Deutsche Babcock Aktiengesellschaft

Hermann Hennecke

Friedrich W Lautenschlager

Paul Mertens

Josef Krecher

A blower-beater mill for drying and milling material with a beater body and impeller arranged on the mill shaft. The beater arms of the beater body are fastened between hub rings on the shaft and water cooling is applied along the longitudinal axis of the mill shaft. The shaft is enclosed by a casing which extends to the impeller and is spaced from the shaft. In the region of the beater body, the casing has openings for the beater arms. The mill shaft also has hub rings between the beater body and the impeller. The casing is made up of U-shaped rings which overlap one or several hub rings. The rings have vertical legs inserted into passages between the hub rings. A passage behind the beater portion may be enlarged for fitting insert pins in the direction of the hub pins and lock washers may be placed between the front faces of the insert pins and the side faces of the hub rings. A gap may be located between the deflection disk of the impeller and the last U-shaped ring. The diameter of individual U-shaped rings may vary along the shaft.

Blower beater mill

A blower beater mill for grinding and drying operations in which a rotor is provided with a beater portion located on the mill shaft and has also a fan impeller. Beater arms of a beater portion are fastened between hub rings of the mill shaft. The shaft is water-cooled along its longitudinal axis. Shaft crests of the hub rings are enclosed by a jacket at a spaced distance therefrom. The jacket is made of individual rings through which the beater arms pass. The width of these rings is slightly larger than the spacing between two adjacent rows of beater arms. The rings, moreover, overlap in the area of cutouts of the beater arms. The rings may have U-shaped profiles with vertical legs inserted together with the beater arms into grooves between the hub rings. The space between two adjacent U-shaped rings and two adjacent beater arms, located within one beater arm row, is covered by sheet metal connected to the rings and the beater arms. The vertical legs of the U-shaped rings extend close to the bottom of the grooves and are penetrated by hub bolts holding the beater arms. The vertical legs, furthermore, may have cutouts at a level above the hub rings. A coolant gas source may be connected to the space between the rings of the jacket and the hub rings.

A blower beater mill in which a rotor has a beater portion provided with beater arms in the form of two interconnected parts. Beater arm bases are fastened in hub rings of the shaft of the rotor, and fastening elements of two beater arm portions are located above shaft crests of the hub rings. Cover elements are located axially with the rotor in a free space between the beater arm bases, and these cover elements are located on a diameter between the shaft crests of the hub rings and the fastening elements of the beater arm portions. Openings pass through the beater arm bases between the cover elements and the shaft crests of the hub rings in the axial direction of the rotor. An opening in one beater arm base is aligned with the opening in the corresponding beater arm base of the following beater arm rows. The cover elements have an outside jacket which surrounds the shaft crests of the hub rings at a distance. The jacket has cutouts for accommodating the beater arm bases. The cover elements, furthermore, are connected to the beater arm bases, and they are tip-stretched as lateral connecting pieces to the beater arm bases. The narrower side walls of the centered beater arm bases face the side walls of adjacent beater arm bases of the same beater arm row, at a slight distance.

Growing community of inventors

Mulheim, Germany

Hermann Hennecke