振动研磨过程中研磨参数的定量研究

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清华大学辅仁网/2017-07-07

振动研磨过程中研磨参数的定量研究

陈恳^1,2, 阮和平¹, 吴丹^1,2, 刘飞¹

1. 清华大学机械工程系, 北京 100084;
2. 精密超精密制造装备及控制北京市重点实验室, 北京 100084

Quantitative study of the milling parameters in vibratory milling

CHEN Ken^1,2, Nguyen Hoa Binh¹, WU Dan^1,2, LIU Fei¹

1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control, Beijing 100084, China

摘要:

输出: BibTeX | EndNote (RIS)

摘要蛋白质的提取率取决于被提取的生物组织的粉末粒度, 因而生物组织的粉碎是蛋白质提取工程中的关键技术之一。目前, 生物组织粉碎较多采用振动球磨方式, 研磨产品粒度和研磨效率与研磨过程的特征参量如碰撞频率、碰撞能量有密切关系。为了研究研磨参数对研磨特征参量的影响规律, 该文采用事件驱动法(event driven method, EDM)建立了振动球磨机构中单个磨球在研磨罐内的动力学模型, 获得了振动频率、振动幅度和研磨罐直径对碰撞频率和碰撞能量的影响规律。结果表明: 碰撞频率、碰撞能量均随着振动频率和振动幅度增大而增大; 在相同的磨腔体积即研磨罐容积下, 随着研磨罐直径的增大碰撞频率和碰撞能量减小。该结论为研磨机构设计和参数选择提供理论依据和方法。

关键词 ：振动球磨,事件驱动法,研磨参数,碰撞频率,碰撞能量

Abstract：The extraction rate of protein extracted from biological tissue depends on the particle size of the biological tissue powder; therefore, the biological tissue particle sizes need to be smaller to improve protein extraction. Vibratory milling method is widely used for size reduction of biological tissue products with the milling product size and milling efficiency significantly affected by the milling process parameters, such as the collision frequency and impact energy. The effects of the milling parameters on the milling process were studied using the event driven method (EDM) to construct a dynamic model of one milling ball in a milling vial in a vibratory milling mechanism. The effects of the vibration frequency, the vibration amplitude and the milling vial diameter on the collision frequency and the impact energy were then investigated. Increases in the vibration frequency and amplitude increased the collision frequency and impact energy. For a fixed milling vial volume, an increase in the milling vial diameter reduced the collision frequency and the impact energy. The results provide a theoretical basis for milling mechanism design and parameter selection.

Key words：vibratory ball milling event driven method (EDM)milling parameter collision frequency impact energy

收稿日期: 2012-12-26 出版日期: 2016-04-01

ZTFLH:

TH79

通讯作者:吴丹,教授,E-mail:wud@tsinghua.edu.cnE-mail: wud@tsinghua.edu.cn

引用本文:

陈恳, 阮和平, 吴丹, 刘飞. 振动研磨过程中研磨参数的定量研究[J]. 清华大学学报（自然科学版）, 2016, 56(3): 328-333.
CHEN Ken, Nguyen Hoa Binh, WU Dan, LIU Fei. Quantitative study of the milling parameters in vibratory milling. Journal of Tsinghua University(Science and Technology), 2016, 56(3): 328-333.

链接本文:

http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2016.21.030或 http://jst.tsinghuajournals.com/CN/Y2016/V56/I3/328

图表:

图1　THPED 的研磨机构简图

图2　事件驱动法仿真流程

图3　磨球与研磨罐碰撞

表1　研磨罐的内部尺寸

图4　不同研磨罐直径下碰撞频率和单次碰撞能量

图5　不同振动幅度下碰撞频率和单次碰撞能量

图6　不同振动频率下碰撞频率和单次碰撞能量

图7　D₉₀随振动频率变化的实验和仿真结果

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