Explosion-proof braking device with non-magnetic shaft for an explosion-proof electric motor

摘要

An explosion-proof braking device is described, which is configured to be connected to the front flange of an explosion-proof electric motor, the braking device comprising: a shaft (6) connected to the shaft of the motor from the outside, and provided with bearings (7, 8) internal to the device, an electromagnetic brake (11, 12, 13, 14) acting upon said shaft (6), comprising at least one excitation coil (11) and one air gap (10). The shaft (6) is made of a non-magnetic metal alloy, the bearings (7, 8) are so positioned as to lie outside the main flux lines of the magnetic field produced between the coil and the air gap, and the braking device is provided with flame-proof lamination joints of the through or closed type.

主权项

1. An explosion-proof braking device configured so as to be connected to the front part of an explosion-proof electric motor, the braking device comprising:
a shaft connected to the shaft of the motor from the outside, and provided with bearings internal to the device, an electromagnetic brake acting on said shaft, comprising at least an excitation coil and an air gap; wherein:
said shaft is made of a non-magnetic steel alloy that eliminates counter-electromotive braking torque on the shaft during rotation,said bearings are positioned so as to be to the outside of the main flux lines of the magnetic field produced between the coil and the air gap,said excitation coil is of the annulus type, comprising with two separate windings that are concentrically wound one over the other, thus forming coils with two couples of ends, said two windings being connectable in series or in parallel,said braking device being provided with flame-proof lamination joints of the through or closed type,wherein the electromagnetic brake further comprises:
a disk brake connected to the shaft,a movable anchor, andat least one spring,wherein when the excitation coil is not energized, the at least one spring pushes the movable anchor toward the disk brake for locking the disk brake and when the excitation coil is energized, both windings produce a magnetic field that pulls the movable anchor away from the disk brake so that the disk brake can freely rotate.