Introduction to the electromagnetic brake
The electromagnetic brake is an ideal automatic actuator in modern industry. It is mainly used to transmit power and control motion in the mechanical transmission system. The utility model has the advantages of compact structure, simple operation, sensitive response, long service life, reliable use, easy realization of remote control, etc..
The electromagnet is the key part of the electromagnetic brake, which has a great influence on the stability and reliability of the electromagnetic brake. The temperature of the working parts of the brake will rise sharply when the brake is used continuously or when the brake is applied in high-speed running.
When the temperature is high to a certain degree, the friction coefficient of the friction pair and the braking efficiency of the electromagnetic brake decrease due to the action of mechanical, physical, and chemical factors, this phenomenon is called thermal degradation of brake performance, and the thermal degradation resistance of electromagnetic brake is one of the important indexes to evaluate the performance of the brake.
The friction ring rotates with the brake drum, and the electromagnet is connected with the drive lever through a clamp spring. At the beginning of braking, the controller sends out a braking signal, the electromagnet is electrified, the electromagnetic attraction is produced, and the electromagnet is adsorbed on the friction ring.
Because the electromagnet is constrained by the driving lever, it slides relative to the friction ring, and the friction force on the electromagnet drives the driving lever to rotate around the fulcrum.
The driven end of the lever opens the two friction shoes of the brake and presses them against the brake drum, producing a braking moment.
At the end of braking, electromagnet power off, suction and friction disappear, in the return spring pull, friction shoes off the brake drum, release the brake.
Electromagnetic brake is mainly used with series motors. Widely used in metallurgy, construction, chemical, food, machine tools, stage, elevators, ships, packaging, and other machinery, and in power failure (insurance) braking and other occasions.