PNEUMATIC VIBRATION EXCITER Russian patent published in 1996 - IPC

FIELD: vibration machines for production of building materials. SUBSTANCE: vibration of movable mass installed in body is excited by periodic supply of compressed air in one of body chambers and its discharge from the other chamber at the end of direct motion of mass. Body chambers are separated with movable mass and diaphragm secured to the mass and body and intercommunicated by through channel made in movable mass. Installed on movable mass is valve with two shutoff members for closing the through channel and simultaneous opening of discharge hole made in body wall limiting the second chamber. Connection of valve with mass allows their mutual axial displacement. At the end of straight stroke the valve thrusts the body wall. Valve and seat for its first shutoff member are located at the outlet of through channel. Located in through channel is rod connected with its one end to body on the side of the first chamber. The other end of rod, through flexible member, is connected to movable mass. Threaded joint of the first end of rod with body allows regulation of the rod position and changing, owing to this, the relation between the forces in the direct and reverse motions of movable mass. Vibration exciter has simple and technological design. EFFECT: higher efficiency. 2 cl, 1 dwg