Fluid Coupling

Fluid couplings are devices used in mechanical power transmission systems to transmit torque and change the speed of rotating machinery. They belong to the supply class of torque converters and speed changers in the supply group of mechanical power transmission equipment.

A fluid coupling consists of three main components: a housing, an impeller, and a turbine. The housing contains the fluid and connects the input and output shafts. The impeller is connected to the input shaft and is responsible for driving the fluid inside the coupling. The turbine is connected to the output shaft and is driven by the fluid flow from the impeller.

The fluid coupling works based on the principle of hydrodynamic power transmission. When the input shaft rotates, it drives the impeller, which in turn creates a flow of fluid inside the coupling. This fluid flow causes the turbine to rotate, transmitting torque to the output shaft.

One of the key advantages of fluid couplings is their ability to provide smooth and gradual torque transmission. This helps in reducing shock loads and protecting the connected machinery from damage. Fluid couplings also provide a certain degree of overload protection by allowing the input and output shafts to slip relative to each other when the torque exceeds a certain limit.

Fluid couplings are commonly used in various applications, such as conveyors, crushers, pumps, and fans, where smooth torque transmission and speed control are required. They are particularly useful in situations where the load may vary or where there is a need for starting and stopping the machinery frequently.

In summary, fluid couplings are important components of mechanical power transmission systems. They belong to the supply class of torque converters and speed changers in the supply group of mechanical power transmission equipment. These devices provide smooth torque transmission, speed control, and overload protection in various industrial applications.