmitted to receive very big restriction, and makes that the heating phenomenon of this permanent magnetism coupling speed regulator is very serious.
In the recent period; Domestic also in March, 2011 known several kinds of modified model patent structures to above-mentioned United States Patent (USP) technological deficiency; Referring to Chinese patent ZL200910162313.6, ZL200910148102.7 and ZL200910148103.1; These several kinds of patent structure comparison systems, thoroughly and all sidedly having solved the deficiency of United States Patent (USP), is the more satisfactory technical scheme that solves high voltage, high-power heavy AC asynchronous motor starting and constant-power speed regulation.But at middle-size and small-size low-voltage alternating-current asynchronous motors in the face of a large amount of uses of industrial circle; The permanent magnetism coupling speed regulator that more than lays particular emphasis on the patent structure of stepless speed regulation seems that again structure is too complicated; On using, receive very big restriction; But and exactly consume in this numerous middle-size and small-size low-voltage alternating-current asynchronous motor dragging system at a large amount of electric energy in national economy field, be far longer than high-tension, heavy AC asynchronous motor dragging system on the energy loss macroscopic view that it causes; Therefore; To middle-size and small-size low-tension motor dragging system (5kW～300kW); Solving the utility structure that starting-impact isolates should become to attach most importance to, a kind of simple in structure, install convenient and can adopt existing electric machine industry field maturation process technology and fast the novel inductive asynchronous permanent magnetic coupling applied of seriation be the task of top priority of current energy saving motor consumption reduction.
Summary of the invention
Drag to existing alternating current machine and on power is of coupled connections, to exist the problem that too simple ring flange rigidity d-axis connected mode can't cushion the full load starting-impact; And the critical defect of the known United States Patent(USP) No. 5477094 permanent magnetism coupling speed regulator of being explained; The present technique invention breaks through the permanent magnetism coupling technique restriction of simple axial magnetic field structure; But provide a kind of shock isolation load and energy-efficient, simple in structure, the power transmission shaft device new construction that is of coupled connections is installed easily, drag and the power transmission field but seriation ground is widely used in middle and small motor.Basic design of the present invention is: utilize the permanent-magnet stator structure of known AC induction motor cage rotor structure and pivot-rotatable type permanent magnet DC motor to carry out effective combination; With the band permanent magnet DC motor stator as the external rotor driving wheel by the dragging motor driven rotary; Conventional asynchronous machine cage rotor as the internal rotor driven pulley; The magnetic field of permanent magnet of servo-actuated will be responded to alternating current during the external rotor rotation in internal rotor mouse cage sliver; Thereby this electric current receives the effect of air-gap field again simultaneously and drives the internal rotor rotation; And having certain speed discrepancy all the time with external rotor, the magnetic field coupling through inner and outer rotors reaches buffering or isolates the effect of motor full load starting-impact load like this.
The inductive asynchronous permanent magnetic coupling of novel radial magnetic field is characterized in that: by the internal rotor and the band of band mouse cage conductor
2pThe external rotor of individual external rotor permanent magnet body is formed, and assembles becoming one overall structures with constitutional details such as front end housing, rear end cap, fore bearing, rear bearing, flange terminal pads; There is air gap to exist between internal rotor and the external rotor and is coupled, does not have machinery contact and friction to each other and become the coaxial line distribution through the radial magnetic field between air gap; The equidirectional asynchronous running of external rotor and internal rotor, the mechanical output of being transmitted are proportional to the product of unit magnetic energy product of volume and the permanent magnetic material of permanent magnet, its rotating speed
n 1And rotating speed
n 2There is revolutional slip
s,
sBe the decimal between 0～0.01, revolutional slip is defined as:
s=1-(
n 2÷
n 1).
Adopt the techno-economic effect that technique scheme reached:
Compare with AC induction motor traditional mechanical shaft joint, the inductive asynchronous permanent magnetic coupling of the novel radial magnetic field that the present invention relates to has following remarkable advantages:
1. energy-efficient: owing to the magnetic field coupling does not have the machinery contact; Even if the motor driving system that this inductive asynchronous permanent magnetic coupling is installed is under the motor full voltage starting; Its starting current also only is the starting under no load electric current of motor; Motor driving system than traditional installation mechanical type shaft joint reduces starting current at least more than 50%, and large tracts of land is promoted the energy loss in the time of can greatly practicing thrift the asynchronous machine starting.
2. save the dragging system cost: owing to reduced the impact of full load starting electric current; In the time of can making the dragging system type selecting, reduce the capacitance grade of dragging motor, not only reduce first cost of investment; And make the motor long-time running between high efficient area, thereby reduce the operating cost of motor.
3. shake little, noise is low, slow down load shock: also be owing to magnetic field coupling does not have the machinery contact, the vibrations and the noise that reduce load transfer can be arranged, also can effectively cushion the load impact that changes and bring of fluctuating suddenly simultaneously.
4. reliability is high, the life-span is long: do not contact owing to there is machinery, need not dustproof and waterproof etc., working service also and easy.
5. simple in structure, install convenient, non-maintaining: this inductive asynchronous permanent magnetic coupling is simple in structure, it is convenient to install.
6. owing to all be to utilize existing electric machine industry field maturation process technology, do not have crucial technical bottleneck restriction, after existing Y series and Y2 series asynchronous seriation design, seriation is applied and industrialization production fast.
Description of drawings
Fig. 1 is the sagittal plane topological diagram of the inductive asynchronous permanent magnetic coupling of novel radial magnetic field.
Fig. 2 is the axial stereochemical structure compound section figure of the inductive asynchronous permanent magnetic coupling of novel radial magnetic field.
More than among the figure: item 1 is a soket head cap screw, and item 2 is a front end housing, and item 3 is a hex bolts, and item 4 is a fore bearing; Item 5 is the flange terminal pad, and item 6 is a drive unit shaft extension part, and item 7 is the external rotor casing, and item 8 is the external rotor permanent magnet body; Item 9 is the internal rotor iron core, and item 10 is the mouse cage conductor, and item 11 is a flat key, and item 12 is an output shaft; Item 13 is a rear bearing, and item 14 is a rear end cap, and item 15 is a mouse cage end conducting ring.
In addition, letter character sign among the figure: N representes the permanent magnet of polarity N, and S representes the permanent magnet of polarity S,
n 1The rotating speed of expression drive motors axle 6,
n 2The rotating speed of expression output shaft 5 or load machinery connecting axle 21,2
pThe number of poles of expression external rotor permanent magnet body 8.
Embodiment
Below in conjunction with accompanying drawing and embodiment the internal structure relationship characteristic of the inductive asynchronous permanent magnetic coupling of the novel radial magnetic field that the present invention relates to is done further explanation; Wherein, Fig. 1 is the sagittal plane topological diagram of the inductive asynchronous permanent magnetic coupling of novel radial magnetic field, and Fig. 2 is the axial stereochemical structure compound section figure of the inductive asynchronous permanent magnetic coupling of novel radial magnetic field.Can know from figure:
(1) characteristic of the inductive asynchronous permanent magnetic coupling of the novel radial magnetic field of this case study on implementation is: by the internal rotor and the band of band mouse cage conductor 10
2pThe external rotor of individual external rotor permanent magnet body 8 is formed, and assembles becoming one overall structures with constitutional details such as front end housing 2, rear end cap 14, fore bearing 4, rear bearing 13, flange terminal pads 5; There is air gap to exist between internal rotor and the external rotor and is coupled, does not have machinery contact and friction to each other and become the coaxial line distribution through the radial magnetic field between air gap; The equidirectional asynchronous running of external rotor and internal rotor, the mechanical output of being transmitted are proportional to the product of unit magnetic energy product of volume and the permanent magnetic material of permanent magnet, its rotating speed
n 1And rotating speed
n 2There is revolutional slip
s,
sBe the decimal between 0～0.01, revolutional slip is defined as:
s=1-(
n 2÷
n 1).
(2) assemble on the interior circle of external rotor casing 7
2pIndividual external rotor permanent magnet body 8, external rotor permanent magnet body 8 adopts rare earth permanent-magnetic material to process, and distributes by the extremely spaced mode of the N utmost point, S; The steel of external rotor casing 7 usefulness magnetic conductions process, and two ends and front end housing 2, rear end cap 14 are located by connecting through the end cap seam and are fastening by soket head cap screw 1; Such outer-rotor structure and common pivot-rotatable type permanent magnet DC motor stator structure are in full accord, therefore on technology, do not have the restriction of technology; Flange terminal pad 5 is housed on the front end housing 2 end face seams and is fixed on the front end housing 2 by hex bolts 3, the endoporus of flange terminal pad 5 is connected with drive unit shaft extension part 6; Front end housing 2, rear end cap 14 are connected with output shaft 12 through fore bearing 4, rear bearing 13 respectively.
(3) excircle at internal rotor iron core 9 evenly offers cage grooves, be equiped with mouse cage conductor 10 that electric conducting material copper or aluminum do in the groove and in iron mandrel to two ends by mouse cage end conducting ring 15 short circuits; Through striking out punching shape, and endoporus and output shaft 12, flat key 11 close-fittings are combined into an integral body to internal rotor iron core 9 after laminating by silicon plate; The mode of welding constituted when the mouse cage winding adopted copper mouse cage conductor 10 to assemble with copper mouse cage end conducting ring 15, or adopted the mode of aluminium integral die-cast to make; The shape of cage grooves and groove number are followed the design rule of the inductive asynchronous motor cage rotor of prior art; This shows, its inner rotor core also fully and in full accord on the common alternating current machine cage rotor structure of prior art, manufacturing process technology is too.
(4) the inductive asynchronous permanent magnetic coupling of novel radial magnetic field adopts natural air cooled open type structure; On front end housing 2, rear end cap 14, all offer fan-shaped heat dissipation ventilation hole; Also offer the circular port of heat dissipation ventilation on the internal rotor iron core 9, the excircle of external rotor casing 7 offers the groove that increases area of dissipation.
Above-described only is the preferred implementation of present technique invention; For a person skilled in the art; Under the prerequisite that does not break away from the present technique inventive principle; Can also make some malformations and improvement (" mouse cage in the outer magnetic " malformation as the present invention is showed is the syndeton of " the outer mouse cage of interior magnetic " structure or appropriate change and motor and load etc.), these also should be regarded as the protection range of present technique invention, and these can not influence effect and practicality that the present technique invention is implemented.
Claims (4)
1. the inductive asynchronous permanent magnetic coupling of novel radial magnetic field is characterized in that: the inductive asynchronous permanent magnetic coupling of novel radial magnetic field is by the internal rotor and the band of band mouse cage conductor (10)
2pThe external rotor of individual external rotor permanent magnet body (8) is formed, and assembles becoming one overall structure with front end housing (2), rear end cap (14), fore bearing (4), rear bearing (13), flange terminal pad constitutional details such as (5); There is air gap to exist between internal rotor and the external rotor and is coupled, does not have machinery contact and friction to each other and become the coaxial line distribution through the radial magnetic field between air gap; The equidirectional asynchronous running of external rotor and internal rotor, the mechanical output of being transmitted are proportional to the product of unit magnetic energy product of volume and the permanent magnetic material of permanent magnet, its rotating speed
n 1And rotating speed
n 2There is revolutional slip
s,
sBe the decimal between 0～0.01, revolutional slip is defined as:
s=1-(
n 2÷
n 1).
2. the inductive asynchronous permanent magnetic coupling of novel radial magnetic field according to claim 1 is characterized in that: assemble on the interior circle of external rotor casing (7)
2pIndividual external rotor permanent magnet body (8), external rotor permanent magnet body (8) adopt rare earth permanent-magnetic material to process, and distribute by the extremely spaced mode of the N utmost point, S; External rotor casing (7) processes with the steel of magnetic conduction, and two ends and front end housing (2), rear end cap (14) are located by connecting through the end cap seam and are fastening by soket head cap screw (1); Flange terminal pad (5) is housed on front end housing (2) the end face seam and is fixed on the front end housing (2) by hex bolts (3), the endoporus of flange terminal pad (5) is connected with drive unit shaft extension part (6); Front end housing (2), rear end cap (14) are connected with output shaft (12) through fore bearing (4), rear bearing (13) respectively.
3. the inductive asynchronous permanent magnetic coupling of novel radial magnetic field according to claim 1; It is characterized in that: the excircle at internal rotor iron core (9) evenly offers cage grooves, be equiped with mouse cage conductor (10) that electric conducting material copper or aluminum do in the groove and in iron mandrel to two ends by mouse cage end conducting ring (15) short circuit; Through striking out punching shape, and endoporus and output shaft (12), flat key (11) close-fitting are combined into an integral body to internal rotor iron core (9) after laminating by silicon plate; The mode of welding constituted when the mouse cage winding adopted copper mouse cage conductor (10) to assemble with copper mouse cage end conducting ring (15), or adopted the mode of aluminium integral die-cast to make; The shape of cage grooves and groove number are followed the design rule of the inductive asynchronous motor cage rotor of prior art.
4. the inductive asynchronous permanent magnetic coupling of novel radial magnetic field according to claim 1; It is characterized in that: the inductive asynchronous permanent magnetic coupling of novel radial magnetic field adopts natural air cooled open type structure; On front end housing (2), rear end cap (14), all offer fan-shaped heat dissipation ventilation hole; Also offer the circular port of heat dissipation ventilation on the internal rotor iron core (9), the excircle of external rotor casing (7) offers the groove that increases area of dissipation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203678348U CN202334249U (en) | 2011-10-02 | 2011-10-02 | Novel radial magnetic field induction-type asynchronous permanent-magnet coupler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203678348U CN202334249U (en) | 2011-10-02 | 2011-10-02 | Novel radial magnetic field induction-type asynchronous permanent-magnet coupler |
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| Publication Number | Publication Date |
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| CN202334249U true CN202334249U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203678348U Expired - Fee Related CN202334249U (en) | 2011-10-02 | 2011-10-02 | Novel radial magnetic field induction-type asynchronous permanent-magnet coupler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883506A (en) * | 2014-03-21 | 2014-06-25 | 江苏罗思韦尔电气有限公司 | Variable displacement compressor |
| CN105322756A (en) * | 2015-12-09 | 2016-02-10 | 刁俊起 | Current-controlled permanent magnet speed controller |
| CN105720792A (en) * | 2016-03-30 | 2016-06-29 | 江苏磁谷科技股份有限公司 | Magnetic coupling |
| CN111697780A (en) * | 2020-06-22 | 2020-09-22 | 深圳市吉胜华力科技有限公司 | Electromagnetic eddy current clutch fan |
-
2011
- 2011-10-02 CN CN2011203678348U patent/CN202334249U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883506A (en) * | 2014-03-21 | 2014-06-25 | 江苏罗思韦尔电气有限公司 | Variable displacement compressor |
| CN105322756A (en) * | 2015-12-09 | 2016-02-10 | 刁俊起 | Current-controlled permanent magnet speed controller |
| CN105720792A (en) * | 2016-03-30 | 2016-06-29 | 江苏磁谷科技股份有限公司 | Magnetic coupling |
| CN111697780A (en) * | 2020-06-22 | 2020-09-22 | 深圳市吉胜华力科技有限公司 | Electromagnetic eddy current clutch fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20171002 |