The installation of the diaphragm coupling and the damage of the drum gear coupling

　　Coupling is an intermediate part connecting the motor and the compressor. The matching accuracy of the shaft diameter of the motor and the rotor will also affect the vibration of the unit.Therefore, high requirements are put forward for the machining of compressor couplings and motor couplings. The inner hole, outer circle, and end surface of the coupling are processed by grinding, which guarantees the surface roughness while also meeting the same requirements. The requirements of shaft degree and verticality not only improve the matching accuracy of motor coupling and motor shaft diameter, compressor coupling and rotor shaft diameter, but also bring convenience for future installation and alignment.The coupling is a high-speed rotating part. During the working process, the centrifugal force generated by the eccentric amount can produce a large unbalanced moment, which will increase the vibration and increase the noise.In order to eliminate the unbalanced torque of the coupling, control the origin of vibration, and make the system transmission smooth, the dynamic balance level of the coupling is raised to level, and after the dynamic balance is over, the relative position of each coupling and each bolt The corresponding nuts and holes are marked to provide a benchmark for future installation and commissioning.
　　The diaphragm coupling can compensate the relative displacement through the elastic deformation of the diaphragm, allowing the axial, angular and radial installation errors of the connected two shafts, and has buffering and damping effects on the transmission system. It is a high-performance Flexible coupling.The structure of the diaphragm coupling is complex, and the failure of the coupling caused by the damage of the diaphragm will directly affect the normal operation of the transmission system and even cause accidents.Therefore, there is a multi-body contact finite element analysis of the diaphragm coupling.
　　For the strength analysis of diaphragm couplings, scholars at home and abroad have carried out a lot of research work.Xu Qiqing used the material mechanics method to analyze the stress of the diaphragm coupling. Based on the thin plate bending theory and the finite element method, the calculation model of the six-hole circular ring and the waist-shaped diaphragm was established, and the stress analysis was carried out; a simplified quadrant was established. One of the finite element models of the diaphragm, which calculates the stress caused by torque, centrifugal force, axial error, angular error, etc. The finite element method is used to calculate the static and dynamic stress of the diaphragm coupling, and the stress at the dangerous point of the diaphragm is calculated. The stress of the diaphragm coupling shows that the performance of the diaphragm coupling is closely related to its stress characteristics. The finite element model of a single diaphragm is established, and the equivalent stress cloud diagram of the diaphragm is calculated, and the stress of the diaphragm is pointed out. danger zone.The above-mentioned documents often only establish simplified models for a single diaphragm, and there are few reports on the related research on the finite element analysis of the overall contact of the diaphragm coupling.
　　Causes of damage to the drum gear coupling:
　　1. When using couplings, the equipment in the shafting system, such as diesel engines, gearboxes, shafting and high-elastic couplings, must complement each other in design and use, and the level of design and manufacturing is relatively high. , The quality of the ship designed in this way is also very high.
　　2. The main reason is that the vibration damper of the main engine has sunk, which makes the shafting of the coupling appear asymmetry, thereby increasing the additional torque, which makes the highly elastic coupling in use When there is a breakage accident due to fever.
　　3. Because the use range of couplings is relatively wide, they are widely used in many industries.It may be improperly used in specific situations, or it may be used without consideration, which will also cause the coupling to be damaged during use.