| 摘要 |
FIELD: construction. ^ SUBSTANCE: device comprises suction nozzle, fairing installed coaxially with perforated side and blank end walls, where reservoir of torus-like shape is fixed. Reservoir is arranged with the possibility to communicate with ambient and is connected to injection pipeline. Suction nozzle is equipped with jet, inlet diametre of which exceeds nozzle diametre three times and equals diametre of fairing connected to it. Side contour of perforated wall in fairing in its vertical section is arranged in the form of parabola of the second order with axis y arranged parallel to axis of device symmetry and distanced from it at the distance equal to 2.5 d, where d is diametre of suction nozzle. Length of axis y is accepted as equal to 3 d. To send jets into central part of suction nozzle, end wall is arranged as concave. Reservoir of torus-like shape is arranged with circular slot oriented parallel to inlet diametre of nozzle and is equipped with inner jet-directing rib. ^ EFFECT: invention simplifies design and increases efficiency of cleaning of device external surface. ^ 1 dwg |
