径流和轴流LNG潜液泵使用寿命研究
Study on Service Life of LNG Submersible Pump with Radial and Axial Flow
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- 引用格式:
-
张兵强,孔云,程浩,陈乔丹,徐梦茹.径流和轴流LNG潜液泵使用寿命研究[J].天然气与石油,2012,30(6):0.doi:
.Study on Service Life of LNG Submersible Pump with Radial and Axial Flow[J].Natural Gas and Oil,2012,30(6):0.doi:
- DOI:
- 作者:
- 张兵强1 孔 云2 程 浩3 陈乔丹4 徐梦茹5
- 作者单位:
- 1.西南石油大学,2.中国石油西南油气田公司,3.中国石油青海油田公司天然气开发公司,4.中原石油勘探局工程建设总公司,5.中国石油新疆油田公司油气储运分公司
- 关键词:
- LNG潜液泵;泵轴轨迹;泵特性曲线;检修周期
LNG submersible pump; Pump shaft trajectory: Pump characteristic curve; Repair cycle
- 摘要:
- LNG潜液泵作为液化天然气生产环节不可缺少的动设备之一,其工作环境苛刻导致了LNG潜液泵的频繁检修,检修困难且维修成本高。通过安装在泵轴附近的位移探针来测定两种LNG潜液泵泵轴轨迹曲线变化,并利用实时数据采集系统对泵轴轨迹数据进行采集,然后根据泵轴轨迹数据分析LNG潜液泵的轴承、轴衬磨损情况。分析测试结果可知与轴流LNG潜液泵相比径流LNG潜液泵在不同的流量下泵轴轨迹均比较稳定,泵轴位移轨迹没有偏离泵轴中心,同时径流LNG潜液泵的特性曲线不存在不稳定的流量区域。这些特性使径流LNG潜液泵的轴承和轴衬磨损较轴流LNG潜液泵的磨损小,有利于延长泵轴衬和轴衬等部件的寿命以及LNG潜液泵的维修周期,降低LNG潜液泵的大修成本。
LNG submersible pump is one of indispensable dynamic equipment used in natural gas liquefaction process. Severe operating environments of such pump frequently result in difficult maintenance and high maintenance cost. Displacement probe installed near pump axle can determine pump axle track changes of LNG submersible pump with two kinds of diversion forms and real time data acquisition system in the pump can record pump axle tracks and wear of its bearings and axle bushings. Analysis on testing results show that pump axle tracks of radial flow LNG submersible pump are more stable than those of axial flow LNG submersible pump in different flow conditions, pump axle displacement tracks will not deviate from the pump shaft center and there is no unstable flow area in characteristic curve of radial flow LNG submersible pump. These characters result in smaller wear of bearings and axle bushings in radial flow LNG submersible pump than radial flow LNG submersible pump, which is beneficial to lengthen service life of such parts as bearings and axle bushings, lengthen maintenance cycle of LNG submersible pump and reduce its maintenance cost.