磨粉机磨辊齿型参数与功耗关系研究
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摘要
通过分析磨粉机在皮磨系统研磨物料粒度与齿型参数的关系,确定邦德理论更适用磨粉机功耗关系研究。将粒径等参数带入邦德公式可知,功耗的影响因素与齿型、物料特性、磨辊速度、辊长、轧距、研磨时间和研磨前后的颗粒粒径有关。以Ⅰ～Ⅰ皮磨系统为研究对象,取轧距分别为0.8、0.6、0.4、0.2 mm,并做适当简化,运用Matlab绘出皮磨系统的功耗与齿深的关系图。由图可知,功耗随着齿辊磨损而逐渐增大。当磨损达到一定程度时,功耗变化急剧增大。由于功耗是评判磨辊是否需要拉丝或更换的重要指标,根据邦德定理从理论角度建立磨粉机功耗数学模型,为进一步研究齿辊磨损寿命与能耗关系提供理论参考。
Based on the analysis of the relationship between granularity of ground material and the tooth profile parameter of roller mill, Bond theory of power dissipation was selected to study power consumption of the roller mill. It showed that power consumption was affected by flute profile, material characteristics, roller speed, roll length, roll clearance, grinding time and the particle sizes before and after grinding. The relational graph of power consumption with tooth depth in break system was drawn up by Matlab and simplified properly, taking Ⅰ～Ⅳ break system as the research object, with roll clearance of 0.8, 0.6, 0.4, 0.2 mm, respectively. The results showed that the power consumption increased gradually with the increase of the wear extent of flute. When the wear reached a certain degree, the power consumption changed sharply. Since power consumption is one of the important indicators to judge whether the roller needs drawbench or to be changed, the power consumption mathematic model based on Bond theory provides reference for further study on the relationship between wear of tooth roller and energy consumption.
Based on the analysis of the relationship between granularity of ground material and the tooth profile parameter of roller mill, Bond theory of power dissipation was selected to study power consumption of the roller mill. It showed that power consumption was affected by flute profile, material characteristics, roller speed, roll length, roll clearance, grinding time and the particle sizes before and after grinding. The relational graph of power consumption with tooth depth in break system was drawn up by Matlab and simplified properly, taking Ⅰ～Ⅳ break system as the research object, with roll clearance of 0.8, 0.6, 0.4, 0.2 mm, respectively. The results showed that the power consumption increased gradually with the increase of the wear extent of flute. When the wear reached a certain degree, the power consumption changed sharply. Since power consumption is one of the important indicators to judge whether the roller needs drawbench or to be changed, the power consumption mathematic model based on Bond theory provides reference for further study on the relationship between wear of tooth roller and energy consumption.
引文
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[2]阮竞兰,武文斌.粮食机械原理及应用技术[M].北京:中国轻工业出版社,2007.
[3]顾尧臣.粮食加工设备工作原理、设计和应用[M].武汉:湖北科学技术出版社,1998.
[4]陈炳福,等.小麦制粉与利用[M].郑州:河南科学技术出版社,1988.
[5]朱天钦.制粉工艺与设备[M].成都:四川科学技术出版社,1988.
[6]HUSSEIN AL-BAYATY,MARCEL AMBROZE,MOHAMMEDZAKI AHMED.New effective power terms and right-angled triangle(RAT)power theory[J].International Journal of Electrical Power and Energy Systems,2017,88:130-140.
[7]郭长卿.小麦制粉能耗模型及控制方法研究[D].河南工业大学,2017.
[8]邓跃红,蔡膺泽,刘省秋,母福生.岩石在破碎过程中功耗三理论的讨论[J].湖南有色金属,1996(4):27-29.
[9]吴建明.Bond粉磨功指数研究与应用的进展[J].有色设备,2005(3):1-3+49.
[10]李田军,郭嘉,鄢泰宁.PDC碎岩功耗的理论分析与计算[J].地质与勘探,2016,52(5):937-941.
[11]高航,方存光,徐小荷.高压辊磨机两压辊功耗差异[J].中国有色金属学报,1999(4):856-860.
[12]李云龙,王淀佐.高压料层粉碎理论研究[J].长沙大学学报,2003(4):36-39.
[13]郎平振,饶绮麟,祁玉龙.盘式辊压破碎机单磨辊能耗分析[J].煤炭学报,2013,38(s1):249-255.
[14]王罗云,肖方阔,王晓曦.小麦加工过程中电能消耗的影响因素分析[J].现代面粉工业,2012,26(04):4-6.