CN103312120A

CN103312120A - Permanent-magnet coupling mechanism between shafts

Info

Publication number: CN103312120A
Application number: CN2013102444888A
Authority: CN
Inventors: 徐俊峰
Original assignee: ZHENJIANG JIANGNAN MINING MACHINERY AND ELECTRICAL EQUIPMENT CO Ltd
Current assignee: ZHENJIANG JIANGNAN MINING MACHINERY AND ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2013-06-20
Filing date: 2013-06-20
Publication date: 2013-09-18

Abstract

The invention relates to a mechanism transmission device, in particular to a permanent-magnet coupling mechanism between shafts. The permanent-magnet coupling mechanism is used for transmitting torque between two rotation shafts and comprises a permanent-magnet rotor and a conductor rotor which are arranged coaxially. Permanent-magnets and conductors are respectively distributed on the permanent-magnet rotor and the conductor rotor, and a conical air gap is formed between the permanent-magnet rotor and the conductor rotor. The permanent-magnets on the permanent-magnet rotor are distributed circumferentially, and magnetizers made of magnetic materials are mounted between the adjacent permanent-magnets. Directions of magnetic poles of the permanent-magnets extend along the circumference of the permanent-magnet rotor, and directions of the magnetic poles of the adjacent permanent-magnets are opposite or reversed. The permanent-magnet coupling mechanism is capable of transmitting high torque adjustably, and is compact in structure, convenient to mount and stable and reliable in transmission and adjustment.

Description

Between centers permanent magnetism coupling mechanism

Technical field

The present invention relates to a kind of mechanism driving device, specifically is a kind of for the between centers permanent magnetism coupling mechanism that transmits moment of torsion between two rotating shafts.

Background technology

Output and adjustment for moment of torsion have multiple mode in the prior art, specifically comprise:

1, present industry-wide coupling body, these mechanisms mostly are rigidity or hydraulic pressure and are of coupled connections etc., and transmit moment of torsion and rotating speed unadjustable.Because running situation is complicated and changeable, is difficult to accurately guarantee diaxon centering, equipment all can produce vibration after operation a period of time, thereby equipment life is shortened in accelerated wear test.

2, current frequency control is widely used in the industry spot, controls output speed, the price comparison costliness by the control motor, structure and complicated operation, the power electronic device of frequency converter is operated on off state, thereby produces a large amount of harmonic waves, pollute electrical network, influence communication, and electronic device stability is bad, aging easily, useful life is not long, and higher to environment requirement, ambient temperature and humidity and dust there are very big requirement, be not suitable in rugged environment, working.

3, at present existingly be used for the permanent magnetism coupling mechanism that permanent magnetic speed-adjusting drives, its basic structure is: the conductor rotor and the p-m rotor that are installed on the rotation axis separately are set, and conductor rotor is with the coaxial setting of p-m rotor and maintain air gap; In the course of work, when conductor rotor and p-m rotor relatively rotate, then because the electromagnetic action between permanent magnetic field and the conductor makes the moment that generations is coupled both between conductor rotor and the p-m rotor, reach the purpose that moment of torsion is exported; By regulating the effect air gap between conductor rotor and the p-m rotor, can obtain adjustable load torque and rotating speed, reach the purpose of speed governing.This class coupler of existing structure, magnetic direction in its circumferential permanent magnet is normally perpendicular to the magnetic field acting surface between conductor rotor and the p-m rotor, its Distribution of Magnetic Field loose and also intensity not high (high magnetic flux density can only reach 400 ~ 500mT), if the bigger moment of torsion of transmission, what need that bar structure does is bigger, has limited the popularization of this technology.

Summary of the invention

Technical problem to be solved by this invention is, existing permanent magnetism coupling mechanism is improved, provide a kind of Distribution of Magnetic Field to concentrate, the magnetic flux density at conductor rotor and p-m rotor acting surface place is big, can transmit than high pulling torque, can regulate transmitting moment of torsion, and compact conformation, installation accuracy be required steadily between centers permanent magnetism coupling mechanism reliably of low, transmission and adjusting.

Between centers permanent magnetism coupling mechanism of the present invention includes p-m rotor and the conductor rotor of coaxial setting, is distributed with permanent magnet and conductor on p-m rotor and the conductor rotor respectively, has conical air gap between p-m rotor and the conductor rotor; Permanent magnet on the p-m rotor circumferentially is mounted with the magnetic conductor of being made by permeability magnetic material between adjacent permanent magnet; The pole orientation of described permanent magnet (being the line direction of the S utmost point and the N utmost point) is positioned on the circumferencial direction of p-m rotor, and the pole orientation of adjacent permanent magnet in opposite directions or opposing.

This mechanism also includes the adjusting device that can regulate active area and width of air gap between p-m rotor and the conductor rotor by the relative axial position that changes p-m rotor and conductor rotor.

On the said structure basis, the first string of the present invention is: p-m rotor is positioned at the conductor rotor periphery, and described permanent magnet and magnetic conductor are positioned on the internal conical surface of p-m rotor, and described conductor is positioned on the outer conical surface of conductor rotor.

On the said structure basis, second scheme of the present invention is: conductor rotor is positioned at the p-m rotor periphery, and described permanent magnet and magnetic conductor are positioned on the outer conical surface of p-m rotor, and described conductor is positioned on the internal conical surface of conductor rotor.

The present invention adopts the structural principle of permanent magnetism coupling speed governing, magnetic structure to p-m rotor carries out creationary optimization, by a kind of magnetic architecture of novel permanent magnetic field is provided, make permanent magnetic field can concentrate on acting surface between permanent magnet and the conductor more, make the magnetic circuit gap produce higher permanent magnetic field (high magnetic flux density can reach more than the 1000mT), thereby can under smaller volume, transmit bigger moment of torsion; By adjusting device the relative axial position of p-m rotor and conductor rotor is regulated, active area and width of air gap between p-m rotor and conductor rotor can be changed simultaneously, thereby axial dimension and the transmission stability of whole device can be when regulating output torque and rotating speed, taken into account; Traditional relatively tube worker permanent-magnet speed governor, it can reduce to regulate displacement, makes compact conformation; Big with respect to vibration between the power shaft of traditional desk permanent-magnet speed regulator and the bearing axle, to the very high defective of the concentricity requirement between power shaft and the bearing axle, the permanent-magnet speed governor of cone-shaped structure of the present invention can reduce vibration, again concentricity requirement between power shaft and the bearing axle is reduced, the scope of application is wider.

Description of drawings

Fig. 1 is the cross section structure schematic diagram of first embodiment of the invention;

Fig. 2 is the vertical section structure schematic diagram of first embodiment of the invention;

Fig. 3 is the cross section structure schematic diagram of second embodiment of the invention;

Fig. 4 is the vertical section structure schematic diagram of second embodiment of the invention;

Embodiment

As shown in the figure, between centers permanent magnetism coupling mechanism of the present invention includes p-m rotor 1 and the conductor rotor 2 of coaxial setting, be distributed with permanent magnet 4 and conductor 3 on p-m rotor 1 and the conductor rotor 2 respectively, have conical air gap 5 between p-m rotor 1 and the conductor rotor 2; A plurality of permanent magnets 4 circumferentially are mounted with the magnetic conductor of being made by permeability magnetic material 6 between adjacent permanent magnet 4; The pole orientation of described permanent magnet 4 (being the line direction of the S utmost point and the N utmost point) is positioned on the circumferencial direction of p-m rotor 1, and the pole orientation of adjacent permanent magnet 4 (representing with the direction of arrow in the accompanying drawing) in opposite directions or opposing.

This mechanism also includes the adjusting device 7 that can regulate active area and width of air gap between p-m rotor and the conductor rotor by the relative axial position that changes p-m rotor 1 and conductor rotor 2.Adjusting device can adopt various general mechanical structures to realize, but manual adjustment also can be regulated automatically.

In Fig. 1, embodiment shown in Figure 2, p-m rotor 1 is positioned at conductor rotor 2 peripheries, and described permanent magnet 4 and magnetic conductor 6 are positioned on the internal conical surface of p-m rotor, and described conductor 3 is positioned on the outer conical surface of conductor rotor.

In Fig. 3, embodiment shown in Figure 4, conductor rotor 2 is positioned at p-m rotor 1 periphery, and described permanent magnet 4 and magnetic conductor 6 are positioned on the outer conical surface of p-m rotor, and described conductor 3 is positioned on the internal conical surface of conductor rotor.

Claims

1. between centers permanent magnetism coupling mechanism, include p-m rotor (1) and the conductor rotor (2) of coaxial setting, be distributed with permanent magnet (4) and conductor (3) on p-m rotor (1) and the conductor rotor (2) respectively, it is characterized in that: have conical air gap (5) between p-m rotor (1) and the conductor rotor (2); A plurality of permanent magnets (4) circumferentially are mounted with the magnetic conductor of being made by permeability magnetic material (6) between adjacent permanent magnet (4); The pole orientation of described permanent magnet (4) is positioned on the circumferencial direction of p-m rotor (1), and the pole orientation of adjacent permanent magnet (4) in opposite directions or opposing.

2. between centers permanent magnetism coupling mechanism according to claim 1, it is characterized in that: this mechanism also includes the adjusting device (7) of the relative axial position that can change p-m rotor (1) and conductor rotor (2).

3. between centers permanent magnetism coupling mechanism according to claim 1 and 2, it is characterized in that: p-m rotor (1) is positioned at conductor rotor (2) periphery, described permanent magnet (4) and magnetic conductor (6) are positioned on the internal conical surface of p-m rotor, and described conductor (3) is positioned on the outer conical surface of conductor rotor.

4. between centers permanent magnetism coupling mechanism according to claim 1 and 2, it is characterized in that: conductor rotor (2) is positioned at p-m rotor (1) periphery, described permanent magnet (4) and magnetic conductor (6) are positioned on the outer conical surface of p-m rotor, and described conductor (3) is positioned on the internal conical surface of conductor rotor.