Research And Development Of New Keyless Connection Membrane Coupling

Coupling is a mechanical part used for connecting two different institution shafts (active shafts and driven shafts) to corotate for transferring torque. Many problems are existed during the work process of common coupling, such as poor buffer,shock absorption performance,unable to compensate axial and angle deviation,hard to withdraw from axis. Be aimed at these problems, a new keyless connection membrane coupling is designed in this paper. Stress analysis and structural optimization by ANSYS are further conducted. Major works are as follows:First of all, be aimed at the problem of hard to withdraw from shaft, a cone keyless connection structure which is pre-tightened with bolts is designed;in order to solve the problem of poor buffer,shock absorption, unable to compensate deviation, a buffer,shock absorption structure with a metal membrane group is designed.Second, preload and relationship between preload and torque transfered by preload is analyzed, the maximum stress value and its position during torsion process is acquired. Based on the finite element analysis results, preload structure is optimized. And influence caused by different preload taper and thickness of bushing is further analyzed, a more reasonable preloaded taper and thickness are put forward.Third, stress under different work conditions of membrane is analyzed, the maximum stress caused by axial and angle deviation is researched;Maximum stress and its location of membrane during work process is analyzed, and membrane intensity is checked. The maximum axial and angle deviation under condition of maximum stress reaching its yield stress are further obtained.Finally, fatigue life of membrane under a given work condition is estimated by using the fatigue module of ANSYS, service life of membrane is calculated, influence of angle deviation on fatigue life is researched.