CN102931808A

CN102931808A - Interaxial permanent magnet coupling mechanism

Info

Publication number: CN102931808A
Application number: CN2012104865707A
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: 2013-02-13

Abstract

The invention relates to a mechanism transmission device, in particular to an interaxial permanent magnet coupling mechanism used for transmitting torque between two axes of rotation. The mechanism comprises two coaxially arranged permanent magnet rotors of disc structure, wherein permanent magnets are distributed on the end faces of the two permanent magnet rotors respectively; the end faces of the permanent magnet rotors are opposite and form an air gap; the permanent magnets on the permanent magnet rotors are distributed along the circumference; magnetizers made of permeability magnetic materials are put between the adjacent permanent magnets; the magnetic pole directions of the permanent magnets are in the circumferential directions of the permanent magnet rotors; and the magnetic pole directions of the adjacent permanent magnets are opposite or reverse. The mechanism can transmit bigger 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 the p-m rotor of two disc structures of coaxial setting, is distributed with respectively permanent magnet on two p-m rotor end faces; The end face of two p-m rotors is relative, forms air gap; 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 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, permanent magnet and auxiliary magnet position are cooperatively interacted, permanent magnetic field can concentrate on the end face 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 1500mT), 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 two operating distances between p-m rotor, 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 end face of p-m rotor of two disc structures of coaxial setting and is distributed with respectively permanent magnet 2; The end face of two p-m rotors 1 is relative, forms air gap 3; Permanent magnet 2 on the p-m rotor circumferentially is mounted with the magnetic conductor 4 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 5 that can regulate by the relative axial position that changes two p-m rotors 1 air gap between two p-m rotors.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 includes the p-m rotor (1) of two disc structures of coaxial setting, it is characterized in that: be distributed with respectively permanent magnet (2) on two p-m rotors (1) end face; The end face of two p-m rotors (1) is relative, forms air gap (3); Permanent magnet on the p-m rotor (2) circumferentially is mounted with the magnetic conductor (4) of being made by permeability magnetic material between adjacent permanent magnet; The pole orientation of described permanent magnet (1) is positioned on the circumferencial direction of p-m rotor, and the pole orientation of adjacent permanent magnet in opposite directions or opposing.

2. between centers permanent magnet coupling according to claim 1 mechanism, it is characterized in that: this mechanism also includes the adjusting device (5) of the relative axial position that can change two p-m rotors (1).