Experiment for Attaching Force of a Suction Fan on Various Concrete Wall Surfaces

Abstract:

In order to measure attaching performance of the suction fan against a concrete wall, test apparatus measuring suction force of the fan was developed. Using this test apparatus, four types of concrete wall specimens were tested to measure the attaching force. The test apparatus consisted of a fan motor, a pneumatic cylinder, a load cell, and sensors for vacuum pressure and a rotating speed of the fan. Vertical wall surface of concrete material were manufactured to four different shapes that is flat, step, rib and embossing type. When the fan is rotating in the fan-housing which is fixed by metal frame, the wall specimen is moved near to fan-housing edge by the pneumatic cylinder. And the specimen may be attached to fan-housing edge by suction force of the fan, and the wall specimen is reversely moved away from the fan-housing edge by the pneumatic cylinder. Then suction force of the fan was measured using a load cell. And the suction force was measured depending on specimen types and varying the rotation speed of the fan. Test result shows that the fan speed is proportional to the suction force, and interestingly, suction force is almost independent from the specimen shapes. The maximum suction force was equally measured with 231.9 N on the step and embossing type surface with 1,800 rpm.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 853-858
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.853
• Online since: May 2012
• Authors: Byung Ju Lim, Young Bog Ham, Chang Dae Park
• Keywords: High-Rise Building, Outer Wall, Suction Fan, Suction Force, Wall Surface

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