Gear Pump Instructionmaag马格挤出泵资料.ppt

* * * * * * * * * Emphasize benefits of the gear pump assisted extrusion: Steady product discharge The most striking feature of an extrusion line with an integral gear pump is the exceptional improvement of throughput variation. This results in a direct improvement of product quality, because it reduces the variations of product dimensions in the extrusion direction. To a great extent, the pump damps out production fluctuations caused by the extruder. It should be noted that people usually speak not of actual output fluctuations, but of pressure fluctuations linked to the output variations by the die’s characteristic. This is not surprising, because where the pump is used, the backpressure is measured to be on the safe side in any case. When interpreting these, one should bear in mind that pressure variations may also have other causes, such as melt temperature variations. Start-up time can be reduced dramatically(3-4 times faster) because gear pump gives stable output from the very beginning of the process * A Textron subsidiary. 11/15/06 A Textron subsidiary. gear pump technology 11/15/06 A Textron subsidiary. gear pumps 是容积式回转泵 用于运输量不断高压力下 提供一个连续的，脉动流 是首选的一些应用从实验室到石油 聚合物的应用 用于： -压力积聚转移 -计量（准确度） 11/15/06 A Textron subsidiary. operating principles of gear pumps 功能的齿轮： 一代吸在进气侧 运输输送从入口到出口侧 位移的介质在出口侧 密封之间的入口和出口侧 传输半年的驱动扭矩从传动轴从动轴 11/15/06 A Textron subsidiary. parts of the extrusion gear pump 适配器热电偶 孔加热墨盒或液体加热/冷却 传动轴 滑动轴承 焊（轴密封） 冷却环焊（选项） 短轴 住房/覆盖 11/15/06 A Textron subsidiary. parts of the polymer gear pump endplate/ cover endplate/ cover journal bearings journal bearings housing shafts location of shaft seal 11/15/06 A Textron subsidiary. forces on short shaft and drive shaft KW: short shaft AW: drive shaft R: resulting force (combination of single forces) 11/15/06 A Textron subsidiary. media flow inside the gear pump 排气的一边 流动方向 吸力面 11/15/06 A Textron subsidiary. ? ? ? ? 流向 internal leakage streams 1.轴承润滑油流 （约0.5 - 1%的总流量） 2.回流？轴向间隙” （约80%余卷损失） 3