Advantages of Vibration and structure-borne sound dampers:
  • smoothes the fluid flow
  • minimizes noise exposure
  • reduces disturbances of the sensor technology
  • easy to integrate in the fluid circuit

Mode of functioning
This is how vibrations are thwarted

The pulsating oil flow delivered by the pump is routed through the Hänchen vibration and structure-borne sound dampers and thus split up into multiple partial flows. These cause a counterflow to a degree and thus trigger a turbulence in the oil flow. In doing so the vibration energy is successively exhausted, i.e. the amplitudes of the vibrations are reduced to practically zero and flattened off so that vibration and structureborne sound dampers then emit a low-level pulsating oil flow. The conversion of the vibration energy takes place almost without any losses. The flow resistance lies at less than 1 bar.

Hänchen vibration and structure-borne sound dampers are maintenance free.
Hänchen vibration and structure-borne sound dampers are maintenance free.

Installation prerequisites
It’s in the arrangement

Independent of the capacities of the Hänchen vibration and structure-borne sound dampers, the installation is also vital. The outlet coupling must always be located at the highest position so that the damper bleeds itself and no air pockets occur. It must be installed close to the pump so that the pump’s pressure line can be connected directly to the damper by means of a pressure-resistant hose. The oil outlet side must also be connected by means of a hose to the remaining system. This is essential in order to prevent vibrations being transmitted from the pump’s pulsating oil flow via the hydraulics to the ”resonance body”. The minimum hose length in each case is approx. 600 mm. Tight bends in the hose should be avoided. At nominal lengths in excess of 18 mm the minimum hose length is increased to 900 mm. The Hänchen vibration and structure-borne sound dampers are supplied with silent bearings for the fastenings.
The Hänchen vibration and structure-borne sound dampers are supplied with silent bearings for the fastenings.

Technical data of Vibration and structure-borne sound dampers

Series

Q l/min
max.
p max.
bar

161
30
80
200
400
160
160
160
160
321 30
80
200
400
320
320
320
320
Note

Vibration and structure-borne sound dampers are not suited for the damping of shifting or acceleration impacts in hydraulic systems or for the damping of vibrations, which are caused by vibrating non-return valves, undamped overpressure valves etc.

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