Rotating shafts are not in line with one another in most cases. Thus, FK shaft coupling bearing (ลูกปืนจับยึดปลายเพลา FK, which is the term in Thai) is typically employed to transfer torque. A flexible shaft coupling bearing does not make bad alignments acceptable. Most wish to achieve the highest operational reliability. If you do this while minimizing servicing and maintenance, you must focus on proper alignment.
Why The Emphasis On Alignment?
Alignment must focus on the relative movements of the various types of machinery due to thermal expansion, deformation brought on by pipe forces and moments, placement of foundation baseplates, etc. Think of the magnetic center of the electric motor as well in some circumstances. It is crucial if you are using machines with plain bearings. At specific points throughout the installation process, you must do the alignment.
Suppose you decide to do the alignment in cold weather. In that case, you must adjust the device to account for the heat expansion brought on by the temperature difference from the temperature at which a fan and driver work normally. After a few weeks of use, a final inspection of the operating conditions is performed whenever practical. In addition to any stress and deformation, the misalignment may result from worn bearings and loosened holding-down bolts. A change in alignment can frequently cause a rise in vibration levels.
Alignment reports are made regularly in the refineries and petrochemical sectors. The alignment is noted before withdrawing the fan or disassembling it for repairs. This recording goes into the reports before and after an operation. After warm running, the same process checks the orientation of hot gas fans.
Depending on the type of equipment used and the accuracy required, you can do proper synchronization using various methods. The manufacturer’s instructions for the fan will contain information on the alignment requirements.
If you want smooth operation and a long life expectancy, never utilize the coupling’s limiting values as specified by the coupling maker because they substantially exceed the limits for machines.
Shims made of brass or stainless steel, often positioned beneath the machine alter the alignment. Typically, baseplates are cut. This is done so that minimal shims are needed under the motor. Shifting the device diagonally on its housings enables horizontal adjustment. Horizontal jacking screws are installed on large machinery. After the final adjustment, the fan and driver are connected using tapered or parallel dowels.