CN201374639Y - Non-contact axial magnetization multi-ring magnetic coupling - Google Patents

Abstract

A non-contact axially magnetized multi-ring magnetic coupling relates to the technical field of transmission in mechanical engineering, including a drive disc assembly and a driven disc assembly, the drive disc assembly is connected to the drive shaft through a flat key; the driven disc The assembly is installed at one end of the driven shaft, and it is characterized in that: the drive disc assembly is composed of a drive disc base body and a drive disc permanent magnet; On the first end surface; the driven turntable assembly is composed of the first driven disk base body, the second driven disk base body, the driven disk permanent magnet and the sleeve; the driven disk permanent magnets are closely arranged according to the even-numbered N pole and S pole It is glued on the two inner end surfaces of the first driven disk base body and the second driven disk base body, and its magnetism is opposite to the driving disk permanent magnet on the end surface of the driving disk base body. Its advantages are: stable transmission, no noise, large transmission torque and high efficiency.

Description

Non-contact axial magnetization multi-ring magnetic coupling

technical field

The utility model relates to the technical field of transmission in mechanical engineering, in particular to a non-contact axially magnetized multi-ring magnetic coupling, which can be applied to a non-contact mechanical transmission system with large vibration, large torque and low speed.

Background technique

In the field of mechanical engineering, couplings are widely used in mechanical transmission connections. Couplings are mainly divided into two categories: rigid and elastic, both of which can achieve the function of transmitting power. However, it has the disadvantages of low transmission efficiency, large energy loss, easy hard impact, short service life of parts, and consumes a large amount of lubricating oil in some high-speed, large-vibration mechanism transmissions. In view of the above-mentioned shortcomings of the coupling, the predecessors proposed the magnetic coupling, which is different from any other coupling in that there is no mechanical contact between the two half couplings, and the non-contact transmission is realized through magnetic force, and the dynamic The seal is transformed into a static seal with advantages such as vibration isolation and overload protection.

Magnetic couplings can be divided into cylindrical magnetic couplings and disc magnetic couplings. Compared with cylindrical magnetic couplings, disc magnetic couplings have simple structure, compactness, short axial dimension, saving raw materials, The magnetic ring is easy to manufacture and install, and can adjust the transmitted torque by changing the size of the air gap. However, because the magnetic poles on its two discs are all axially magnetized, according to the principle of magnetic poles repelling each other (opposites attract each other), it has a large axial force on the two axes. In order to ensure the stability of the two axes, it must be in the two axes High rigidity bearings or other balancing devices are used at the shaft ends, so during the power transmission process, the supporting bearings or balancing devices bear a large axial force, which will easily lead to increased wear and loss of the supporting bearings, shortened service life, and balance The device is damaged; and it transmits little torque and low efficiency. This is the limitation of the current traditional disc magnetic coupling.

Contents of the invention

The purpose of this utility model is to provide a new disc-shaped magnetic coupling—a non-contact axially magnetized multi-ring magnetic coupling. It not only retains the characteristics of the traditional disc magnetic coupling, but also solves the defects of large axial force and small transmission torque of the traditional disc magnetic coupling. Especially suitable for high torque, low speed transmission.

A non-contact axially magnetized multi-ring magnetic coupling, including a drive disc assembly and a driven disc assembly, the drive disc assembly is connected to the drive shaft through a flat key; the driven disc assembly is mounted on one end of the driven shaft, It is characterized in that: the driving disk assembly is composed of a driving disk base body and a driving disk permanent magnet; the driving disk permanent magnets are closely arranged and glued on the two end surfaces of the driving disk base body according to the even number of N poles and S poles; the driven turntable assembly It is composed of the first driven disk base, the second driven disk base, the driven disk permanent magnet and the sleeve; the driven disk permanent magnets are closely arranged in N poles and S poles, and are respectively glued to the first driven disk base And on the two inner end surfaces of the second driven disk base body, its magnetism is opposite to the driving disk permanent magnet on the end surface of the driving disk base body.

In the above-mentioned shaft coupling, the N pole and S pole of the permanent magnet of the driving disk and the permanent magnet of the driven disk can be a single pole, or multiple ring magnets of the same polarity and size can be one pole. In the above coupling, the base body of the first driven disc and the base body of the second driven disc are connected by screws.

In this device, permanent magnets with N poles and S poles arranged closely alternately are installed on the two end surfaces of the driving turntable; The permanent magnets of the turntable are magnetically opposed to form a high-energy magnetic field. In the static state, the N poles and S poles of the permanent magnets of the two disks attract each other in a straight line, and the torque is zero at this time. When the driving turntable rotates under the drive of the motor, the driving turntable is offset by an angle relative to the driven turntable. Due to the existence of this angle, the N pole (S pole) of the permanent magnet on the drive disk is opposite to the S pole of the permanent magnet on the driven disk. (N pole) has a pulling effect, and at the same time, the N pole (S pole) on the driving disk has a pushing effect on the previous N pole (S pole) on the driven disk, and its tangential force is superimposed to drive the driven disk For the same direction of motion, so as to achieve the transmission of torque.

The utility model has the advantages that although the non-contact axially magnetized multi-ring magnetic coupling still has a large axial force between two relative permanent magnets, the permanent magnet of the coupling is axially symmetrical with respect to the base of the driven turntable. Two groups of relative permanent magnets generate magnetic force of equal magnitude and opposite direction, and a pair of balance forces on the shaft cancel each other out, thus reducing the force on the two shafts and making the transmission more stable; at the same time, the torque of the magnetic coupling The transmission is realized through the air gap magnetic field. Compared with the traditional disc magnetic coupling, the utility model has one more working air gap magnetic field. For example, at the same main speed, the torque it transmits is higher than that of the traditional disc magnetic coupling. The transmitted torque is large and the efficiency is higher, which solves the defect of small transmission torque of the traditional disc magnetic coupling.

Description of drawings

Fig. 1 is the overall structure diagram of the utility model

Figure 2 is a sectional view of the drive assembly

Figure 3 is the left view of the drive assembly

The labels in the figure respectively represent: 1. Drive shaft; 2. First driven disc base; 3. Driven disc permanent magnet; 4. Drive disc permanent magnet; 5. Drive disc base; 6. Second driven disc base ; 7. Sleeve; 8. Driven shaft

I. Drive disc assembly II. Driven disc assembly

Detailed ways

The general structure of the present utility model is shown in Figure 1, and the device includes: a driving disk assembly I and a driven disk assembly II. The driving disc assembly I is connected with the driving shaft through a flat key; the driven disc assembly II is installed at one end of the driven shaft.

Concrete structure of the present utility model: drive disc assembly 1 as shown in Figure 1, comprises drive disc substrate 5 and drive disc permanent magnet 4; On the two end faces of the disk base 5, the N pole and the S pole can be a single pole, or multiple ring magnets with the same polarity and the same size; the driven turntable assembly II includes the first slave Driven disc matrix driven disc base body 2 and second driven disc base body 6, driven disc permanent magnet 3, sleeve 7); the first driven disc base body 2 and the second driven disc base body 6 are connected by screws, driven The disk permanent magnets 3) are closely arranged on the two inner end surfaces of the first driven disk base body 2 and the second driven disk base body 6 according to the even-numbered N pole and S pole, respectively, and their magnetism is connected to the end surface of the drive disk base body 5. The driving disk permanent magnets 4 are opposite; the N pole and the S pole can be a single pole, or multiple ring magnets with the same polarity and the same size can be a pole.

Claims (2)

1. A non-contact axially magnetized multi-ring magnetic coupling, including a driving turntable assembly (I), a driven turntable assembly (II), and the driving turntable assembly (I) is connected to the drive shaft (1) through a flat key Connect; the driven disc assembly (II) is contained in one end of the driven shaft (8), and is characterized in that: The drive disc assembly (I) is composed of a drive disc base body (5) and a drive disc permanent magnet (4); the drive disc permanent magnets (4) are closely arranged and bonded to the drive disc base body (5) according to the even number of N poles and S poles. The two end surfaces of the driven disc assembly (II) is composed of the first driven disc base (2), the second driven disc base (6), the driven disc permanent magnet (3) and the sleeve (7) The permanent magnets of the driven disk (3) are closely arranged on the two inner end surfaces of the first driven disk base body (2) and the second driven disk base body (6) according to the N pole and S pole even-numbered phases. The magnetism is opposite to the drive disc permanent magnet (4) on the end face of the drive disc substrate (5). 2. The shaft coupling according to claim 1, characterized in that: the N pole and S pole of the driving disc permanent magnet (4) and the driven disc permanent magnet (3) are single magnets with one or more same poles Sexual, ring magnets of the same size as one pole.

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