摘要
针对高压压裂泵现场施工中由于铜套裂纹引起液力端盘根密封总成快速失效的现象,提出了优化铜套开口角度α和底部圆角R,进行基于有限疲劳寿命的压裂泵盘根铜套优化设计方法。首先,通过现场施工中的4.5 in(1 in=2.54 cm)V形铜套损坏情况,估算了现有V形铜套的疲劳寿命为2830000次;然后,使用SolidWorks Simulation建立了4.5 in V形铜套的静力学有限元模型,反推确定了吸入缸压强传递系数为0.3,对4.5 in V形铜套进行了疲劳分析,计算了疲劳寿命为2797000次;最后,计算了4.5,4,3.75,3.25和5 in V形铜套在不同开口角度和圆角的疲劳寿命。结果表明:优化设计后的4 in V形铜套在开口角度改为120°后疲劳寿命增大了81.5倍,现场测试满足在液缸最大生命周期内不再产生疲劳裂纹;通过现场施工数据反推传递系数,验证疲劳寿命计算方法的有效性,优化设计了5种压力等级下铜套的开口角度和圆角。同时,为其他型号盘根铜套优化设计提供了参考方法。
In view of the phenomenon of rapid failure of hydraulic end packing assembly caused by copper sleeve crack in high-pressure fracturing pump construction,an optimization design method based on finite fatigue life was proposed by optimize the opening angle α and bottom fillet of copper sleeve R.Firstly,the fatigue life of the existing V copper sleeve is estimated to be 2830000 times by the damage of 4.5 in V-shaped copper sleeve in field construction;Then,the static finite element model of 4.5 V-shaped copper sleeve was established using SolidWorks Simulation,and the pressure transfer coefficient of suction cylinder was determined to be 0.3,fatigue analysis of 4.5 in V-shaped copper sleeve was carried out,and the fatigue life was calculated to be 2797000 times;Finally,the fatigue lives of 4.5,4,3.75,3.25 and 5 in V-shaped copper sleeves at different opening angles and fillet corners were calculated.The results show that the fatigue life of the optimized 4 in V-shaped copper sleeve is increased by 81.5 times after the opening angle is changed to 120°,which can satisfy the maximum life cycle of the cylinder without fatigue cracks.The effectiveness of the fatigue life calculation method was verified by the transfer coefficient of the field construction data,and the opening angle and fillet of the copper sleeve under five pressure levels were optimized.At the same time,it provides a reference method for the optimization design of other types of packing copper sleeve.
作者
王波
王江阳
赵崇胜
黄鲲鹏
程明皓
胡勇
WANG Bo;WANG Jiangyang;ZHAO Chongsheng;HUANG Kunpeng;CHENGMinghao;HU Yong(Sichuan Honghua Electric Co.,Ltd.,China Dongfang Electric Corporation,Chengdu 610036)
出处
《机械设计》
CSCD
北大核心
2023年第S02期168-174,共7页
Journal of Machine Design
基金
2019年第一批省级工业发展项目“iFrac压裂装备智能服务系统的研制”(金经信发(2019)10号)
关键词
铜套
盘根
疲劳寿命
电动压裂泵
液力端
优化设计
copper sleeve
packing
fatigue life
electric fracturing pump
hydraulic end
optimization design
