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28 Feb

Installation and Adjustment of Disc Couplings

Feb 28, 2015 Technical Articles
The centering connecting two axes of coupling is also called alignment, which makes the whole transmission system run smoothly, not cause any vibration, noise, abnormal wear and any abnormal additional loading. It is very significant to ensure the safety running of system, especially for High speed rotating shaft system. However, there is a certain amount error in the actual installation. Therefore, it is essential to carefully adjust and control the installation errors of radial and angular direction in the process of installation so as to make sure the alignment of the two axes can run smoothly and safely in the process of running.
 
Initial alignment
Measure the coupling that is not aligned by using the knife ruler and feeler gauge. Measure the end of coupling that is not paralleled by using wedge gap or feeler gauge. This method is suitable for the initial alignment or low speed and low accuracy elastic coupling.
 
Dial indicator alignment
Measure the two half couplings that are not aligned and are not paralleled by using the dial indicator or special alignment tools. Choose at least four points as a test basis points and the two half couplings are needed to be mutually detected. This method is suitable for high-speed, rigid connection and high precision rotating equipments.
 
Notes
① When using feeler gauge and knife ruler for alignment, the radial end surface of coupling should be neat, smooth, no rust and no burr.
② In order to see the light ray of knife ruler clearly, it is best to use a flashlight.
③ For the final measurements, the foundation bolt of the motor should be fully tightened.
④ When using special tool for alignment, the same symbol should be done. In order to avoid increasing measurement errors, the coupling flange should be divided into 4 to 8 points evenly in order to get the accurate data.