Freudenberg Friction Inserts is a technology aimed at increasing the power density of wind turbines. The Freudenberg Friction Inserts (FFI) technology is based on a special very thin nonwoven carrier material coated on one side with hard particles.
The FFI are customised to fit each application, in terms of both the geometry and the construction parameters of the connection. When placed in the joint, these hard particles penetrate into the surfaces of the two joining parts creating a micro interlock, thus increasing the friction coefficient and achieving higher torque transmission in connections. It enables the downsizing of components without compromising performance, reducing weight and material. Examples of applications for FFI are highly loaded flange connections between the rotor shaft and gearbox, connections between the main bearing and the machine carrier housing, the gearbox to generator, or at the pitch gear or ring gear.
