Disassembly and installation method of plum blossom elastic coupling

It is difficult to dismantle various couplings if they are used for a long time. Generally, the connecting bolts should be removed first when disassembling the plum blossom elastic coupling.Because a layer of grease, corrosion products and other deposits are deposited on the surface of the thread, the bolts are not easy to disassemble, especially for the heavily corroded bolts, it is very difficult to disassemble.Removal of connecting bolts Choose suitable tools, because the bearing surface of the bolt's outer hexagon or inner hexagon has been slipped and damaged, and it will be difficult to disassemble.For bolts that have been rusted or with a lot of grease stains, solvents (such as rust loosening agents) are often used to spray the joints between the bolts and the nuts, so that the solvent can penetrate into the threads, so that it will be easy to disassemble.If the bolts cannot be removed, the heating method can be used, and the heating temperature is generally controlled below 200°C.By heating, the gap between the nut and the bolt is enlarged, and the rust is also easy to fall off, which makes it easier to disassemble the bolt.If none of the above methods work, only damage the bolts, cut or drill the bolts, and replace them with new bolts when assembling.The new bolts have the same specifications as the original bolts. The new bolts used for high-speed equipment couplings are also weighed so that the new bolts have the same weight as the connecting bolts on the same set of flanges.Due to the failure of the plum blossom coupling itself, it needs to be disassembled. First, the entire coupling must be carefully inspected (especially for the damaged coupling), and the cause of the failure should be found out.

Before disassembling the plum blossom coupling, make some marks on the coordinated positions of the various parts of the coupling for reference when reassembling.For couplings used in high-speed machines, the connecting bolts have been weighed and clearly marked and cannot be mistaken.

Cleaning, cleaning and quality evaluation of all parts of the plum blossom coupling is an important task after the coupling is disassembled.The evaluation of components refers to comparing the existing conditions of the size, shape and material properties of each component with the quality standards determined by the component design to determine which components can continue to be used and which components should be used. After use, which ones are new parts that should be scrapped.

In the process of disassembling the plum blossom coupling, the difficult task is to remove the hub from the shaft.For the hub of the coupling, a three-legged puller or a four-legged puller is generally used for disassembly.The selected puller should match the outer dimensions of the hub, and the right-angle hooks of each foot of the puller should be properly combined with the rear side of the hub, so that no slippage will occur when you apply force.This method is only used for disassembly of hubs with relatively small interference. For hubs with relatively large interference, heating methods are often used or combined with hydraulic jacks for disassembly.As long as you pay attention to the correct method of installation and disassembly of each coupling, it is beneficial to the normal use and repeated use of the coupling.