Electrorheological fluids (ERF) can change their flow behavior and thereby the resistance in attenuation systems developed by FLUDICON. This makes it possible to perform optimal force adjustment within a few milliseconds - for attenuation, reduction of vibrations or positioning.
The electrorheological fluid RheOil is a dispersion composed of a base fluid and polarizable particles made of polyurethane. These particles have an average diameter of 5 microns and possess dipolar characteristics.
If an electric field is generated, so-called polymer chains are built within a few milliseconds (see animation). A flow channel is shown in the animation which is provided with two electrodes. If a voltage is applied, the polymer chains cause a blockage in the flow cross-section, and thus increase fluid flow resistance. This means that forces can be adjusted depending upon the intensity of the electric field over a wide range.
Electrorheological fluid (ERF) opens, in combination with intelligent control, new solution potential for valve functions, oil brakes, vibration and setting attenuators as well as actuators. In addition, this technology offers ecologically sound solutions with lower costs, leading to virtually maintenance-free systems.
source: Fraunhofer ISC Wuerzburg
RheOil is the world's only electrorheological fluid which meets industry demands. It has the following characteristics: