JPS61200863A - Electromagnetic type crushing and stirring apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to an electromagnetic grinding and stirring device that is capable of efficiently cooling a processing container whose temperature has increased due to grinding, etc.

[Prior art and its problems]

I will explain. In this figure, a pair of magnetic field generators l that generate moving magnetic fields φ11φt in opposite directions are shown by arrows.
A processing container 8 made of non-magnetic metal is disposed between 1 and 2, and a large number of working pieces 4, for example spindle-shaped, made of ferromagnetic or non-magnetic conductive material are placed in the container 8, as well as particles to be processed. An object 5 or a liquid is contained. The magnetic field generator! Reference numeral 11.2 is a so-called linear motor, in which multi-phase AC excitation coils 7, such as 8-phase, are arranged in grooves 6a provided on opposing surfaces of a pair of iron cores 6, with an equal polar pitch P as shown in FIG.
For example, the wires are wound in a wave-wound manner so as to form multiple poles. When the working pieces 4 are placed within a moving magnetic field φ1, φ, they move due to the action of electromagnetic force accompanying the generation of magnetization or eddy current, and the working pieces 4 and the container 8 immediately move.
In addition to the collision with the inner surface, violent random movements occur within the container a.

The object to be processed 5 is crushed, stirred and mixed by collision with the working piece 4 which moves randomly.

The processing container 8 reaches a high temperature due to energy, heat generated due to collisions, etc., and heat generated due to crushing, stirring, and mixing of the processing object 6, which not only makes it difficult to handle the container 8, but also causes the processing object 5 to become hot. It has the disadvantage that it may deteriorate or discolor.

[Purpose of the invention]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide an electromagnetic grinding and stirring device that can efficiently cool a processing container.

[Key points of the invention]

In order to achieve the above-mentioned object, the present invention provides a container cooling water passage at a weak magnetic field position in a direction orthogonal to the moving magnetic field of the processing container.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the present invention, and parts indicated by the same reference numerals as in FIGS. 4 and 5 are the same parts. In this figure, a plurality of second cooling water passages 14 are provided at weak magnetic field positions in a direction orthogonal to the moving magnetic fields φ1 and φt of the processing container 18.
It is provided as shown in the figure, and a working piece 4 and a material to be processed 5 such as crushed material are housed in a processing section 15 located in a strong magnetic field.

The weak magnetic field and the strong magnetic field will be explained based on FIG. 8, which conceptually shows the magnetic field distribution in the working space of the magnetic field generators 1 and 2.

In this figure, the phase order of the coil 7 is U-V'- to the right in the magnetic field generating bag w11 and to the left in the magnetic field generating device 2.
W-U'-V -W'-U (U and U/, V and v/, W
and W' are arranged in the order of O indicating coil conductors of the same phase and opposite directions. The vertical arrows indicate the magnetic field vector at each point when the current in the U-phase coil 7 reaches its maximum, and the ellipse A indicates the trajectory of the magnetic field vector when the current in the coil 7 changes by one cycle. This shows that the magnetic field at most points can be seen as an oval rotating magnetic field that changes direction counterclockwise. In Fig. 8, magnetic field generator ll and 2 U
The magnetic field on the line connecting the phase coils 7 acts so that the magnetic fields due to the currents of the same phase cancel each other out, so the strength of the magnetic field is small overall throughout one cycle, and especially at the center point, it completely cancels out and is always zero. . This situation is the same on the line connecting the U' coils 7 separated by a pole pitch P. On the other hand, in the center of the pole pitch P of the U-phase coil 7, the magnetic fields act so as to add to each other, so the strength of the magnetic field is large. A weak magnetic field and a strong magnetic field are generated alternately on the line connecting the opposing in-phase coils 7 and at the center of the pole pitch P thereof.

The working piece 4 rotates around its center of gravity due to the rotating magnetic field in the working space, and moves randomly along the path shown by the arrow B along the moving direction of the moving magnetic field φ11φ within the range of the pole pitch P as a whole. go around. The processing section 15 of the processing container 18 is provided in a strong magnetic field position with a pole pitch P, and the container 18 whose temperature has increased is placed in the cooling water passage 14.
Since it is arranged in a weak magnetic field position, the object to be processed 5 can be cooled without substantially impairing the crushing performance, etc.

〔Effect of the invention〕

According to the present invention, in an electromagnetic crushing and stirring device, a container cooling passage is provided in a weak magnetic field position of a processing container disposed between a pair of magnetic field generators, thereby cooling the processing container almost without interference. This has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the container shown in FIG. 1, FIG. 3 is a magnetic field distribution diagram of FIG. 1, and FIG.
The figure is a longitudinal sectional view of a conventional example, and FIG. 5 is a winding diagram of FIG. 4. 1.2...Magnetic field generation bag-14...Working piece, 5...Working piece, 7...Coil, 18...Container, 14...Flow channel, φ1, φ2... moving magnetic field.

Claims (1)

[Claims] 1) A processing container is arranged between a pair of magnetic field generators that generate moving magnetic fields in opposite directions using multiphase AC excitation coils, and a large number of working pieces made of ferromagnetic or non-magnetic conductive materials are placed inside this container. In an electromagnetic crushing and stirring device that houses a material to be processed such as crushed material, and crushes, stirs, and mixes the material to be processed by the random movement of a working piece caused by the action of the moving magnetic field, the moving magnetic field of the container and An electromagnetic pulverizing and stirring device characterized by having a container cooling passage provided in a weak magnetic field position in orthogonal directions.