Cooling medium injection for pellet mill rollers
AssigneeConsolidated Process Machinery, Inc.
InventorBrendan J. Wallace
Life of this patent
Estimating the term…
Abstract
The pellet mill includes a ring die having die openings and rollers within a die cavity defined by the ring die whereby material fed to the die cavity and in the nips between the rollers and ring die is extruded through the openings to form pellets. The roller shafts are cooled by a water injector comprised of a tube disposed within and spaced radially from the interior surfaces of a bore through the roller shaft. A fitting at one end of the tube has an inlet for supplying cooling water to the interior of the tube. A return passage for the heated cooling medium is provided in the annular space between the tube and the bore terminating in an outlet in the fitting. In this manner, the roller bearings and lubricant are cooled.
Claims12
A pellet mill comprising:
- a ring die defining a die cavity, said ring die having an axis and circumferentially and axially spaced die openings;
- a carriage mounting a plurality of rollers in said die cavity, said rollers being mounted on shafts carried by said carriage and having axes parallel to said axis of the ring die;
- a feeder for supplying feed material into said die cavity;
- a drive for rotating one of said ring die and said carriage relative to another of said ring die and said carriage for extruding feed material in the nips between the ring die and the rollers through the die openings to form pellets;
- bearings disposed between said shafts and said rollers;
- cooling medium supply and return passages in each of said shafts generally parallel to said axes thereof;
- and
- a cooling medium inlet carried by each said shaft for supplying a cooling medium to said supply passage for cooling said bearings and a cooling medium outlet carried by each said shaft for receiving heated cooling medium from said return passage.
A pellet mill comprising:
- a ring die defining a die cavity, said ring die having an axis and circumferentially and axially spaced die openings;
- a roller in said die cavity, said roller being mounted on a shaft having an axis parallel to said axis of the ring die, said shaft having a bore hole opening through one end of said shaft;
- a feeder for supplying feed material into said die cavity;
- a drive for rotating one of said ring die and said roller relative to another of said ring die and said roller for extruding feed material in the nip between the ring die and the roller through the die openings to form pellets;
- bearings disposed between said shaft and said roller;
- a cooling medium transmission device for supplying a cooling medium to said shaft for cooling said bearings and including a tube receivable in said bore hole and spaced from walls of said shaft defining an annular passage thereby defining a cooling medium supply passage through one of said tube and said annular passage and a cooling medium return passage through another of said tube and said annular passage;
- and
- a cooling medium inlet carried by said device for supplying a cooling medium to said supply passage and a cooling medium outlet carried by said device for receiving heated cooling medium from said return passage.
Dependencies are inferred from the claim text.