Fluid Drives and Fluid Couplings
Fluid drives and fluid couplings are hydrodynamic devices that transmits rotational power. There are 4 main components of a fluid coupling: The housing, the input element (including the impeller), the output element (including the runner) and the oil. The housing contains the oil and the rotating mechanical components. The input element connects to the driving equipment like a motor or a turbine. Inside the coupling or fluid drive is an impeller. The impeller drives. The output element connects to the driven equipment such as a pump or fan. Inside the coupling is a runner. Between the input and output elements is oil. Kinetic energy is added to the oil when input element rotates. This energy is smoothly transferred to the output element and the driven equipment.