| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to screening rocks and construction materials, crushing and sorting jobs, and screen sizing of construction materials. Screen comprises screening surface, drive, loader and unloader. Housing features helical shape with polygonal helical surface along its inner and outer edges and is composed of sections made up of two subsections. The latter are made up of bands flexed in one side along straight creases inclined to band edges and coiled to form, over band length, the different-side equilateral, isosceles and scalene triangles. Sides of triangle differ by one linear magnitude multiple of delta. After coiling the band, band edges of lines magnitude smaller by four deltas than the side of largest equilateral triangle are interconnected to make subsections. Said subsections have square-like opening on their one side, opening side being smaller than that of the largest equilateral triangle by three deltas. On opposite side, they have opening shaped to isosceles trapezium with larger base equal to side of the largest equilateral triangle and smaller base smaller than larger base by three deltas. Trapezium sides are smaller than larger base by two deltas. Aforesaid subsections are connected by trapezium-shape openings to make square-like sections with inlets and outlets, square sides being equal. Said openings are arranged at an angle ? its magnitude defining the working chamber helical shape. Said sections are connected to make screening surface and turned relative to each other. Every next section is turned through 90 degrees relative to each other clockwise. Then, every next section is jointed with turn in reverse direction, also, through 90 degrees.EFFECT: expanded operating performances, decreased length.15 dwg |
