D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
92/55
D21D 1/22 (2006.01) D21B 1/14 (2006.01)
Patent
CA 1320864
ABSTRACT The invention relates to a crushing or grinding element for drum refiners for the crushing or grinding of fibrous material with an engine-driven rotor, the element being attachable to the rotor shell, conveniently at least one surface of revolution inclined to the rotor axis or extending approximately normally thereto and provided with crushing or grinding elements with a diameter increasing away from the material feed as well as optionally, if at least two surfaces of revolution inclined to the rotor axis or extending approximately normally thereto and having comminuting elements or the like are provided, some of them of opposing inclination to the rotor axis, channels or bores for the discharge of steam spaced form the material feed being provided on the crushing or grinding surfaces provided on the rotor shell and optionally the rotor shell itself, one end of said channels or bores piercing the crushing or grinding surfaces and optionally their supports and being provided in the working area of the crushing or grinding elements provided on the surfaces of revolution inclined to the rotor axis or extending approximately normally thereto and their other end emptying into channels or bores extending approximately normally to the steam discharge channels or steam discharge bores. The invention is mainly characterized in that the crushing or grinding element(s) is (are) formed as cylinder segment(s) (2') having anchoring projections (12) of hammerhead-like cross section on the side facing the rotor axis and engageable in corresponding rotor grooves (13) of hammerhead-like cross section, and that said cylinder segments (2') serve for the discharge of steam. (Fig. 3).
615634
Bergloff Dag
Bernhard Emmerich
Henriksson Sven-Erik
Kappel Johannes
Lileg Johann
Maschinenfabrik Andritz Actiengesellschaft
Swabey Ogilvy Renault
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