基于风险评估的加速器预防性维护策略探讨  

Discussion on Accelerator Preventive Maintenance Strategy Based on Risk Assessment

作　　者：杨绍洲[1,2] 王胜军 侯明扬[1] YANG Shaozhou;WANG Shengjun;HOU Mingyang(Department of Medical Equipment, Nanfang Hospital of Southern Medical University, Guangzhou Guangdong 510515, China;Department of Medical Equipment, TCM-Integrated Hospital of Southern Medical University, Guangzhou Guangdong 510315, China)

机构地区：[1]南方医科大学南方医院设备器材科,广东广州510515 [2]南方医科大学中西医结合医院设备科,广东广州510315

出　　处：《中国医疗设备》2018年第6期162-165,共4页China Medical Devices

基　　金：广东省科学技术计划项目(2015A03040103 8)

摘　　要：目的根据加速器使用中的停机数据对其进行风险评估,动态调整风险级别,采取合理预防性维护措施,确保设备安全、可靠、经济运行。方法收集加速器12年的维修数据,进行统计分析得到加速器的可靠性参数。利用评分标准评价加速器的风险值,再结合加速器故障与月份的关系,优化加速器预防性维修的时机和频度。结果加速器运行12年共维护维修338次,合计1108.5 h,加速器年平均停机次数、年平均停机时间、年平均修复时间和年平均可用度分别为28.2次、92.4 h、3.3 h和0.97。在广州宜从每年2月份开始,加速器每3个月为一个周期进行预防性维修。第5年购买特级保修,每5~6年进行一次大修。结论使用风险评估方法对加速器维修历史数据进行分析,可以对加速器实现主动干预,从而降低设备在使用过程中的故障频次和风险,节省维修费用、提高设备可利用率。Objective The risk accessment technology was used to analyze the downtime data of the accelerator, and risk level of the accelerator was adjusted accordingly, then proper policy of preventive maintenance was provided to ensure the safe, reliable and economical operating of the accelerator. Methods Service data of 12 year had been collected, and then reliability analysis was applied to get the proper parameters, and risk level value was assigned to the machine, suggestion was put forward to optimize the preventive maintenance policy in combination with the relationship between downtime and month. Results There were 338 fault records during 12-year operation of the accelerator, and the downtime were 1108.5 hours all together. The average fault times, downtime, average annual repair time and availability per year were 28.2, 92.4 hours, 3.3 hours and 0.97 respectively. It’s better to start maintenance in the second month of the year with prerentive maintenance frequeny of 3 months in Guangzhou. It was suggested to buy a premium service contract in the 5th year and to conduct a complete preventive maintenance every 56 years. Conclusion Maintenance data can be used to optimize the preventive maintenance policy, thus measures can be taken in advance to reduce downtime and risk, save maintenance cost and increase the accelerator’s availability.

关 键 词：医用加速器 风险评估 可靠性 预防性维护 

分 类 号：TH774[机械工程—仪器科学与技术]