Journal
TRIBOLOGY INTERNATIONAL
Volume 119, Issue -, Pages 539-548Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2017.10.034
Keywords
Acoustic; Non-parallel; Standing waves; Squeeze film
Categories
Funding
- National Natural Science Foundation of China [51605250]
- Natural Science Foundation of Beijing Municipality [L161001]
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In order to realize contactless levitation and movement of precision components, a new kind of acoustic prototype driven by standing waves utilizing reverse hydrodynamic effects of non-parallel squeeze film was proposed in this paper. Its mechanism of movement and levitation was revealed by the viscous fluid mechanics and dynamic lubrication theory. It is amazing that the reverse hydrodynamic effects made the levitated plate move along the opposite direction of gravitational tangential component, which was proved in the experiments. The bearing and pushing capacity is predicted by numerical calculation of Reynolds equation and a CFX model. A dimensionless parameter 'voltage difference ratio' was proposed to evaluate the deflection angle of a non-parallel squeeze film, which can guide the prototype design.
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