LOW-FREQUENCY ACOUSTIC GENERATOR Russian patent published in 2002 - IPC

FIELD: mining industry, particularly, devices for dispersion of various hard minerals such as quartz sands and accompanying minerals. SUBSTANCE: low-frequency acoustic generator has hollow body with loading and unloading units, piston vibration exciter with electromechanical drive of reciprocation motion. It is provided with sound energy concentrator whose partially enclosed confined internal space has ellipsoid internal surface with two focal planes and connected from one side with body hollow, and from the other side, with a cavity of unloading unit. Body cavity is made with axisymmetric reflecting upper surface of the second order with at least one loading hole communicated with loading unit, and lower surface smoothly passing into ellipsoid internal surface of partially enclosed confined space of sound energy concentrator. One focal plane of said sound energy concentrator is combined with focal plane of reflecting surface of the second order, and the other focal plane is combined with inlet of loading unit. Piston vibration exciter is made at least of one piston connected by means of rod with electromechanical drive. EFFECT: increased power of pulse action on treated from pressure pulse, higher degree of dispersion of inclusions contained in fluid. 11 cl, 5 dwg