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US 2020/0331029 A1Published application
Screening machine for screening material according to size
AssigneeDynamic Screening Systems Limited
InventorRalph NABERG
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AssigneeDynamic Screening Systems Limited
InventorRalph NABERG
Estimating the term…
A circle throw screening machine for screening particulate material according to size is described. The machine comprises a housing (2) having a longitudinal aspect, an upper perforated deck (7), a frame (3) configured for mounting the housing, and a suspension system (4) for mounting the housing to the frame and configured to allow vibration of the housing relative to the frame. Three rotatable unbalanced drive shafts (5) are coupled to the housing (2) and configured to vibrate the housing in response to rotation of the drive shafts, wherein the three rotatable unbalanced drive shafts are equally spaced along the longitudinal aspect of the housing. A drive mechanism (6) is coupled to the unbalanced drive shafts (5) and configured to effect synchronous rotation of the three drive shafts in the same direction. The machine can achieve high acceleration of 6.4G and 9.7G through the use of two or three parallel shafts respectively (NB. 2 shafts is suffice for a G of 6.4 and 3 shaft is suffice for 9.7G) distanced from each other by a distance of about one quarter of the length of the deck, configured for synchronous rotation.
A circle throw screening machine for screening particulate material according to size, the machine comprising:
A circle throw screening machine according to any preceding claim in which the drive mechanism (6) comprises a single motor (23) configured for synchronous rotation of the three drive shafts.
A circle throw screening machine according to any preceding claim wherein the drive mechanism (6) comprises three external drive shafts (22), each of which is coupled to an unbalanced drive shaft by a constant velocity joint.
A circle throw screening machine according to any preceding claim in which each drive shaft is mounted to the sidewalls (10) of the housing (2) in a manner that allows rotation of the unbalanced drive shafts (5) relative to the housing and translation of vibrational movement of the shafts (5) to the housing.
A circle throw screening machine according to any preceding claim in which an unbalanced weight (20) is disposed on each end of each of the unbalanced drive shafts (5).
A circle throw screening machine according to any preceding claim including a plurality of lower decks including at least one perforated lower deck (8).
A circle throw screening machine according to any preceding claim, in which the three unbalanced drive shafts extend laterally across the deck orthogonal to the longitudinal aspect of the deck.
A circle throw screening machine according to any preceding claim, in which the drive shafts (5) are parallel to each other and orthogonal to the longitudinal aspect of the housing.
A circle throw screening machine according to any preceding claim, in which the upper perforated deck (7) has a mesh size of between 0.025 mm and 1 mm.
A circle throw screening machine according to any preceding claim, in which the upper perforated deck (7) has a mesh size of between 2 mm and 50 mm.
Dependencies are inferred from the claim text.