B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
241/27
B02C 1/00 (2006.01) B02C 2/04 (2006.01) B02C 19/16 (2006.01)
Patent
CA 1187849
ABSTRACT OF THE DISCLOSURE A mill or crusher useful for crushing and grinding material employing mechanical vibratory drive force at a sonic frequency. A drive shaft having orbiting eccentric weight means fixedly attached thereto is rotatably driven by a drive motor to generate quadrature related vibratory force components in the drive shaft. Rotatably supported on the drive shaft by means of suitable bearings is a driving member having mass (inductive) inertia in said sonic frequency range. A "slave" member is freely supported on vibration isolation members in external concentricity with the driving member so that it is effectively in a "floating" condition, thus presenting a mass reactance in said sonic fre- quency range. Material to be milled or crushed is fed in the gap between the driving member and the free-floating "slave". Cycloidal force is delivered from the shaft to the driving member to precess or roll around on the inside wall of the free floating slave member. Vibratory energy developed in this gap effects grinding or crushing action on the material fed therebetween. The reactive force between the inductive driving member and the slave member is dependent upon the mass reactance of the slave member and the nature and quality of the material in the gap between these two members which affects the sonic coupling be- tween reactances of the free floating driving and free floating slave members. Thus, the vibratory energy to which the material is subjected is a function of the driving inertia of the driving member, of the hardness of the work material and the mass (induc- tive) inertia of the slave member, the force applied to this work material being limited by these three factors. Thus, we have a sonic frequency radial vibratory force acting on the material in the gap along with a crushing force provided by the precessional motion of the slave member around on the driving member, this precessional motion resulting in a shear crushing force.
413155
Bodine Albert G.
Hirons & Rogers
LandOfFree
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