Fluid coupling

A fluid coupling or hydraulic coupling is a hydrodynamic or ‘hydrokinetic’ device used to transmit rotating mechanical power. It has been used in automobile transmissions instead of a mechanical clutch.

Fluid couplings are hydrodynamic products that transmit rotation between shafts by acceleration and deceleration of hydraulic fluid. Shafts are utilized industrially to supply rotary motion to a wide spectrum of vehicles and equipment and shaft couplings are fundamental to providing protected rigid, flexible or nonlinear connection between shafts, tires and rotary equipment.

Fluid couplings contain a housing containing an impeller about the input or traveling shaft and a runner about the result shaft. Both these include a fluid which is usually oil that is put into the coupling through a filling plug on the casing. The impeller, which works as a pump, and the runner, which acts as a turbine, are both bladed rotors. The components of liquid couplings are generally crafted from metallic materials-aluminum, steel or stainless steel. Fluid couplings are used in the automotive, railroad, aerospace, marine and mining sectors. They are used in the transmissions of automobiles as an alternative to mechanical clutches. Forklifts, cranes, pumps of all kinds, mining machinery, diesel trains, aircrafts and rotationally-powered commercial machinery all use liquid coupling when an application requires variable speed operation and a startup without shock loading the machine. Manufacturers use these couplings to connect rotary tools such as drive shafts, line shafts, generators, wheels, pumps and turbines in a variety of automotive, oil and gas, aerospace, water and waste treatment and construction sectors.

In a fluid coupling, the impeller and rotor are both bowl-shaped and have many radial vanes. They face each other but unlike equipment couplings have no mechanical interconnection rather than touch. Fluid can be directed by the pump in to the impeller. The generating turbine or pump is normally rotated by an internal combustion engine or electric engine imparting both linear and rotational movement to the liquid. The velocity and energy is transferred to the fluid when the impeller rotates. It is then changed into mechanical energy in the rotor. Every liquid coupling offers differing stall speeds, which may be the highest speed that the pump can turn when the runner is locked and maximum insight power is used. Slipping always occurs since the input and result angular velocities are similar, and therefore the coupling cannot reach full power efficiency-some of it will always be dropped in the fluid friction and turbulence. Flexible shaft couplings such as fluid couplings are essential 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 outcomes in parallel, angular or skewed shaft misalignment.
Quick release coupling (quick connect-disconnect coupling), is definitely a mechanical device,that delivers a fast, practical way to repeatedly connect and disconnect any liquid line.