CN203014641U

CN203014641U - Inter-shaft permanent magnetic coupling mechanism

Info

Publication number: CN203014641U
Application number: CN 201220631447
Authority: CN
Inventors: 徐俊峰
Original assignee: ZHENJIANG JIANGNAN MINING MACHINERY AND ELECTRICAL EQUIPMENT CO Ltd
Current assignee: Jiangsu Magnet Valley Technologies Co ltd
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-06-19
Anticipated expiration: 2022-11-27

Abstract

The utility model relates to an inter-shaft permanent magnetic coupling mechanism for transmitting torque between two rotating shafts. The mechanism comprises a p-m rotor and a conductor rotor, which are coaxially arranged and respectively provided with permanent magnets and conductors, wherein the p-m rotor comprises an outer cylindrical shell with a larger diameter and an inner cylindrical shell with a small diameter, and permanent magnets are uniformly distributed on the inner side of the outer cylindrical shell and outer side of the inner cylindrical shell. The conductor rotor comprises an intermediate cylindrical shell arranged between the inner cylindrical shell and the outer cylindrical shell, and conductors are distributed on the intermediate cylindrical shell. The permanent magnets on the p-m rotor are distributed circumferentially, and magnetizers made of magnetic conductive materials are arranged between adjacent permanent magnets. The magnetic pole directions of the permanent magnets are on the circumferential direction of p-m rotor, and the magnetic pole directions of two adjacent permanent magnets are face-to-face or back-to-back. The inter-shaft permanent magnetic coupling mechanism enables transmission of relative large torque and adjustment of torque transmission. The inter-shaft permanent magnetic coupling mechanism is compact in structure, low in installation precision requirements, and stable and reliable in transmission and adjustment.

Description

Between centers permanent magnet coupling mechanism

Technical field

The utility model 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 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 unadjustable.Because running situation is complicated and changeable, be difficult to accurately guarantee diaxon centering, equipment all can produce vibration after operation a period of time, thus equipment life is shortened in accelerated wear test.

2, current frequency control is widely used in industry spot, controls output speed by controlling 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 for working in rugged environment.

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 arranged on 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, due to the electromagnetic action between permanent magnetic field and conductor, make the moment that between conductor rotor and p-m rotor, generation is coupled both, reach the purpose of moment of torsion output; By regulating the effect air gap between conductor rotor and 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 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 in the utility model is, mechanism improves to existing permanent magnet coupling, 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 low, transmission and adjusting steadily between centers permanent magnet coupling mechanism reliably.

Between centers permanent magnet coupling of the present utility model 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 conductor rotor, has air gap between p-m rotor and conductor rotor; Described p-m rotor includes the larger outer cylinder body of diameter and the less inner barrel of diameter, is distributed with permanent magnet outside outer cylinder body inboard and inner barrel; Described conductor rotor comprises the middle cylindrical shell between inner barrel and outer cylinder body, is distributed with conductor on middle cylindrical shell, and middle cylindrical shell inside and outside both sides all form air gap; Permanent magnet on 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 utility model 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 conductor, make the magnetic circuit gap produce stronger permanent magnetic field (high magnetic flux density can reach 1500mT more than), thereby can transmit larger moment of torsion under less volume; 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, can also protect equipment when apparatus overload, realized soft start function.

Description of drawings

Fig. 1 is the cross section structure schematic diagram of the utility model embodiment;

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

Embodiment

As shown in the figure, between centers permanent magnet coupling of the present utility model 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 conductor rotor 2, has air gap 3 between p-m rotor 1 and conductor rotor 2; Described p-m rotor includes diameter larger outer cylinder body 11 and the less inner barrel 12 of diameter, is distributed with permanent magnet 13 outside outer cylinder body inboard and inner barrel; Described conductor rotor 2 comprises the middle cylindrical shell 21 between inner barrel and outer cylinder body, is distributed with conductor 22 on middle cylindrical shell, and middle cylindrical shell inside and outside both sides all form air gap 3; Permanent magnet 13 on 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 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 conductor rotor (2), have air gap (3) between p-m rotor (1) and 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, is distributed with permanent magnet (13) outside outer cylinder body inboard and inner barrel; Described conductor rotor (2) comprises the middle cylindrical shell (21) between inner barrel and outer cylinder body, is distributed with conductor (22) on middle cylindrical shell, and middle cylindrical shell inside and outside both sides all form air gap (3); Permanent magnet on 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).