Compensation performance and selection requirements of elastic coupling

The elastic coupling has the performance of compensating the relative deviation of the two shafts, cushioning, shock absorption, and suitable for general occasions. The elastic coupling is made of polyurethane plastic as the elastic element, and the working temperature is -35~+80 degrees.The polyurethane elastomer is limited by the convex claw block, which can avoid internal deformation caused by impact and external deformation caused by centrifugal force; the large concave surface of the convex claw makes the surface pressure on the involute tooth very small, even if the tooth is overloaded , The teeth will not wear or deform.Shock and vibration, ambient temperature and humidity range, the presence of oils, solvents, corrosive liquids, steam, sand, dust, salt water and radiation.

Compared with other couplings, the elastic coupling works stably, with good vibration damping, buffering and electrical insulation properties; simple structure, small radial size, light weight, small moment of inertia, suitable for medium occasions; elastic coupling It has large axial, radial and angular compensation capabilities; polyurethane elastic elements are not afraid of oil, have large carrying capacity, and have a good service life; elastic couplings do not require lubrication, require less maintenance, and can run continuously for a long time.

The elastic coupling is fixed by positioning screws. The gap between the two positioning screws is 90° to lock the shaft of the fixed coupling. The old-fashioned fixing method may cause damage or damage to the shaft due to the contact between the front end of the screw and the shaft. Difficult to disassemble.The clamping screw fixation uses the tightening force of the hexagon socket bolt to shrink the slit and clamp the shaft tightly.

This method is convenient to fix and disassemble, and will not cause damage to the shaft, so it is a very common fixing method.The keyway type fixation is suitable for high-torque transmission. To prevent axial sliding, it is usually used together with set screw fixation and clamping screw fixation.

The coupling is used to connect the prime mover shaft and the driven machine shaft of the electromechanical equipment. The drive equipment operates normally and has the corresponding ability to compensate for the deviation of the two shafts. The customized coupling has the function of overload protection, but the centrifugal coupling and airbag The clutch does not have the ability and conditions to absorb shock loads (it turns out that the centrifugal coupling has caused equipment damage), so the hydraulic coupling is selected as the new coupling device of the FP5012 crusher. In addition, the coupling also has buffering and vibration reduction performance. , Can reduce the vibration of the mechanical transmission system, and reduce the high impact peak load.

Our correct selection of couplings for electromechanical equipment is of great significance for improving the stability of coal mine electromechanical equipment, equipment availability, reducing the probability of forced shutdown of the equipment, reducing maintenance costs, and extending the service life of the equipment.The working principle of the coupling is that 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.

The selection of the coupling is changed to be based on the working performance of the equipment. To improve the operating conditions of the equipment, it is necessary to change the connection device of the electromechanical equipment.In order to increase the cushioning and vibration absorption effects of the coupling, the cavity between the reeds of each group is filled with lubricating oil. Under the action of variable load, the reeds bend left and right to form a pressure change in the oil cavity, forcing the lubricating oil to pass through the reeds. The gaps on both sides flow from one side to the other, generating large viscous frictional resistance.Coupling is an important component of electromechanical equipment, improper selection will affect the operating conditions of the equipment, and even cause equipment failure.