Cooling fan suspension vibration filter

摘要

An information handling system cooling fan has a vibration filter that tunes out predetermined fan vibration frequencies to reduce fan vibration transfer from the cooling fan to an information handling system chassis in a targeted frequency range. For example, a leaf spring and damper are biased between the cooling fan and a fan bay support so that stiffness of the spring attenuates selected vibration frequency ranges of the cooling fan bay subsystem, such as frequency ranges where the vibrations have the greatest amplitude or frequency ranges where the vibrations tend to damage other components of the information handling system.

主权项

1. An information handling system comprising:
a chassis; a processor disposed in the chassis to process information; memory disposed in the chassis and interfaced with the processor to store the information; a cooling fan disposed in the chassis to generate a cooling air flow over the processor; a vibration filter disposed between the cooling fan and the chassis, the vibration filter reducing transfer of vibration from the cooling fan to the chassis in a tuned frequency range by biasing the cooling fan against the chassis and dampening the biasing with a damper element; and a cooling fan bay coupled to the chassis to accept one or more cooling fans, wherein the vibration filter comprises a leaf spring coupled to a bottom surface of the cooling fan bay and aligned to bias against the cooling fan upon insertion of the cooling fan into the cooling fan bay and the damper element comprising a rubber material disposed proximate the leaf spring upon installation of the cooling fan into the cooling fan bay.