The result shows that several forces act upon separator together, making materials in different heights form velocity grades in both positive and negative directions and move towards respective direction, producing helical motion on cross section.

Taking the working principle of the imported material receiving machine as reference, an automatic material receiving machine was designed with the mechanical part adopting the combination of winding reel spiral motion and floating core structure, and with the electrical part adopting silicon_controlled DC servo motor.

Although spin about a principal axis is a common technique for providing attitude stabilization of simple spinner spacecraft, some balancing uncertainties often produce a spiral motion rather than the pure spin about the angular momentum vector.

We got that,the charged particles be binded in this field,and canonly move along the magnetic line of force as spiral motion and the positive charges andnegative charges moved in opposite direction which be fromed the big molecular groups thatbe hardly absorption,by means of incrustation preventing.

After introducing the basic knowledge of geometric algebra such as outer product,inner product and geometric product,this paper focused on the CGA description and computation with graphic reflection,rotation,translation,rigid body motion and screw motion,and gave the experimental demonstrations.