When selecting the coupling, the various types of factors should be considered according to the actual conditions and requirements of the users, and the types, types and specifications of the couplings that are most suitable for their needs should be selected from the existing standard couplings. Under normal circumstances, the existing standard coupling can basically meet the needs of different working conditions.
Due to the unstable driving torque of the power machine and the load bearing torque of the working machine, and the dynamic load caused by the impact caused by the manufacturing error of the transmission parts and the unbalanced centrifugal inertia force of the parts, the transmission shaft is subjected to variable load (periodic variable load and Non-periodic impact load) generates mechanical vibration, which will affect the service life and performance of the machine, destroy the normal working conditions of the instrument and the instrument, and cause additional dynamic stress on the shafting parts, when the total stress or the alternating stress are respectively Exceeding the allowable limit will cause damage or fatigue damage to the part. When designing or selecting a coupling for transmitting torque and motion, torsional vibration analysis and calculation should be carried out. The purpose is to determine the natural frequency of the shafting to determine the critical speed of each step of the power machine, so as to calculate the torsional vibration. Additional loads and stresses generated by the system and the transmission. Damping buffering measures are adopted when necessary. The basic principle is to reasonably match the quality and stiffness of the system, the magnitude and frequency of the damping force, so that the transmission does not operate within the speed range of the resonance zone, or does not appear within the operating speed range. Strong resonance phenomenon. Another effective method is to use a high-flexibility elastic coupling in the shafting system, referred to as a high-elastic coupling, to reduce the natural frequency of the shafting and to reduce the torsional vibration amplitude by using its damping characteristics. .