Design points of vibrating screen
In general, the ratio of length and width of the screen surface is 2~3. for coarse material screening and screen length is 3.5~4m; for the fine material screening and screen length is 5~6m; for the material's dehydration and sculping screen, screen length is 6~7m; the screen surface of pre screening can be short. The final screening of the screen surface should be longer.The screen width and length series, most of the arithmetic progression. It is more convenient to use, but because the mantissa neat. Arithmetic series relative difference is not balanced, with the sequence of growth, the relative difference will drop rapidly, therefore, in some screening machine series, can only use two series tolerances.Selection of wire here, screen surface, take the mesh size is 8mm, light steel wire diameter D is 2mm, the opening rate is 64%, the length and width ratio of 3:1.
The effect of length of screen surface material to be screened in the residence time on the surface of the screen. The screening test showed that the sieving time increases slightly, there are many less than sieve particles through the sieve surface through a sieve, so the screening efficiency is increased quickly. The experimental results show that the screen surface is longer, stay on the surface of the material in the sieve of time the longer the screening efficiency is high.But with the screening time increasing, the screen is easy to sieve particles less, leaving most of the hard particles, the particle size of the screen "material close to the aperture size of these particles. These particles are difficult to sieve through the sieve, take a long time, increase the screening efficiency is more and more slow. So, screen length only in a certain range, to play a role to improve the screening efficiency, not too long screen length, otherwise the screen heavy structure, reach the expected effect.
Selection of width and length of screen surfaceThe length and width of the screen is a very important process parameters of screen. Generally speaking, the surface of the screen width determines the processing capacity of the screen, the screen surface length determines the screening efficiency and screen so that the correct choice of the length and width of the screen, it is important to improve the production capacity and efficiency of the screen the extension.The width of the screen surface is not only affected by screen processing ability, is also affected by the screen structure strength. The greater the width will increase the screen size, the more problems need to be solved on the structural strength of screen is more difficult, so the surface of the screen width cannot be arbitrarily increased. The maximum width of the vibrating screen in China is 3.6m; the maximum width of resonance screen for 4m.
