SU745548A1 - Electromagnetic vibration drive - Google Patents

Description

(54) ELECTROMAGNETIC VIBRATION DEVICE

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The invention relates to vibrating technology and can be used in geology, mining, construction materials and other areas of the national economy.

Vibration devices are known in which the drive communicates the yi-lovie oscillatory movements 1 to the working member. However, it does not allow obtaining horizontal vibrations.

The closest to the invention in its technical nature is an electromagnetic vibrating device containing a frame on which a spring-loaded vibrating plate and an electromagnetic actuator are mounted, the measles of which is fixed on the vibrating plate 2. However, it also does not allow simultaneous angular and horizontal oscillations.

The aim of the invention is to obtain angular oscillations with simultaneous oscillations in the horizontal plane.

This goal is achieved due to the fact that the vibrating plate is connected in the center with the frame by a cable with 1 U {6 support springs 1, and the electromagnetic actuator is made in the form of three electromagnets installed at equal angles of the equilateral triangle at the same time as the axis of the core and cores electromagnets are displaced in a horizontal plane relative to each other.

FIG. 1 shows the proposed vibration device with a partial cut; in fig. 2 - the same, with conventionally removed vibrating plate for a better display of the structure, top view; in fig. 3 is the simplest variant of the electric circuit of power supply and control of the vibrating device.

On shock absorbers 1, a bed 2 is installed, on which three electromagnets 3 are fixed at equal distances around the circumference and mounted on the heads of bolts 4 screwed on bed 2, three spiral springs 5. At the upper ends of the springs 5 a vibrating plate 6 of rigid construction is installed, fitting chickpea in the center of the frame by cable 7 by means of the support spring 8. To the bottom plane of the vibrating plate 6 three cores 9 electromagnets are attached 3. Center lines

20, the core 9 and the core of the electromagnet 3 are offset as shown in FIG. 1. With this mutual arrangement, measles 9 is achieved, and with the institute, the ibroplate 6 move in a vertical-horizontal direction. The working gap of the magnetic system is established by bolts 4, corresponding to the tension of the cable 7 with the help of a nut 10 and gaskets 11 under the cores of electromagnets 3. The elasticity of the springs is chosen so that the frequency of free vibrations of the vibrating plate with the object fixed on it for vibration is slightly higher than the pulse frequency of supply coils of electromagnets. The power supply to the coils of electromagnets (see Fig. 3) is made from a three-phase alternating current network, with or without half-wave rectifier. The amplitude of oscillations is set by the switch 1П ..,, ЗП by changing the value of the resistance of the resistors 1Р1 ... 3РЗ, connected in series with the coils of the electromagnets 1Em ... ЗЭм. 1D ... ZD rectifier elements are included according to the single-ended rectifier scheme. . When the mains voltage is switched on with the switch 1Вк ... ЗВк, current impulses are alternately applied to the coils of electromagnets 1Em ... 3PM, exciting the magnetic fields of the corresponding electromagnets. The alternating attraction of the cores of electromagnets, which, being connected to the vibrating plate and attached to it with an object for vibration, occurs, passes the complex oscillatory movements to the latter. Regulation of the magnitude and frequency of the current pulses allows setting the mode of the highest plant capacity. Complicated oscillatory movements consisting of circular rocking, vertical and horizontal movements in comparison with vertical unidirectional forces create additional forces, under the effect of which, in the case of sifting, the material being sifted continuously moves (transported) along the grid plane with vigorous mixing, as a result of which the sifting process is faster and better quality.

Claims (2)

745548 A vibration device can be used to grind and abrade rocks or other materials. For this, instead of a set of sieves, a mortar with a spherical working surface and a grinding bowl in the form of a single ball is fixed on the upper plane of the vibrating plate. In this case, the advantages of complex oscillatory movements are also retained. In addition to vertical movements, the ball acquires circular oscillating movements, which contributes to the acceleration of the process of grinding and abrasion of the material. The vibration device can be used in various industries, mainly in laboratory conditions, as an analyzer or classifier for separating crushed rocks, grains, seeds and other bulk materials by size, as well as for their grinding and abrasion when using a vibration device. as a micromill. An electromagnetic vibration device comprising a frame on which a spring-loaded vibrating plate is installed and an electromagnetic actuator, the measles of which is fixed on a vibrating plate, characterized in that, in order to obtain angular oscillations with simultaneous oscillations in the horizontal plane, the vibrating plate is centrally connected to the frame by means of the support spring, and the electromagnetic actuator is made in the form of three electromagnets installed at the corners of an equilateral triangle at equal distances x from the center vibrating plates, while the axes of the cores and the cores of the electromagnets are displaced in a horizontal plane relative to each other. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2507820/10, cl. B 06 B 1/04, 1977. 2. USSR author's certificate number 123795, cl. B 06 B 1/04, 1959 (prototype). r 745548 (Riga.Z