Please wait a minute...
工程设计学报
工程设计学报  2015, Vol. 22 Issue (6): 607-612    DOI: 10.3785/j.issn. 1006-754X.2015.06.015
通用零部件设计     
牙轮钻头弹性球面浮动套轴承的设计与优化
何 畏，肖 祥，陈 波，孙春梅，陈 洋，贺军超
西南石油大学 机电工程学院，四川 成都 610500
Design and optimization of elastic spherical floating-ring journal bearing of roller bit
HE Wei, XIAO Xiang, CHEN Bo, SUN Chun-mei, CHEN Yang, HE Jun-chao
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
 全文: PDF(2291 KB)   HTML
摘要： 针对现有牙轮钻头浮动套轴承存在的偏转问题和严重应力“边缘效应”，设计了一种新型的弹性球面浮动套轴承.通过有限元方法对球面和平面浮动套的力学性能进行对比分析，并研究了矩形、椭圆形、圆形、三角形四种槽的中间修形对球面浮动套内外接触线上等效应力影响，优化了槽的尺寸.结果表明：球面浮动套的力学性能优于平面浮动套，但2种浮动套都存在严重的应力“边缘效应”；通过中间修形有效改善了浮动套应力“边缘效应”，其中圆形槽的效果最好且便于加工；当圆形槽半径R=0.6 mm、圆心到内外表面的距离比a/b=19/21时，内外接触线上的最大等效应力之差减小到8.91 MPa，较优化前降低33.3%，减缓轴承局部过早发生疲劳失效.
关键词： 牙轮钻头;  球面浮动套;  开口槽;  边缘效应;  修形    
Abstract: Aiming at the problem of deflection and the serious stress “edge effect” of rock bit floating-ring journal bearings, a new type of elastic spherical floating-ring journal bearings was designed. Through the finite element method, the spherical and plane rock bit floating-ring journal bearing's mechanical properties were comparatively analyzed. The effect of intermediate modification on four groove shape of rectangular, oval, round and triangle to the spherical floatingring bearings inside and outside contact stress was studied, and then the slot size was optimized. The results showed that: the mechanical properties of spherical floating-ring journal bearings were better than the plane floating-ring journal bearings, but there were serious stress “edge effect” of the two kinds of floating-ring journal bearings; the intermediate modification method could effectively improve the stress “edge effect” of floating-ring journal bearings. The circular groove was the most effective shape and it was easy to be manufactured. When the radius of circular groove R=0.6 mm, the radio of distance from center of the circle to the inside and outside of surface was a/b=19/21, the maximum equivalent stress value difference between inner and outer contact line was reduced to 8.91 MPa, 33.3% lower than before. The new design prevents the floating-ring journal bearing occurring fatigue failure too early.
Key words: roller bit    spherical floating-ring    open slot    edge effect    correction of the flank shape
收稿日期: 2015-04-13 出版日期: 2015-12-28
基金资助:

四川省科技支撑计划项目（2014GZ0153）
作者简介: 何畏（1961-），男，四川南充人，副教授，高级工程师，从事石油、天然气装备的设计与研究，E-mail:xuezhu9@sin.com.
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章　　

引用本文:

何 畏，肖 祥，陈 波，孙春梅，陈 洋，贺军超. 牙轮钻头弹性球面浮动套轴承的设计与优化[J]. 工程设计学报, 2015, 22(6): 607-612.

HE Wei, XIAO Xiang, CHEN Bo, SUN Chun-mei, CHEN Yang, HE Jun-chao. Design and optimization of elastic spherical floating-ring journal bearing of roller bit. Chinese Journal of Engineering Design, 2015, 22(6): 607-612.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn. 1006-754X.2015.06.015    或    https://www.zjujournals.com/gcsjxb/CN/Y2015/V22/I6/607

[1] 汤亮, 何仁杰, 龚发云, 李飞扬, 刘冠军, 杨敏. 变风载下风电齿轮箱内部激励规律研究及动态特性优化[J]. 工程设计学报, 2020, 27(2): 212-222.
[2] 王哲, 陈勇, 曹展, 李光鑫, 左扣成. 纯电动汽车两挡变速器减振降噪研究[J]. 工程设计学报, 2019, 26(3): 280-286.
[3] 邓嵘, 侯凯, 李孟华, 李向东. 混合式单牙轮钻头破岩性能研究[J]. 工程设计学报, 2018, 25(3): 262-269.
[4] 周镇宇, 唐进元, 董建雄. 同功重比修形斜齿和直齿面齿轮性能对比研究[J]. 工程设计学报, 2016, 23(4): 338-344.