中南大学学报（自然科学版）
中南大學學報（自然科學版）
중남대학학보（자연과학판）
JOURNAL OF CENTRAL SOUTH UNIVERSITY
2009年
5期
1281-1287
,共7页
破煤理论%截割试验台%截齿排列%截割扭矩%块煤率
破煤理論%截割試驗檯%截齒排列%截割扭矩%塊煤率
파매이론%절할시험태%절치배렬%절할뉴구%괴매솔
cutting coal theory%cutting testbed%picks arrangement%cutting torque%lump coal percentage
根据采煤机破煤理论,研制煤岩截割试验台;根据不同的滚筒叶片截齿排列、螺旋叶片头数,研制4种不同的试验滚筒.以此为基础,在试验台上对4种不同截齿排列的滚筒进行截割性能试验,分析不同滚筒截割扭矩的最大值、最小值、均值、方差等参数;同时,对截落煤岩的块度进行分级处理,研究不同截齿排列滚筒截割块煤率.研究结果表明:对同一直径、不同叶片头数、不同截齿排列的滚筒,在截割时,随着螺旋叶片头数的增多,其载荷波动性减小;在2头螺旋叶片滚筒中,棋盘式滚筒的扭矩均值、方差等统计参数值均比顺序式的小,而棋盘式的块煤率比顺序式的大;具有3头螺旋叶片的畸变Ⅰ式和畸变Ⅱ式滚筒,在截割扭矩的统计参数值中除畸变Ⅰ式的方差小于畸变Ⅱ式的方差外,其余参数基本相等;并且,在4种滚筒中,畸变Ⅰ式截割时滚筒载荷的波动性最小,块煤率最大.
根據採煤機破煤理論,研製煤巖截割試驗檯;根據不同的滾筒葉片截齒排列、螺鏇葉片頭數,研製4種不同的試驗滾筒.以此為基礎,在試驗檯上對4種不同截齒排列的滾筒進行截割性能試驗,分析不同滾筒截割扭矩的最大值、最小值、均值、方差等參數;同時,對截落煤巖的塊度進行分級處理,研究不同截齒排列滾筒截割塊煤率.研究結果錶明:對同一直徑、不同葉片頭數、不同截齒排列的滾筒,在截割時,隨著螺鏇葉片頭數的增多,其載荷波動性減小;在2頭螺鏇葉片滾筒中,棋盤式滾筒的扭矩均值、方差等統計參數值均比順序式的小,而棋盤式的塊煤率比順序式的大;具有3頭螺鏇葉片的畸變Ⅰ式和畸變Ⅱ式滾筒,在截割扭矩的統計參數值中除畸變Ⅰ式的方差小于畸變Ⅱ式的方差外,其餘參數基本相等;併且,在4種滾筒中,畸變Ⅰ式截割時滾筒載荷的波動性最小,塊煤率最大.
근거채매궤파매이론,연제매암절할시험태;근거불동적곤통협편절치배렬、라선협편두수,연제4충불동적시험곤통.이차위기출,재시험태상대4충불동절치배렬적곤통진행절할성능시험,분석불동곤통절할뉴구적최대치、최소치、균치、방차등삼수;동시,대절락매암적괴도진행분급처리,연구불동절치배렬곤통절할괴매솔.연구결과표명:대동일직경、불동협편두수、불동절치배렬적곤통,재절할시,수착라선협편두수적증다,기재하파동성감소;재2두라선협편곤통중,기반식곤통적뉴구균치、방차등통계삼수치균비순서식적소,이기반식적괴매솔비순서식적대;구유3두라선협편적기변Ⅰ식화기변Ⅱ식곤통,재절할뉴구적통계삼수치중제기변Ⅰ식적방차소우기변Ⅱ식적방차외,기여삼수기본상등;병차,재4충곤통중,기변Ⅰ식절할시곤통재하적파동성최소,괴매솔최대.
According to the cutting coal theory of the shearer, the cutting testbed of the coal and rock was developed. And four type shearer drums (the sequence, the punnett square, the aberrance Ⅰ and the aberrance Ⅱ) were designed according to the different picks arrangement and the helical vane starts. Based on this, the experiments of cutting property of the four different drums were carried on, and the statistics (the maximum, the minimum, the mean, the variance) of the cutting torques of the four drums were analyzed. At the same time, the cut particles were graded for studying the lump coal percentage of the four drums. The results indicate that the load fluctuation of the cutting drums decreases with the increase of helical vane when the drums have the same diameter, different helical vane starts and different picks arrangement. In the 2-starts vane drums (the sequence and the punnett square), the statistics of the torque of the punnett square is smaller than that of the sequence, but the lump coal percentage of the punnett square is bigger than that of the sequence. In the 3-starts vane drums (the aberrance Ⅰ and the aberrance Ⅱ), the statistics of the torque of the two drums are the same except that the variance of the aberrance Ⅰ is smaller than the aberrance Ⅱ, and the aberrance Ⅰ has the minimum load fluctuation and the maximum lump coal percentage in the four type drums.
