(57) The invention concerns grinding mills of the kind that comprises a circle of grinding
rings (1) held between a fixed upper grinding ring (2) and a lower rotatable grinding
ring (3a). The lower ring (3a) rests on a support table (4) through a hump (10) projecting
from the lower surface of the ring (3a). If the edge of the table should tilt, due
to load, say, then the point of contact of the hump (10) and the table (4) will move
along the hump (10), so that the moment acting on the ring (3a) will remain approximately
constant. The centre of the hump (10) may lie on the vertical passing through the
centre of the balls (1) or just radially outwardly of this, to take account of the
centrifugal action in operation on the balls. An alternative form of hump is in the
form of a flat bottom and two sides that incline gradually away from the plane containing
the bottom.
|
|
