کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7002112 | 1454786 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Performance analysis of aerostatic journal micro-bearing and its application to high-speed precision micro-spindles
ترجمه فارسی عنوان
تجزیه و تحلیل عملکرد میکرو تحمل مجله ی هوافضا و کاربرد آن در میکرو اسپیندل دقت بالا با سرعت بالا
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کلمات کلیدی
میکرو بلبرینگ، فشار آئرواستاتیک، فشار آیرودینامیکی، ظرفیت بار، میکرو اسپیندل،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
چکیده انگلیسی
An aerostatic journal micro-bearing has advantages of simple structure, almost zero friction and increasable load capacity due to aerodynamic pressure effect, which makes it a possible choice for high-speed and precision micro-rotatory machines. This study comprehensively investigates the effects of restriction, structure and operation parameters on the performance of an aerostatic journal micro-bearing using numerical models. The numerical models are verified on a prototype aerostatic journal bearing. Considering both the performance requirement and current machining capacity, the restriction parameters of 8-12â¯Î¼m in average bearing clearance and 0.08-0.14â¯mm in orifice diameter are recommended. Another focus of this study is the aerodynamic pressure effect on the performance of micro-bearing, which is thoroughly investigated from the aspects of restriction, structure and operation parameters. The aerodynamic pressure effect is outstanding only at ultra-high speeds and large eccentricities. Two prototypical high-speed precision micro-spindles are developed and their micro-tools with a diameter of 3.175â¯mm are directly supported by the micro-bearing. The aerodynamic pressure effect resulting from the ultra-high rotational speeds can improve the performance of micro-spindles under loading. However, the low rotational accuracy and balance quality compromise their performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tribology International - Volume 120, April 2018, Pages 476-490
Journal: Tribology International - Volume 120, April 2018, Pages 476-490
نویسندگان
Hang Xiao, Wei Li, Zhixiong Zhou, Xiangming Huang, Yinghui Ren,