Tackling vibration, shock, and noise through wire rope mounts

When the machines or equipment are operated they generate vibrations which get transmitted to the receiving structure which may be a floor, frame or a support. The vibrations result in unwanted effects in two domains. The first is the structure borne sound, due to the vibrations in the audible frequency range. The other is resulting from low frequency vibrations which lead to structural fatigue and failure. In order to reduce the vibration transmission the source has to be decoupled from the receiving structure. This is best achieved by the use of wire rope isolators.

Vibration, shock and noise

The use of wire rope mounts is traditionally done for providing insulation from low frequency vibrations. The wire isolators are also frequently used for shock isolation applications. However, of late there is a lot of interest in the use of wire rope vibration isolators for noise abatement, which is effective isolation within the audible frequency domain. Here the stiffness of the wire rope comes into play. Contrary to popular belief which favors metal springs, the cable isolators are also suitable for noise and vibration applications within the audible frequency zone.

Damping and amplitude

The wire rope isolators for vibration damping provide rather high damping just like rubber isolators. The reason for this behavior is due to the friction motion between the separate threads of the twisted wire rope. The stiffness is strongly dependent on the frequency but Tackling vibration, shock, and noise through wire rope mountsis independent with respect to the vibration amplitudes, within the audible frequency range. The wire rope vibration isolators depict a low stiffness for significantly high amplitudes in low frequency applications. Thus the behavioral patterns of the wire rope isolators are suited for vibration and shock isolation as well as for noise reduction in the audible frequency domain.

Impact load and shocks

The Andre HVAC wire rope mounts have a superior resilience. The systems have the ability and strength to restrain load under unfavorable conditions. They rapidly return to the normal operating position after repeated shocks. The wire rope isolators diminish the shock with minimum dynamic travel. Large deflections are required to bring the impacts of heavy shock loads within acceptable limits. The Andre HVAC wire isolators are having a sturdy design which does buckle under shock loads but does not deform permanently or bottom out.

Space limitations

The versatility of the wire rope vibration isolators can be gauged from the fact that it provides three-plane and all axis isolation. It can also be installed vertically, horizontally or laterally. The design strengths are responsible for the wire rope mounts to be installed in very compact areas. The compact wire rope isolators are specialized product offerings keeping the limited space requirements in mind.

Wire rope properties

The steel wire rope which is used in the threaded coil form in the wire rope mounts is strong, flexible and fatigue resistant. This property emanates from the wire construction which contains multiple strands of high tensile drawn wire. When the coil is bent or buckled under the load it has the elastic element properties just like a spring or rubber mount.

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