自动测硫仪在煤质检验中的使用及维护

硫为煤炭有害物质成分之一,其含量将直接影响煤炭品质,是判断煤炭品质的基础。在社会经济日益发展的背景下,煤炭用量逐渐加大,致使环境污染现象日益严重,所以有必要采用自动测硫仪来检测煤炭质量,但是仪器设备在运行的过程中会出问题,必须定期维护保养。文章就自动测硫仪应用于煤质检验的步骤做了具体的分析,并且提出了一些维修措施。

10kV真空断路器性能与运维关注重点

在中低压电力系统中,真空断路器与其他开关比较而言,由于具有开断容量大,灭弧性能好,机械寿命长,运行维护工作少,检修工作量小,检修周期长等显著特点,在电力系统被广泛应用。对于一线运行人员来说,加强对真空断路器性能及运维知识学习,确保真空断路器的安全稳定运行,是当前迫在眉睫的问题。本文对真空断路器的主要性能,日常运维、检修工作中,应该注意真空断路器的过电压保护、触头行程和超程、真空度降低判断、合理选择真空断路器的保险系数、定期检测等几个方面进行简要论述,为变电运行工作人员安全运维真空断路器提供一些思路和参考。

Dynamic Bayesian Network Based Prognosis in Machining Processes

Condition based maintenance (CBM) is becoming more and more popular in equipment main-tenance. A prerequisite to widespread deployment of CBM technology and practice in industry is effective diagnostics and prognostics. A dynamic Bayesian network (DBN) based prognosis method was investigated to predict the remaining useful life (RUL) for an equipment. First, a DBN based prognosis framework and specific steps for building a DBN based prognosis model were presented. Then, the corresponding inference algorithms for DBN based prognosis were provided. Finally, a prognosis procedure based on particle filtering algorithms was used to predict the RUL of drill-bits of a vertical drilling machine, which is commonly used in industrial process. Preliminary experimental results are promising.