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以聚酯生产中使用的聚酯熔体输送泵为研究对象,对其实现国产化的必要性进行了论述,对泵的主要零件的选材、热处理、机械加工等作了详细地分析、探讨. 相似文献
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介绍了熔体泵轴承的工作状态,分析了影响熔体泵运行周期的主要因素,通过对熔体泵安装、运转、日常维护使其减少磨损,正确处理燕尾槽堵塞,以达到延长泵的使用寿命为目的。 相似文献
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聚酯熔体泵联轴节脱扣分析及防护 总被引:1,自引:0,他引:1
从聚酯熔体泵轴封的外泄漏量、泵出口压力、热媒夹套冷点等方面对熔体泵联轴节脱扣的原因进行了分析,提出了相应技改措施,如维持熔体正常泄漏量,改进控制程序,严格控制在线黏度仪的波动幅度,调节PID参数,严密监控温度,改进工艺及设备等。保证了熔体泵平稳运行。 相似文献
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Milan Kracalik Stephan Laske Michael Gschweitl Walter Friesenbichler Günter Rüdiger Langecker 《应用聚合物科学杂志》2009,113(3):1422-1428
A melt pump was assembled into the compounding line to ensure both sufficient time for diffusion process of polymer chains into the silicate gallery and sufficient mechanical shear energy for exfoliation of clay layers. The melt pump in front of the open co‐rotating twin‐screw extruder controls the throughput rate and the residence time, whereas the screw speed and screw geometry in the extruder determine the mechanical shear energy applied on the compound. Due to melt pump employment, the melt in metering zone can be accumulated, which results in higher mixing efficiency. It was found that using the melt pump leads to up to two times higher residence time and, consequently, higher level of material reinforcement as investigated by extensional rheology. Different melt pump adjustments, screw geometries, and screw speeds were tested and their effect on processing characteristics and material reinforcement was investigated. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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文章总结了现阶段BOPET生产线切片熔融挤出系统装置配置的技术趋势:PET切片熔融挤出以两台单螺杆挤出机串联方式配置,以提高熔体制备能力和改善熔体质量;熔体过滤器以烧结金属纤维作为过滤介质,以延长使用周期;熔体计量泵采用平面式并联齿轮泵或斜齿齿轮泵,以改善熔体输送的脉动;熔体管径设计主要控制熔体的停留时间,压力降不作为主要考虑因素。 相似文献