CN105720789A - Permanent magnet coupling - Google Patents
Permanent magnet coupling Download PDFInfo
- Publication number
- CN105720789A CN105720789A CN201610266620.9A CN201610266620A CN105720789A CN 105720789 A CN105720789 A CN 105720789A CN 201610266620 A CN201610266620 A CN 201610266620A CN 105720789 A CN105720789 A CN 105720789A
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- CN
- China
- Prior art keywords
- disk
- rotor
- permanent magnet
- steel disk
- early warning
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
A permanent magnet coupling belongs to the technical field of motor and drive, is applicable to soft start connection of motor driven pumps, wind driven generators, mine conveyors and other devices, and is to solve the problem that since a permanent magnet rotor has friction with a steel disk at the inner side of a squirrel-cage type rotor, the temperature of a steal disk rises instantly to generate sparks, thus burning up the permanent magnet coupling. The permanent magnet coupling is mainly characterized in that multiple ring-shaped grooves and multiple ring-shaped edges are arranged at at the outer sides of main and auxiliary steel disks which constitute the squirrel-cage type rotor, wherein the ring-shaped grooves and the ring-shaped edges constitute cooling grills; nonmetal warning pins are inlaid among permanent magnet blocks on the permanent magnet rotor composed of main and auxiliary magnet disks, two end heads of each warning pin are respectively slightly raised out of the surface of the permanent magnet rotor and a quantitative clearance is reserved between the two end heads and a copper disk of the squirrel-cage type rotor; when the squirrel-cage type rotor or the permanent magnet rotor has deviation, the warning pins and the copper disk of the squirrel-cage type rotor generate spark-free friction so that a temperature sensor at the outer side of the steel disk transmits ultimate temperature to a controller to carry out power-off protection, thus effectively protecting the operation safety of the permanent magnet coupling and further achieving an active safety effect.
Description
Technical field
The invention belongs to Electrical Machinery & Towage technical field, particularly relate to a kind of permanent magnet clutch coupled with load end for motor (hereinafter referred to as motor).
Background technology
Existing permanent magnet clutch, is widely used in the equipment such as motor drag water pump, blower fan, mine belt conveyer, for instance mine belt conveyer is through permanent magnet clutch and motor couples with decelerator what dragging ran.
At present, known permanent magnet clutch is generally divided into distance-limiting type, cartridge type, standard type according to manufacturing structure, the wherein basic structure of standard type permanent magnet clutch, mainly includes the main steel disk with eddy current copper dish, secondary steel disk, rigid magnetic disks with permanent magnet, disk arranges polylith permanent magnet.During assembling, secondary steel disk is through on reducer shaft with eddy current copper dish facing to motor side set, rigid magnetic disks with permanent magnet is arranged on the reducer shaft of load-side as p-m rotor, main steel disk is arranged on motor shaft with eddy current copper dish facing to load-side, the secondary steel disk that set is through on load-side reducer shaft is combined into cage rotor by screw element form with the main steel disk being arranged on motor shaft, and the p-m rotor that adjusting sleeve is contained in cage rotor completes to assemble with the air gap of eddy current copper dish on steel disk.
When motor runs, the cage rotor operating on motor shaft, the magnetic line of force of p-m rotor on cutting reducer axle, it is achieved the transmission of torque, drag load operation.
This existing permanent magnet clutch is in actual moving process, the cage rotor that major-minor steel disk is constituted can be made to produce to heat up, during the transporter oepration at full load of particularly high-power dragging, 60-90 degree Celsius and above temperature can be produced, the magnetic of the permanent magnet that long hot operation influences whether to be arranged on disk and manufactured by neodymium iron boron weakens, cause that magnetic field intensity declines, until demagnetizing completely.
Existing permanent magnet clutch is in actual moving process, affect due to long-play with by factors such as environmental geologies, likely cause motor or decelerator that trickle offset deviation occurs, this slight change can cause that trickle skew occurs in the air gap that p-m rotor and cage rotor are constituted, and this trickle skew needs to find in time and be corrected.Failing to find air gap skew in time, once cause p-m rotor friction raw with side copper hair updo in cage rotor, moment will producing spark and burn the accident of permanent magnet clutch, having in gas or explosive dust atmosphere if be arranged on, accident potential is more serious.
Summary of the invention
The purpose of the present invention, it is contemplated to the raw friction of copper hair updo solved inside because of p-m rotor and the cage rotor of permanent magnet clutch, cause steel disk moment to be heated up or produce spark, the problem burning permanent magnet clutch accident, devise a kind of permanent magnet clutch, it is ensured that heavy-duty motor and the safe operation at full capacity of trailing transporter.
The present invention is achieved by the following technical solutions: a kind of permanent magnet clutch, including the disk equipped with multiple Nd-Fe-B permanent magnetic blocks, steel disk equipped with vortex ring copper dish, wherein master disk is provided with the flange coupled with reducer shaft, the axis hole of secondary disk is more than the decelerator diameter of axle, Nd-Fe-B permanent magnetic block is embedded in the groove matched with it on master disk, secondary disk is covered permanent magnets accordingly and is buckled on master disk and is fastened as a whole composition p-m rotor by screw element form, eddy current copper dish and steel disk are combined into one by screw element form, main steel disk is provided with and coordinates the flange coupled with motor shaft, secondary steel disk axis hole is more than the external diameter of master disk flange and leaves gap, between main steel disk and secondary steel disk, set is loaded onto p-m rotor and is bolted composition cage rotor, air gap it is provided with between p-m rotor and cage rotor, it is characterized in that the main steel disk constituting cage rotor is provided with multiple tracks cannelure and multiple tracks annular rib with secondary steel disk lateral surface, multiple tracks cannelure constitutes the heat radiation grid of cage rotor with multiple tracks annular rib, by master disk, it is provided with nonmetal early warning pin-and-hole between the multiple permanent magnets installed on the p-m rotor that secondary disk is constituted, nonmetal early warning pin it is inlaid with in hole, two terminations of nonmetal early warning pin slightly prominent p-m rotor surface the copper card with cage rotor respectively maintain quantitative gap, for protecting p-m rotor and cage rotor to damage because of the tribological failure caused by sideslip.The geometry of the multiple permanent magnets arranged in p-m rotor is trapezoidal.The two ends diameter of nonmetal early warning pin is less than early warning pin mid diameter, it is simple to nonmetal early warning pin is embedded on major-minor disk and remains stable for.
The permanent magnet clutch of the present invention, adopts and goes out, by lathe car, the cannelure that multiple tracks is concentric outside cage rotor steel disk, and concentric cannelure and concentric annular rib constitute heat radiation grid.When permanent magnet clutch operates, dispel the heat grid self-assembling formation convection effect, it is possible to improves radiating efficiency and reduces running temperature.Especially for the belt conveyer that heavy-duty motor drags, it is possible to effectively reduce temperature produced by eddy current copper dish eddy current, there is result of use energetically.
Slightly prominent p-m rotor surface, the nonmetal early warning pin two arranged in early warning pin-and-hole on p-m rotor, quantitative gap is maintained with the copper dish of cage rotor, can when cage rotor or p-m rotor sideslip, first by the raw friction with the copper hair updo of cage rotor of nonmetal early warning plunger, this friction will not produce spark, and moment makes the steel disk temperature of cage rotor raise, it is arranged on the temperature sensor outside cage rotor steel disk and default limiting temperature is passed to controller enforcement power-off protection, can effectively protect the operation safety of permanent magnet clutch, there is positive safe effect.Permanent magnets is arranged to trapezoidal, it is possible to effectively utilize disk space, arranges the volume of permanent magnets to greatest extent, completes the purpose of the present invention.
Accompanying drawing explanation
Fig. 1 is master map, is the assembling structural representation of the permanent magnet clutch of the present invention；
Fig. 2 be permanent magnet clutch pair steel disk face structural representation；
Fig. 3 is the side-looking structural representation of Fig. 2；
Fig. 4 is that main steel disk faces structural representation；
Fig. 5 is the side-looking structural representation of Fig. 4；
Fig. 6 be master disk face structural representation；
Fig. 7 is the side-looking structural representation of Fig. 6；
Fig. 8 be secondary disk face structural representation；
Fig. 9 is the side-looking structural representation of Fig. 8；
Figure 10 is the geometry schematic diagram of permanent magnets；
Figure 11 is the structural representation of nonmetal early warning pin；
Figure 12 is the axle side assembling structural representation of permanent magnet clutch；
Wherein: the main steel disk of 1--, 2--pair steel disk, 3--cannelure, 4--annular rib, 5--permanent magnets, 6--pin-and-hole, 7--early warning pin, 8--stud, 9-loss of weight elongated slot, 10--copper dish, 11--master disk, 12--pair disk, the main steel disk flange of 13--, 14--pair steel disk axis hole, 15--master disk flange, 16--pair disk axis hole, 17--dormant bolt, 18--dovetail groove, 19--screw, 20--stud hole, 21--fillister head screw.
Detailed description of the invention
Comparison accompanying drawing illustrates, Fig. 1 is master map (being appointed as specification digest accompanying drawing), and the left side of Fig. 1 is load end, couples with decelerator, and right side is to couple motor side.Multiple Nd-Fe-B permanent magnetic blocks 5 of permanent magnet clutch are fabricated to trapezoidal, it is embedded in the dovetail groove 18 on disk, trapezoidal permanent magnets 5 is compared with the existing permanent magnets being designed to rectangle, disk area can be made full use of, improve the utilization rate of disk effective area, have and significantly increase permanent magnets area and increase the effect of magnetic flux.
Master disk 11 fastens with secondary disk 12 and assembles, and is fastened as a whole composition p-m rotor by fillister head screw 21；Master disk 11 is provided with the master disk flange 15 coupled with bearing axle, the axis hole 16 of secondary disk 12 is more than the motor diameter of axle, during assembling, / 2nd thickness of permanent magnets 5 are embedded on master disk 1 in the dovetail groove 18 matched with it, dovetail groove 18 on secondary disk 2 is directed at corresponding permanent magnets and clasps, another 1/2nd thickness making permanent magnets 5 are embedded in the dovetail groove 18 that secondary disk is matched, buckle major-minor disk alignment screw 19 fillister head screw 21 and tighten.For alleviating the weight of p-m rotor, major-minor disk has loss of weight elongated slot 9.
Steel disk equipped with annular copper dish 10 is divided into main steel disk 1, secondary steel disk 2, stud 8 is connected into cage rotor through main steel disk 1 and the upper stud hole 20 arranged of circle, secondary steel disk 2 outer, main steel disk 1 is provided with the main steel disk flange 13 coupled with motor shaft, main steel disk 1 and secondary steel disk 2 bolt 8 and couples composition cage rotor；The multiple tracks cannelure 3 arranged on the main steel disk 1 of cage rotor and secondary steel disk 2 lateral surface and multiple tracks annular rib 4 constitute the heat radiation grid of cage rotor, compared with the molecular heat radiation grid of heat radiation grid being respectively mounted multiple split on major-minor steel disk lateral surface, the radiating effect of the embedded heat radiation grid obviously constituted on steel disk body is obvious, has that environmental noise is relatively small and the simple feature of manufacturing process.
The nonmetal early warning pin 7 arranged between multiple permanent magnets on p-m rotor; its material can be that brake asbestos lining makes; two terminations of early warning pin 7 are slightly prominent magnetic disk surface 1--1.5 millimeter respectively; quantitative gap is maintained, it is possible to be effectively protected p-m rotor or cage rotor and produce spark because sideslip causes that disk rubs with copper dish with the copper dish 10 of cage rotor；When motor or decelerator are because there is trickle operation offset deviation, the air gap easily lead between the cage rotor of permanent magnet clutch and p-m rotor changes, once change, the termination that slightly highlights of nonmetal early warning pin 7 arranged on p-m rotor first with cage rotor inside the raw friction of copper hair updo, the moment friction of nonmetal early warning plunger and copper dish is damaged from copper panel surface, moment friction between the two can make to be quickly risen to the early warning temperature of setting by friction side steel disk temperature, early warning temperature can be passed through steel disk temperature outside sensor alarm and shut down by controlling switch, there is the good effect of protection permanent magnet clutch, reach purpose of design.
The moment friction of nonmetal early warning plunger and copper dish will not produce spark, it is possible to uses in the occasion with damp or dust, has result of use widely.
Claims (3)
1. a permanent magnet clutch, including the disk equipped with multiple Nd-Fe-B permanent magnetic blocks, steel disk equipped with vortex ring copper dish, wherein master disk is provided with the flange coupled with reducer shaft, the axis hole of secondary disk is more than the decelerator diameter of axle, Nd-Fe-B permanent magnetic block is embedded in the groove matched with it on master disk, secondary disk is covered permanent magnets accordingly and is buckled on master disk and is fastened as a whole composition p-m rotor by screw element form, eddy current copper dish and steel disk are combined into one by screw element form, main steel disk is provided with and coordinates the flange coupled with motor shaft, secondary steel disk axis hole is more than the external diameter of master disk flange and leaves gap, between main steel disk and secondary steel disk, set is loaded onto p-m rotor and is bolted composition cage rotor, air gap it is provided with between p-m rotor and cage rotor, it is characterized in that the main steel disk (1) of composition cage rotor and secondary steel disk (2) lateral surface are provided with multiple tracks cannelure (3) and multiple tracks annular rib (4), multiple tracks cannelure (3) constitutes the heat radiation grid of cage rotor with multiple tracks annular rib (4), it is provided with nonmetal early warning pin-and-hole (6) between the multiple permanent magnets (5) installed on the p-m rotor being made up of the secondary disk (12) of master disk (11), nonmetal early warning pin (7) it is inlaid with in hole (6), two terminations of nonmetal early warning pin (7) slightly prominent p-m rotor surface the copper card with cage rotor respectively maintain quantitative gap.
2. the permanent magnet clutch described in claim 1, it is characterised in that the geometry of the multiple permanent magnets arranged in p-m rotor is trapezoidal.
3. the permanent magnet clutch described in claim 1, it is characterised in that the two ends diameter of nonmetal early warning pin is less than early warning pin mid diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266620.9A CN105720789A (en) | 2016-04-26 | 2016-04-26 | Permanent magnet coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610266620.9A CN105720789A (en) | 2016-04-26 | 2016-04-26 | Permanent magnet coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105720789A true CN105720789A (en) | 2016-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610266620.9A Pending CN105720789A (en) | 2016-04-26 | 2016-04-26 | Permanent magnet coupling |
Country Status (1)
| Country | Link |
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| CN (1) | CN105720789A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631544A (en) * | 2017-03-15 | 2018-10-09 | 迈格钠磁动力股份有限公司 | Explosion-proof low noise type permanent magnetic coupling |
| CN110089015A (en) * | 2016-12-21 | 2019-08-02 | 日本制铁株式会社 | Eddy-current reduction gear |
| CN113809882A (en) * | 2021-08-16 | 2021-12-17 | 郭定云 | Vacuum pump power assembly |
Citations (7)
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|---|---|---|---|---|
| US20050099077A1 (en) * | 2003-11-10 | 2005-05-12 | Gerfast Sten R. | Magnetic coupling using magnets on a motor rotor |
| CN102263483A (en) * | 2011-07-26 | 2011-11-30 | 融德（大连）机电工程设备有限公司 | Magnetic coupler with anti-collision ring |
| CN102270923A (en) * | 2011-07-26 | 2011-12-07 | 融德（大连）机电工程设备有限公司 | Magnetic coupling with anti-collision bearings |
| CN202172357U (en) * | 2011-08-22 | 2012-03-21 | 王兴君 | Intelligent protective type disc electromagnetic coupling |
| CN203009764U (en) * | 2012-11-30 | 2013-06-19 | 上海曜中能源科技有限公司 | Permanent magnet coupler for belt drive |
| CN104052240A (en) * | 2014-04-28 | 2014-09-17 | 苏州思孚瑞节能传动技术有限公司 | Off-line speed regulation permanently-magnetic transmission device |
| CN205610460U (en) * | 2016-04-26 | 2016-09-28 | 贾建伟 | Permanent magnet coupling |
-
2016
- 2016-04-26 CN CN201610266620.9A patent/CN105720789A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050099077A1 (en) * | 2003-11-10 | 2005-05-12 | Gerfast Sten R. | Magnetic coupling using magnets on a motor rotor |
| CN102263483A (en) * | 2011-07-26 | 2011-11-30 | 融德（大连）机电工程设备有限公司 | Magnetic coupler with anti-collision ring |
| CN102270923A (en) * | 2011-07-26 | 2011-12-07 | 融德（大连）机电工程设备有限公司 | Magnetic coupling with anti-collision bearings |
| CN202172357U (en) * | 2011-08-22 | 2012-03-21 | 王兴君 | Intelligent protective type disc electromagnetic coupling |
| CN203009764U (en) * | 2012-11-30 | 2013-06-19 | 上海曜中能源科技有限公司 | Permanent magnet coupler for belt drive |
| CN104052240A (en) * | 2014-04-28 | 2014-09-17 | 苏州思孚瑞节能传动技术有限公司 | Off-line speed regulation permanently-magnetic transmission device |
| CN205610460U (en) * | 2016-04-26 | 2016-09-28 | 贾建伟 | Permanent magnet coupling |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110089015A (en) * | 2016-12-21 | 2019-08-02 | 日本制铁株式会社 | Eddy-current reduction gear |
| CN108631544A (en) * | 2017-03-15 | 2018-10-09 | 迈格钠磁动力股份有限公司 | Explosion-proof low noise type permanent magnetic coupling |
| CN113809882A (en) * | 2021-08-16 | 2021-12-17 | 郭定云 | Vacuum pump power assembly |
| CN113809882B (en) * | 2021-08-16 | 2023-11-14 | 浙江维朋制冷设备有限公司 | Vacuum pump power assembly |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |