RU2398625C1 - Rotary mixer with mechanical vibration exciter - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to cyclic-operation mixers and can be used in agriculture, production of construction materials etc., for fabrication of multicomponent mixes. Proposed mixer comprises mixing chamber, electrically driven rotor with vanes and vibrator representing a welded bellows with folding flutes. Vibrator is rigidly secured at the mixing chamber center and coupled with drive motor via crank gear.

EFFECT: reduced materials-output ratio, ease of servicing, lower electric power consumption and higher efficiency.

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Description

The invention relates to batch mixers and can be used in agriculture, the industry of building materials, in construction and other areas of the production of multicomponent mixtures.

Known forced-mixing mixers containing a rotor with blades mounted in a cylindrical bowl connected to a drive for its rotation (Korolev K.M. Production of concrete mix and mortar. M: Higher school, 1973, p.156-161, Fig. 107).

There is a rotary batch 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 oscillators cantileverly mounted along the axis of the mixing chamber coaxially with the rotor blades. 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 301476 A1, B01F 11/00, 04/17/1985).

Known rotary mixer with a mechanical vibration exciter containing a mixing chamber, a rotor and a vibrator made in the form of disk springs with rubber shock absorbers. The vibrator is rigidly fixed in the center of the mixing chamber and its vibrations are excited by a crank mechanism (Patent RU 2297274 C1, B01F 11/00, 04/20/2007, bull. No. 11).

The disadvantages of the known mixers include low productivity, high energy consumption of the process, low reliability of the bearing elements of the rotor drive parts, the presence of material-intensive and energy-intensive crank drive of the vibrator, the invariance of the amplitude of the vibrator.

Closest to the proposed is a rotary mixer with a mechanical vibration exciter (Patent RU 2297274 C1, B01F 11/00, 04/20/2007, bull. No. 11).

The disadvantages of this design include: low durability (cyclic strength) of the structure, especially at the joints of plates and rubber shock absorbers, low amplitude of particle oscillations in horizontal and vertical directions, associated with high stiffness of disk springs, low study of the mixture in the entire space of the working chamber of the mixer, the absence of a guarantee of the tightness of the structure due to the unreliable connection of the spring-shock absorber assembly.

The essence of the invention lies in the fact that the vibrator is made in the form of a welded bellows with folding corrugations of a periodic profile. In this case, when folding the corrugations, the mixture is completely squeezed into the working chamber of the mixer, which ensures the maximum amplitude of particle vibrations in the horizontal and vertical directions. In this case, the effect of complete mixing is achieved faster, which leads to greater productivity and less energy consumption for mixing. The lower stiffness of the welded bellows compared to the Belleville springs leads to greater cyclopresistance of the vibrator.

The technical problems solved by the invention are: reducing the material consumption of the structure, simplifying the maintenance of the vibrator, reducing the overall energy consumption, improving the intensification and increasing the productivity of the mixing process, achieving greater cyclopresistance of the vibrator.

The technical result is achieved in that in a rotary mixer containing a mixing chamber, a rotor made with blades and combined with a rotation drive, the vibrator is made in the form of a welded bellows with folding corrugations.

A rotary mixer with an electromechanical vibration exciter is shown in the drawing. The mixer has a mixing chamber 1, windows 2 and 3 for loading and unloading materials, respectively, a rotor 4 made with blades 5, 6, connected to a rotation drive 7. A vibrator 8 is installed in the center of the mixing chamber 1. The vibrator 8 is made in the form of a welded bellows with folding corrugations 9.

A rotary mixer with a mechanical vibration exciter works as follows: the drive 7 rotates the rotor 4 and the blades 5, 6, which mix the multicomponent mixture. When the engine 10 is connected to the electric network, by means of an eccentric mechanism 11, the oscillatory motion is transmitted through the rod 12 to the bellows shell 9. Under the action of the bellows shell, the particles of the mixture are excited in horizontal and vertical directions. The design of the mixer, in general, allows to reduce the material consumption of the structure, simplify the maintenance of the vibrator, reduce the overall energy costs, increase the productivity of the mixing process, and achieve greater cyclopresistance of the vibrator.

Claims (1)

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

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