Vertical Screw Conveyor
Passing on rule and qualities
Vertical screw conveyor(also called vertical winding carrier or wood screw), the structure guideline is as per the following: In picture 15-21, the nourishing of the vertical screw transport is for compulsory sustaining, when it's running, screw 2，4 to do the rotating movement. The passing on material will enter from level sustaining delta 1, experiences the running flat encouraging screw 2 and to be passed onto the vertical part, then to be push up to the outlet 6 for release by vertical screw 4.In picture 15-22, the bolstering of vertical screw transport is for Auto-stream sort, when the transport is working, screw 2 to do rotating movement, the material to be entered from channel 1, and to be push up to the outlet 4 for release by vertical screw 2.
At the point when the vertical screw doing the revolving with precise speed ω, the question ｍ as the endless supply of the sharp screw edge will be taken after the pivot. In the mean time there is the radiating power on items F＝ｍrω2, the protest under the activity of diffusive drive F, there will be three potential outcomes as underneath.
1）When a radial constraint is not as much as the grinding between the screw surface and question, the protest will dependably be rotational alongside the bolt; won't quit for the day shell, therefore difficult to be push up.
2）When diffusive constraint is more than the erosion of the screw surface and protest; the question will shut everything down shell. In any case, when the erosion amongst question and shell is insufficient to conquer the grinding amongst protest and surface of screw cutting edge, and can't beat the segment constraint. which is brought on by its particular weight and down along the surface of the screw, then protest will dependably be rotating alongside the screw as well, and difficult to be push up too;
3）When the grinding amongst question and shell is more prominent than the grating amongst protest and surface of the screw, and the segment compel brought about by its particular weight and down along the surface of the screw as well, the protest will slide with screw surface and ascending. along the other way of the winding direction, implies that protest is to push up by a vertical piece of the screw, in this way to accomplish the vertical transportation.
In this way, the rotating velocity of vertical screw shaft must be higher than an esteem which is the items can be push up (called basic speed). The passing on operation cannotcontinue; it is the principle normal for the vertical screw transport.
Nourishing of vertical screw transport must keep the considerableweight when a lesser contrast for encouraging, vertical screw transport is all outfitted with even screw sustaining. By and large, the even bolstering screw and the vertical screw will consolidate to be 1 finished transport, the measurement of the flat nourishing screw is same as the vertical screw, and the RPM of the level screw is lower than the vertical screw.
The upside of the vertical screw transport is: Simple structure, Small spatial area, Easy for impermeable transportation, cost is low. Its weaknesses arelow limit, passing on tallness is lower (Normally under 8M).
1）Vertical screw transport is reasonable for moving on different fine and granular materials, for example, carbon dark, flour, bond, sand, grain and renewable elastic powder, and so forth.
2）Vertical screw transport is not reasonable for passing on the materials what is anything but difficult to perishable or high consistency, agglomerate, destructive.
3）Range of working temperature is inside －20~50, the temperature of the passing on material ought to be lower than 200℃.