The working principle and application effect of the coupling
The working principle of the coupling: the rotation of the prime mover drives the swing arm to rotate, and it is thrown out under the action of centrifugal force. As the motor speed increases, the positive pressure of the three centrifugal friction blocks installed on the swing arm on the friction wheel is also Increase, the friction torque gradually increases and drives the load to run. Under severe overload or locked-rotor conditions, the torque at the load end is greater than the friction torque, and the centripetal force received by the centrifugal friction block decreases, resulting in a decrease in the force of the slider, and the coupling plays a role in overload protection. When the equipment load suddenly increases or decreases, the friction block and the friction wheel produce intermittent relative movement, thereby forming an alternating impact load, which repeatedly impacts the coupling surface of the coupling output sleeve and the input shaft of the reducer , Like a heavy hammer hitting the joint surface countless times, thereby damaging the joint surface and the key pin. To effectively improve the operating conditions of the equipment, it is necessary to change the connection device of the electromechanical equipment.

Coupling is an important component of electromechanical equipment, improper selection will affect the operating conditions of the equipment, and even cause equipment failure. The selection of the coupling must be based on the working performance of the equipment (power, speed, impact, vibration, load change, drag system requirements), working environment (ambient temperature, environmental humidity) and many other factors, based on science, reason, and application. , The principle of economy, choose the coupling suitable for the site, so as to lay a good foundation for the efficient and safe operation of the equipment. The coupling will not suffer damage to the keyway and flat key of the output shaft sleeve. The equipment runs without noise, vibration, and impact. Various operating indicators are normal, and the equipment failure rate is significantly reduced. And the maximum torque value of the coupling is lower than the overturning torque of the motor to protect the motor from overload. If overload or even "stuck" occurs, it can unload by itself to protect the motor and transmission mechanism.