High-pressure microhydraulic actuator
Abstract
Electrokinetic ("EK") pumps convert electric to mechanical work when an electric field exerts a body force on ions in the Debye layer of a fluid in a packed bed, which then viscously drags the fluid. Porous silica and polymer monoliths (2.5-mm O.D., and 6-mm to 10-mm length) having a narrow pore size distribution have been developed that are capable of large pressure gradients (250-500 psi/mm) when large electric fields (1000-1500 V/cm) are applied. Flowrates up to 200 .mu.L/min and delivery pressures up to 1200 psi have been demonstrated. Forces up to 5 lb-force at 0.5 mm/s (12 mW) have been demonstrated with a battery-powered DC-DC converter. Hydraulic power of 17 mW (900 psi@ 180 uL/min) has been demonstrated with wall-powered high voltage supplies. The force and stroke delivered by an actuator utilizing an EK pump are shown to exceed the output of solenoids, stepper motors, and DC motors of similar size, despite the low thermodynamic efficiency.
- Inventors:
-
- San Francisco, CA
- Fremont, CA
- Dublin, CA
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 983061
- Patent Number(s):
- 7384526
- Application Number:
- 10/848,201
- Assignee:
- Sandia Corporation (Livermore, CA)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F04 - POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS F04B - POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Mosier, Bruce P, Crocker, Robert W, and Patel, Kamlesh D. High-pressure microhydraulic actuator. United States: N. p., 2008.
Web.
Mosier, Bruce P, Crocker, Robert W, & Patel, Kamlesh D. High-pressure microhydraulic actuator. United States.
Mosier, Bruce P, Crocker, Robert W, and Patel, Kamlesh D. Tue .
"High-pressure microhydraulic actuator". United States. https://www.osti.gov/servlets/purl/983061.
@article{osti_983061,
title = {High-pressure microhydraulic actuator},
author = {Mosier, Bruce P and Crocker, Robert W and Patel, Kamlesh D},
abstractNote = {Electrokinetic ("EK") pumps convert electric to mechanical work when an electric field exerts a body force on ions in the Debye layer of a fluid in a packed bed, which then viscously drags the fluid. Porous silica and polymer monoliths (2.5-mm O.D., and 6-mm to 10-mm length) having a narrow pore size distribution have been developed that are capable of large pressure gradients (250-500 psi/mm) when large electric fields (1000-1500 V/cm) are applied. Flowrates up to 200 .mu.L/min and delivery pressures up to 1200 psi have been demonstrated. Forces up to 5 lb-force at 0.5 mm/s (12 mW) have been demonstrated with a battery-powered DC-DC converter. Hydraulic power of 17 mW (900 psi@ 180 uL/min) has been demonstrated with wall-powered high voltage supplies. The force and stroke delivered by an actuator utilizing an EK pump are shown to exceed the output of solenoids, stepper motors, and DC motors of similar size, despite the low thermodynamic efficiency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {6}
}
Works referenced in this record:
Increasing the performance of high-pressure, high-efficiency electrokinetic micropumps using zwitterionic solute additives
journal, July 2003
- Reichmuth, David S.; Chirica, Gabriela S.; Kirby, Brian J.
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High-Pressure Microhydraulic Actuator
conference, May 2008
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- ASME 2003 International Mechanical Engineering Congress and Exposition, Fluids Engineering
Conduct-as-Cast Polymer Monoliths as Separation Media for Capillary Electrochromatography
journal, March 2001
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Design of the monolithic polymers used in capillary electrochromatography columns
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