Open-End Spinning Frames Driven by Air-Jet

Abstract

Various devices driven and supported by air jet were tested for a high speed open-end spinning frame. Two types of rotors were prepared: the upper fluting rotor and the under fluting rotor. Each rotor was driven by air jet running against the fluting directly from the nozzles drilled on the inner surface of a stator. The rotor was supported by the dynamic pressure of air. A series of tests were made by changing conical angles, number and angle of the flutings, and driving air pressure. The results were as follows.(1) The rotor speed increases with increasing the air pressure. (2) When the stator conical angle is 92°, the optimum rotor conical angle is 108° for the upper fluting, and 102° for the under fluting. (3) The suitable number of flutings is about 40 for the upper fluting, and 20 for the under fluting. (4) The angle of flutings exerts influence considerably on the driving torque, and the most suitable angle is 45° for the upper fluting, and 25° for the under fluting.