CN203056818U - Disc type synchronous non-contact transmission permanent magnet shaft coupling - Google Patents
Disc type synchronous non-contact transmission permanent magnet shaft coupling Download PDFInfo
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- CN203056818U CN203056818U CN 201320053894 CN201320053894U CN203056818U CN 203056818 U CN203056818 U CN 203056818U CN 201320053894 CN201320053894 CN 201320053894 CN 201320053894 U CN201320053894 U CN 201320053894U CN 203056818 U CN203056818 U CN 203056818U
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- axle sleeve
- card
- clutch plate
- driving disc
- permanent magnet
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Abstract
The utility model is a disc type synchronous non-contact transmission permanent magnet shaft coupling which belongs to the new field of electromagnet application. The device comprises a driving disc, and driven disc, annular even number strong magnet bodies, and a axial force inhibiting apparatus which is clamped by inner rings of disc faces between the two discs, wherein the driving disc and the driven disc are symmetrically arranged in the axial direction and are provided with easy-to-dismount spindle sleeves, the annular even number strong magnet bodies are symmetrically and alternately arranged in the N and S pole order on middle rings of disc faces of the two discs, a disassembly adjusting mechanism and a wireless limiting sensor are symmetrically arranged on an outer ring of the disc face of the driving disc, advance and retreat guiding screws and a double polar distance limiting hole are arranged on an outer ring of the disc face of the driven disc, and a mechanism for inhibiting axial direction play of centrifugal force of an electromagnetic brake moving end is symmetrically arranged at a back face of the driven disc. Compared with other mechanical shaft couplings, the device is advantaged by convenience and quickness of dismounting operation, shock absorption property, noise reducing property, overload protection function, and the like. The disc type synchronous non-contact transmission permanent magnet shaft coupling is suitable for a transmission machine which is characterized by frequent direction changes and starts and stops, and leak-free transmission. The disc type synchronous non-contact transmission permanent magnet shaft coupling is particularly suitable for a vertical type oil pumping device provided with a reversing motor.
Description
Technical field:
The utility model is the synchronous noncontact transmission of a kind of disc type permanent magnet clutch, belongs to the electromagnetic application frontier.
Background technology:
The Human's production activity relies on pump mostly, and the fault-free of pump is moved the height that has determined production efficiency continuously.And pump miscellaneous all relies on dissimilar contact positive coupling transferring power, realizes the increment demand of human material progress and cultural and ideological progress.Along with the development of high energy product, high-coercive force rare earth permanent magnetic material, established material base for realizing permanent magnetism noncontact transmission.
Permanent magnetism noncontact transmission the earliest starts from the conveying of the easy contaminated-fluid of poisonous and harmful, because permanent magnet can noncontact transmit moment of torsion, people isolate fully with original machine output shaft and fluid pump power shaft that non-magnet material will arrange permanent magnet clutch, realized the totally-enclosed conveying, step a most successful step for the mankind explore the permanent magnetism drive technology, and set up the instructive model for follow-up developments.
The large-scale open-ocean operations naval vessel of military industry field, because wave acutely rises and falls, moderate finite deformation can appear in hull, cause pump shaft coupling failure rate height, directly influence fighting efficiency, therefore U.S. Johns restrains the permanent magnet clutch that takes the lead in using the noncontact transmission on Tanis number and the USS Nimitz aircraft carrier, has obtained good effect, fries the application upsurge that has played the permanent magnetism drive technology.
Under the drive of military project high-tech and poisonous and harmful and the widely-used permanent magnet clutch of easy pollution medium conveying, to reliability with exempt to pollute all kinds of gearings of industry such as the chemical industry of having relatively high expectations, medical and health, food, semiconductor, vacuum field, oil, electric power, bring in constant renewal in original rigid attachment kind of drive, replace the permanent magnet clutch of noncontact transmission, promote the raising of the progress of permanent magnetism drive technology and benefit, be called as the boost motor of the industrial revolution next time.
Permanent magnet clutch divides synchronous mode, eddy current type, hysteresis, reluctance type four classes by operation principle.
The synchronous mode permanent magnet clutch is to arrange permanent magnet alternately by N, S polar-symmetric on two half a couplers, transmits moment of torsion by the push-and-pull action power of permanent magnet with synchronous speed between the two.Advantage be simple in structure, reliability and durability, transmit that moment of torsion is big, transmission efficiency is high.Shortcoming is to exceed the quata to decide torsion coupling to skid easily, causes the high temperature demagnetization.
The eddy-current permanent magnetic shaft coupling changes the synchronous mode internal rotor into copper ring, when rotating, external rotor produces rotating magnetic field, copper ring on the internal rotor produces induced current because of cutting magnetic line, this faradic magnetic field and external rotor permanent magnet body magnetic field interaction make internal rotor rotate with external rotor and transmit moment of torsion.Advantage is that internal rotor does not have permanent magnetic material, can rotate in the liquid of sealing, adapts to the higher medium of delivery temperature.Shortcoming is that rotor copper ring must could be rotated by cutting magnetic line, has the slip loss, is usually used in the undemanding transmission of rotating speed requirement.
The hysteresis permanent magnet clutch utilizes soft magnetic material to be in the characteristic of remagnetization in the course of the work, itself and permanent magnetic material combination are made permanent magnetism-magnetic hysteresis shaft coupling, the two suction obviously reduces than the suction between permanent magnet, but change the relative rotation between the two easily, be usually used in becoming the connection of moment of torsion.
Reluctance type permanent magnet clutch external rotor is with radial is identical synchronously, and internal rotor soft magnetic material salient pole utilizes the internal rotor with salient pole suction of external rotor magnet to drive the internal rotor rotation, and it is obviously not enough to transmit moment of torsion, is used for small-sized magnetic drive device.
In the above-mentioned all kinds of permanent magnet clutch, because the synchronous permanent-magnet coupler structure is simple, reliability and durability, transmission efficiency is high, becomes the dominant type of permanent magnet clutch.
Though the synchronous permanent-magnet shaft coupling has very big technical advantage than other type permanent magnet clutch, also has following drawback:
The one, axial force is big, and is bigger to driving and driven gearing harm;
The 2nd, ferromagnetic material has very high magnetic energy product, wastes time and energy in dismounting and regulating the qi flowing in the channels crack;
The 3rd, exceed the quata to decide moment of torsion and can cause shaft coupling to skid, cause the high temperature demagnetization.
Above-mentioned three drawbacks have influenced the large-scale promotion of permanent magnet clutch, demand developing a kind of permanent magnet clutch of new construction urgently, solve an above-mentioned difficult problem, promote the innovation of permanent magnetism drive technology and popularize.
Summary of the invention:
The purpose of this utility model is to utilize active force and reaction force equal and opposite in direction, principle that direction is opposite; explore a kind of axial force restraining device and solve dismounting and an overload protection difficult problem at one stroke; realize the technological innovation of synchronous permanent-magnet shaft coupling, obtain economic benefit and social benefit convenient to disassembly, safe and reliable to operation, that use low-consumption high-efficiency, easy maintenance easily to go.
The synchronous noncontact transmission of the utility model disc type permanent magnet clutch technical solution is:
The synchronous noncontact transmission of described disc type permanent magnet clutch comprises axially that ring is gone up in symmetrically arranged driving disc spacing pressing with axle sleeve easy to assemble (2), clutch plate (3) and the above-mentioned two dish cards and press the interior axial force restraining device that encircles clamping of card between N, the mutual annular even number kicker magnet of arranging (9) of S utmost point order symmetry and two dishes, wherein is symmetrical arranged dismounting governor motion, wireless limit sensors on driving disc spacing pressing (2) the card outer shroud; Advance and retreat lead screw and bipolar apart from spacing hole (12) is set on clutch plate (3) the card outer shroud, and its back side is symmetrical arranged and suppresses electromagnetic brake movable end centrifugal force axial endplay mechanism.
Described axle sleeve easy to assemble is for connecting the telescopic connector of driving shaft and driven shaft, and its version is one of following three types:
First kind of driving disc spacing pressing (2), axle sleeve (5) are respectively integral structure with clutch plate (3) and another axle sleeve or are integral structure separately, and the axle sleeve inner headed face splines, with cooperating of master and slave moving axis be interference fit;
Second kind of driving disc spacing pressing (2), axle sleeve (5) are respectively split-type structural or are split-type structural separately with clutch plate (3) and another axle sleeve, card is fastening with connecting with single or double fastening bolt (6) of axle sleeve, its axle sleeve inner headed face splines, the axle sleeve body jackscrew screw of getting on the bus is with cooperating of master and slave moving axis to be that axle sleeve, key interference fits add jackscrew (8) fastening;
The third driving disc spacing pressing (2), axle sleeve (5) are respectively integral type or split-type structural with clutch plate (3) and another axle sleeve, its axle sleeve inner headed face splines, the axle sleeve body locking screw that cracks of getting on the bus, with cooperating of master and slave moving axis be axle sleeve, that the key matched in clearance adds the clamping screw that cracks is fastening.
Described axial force restraining device version is one of following three types:
First kind is mechanical type axial force restraining device, ring or card outer shroud car pressure bearing groove in driving disc spacing pressing (2), clutch plate (3) card, the pressure bearing of built-in counteracting axial force (10), wherein the pressure bearing groove radius of clutch plate (3) is slightly less than the pressure bearing groove radius of driving disc spacing pressing (2);
Second kind is magneto axial force restraining device, and the kicker magnet ring that suppresses axial force by same polarity repulsion is set on ring or the card outer shroud in driving disc spacing pressing (2), clutch plate (3) card;
The third is the hybrid axial force restraining device of radial and axial magnetization, and two groups of kicker magnet rings of diametrical magnetization are set on the positive and negative card outer shroud of driving disc spacing pressing (2), and the axial magnetized kicker magnet ring that suppresses axial force is connected on the clutch plate (3) from driving disc spacing pressing (2) outer rim.
Described dismounting governor motion version is one of following two types:
First kind is that ring arranges adjusting screw(rod) (1) in driving disc spacing pressing (2) card outer shroud or card;
Second kind is that ring arranges the advance and retreat lead screw in clutch plate (3) card outer shroud or card.
Described kicker magnet (9) is shaped as segment or cuboid, is fixed in driving disc spacing pressing (2), clutch plate (3) card on the ring with kicker magnet hold-down screw or binding groove, and the arrangement mode of kicker magnet (9) is one of following three types:
First kind for pressing N, the mutual dense arrangement even number kicker magnet (9) of S utmost point order symmetry;
Second kind for pressing N, the mutual dispersed arrangement even number kicker magnet (9) of S utmost point order symmetry;
The third arranges the axial magnetized same polarity kicker magnet ring that suppresses axial force for pressing N, the mutual intensive or dispersed arrangement even number kicker magnet (9) of S utmost point order symmetry on ring or the card outer shroud in card.
Described clutch plate (3) back side symmetrically arranged inhibition electromagnetic brake movable end centrifugal force axial endplay mechanism, its version is one of following two types:
First kind is milled outside keyway for clutch plate (3) body, and outside keyway and electromagnetic brake do not have winding terminal and be combined as stiff end, and electromagnetic brake has winding terminal to be combined as movable end with the preloading spring and the load end that suppress the centrifugal force axial endplay;
Second kind for being symmetrical arranged 3-6 adhesive magnet opening (4) that suppresses electromagnetic brake movable end centrifugal force axial endplay at clutch plate (3) back side.
Described bipolarly be arranged on clutch plate (3) the card outer shroud apart from spacing hole (12), driving disc spacing pressing (2) card outer shroud corresponding position with it arrange overload and skid and namely instruct outage to shut down the wireless limit sensors of brake interlock protection above two pole spans of kicker magnet.
The utility model disc type synchronous noncontact transmission permanent magnet clutch and other machenical coupling relatively have convenient to disassembly, advantages such as reversing impact is little, damping noise reduction, overload protection.
Description of drawings:
Fig. 1 is the synchronous noncontact transmission of disc type permanent magnet clutch structural representation;
Fig. 2 is that the clutch plate kicker magnet of Fig. 1 is arranged schematic diagram.
Wherein: 1. adjusting screw(rod); 2. driving disc spacing pressing; 3. clutch plate; 4. adhesive magnet opening; 5. axle sleeve; 6. fastening bolt; 7. keyway; 8. jackscrew; 9. kicker magnet; 10. pressure bearing; 11. advance and retreat lead screw screw; 12. it is bipolar apart from spacing hole; 13. fastening screw.
Embodiment:
As depicted in figs. 1 and 2, the synchronous noncontact transmission of the utility model disc type permanent magnet clutch comprises axially that ring is gone up in symmetrically arranged driving disc spacing pressing with axle sleeve easy to assemble (2), clutch plate (3) and the above-mentioned two dish cards and press the interior axial force restraining device that encircles clamping of card between N, the mutual annular even number kicker magnet of arranging (9) of S utmost point order symmetry and two dishes, wherein is symmetrical arranged dismounting governor motion, wireless limit sensors on driving disc spacing pressing (2) the card outer shroud; Advance and retreat lead screw and bipolar apart from spacing hole (12) is set on clutch plate (3) the card outer shroud, and its back side is symmetrical arranged and suppresses electromagnetic brake movable end centrifugal force axial endplay mechanism.
Described axle sleeve easy to assemble is for connecting the telescopic connector of driving shaft and driven shaft, and its version is one of following three types:
First kind of driving disc spacing pressing (2), axle sleeve (5) are respectively integral structure with clutch plate (3) and another axle sleeve or are integral structure separately, and the axle sleeve inner headed face splines, with cooperating of master and slave moving axis be interference fit;
Second kind of driving disc spacing pressing (2), axle sleeve (5) are respectively split-type structural or are split-type structural separately with clutch plate (3) and another axle sleeve, card is fastening with connecting with single or double fastening bolt (6) of axle sleeve, its axle sleeve inner headed face splines, the axle sleeve body jackscrew screw of getting on the bus is with cooperating of master and slave moving axis to be that axle sleeve, key interference fits add jackscrew (8) fastening;
The third driving disc spacing pressing (2), axle sleeve (5) are respectively integral type or split-type structural with clutch plate (3) and another axle sleeve, its axle sleeve inner headed face splines, the axle sleeve body locking screw that cracks of getting on the bus, with cooperating of master and slave moving axis be axle sleeve, that the key matched in clearance adds the clamping screw that cracks is fastening.
Described axial force restraining device version is one of following three types:
First kind is mechanical type axial force restraining device, ring or card outer shroud car pressure bearing groove in driving disc spacing pressing (2), clutch plate (3) card, the pressure bearing of built-in counteracting axial force (10), wherein the pressure bearing groove radius of clutch plate (3) is slightly less than the pressure bearing groove radius of driving disc spacing pressing (2);
Second kind is magneto axial force restraining device, and the kicker magnet ring that suppresses axial force by same polarity repulsion is set on ring or the card outer shroud in driving disc spacing pressing (2), clutch plate (3) card;
The third is the hybrid axial force restraining device of radial and axial magnetization, and two groups of kicker magnet rings of diametrical magnetization are set on the positive and negative card outer shroud of driving disc spacing pressing (2), and the axial magnetized kicker magnet ring that suppresses axial force is connected on the clutch plate (3) from driving disc spacing pressing (2) outer rim.
Described dismounting governor motion version is one of following two types:
First kind is that ring arranges adjusting screw(rod) (1) in driving disc spacing pressing (2) card outer shroud or card;
Second kind is that ring arranges the advance and retreat lead screw in clutch plate (3) card outer shroud or card.
Described kicker magnet (9) is shaped as segment or cuboid, is fixed in driving disc spacing pressing (2), clutch plate (3) card on the ring with kicker magnet hold-down screw or binding groove, and the arrangement mode of kicker magnet (9) is one of following three types:
First kind for pressing N, the mutual dense arrangement even number kicker magnet (9) of S utmost point order symmetry;
Second kind for pressing N, the mutual dispersed arrangement even number kicker magnet (9) of S utmost point order symmetry;
The third arranges the axial magnetized same polarity kicker magnet ring that suppresses axial force for pressing N, the mutual intensive or dispersed arrangement even number kicker magnet (9) of S utmost point order symmetry on ring or the card outer shroud in card.
Described clutch plate (3) back side symmetrically arranged inhibition electromagnetic brake movable end centrifugal force axial endplay mechanism, its version is one of following two types:
First kind is milled outside keyway for clutch plate (3) body, and outside keyway and electromagnetic brake do not have winding terminal and be combined as stiff end, and electromagnetic brake has winding terminal to be combined as movable end with the preloading spring and the load end that suppress the centrifugal force axial endplay;
Second kind for being symmetrical arranged 3-6 adhesive magnet opening (4) that suppresses electromagnetic brake movable end centrifugal force axial endplay at clutch plate (3) back side.
Described bipolarly be arranged on clutch plate (3) the card outer shroud apart from spacing hole (12), driving disc spacing pressing (2) card outer shroud corresponding position with it arrange overload and skid and namely instruct outage to shut down the wireless limit sensors of brake interlock protection above two pole spans of kicker magnet.
The designing technique parameter is as follows:
Nominal torque: 700Nm;
Rated speed: 1000r/min;
Adapt to the diameter of axle: motor diameter of axle ∮ 65 * 140, reductor diameter of axle ∮ 48 * 100;
Motor power (output): 37kw.
Claims (7)
1. the synchronous noncontact transmission of disc type permanent magnet clutch, it is characterized in that: this device comprises axially that ring is gone up in symmetrically arranged driving disc spacing pressing with axle sleeve easy to assemble (2), clutch plate (3) and the above-mentioned two dish cards and press the interior axial force restraining device that encircles clamping of card between N, the mutual annular even number kicker magnet of arranging (9) of S utmost point order symmetry and two dishes, wherein is symmetrical arranged dismounting governor motion, wireless limit sensors on driving disc spacing pressing (2) the card outer shroud; Advance and retreat lead screw and bipolar apart from spacing hole (12) is set on clutch plate (3) the card outer shroud, and its back side is symmetrical arranged and suppresses electromagnetic brake movable end centrifugal force axial endplay mechanism.
2. the synchronous noncontact transmission of disc type according to claim 1 permanent magnet clutch is characterized in that: described axle sleeve easy to assemble is for connecting the telescopic connector of driving shaft and driven shaft, and its version is one of following three types:
First kind of driving disc spacing pressing (2), axle sleeve (5) are respectively integral structure with clutch plate (3) and another axle sleeve or are integral structure separately, and the axle sleeve inner headed face splines, with cooperating of master and slave moving axis be interference fit;
Second kind of driving disc spacing pressing (2), axle sleeve (5) are respectively split-type structural or are split-type structural separately with clutch plate (3) and another axle sleeve, card is fastening with connecting with single or double fastening bolt (6) of axle sleeve, its axle sleeve inner headed face splines, the axle sleeve body jackscrew screw of getting on the bus is with cooperating of master and slave moving axis to be that axle sleeve, key interference fits add jackscrew (8) fastening;
The third driving disc spacing pressing (2), axle sleeve (5) are respectively integral type or split-type structural with clutch plate (3) and another axle sleeve, its axle sleeve inner headed face splines, the axle sleeve body locking screw that cracks of getting on the bus, with cooperating of master and slave moving axis be axle sleeve, that the key matched in clearance adds the clamping screw that cracks is fastening.
3. the synchronous noncontact transmission of disc type according to claim 1 permanent magnet clutch is characterized in that: described axial force restraining device version is one of following three types:
First kind is mechanical type axial force restraining device, ring or card outer shroud car pressure bearing groove in driving disc spacing pressing (2), clutch plate (3) card, the pressure bearing of built-in counteracting axial force (10), wherein the pressure bearing groove radius of clutch plate (3) is slightly less than the pressure bearing groove radius of driving disc spacing pressing (2);
Second kind is magneto axial force restraining device, and the kicker magnet ring that suppresses axial force by same polarity repulsion is set on ring or the card outer shroud in driving disc spacing pressing (2), clutch plate (3) card;
The third is the hybrid axial force restraining device of radial and axial magnetization, and two groups of kicker magnet rings of diametrical magnetization are set on the positive and negative card outer shroud of driving disc spacing pressing (2), and the axial magnetized kicker magnet ring that suppresses axial force is connected on the clutch plate (3) from driving disc spacing pressing (2) outer rim.
4. the synchronous noncontact transmission of disc type according to claim 1 permanent magnet clutch is characterized in that: described dismounting governor motion version is one of following two types:
First kind is that ring arranges adjusting screw(rod) (1) in driving disc spacing pressing (2) card outer shroud or card;
Second kind is that ring arranges the advance and retreat lead screw in clutch plate (3) card outer shroud or card.
5. the synchronous noncontact transmission of disc type according to claim 1 permanent magnet clutch, it is characterized in that: described kicker magnet (9) is shaped as segment or cuboid, be fixed in driving disc spacing pressing (2), clutch plate (3) card on the ring with kicker magnet hold-down screw or binding groove, the arrangement mode of kicker magnet (9) is one of following three types:
First kind for pressing N, the mutual dense arrangement even number kicker magnet (9) of S utmost point order symmetry;
Second kind for pressing N, the mutual dispersed arrangement even number kicker magnet (9) of S utmost point order symmetry;
The third arranges the axial magnetized same polarity kicker magnet ring that suppresses axial force for pressing N, the mutual intensive or dispersed arrangement even number kicker magnet (9) of S utmost point order symmetry on ring or the card outer shroud in card.
6. the synchronous noncontact transmission of disc type according to claim 1 permanent magnet clutch is characterized in that: described clutch plate (3) back side symmetrically arranged inhibition electromagnetic brake movable end centrifugal force axial endplay mechanism, and its version is one of following two types:
First kind is milled outside keyway for clutch plate (3) body, and outside keyway and electromagnetic brake do not have winding terminal and be combined as stiff end, and electromagnetic brake has winding terminal to be combined as movable end with the preloading spring and the load end that suppress the centrifugal force axial endplay;
Second kind for being symmetrical arranged 3-6 adhesive magnet opening (4) that suppresses electromagnetic brake movable end centrifugal force axial endplay at clutch plate (3) back side.
7. the synchronous noncontact transmission of disc type according to claim 1 permanent magnet clutch; it is characterized in that: described bipolarly be arranged on clutch plate (3) the card outer shroud apart from spacing hole (12), driving disc spacing pressing (2) card outer shroud corresponding position with it arrange overload and skid and namely instruct outage to shut down the wireless limit sensors of brake interlock protection above two pole spans of kicker magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320053894 CN203056818U (en) | 2013-01-31 | 2013-01-31 | Disc type synchronous non-contact transmission permanent magnet shaft coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320053894 CN203056818U (en) | 2013-01-31 | 2013-01-31 | Disc type synchronous non-contact transmission permanent magnet shaft coupling |
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| Publication Number | Publication Date |
|---|---|
| CN203056818U true CN203056818U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320053894 Expired - Fee Related CN203056818U (en) | 2013-01-31 | 2013-01-31 | Disc type synchronous non-contact transmission permanent magnet shaft coupling |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015089757A1 (en) * | 2013-12-18 | 2015-06-25 | 麦远超 | Double-sided permanent magnet disk |
| CN104748385A (en) * | 2013-12-30 | 2015-07-01 | 王刚 | Strong magnetic inner rotor suit type multi-mouse-cage cyclonal self-electricity-generation multifunctional heater |
| CN105099126A (en) * | 2015-08-04 | 2015-11-25 | 合肥精大仪表股份有限公司 | Magnetic shaft coupling |
| CN107040106A (en) * | 2017-06-02 | 2017-08-11 | 中国科学院工程热物理研究所 | A kind of high-speed permanent magnetic disc type electric machine |
| CN107659116A (en) * | 2016-07-23 | 2018-02-02 | 李启飞 | Very big load regulatable magnetic force retarder |
-
2013
- 2013-01-31 CN CN 201320053894 patent/CN203056818U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015089757A1 (en) * | 2013-12-18 | 2015-06-25 | 麦远超 | Double-sided permanent magnet disk |
| CN104748385A (en) * | 2013-12-30 | 2015-07-01 | 王刚 | Strong magnetic inner rotor suit type multi-mouse-cage cyclonal self-electricity-generation multifunctional heater |
| CN104748385B (en) * | 2013-12-30 | 2017-10-31 | 王刚 | The many mouse cage eddy flow generating multifunctional self heaters of strong magnetic internal rotor sleeve type |
| CN105099126A (en) * | 2015-08-04 | 2015-11-25 | 合肥精大仪表股份有限公司 | Magnetic shaft coupling |
| CN107659116A (en) * | 2016-07-23 | 2018-02-02 | 李启飞 | Very big load regulatable magnetic force retarder |
| CN107040106A (en) * | 2017-06-02 | 2017-08-11 | 中国科学院工程热物理研究所 | A kind of high-speed permanent magnetic disc type electric machine |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20160131 |
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| EXPY | Termination of patent right or utility model |