CN102916561A

CN102916561A - Inter-shaft permanent magnet coupling mechanism

Info

Publication number: CN102916561A
Application number: CN2012104866752A
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
Anticipated expiration: 2032-11-27
Also published as: CN102916561B

Abstract

The invention relates to an inter-shaft permanent magnet coupling mechanism used for transmitting torque between two rotating shafts. The mechanism comprises two coaxial permanent magnet rotors in disk structures, wherein permanent magnets 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 a gap, of each magnetizer; the magnetic pole directions of the main magnets are positioned on the circumferential directions of the permanent magnet rotors, and the magnetic pole directions of adjacent main magnets are opposite or reverse; the magnetic pole directions of the auxiliary magnets are vertical to the end faces 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 adjacent main magnets and one auxiliary magnet are in contact with the same magnetizer have the same polarity. The mechanism can transmit larger torque, can adjust the transmitted torque, has compact structure and low requirement for installation precision, 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 two p-m rotor acting surface places 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 two p-m rotors of coaxial setting, is distributed with respectively permanent magnet on two p-m rotors; Two p-m rotors are disc structure and the front end face is relative, form air gap; 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 on the p-m rotor end face, be provided with an auxiliary magnet in the side away from air gap 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 is perpendicular to the end face of p-m rotor, 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 of the relative axial position that can change two p-m rotors.

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 opposing end surface of two p-m rotors more, make the magnetic circuit gap produce stronger permanent magnetic field (high magnetic flux density can reach more than the 2000mT), thereby can under less volume, transmit larger moment of torsion; By adjusting device the relative axial position of two p-m rotors is regulated, can be changed the operating distance of two p-m rotors, thereby can obtain adjustable output torque and rotational speed; Two p-m rotors can be realized the power non contact transmission by the magnetic fields transmitting torque, eliminate vibration, and can allow the larger error of centralization, have reduced equipment precision requirement and installation difficulty, can also protect equipment when apparatus overload, realize soft start function.

Description of drawings

Fig. 1 is the p-m rotor end face structure schematic diagram of the embodiment of the invention;

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

Embodiment

As shown in the figure, between centers permanent magnet coupling of the present invention mechanism includes on 1, two p-m rotor 1 of two p-m rotors of coaxial setting and is distributed with respectively permanent magnet; Two p-m rotors 1 are disc structure and the front end face is relative, form air gap 3; Permanent magnet on the p-m rotor 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 on the p-m rotor end face, be provided with an auxiliary magnet 5 in the side away from air gap of each magnetic conductor 6; The pole orientation of 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 1, and the pole orientation of adjacent main magnet in opposite directions or opposing; The pole orientation of described auxiliary magnet 5 is perpendicular to the end face of p-m rotor 1, 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 by the relative axial position that changes two p-m rotors 1 air gap.Adjusting device can adopt various general mechanical structures to realize, but manual adjustment also can be regulated automatically.

Claims

1. between centers permanent magnet coupling mechanism, it is characterized in that: it includes two p-m rotors (1) of coaxial setting, is distributed with respectively permanent magnet on two p-m rotors (1); Two p-m rotors (1) are disc structure and the front end face is relative, form air gap (3); Permanent magnet on the p-m rotor 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 on the p-m rotor end face, be provided with an auxiliary magnet (5) in the side away from air gap of each magnetic conductor (6); The pole orientation of main magnet (4) is positioned on the circumferencial direction of p-m rotor (1), and the pole orientation of adjacent main magnet in opposite directions or opposing; The pole orientation of described auxiliary magnet (5) is perpendicular to the end face of p-m rotor (1), 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 two p-m rotors (1).