阅读说明：本技术 一种轴向永磁涡流联轴器 (Axial permanent magnet eddy current coupling ) 是由 陈克鑫 闫泽 曲盛楠 战庆欣 王学志 戴维泽 张祥 王春玲 于 2020-06-11 设计创作，主要内容包括：一种轴向永磁涡流联轴器,涉及磁力传动领域,特别涉及永磁涡流联轴器领域。解决了现有轴向永磁涡流联轴器的磁路传扭能力低的问题。本发明两个永磁体转子的外侧壁通过连接件固定连接；两个永磁体转子的气隙侧均沿周向均匀设置多个永磁体,同一个永磁体转子上的相邻的两个永磁体的充磁方向相反,且两个永磁体转子上相对设置的永磁体的气隙侧充磁方向相反；两个永磁体转子上的永磁体的充磁方向均为轴向充磁；驱动端连接法兰的一个端面穿过一个永磁体转子固定在导体转子上,且该永磁体转子与驱动端连接法兰间存在间隙,驱动端连接法兰的另一个端面用于与外部驱动设备固定连接；负载端连接法兰的一个端面固定在另一个永磁体转子上。主要用于进行传动。(An axial permanent magnet eddy current coupling relates to the field of magnetic transmission, in particular to the field of permanent magnet eddy current couplings. The problem of current axial permanent magnetism eddy current coupling's magnetic circuit transmit the ability to turn round low is solved. The outer side walls of the two permanent magnet rotors are fixedly connected through a connecting piece; the air gap sides of the two permanent magnet rotors are uniformly provided with a plurality of permanent magnets along the circumferential direction, the magnetizing directions of two adjacent permanent magnets on the same permanent magnet rotor are opposite, and the magnetizing directions of the air gap sides of the permanent magnets oppositely arranged on the two permanent magnet rotors are opposite; the magnetizing directions of the permanent magnets on the two permanent magnet rotors are axial magnetizing; one end face of the driving end connecting flange penetrates through a permanent magnet rotor to be fixed on the conductor rotor, a gap exists between the permanent magnet rotor and the driving end connecting flange, and the other end face of the driving end connecting flange is used for being fixedly connected with external driving equipment; one end face of the load end connecting flange is fixed on the other permanent magnet rotor. The transmission is mainly used for transmission.)

1. An axial permanent magnet eddy current coupling is characterized by comprising a driving end connecting flange (1), a load end connecting flange (2), two permanent magnet rotors (3), a conductor rotor (4) and a connecting piece (5); the two permanent magnet rotors (3) and the conductor rotor (4) are coaxially arranged, the conductor rotor (4) is positioned between the two permanent magnet rotors (3), and air gaps exist between the two permanent magnet rotors (3) and the conductor rotor (4);

the two permanent magnet rotors (3) and the conductor rotor (4) are both in circular structures; the outer side walls of the two permanent magnet rotors (3) are fixedly connected through a connecting piece (5);

a plurality of permanent magnets (3-1) are uniformly arranged on the air gap sides of the two permanent magnet rotors (3) along the circumferential direction, and the permanent magnets (3-1) on the two permanent magnet rotors (3) are axially magnetized;

the magnetizing directions of two adjacent permanent magnets (3-1) on the same permanent magnet rotor (3) are opposite, and the magnetic pole directions of the air gap sides of the permanent magnets (3-1) oppositely arranged on the two permanent magnet rotors (3) are opposite;

one end face of the driving end connecting flange (1) penetrates through a permanent magnet rotor (3) to be fixed on the conductor rotor (4), a gap exists between the permanent magnet rotor (3) and the driving end connecting flange (1), and the other end face of the driving end connecting flange (1) is used for being fixedly connected with external driving equipment;

one end face of the load end connecting flange (2) is fixed on the other permanent magnet rotor (3).

2. The axial permanent magnet eddy current coupling according to claim 1, characterized in that the eddy current coupling further comprises two mounting discs (6), the mounting discs (6) are of a circular ring structure and are arranged coaxially with the permanent magnet rotor (3);

the two mounting discs (6) are respectively fixed on the air gap sides of the two permanent magnet rotors (3), one end face of each mounting disc (6) is provided with a mounting groove, and the mounting groove faces to the permanent magnet rotor (3) where the mounting groove is located;

the permanent magnet (3-1) arranged on each permanent magnet rotor (3) is fixed in the mounting groove of the mounting disc (6) connected with the permanent magnet rotor (3), and the permanent magnet (3-1) is in contact with the corresponding permanent magnet rotor (3).

3. An axial permanent magnet eddy current coupling according to claim 1, characterised in that the connecting piece (5) is a connecting rod or a cylindrical structure.

4. An axial permanent magnet eddy current coupling according to claim 1, characterised in that the permanent magnets (3-1) are of a fan-shaped or rectangular configuration.

5. An axial permanent magnet eddy current coupling according to claim 1, characterised in that the air gap distance between the two permanent magnet rotors (3) and the conductor rotor (4) is the same.

Technical Field

The invention relates to the field of magnetic transmission, in particular to the field of permanent magnet eddy current couplings.

Background

Couplings are widely used as connecting devices in mechanical systems. Couplings used in the mechanical field at present are divided into mechanical couplings, hydraulic couplings and magnetic transmission couplings; the mechanical coupling transmits torque through mechanical coupling, additional force generated during working is relatively large, and the capability of isolating vibration is relatively weak; the hydraulic coupler transmits torque through the action between fluids, so that the transmission efficiency is reduced, the service life is short, and the workload of later maintenance is high; the magnetic transmission coupling transmits torque by utilizing the interaction between magnetic fields, belongs to non-contact torque transmission, and has the characteristics of vibration isolation, noise isolation, strong compensation capability on shaft system deviation and no maintenance; the permanent magnet eddy current coupling is a branch of a magnetic transmission coupling, a certain rotating speed difference can be formed on two sides of the coupling when the permanent magnet eddy current coupling works, and the coupling realizes the transmission of torque through the interaction between the permanent magnet disc and the induction magnetic field on the eddy current disc.

However, the current axial permanent magnet eddy current coupling mainly has two structures:

the permanent magnet discs and the conductor discs of the axial permanent magnet eddy current coupling are arranged in a one-to-one manner, the coupling is low in driving efficiency, low in magnetic torque power provided by unit volume and capable of generating additional axial force during working, and the axial permanent magnet eddy current coupling is only applied to some special occasions;

second, axial permanent magnetism eddy current coupling permanent magnetism dish and conductor dish are a pair of two to be arranged, and 1 permanent magnetism dish is located the centre of shaft coupling, and 2 eddy current dishes are located the both sides of permanent magnetism dish respectively, and the shaft coupling of this kind of structure is passed the torsion ability for the shaft coupling of first structure and is had certain promotion, nevertheless passes the torsion ability and still very low, consequently, above problem needs to be solved urgently.

Disclosure of Invention

The invention aims to solve the problem that the magnetic circuit torque transmission capacity of the existing axial permanent magnet eddy current coupling is low, and provides an axial permanent magnet eddy current coupling.

An axial permanent magnet eddy current coupling comprises a driving end connecting flange, a load end connecting flange, two permanent magnet rotors, a conductor rotor and a connecting piece; the conductor rotor is positioned between the two permanent magnet rotors, and air gaps are formed between the two permanent magnet rotors and the conductor rotor;

the two permanent magnet rotors and the conductor rotor are both in circular structures; the outer side walls of the two permanent magnet rotors are fixedly connected through a connecting piece;

the air gap sides of the two permanent magnet rotors are uniformly provided with a plurality of permanent magnets along the circumferential direction, and the magnetizing directions of the permanent magnets on the two permanent magnet rotors are axial magnetizing;

magnetizing directions of two adjacent permanent magnets on the same permanent magnet rotor are opposite, and magnetic poles on air gap sides of the permanent magnets oppositely arranged on the two permanent magnet rotors are opposite in direction;

one end face of the driving end connecting flange penetrates through a permanent magnet rotor to be fixed on the conductor rotor, a gap exists between the permanent magnet rotor and the driving end connecting flange, and the other end face of the driving end connecting flange is used for being fixedly connected with external driving equipment;

one end face of the load end connecting flange is fixed on the other permanent magnet rotor.

Preferably, the eddy current coupling further comprises two mounting discs, wherein each mounting disc is of a circular ring structure and is coaxially arranged with the permanent magnet rotor;

the two mounting discs are respectively fixed on the air gap sides of the two permanent magnet rotors, and one end face of each mounting disc is provided with a mounting groove facing the permanent magnet rotor;

the permanent magnet arranged on each permanent magnet rotor is fixed in the mounting groove of the mounting disc connected with the permanent magnet rotor, and the permanent magnet is in contact with the corresponding permanent magnet rotor.

Preferably, the connecting piece is a connecting rod or a cylindrical structure.

Preferably, the permanent magnet has a fan-shaped structure or a rectangular structure.

Preferably, the air gap spacing between the two permanent magnet rotors and the conductor rotor is the same.

The invention has the following beneficial effects: in the invention, 4 permanent magnets are formed by two adjacent permanent magnets on one permanent magnet rotor and two corresponding permanent magnets on the other permanent magnet rotor, and the 4 permanent magnets form a closed magnetic path.

The invention is realized by adopting two permanent magnet rotors and one conductor rotor, so that the magnetic resistance of the conductor rotor of the coupler is smaller, and the relative position relationship between the two permanent magnet rotors and the conductor rotor and the arrangement mode of the permanent magnets ensure that the magnetic force line trend in the magnetic circuit unit is favorable for the formation of induced eddy currents on the conductor rotor, the magnetic energy utilization rate of the permanent magnets is higher, and larger torque can be transmitted under the same radial space size, so that the torque transmission capacity of the magnetic circuit is improved.

Aiming at the permanent magnet eddy current coupler with high power and low rotating speed in the prior art, the axial permanent magnet eddy current coupler provided by the invention has a simple structure, has low requirement on the radial space of a used unit, and enables the arrangement of the applied unit to be more flexible.

Drawings

FIG. 1 is a schematic axial structural view of an axial permanent magnet eddy current coupling according to the present invention;

FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is a schematic diagram of a magnetic circuit formed by 4 permanent magnets on two permanent magnet rotors.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 to 4, the present embodiment is described, and an axial permanent magnet eddy current coupling according to the present embodiment includes a driving end connecting flange 1, a load end connecting flange 2, two permanent magnet rotors 3, a conductor rotor 4, and a connecting member 5; the two permanent magnet rotors 3 and the conductor rotor 4 are coaxially arranged, the conductor rotor 4 is positioned between the two permanent magnet rotors 3, and air gaps exist between the two permanent magnet rotors 3 and the conductor rotor 4;

the two permanent magnet rotors 3 and the conductor rotor 4 are both in circular structures; the outer side walls of the two permanent magnet rotors 3 are fixedly connected through a connecting piece 5;

a plurality of permanent magnets 3-1 are uniformly arranged on the air gap sides of the two permanent magnet rotors 3 along the circumferential direction, and the permanent magnets 3-1 on the two permanent magnet rotors 3 are axially magnetized;

the magnetizing directions of two adjacent permanent magnets 3-1 on the same permanent magnet rotor 3 are opposite, and the magnetic pole directions of the air gap sides of the permanent magnets 3-1 oppositely arranged on the two permanent magnet rotors 3 are opposite;

one end face of the driving end connecting flange 1 penetrates through a permanent magnet rotor 3 to be fixed on the conductor rotor 4, a gap exists between the permanent magnet rotor 3 and the driving end connecting flange 1, and the other end face of the driving end connecting flange 1 is used for being fixedly connected with external driving equipment;

one end face of the load end connecting flange 2 is fixed on the other permanent magnet rotor 3.

During specific application, the driving end connecting flange 1 is driven by external driving equipment (such as a motor) and is connected with the conductor rotor 4, synchronous rotation is realized, the conductor rotor 4 is a conductor, the conductor rotor 4 moves as magnetic lines of force of the two permanent magnet rotors 3 of the cutting part, induced current is generated inside the conductor rotor 4 and generates an induced magnetic field, the induced magnetic field and the permanent magnet magnetic field interact, the two permanent magnet rotors 3 are fixed together through the connecting part 5 and are subjected to tangential force action of the magnetic field, the tangential force generates a rotating force distance relative to the rotating circumferential direction, and the two permanent magnet rotors 3 rotate asynchronously relative to the conductor rotor 4 under the action of the rotating force distance. The N poles and S poles of the adjacent permanent magnets 3-1 on the same permanent magnet rotor 3 are alternately and uniformly arranged along the circumference, and the uniform distribution of the permanent magnets 3-1 is beneficial to the uniform stress of the permanent magnet rotor 3 in all directions and reduces the additional force during operation. The permanent magnets 3-1 are axial, and the axial polarities of the permanent magnets 3-1 correspondingly arranged on the two permanent magnet rotors 3 which are symmetrical left and right are the same, so that a magnetic field axially penetrates through the conductor disc, the magnetic flux density on the conductor disc is improved, the eddy current strength is higher, and the transmitted force and torque are further increased.

For particular applications, the permanent magnet rotor 3 is typically made of carbon steel or other ferromagnetic material.

The two permanent magnet rotors 3 are oppositely arranged, so that the viewing angle of the C1-C1 direction in fig. 2 is the same as the viewing angle of the C2-C2 direction in fig. 3, and the following description will be given by taking an example that two permanent magnets 3-1 in a rectangular frame in the C1-C1 direction in fig. 2 and two permanent magnets 3-1 in a rectangular frame in the C2-C2 direction in fig. 3, and 4 permanent magnets 3-1 in total form 1 magnetic circuit unit, and in fig. 4, two permanent magnets 3-1 on one permanent magnet rotor 3 and two permanent magnets 3-1 on the other permanent magnet rotor 3 are respectively oppositely arranged. The magnetic lines of force in the direction shown in fig. 4 facilitate the formation of induced eddy currents on the conductor rotor 4, and improve the torque transmission capability of the magnetic circuit.

Further, referring specifically to fig. 1 and 2, the eddy current coupling further includes two mounting discs 6, where the mounting discs 6 are in a circular structure and are arranged coaxially with the permanent magnet rotor 3;

the two mounting discs 6 are respectively fixed on the air gap sides of the two permanent magnet rotors 3, and one end face of each mounting disc 6 is provided with a mounting groove facing the permanent magnet rotor 3;

the permanent magnet 3-1 arranged on each permanent magnet rotor 3 is fixed in the mounting groove of the mounting disc 6 connected with the permanent magnet rotor 3, and the permanent magnet 3-1 is in contact with the corresponding permanent magnet rotor 3.

In the preferred embodiment, the mounting plate 6 may be made of paramagnetic or diamagnetic material having a relative permeability close to that of air, and the permanent magnet rotor 3 may be made of ferromagnetic material having a high magnetic permeability.

Further, referring specifically to fig. 1 and 2, the connecting member 5 is a connecting rod or cylindrical structure.

In the preferred embodiment, the two permanent magnet rotors 3 can be fixed together through the simple connecting piece 5, so that the synchronous rotation of the two permanent magnet rotors is realized, and the connecting piece 5 is simple in structure and convenient to realize.

Further, referring specifically to fig. 1 and 2, the permanent magnet 3-1 has a fan-shaped structure or a rectangular structure.

Further, with particular reference to fig. 1 and 2, the air gap spacing between the two permanent magnet rotors 3 and the conductor rotors 4 is the same.

In the preferred embodiment, the air gap distance between the two permanent magnet rotors 3 and the conductor rotor 4 is the same, so that the permanent magnets 3-1 on both sides of the conductor rotor 4 have the same axial component force on the conductor rotor 4 and can be mutually offset.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.