The working principle and application effect of the coupling

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, shock, vibration, load) Change, drag system requirements), working environment (ambient temperature, environmental humidity) and many other factors, based on the principles of science, reason, application, and economy, choose the coupling that is applicable to the site, so as to lay a good job for the equipment * and * Basic. The coupling will not have output shaft sleeve keyway and flat key damage, the equipment runs without noise, vibration, and impact, all operating indicators are normal, and the equipment failure rate is significantly reduced. And the maximum torque of the coupling The value is lower than the subversion torque of the motor to protect the motor from overload. If an overload or even "stuck" occurs, it can unload by itself to protect the motor and transmission mechanism.
    The coupling is used to connect the prime mover shaft and the driven shaft of the electromechanical equipment. The drive equipment operates normally and has a certain ability to compensate for the deviation of the two shafts; the characteristics of the coupling can be seen: airbag clutch, hydraulic coupling, centrifugal type Couplings have overload protection, but centrifugal couplings and airbag clutches do not have the ability and conditions to absorb impact loads (it turns out that centrifugal couplings have caused equipment damage), so hydraulic couplings are used as The new coupling device of the FP5012 crusher. In addition, the coupling also has buffering and damping performance, which can reduce the vibration of the mechanical transmission system and reduce the impact peak load. Reasonable selection of the coupling of the electromechanical equipment can improve the reliability of the coal mine electromechanical equipment. , Equipment availability, reducing the probability of forced shutdown of equipment, reducing maintenance costs, and extending the service life of equipment are of great significance.
    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 load end torque is greater than the friction torque, and the centripetal force received by the centrifugal friction block decreases, resulting in a decrease in the force on the slider, and the coupling Plays the role of 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, repeatedly impacting the output end of the coupling and decelerating The input shaft of the machine is matched with the joint surface, just 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.