RU2292943C1 - Turbo-mixer with the electromechanical vibration exciter - Google Patents

Abstract

FIELD: construction materials industry; building industry; production of the batch mixers.

SUBSTANCE: the invention is pertaining to the batch mixers and may be used in the industry of construction materials, in building industry and other fields of the construction for production of the polydisperse construction materials. The technical problem solved by the invention is the increase of the productivity of the mixer, reduction of the mixing process power input, the reduced vibrations impact, as well as the other factors making effect on the wear of the bearings assemblies. The turbo-mixer with the electromechanical vibration exciter contains: the chamber of commixing, the rotor with the drive of rotation made with the blades, the vibrator made in the form of the sylphon bellows rigidly fixed in the middle of the chamber of commixing. The vibrator has the electromagnet, using which the sylphon bellows excites the oscillations of the particles in the horizontal direction. The mixer has the capability to regulate intensity of the vibration by changing the frequency of the alternating-current fed onto the electromagnet winding.

EFFECT: the invention ensures the increased productivity of the turbo-mixer, reduction of the mixing process power input, the reduced vibrations impact and other factors making effect on the wear of the bearings assemblies.

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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 is a batch rotary mixer, comprising 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 (Patent SU 1301476 A1, 04.17.1985, B 01 F 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 and the inability to control the intensity of the impact of the vibrator on the prepared mixture.

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 a rotary mixer with an electromechanical vibration exciter, comprising a mixing chamber, a rotor with a rotary drive, made with blades, a vibrator made in the form of a bellows with a disk, is rigidly fixed in the middle of the mixing chamber. The vibrator has an electromagnet, with the help of which the bellows excites particle vibrations 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 electromagnet.

Comparison with the prototype shows that in the vibrational mechanism of the proposed mixer there are no bearing assemblies and a 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 the drawing, which shows a diagram of a rotary mixer with an electromechanical vibration exciter.

The mixer comprises 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 6 is installed with electromechanical excitation of vibrations from the electromagnet 7. The vibrator 6 is made in the form of a disk 8, which serves as the anchor of the electromagnet 7, and a bellows 9. A rubber gasket 10 is designed to soften the collision of the disk 8 and the core 11 of the electromagnet 7, winding 12 which is connected to the network 13 with alternating current. The mixer also has windows 14 and 15 loading and unloading of materials, respectively.

A rotary mixer with an electromechanical vibration exciter works as follows: the drive 5 rotates the rotor 2 and the blades 3, 4, thereby mixing the prepared mixture. The winding 12 of the electromagnet 7 is connected to the network 9 with alternating current. The disk 8 of the vibrator 6 is attracted several times per second to the core 11 and comes back using the bellows 7, thereby making a reciprocating motion and exciting the particles of the mixture in the 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 chamber of the mixer 1.

The design of the mixer allows you to increase productivity and reduce energy costs for the mixing process, especially of hard concrete mixtures, due to the fact that when the vibrator vibrates with an amplitude value of vibration acceleration of 180 ... 250 m / s ² , a more uniform thixotropic destruction of the material structure occurs throughout the space mixing chamber, which is manifested in a decrease in viscosity of 50 ... 60 times or more compared with the viscosity of a known undamaged 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 (1)

A rotary mixer with an electromechanical vibration exciter, comprising a mixing chamber, a vibrator, a rotor with a rotary drive, made with blades, characterized in that the vibrator is made in the form of a bellows and is rigidly fixed in the middle of the mixing chamber.