Home

Deutsch


















 

Glossary
 
Föttinger coupling
Original name for the turbo coupling, derived from the inventor Prof. Dr. Föttinger. The couplings are also frequently referred to as fluid couplings, hydraulic couplings or hydrodynamic couplings.

Zoom

Impeller
The bladed wheel of a turbo coupling connected with the driving machine is called impeller. Occasionally, the impeller is also called primary wheel.

Turbine wheel
The bladed wheel of a turbo coupling connected with the driven machine is called turbine wheel. Occasionally, the turbine wheel is also called secondary wheel.

Outer wheel
The outer wheel is the bladed wheel which, together with the shell, forms the outer cover of the turbo coupling.

Zoom

Inner wheel
The inner wheel is the bladed wheel surrounded by the outer wheel and the shell.

Zoom

Shell
Together with the outer wheel the shell forms the outer cover of turbo coupling.

Zoom

Working chamber
The fluid circuit is created in the working chamber. This is essentially the chamber between the two bladed wheels.

Zoom

Delay chamber
The delay chamber is an additional chamber filled with operating fluid from the working circuit during standstill. Consequently there is less operating fluid in the working circuit during start-up, which relieves the run-up of the motor and results in a smoother start. After the run-up of the driven machine, the operating fluid from the delay chamber is automatically drained into the working circuit.

Zoom

Annular chamber
The annular chamber is an additional inactive absorbing chamber. During motor run-up, the annular chamber is filled with operating fluid from the working circuit. This reduces the active fill rate and results in a considerable reduction of starting torque.

Zoom

Double-circuit coupling
In this case two pairs of bladed wheels are connected next to each other in a turbo coupling. As a result, nearly twice the power can be transmitted , while the diameter of the bladed wheels remains the same.

Zoom

Outer wheel drive
Impeller and shell are connected with the driving machine and are directly driven by this machine, with good heat dissipation. The optimal function of turbo couplings with delay chamber is only guaranteed with an outer wheel drive.

Inner wheel drive
The inner wheel is connected with the driving machine and is directly driven by this machine. With inner wheel drives, the heat dissipation is less favourable. The function of turbo couplings with delay chamber is not always guaranteed with an inner wheel drivel and needs to be observed in certain cases.

Axial thrust
The axial thrust is a force created in axial direction owing to the fluid circuit. Voith can pre-calculate the axial thrust. The axial thrust is more pronounced with single-circuit couplings than with double-circuit couplings.

Coupling characteristic
The coupling characteristic describes the transmission behaviour (torque transmitted) of the coupling as a function of the fill level, the input speed and the speed ratio of the impeller in relation to turbine wheel.

Retarder
Retarder is the generic name for hydrodynamic braking systems. A retarder is basically a fluid coupling in which the turbine wheel is stationary. Kinetic energy which is fed to the pump wheel is converted into heat energy. Under certain conditions, a turbo coupling can be used as a retarder (Voith Industrial Retarder VIR).

Zoom

 
Your remarks regarding this page