Precautions for the installation of each coupling

CouplingClean the parts before installation,After cleaning the parts, wipe off the washing oil on them.Ready to run in a short timeCoupling, After wiping dry, apply some turbine oil or engine oil on the surface of the parts to prevent rust.For those that need to be put into use for a long timeCoupling, Should be painted with anti-rust oil for maintenance. 

   CouplingThere are many types of structure, and the specific assembly requirements and methods are different. For the installation, the general principle is to assemble in strict accordance with the drawings. The specifics can only introduce some problems that often need to be paid attention to in the assembly of the coupling.For couplings used in high-speed rotating machinery, a dynamic balance test is generally done in the manufacturer. After the dynamic balance test is qualified, a mark of the coordinate position between the components is drawn.If you do not assemble arbitrarily according to the mark, it is likely that the vibration of the unit may occur due to the poor dynamic balance of the coupling.

   In addition, the connecting bolts on the flange of this type of coupling are load-bearing, so that the weight of the connecting bolts on each coupling can be basically the same.For example, gear couplings used on large centrifugal compressors, the weight difference between the connecting bolts used is generally less than 0.05g.Therefore, the bolts between the couplings cannot be interchanged arbitrarily. If one of the coupling bolts is to be replaced, its weight must be consistent with the weight of the original coupling bolts.

   In addition, when tightening the coupling bolts of the coupling, they should be tightened symmetrically and gradually, so that the locking force on each coupling bolt is basically the same, so that the coupling will not be skewed after assembly due to the uneven force of the bolts. Phenomenon, a torque wrench can be used if conditions permit. 

   For rigid movable couplings, after assembling, check whether the rigid movable parts of the coupling can move a little, and whether there is jamming.  

   After all couplings are assembled, they should be cranked to see if the rotation is good.In short, the correct installation of the coupling can improve the operation of the equipment, reduce the vibration of the equipment, and extend the service life of the coupling.