CN103107679B - The permanent magnet eddy current coupling that a kind of disc type time-lag effect is less - Google Patents

The permanent magnet eddy current coupling that a kind of disc type time-lag effect is less Download PDF

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Publication number
CN103107679B
CN103107679B CN201310013037.3A CN201310013037A CN103107679B CN 103107679 B CN103107679 B CN 103107679B CN 201310013037 A CN201310013037 A CN 201310013037A CN 103107679 B CN103107679 B CN 103107679B
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permanent magnet
disk
eddy current
current coupling
metal dish
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CN103107679A (en
Inventor
甘春标
黄伟迪
杨世锡
池永为
王威
袁海辉
何俊
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Wuhu Mingxin motor energy saving Technology Co., Ltd.
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Zhejiang University ZJU
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Abstract

The invention discloses the permanent magnet eddy current coupling that a kind of disc type time-lag effect is less, comprise the power shaft be connected with motor output shaft, be connected with bearing axle output shaft, discoidal metal dish and disk, transmission connecting rod mechanism, wherein metal dish and disk are centered by the axis of transmission connecting rod mechanism, specular is arranged, adopt Interal fixation outside two metal dish to connect together, form a cage construction, power shaft is connected with metal dish center, transmission connecting rod mechanism band movable magnetic disc opposing metallic dish is close or zoom out transverse shifting, output shaft is connected with disk center, disk comprises disk cartridge and is located at the permanent magnet on disk cartridge, permanent magnet is divided into inside and outside two circles to be uniformly distributed on disk cartridge, the N pole of permanent magnet, S is extremely all along the axial distribution of disk, Internal and external cycle and be all the N pole of two adjacent permanent magnet of inner ring or outer ring, S pole is contrary each other.Time-lag effect of the present invention is little, and transmission efficiency is high, and heat-dissipating is little, is applicable to being applied to the occasion had higher requirements to adjusting speed accuracy.

Description

The permanent magnet eddy current coupling that a kind of disc type time-lag effect is less
Technical field
The present invention relates to permanent magnet eddy current coupling field.
Background technology
In actual life, use the transmission shaft driven system application of shaft coupling connection widely, almost relate to the field of motor power transmission in industrial occasions and life, all can use the transmission shaft driven technology of shaft coupling.The shaft coupling used in current mechanical field mostly is mechanical coupling, hydraulic type shaft coupling and permanent magnet eddy current coupling.Mechanical coupling is rigid connection, mechanical force transmitting torque.In installation process, owing to there is axial dipole field error, add the load supporting original paper; Radial offset error causes the dither of equipment by producing sudden change load.And rigid connection produces impact load instantaneously in startup.Fluid coupling speed governing-genus poor efficiency mode of speed regulation, speed adjustable range is limited, and throw switch at a high speed about 5%-10%, and low speed slip loss is large, reaches as high as more than 30% of rated power, precision is low, poor linearity, low-response, and starting current is large, and device is large, is not suitable for transformation; Easy leakage, maintenance complexity, expense greatly, can not meet the needs improving device integrated automation level.Permanent magnet eddy current coupling using magnetic force coupled drive technology, the shaft coupling of transmission of comparing, has following advantage: 1. energy-saving effect: 25% ~ 66%.2. maintenance workload is little, and be almost non-maintaining product, maintenance cost is extremely low.3. allow the larger installation error of centralization (maximum can be 5mm), enormously simplify Installation and Debugging process.4. there is overload protection function, thus improve the reliability of whole system, the damage that the system that completely eliminates causes because of overload.5. improve the startup ability of motor, reduce shock and vibration, coordinate the sharing of load that multimachine drives.6. speed-regulating type can realize the step-less adjustment of output speed when motor speed is substantially constant.7. long service life, designed life is 30 years.And can useful life of parts in prolongation system.8. be easy to realize remote control and automatically control, process control is accurately high.9. structure is simple, adapts to various adverse circumstances.Environmentally friendly, do not produce pollutant, do not produce harmonic wave.Volume is little, easy for installation.
The disc type permanent magnet eddy current coupling of technology maturation in the market, technical performance still has a lot of deficiency to need to improve, mainly contain: 1. the permanent magnet of existing disc type permanent magnet eddy current coupling is with the adjacent layout arrangement of opposite polarity two magnet along disk circumference, its drive efficiency is lower, and the magnetic torque power that unit volume provides is not high, caloric value is larger.2. existing permanent magnet eddy current coupling transmit comparatively high pulling torque time, its disk and metal dish can produce larger angle of retard, there is obvious time-lag effect, are unsuitable for the transmission that required precision is higher.3. existing permanent magnet eddy current coupling is when input rotating speed changes, the time-lag effect that output rotating speed changes is larger, when input rotating speed frequently changes, not only can not transmit corresponding torque in time, and the current vortex heat-dissipating that can make on metal dish, produce heat and raise accumulation rapidly, these features have impact on permanent magnet eddy current coupling and are applied to the occasion had higher requirements to adjusting speed accuracy.
Summary of the invention
Technical problem to be solved by this invention proposes the less permanent magnet eddy current coupling of a kind of time-lag effect of disc type.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is the permanent magnet eddy current coupling that openly a kind of disc type time-lag effect is less, comprise the power shaft be connected with motor output shaft, be connected with bearing axle output shaft, discoidal metal dish, discoidal disk, transmission connecting rod mechanism, wherein metal dish and disk are centered by the axis of transmission connecting rod mechanism, specular is arranged, adopt Interal fixation outside two metal dish to connect together, form a cage construction, power shaft is connected with metal dish center, transmission connecting rod mechanism band movable magnetic disc opposing metallic dish is close or zoom out transverse shifting, output shaft is connected with disk center, disk comprises disk cartridge and is located at the permanent magnet on disk cartridge, described permanent magnet is divided into inside and outside two circles to be uniformly distributed on disk cartridge, the N pole of permanent magnet, S is extremely all along the axial distribution of disk, Internal and external cycle and be all the N pole of two adjacent permanent magnet of inner ring or outer ring, S pole is contrary each other.
As preferably, the Internal and external cycle permanent magnet of described disk is all fan-shaped, and the central angle of Internal and external cycle permanent magnet distribution is identical.
As preferably, the permanent magnet of described disk, inner ring permanent magnet sectional area is larger relative to outer ring permanent magnet sectional area.
As preferably, the permanent magnet Internal and external cycle of described disk is set to a pair, whole disk distribution X to permanent magnet, X be greater than 0 even number.
As preferably, the permanent magnet of described disk be set to 16 to, 18 to or 20 right.
As preferably, described permanent magnet eddy current coupling also comprise be located at disk near transmission connecting rod mechanism side every magnetic copper coin.
As preferably, described permanent magnet eddy current coupling also comprises the fin of the metal dish both sides being located at cage construction.
Operation principle:
When power shaft drives metal dish to rotate, the disk opposing metallic dish connecting output shaft rotates, two pieces of metal dish all produce current vortex, make disk and output shaft rotation and then transmitting torque, by adjustment disk and metal dish gap, increase with gap smaller transmitting torque, speed discrepancy reduces, gap becomes large, and speed discrepancy increases, and realizes infinitely variable speeds.
On disk, total positive even numbers is divided into inside and outside two circles to permanent magnet, is uniformly distributed on disk cartridge along disk circumferencial direction, and permanent magnet is uniformly distributed that to be conducive to disk stressed identical in all directions, and the vibration of generation is less.The N pole of each permanent magnet, S are extremely all along the axial distribution of disk, and Internal and external cycle and to be all two adjacent permanent magnet N poles of inner ring or outer ring, S pole contrary each other, inner ring permanent magnet sectional area is comparatively large, and outer ring permanent magnet sectional area is less.Internal and external cycle permanent magnet is all fan-shaped, can reduce the magnetic resistance of metal between permanent magnet body, increases the current vortex intensity that induction produces, and increases the power and torque transmitted.
The action principle of permanent magnet eddy current coupling is that on metal dish, the change of magnetic flux causes producing current vortex, the disk of existing disc type permanent magnet eddy current coupling only has individual pen permanent magnet, its magnetic flux density leaks the large percentage in radial direction, and the effective magnetic flux density causing metal dish axial direction to be subject to is not high.Be divided into Internal and external cycle permanent magnet that inner ring permanent magnet can be made to leak less at the induction of radial direction, and outer ring permanent magnet volume is relatively little, permanent magnet can be reduced leak magnetic flux density at disk radial compared with individual pen permanent magnet, increase the useful flux metric density on the metal dish of cage construction, produce larger current vortex intensity, and then increase the power and torque transmitted, reduce the angle of retard between disk and metal dish.The rotating speed of output can be changed when input rotation speed change faster, transmit the torque changed in time, reduce the heat-dissipating amount on metal dish, improve the transmission efficiency of permanent magnet eddy current coupling and improve its time-lag effect.
Beneficial effect: the present invention is the technical scheme present permanent magnet eddy current coupling being provided to feasible core, time-lag effect is little, transmission efficiency is high, heat-dissipating is little, be applicable to being applied to the occasion had higher requirements to adjusting speed accuracy, and inventive principle is clear, device simple, can be applicable to industrial production, meets the product needed of association area to permanent magnet eddy current coupling with this.
Accompanying drawing explanation
By reference to the accompanying drawings, the other features and advantages of the invention can become clearer from below by the explanation of illustrating to the preferred implementation that principle of the present invention makes an explanation.
Fig. 1 is the two dimension assembling schematic diagram of a kind of execution mode of the permanent magnet eddy current coupling that a kind of disc type of the present invention time-lag effect is less;
Fig. 2 be the disc type permanent magnet eddy current coupling of prior art disk on the distribution schematic diagram of permanent magnet;
Fig. 3 is the end view of Fig. 2;
Fig. 4 be the disc type permanent magnet eddy current coupling of prior art disk on one circle permanent magnet permanent magnet between Distribution of Magnetic Field schematic diagram;
Fig. 5 be the disc type permanent magnet eddy current coupling of prior art disk on along the Distribution of Magnetic Field schematic diagram of disk radial;
Fig. 6 is the distribution schematic diagram of permanent magnet on disk in a kind of execution mode of the permanent magnet eddy current coupling that a kind of disc type of the present invention time-lag effect is less;
Fig. 7 is the end view of Fig. 6;
Fig. 8 be in a kind of execution mode of the permanent magnet eddy current coupling that a kind of disc type of the present invention time-lag effect is less on disk permanent magnet along the Distribution of Magnetic Field schematic diagram of disk radial.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described in detail:
As shown in Figure 1, a kind of disc type permanent magnet eddy current coupling, comprise the power shaft 5 be connected with motor output shaft, the output shaft 9 that to be connected with bearing axle, discoidal metal dish 2, discoidal disk 6, transmission connecting rod mechanism 3, be located at disk 6 near transmission connecting rod mechanism 3 side every magnetic copper coin 1, the fin 4 being located at metal dish 2 both sides of cage construction.Wherein metal dish and disk are centered by the axis 8 of transmission connecting rod mechanism 3, specular is arranged, adopt Interal fixation outside two metal dish to connect together, form a cage construction, power shaft 5 is connected with metal dish center, transmission connecting rod mechanism 3 be with movable magnetic disc 6 opposing metallic dish 2 near or zoom out transverse shifting, output shaft 9 is connected with disk 6 center.
As shown in Figure 2 and Figure 3, on the disk of prior art, permanent magnet is that individual layer is axially embedded on disk, N pole, S pole cycle arrangement, and its magnetic induction line produced as shown in Figure 4 and Figure 5.What Fig. 5 drew is the flux circuit that permanent magnet produces along disk radial direction, because air and the magnetic resistance every magnetic copper coin very large, so can not current vortex be produced by the magnetic induction line of air and disk cartridge, the magnetic field energy wasted exactly, in Fig. 5, the magnetic field energy of waste is many.
As shown in Figure 6, Figure 7, disk 6 of the present invention comprises disk cartridge and is located at the permanent magnet on disk cartridge, described permanent magnet is divided into inside and outside two circles to be uniformly distributed on disk cartridge, the N pole of permanent magnet, S extremely all along the axial distribution of disk 6, Internal and external cycle and to be all the N pole of two adjacent permanent magnet of inner ring or outer ring, S pole contrary each other.The Internal and external cycle permanent magnet of described disk is all fan-shaped, and the central angle of Internal and external cycle permanent magnet distribution is identical.The permanent magnet of described disk, inner ring permanent magnet sectional area is larger relative to outer ring permanent magnet sectional area.The permanent magnet Internal and external cycle of described disk is set to a pair, and X is to permanent magnet for the distribution of whole disk, X be greater than 0 even number, preferred permanent magnet be set to 16 to, 18 to or 20 right.
Figure 8 shows that the flux circuit that permanent magnet of the present invention produces along disk radial direction, compare with Fig. 5 and can find out, permanent magnet of the present invention decreases by air with every the magnetic induction line of magnetic copper coin, only have the part magnetic induction line of outer ring not produce current vortex, the power of therefore disk transmission of the present invention, torque and power are improved.
Permanent magnet eddy current coupling operation principle
Permanent magnet eddy current coupling power shaft is connected with motor output shaft, and permanent magnet eddy current coupling output shaft is connected with bearing axle, by the rotating speed of permanent magnet eddy current coupling regulation output axle.Rotational speed regulation is realized by the air gap changed between metal dish and disk.By transmission connecting rod mechanism, adjust the distance of two disks and axis, disk and axis only have relative translational movement, do not exist and relatively rotate.Disk spacing becomes large, and the spacing of disk and metal dish just diminishes, and can change the rotating speed of output shaft, torque and power output by adjustment size of gaps.Interfere with each other for avoiding magnetic field between disk and have every magnetic copper coin inside two disks.Mechanical fin is dispersed with outside metal dish.
Described disk is made up of disk cartridge and permanent magnet, even-even permanent magnet is divided into inside and outside two circle stationary distribution on disk cartridge, the N pole of permanent magnet, S are extremely all along the axial distribution of disk, Internal and external cycle and to be all two adjacent permanent magnet N poles of inner ring or outer ring, S pole contrary each other, inner ring permanent magnet sectional area is comparatively large, and outer ring permanent magnet sectional area is less, reduces the magnetic flux density of permanent magnet leakage at disk radial, increase on disk and produce current vortex intensity, Internal and external cycle permanent magnet is all fan-shaped.If permanent magnet logarithm very little, variation rate of magnetic flux is just less, and the current vortex that disk produces is just less, and carry-over moment is lower; If permanent magnet logarithm is too many, so between permanent magnet, the magnetic resistance of metal is comparatively large, and then can reduce the current vortex intensity of generation.Through test prove permanent magnet logarithm get 16 to, 18 to or 20 comparatively large to the moment transmitted, time-lag effect is less.
The permanent magnet eddy current coupling course of work is as follows: power shaft and the synchronized rotation of motor, power shaft connection metal dish, and the metal structure of cage type is rotated with motor synchronized.Adjust the distance between two disks according to the power output of input power and expection, when the cage type metal structure that disk distance is rotated is far away, the current vortex that magnetic induction line produces on metal dish is little, thus transmitting torque is little, disk and output shaft rotating speed low.When transmission connecting rod mechanism increases the spacing of disk and axis, the air gap between disk and metal dish reduces, and transmitting torque increases, and disk running speed increases.Axis is fixed on output shaft, horizontal direction is static, by the distance of transmission mechanism adjustable two disk and axis, reach the object of the magnetic gap simultaneously adjusting two pairs of disks and metal dish, simultaneously due to magnetic eddy current transmitting torque, input torque is delivered on disk, axis is connected with output shaft, the slip between output shaft and power shaft can be changed by gap length, and then according to torque and power requirement, the rotating speed of adjustment output shaft.
Although describe embodiments of the present invention by reference to the accompanying drawings, those of ordinary skill in the art can make various distortion or amendment within the scope of the appended claims.

Claims (5)

1. the permanent magnet eddy current coupling that a disc type time-lag effect is less, comprise the power shaft (5) be connected with motor output shaft, the output shaft (9) be connected with bearing axle, discoidal metal dish (2), discoidal disk (6), transmission connecting rod mechanism (3), wherein metal dish and disk are centered by the axis of transmission connecting rod mechanism (3) (8), specular is arranged, adopt Interal fixation outside two metal dish to connect together, form a cage construction, power shaft (5) is connected with metal dish center, transmission connecting rod mechanism (3) band movable magnetic disc (6) opposing metallic dish (2) is close or zoom out transverse shifting, output shaft (9) is connected with disk (6) center, it is characterized in that:
Disk (6) comprises disk cartridge and is located at the permanent magnet on disk cartridge, and described permanent magnet is divided into inside and outside two circles to be uniformly distributed on disk cartridge, and inner ring permanent magnet sectional area is larger relative to outer ring permanent magnet sectional area; The N pole of described permanent magnet, S extremely all along the axial distribution of disk (6), Internal and external cycle and to be all the N pole of two adjacent permanent magnet of inner ring or outer ring, S pole contrary each other; The Internal and external cycle permanent magnet of described disk (6) is all fan-shaped, and the central angle of Internal and external cycle permanent magnet distribution is identical.
2. the permanent magnet eddy current coupling that a kind of disc type time-lag effect according to claim 1 is less, is characterized in that: the permanent magnet Internal and external cycle of described disk (6) is set to a pair, and X is to permanent magnet for the distribution of whole disk, X be greater than 0 even number.
3. the permanent magnet eddy current coupling that a kind of disc type time-lag effect according to claim 2 is less, is characterized in that: the permanent magnet of described disk (6) be set to 16 to, 18 to or 20 right.
4. the permanent magnet eddy current coupling that a kind of disc type time-lag effect according to claim 1 is less, is characterized in that: described permanent magnet eddy current coupling also comprise be located at disk (6) near transmission connecting rod mechanism (3) side every magnetic copper coin (1).
5. the permanent magnet eddy current coupling that a kind of disc type time-lag effect according to any one of claim 1-4 is less, is characterized in that: described permanent magnet eddy current coupling also comprises the fin (4) of metal dish (2) both sides being located at cage construction.
CN201310013037.3A 2013-01-14 2013-01-14 The permanent magnet eddy current coupling that a kind of disc type time-lag effect is less Active CN103107679B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103107674B (en) * 2013-01-14 2015-05-27 浙江大学 Disks of permanent magnet eddy coupling with smaller time-lag effects in disc type
CN104660010B (en) * 2015-03-12 2017-08-25 江苏南自通华电力自动化股份有限公司 A kind of outer-rotor type vortex drive device
CN110805651B (en) * 2019-10-28 2020-11-17 华中科技大学 Self-adaptive adjusting eddy current damper

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CN101728930A (en) * 2009-12-15 2010-06-09 江苏大学 Adjustable-speed magnetic induction coupler
CN101777858A (en) * 2010-03-18 2010-07-14 王荣松 Cage type permanent magnetic driver
CN201854168U (en) * 2010-10-25 2011-06-01 西安交通大学 Axial permanent magnet synchronous coupling
CN102324830A (en) * 2011-08-31 2012-01-18 唐委校 Vertical permanent magnetic variable torque variable speed coupler with radiating device

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Publication number Priority date Publication date Assignee Title
US5334899A (en) * 1991-09-30 1994-08-02 Dymytro Skybyk Polyphase brushless DC and AC synchronous machines
CN2865126Y (en) * 2005-12-02 2007-01-31 北京市计算机技术研究所 Permanent-magnet disk type electric motor
CN101145726A (en) * 2007-10-30 2008-03-19 东南大学 Permanent magnetic vortex drive device
CN101673991A (en) * 2008-09-12 2010-03-17 西门子公司 Stator and axial flux permanent magnet gear
CN101728930A (en) * 2009-12-15 2010-06-09 江苏大学 Adjustable-speed magnetic induction coupler
CN101777858A (en) * 2010-03-18 2010-07-14 王荣松 Cage type permanent magnetic driver
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CN102324830A (en) * 2011-08-31 2012-01-18 唐委校 Vertical permanent magnetic variable torque variable speed coupler with radiating device

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Effective date of registration: 20160802

Address after: 241311, Wuhu County, Anhui City, Nanling province Yijiang town industrial concentration area

Patentee after: WUHU MINGXIN MACHINERY MANUFACTURING CO., LTD.

Address before: 310027 Hangzhou, Zhejiang Province, Xihu District, Zhejiang Road, No. 38, No.

Patentee before: Zhejiang University

Effective date of registration: 20160802

Address after: 241311, Wuhu County, Anhui City, Nanling province Yijiang town industrial concentration area

Patentee after: Wuhu Mingxin motor energy saving Technology Co., Ltd.

Address before: 241311, Wuhu County, Anhui City, Nanling province Yijiang town industrial concentration area

Patentee before: WUHU MINGXIN MACHINERY MANUFACTURING CO., LTD.