CN103023241A

CN103023241A - Interaxial permanent magnet coupling mechanism

Info

Publication number: CN103023241A
Application number: CN2012104865694A
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: 2013-04-03

Abstract

The invention relates to an interaxial permanent magnet coupling mechanism for transmitting torque between two rotating shafts. The interaxial permanent magnet coupling mechanism comprises a permanent magnet rotor and a conductor rotor which are arranged coaxially, wherein permanent magnets and conductors are respectively distributed on the permanent magnet rotor and the conductor rotor; the permanent magnet rotor comprises an outer cylinder with a larger diameter and an inner cylinder with a smaller diameter, and the permanent magnets are respectively distributed on the inner side of the outer cylinder and the outer side of the inner cylinder; the conductor rotor comprises an intermediate cylinder between the inner cylinder and the outer cylinder, and conductors are distributed on the intermediate cylinder; the permanent magnets on the permanent magnet rotor are distributed along the circumference, and a magnetizer made of a permeability magnetic material is arranged between the adjacent permanent magnets; and the magnetic pole direction of each permanent magnet is positioned in the circumferential direction of the permanent magnet rotor, and the magnetic pole directions of the adjacent permanent magnets are opposite or reverse. The interaxial permanent magnet coupling mechanism disclosed by the invention can be used for transferring larger torque and adjusting the transferred torque and is compact in structure, low in requirement in installation precision and 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, aging easily, 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; Described p-m rotor includes the larger outer cylinder body of diameter and the less inner barrel of diameter, and outer cylinder body inboard and the inner barrel outside are distributed with permanent magnet; Described conductor rotor comprises the middle cylindrical shell between inner barrel and outer cylinder body, is distributed with conductor on the middle cylindrical shell, and the inside and outside both sides of middle cylindrical shell all form 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 p-m rotor and conductor rotor.

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, make permanent magnetic field can more concentrate on acting surface between permanent magnet and the conductor, 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 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, have eliminated 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 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 p-m rotor 1 and the conductor rotor 2 of coaxial setting, is distributed with respectively permanent magnet 13 and conductor 22 on p-m rotor 1 and the conductor rotor 2, has air gap 3 between p-m rotor 1 and the conductor rotor 2; Described p-m rotor includes diameter larger outer cylinder body 11 and the less inner barrel 12 of diameter, and outer cylinder body inboard and the inner barrel outside are distributed with permanent magnet 13; Described conductor rotor 2 comprises the middle cylindrical shell 21 between inner barrel and outer cylinder body, is distributed with conductor 22 on the middle cylindrical shell, and the inside and outside both sides of middle cylindrical shell all form air gap 3; Permanent magnet 13 on the p-m rotor circumferentially is mounted with the magnetic conductor 14 of being made by permeability magnetic material between adjacent permanent magnet 13; The pole orientation of permanent magnet 13 (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 13 in opposite directions or opposing.

This mechanism also includes the adjusting device 4 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 can adopt various general mechanical structures to realize, but manual adjustment also can be regulated automatically.

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 (13) and conductor (22) 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: described p-m rotor includes the larger outer cylinder body of diameter (11) and the less inner barrel (12) of diameter, and outer cylinder body inboard and the inner barrel outside are distributed with permanent magnet (13); Described conductor rotor (2) comprises the middle cylindrical shell (21) between inner barrel and outer cylinder body, is distributed with conductor (22) on the middle cylindrical shell, and the inside and outside both sides of middle cylindrical shell all form air gap (3); Permanent magnet on the p-m rotor (13) circumferentially is mounted with the magnetic conductor (14) of being made by permeability magnetic material between adjacent permanent magnet (13); The pole orientation of described permanent magnet (13) is positioned on the circumferencial direction of p-m rotor (1), 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 (4) of the relative axial position that can change p-m rotor (1) and conductor rotor (2).