RU2545298C1 - Centrifugal mixer with guide diffuser - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: centrifugal mixer contains tapered downward vertical cone casing, cover, on which the loading branch is installed, shaft, on which the rotor is secured in form of a disk, on which the hollow thin wall truncated cone with wavelike top edge is installed concentrically by smaller base. On cover the guide diffuser is installed.

EFFECT: increased intensity of loose materials mixing.

1 dwg

Description

The invention relates to continuous devices for the preparation of various combined mixtures, can be used in food, chemical, construction and other industries.

Known centrifugal mixer of powdered materials [1], comprising a housing, a device for loading and unloading materials, a rotor mounted on a shaft. The rotor has the shape of a truncated hollow body of rotation of a paraboloid formed by rotation of the curve, with the equation y = ax ² , where a = 0.05-0.20. A flat rotor base corresponding to the plane of truncation of the paraboloid is fixed on the shaft. The elliptical paraboloid can be mounted coaxially inside the rotor on a flat base. The height of the parabaloid is 0.4-0.6 of the height of the rotor.

The technical drawback of this centrifugal mixer is its low smoothing ability, insufficient intensity and efficiency of the mixing process, since the duration of movement of material particles inside the apparatus is very short, even when they are mixed in a thin layer of material. In addition, the configuration of the surface profile of the rotor significantly complicates the manufacturing technology of the rotor compared to the simple form of a hollow truncated cone.

The indicated drawbacks are deprived of a centrifugal mixer of powdered materials [2], containing a vertical (tapering downward) conical body; a cover on which there is a loading nozzle and a bearing assembly; in which the shaft is fixed. The rotor is mounted on the shaft in the form of a plate made of a hollow truncated cone (with a wavy top edge) connected from below by a smaller base with a disk. A common drawback of the considered mixers is that under the action of centrifugal force the finely dispersed components in the mixture rise up, as a result of which its partial separation (segregation) occurs.

The technical result, which consists in increasing the intensity of the process of mixing finely divided bulk materials while reducing the degree of segregation, is achieved due to the fact that the centrifugal mixer contains a tapering vertical conical body, a cover on which there is a loading nozzle, a shaft on which a rotor is mounted, made in in the form of a disk on which a hollow thin-walled truncated cone with a wave-like upper edge is concentrically mounted with a smaller base, while the lid is fixed to directs diffuser. This technical solution allows to eliminate stagnant zones in the center of the rotor, increase the duration of movement of material particles inside the apparatus and significantly reduce the degree of segregation

In FIG. 1 is a perspective view of a continuous centrifugal mixer.

The mixer consists of the following elements: a vertical conical body 1, an elliptical cover 2, on which a loading pipe 3 and a guide diffuser 4 are installed, bottoms 5 with a discharge pipe 6, a shaft 7 on which the discharge blades 8 and a rotor are installed, in the form of a disk 9, on which it is concentrically mounted, with a smaller base to the bottom, a hollow thin-walled truncated cone 10.

The mixer is as follows. Bulk materials are fed through the loading pipe 3 to the base of the disk 9 of the rotating rotor and evenly spread along it under the action of centrifugal force. Then the particles move from bottom to top on the surface of the hollow thin-walled truncated cone 10. From the moment the components move along the cone 10, finely dispersed particles begin to rise into the dusty air space, and the main material flow continues to move along its surface. Highly dispersed particles, rising upward, envelope the surface of the guide diffuser 4 and tend to the center of the rotor, mixing with a new material flow moving along the rotating surface of the cone 10. Having reached its upper edge, under the action of centrifugal force, the resulting mixture is discharged into the space between the rotor and the housing 1, getting on the bottom of the mixer 5. The finished mixture is discharged from the apparatus through the discharge pipe 6 using the discharge blades 8.

The intensification of the mixing process is achieved due to the fact that a guiding diffuser is installed on the lid, which provides internal recirculation of finely dispersed components that are mixed in the main material flow in the future, and this also eliminates stagnant zones inside the apparatus, thereby improving the quality of the resulting mixture.

Literature

1. A.S. RU 2121870, IPC B01F 7/28, 1998

2. Patent RU 2361653, IPC B01F 7/26, 2009

Claims (1)

A centrifugal mixer containing a tapered vertical conical body tapering downward, a cover on which there is a loading nozzle, a shaft on which a rotor is mounted, made in the form of a disk, on which a hollow thin-walled truncated truncated cone with a wavy upper edge is concentrically mounted with a smaller base, characterized in that the cover is fixed guide diffuser.

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