Nested flextensional transducer and cylindrical actuator modules

A multistage flextensional transducer comprises at least one inner elongate driver member (202) within and mechanically coupled to an inner shell (203) that is nested within an outer shell (208); the inner shell comprising a pair of contact portions (204) abutting the driver member and a pair of tra...

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Bibliographische Detailangaben
Hauptverfasser:	FIONA LOUISE LOWRIE, AHMED YEHIA AMIN ABDEL RAHMAN, JONATHAN GEOFFREY GORE, RICHARD CARSON MCBRIDE
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRICITY FIXED CONSTRUCTIONS HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOTOTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISEPROVIDED FOR MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER SPRING, WEIGHT, INERTIA OR LIKE MOTORS WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	A multistage flextensional transducer comprises at least one inner elongate driver member (202) within and mechanically coupled to an inner shell (203) that is nested within an outer shell (208); the inner shell comprising a pair of contact portions (204) abutting the driver member and a pair of transmission portions (211) on opposite sides of the inner shell between the contact portions; the outer shell being arranged so that the transmission portions act as bridging driver members between the said inner and outer shells. Flexure of the outer shell being driven, on actuation of the transducer, by movement of the bridging driver members results in amplified motion of transmission members (61). The transducer may act as a push or pull actuator or sensor, may magnify displacement and may employ smart materials as driver members. Also cylindrical modules containing thin flextensional actuators may provide axial displacement in a downhole environment and may move a device axially along a down-hole pipe or close a valve opening or inch along the pipe.