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全聚纺纱体内纤维转移规律对成纱性能的影响 被引量:1
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作者 杨敏 谢春萍 刘新金 《纺织学报》 EI CAS CSCD 北大核心 2016年第1期35-40,51,共7页
为探讨全聚纺集聚区对成纱质量的影响,在加装全聚纺装置的QFA1528型细纱机上,分别采用4种集聚负压(1 600、2 000、2 400、2 800 Pa),4种槽型的吸风插件(水滴槽、短斜槽、直槽、长斜槽),3种不同的气流导向片(A型、B型、C型),纺制线密度为... 为探讨全聚纺集聚区对成纱质量的影响,在加装全聚纺装置的QFA1528型细纱机上,分别采用4种集聚负压(1 600、2 000、2 400、2 800 Pa),4种槽型的吸风插件(水滴槽、短斜槽、直槽、长斜槽),3种不同的气流导向片(A型、B型、C型),纺制线密度为9.7 tex的纯棉全聚纺纱线,并对纱线的各项性能指标进行测试。采用示踪纤维方法对纱体内纤维的内外转移系数进行测量,分析不同集聚区工艺对成纱质量的影响。结果表明:当负压为2 000 Pa时,纱线条干和强力最好,当负压为2 800 Pa时,3 mm以上的有害毛羽最少;当吸风插件选择短斜槽时,纱线条干最好,选择长斜槽时,纱线的强力和毛羽最好;当气流导向片选择B型时,纱线的条干最好,选择C型时,纱线的强力最好。 展开更多
关键词 全聚纺 集聚负压 吸风插件 气流导向片
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Control of Collection Efficiency for Axial Flow Cyclone Dust Collectors with Fixed Guide Vanes and with Funnel Shaped Exit Pipes 被引量:4
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作者 Akira Ogawa Masaru Arakawa 《Journal of Thermal Science》 SCIE EI CAS CSCD 2006年第3期240-250,共11页
The experimental result of the collection efficiency of the axial flow cyclone with the fixed guide vanes is lower than that with the tangential inlet pipe to the cyclone body due to the weak angular momentum transfer... The experimental result of the collection efficiency of the axial flow cyclone with the fixed guide vanes is lower than that with the tangential inlet pipe to the cyclone body due to the weak angular momentum transfer given by flowing through the guide vanes. However, one of the interesting points is the control of the collection efficiency depended on the funnel shaped exit pipes. The collection efficiencies for these funnel shaped exit pipes are depended on the Froude number. Then, in this paper, the experimental results of the pressure drop and also the collection efficiency using the fly-ash particles and also the comparison of the calculated results of the collection efficiency with the experimental results are described i~ detail. 展开更多
关键词 Axial flow cyclone funnel shaped exit pipe fixed guide vanes pressure drop collection efficiency Froude number cut-Size
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Automatic Efficiency Optimization of an Axial Compressor with Adjustable Inlet Guide Vanes 被引量:1
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作者 Jichao Li Feng Lin +1 位作者 Chaoqun Nie Jingyi Chen 《Journal of Thermal Science》 SCIE EI CAS CSCD 2012年第2期120-126,共7页
The inlet attack angle of rotor blade reasonably can be adjusted with the change of the stagger angle of inlet guide vane (IGV); so the efficiency of each condition will be affected. For the purpose to improve the eff... The inlet attack angle of rotor blade reasonably can be adjusted with the change of the stagger angle of inlet guide vane (IGV); so the efficiency of each condition will be affected. For the purpose to improve the efficiency, the DSP (Digital Signal Processor) controller is designed to adjust the stagger angle of IGV automatically in order to optimize the efficiency at any operating condition. The A/D signal collection includes inlet static pressure, outlet static pressure, outlet total pressure, rotor speed and torque signal, the efficiency can be calculated in the DSP, and the angle signal for the stepping motor which control the IGV will be sent out from the D/A. Experimental investigations are performed in a three-stage, low-speed axial compressor with variable inlet guide vanes. It is demonstrated that the DSP designed can well adjust the stagger angle of IGV online, the efficiency under different conditions can be optimized. This establishment of DSP online adjustment scheme may provide a practical solution for improving performance of multi-stage axial flow compressor when its operating condition is varied. 展开更多
关键词 DSP Inlet guide vane EFFICIENCY Axial compressor Variable condition Control algorithm
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