تحليل عملكرد ماشين بارگيري مرحله اي با استفاده از مهندسي قابليت اطمينان

Beam stage loader Performance Analysis using Reliability

ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ اﻫﻤﯿﺖ زﻏﺎلﺳﻨﮓ در ﺗﻮﻟﯿﺪ اﻧﺮژي، ﺗﻼشﻫﺎي زﯾﺎدي ﺟﻬﺖ ﻣﮑﺎﻧﯿﺰه ﮐﺮدن ﻋﻤﻠﯿﺎت اﺳﺘﺨﺮاج و در ﻧﺘﯿﺠﻪ اﻓﺰاﯾﺶ ﺗﻮﻟﯿﺪ آن ﺷﺪه اﺳﺖ. ﯾﮑﯽ از ﻣﺎﺷﯿﻦآﻻت ﻣﻬﻢ در ﻣﻌﺎدن ﺟﺒﻬﻪﮐﺎر ﻃﻮﻻﻧﯽ ﻣﮑﺎﻧﯿﺰه زﻏﺎل، ﻣﺎﺷﯿﻦ ﺑﺎرﮔﯿﺮي ﻣﺮﺣﻠﻪاي )BSL( اﺳﺖ ﮐﻪ ﻋﻤﻠﮑﺮد آن ﺑﺎ ﻣﯿﺰان ﺗﻮﻟﯿﺪ راﺑﻄﻪ ﻣﺴﺘﻘﯿﻢ دارد، ﺑﮕﻮﻧﻪاي ﮐﻪ در ﺻﻮرت ﺗﻮﻗﻒ آن،ﮐﻞ ﺳﯿﺴﺘﻢ ﺗﻮﻟﯿﺪ ﻣﺘﻮﻗﻒ ﺧﻮاﻫﺪ ﺷﺪ. از اﯾﻨﺮو ﺗﻌﯿﯿﻦ ﻗﺎﺑﻠﯿﺖ اﻃﻤﯿﻨﺎن اﯾﻦ ﻣﺎﺷﯿﻦ از اﻫﻤﯿﺖ ﺑﺎﻻﯾﯽ ﺑﺮﺧﻮردار اﺳﺖ. در اﯾﻦ ﻣﻘﺎﻟﻪ ﺑﺎ اﺳﺘﻔﺎده از دادهﻫﺎي ﺧﺮاﺑﯽ ﺛﺒﺖ ﺷﺪه در ﻃﯽ دو ﺳﺎل در ﻣﻌﺪن زﻏﺎلﺳﻨﮓ ﻃﺒﺲ، ﻗﺎﺑﻠﯿﺖ اﻃﻤﯿﻨﺎن ﻣﺎﺷﯿﻦ ﺑﺎرﮔﯿﺮي ﻣﺮﺣﻠﻪاي ﺑﺎ ﺗﻘﺴﯿﻢ ﺑﻪ ﭼﻬﺎر زﯾﺮ ﺳﯿﺴﺘﻢ ﺑﺎرﮔﯿﺮي، ﺗﻨﻈﯿﻢ و ﺗﺮاز، ﻣﮑﺎﻧﯿﮏ و ﺑﺮق ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﺘﺎﯾﺞ ﺗﺤﻠﯿﻞ ﭘﺎرﺗﻮ ﻣﻌﻠﻮم ﺷﺪ ﮐﻪ ﺳﯿﺴﺘﻢ ﺑﺮق ﺑﺎ 44/4% ﮐﻞ ﺧﺮاﺑﯽﻫﺎ، داراي ﺑﺎﻻﺗﺮﯾﻦ ﻓﺮاواﻧﯽ ﺧﺮاﺑﯽ در ﺑﯿﻦ زﯾﺮﺳﯿﺴﺘﻢﻫﺎ ﻣﯽﺑﺎﺷﺪ و ﺑﺎﯾﺪ ﺗﻮﺟﻪ وﯾﮋهاي ﺑﻪ آن ﺷﻮد. ﻧﺘﺎﯾﺞ ﺗﺤﻠﯿﻞﻫﺎي آﻣﺎري ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ رﻓﺘﺎر ﺧﺮاﺑﯽ ﺳﯿﺴﺘﻢ ﺑﺎرﮔﯿﺮي از ﺗﺎﺑﻊ ﻻگﻧﺮﻣﺎل ﺳﻪ ﭘﺎراﻣﺘﺮي، زﯾﺮﺳﯿﺴﺘﻢﻫﺎي ﺗﻨﻈﯿﻢ و ﺗﺮاز و ﻣﮑﺎﻧﯿﮏ از ﺗﺎﺑﻊ ﮔﺎﻣﺎ ﻋﻤﻮﻣﯽ ﭼﻬﺮ ﭘﺎراﻣﺘﺮي و زﯾﺮﺳﯿﺴﺘﻢ ﺑﺮق از ﻣﺪل ﻗﺎﻧﻮن ﺗﻮان ﺗﺒﻌﯿﺖ ﻣﯽﮐﻨﻨﺪ. ﻧﺘﺎﯾﺞ ﻣﺤﺎﺳﺒﺎت ﻧﺸﺎن داد ﮐﻪ ﻗﺎﺑﻠﯿﺖ اﻃﻤﯿﻨﺎن ﻣﺎﺷﯿﻦ ﺑﺎرﮔﯿﺮي ﻣﺮﺣﻠﻪاي ﻃﺒﺲ ﭘﺲ از ﻃﯽ 80 ﺳﺎﻋﺖ ﻋﻤﻠﯿﺎت، ﺗﻘﺮﯾﺒﺎً ﺑﻪ ﺻﻔﺮ ﻣﯽرﺳﺪ

Considering the importance of coal in the energy production, there has been a lot of effort put on mechanizing its deduction process and as a result, a decrease in production. One of the important equipments in long wall coal mine is beam stage loader (BSL) which performance is directly connected to the mine’s production level, as if its stop can result in a whole system stop; Thus, evaluating its reliability is of a great importance. In this lecture, with using two years data in Tabas coal mine, BSL’s reliability has been determined by dividing its system into four sub-systems of loading, adjustment, mechanical and electrical. Regarding the Pareto analysis results, it is revealed that the electrical system with 44.4% of the total amount of failures has the greatest abundance among all other systems and requires more cautious observation. The results of statistical analysis unearth that the loading sub-system’s collapsing behavior obeys the 3 parameters log normal function, while it is 4 parameters general gama function for adjustment and mechanical sub-systems and power law proces for electrical sub-system. The results also show that the reliability of the BSL after 80 hours of operation reaches almost zero.