PIEZOELECTRIC TRANSDUCER Russian patent published in 1999 - IPC

FIELD: geophysical borehole equipment and equipment for physical effect on seams, applicable in geological survey, petroleum, gas, mining and other branches of industry. SUBSTANCE: piezoelectric transducer uses a piezopack of longitudinally-polarized electrically parallel-connected piezoceramic washers with cover plates, λ/40 thick, where, λ - wavelength in cover plate material, reinforcing rod member and a tightening member-nut providing for longitudinal compressive forces of the piezoelectric transducer - reinforcing forces. Piezopacks are connected by a flexible insert elasticity component. Connection of the rod member and tightening member is made for adjusting the reinforcing force, elasticity component and cover plate are made of material with wave resistance and coefficient of thermal expansion of ceramics of washers, for instance, of titanium or steel. EFFECT: enhanced reliability and durability. 2 cl, 5 dwg, 1 tbl