A fluid coupling or hydraulic coupling is a hydrodynamic or ‘hydrokinetic’ device utilized to transmit rotating mechanical power. It’s been used in automobile transmissions as an alternative to a mechanical clutch.

Fluid couplings are hydrodynamic products that transmit rotation between shafts by acceleration and deceleration of hydraulic fluid. Shafts are used industrially to provide rotary movement to a wide spectrum of vehicles and devices and shaft couplings are key to providing protected rigid, flexible or non-linear connection between shafts, wheels and rotary equipment.

Fluid couplings consist of a housing containing an impeller in the input or driving shaft and a runner about the result shaft. Both of these include a fluid which is usually oil that is put into the coupling through a filling plug on the casing. The impeller, which acts as a pump, and the runner, which acts as a turbine, are both bladed rotors. The elements of fluid couplings are generally made out of metallic materials-aluminum, steel or stainless steel. Fluid couplings are found in the motor vehicle, railroad, aerospace, marine and mining sectors. They are found in the transmissions of automobiles as an alternative to mechanical clutches. Forklifts, cranes, pumps of all types, mining machinery, diesel trains, aircrafts and rotationally-powered commercial machinery all use fluid coupling when a credit card applicatoin requires variable speed procedure and a startup without shock loading the machine. Manufacturers make use of these couplings to connect rotary apparatus such as drive shafts, range shafts, generators, wheels, pumps and turbines in a variety of automotive, coal and oil, aerospace, water and waste materials treatment and construction industries.

In a fluid coupling, the impeller and rotor are both bowl-shaped and have many radial vanes. They encounter each other but unlike equipment couplings have no mechanical interconnection and never touch. Fluid is normally directed by the pump into the impeller. The generating turbine or pump is definitely rotated by an internal combustion engine or electric motor imparting both linear and rotational motion to the fluid. The velocity and energy is normally transferred to the fluid when the impeller rotates. It really is then converted into mechanical energy in the rotor. Every liquid coupling has differing stall speeds, which is the highest rate that the pump can turn when the runner is certainly locked and maximum input power is used. Slipping always occurs since the input and output angular velocities are identical, and then the coupling cannot reach full power efficiency-some of it will always be dropped in the liquid friction and turbulence. Flexible shaft couplings such as fluid couplings are necessary because during procedure, some types of shafts tend to shift, causing misalignment. Versatile couplings provide efficient accommodation for moderate shaft misalignment that occurs when the shafts’ axes of rotation become skewed. Shaft movement is due to bumps or vibration and it results in parallel, angular or skewed shaft misalignment.
Quick release coupling (quick connect-disconnect coupling), is a mechanical device,that provides a fast, easy way to repeatedly connect and disconnect any fluid line.