| 摘要 |
A planetary mill (1) adapted for the continuous grinding of granulated material into fine powder is disclosed. A grinding chamber (3) is provided that is continuously orbited in a planetary motion. As the chamber (3) undergoes its planetary motion it is caused to undergo a rotation about its own axis at the same rate and in an opposite sense to the planetary rotation. As a result the grinding chamber has no net rotation with respect to an external observer and can be connected to any number of external connections (50, 51) without the use of rotating seals provided the drive (6) for the planetary rotation is external to the locus of points encompassed by the path of the connections as the system rotates. Preferably the chamber (3) is a cylindrical tube and the ratio of the orbit radius of the planetary motion is 2.15 times that of the tube so as to cause a cascade angle of about 45 degrees of mill mix and media in the orbiting tube which angle is independent of the rotation rate of the mill at reasonable speeds. |
