US 12,673,829 B2Granted

Conveyor linear drive for continuous bulk material conveying device

AssigneeHaka Groups Participacoes De Negocios S/A

InventorFrederico Trad

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Abstract

A double-face linear motor with a short primary and a segmented secondary for use in belt conveyors where rotary motors are predominantly used. The primary remains fixed and static, firmly connected to the conveyor structure and the secondary follows the belt that moves in a closed loop in a vertical plane around return drums. This motor improves the efficiency of conventional conveyor belts using rotary electric motor units in their head drums. The method includes electromagnetically moving by induction the secondary blades made of a conducting material as they pass between the active faces of the motor primary where multiphase coils are arranged. The secondary blades are fastened to the belt and moves the belt by electromagnetic forces generated in the primary. The long-segmented secondary makes a distributed linear drive because the segments formed by the blades adapt to the loop path formed by the return drum of the belts.

Claims1

Dependent claims

A linear drive for continuous bulk material conveying device comprising:

a conveyor belt (15);
a plurality of linear induction electric motors (18) arranged along a length of the conveyor belt (15), the linear induction motors (18) are synchronized by a drive, the induction electric motors (18) having a short primary (14) having a first face (08a) and a second face (08b) located on opposite sides of the short primary (14) forming a gap for the passage of a long and segmented movable secondary, the short primary (14) including copper windings (02) in the form of coils installed in slots (13) of a laminated iron core (08) forming motor poles,
the long and segmented movable secondary (01) including a plurality of blades forming a train of plates, the blades are made of a conductive material, the train of plates includes a rectangular shape overlapping blades (22) without a gap between adjacent blades (22) or trapezoidal shape blades (23) having a large base fixed on the conveyor (15) and a small base pointing to an inner part of the conveyor belt (15);
wherein the canvas of the conveyor belt (15) is made of rubber, having independent fastening elements (04) for each secondary blade (22;
23) fixed to the rubber conveyor belt (15);
wherein the short primary (14) includes deflectors (06) fixed integrally with a fixing shaft (07) of faces (8a;
8b) of the iron core (8);
an entire extension of an inner portion of the faces (8a;
8b) of the short primary (14) being resin-coated with a fiberglass covering;
the iron core (08) includes on each one of its outer faces finned aluminum heat sinks (10);
wherein the short primary (14) includes a protective box (09), wherein in an upper region of the protective box (9) includes upper rollers (03);
wherein the long and segmented movable secondary (01) includes a bristle cleaner (5).

9 more elements

Dependencies are inferred from the claim text.