Single surface brake - flat design

The Slim Line includes spring-pressure single-disc brakes for brake discs mounted non-positive on the shafts to be retarded. The brake disc, which is permanently connected to the shaft, can be designed as a motor fan. Owing to the single-disc brake design, SLIM LINE brakes are particularly flat. Based on the working principle, residual-free lifting is achieved. Electromagnetically-operated spring-pressure brakes build up the braking torque when the current is switched off.

Operating principle
The spring-applied single-surface brake is designed to operate dry. The force generated by an electromagnetic field is utilized to overcome the braking effect produced by the spring force. The spring-applied single-surface brake engages in unpowered condition and releases when DC voltage is applied to the field coil. The force-locked frictional connection between the fan (acting as frictional element) and machine shaft (e.g. motor shaft) ensures that the torque generated by the spring-applied brake (brake torque) is reliably transmitted to the machine (motor).

Construction
The magnetic housing of the spring-loaded single-disc brake contains the loosely mounted field winding with a one-way rectifier, whose connection wires (silicone-free) are routed out through the rear of the brake, and the pressed-in collar bushing. The pressure springs, which press the armature against the fan, are located in the coil body of the excitation winding. This generates the braking effect of the spring-loaded brake. The bolts molded onto the coil body of the excitation winding secure the armature in its position. The fan forms an interference fit with the shaft. The core component of the spring-applied single-surface brake, consisting of the magnetic housing, field winding, and collar bushing, must be mounted on the shaft such that it can move by a maximum of 0.5 mm. The compression springs, together with the thrust washer, ensure proper spacing between the fan and the core assembly of the spring-loaded single-surface brake. This achieves zero residual torque in both horizontal and vertical operation. The torque generated is supported by the anti-rotation device and the fixed pin. When a DC voltage is applied to the excitation winding of the spring-loaded single-disc brake, the force of the magnetic field compensates for the spring force, releasing the armature and thereby disengaging the braking effect of the brake. The shaft to be braked is subjected to an axial force by the spring-loaded single-disc brake.