Hammermill with stub shaft rotor apparatus and method

Details Hammermill with stub shaft rotor apparatus and method Hammermill with stub shaft rotor apparatus and method

2006-04-11

2006-04-11

Rosenbaum, Mark (Department: 3725)

Solid material comminution or disintegration

Apparatus

Rotary striking member, rotor structure

Reexamination Certificate

active

07025294

ABSTRACT:
An improved rotor design for hammermills. The invention eliminates the solid rotor shaft and replaces it with a tubular structure comprised of two stub rotor shafts with plate flanges and grooved spacer rings therebetween. End head disks, attached to the plate flanges, and intermediate disks are concentrically positioned with the axis of rotation of the assembly. The intermediate disks are held in alignment by the pilot groove located in the spacer rings. The flanges, stub shafts, spacer rings and intermediate disks are supported and held in proper alignment by tension rod compression. The resulting tubular rotor shaft assembly is less massive, more stiff, less susceptible to vibration, has a reduced bending stress, is less expensive to startup and operate and less expensive and more flexible in terms of component inventory than known solid through-shaft rotors.

REFERENCES:
patent: 3779470 (1973-12-01), Smits
patent: 4925114 (1990-05-01), Ostergaard
patent: 5188303 (1993-02-01), Hoof

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