CN102916562A

CN102916562A - Inter-shaft permanent magnet coupling mechanism

Info

Publication number: CN102916562A
Application number: CN2012104867168A
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: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-02-06

Abstract

The invention relates to an inter-shaft permanent magnet coupling mechanism used for transmitting torque between two rotating shafts. The mechanism comprises a permanent magnet rotor and a conductor rotor which are arranged coaxially, wherein permanent magnets on the permanent magnet rotor comprise main magnets and auxiliary magnets; a plurality of main magnets are distributed along the circumference, magnetizers made of permeability magnetic materials are put between adjacent main magnets, and one auxiliary magnet is arranged on the side, far from the conductor rotor, of each magnetizer; the magnetic pole directions of the main magnets are positioned on the circumferential directions of the permanent magnet rotor, and the magnetic pole directions of adjacent main magnets are opposite or reverse; the magnetic pole directions of the auxiliary magnets are the radial directions of the permanent magnet rotors, and the magnetic pole directions of adjacent auxiliary magnets are opposite; and the magnetic poles on the sides on which two main magnets and one auxiliary magnet are in contact with the same magnetizer have the same polarity. The mechanism can transmit large torque, can adjust the transmitted torque, has a compact structure, is convenient to install, and is stable and reliable in transmission and adjustment.

Description

Between centers permanent magnet coupling mechanism

Technical field

The present invention relates to a kind of mechanism transmission device, specifically a kind of between centers permanent magnet coupling mechanism for transmitting torque between two rotating shafts.

Background technology

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

1, present industry-wide coupling body, these mechanisms mostly are rigidity or Hydraulic coupling connection etc., and transmitting torque and rotating speed are 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 by the control motor, and price comparison is expensive, 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, affect communication, and electronic device stability is bad, easily aging, useful life is not long, and to having relatively high expectations of environment, ambient temperature and humidity and dust there are very large requirement, are not suitable in rugged environment, working.

3, at present existingly be used for the permanent magnet 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 fields face between conductor rotor and the p-m rotor, its Distribution of Magnetic Field is loose and intensity is not high, and (high magnetic flux density can only reach 400 ~ 500mT), if the larger moment of torsion of transmission, what need that bar structure does is larger, has limited the popularization of this technology.

Summary of the invention

Technical problem to be solved by this invention is, existing permanent magnet 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 large, can transmit than high pulling torque, can regulate transmitting torque, and compact conformation, installation accuracy be required steadily reliable between centers permanent magnet coupling mechanism of low, transmission and adjusting.

Between centers permanent magnet coupling of the present invention mechanism includes p-m rotor and the conductor rotor of coaxial setting, is distributed with respectively permanent magnet and conductor on p-m rotor and the conductor rotor, has air gap between p-m rotor and the conductor rotor; Permanent magnet on the p-m rotor includes main magnet and auxiliary magnet; A plurality of main magnets circumferentially are mounted with the magnetic conductor of being made by permeability magnetic material between adjacent main magnet, be provided with an auxiliary magnet in the side away from conductor rotor of each magnetic conductor; The pole orientation of described main 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 main magnet in opposite directions or opposing; The pole orientation of described auxiliary magnet be p-m rotor radially, and the pole orientation of adjacent auxiliary magnet is opposite; And, two main magnets and an auxiliary magnet adjacent with each magnetic conductor, place, the side magnetic pole that they contact with same magnetic conductor is same polarity.

This mechanism also includes the adjusting device that can regulate active area 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, a scheme of the present invention is: p-m rotor is drum, the coaxial p-m rotor inner chamber that is arranged in of conductor rotor, and main magnet is positioned at the p-m rotor medial surface, and auxiliary magnet is positioned at the outside of magnetic conductor.

On the said structure basis, another scheme of the present invention is: conductor rotor is drum, the coaxial conductor rotor inner chamber that is arranged in of p-m rotor, and main magnet is positioned at the p-m rotor lateral surface, and auxiliary magnet is positioned at the inboard of magnetic conductor.

The present invention adopts the structural principle of permanent magnet 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, main magnet and auxiliary magnet position are cooperatively interacted, permanent magnetic field can concentrate on the acting surface between permanent magnetism 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 less volume, transmit larger moment of torsion; By adjusting device the relative axial position of p-m rotor and conductor rotor is regulated, can be changed the active area between p-m rotor and conductor rotor, thereby can obtain adjustable output torque and rotational speed; P-m rotor and conductor rotor can realize the power non contact transmission by the magnetic fields transmitting torque, eliminate vibration; and can allow the larger error of centralization; reduce equipment precision requirement and installation difficulty, when apparatus overload, can also protect equipment, realized soft start function.

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 magnet coupling of the present invention mechanism includes p-m rotor 1 and the conductor rotor 2 of coaxial setting, is distributed with respectively permanent magnet and conductor on p-m rotor 1 and the conductor rotor 2, has air gap 3 between p-m rotor 1 and the conductor rotor 2; Permanent magnet on the p-m rotor 1 includes main magnet 4 and auxiliary magnet 5; A plurality of main magnets 4 circumferentially are mounted with the magnetic conductor 6 of being made by permeability magnetic material between adjacent main magnet 4; Described auxiliary magnet 5 is positioned at the side away from conductor rotor 2 of each magnetic conductor 6; The pole orientation of described main 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, and the pole orientation of adjacent main magnet 4 (representing with the direction of arrow in the accompanying drawing) in opposite directions or opposing; The pole orientation of auxiliary magnet 5 be p-m rotor radially, and the pole orientation of adjacent auxiliary magnet 5 is opposite; And, two main magnets 4 and an auxiliary magnet 5 adjacent with each magnetic conductor 6, place, the side magnetic pole that they contact with same magnetic conductor 6 is same polarity.

This mechanism also includes the adjusting device 7 that can regulate 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 7 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 drum, the conductor rotor 2 coaxial p-m rotor inner chambers that are arranged in, and main magnet 4 is positioned at p-m rotor 1 medial surface, and auxiliary magnet 5 is positioned at the outside of magnetic conductor 6.

In Fig. 3, embodiment shown in Figure 4, conductor rotor 2 is drum, the p-m rotor 1 coaxial conductor rotor inner chamber that is arranged in, and main magnet 4 is positioned at p-m rotor 1 lateral surface, and auxiliary magnet 5 is positioned at the inboard of magnetic conductor 6.

Claims

1. between centers permanent magnet coupling mechanism, include p-m rotor (1) and the conductor rotor (2) of coaxial setting, be distributed with respectively permanent magnet and conductor on p-m rotor (1) and the conductor rotor (2), have air gap (3) between p-m rotor (1) and the conductor rotor (2); It is characterized in that: the permanent magnet on the described p-m rotor (1) includes main magnet (4) and auxiliary magnet (5); A plurality of main magnets (4) circumferentially are mounted with the magnetic conductor (6) of being made by permeability magnetic material between adjacent main magnet (4); The side away from conductor rotor (2) at each magnetic conductor (6) is provided with an auxiliary magnet (5); The pole orientation of described main magnet (4) is positioned on the circumferencial direction of p-m rotor, and the pole orientation of adjacent main magnet (4) in opposite directions or opposing; The pole orientation of auxiliary magnet (5) be p-m rotor radially, and the pole orientation of adjacent auxiliary magnet (5) is opposite; And, two the main magnets (4) adjacent with each magnetic conductor (6) and an auxiliary magnet (5), place, the side magnetic pole that they contact with same magnetic conductor (6) is same polarity.

2. between centers permanent magnet coupling according to claim 1 mechanism, 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 magnet coupling according to claim 1 and 2 mechanism, it is characterized in that: p-m rotor (1) is drum, the coaxial p-m rotor inner chamber that is arranged in of conductor rotor (2), main magnet (4) is positioned at p-m rotor (1) medial surface, and auxiliary magnet (5) is positioned at the outside of magnetic conductor (6).

4. between centers permanent magnet coupling according to claim 1 and 2 mechanism, it is characterized in that: conductor rotor (2) is drum, the coaxial conductor rotor inner chamber that is arranged in of p-m rotor (1), main magnet (4) is positioned at p-m rotor (1) lateral surface, and auxiliary magnet (5) is positioned at the inboard of magnetic conductor (6).