RU1777812C - Working tool for mill - Google Patents

Abstract

The invention relates to structures for crushing solids. The invention improves the quality of grinding. The working body of the mill contains a shaft 1 and a blade 2 mounted on it. The shape of the blade is shown in the drawing. 10 ill.

Description

Fie 10

The invention relates to the construction of devices for grinding solids by crushing.

It can be used, in particular, to grind coffee and grain.

Known working body of the mill, made in the form of a three-blade knife. To increase the grinding surface, each lobe has a different level in height, i.e. along the axis of rotation of the knife. For this, two of the three petals are bent at their hub.

A food mill is known which comprises a working chamber located in the housing with an electric motor, on the shaft of which a horizontal knife is mounted using a nut. The nut is made in the form of a cone with four ribs along its generatrix located in mutually perpendicular planes. A vertical partition is fixed to the lid, dividing the upper part of the working chamber into two symmetrical parts. The height of the vertical partition is 1/3 of the height of the working chamber.

A disadvantage of the known mill is the increased energy expenditures for the auxiliary operation — stirring of the substance to be processed as compared to the fraction of the energy expended in actually grinding the substance.

An object of the invention is to improve grinding quality.

This is achieved due to the fact that the working body of the mill contains a shaft and a blade mounted on it. The shape of the blade is shown in the drawing.

In FIG. 1 shows a structural diagram of the working body to the mill; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a section BB in FIG. 1; in FIG. 4 is a section BB in FIG. 1; in FIG. 5 is a section GG in FIG. 1; in FIG. 6 is a section DD in FIG. 1; Fig.7 is a scan of the working body of the mill on a plane; in FIG. 8 is a cross-section EE in FIG. 7; in FIG. 9 is a section FJ in FIG. 7. FIG. 10 - shows the blade.

The working body of the mill (Fig. 1) consists of a shaft 1, vertically located, and fixed on it a blade 2, made in the form of articulated, i.e. closed one-sided surface as Mobius strip.

In the upper place (Fig. 2) of the fastening of the blade 2 to the shaft 1, the plane of the blade 3 is perpendicular to the axis of the shaft 1.

In the lower place (Fig. 3) of the fastening of the blade 2 to the shaft 1, the plane of the blade is parallel to the axis of the shaft 1.

In the meridional section (Fig. 4), profiles 5 and 6 with vectors of peripheral velocity V comprise angles a of approximately 45 °.

The shaft 1 has a direction of rotation while N.V. The leading edges of the blade 7, 8 are flat, i.e. faces are located orthogonally to the axis of the sections. 1 The trailing edges 9, 10 are rounded.

In the intermediate section (Fig. 5, 6)

profiles 11 and 12 with velocity vectors Vi

angles a. 1, significantly

smaller angles in the meridional section.

Sweep the blades on a plane (Fig. 7)

is an S-shaped figure 13,

external points of which 14 and 15 are connected

. in one place on the shaft 1. In this case, figure 13

dressed on a shaft with its middle 16. Vane.

mainly can be performed

out of the plate.

The working faces 7, 8 (Fig. 8, 9) of the blades

formed by the convex ribs of figure 13.

The operation of the mill is as follows.

As the shaft 1 of the blade rotates, linear velocity is reported. The blade moves forward by the working faces 7 and 8. When particles of a substance that are filled into the mill get on these faces, these particles collide with faces 7 and 8 on

smaller parts. Particularly intensive destruction of particles occurs when they hit the edges of faces 7 and 8. Then there is spalling, a cut of particles smaller from larger ones. A mixture of shattered and intact

Claims (1)

the particle moves from the top of the shaft downward, and below - to the sides and again enters the walls of the housing up to the entrance of the blade. Those. there is effective mixing of particles throughout the blade. Work ends when the required particle size reduction is achieved. If the process takes a long time, then the grinding will be until the consistency of flour of different levels of grinding. The claims . The working body to the mill, comprising a shaft and a blade mounted on it, characterized in that. which, in order to improve grinding quality, the blade has the shape shown in the drawing. Phi & Z FIG. 4 Gg .6 FIG. 5 Ј-Ј AND .8 Ms Ј Fig.9