RU2089292C1 - Device for grinding materials - Google Patents

Abstract

FIELD: machines for grinding materials. SUBSTANCE: device for grinding materials has housing provided with longitudinal slots diminishing in the direction from loading port to unloading port. The housing internally accommodates a rotor, the outer surface of which has slots of similar shape and forms together with the housing an eccentric clearance. The unloading port of the housing has separation grid and sections of rotor and housing slots are associated by relation S $\genfrac{}{}{0ex}{}{\text{h}}{\text{min}}$ < S_p-r< S $\genfrac{}{}{0ex}{}{\text{h}}{\text{max}}$ , where S $\genfrac{}{}{0ex}{}{\text{h}}{\text{min}}$ and S $\genfrac{}{}{0ex}{}{\text{h}}{\text{max}}$ are sectional areas of the housing slots respectively near the loading port and unloading port, S_r is the sectional area of the rotor slot. Geometric form of the section of each slot of the rotor and housing is made up of a portion of an ellipse or a polyhedron. EFFECT: enhanced efficiency. 3 cl, 3 dwg

Description

 The invention relates to equipment for grinding materials, mainly grain, in agriculture.

A device for grinding grain crops, containing a loading hopper, a housing with an eccentrically arranged stator and rotor, the surface of which is made corrugated [1]
The disadvantage of this device is the low efficiency and reliability of the process of grinding materials.

 The purpose of the invention is to increase the efficiency of the grinding process and product quality.

 Figure 1 shows the device, a General view; figure 2 section of the device; figure 3 option profiles cross-sectional grooves of the housing.

к выгрузочному окну 8

и связаны соотношением: S $\genfrac{}{}{0ex}{}{\text{к}}{\text{min}}$ < S_p < S $\genfrac{}{}{0ex}{}{\text{к}}{\text{max}}$ где S_р сечение паза ротора, S $\genfrac{}{}{0ex}{}{\text{к}}{\text{max}}$ ; S $\genfrac{}{}{0ex}{}{\text{к}}{\text{min}}$ площади сечения пазов корпуса соответственно у выходного и загрузочного окон.The device for grinding materials includes a frame 1, on which a reversible drive 2 with a guarding element 3 is mounted and bolted 4 is attached to the housing 5 with side covers 6. In the upper part of the housing 5 there is a loading window 7 in the form of a funnel, and in its lower part - an unloading window a pipe 8, which at the junction with the housing has a separating grill 9. Inside the housing 5, the rotor 10 is eccentrically mounted on the bearings. The working surfaces of the rotor 10 and the housing 5 are gear-shaped with grooves 11, cross section which may be a part of a circle, an ellipse 12 or a regular polyhedron 13. The grooves 11 on the rotor 10 have the same sectional shape (S _p), and the grooves on the inner surface of the housing 5 are made of variable section (S ^A), decreasing from the feed box 7

to discharge window 8

and are related by: S $\genfrac{}{}{0ex}{}{\text{to}}{\text{min}}$ <S _p <S $\genfrac{}{}{0ex}{}{\text{to}}{\text{max}}$ where S _{p the} cross section of the groove of the rotor, S $\genfrac{}{}{0ex}{}{\text{to}}{\text{max}}$ ; S $\genfrac{}{}{0ex}{}{\text{to}}{\text{min}}$ the cross-sectional area of the grooves of the housing, respectively, at the output and loading windows.

 The inner surface of the housing 5 and the outer surface of the rotor 10 are eccentrically placed with the formation of a wedge gap 14.

 The device operates as follows. The grain from the loading window 7 is captured by the gear surface of the rotor 10 and, under the action of centrifugal and gravity forces, moves in the grooves of the housing 5 and the rotor 11, moving from one groove to another, i.e. mixing and grinding occurs. As the grain approaches the discharge window 8, the gap between the surfaces of the housing 5 and the rotor 10 decreases, and the cross section of the grooves of the housing decreases, intensive mixing and grinding of grain occurs. The crushed mass enters the grate 9 of the discharge window 8, is sieved and sent to the storage tank. The fraction that did not pass through the openings of the lattice 9 is captured by the teeth of the rotor 10 and transported to re-grinding with its regrind. The required size of the fraction of crushed grain is regulated by the wedge gap between the rotor 10 and the housing 5, as well as the installation of a grill 9 with the required hole size.

 The design of the device with a variable cross-section of the grooves allows you to grind the grain more intensively and get a fraction with the required particle sizes. The reversible movement of the rotor allows a more rational use of the device, taking into account the degree of wear of the housing surfaces.

Claims (3)

1. A device for grinding materials, comprising a housing with loading and unloading windows, the inner surface of which has grooves of predominantly regular geometric shape, while the depth of the grooves decreases in the direction from the loading to the unloading window, and a rotor is located in the housing, the outer surface of which has grooves similar forms and forms an eccentric gap with the housing, characterized in that the outlet window of the housing is equipped with a separating grate, and the cross-sections of the grooves of the rotor and the housing are interconnected by the ratio eat
S $\genfrac{}{}{0ex}{}{\text{k}}{\text{min}}$ <S _p <S $\genfrac{}{}{0ex}{}{\text{k}}{\text{max}}$ ,
where s $\genfrac{}{}{0ex}{}{\text{k}}{\text{min}}$ and S $\genfrac{}{}{0ex}{}{\text{k}}{\text{max}}$ - the cross-sectional area of the grooves of the housing, respectively, at the output and loading windows;
S _p the cross-sectional area of the groove of the rotor.  2. The device according to claim 1, characterized in that the geometric shape of the cross section of each groove of the rotor and the housing is formed by a part of an ellipse or polyhedron.  3. The device according to claim 1, characterized in that the eccentric relative position of the housing and the rotor is made by mixing the axis of rotation of the rotor in the direction to the output window of the housing, and the inner surface of the housing has a regular cylindrical shape.

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