RU2318586C2 - Rotor-vibration mixer with ring magnetostrictive converter - Google Patents

Abstract

FIELD: mixing.

SUBSTANCE: rotor-vibration mixer comprises mixing chamber, rotor provided with the rotation drive and provided with blades, and vibrator made of a pipe with disk and secured at the center of the mixing chamber. The vibrator has a ring magnetostrictive pack connected with the inner side of the pipe by means of shrink fitting. The ring core changes its periphery length and the diameter of the emitting pipe under the action of magnetic forces caused by the AC thus exciting the high-frequency vibration of the particle in the horizontal direction. The mixer is made for permitting control of the intensity of vibration by changing the frequency of the AC supplied to the winding of the ring magnetostrictive converter.

EFFECT: enhanced efficiency and reduced power consumption.

2 cl, 2 dwg

Description

The invention relates to batch mixers and can be used in the construction materials industry, in construction and other areas of the construction industry for the production of polydisperse materials.

A known forced-mixing mixer, comprising a rotor with blades mounted in a cylindrical bowl, connected to a rotational drive placed in the glass in the form of a gear transmission, the drive gear of which is mounted on the vertical shaft by bearings eccentrically, and the driven gear is made with internal gearing, the vertical shaft is equipped with an unbalance in in the form of a flywheel with an annular groove and balls placed in it (Korolev K.M. Production of concrete mix and mortar. M: Higher school, 1973, p. 156-161, Fig. 107.).

The SV-79 mortar mixer is also known, which contains a rotor with blades mounted in a cylindrical bowl and connected to its rotation drive (Korolev K.M. Production of concrete mix and mortar. M: Higher school, 1973, p. 156-161, fig. 107.).

The disadvantages of the known mixers include low productivity, high energy intensity of the process, low reliability of the load-bearing elements of the rotor drive parts, process instability.

Closest to the proposed one is a batch rotary mixer containing a mixing chamber, a rotor with a rotary drive, made with blades mounted at an angle of 45 ° to its radius, and a vibrator with kinematic excitation of vibrations, cantilever mounted along the axis of the mixing chamber, coaxial to the rotor blades, moreover, the vibrator is made in the form of a hollow cylinder with ribs on the outer surface and mounted on the crankshaft using spherical bearings (SU patent No. 1301476 A1, 04.17.1985, B01F 11/00).

The disadvantages of the known design include low productivity, significant energy consumption for the rotation of the rotor and additional energy consumption for the rotation of the vibrator, as well as a very high percentage of wear of the bearing assemblies.

The technical problem solved by the invention is to increase the performance of the mixer, reducing the energy intensity of the mixing process, reducing vibration effects, as well as other factors affecting the wear of bearing assemblies.

The technical result is achieved in that the rotary-vibration mixer with a ring magnetostrictive transducer comprises a mixing chamber, a rotor with a rotation drive made with blades, a vibrator made in the form of a radiating tube with a disk and rigidly fixed in the middle of the mixing chamber. The vibrator has an annular magnetostrictive package, connected to the inside of the pipe by a hot-seated method and consisting of a set of rings with holes, stamped from sheet material, forming the annular core of the magnetostrictive package. The annular core of the magnetostrictive package has holes located around the circumference of the rings into which the wires are passed, as a result of which a toroidal winding is formed. Under the influence of magnetic forces of the supplied alternating electric current, the annular core changes its circumference and the diameter of the radiating tube, which emits high-frequency oscillations, thereby exciting particles in the horizontal direction. The mixer has the ability to adjust the intensity of the vibration by changing the frequency of the alternating current supplied to the winding of the ring magnetostrictive converter.

Comparison with the prototype shows that in the vibration mechanism of the proposed mixer there is no vibration load on the bearing assemblies of the rotor rotation drive, particles of the prepared mixture are completely excluded from entering the vibrator. The inventive design of the mixer provides more uniform processing of the mixture by the vibrator in the entire space of the working chamber of the mixer, uniform destruction of the structure of the material, the creation of the effect of boiling, more intensive turbulence and circulation of the material in the body of the mixer and, in general, greater productivity and lower energy consumption for the mixing process.

The invention is illustrated by drawings: figure 1 presents a diagram of a rotary-vibration mixer with a ring magnetostrictive converter; figure 2 - ring magnetostrictive transducer in section.

The mixer contains a mixing chamber 1, a rotor 2, made with blades 3.4. The rotor 2 has a rotation drive 5. In the center of the mixing chamber 1, a vibrator is installed, made in the form of an emitting tube 6, which emits high-frequency vibrations, with a disk 7. The vibrator has an annular magnetostrictive package 8 connected to the inside of the pipe by a hot seat method and consisting of a set of rings with holes 9, stamped from sheet material, forming the annular core of the magnetostrictive package, into which the wires of the terminals 10 of an alternating electric current are formed, forming a toroidal winding. To prevent the radiation of the pipe 6 to the non-working surface of the package 8, as well as to prevent particles of the working mixture from getting inside the vibrator, a rubber reflector 11 is installed in the lower part of the vibrator, and a rubber gasket 12 in the upper part. The mixer also has loading windows 13 and 14 and unloading materials accordingly.

A rotary-vibration mixer with a ring magnetostrictive converter operates as follows: the drive 5 rotates the rotor 2 and the blades 3, 4, thereby mixing the prepared mixture. The emitting tube 6 using a magnetostrictive package 8, consisting of a set of rings with holes 9, which under the influence of magnetic forces supplied through the output of the wires 10 of an alternating electric current change their circumference and pipe diameter, emits high-frequency vibrations, thereby exciting vibration of the particles of the mixture in horizontal direction. In general, the design of the mixer allows you to intensify the mixing process while reducing energy losses due to the rotation of the rotor 2, due to a decrease in the resistance to movement of the blades 3 and 4, increased mobility and turbulization of the mixture in the entire volume of the mixer chamber 1.

The design of the mixer allows you to increase productivity and reduce energy costs for the mixing process of especially hard concrete mixtures, due to the fact that during vibrational movement of the vibrator with an amplitude value of vibration acceleration of 180 ... 250 m / s ² there is a more uniform thixotropic destruction of the material structure in the entire chamber space mixing, which manifests itself in a decrease in viscosity of 50 ... 60 times or more compared with the viscosity of known non-degraded material. In this regard, the resistance to movement of the blades and the power consumption of the rotor rotation drive are reduced. At the same time, the effect of boiling of the mixture under the influence of the oscillatory movement of the vibrator disk is achieved, greater turbulization and more intensive circulation of the mixture particles, as a result of which the mixing time is reduced, and the mixer productivity is increased.

Claims (3)

1. A rotary vibration mixer comprising a mixing chamber, a rotor with a rotary drive, made with blades, a vibrator, characterized in that the vibrator is made in the form of a tube with a disk emitting high-frequency vibrations and is rigidly fixed in the middle of the mixing chamber. 2. The mixer according to claim 1, characterized in that the vibrator has an annular magnetostrictive package, with which the emitting tube excites high-frequency oscillations of the particles in the horizontal direction. 3. The mixer according to claim 1, characterized in that it is possible to adjust the vibration intensity by changing the frequency of the alternating current supplied to the winding of the ring magnetostrictive converter.

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