SU1301476A1 - Rotary mixer - Google Patents

Abstract

The invention relates to batch mixers, can be used in various areas of the national economy for the preparation of polydisperse materials, and provides for the intensification and reduction of the energy intensity of the mixing process. The rotary mixer contains a mixing chamber, a blade rotor and a vibrator, made in the form of a hollow cylinder with ribs on the outer surface, fixed on the crankshaft using spherical bearings. The vibrator is mounted on the axis of the mixing chamber console and placed coaxially at the blade of the rotor. The ratio of eccentricities of the crankshaft's upper and lower crank journals is 0.15-0.48. The blades of the rotor, set at an angle of 45 to its radius, feed the material into the zone of action of the vibrator. The latter performs a complex oscillatory motion with a frequency and amplitude independent of the viscous resistance of the medium, and provides study (Vibration of the entire volume of the mixture. 2 Cp f-crystals, 2 ill. (L with 4; О5

Description

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The invention relates to batch mixers and can be used in the industrial construction materials, construction and other areas of the national economy for the preparation of polydisperse materials.

The purpose of the invention is to intensify and reduce the energy intensity of the mixing process,

1 shows a schematic of a mixer; Fig 2 is a diagram of the installation of the blades.

The mixer contains a mixing chamber 1, a rotor 2, filled with blades located at an angle of 45 ° to the rotor radius. The rotor has a drive 3 rotation. The axis of the mixing chamber, coaxially of the rotor blade of the rotor, installed vibrator 4 with kinematic excitation of oscillations from drive 5, the vibrator is made in the form of a hollow cylinder with ribs 6 on the outer surface and mounted on the crankshaft 7 , horn - is 0.15-0.48,

The rator is mounted on the shaft using spherical bearings 8. The design provides for dynamic balancing of the unbalanced part of the vibrator with the counterweight 9, which creates an equal and oppositely directed centrifugal force. In the mixer there are windows 10 for loading and unloading 11 materials,

The recommended ratio of the radius of the mixing chamber to the radius of the vibrator is R / r 8-10.

Cantilever installation of the vibrator allows the bearings to be protected from dust and mixture penetration, which would be impossible if one of the crankshaft bearings is located in the lower part of the mixing chamber. The presence of ribs on the hollow cylinder of the vibrator increases the area of vibration transmission and prevents it from spinning by force friction in bearings.

The mixer works as follows.

During the fast rotation of the crankshaft, the vibrator 4 performs a complex oscillatory motion with a given frequency and amplitude, independent of the viscous resistance of the medium, which

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ensures the constancy of the intensity of the vibration effect. The location of the vibrator along the geometric axis of the mixer allows to obtain a uniform destruction of the structure of the material in the entire volume of the mixing chamber. All this stabilizes the mixing process.

Installing the blades at an angle of 45 °

to the radius of the rotor provides the movement of the material to the vibrator and thereby the study of the vibration of the entire volume of the mixture. Under the action of vibration and rotating blades of the rotor, the structure of the mixture is destroyed, which causes the free movement of the particles of the components and, consequently, their mixing in the whole space of the mixing chamber with minimal energy expenditure on the forces of dry and viscous resistance to obtain a highly homogeneous mixture.

The reduction of energy consumption for rotor rotation occurs as a result of thixotropic destruction of the structure and decrease in the mixture viscosity at an amplitude value of the acceleration of oscillations 250 m / s up to 70 times compared with the viscosity of the undisturbed structure.

The productivity increases due to the shortening of the mixing time and the increase in the chamber volume by 7-10%. As a result of applying the vibration, the intensity of the process increases,

activation of cement clinker grains, which leads to an increase in the uniformity and quality of the mixture.

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Claims (3)

1. A rotor mixer comprising a mixing chamber and a rotor with a rotational drive impressed with blades, characterized in that, with In order to intensify and reduce the energy intensity of the mixing process, it is equipped with a vibrator with kinematic excitation of vibrations, which is cantilever mounted along the axis of the mixing chamber, coaxial blade rotor m. 2, Pop mixer, 1, characterized in that the rotor blades are set at an angle of 45 to its radius, 3. The mixer according to any one of the preceding paragraphs, 1, and 2 tons, is due to the fact that the vibrator is made in the form of a hollow cylinder with ribs on the outer surface and is mounted on the crankshaft using With spherical bearings, with an upper and lower crankpin, it is a knee of this ratio of the eccentricity of the roller shaft is 0.15-0.48. eleven 1 Editor M.Blanar Compiled by T.Kruglena Tehred L. Serdyukova: Corrector I. Erdeyi Order 1174 / 8Discount 566Subscription VNIIPI State1: About the USSR Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4