• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Pump Users Symposium; 20030317-20030320; Houston,TX; US >UNDERSTANDING THE PERFORMANCE OF A PROGRESSIVE CAVITY PUMP WITH A METALLIC STATOR
【24h】

UNDERSTANDING THE PERFORMANCE OF A PROGRESSIVE CAVITY PUMP WITH A METALLIC STATOR

机译：了解带有金属定子的渐进腔泵的性能

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Analytical and experimental studies were carried out on a progressive cavity pump (PCP) fitted with a metallic stator with a fixed, positive clearance around the single helical rotor. This eliminates wear and greatly increases pump life, but it allows leakage or slip back to suction, which decreases the net output flow rate for a given imposed pressure rise. On the other hand, conventional PCPs have an elastomeric stator surrounding the rotor at zero clearance, so there is zero leakage until this stator wears out. Computations made on three analytical models provided insight into the internal leakage of this new type of PCP and pointed the way for further more definitive performance analysis in the future. These models, which utilized computational fluid dynamics (CFD), were: 1. Flow past a rotating cylinder between two closely fitted parallel plates, 2. Flow past a straight wall with a developed ("untwisted") stator flute moving axially along this wall—like a convergent-divergent bearing space that has wedge flow and the associated developed positive and negative pressures, and 3. Flow through a slit that models the clearance between the rotor and the surrounding stator (called the "model of the PCP"). Experiments were conducted under single-phase and two-phase conditions in order to acquire performance data for an actual PCP with a metallic stator. Pressure sensors installed inside the pump measured instantaneous cavity pressures and enabled comparison of these measurements with the CFD simulations. Liquid viscosity in the single-phase tests varied from 1 to 480 cP. Light oil with a viscosity of 42 cP was used for the multiphase tests, in which the intake gas void fraction was varied from zero to 80 percent. The test pump had a 40 mm (1.58 inches) rotor and was run over a speed range from 100 to 1200 rpm. The performance curves obtained from the experiments form a valuable database for users who would be interested in applying this new PCP pump type. More significantly, these results validate the use of PCPs with metallic stators in the production of heavy and extra-heavy crude oil.
机译：在配备有金属定子的渐进腔泵（PCP）上进行了分析和实验研究，该金属定子在单个螺旋转子周围具有固定的正间隙。这样可以消除磨损并大大延长泵的使用寿命，但是却允许泄漏或滑回吸气，从而在给定的施加压力升高的情况下降低了净输出流量。另一方面，传统的PCP具有零距离地围绕转子的弹性定子，因此零泄漏直到该定子磨损。通过三种分析模型进行的计算，可以深入了解这种新型PCP的内部泄漏，并为将来进一步进行更确定的性能分析指明了道路。这些模型利用了计算流体动力学（CFD），它们是：1.流过两个紧密配合的平行板之间的旋转圆柱体； 2.流过直壁的同时，直槽壁上有一个展开的（“未扭曲”的）定子槽沿该壁轴向移动-例如具有楔形流以及相关的正负压力的会聚-扩张轴承空间，以及3.流过模拟转子和周围定子之间间隙的缝隙（称为“ PCP模型”）。为了获得带有金属定子的实际PCP的性能数据，在单相和两相条件下进行了实验。安装在泵内的压力传感器可测量瞬时腔体压力，并将这些测量结果与CFD仿真进行比较。单相测试中的液体粘度为1至480 cP。粘度为42 cP的轻油用于多相测试，其中进气空隙率从零到80％不等。该测试泵的转子为40毫米（1.58英寸），转速为100至1200 rpm。从实验中获得的性能曲线为那些有兴趣应用这种新型PCP泵类型的用户提供了宝贵的数据库。更重要的是，这些结果证明了在重质和超重质原油的生产中使用带有金属定子的PCP。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号