2. Operation Principle of a Hydraulic Coupling: Under the action of centrifugal force, the liquid within the cavity is accelerated from the inlet of the smaller-radius channel and thrown towards the outlet of the larger-radius channel, thereby increasing the liquid's momentum. At the pump wheel outlet, the liquid flows at a higher speed and pressure towards the turbine blades, releasing the liquid's kinetic energy to rotate the turbine and perform work, thereby converting the liquid's kinetic energy into mechanical energy.