基于RCM的油库输油泵风险评价及运行可靠性分析

RISK ASSESSMENT AND OPERATION RELIABILITY ANALYSIS OF OIL PUMPS IN OIL DEPOT BASED ON RCM

离心泵作为外输管道中的重要设备,其安全可靠的运转是油库完成输油活动的基础。以可靠性为中心的维修作为先进的维修管理技术,可加强对设备的管理,规范设备的使用。该技术可对故障模式影响及危害性进行分析,确定中高风险及高失效频率设备。文章以某油库外输离心泵为例,通过采集历年来大修时间,对其运行时间数据进行分析,进而通过K-S检验确定其服从威布尔分布;采用该模型得出离心泵的使用可靠性趋势,并在此基础上给出了在4种可靠度下离心泵的预防性检查周期。使用RCM法分析维修周期后,避免了维修过度和维修不足问题,控制了维修费用,提高了设备利用率。分析结果表明:现阶段油库离心泵的平均无故障时间为3046.179 h,且应在34 d左右进行1次预防性检查。

The centrifugal pump is important equipment in the external pipeline.It's safe and reliable operation is the basis for the oil depot to complete the oil transportation activity.As advanced maintenance management technology,reliability-centered maintenance(RCM)can strengthen the management of equipment and standardize the use of equipment.This technology can be used to analyze the effects and hazards of failure modes so as to determine medium and high risk and high failure frequency equipment.Takingthe centrifugal pumps of certain oil depot as an example,this paper analyzed the running time data of the centrifugal pumps in this oil depot through collecting the overhaul time of the pumps over the years;then it determined their compliance with the Weibull distribution by K-S test;and this model was used to obtain the trend of centrifugal pump reliability.Based on this,the paper provided the inspection maintenance period of the centrifugal pumps under four kinds of reliability.After using the RCM method to analyze the maintenance cycle,the problems of over-maintenance and under-maintenance could be avoided;maintenance costs could be controlled and the utilization of equipment was improved.The results show that the average trouble-free time of the centrifugal pumps of the oil depot at this stage is 3046.179 hours,and a preventive maintenance should be carried out in about 34 days.