摘要
以封隔器锁紧机构即锁环的简化模型为研究对象,分析封隔器坐封时锁环齿牙与中心管上齿牙的接触情况,得出当量摩擦因数f当是检验锁环能否自锁的关键指标。锁环承受载荷时回弹卡紧中心管,上齿面与中心管齿牙接触,当量摩擦因数只与齿前角θ1有关,齿后角θ2的作用主要是增大锁环齿牙的强度。基于有限元分析和正交优化方法,分析齿后角θ2、齿牙间距p、齿牙高度h、齿牙尖角圆弧半径r等4个几何参数对锁环齿牙承载时的影响,得出影响最小的最优组合为:齿后角θ2=70°,齿牙间距p=3 mm,齿牙高度h=1 mm,齿牙尖角圆弧半径r=0.2 mm。
The simplified model of the locking mechanism, namely the locking ring of packer, was taken as the object of study. The contact of the locking ring tooth and center tube tooth in packer setting was analyzed. It was found that the equivalent friction coefficient is the key index to check whether the ring could be locked by itself. The locking ring springs back and clamps the center tube when it bears load. The upper tooth surface contacts the center tube tooth. The equivalent friction coefficient is related only to the tooth rake angle θ1. The effect of the tooth clearance angle θ2 is mainly to increase the strength of locking ring tooth. On the basis of finite element analysis and orthogonal optimization method, the effects of the four geometric parameters including the tooth clearance angle θ2, tooth spacing p, tooth height h and tooth front point arc radius r on locking ring tooth load bearing were analyzed. The optimal combination of the least influence was obtained as follows ： θ2 = 70° , p = 3 mm, h = 1 mm and r = 0.2 mm.
出处
《石油机械》
北大核心
2014年第4期90-93,共4页
China Petroleum Machinery
关键词
封隔器
锁环
当量摩擦因数
齿后角
齿牙间距
齿牙高度
齿牙尖角圆弧半径
正交优化
有限元分析
packer
locking ring
equivalent friction coefficient
tooth clearance angle
tooth spacing
tooth height
tooth front point arc radius
orthogonal optimization
finite element analysis
作者简介
第一作者简介：周晓君，教授，博士研究生导师，生于1963年，主要研究方向为油气田开采、机械电子工程、水介质液压传动系统的研究与应用等。地址：（200072）上海市闸北区。
通信作者：段志明，E—mail：dzmlhr@163．com。
