Reminder-the importance of using magnetic powder clutches
Magnetic powder clutch is based on electromagnetic principle and uses magnetic powder to transmit torque. The transmitted torque and the exciting current basically have a linear relationship. Because its output torque is proportional to the exciting current, it has precise control characteristics and constant torque output, which plays a key role in the tension control of various mechanical equipment.
Magnetic powder clutch is a component used in many equipment to adjust the operating status of the equipment. It is widely used in a series of precision mechanical instruments such as printing machines and packaging machines.
The working characteristics of magnetic powder clutches determine its application range. It uses the exciting current as the control means. Because its output torque is proportional to the exciting current, it has precise control characteristics and constant torque output. It plays a key role in the tension control of various mechanical equipment.
The magnetic powder clutch is matched with a torque speed sensor and a speed power measuring instrument to form a torque speed power test system, which is used for static and dynamic detection of some power machinery, transmission machinery input, power and speed. It can also be used for overload protection, buffer start, speed regulation, etc. It is a multi-purpose device.
The magnetic powder clutch can be used for flexible starting. In the rewinding and unwinding equipment, a magnetic powder brake is generally installed on the unwinding end. In order to prevent the inertial unwinding speed from being too fast, the magnetic powder clutch of the rewinding end device is used for rewinding. The magnetic powder clutch is applied to the printing machine to receive the material. Due to the speed difference between the motor speed and the barrel, the speed difference will generate a certain amount of heat. Care must be taken to control the temperature to within the allowable value.
The use of magnetic powder clutch (magnetic powder brake) must be matched with magnetic powder. Magnetic powder is filled in the working cavity of magnetic powder clutch (magnetic powder brake) and plays a key role in work. Magnetic powder is a medium that transmits torque and is an important material in magnetic powder clutches. The requirements are as follows:
1. It has high magnetic permeability and low coercive force to achieve large transmission torque and small residual torque after current interruption.
2. Good heat resistance, no obvious oxidation at high temperature (300-500 ℃), no sintering, no agglomeration, corrosion resistance, can keep the clutch performance stable for a long time.
3, good fluidity, to ensure that the clutch is quickly disengaged after the coil is powered off.
For clutches that work under speed differences, magnetic powder with good high temperature and friction resistance should be selected. For clutches that work in automatic adjustment systems, first consider magnetic powders with high stability.