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US 2021/0213485 A1Published application
Vibrating screen feeder process
AssigneeKinergy Corporation
InventorGeorge D. Dumbaugh
Life of this patent
Estimating the term…
Abstract
A vibrating screen feed conveying apparatus for conveying and separating sticky “moisture laden bulk solids” which are sticky and wet flowing onto a vibrating screening feeder and into a hopper. The apparatus includes a bed on which material is conveyed, a longitudinal counterbalance supported on a plurality of isolation springs, a plurality of inclined drive springs extending between the bed and the longitudinal counterbalance, and a plurality of stabilizers for controlling movement of the drive springs along their central axes. A plurality of vibratory motors, each having rotatable eccentric weights are attached to the rear end of the longitudinal counterbalance. The eccentric weights rotate in phase with one another to vibrate the bed at a vibration frequency.
Claims20
A vibrating conveyor screening and feeding process for conveying materials including the steps of:
- providing a bed having an inlet end and an outlet end on which material is adapted to be conveyed in a direction;
- providing a plurality of drive springs, each drive spring having a first end attached to said bed and a second end attached to a support, each said drive spring adapted to compress and extend along a line of stroke;
- providing a plurality of stabilizers attached to said bed, each said stabilizer being more rigid in a direction transverse to said line of stroke than said stabilizer is rigid in the direction of said line of stroke;
- providing a first vibratory motor having a first rotatable eccentric weight adapted to state about a first axis, a second vibratory motor having a second rotatable eccentric weight adapted to rotate about a second axis, a third vibratory motor having a third rotatable eccentric weight adapted to rotate about a third axis, and a fourth vibratory motor having a fourth eccentric weight adapted to rotate about a fourth axis, said first and second axis being located substantially in a first plane and said third and fourth axes being located substantially in a second plane, said second plane being non-coplanar with said first plane said first and second axes being spaced from said third and fourth axes along the direction the material is conveyed, said eccentric weights being free-wheeling with respect to one another, each said vibratory motor adapted to operate at substantially the same operating speed and to provide an output force generally perpendicular to its axis of rotation, said rotatable eccentric weights adapted to accumulatively synchronize with one another without being rotationally coupled to one another such that the combined resulting output force of said first pair of rotatable eccentric weights is generally parallel to said line of stroke and the combined resulting output force of said second pair of rotatable eccentric weights is generally parallel to said line of stroke;
- operating said vibratory motors to rotate said eccentric weights, such that said rotating eccentric weights accumulatively synchronize and accumulatively add their output forces and their respective power outputs and thereby vibrate said bed along said line of stroke at a vibration frequency;
- and
- operating each said vibratory motor at substantially the same selected operating speed which approaches being equal to, or is less than, the natural frequency of said drive springs which are vibrating said bed.
4 more elements
A vibrating screening and feeding process for conveying material comprising the steps of:
- feeding a material having particles of various sizes from a hopper into a down chute onto a vibrating screening unit including a housing and a vibrating screen;
- spreading said biomass particles across a selected width of a feed plate of said vibrating screening unit from said hopper including a outlet interfacing with an inlet chute of said vibrating screening unit, said inlet chute including a baffle of 30 to 60 degrees for a vibration drive isolation assembly for vibrating said vibrating screening unit;
- said vibration drive isolation assembly including a longitudinally extending longitudinal counterbalance member, aa plurality of drive springs supported by said longitudinal counterbalance member with said drive springs being distributed across at least the width of said vibrating screening unit, at least one vibratory drive motor installed on said longitudinal counterbalance member, a plurality of isolation springs supporting said longitudinal counterbalance member;
- controlling a vibratory stroke of said at least one vibratory drive motor at 50 Hz for 25 seconds and a pulse stroke of at least 60 Hz from 3 to 5 seconds with an electrical control means including a standard variable frequency (VFD) combined with an adjustable timers and an adjustable output;
- and
- timing a cycle wherein said electrical control means enables a full output adjustment by adding said standard variable frequency (VFD) combined with adjustable timers whereby a vibratory stroke has an automatic capability of a momentary pulsing to at least 60 hertz for 3 to 5 seconds generating a pulse to said vibratory screen for clearing screen media of a biomass particle stuck in a screen opening and break free accumulated layers of biomass particles adhering to the surface of said vibratory screen.
3 more elements
A vibrating screening and feeding process for conveying material comprising the steps of:
- feeding a material having particles of various sizes from an input hopper having a vibratory motor into a down chute onto a vibrating screening unit including a housing and a vibrating screen;
- spreading said biomass particles across a selected width of a feed plate of said vibrating screening unit from said hopper including a outlet interfacing with an inlet chute of said vibrating screening unit, said inlet chute including a baffle of 30 to 60 degrees for a vibration drive isolation assembly for vibrating said vibrating screening unit;
- said vibration drive isolation assembly including at least two spaced apart longitudinal counterbalance members supported by a plurality of spaced apart upward extending coil steel isolation drive springs mounting vertically in compression extending downward from selected positions from said at least two spaced apart longitudinal counterbalance members, said vibration drive isolation assembly including at least one electric vibratory drive motor, and said vibrating screening unit including an input hopper feeding a screen housing including at least one screen and at least one output aperture for removal of oversize material from said at least one screen and a pan assembly for conveying screened material therefrom, said vibrating screen unit fixedly supported to free ends of said plurality of spaced apart upward extending coil steel isolation drive springs extending upward from each of said at least two spaced apart longitudinal counterbalance member, said screen housing attaching to free ends of a plurality of flat bar stabilizers comprising a plurality of leaf springs extending from each one of said at least two spaced apart longitudinal counterbalance members to said vibrating screening unit for guiding the movement of said plurality of spaced apart upward extending coil steel isolation drive springs, and said vibration drive isolation assembly mounting to a rear end of said at least two spaced apart longitudinal counterbalance members, each one of said at least one electric vibratory drive motors comprising a plurality of three phase electrically adjustable variable speed alternating current motors each one having an output shafts extending from a top end and a bottom end of said output shaft including an unbalanced eccentric weights mounted on said output shaft;
- setting said plurality of three phase electrically adjustable variable speed alternating current motors in mechanical time with one another;
- adjusting an output running speed of said plurality of three phase electrically adjustable variable speed alternating current motors to a frequency which is less than a natural frequency of said plurality of spaced apart upward extending coil steel isolation drive springs;
- adjusting vibration intensity during a timed cycle of said variable speed AC motors having a programmable controller including a standard variable frequency (VFD) combined with an adjustable timer to have an output having a vibratory stroke of at least 60 hertz for a time of 3 to 5 seconds generating a pulse stroke to said screening unit for clearing and for breaking free accumulated layers of cohesive particles;
- driving said AC motors each having weights synchronized with one another at a selected speed and of periodically changing said speed for a selected time interval by a selected amount;
- producing a portion of a load that opposes a vibratory motion with said plurality of spaced apart upward extending coil steel drive springs;
- guiding said vibratory motion with said plurality of flat bar stabilizers;
- and
- producing a load that resists said vibratory motion with said plurality of alternating current motors.
8 more elements
Dependencies are inferred from the claim text.