| 摘要 |
A pneumatic cleaner, particularly for turbines and like elements of textile machines which comprises a suction head, a suction duct communicating at one end with a conical suction mouth defined in the head and on the other end with a collecting container. The suction head has a front surface provided with a step-like annular projection so as to match with the entrance of a turbine or like element of a textile machine and to engage with the turbine entrance geometrically. The cleaner is also provided with a compressed air duct ending with a nozzle inside the suction duct, the nozzle being oriented so as to form a depression and suction in the suction mouth. The head further comprises a first and a second passage each communicating at one end with a source of compressed air and each having at the other end an air blast nozzle ending at the conical mouth of the suction head. The air blast nozzle of the first passage is directed with its axis crossing the axis of the conical mouth at a point outside thereof and the air blast nozzle of the second passage is inclined with respect to the front surface of the head and has an axis skew with respect to the axis of the conical mouth. Combined action of the air blast nozzles creates air movement with a vortical component in the object to be cleaned, thereby causing dust material and the like to be dislodged to the center where suction through said suction mouth is greatest.
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