Screening device

FIELD: agriculture.

SUBSTANCE: device comprises rotating cylinders provided with polymeric cell sides, front and back distributors, transmitting mechanisms, and frame. The cylinders receives chutes provided with screws. The front and back distributors are provided with means for supplying and discharging the grain material and admixtures.

EFFECT: enhanced efficiency.

3 dwg


The present invention relates to machines for sorting grain mixtures along the length of the grains and can be used in agricultural production, milling and grain Elevator and feed mill industry.

To separate short and long admixtures used are blocks, for example, HEAD-A [1], comprising a rotating cylinder with a mesh inner surface, inside which are the gutter with screws, front and rear valves, mechanisms of transmission and the frame. The disadvantage of this indent block is the same frequency of rotation of the cylinder (the same kinematic regime K=ω2·R/g) to allocate short of impurities (puppet) and long impurities (Oswego), which reduces the effectiveness of screening, since the time of deposition of the cells of short particles and full grains significantly different.

Known indent block-TO-A (Germany) [2], whose puppet and sugny cylinders have different (optimal) kinematic mode. Puppet cylinder has ToTo=0,58, sugny - KAbout=0,65.

The disadvantage of this indent block is the rapid wear of steel wire mesh surface.

It is also known technical solution [3], which allows to increase 1.5-2 times the service life indent block-A through the use of cellular surface of p the polymer material.

The disadvantage of this technical solution is low screening efficiency of grain mixtures for selection of short and long of impurities due to lower values of the coefficient of friction of the grains of polymer surface compared to steel.

The problem to be solved is to improve the efficiency of screening of the grain material along the length of the grains due to the optimum kinematic regime puppet and Oswego indent cylinder, made of a polymeric material.

The problem is solved by using the indent block containing rotating puppet and sugny cylinders with polymer mesh surface, inside which are the gutter with screws, front and rear valves, mechanisms of transmission and the frame, in this kinematic regime puppet cylinder ToTo=0,6...0,7 and Oswego - KAbout=0,8...0,9.

Improving the efficiency of screening is achieved by raising short of particles in a puppet cylinder and full grains in osogna the cylinder to a height that provides a sharper drop them from the cells into the appropriate chute.

Figure 1 schematically depicts the indent block, as in figure 2 and 3 - the influence of kinematic mode To on screening efficiency.

Indent the block contains a rotating doll 1, sugny 2 cylinders with polymer clay is Noah mesh surface, inside which are the troughs 3, 4 with screws 5, 6, the front 7 and rear 8 distributors. The rotation of the cylinders is driven by the engine and transmission mechanisms 9, 10. All this is mounted on the frame 11. The front 7 and rear 8 distributors have a loading mouth 12, zeroprofit 13 season 14, 15, 16 to print short, long, impurities and clean grain.

Workflow cylinder Trier is as follows.

Grain material is loaded into the loading orifice 12 are block and is supplied to the cellular surface of the rotating puppet cylinder 1. Short impurities are placed in the cell rises to a certain height, thrown in the gutter 3 and displayed by a screw 5 in estrus 14 short of impurities. Grain material with long impurities, not put in a cell, it displays the gathering of the cylinder 1 and zernoparovogo 13 is supplied to the rotating sugny cylinder 2. Grains are the main crops are placed in the cell, go up the cylinder, thrown in the gutter 4 and displayed by a screw 6 in estrus 16 clean grain. Long impurity, not included in the cell, the vanishing removed from the cylinder 2 into the chute 15.

Experimental studies indent block-A, equipped with a cellular polymer surface mounted (figure 2 and 3)that the optimal kinematic regime puppet cylinder is ToTo=0,6 0,75...and Oswego - is About=0,8...0,9. Due to the large values of the kinematic regime than in the prototype, is achieved most clear separation of short and long impurities and the main grain and is tasked with improving the efficiency of the screening of the grain material. The cleaning efficiency of the grain material from short impurities increases from 65 to 67...69%, and from long impurities from 55 to 68...69%.


1. Machinery for post-harvest grain handling / Bisognin, Ipharmacy, Try, Vimalagiri. - M.: Agropromizdat, 1987. Pp.61-66.

2. Cellular Trier TO-A, R-A, A. Instruction manual, GDR/Vote, 5909, 4th edition, 1987.

3. Balagurov CENTURIES, Lykov S.A., Rudakov BM Modern technological solutions in grain cleaning equipment.//Machinery and equipment for the village. - 2002. No. 2. - P.9.

Indent the block containing the rotating puppet and sugny cylinders with polymer mesh surface, inside which are the gutter with screws, front and rear valves, mechanisms of transmission and the frame, characterized in that the kinematic regime puppet cylinder ToTo=0.6 to 0.75, and Oswego - KAbout=0,8-0,9.


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