SU758681A1 - Screw extruder - Google Patents

Abstract

Auger press containing a feeder, a zeer chamber and a stepped auger shaft. made in the form of a set of inserts with turns, differing from the fact that, in order to increase the degree of squeezing of materials and press performance, the inserts are made with different magnitude of the turns of turns with a ratio of steps ranging from 1:17 to 1:25, inserts with an increased step turns are made multiple at a time when inserts with various steps are placed. ate 00 a oo

Description

The invention relates to mechanical engineering and can be used for squeezing, for example, oil from oilseeds and other oil and moisture-containing materials. 5

Known screw press containing a feeder, a grain chamber and a stepped screw shaft, made in the form of a set of inserts with turns [1]. 1Q

The disadvantage of this press is the low degree of extraction of the material and low productivity.

The purpose of the invention is to increase the degree of squeezing of the material and the productivity of the press.

This is achieved by the fact that the inserts are made with a different step of the turns with a ratio of steps ranging from 1:17 to 1:25, 20 inserts with an increased step of the turns are multi-start, while the inserts with different steps are placed nearby.

In FIG. 1 is shown auger shaft 25 press; on the FIG. 2 - section A- A on the FIG. TO in FIG. 3 - incision Bb on the FIG. g in FIG. 4 - incision in on the FIG. 1. Screw shaft proposed press thirty sa includes from the set individual inserts 1- 9. Inserts 5, 7 and 9 you-

are filled with a step of turns increased in comparison with the adjacent inserts. The ratio of steps is in the range from 1:17 to 1:25. In this case, the turns of the inserts 5, 7 and 9 are multi-start. A periodic change in the steps of the turns in the oil press provides the frequency of compression and stretching of the pulp. At the same time, additional pores and channels are formed in the pulp, which increase the flow of oil towards the Zeur, which results in an increase in the oil yield. The increase in the steps of individual turns has a positive effect on the growth of press productivity. An increase in the lead-in of these turns increases the degree of uniformity of the movement of the pulp, sharply reducing the countercurrents of the pulp.In addition, small steps are limited in the direction of their reduction by the inadmissibility of a further decrease in the angle of friction, and in the direction of their increase by the restriction on the value of radial pressures.

The limits of large steps are limited by the conditions of the optimal degree of expansion of the material with its subsequent compression.

The number of turns of turns can be from 2 to 4 and is limited by the conditions for optimal reduction of the counter flow of the pulp and the maximum reduction in the working volume of turns, depending on the performance of the press.

Fig. 3 Fig. C

ВНИИПИ Order 285U / 4 Circulation 634 Signed

Branch of the PPP Patent, Uzhgorod, Project 4,

Claims (1)

AUGER PRESS, comprising a feeder, a grain chamber and a stepped screw shaft. made in the form of a set of inserts with turns, characterized in that, with a chain for increasing the degree of squeezing of materials and productivity of the press, the inserts are made with a different step pitch with a ratio of steps ranging from 1:17 and 1:25, inserts with an increased step the turns are made multi-start while inserts with different steps are placed nearby. Joint venture Q0 oo