This paper describes the design and characterization of a unique three-way hot gas servovalve designed for the flow control of steam at 235°C. The valve incorporates a pressure-balanced rotary spool coupled to a servomotor/gearbox/encoder combination to achieve high-bandwidth and high-precision operation, and also incorporates several design elements in order to accommodate the high temperatures associated with the working fluid. The spool and sleeve entail geometries of low aspect ratio and are mechanically isolated from the manifold with Viton O-rings to ensure uniform thermal expansion and contraction. To thermally isolate the DC motor, a PEEK motor mount is used to connect the motor housing with the valve manifold. Additionally, the motor shaft is coupled to the spool with an Oldham coupling that incorporates a PEEK center disk to further insulate the motor from the high temperature spool. The desing is presented, along with experimental data that characterizes the dynamic performance and flow characteristics of the valve.
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ASME 2004 International Mechanical Engineering Congress and Exposition
November 13–19, 2004
Anaheim, California, USA
Conference Sponsors:
- Fluid Power Systems and Technology Division
ISBN:
0-7918-4710-1
PROCEEDINGS PAPER
Design and Characterization of a Rotary Actuated Hot Gas Servovalve
Jason E. Mitchell,
Jason E. Mitchell
Vanderbilt University
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Michael Goldfarb
Michael Goldfarb
Vanderbilt University
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Kevin B. Fite
Vanderbilt University
Jason E. Mitchell
Vanderbilt University
Eric J. Barth
Vanderbilt University
Michael Goldfarb
Vanderbilt University
Paper No:
IMECE2004-59727, pp. 63-69; 7 pages
Published Online:
March 24, 2008
Citation
Fite, KB, Mitchell, JE, Barth, EJ, & Goldfarb, M. "Design and Characterization of a Rotary Actuated Hot Gas Servovalve." Proceedings of the ASME 2004 International Mechanical Engineering Congress and Exposition. Fluid Power Systems and Technology. Anaheim, California, USA. November 13–19, 2004. pp. 63-69. ASME. https://doi.org/10.1115/IMECE2004-59727
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