The function and alignment of the coupling

　　The function of the coupling
　　Coupling is a component that connects two shafts axially and transmits torque and movement. It has the ability to compensate for the deviation of the two shafts. In order to reduce the vibration of the mechanical transmission system and reduce the impact peak load, the coupling should also have buffering Shock absorption performance.The coupling sometimes also has an overload protection function.
　　Hoisting parts coupling finding is an important job in the process of equipment maintenance. Although the principle is simple, it is very practical.The alignment methods often used on small pumps include single-meter, double-meter and three-meter methods.No matter which method, there is a common feature that the alignment in the horizontal plane is more error-prone than the vertical plane, it is more time-consuming, and the calculation is cumbersome.
　　When selecting the type, you need to know the power and speed of the motor to determine the type of coupling. The coupling on the pump generally uses more diaphragms.When assembling, pay attention to the axial and radial directions to ensure that the coupling device is correct, and there will be no deviations that will lead to excessive torque and damage the coupling or motor.The requirement is to strictly ensure the coaxiality of the two axes, so that no unilateral load occurs during operation, so as to maintain balance and reduce vibration.
　　To make the center of the two pairs of wheels of the coupling continue, the following two conditions must be met: 1. Make the centers of the two pairs of wheels coincide, that is, make the outer circles of the two pairs of wheels coincide. 2. Make the joint surfaces (end faces) of the two pairs of wheels parallel. (The two centerlines are parallel) The purpose of finding the center is to make the centerline of one rotor shaft a continuation curve of the centerline of the other rotor shaft because the shafts of the two rotors are connected by a coupling.
　　It will cause the vibration value of the rotating equipment to exceed the standard and seriously threaten the normal operation of the rotating equipment. The center of the coupling is an important part of the inspection and repair work of the rotating equipment. If the correcting method is wrong or the result of the correcting is not correct.Especially high-speed equipment has extremely strict data requirements for coupling alignment. Now we will make a systematic discussion on the problem of coupling alignment for rotating equipment.
　　Among them, the horizontal type is more common; according to the simple level of alignment, it is divided into two types: simple alignment and system alignment. The former finds a rougher result. There are different types of coupling methods for centering. According to the device position of the rotating equipment, it is divided into horizontal There are two kinds of style and vertical style.The results obtained by the latter are more ideal, no matter how the classification principles and analysis methods are the same.