多种运行工况下离心泵组的管道应力分析

Pipe stress analysis of centrifugal pump units under various operating conditions

海港码头靠泊船型大小不一,船舶自带泵流量、压力不固定,当码头与库区距离远,船舶自带泵压力不够时,需在码头增设多台加压泵,且为适应大小不同的船型,匹配多台泵的组合运行方案。该码头加压泵选用离心泵,为解决不同运行方案下离心泵的管口受力和力矩过大的问题,根据API 610 Centrifugal pumps for petroleum,petrochemical,and natural gas industries标准,利用CAESARⅡ应力分析软件,以离心泵组最近的管道固定点为分析单元,给出备用泵管道温度的计算方法,将离心泵及进、出口管道作为整体进行分析。经对多种运行工况下离心泵管口及进、出口管道的详细应力分析,通过改变管道走向,给出了满足标准要求、便于操作检修、整齐简洁的离心泵进、出口管道布置方案。研究结果对多种运行工况下离心泵组的管道布置具有指导意义。

The size of berthing ships at seaports varies,and the flow and pressure of the ships' built-in pumps are not fixed.When the distance between the dock and the storage area is far,and the pressure of the ships' built-in pumps is insufficient,multiple booster pumps need to be added at the dock.To cater for different sizes of ships,an operation plan of multiple pumps combination should be provided.Centrifugal pump is selected as the booster pump for this seaport.To address the issue of excessive force and torque on the pump nozzle under different operating schemes,in accordance to API 610 Centrifugal pumps for petroleum,petrochemical,and natural gas industries,the CAESAR Ⅱ stress analysis software is used,with the nearest anchor point of the pump unit as the analysis unit.The calculation method for the temperature of the standby pump piping is provided,and the pump along with its inlet and outlet piping are analyzed as a whole.Through detailed stress analysis of pump nozzle and pump inlet and outlet piping systems under various operating conditions,we have developed a piping arrangement that not only complies with industry standards but also enhances operational ease and maintenance accessibility,while presenting a clean and orderly aesthetic.This was accomplished by altering the piping system's route.This study provides meaningful guidance to piping arrangement of centrifugal pump under various operating conditions.