Instruction Manual for Magnetic Powder Clutch and Brake

　　 Magnetic powder brake It has an exciting coil, a soft magnetic material, and a magnetic circuit composed of coils around the air gap. It is mainly composed of three parts: an active rotor, a passive rotor, and a fixed support. Some soft magnetic magnetic powder is filled between the active rotor and the passive rotor.

　　1. When the coil is not energized and the cylinder rotates, the magnetic powder is pressed against the inner wall of the cylinder due to centrifugal force, a gap is generated between the magnetic powder and the rotor, the clutch does not generate idling torque, and therefore almost no heat is generated.

　　2. When the coil is energized, the current establishes a magnetic field in the magnetic circuit. The magnetic powder between the active and passive components is connected into a chain shape. At this time, the torque can be transmitted due to the friction between the various components. The larger the excitation current, the greater the magnetic induction intensity in the working gap, the greater the electromagnetic suction force, and the greater the transmitted torque; conversely, the transmitted torque becomes smaller. By adjusting the size of the excitation current, the size of the transmitted torque can be adjusted.

　　3. When the excitation current is disconnected, the magnetic powder quickly returns to the unexcited state and is released from the control of the brake. The key to the quality of the magnetic powder brake is the quality of the magnetic powder. The higher the magnetic permeability of the magnetic powder and the less residual magnetism, Magnetic powder brake the better the control characteristics.

　　4. Because Magnetic powder brake the active part is rotating at high speed, a large amount of heat will be generated, so the magnetic powder needs good heat resistance and wear resistance.

Precautions:

1. Please use the magnetic powder brake with the correct installation method (using the high-speed rotating side as the input side). If the mechanical structure requires the input and output shafts to be installed in reverse, please use it at 1000R/MIN or less. Reversing the input and output shafts will cause the machine to idle for a long time, stirring the magnetic powder, which will greatly shorten the service life of the magnetic powder brake.

2. Please pay attention to moisture. If the magnetic powder is damp, the performance will become unstable, so be extra careful not to allow oil or water to enter the inside. Especially when installed in a gearbox, oil will penetrate the shaft and enter the inside, so it must be completely sealed with a film.

3. Please pay attention to the surface temperature. The maximum surface temperature caused by continuous operation is below 90 degrees during operation. If this value is exceeded, the durability will be greatly reduced. Please be sure to use the above-mentioned limit temperature as the standard, and keep it within the allowable sliding work rate during use.

The magnetic powder brake is composed of a drive unit (input shaft) and a driven unit (output shaft). The space between the two units is filled with granular magnetic powder (approximately 40 microns in volume). When the magnetic coil is not energized, the torque is not transmitted from the drive shaft to the driven shaft, but if the coil is energized, the magnetic powder is attracted due to the magnetic force, resulting in a hardening phenomenon, and the torque is transmitted during continuous sliding. Principle of magnetic powder brake Similar to a magnetic powder brake, except that the drive unit is replaced with a fixed unit.

Maintenance and inspection of magnetic powder clutch and brake