The brake is composed of a yoke, an excitation coil, a spring, a brake disc, an armature, a spline sleeve, a mounting screw, and the like. The brake is mounted on the rear end of the flange (or motor) of the device; Brake disc connection.
When the excitation coil of the brake is connected to the rated voltage (DC), the electromagnetic force pulls the armature so that the armature is disengaged (released) from the brake disc. The drive shaft is normally operated or started with the brake disc. When the transmission system is separated or broken Electric brake, the brake is also powered off, then the spring pressure on the armature, forcing the brake disc and armature and flange friction between the torque, so that the drive shaft quickly stopped. In the brake cooling environment is poor, the drive shaft is a long time continuous work, if the conditions permit, you can work in the brake, keep the voltage conversion to 70% -80% of the rated voltage to reduce heat.
4 thousand Dai electromagnetic brake
Chain tail
A mechanical part that stops or decelerates moving parts in a machine. Commonly known as brakes, gates. Qian Dai electromagnetic brake mainly by the brake frame, brake parts and control devices and other components. Some electromagnetic brakes are also equipped with automatic adjustment of the gap between the brake parts. In order to reduce the braking torque and structural dimensions, electromagnetic brakes are usually mounted on the high-speed shaft of the equipment, but large equipment (such as mine hoists, elevators, etc.) with high safety requirements should be installed at low speed near the working part of the equipment On the axis.
Some electromagnetic brakes have been standardized and serialized and manufactured by a professional factory for selection.
Qian Dai electromagnetic brake is an ideal in the modern industrial automation components, in the mechanical transmission system, mainly from the transmission of power and control movement and so on. It has the advantages of compact structure, simple operation, sensitive response, long life, reliable use and easy remote control.
It is mainly related to the series of motors. Widely used in metallurgy, construction, chemical, food, machine tools, stage, elevator, ship, packaging and other machinery, and in the power (insurance) braking and other occasions.
The resistance torque that must be applied to stop or decelerate the mechanical running parts is called the braking torque. Braking torque is the basis for the design and selection of the brake, the size of which is determined by the type and work requirements of the machine. The performance of the friction material (brake) used on the brake directly affects the braking process, and the main factors affecting its performance are the working temperature and the temperature rise speed. Friction materials should have high and stable friction coefficient and good wear resistance. Friction materials are metal and nonmetallic. The former commonly used cast iron, steel, bronze and powder metallurgy friction materials, the latter are leather, rubber, wood and asbestos.
The use of electromagnetic effects to achieve the brake brake, divided into electromagnetic powder brakes and electromagnetic eddy current brakes, electromagnetic friction brakes and other forms.
① electromagnetic powder brake: excitation coil when the formation of magnetic field, magnetic powder in the magnetic field under the magnetization, the formation of magnetic powder chain, and in the fixed between the magnet and the rotor polymerization, magnetic powder by the binding force and friction to achieve braking. When the excitation current disappears, the magnetic powder is in a free and loose state, and the brake action is released. This brake is small, light weight, low excitation power, and the braking torque has nothing to do with the rotation of the rotating parts, but the magnetic powder can cause parts wear. It is easy to control, suitable for a variety of machine drive system. ② electromagnetic eddy current brake: excitation coil when the formation of magnetic field. The armature on the brake shaft rotates to cut the magnetic field lines to produce eddy currents. The eddy current in the armature interacts with the magnetic field to form the braking torque. Electromagnetic eddy current brakes durable, easy maintenance, speed range; but low efficiency at low speed, high temperature, must take thermal measures. This type of brake is often used in machines with vertical loads. ③ electromagnetic friction brake: excitation coil power generated magnetic field, through the yoke to pull the armature, armature through the coupling to achieve braking.
Also divided into dry single-chip electromagnetic brake dry multi-chip electromagnetic brake wet multi-chip electromagnetic brake and so on.
There are braking methods can be divided into power brake and power brake.
The electrical brake is a kind of connector that conveys the active side torque to the passive side, and can be free to combine, cut off or brake, because the electromagnetic force to use, called the electromagnetic clutch, brake, with a response speed Fast, simple structure and so on.
Qian Dai electromagnetic brake function:
Electromagnetic brakes are devices that allow the machine to stop and run in a short time; the brakes can also be used to reduce or adjust the speed of the machine in the short term.
