一、多倾角的筛面筛面上任一横断面的床层厚度,等于物料流动容积速度除以物料流动线速度和有效宽度。如果物料移动的线速度为恒定,由于细颗粒物料通过筛孔,物料流动速度必然下降,因而床层厚度也必然下降。因此,为使得沿整个筛面筛下物的通过速度为恒定,筛上物料的厚 First, the multi-angle sieve screen surface of any cross-sectional thickness of the bed, equal to the material flow volume velocity divided by the material flow velocity and effective width. If the material moves at a constant linear velocity, as the fine particle material passes through the mesh, the material flow rate will inevitably decline, so the bed thickness will inevitably decline. Therefore, in order to keep the passing speed of the material under the screen surface constant, the thickness of the material on the screen is increased