Screening Machines

Current screening machines have one thing in common. They all work using electrical motor with a rotating unbalance that generates the shaking. These electrical unbalance motors are bulky and require high maintenance. Furthermore, they waste much of their energy due to useless elastic deformation of the heavy supporting structure, audible and vary loud noise, and excess heat. The latter causes many of the moving components, such motors had a replacement rate of 60 per year instead of the manufacturer recommendation of 20 per year. In this case, the replacement criterion was bases on functionality of motors. It is anticipated that if the replacement criterion is bases on the motors-generated noise, the annual replacement rate would have been significantly increased.

A conventional material screening machine is comprised of four primary and four secondary parts. The primary parts include the key moving components, such as engine, live deck, sieves, and sieve tensioning mechanism. The secondary parts include the non-moving components, such as feed system, supporting structure, hopper, and oversize bins. An electrical engine provides the required shaking by using an unbalanced rotating mass. An engine rests on the live deck on which a sieve tensioning mechanism is installed. The sieves, that do the material separation, are supported by the tensioning mechanism.

ВАРІАНТ IV