کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7153761 1462489 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influences of preload on the friction and wear properties of high-speed instrument angular contact ball bearings
ترجمه فارسی عنوان
تأثیر پیش بار بر خواص اصطکاک و سایش بالابرهای زاویه تماس با سرعت بالا
کلمات کلیدی
یاطاقان توپ، زاویه ای، تحمل زندگی، مدل پویا روش های پیش بارگیری نرخ بپوشید،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی
For starved-oil or solid lubrication of high-speed instrument angular contact ball bearings, friction heating and wear are the main reasons of bearing failures. This paper presents a dynamic wear simulation model to investigate the impacts of different preload methods and the changes of preload caused by wear on bearing wear life. The integral value QV of stress and sliding velocity in the contact ellipses between a ball and the inner and outer races determines friction heating and wear. The changes of QV with the friction coefficient and the wear volume under constant-force preload and fixed-position preload are analyzed. Results show that under the same initial preload, the QV decreases with an increase of the friction coefficient for both preload methods, and the latter is slightly larger. The wear of the ball and the race is equivalent to the ball diameter reduction. The QV of constant-force preload is almost not changed with a decrease of the ball diameter, but for fixed-position preload, the value decreases firstly and then increases substantially due to insufficient preload, and slipping occurs, the ball diameter is reduced by 0.025%, while the preload is reduced by 60.33%. An estimation of the bearing wear life under different preload methods requires a consideration of the changes in the wear rate of bearing parts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Aeronautics - Volume 31, Issue 3, March 2018, Pages 597-607
نویسندگان
, , , ,