Testing the electrostatic characteristics of polypropylene fabric with metallic yarns, intended for use in coal mines threatened by the explosion hazard. Part 1: Laboratory tests

Acquiring electric energy from the transport conveyor roller movement for distributed sensors network

“…Several technical solutions have been created for electricity generators, which use belt conveyor movement to convert mechanical energy into electricity, however, in each of the known solutions the possibility of using this energy is only possible during the conveyor operation. In 4) -the bearing housing, (5) -labyrinth seal (5), rings (6) -snap (7) -sealing, (8) -closing, [33] known design solutions, the use of the generator requires a change in the form of the conveyor belt, which in the case of an existing conveyor requires a new approval. In addition, in the case of the main belt conveyor, located in underground workings, the assembly [37] of additional generator holders on the conveyor's trestles can be complicated and time-consuming, and thus expensive, due to the stopped production process in the mine.…”

“…1. The roller design: (1) -the shell, (2) -the axis, (3) -the hub, (4) -the bearing housing, (5) -labyrinth seal (5), rings (6) -snap (7) -sealing, (8) -closing,[33]…”

“…Fig.2. Layout of the roller with a built-in generator: (1) -shell, (2) -drive shaft, (3) -the hub, (4) -bearings, and (5) -labyrinth seal, (6) -snap rings, (7) -sealing rings (8) -closing rings, (9) -generator, (10) -jam nuts, (11) -split spacer rings, (12) -cable, (13) -cable gland,[33] …”