Structural Optimization and Experimental Study of High-Speed Diaphragm Couplings

The issue of power transmission between high-speed rotating machinery is critical to their stable operation. A high-speed membrane-type coupling is a flexible coupling that transmits torque using a set or several sets of extremely thin stainless steel plates as flexible elements. Due to its ease of use and strong compensation capabilities, it has found widespread application. Currently, most rotating machinery power transmission systems utilize membrane couplings.

In high-speed rotating devices, the intermediate section of the coupling rotates at high speeds under flexible connection, making the coupling's vibration the primary vibration source of the entire rotor system. Therefore, dynamic analysis and strength analysis of the coupling are particularly important. The primary causes of coupling vibration are twofold: dynamic imbalance and misalignment during coupling assembly, which coexist and interact simultaneously. The critical component of the coupling, the metal membrane, bears the dual responsibility of transmitting torque and absorbing misalignment. The membrane often fractures due to fatigue caused by alternating stresses.