Solid material comminution or disintegration – Apparatus – Rotary striking member with circumferential or tangential flow
Patent
1993-05-11
1994-11-15
Eley, Timothy V.
Solid material comminution or disintegration
Apparatus
Rotary striking member with circumferential or tangential flow
241194, 2412851, B02C 1304
Patent
active
053640381
ABSTRACT:
A hammermill (10) comprises a casing (12) having a longitudinal axis (18) and a sidewall (20) such that an enclosed grinding space (24) is defined within the casing. A rotor assembly (26) is situated within the casing for rotation about the axis, and includes hammer elements each having a radially outer tip (34) which defines a hammer rotation diameter. At least one grinding plate at the inside of the sidewall defines a grinding surface (38) in the grinding space having a radius of curvature centered on the axis, a length dimension parallel to the axis, and a width dimension defined by an arc about the axis. The grinding plate has a plurality of spaced apart edges such that each hammer tip (34) passes along the width dimension of the grinding plate with a clearance from the edges which defines a grinding gap. The sidewall other than at the grinding plate has a non-uniform curvature which defines a non-uniform clearance from the hammer rotation diameter that is greater than the grinding gap clearance. The non-uniform curvature includes at least one sidewall portion having a radius of curvature less than that of the grinding surface.
REFERENCES:
patent: 1772533 (1930-08-01), Battey
patent: 1936025 (1933-11-01), Mahaffey
patent: 3677478 (1972-07-01), Schutte
patent: 4907750 (1990-03-01), Seifert
patent: 5062575 (1991-11-01), Barnabie et al.
Andritz Sprout-Bauer, Inc.
Eley Timothy V.
Husar John M.
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