讨论了纺杯速度与成纱号数、成纱质量、气流和落棉、成纱断头等因素之间的关系；经综合 分析，认为短纤维纺纱中转杯纺纱机纺杯速度可分为三档：一档为1×105 r/min～1.5×1 05 r/min，用于纺细号纱；一档为5×104 r/min～1×105 r/min，用于纺中、粗号纱 ；一档为；2.5×104 r/min～5×104 r/min，用于纺非棉短纤维粗号纱。%The relation between rotor speed and some factors was discussed,these factors included the yarn count,yarn quality,airflow,noil and y arn breakage.The speed of short fibre spinning of rotor spinning machine could be classified as three grades,the first one is 1×105 rpm～1.5×10 5 rpm in spinning the fine count yarn,the second one is 5×104 rpm～1× 105 rpm in spinning medium and coarse count yarn,and the third one is 2. 5×104 rpm～5×104 rpm in spinning non|cotton short fibre yarn with coarse count.
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