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A piezoactuated diaphragm micro compressor with a hydraulic drive.

Number: pap. 1300

Author(s) : HU Y., WANG W.

Summary

Both volumetric efficiency and actuation force are keys to improve the performance in diaphgram-type piezoactuated micro compressor. In this paper, a hydraulic drive was introduced to the micro compressor for the sake of improving its volumetric efficiency and actuation force, where the hydraulic oil was driven by the piezoactuator and transferred the actuation force to a flexible diaphragm, which compressed the fluid in a domed cavity. Two analytical solutions were derived to predict the performance (pressure rise and stroke volume) of the micro compressor. One was the non-linear deflections of a diaphgram-type piezoactuator under loads of voltage and pressure, which considered the geometrically nonlinearity as well as the electrostrictive and electroelastic effect of the piezodisc. The other one was large deflections of a flexible diaphragm under a uniform pressure load, which was derived based on the force equilibrium equations of the flexible diaphragm. The deformation of the piezoactuator and the flexible were validated via experimental measurements, which denoted that the two solutions are accurate. The relation between pressure rise and stroke volume was investigated for the micro compressor with a specific cavity volume. The results showed that the maximum pressure rise ratio was 1.46 at the driving voltage of 100 V with 101.3 kPa of suction gas pressure.

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Pages: 9

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Details

  • Original title: A piezoactuated diaphragm micro compressor with a hydraulic drive.
  • Record ID : 30024280
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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