Failure and failure analysis of plum blossom coupling

　　(1) The products from regular manufacturers are not selected, the quality is unqualified, and the plum-shaped plastic components are crushed in the application.
　　(2) In the processing of half couplings, the accuracy of the machine tool is not high or the burrs at the protruding teeth are not cleaned. When the plum-shaped coupling is installed, the plum-shaped plastic element in the middle is scratched, which affects its life.
　　(3) During the installation process, there is no correct installation method, and the two half couplings are not installed in the center, which causes the plum-shaped plastic component to be crushed during use.
　　Aiming at the impact of the misalignment of the two half couplings on the quincunx-shaped components, using Ansys software to simulate and analyze, set the coupling speed to 2r/min, and obtain the quincunx-shaped components in the centering, offset 1500mm, Three cases of offset 0.5mm.When the centering of the two half couplings is intact, the strain value of the quincunx-shaped element is very uniform; when the neutrality of the two half couplings is offset by 1mm, the local strain value of the quincunx 2 times; when the neutral offset of the two half couplings is 2mm, the local strain value of the quincunx-shaped element is about 0.5 times that of the centering.
　　When the neutral offset of the two half couplings is 2mm, the local strain value of the quincunx-shaped element is about 0.5 times that of the centering; when the neutral offset of the two half-couplings is 3mm, the local strain of the quincunx The strain value is about 2 times that of centering.It can be concluded that when two half-couplings are installed and the offset of the centering is greater than the allowable offset of the product, the strain value and the displacement value of the quincunx component are increased by different times.
　　For the first fault, choose a regular manufacturer's product to solve; for the second fault, the machining accuracy of the two halves of the coupling should be controlled. After the processing is completed, some processed barbs should be cleaned and polished in time; for the third In the event of a failure, we should fully understand the importance of the coupling during installation, understand and master the installation skills of the plum-shaped coupling, so as to avoid many losses.