Damper for mounting flange

The rubber vulcanized onto the 2 flange rings is used primarily by the ZD-.. damper for attenuating the structure-borne noise* which can be reduced to approx. 3-10 dB(A) compared to direct flange mounting and its size, construction and stability and depending on the frequency. The different noise velocities - steel/air/ rubber = 5000/331/50 m/s – as well as the attenuating vibration tendency of the ZD-.. silencer enable low-cost noise attenuation.

Compared to the well-known rubber silencer, the ZD silencer still provides an acceptable setting of the often important axis spacing between motor shaft and shaft to be driven. The interrupted flange cooling surface (additional cooling surface that is often utilized for direct flange mounting) must be taken into account at the permissible motor temperature.

* The generation of noise arises initially as structure-borne noise and are only then emitted as air noise. If these air noise waves strike a component, such as a casing wall, this causes it to vibrate. The vibration of this wall (smallest bending vibrations) causes the air present in the room to be excited in turn, which develops into air noise that is perceptible to the human hearing. As each component has its own resonance frequency, countless other noise sources can be excited and hence amplified too.