| 摘要 |
FIELD: heating.SUBSTANCE: invention relates to the field of fan-building, namely to input devices of centrifugal fans. The input device of a centrifugal fan is a suction nozzle forming with the coating disk of the impeller an annular gap, the profile of the generant of the suction pipe has a concave shape which curvature and the length of the pipe are calculated from the condition of ensuring the minimum of the streamlined surface of the axisymmetric channel.EFFECT: due to reduction of energy losses of the air flow due to friction, vortex formation and end losses caused by the geometry of the nozzle, the device provides an increase in efficiency of the fan.2 dwg |
