Accession Number : ADP010208

Title :   MEMS Hydrodynamic Bearings: Applications and Implications to Machine-Failure Prevention

Corporate Author : TEXAS UNIV AT AUSTIN

Personal Author(s) : Wood, Kristin L. ; Nelkirk, Dean ; Busch-Vishniac, Ilene ; Weldon, William ; Chu, Chin S.

PDF Url : ADP010208

Report Date : APR 1996

Pagination or Media Count : 11

Abstract : Microdynamical systems have been studied for a number of years. Only limited work, however, has been completed on integrating microdynamical components into systems that satisfy mechanical tasks on macroscopic scales. In this paper, we describe microdynamical components that are needed to produce a surface which is actively deformable on local scales. In particular, we consider the design and demonstration of smart journal and thrust bearings capable of using embedded sensors and actuators to dynamically change the surface geometry. The ability to actively deform bearing surfaces allows for the design of bearings which are less prone to failure, the design of bearings with greater load carrying abilities, and a fundamental study of the effect of surface geometries and fluid conditions on bearing performance, such as start-up and shut-down conditions. Results of our new bearing designs are presented, focusing on numerical bearing models, sensor and actuator design and fabrication, and physical experimentation.

Descriptors :   *SYMPOSIA, DETECTORS, ELECTROMECHANICAL DEVICES, SURFACE PROPERTIES, MICROELECTRONICS, GEOMETRY, ACTUATORS, MICROMECHANICS, HYDRODYNAMICS, TURBOMACHINERY, THRUST BEARINGS.

Subject Categories : Electrical and Electronic Equipment
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE