Title :
PZT piston driven hydraulic pump development
Author :
Oates, William S. ; Mauck, Lisa D. ; Lynch, Christopher S.
Author_Institution :
George W. Woodruff Sch. of Mech. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Piezoelectric materials operated at high frequency and large electric field can produce very high power densities. The difficulty with utilizing this power density in motor applications is the very small stroke produced by piezoelectrics. Stroke rectification is implemented to obtain a high power density device. This has been accomplished using a piston driven hydraulic pump. Rectification of fluid power is obtained using check valves. Details of the design and characterization of the resulting pump are presented. The thermodynamic cycle of a piezoelectric stack actuator in a piezo-pump application is also illustrated
Keywords :
electrohydraulic control equipment; lead compounds; piezoelectric actuators; pumps; rectification; PZT; PZT piston; PbZrO3TiO3; check valve; fluid power density; hydraulic pump; motor applications; piezoelectric stack actuator; piezohydraulic pump; stroke rectification; thermodynamic cycle; Fluid flow; Hydraulic actuators; Impedance matching; Piezoelectric actuators; Piezoelectric materials; Pistons; Pumps; Springs; Thermodynamics; Valves;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.942424