TUMBLING DEVICE Russian patent published in 2001 - IPC

FIELD: mechanical engineering, instrumentation engineering, finishing-and-skinning and strengthening treatment of workpieces in freely granulated medium. SUBSTANCE: device contains multisection drum connected with loading and unloading devices. The drum is presented by sections which are made of broken spiral-shape tunnel with polygonal cross-section. Each section consists of two sub- section interconnected by equal sides. The first sub-section is made of large equilateral trapezium and two large scalene triangles. The bases of the triangles are equal and coincides to the sides of the trapezium. The lateral sides of the triangles are equal to the upper base of the trapezium. Second sub-section is made of small equilateral trapezium connecting with its lateral sides to small lateral sides of small triangles. The bases of the small triangles are connected to the first sub-section. The lateral sides of the triangles are equal to the bottom base of the small trapezium and bottom base of the large trapezium forming in such way large outlet opening of the section. The upper base of the small trapezium of the second sub-section is equal to the upper base of the large trapezium and to the lateral sides of the large triangles of the first sub-section forming in such way small inlet opening of the section. Each section is twice as large as previous. EFFECT: enhanced efficiency of treatment, usage of drums with sections of various configuration, sizes and spaces enhances intensity of mixing the medium and workpieces due to breaking down stationary of movement of the workpieces flows. 11 dwg