What is the method of aligning the coupling of the motor?

Update:22 Jun 2020
Summary:

The search for the coupling of the motor is one of the […]

The search for the coupling of the motor is one of the important tasks of the motor installation. The purpose of the alignment is to make the center lines of the two axes of the driving shaft and the driven shaft on the same straight line when the motor is working. The accuracy of the alignment is related to whether the machine is Normal operation is especially important for high-speed machines.

Absolutely accurate alignment of the two shafts is difficult to achieve, and it is more difficult to maintain accurate alignment for continuously running machines. Uneven thermal expansion of various parts, deflection of the shaft, uneven wear of bearings, and machine-generated Displacement and uneven sinking of the foundation, etc., are the reasons why it is difficult to maintain shaft alignment. Therefore, when designing the machine, there is a tolerance value for the center of the two shafts, which is also required when installing the coupling. From an angle, as long as the coupling can ensure the safe and reliable transmission of torque, the larger the allowable deviation value of the center of the two shafts, the easier it is to meet the requirements during installation. But from the perspective of installation quality, the smaller the deviation of the centerline of the two axes, the more accurate the alignment, the better the operation of the machine, and the longer the service life. Therefore, the allowable deviation of the alignment of the two shafts during the installation of the coupling cannot be regarded as the margin left by the installer for hasty construction.