publication . Article . 2012

The Effects of Inlet Box Aerodynamics on the Mechanical Performance of a Variable Pitch in Motion Fan

A. G. Sheard;
Open Access English
  • Published: 01 Jan 2012 Journal: Advances in Acoustics and Vibration (issn: 1687-6261, eissn: 1687-627X, Copyright policy)
  • Publisher: Hindawi Publishing Corporation
Abstract
This paper describes research involving an in-service failure of a “variable pitch in motion” fan’s blade bearing. Variable pitch in motion fans rotate at a constant speed, with the changing blade angle varying the load. A pitch-change mechanism facilitates the change in blade angle. A blade bearing supports each blade enabling it to rotate. The author observed that as the fan aerodynamic stage loading progressively increased, so did the rate of blade-bearing wear. The reported research addressed two separate, but linked, needs. First, the ongoing need to increase fan pressure development capability required an increase in fan loading. This increase was within t...
Subjects
free text keywords: Acoustics. Sound, QC221-246, Article Subject

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publication . Article . 2012

The Effects of Inlet Box Aerodynamics on the Mechanical Performance of a Variable Pitch in Motion Fan

A. G. Sheard;