CS195416B1 - Magnetic coupling - Google Patents

Description

and

BACKGROUND OF THE INVENTION 1. Field of the Invention

Magnetic couplings are designed for various applications and are equipped with electromagnets or permanent magnets. A special advantage is provided by the magnetic clutch wherever transmission through the vessel wall needs to be resolved, replacing the sealing of the rotating de le.

In the known permanent magnet power transmission devices, the coupling force is mostly dependent on its diameter, and its power transfer possibilities, for example, by which the movement of the motor to the stirrer in the vessel are limited by the diameter of the vessel. If a small diameter coupling is used in such a case, it usually transmits small forces and is considerably unreliable in operation.

These disadvantages are overcome by the magnetic coupling according to the invention, which is based on the fact that the drive element consists of a hollow cylinder of ferromagnetic material, the inner surface of which has at least two permanent magnets in the shape of longitudinal segments oriented perpendicularly to the axis of the hollow cylinder. which is formed by one or more permanent magnets oriented perpendicularly to the axis of the cylinder, the longitudinal segments of the drive member having the opposite orientation to the corresponding permanent magnets of the driven member. Another alternative is that the cylindrical drive element does not have to consist of permanent magnets, but only of erromagnetic material such as soft iron.

However, the driven organ may also be a combination of the two previous cases, and thus may consist of one or more permanent magnets with pole pieces of ferromagnetic material.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic coupling of permanent oriented magnets of small diameter and large transmission force, which can be increased and can also be advantageously used to transmit movement across the vessel wall.

An example of a magnetic coupling according to the invention is shown schematically in the accompanying drawing, in which Fig. 1 shows a magnetic coupling of a fermenter in a front view and in FIG.

in section AA.

The magnetic clutch consists of a drive member 6 forming the outer part of the coupling and a driven member 6 forming the inner part of the coupling. The drive member 6 is connected by a shaft 6 to an electric motor 7, whose stator is connected to a fixed clutch housing 6. The drive member 1 consists of a hollow cylinder 6 of ferromagnetic material, on the inner surface of which two permanent magnets are diametrically mounted in the form of longitudinal segments 6 oriented perpendicularly to the axis of the hollow cylinder 6. The drive member 6 is rotatably mounted in the housing 9 by means of bearings 10 ♦

Inside the hollow cylinder 4 of the drive member 4 there is a coaxially driven member 4 such that a hollow cylinder 11 of a non-magnetic material, e.g. not cut, is mounted in the gap between the drive member 4 and the driven member 4. The hollow cylinder 60 is closed at the top and sealed tightly at the bottom of the fermenter lid. The driven element 6 is rotatably supported in the hollow cylinder 11 by bearings 13.

The driven element 4 is formed of permanent magnets 5 * with pole extensions 6 of ferromagnetic material.

The power of the electric motor 7, which is located outside the fermenter, is transmitted by means of the magnetic coupling drive 1 through the walls of the hollow cylinder 11 to the driven member 2, which is connected, for example, to the agitator or defoamer axis.

Alternatively, the magnetic coupling can be used wherever forces corresponding to the magnitude of the magnetic power of existing permanent magnets are to be transmitted.

OF THE INVENTION

A magnetic clutch comprising a drive member and a drive member coaxial, comprising permanent magnets, and an outer part consisting of a hollow cylinder, characterized in that the outer part constituting the drive member (1) is of ferromagnetic material on which at least two permanent magnets in the form of longitudinal segments (3) oriented perpendicular to the axis of the hollow cylinder (2) are diametrically mounted and the driven member (4) has a cylindrical shape consisting of one or more permanent magnets (5) oriented perpendicular to the axis The longitudinal segments (3) of the drive member have the opposite orientation to the corresponding permanent magnets (5) of the driven member.

Device according to Claim 1, characterized in that the permanent magnets of the driven organ (4) have pole extensions (6) of ferromagnetic material.

Claims (2)

195416 magnets 5 with pole pieces 6 of ferromagnesium material. The force of the electric motor 7, which is located in the fermentor, is transmitted via the magnetic clutch driving member via the walls of the hollow cylinder 11 to the driven member 4, which is connected, for example, to the agitator axis or the fermenter defoamer, etc. Otherwise, the magnetic coupling can be used, where the forces corresponding to the magnitude of the magnetic power of the existing permanent magnets are to be transmitted. THE INVENTION 1. A magnetic clutch comprising a driving and driven member disposed coaxially, comprising a permanent magnet and an outer portion consisting of a hollow cylinder, characterized in that the outer portion forming the driving organ (1) is of ferromagnetic material on the inner surface of which is at least two permanent branch magnets of the longitudinal segments (3) oriented perpendicular to the axis of the hollow cylinder (2) and the driven body (4) is cylindrical, which is formed by one or more permanent magnets (5) perpendicular to the cylinder axis; wherein the longitudinal segments (3) of the organ drive oppositely to the corresponding permanent magnets (5) of the driven body. 2. Apparatus according to claim 1, characterized in that the permanent magnets of the driven body (4) have pole pieces (6) made of ferromagnetic material. 1 sheet drawings Srvrrografia. n. p., tivod 7. Most