Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1997-08-29
2000-06-06
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
210219, 210220, 2102211, 366264, 74573F, 74574, 261 93, B03D 116, B03D 118
Patent
active
060707348
ABSTRACT:
Excessive vibration in industrial mixers such as flotation cells and draft tube mixers is attenuated by connecting a vibration dampening device to a rotor or impeller which is disposed in a mixing tank for pumping a nonhomogeneous fluidic material placed in the tank. In a draft tube mixer, where the rotor is connected to a drive shaft in turn connected to a motor for rotating the rotor, the vibration dampening device is connected to the shaft on a side of the rotor opposite the motor. In a froth flotation cell, if the rotor is hollow, the vibration dampening device is disposed inside a pipe in turn mounted inside the rotor along an axis thereof. The vibration dampening device takes the form of a tuned mass dampener tuned to a resonance frequency of the particular mixing apparatus.
REFERENCES:
patent: 3491880 (1970-01-01), Reck
patent: 5344235 (1994-09-01), Weetman
patent: 5356569 (1994-10-01), Von Berg
Greenhill Lyn Maurice
Greenlee Dennis M.
Hunt Jerry W.
Baker Hughes Incorporated
Coleman Henry D.
Lithgow Thomas M.
Sudol R. Neil
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