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Fluid coupling

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

Fluid couplings are hydrodynamic devices that transmit rotation between shafts by acceleration and deceleration of hydraulic liquid. Shafts are used industrially to supply rotary movement to a wide spectral range of vehicles and devices and shaft couplings are key to providing secure rigid, flexible or non-fluid coupling china linear connection between shafts, wheels and rotary equipment.

Fluid couplings consist of a casing containing an impeller on the input or driving shaft and a runner on the output shaft. Both of these contain a fluid which is normally oil that is added to the coupling through a filling plug on the housing. The impeller, which acts as a pump, and the runner, which functions as a turbine, are both bladed rotors. The elements of liquid couplings are generally made out of metallic materials-aluminum, steel or stainless steel. Fluid couplings are used in the motor vehicle, railroad, aerospace, marine and mining sectors. They are used in the transmissions of automobiles as an alternative to mechanical clutches. Forklifts, cranes, pumps of most kinds, 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 system. Manufacturers use these couplings for connecting rotary apparatus such as drive shafts, series shafts, generators, wheels, pumps and turbines in a number of automotive, oil and gas, aerospace, water and waste materials treatment and construction sectors.

In a fluid coupling, the impeller and rotor are both bowl-shaped and have many radial vanes. They encounter one another but unlike gear couplings have no mechanical interconnection and never touch. Fluid is certainly directed by the pump into the impeller. The traveling turbine or pump is certainly rotated by an internal combustion engine or electric electric motor imparting both linear and rotational motion to the liquid. The velocity and energy can be transferred to the liquid when the impeller rotates. It really is then converted into mechanical energy in the rotor. Every fluid coupling offers differing stall speeds, which is the highest velocity that the pump can turn when the runner can be locked and maximum insight power is used. Slipping always occurs since the input and result angular velocities are identical, and therefore the coupling cannot reach complete power efficiency-some of it will always be dropped in the liquid friction and turbulence. Flexible shaft couplings such as for example fluid couplings are essential because during operation, 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 delivers a fast, convenient way to repeatedly connect and disconnect any liquid line.


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    The use of original equipment manufacturer’s (OEM) part numbers or trademarks , e.g. CASE® and John Deere® are for reference purposes only and for indicating product use and compatibility. Our company and the listed replacement parts contained herein are not sponsored, approved, or manufactured by the OEM.