牙轮钻头单金属密封数值模拟与优化
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摘要
针对钻井过程中牙轮钻头金属密封磨损严重、对井底振动比较敏感的问题,利用有限元软件对高压工况下的单金属动密封进行数值模拟,在此基础上利用逆解法对动密封面的泄漏率进行求解。结合正交实验设计确定出优化变量,采用Box-Behnken实验方法建立了单金属密封优化响应面模型,最后采用罚函数寻优法建立基于泄漏率最小的优化模型,并优化了密封的结构参数。结果表明,优化后单金属密封的性能得到了有效的改善,密封泄漏量得到降低,端面接触压力分布更加均匀,同时,验证了响应面优化法在单金属密封接触压力及泄漏量优化中具有可行性。
For the problem of the serious wearing of metal sealing of cone bit and its sensitivity to the bottom hole vibration during drilling process,the finite element software was used to simulate the dynamic sealing of single metal under high pressure.The leakage rate of dynamic sealing surface was solved by inverse method.Based on the orthogonal experimental design,the optimization variables were determined and the response surface model of single metal sealing optimization was established by Box-Behnken experimental design method.The penalty function optimization method was used to establish the optimization model based on the minimum leakage rate and the structural parameters of the sealing were optimized.The analysis results show that the performance of the optimized single metal sealing is effectively improved.The distribution of contact pressure is more uniform,and the feasibility of response surface optimization method in the optimization of contact pressure and leakage of single metal sealing are also verified.
For the problem of the serious wearing of metal sealing of cone bit and its sensitivity to the bottom hole vibration during drilling process,the finite element software was used to simulate the dynamic sealing of single metal under high pressure.The leakage rate of dynamic sealing surface was solved by inverse method.Based on the orthogonal experimental design,the optimization variables were determined and the response surface model of single metal sealing optimization was established by Box-Behnken experimental design method.The penalty function optimization method was used to establish the optimization model based on the minimum leakage rate and the structural parameters of the sealing were optimized.The analysis results show that the performance of the optimized single metal sealing is effectively improved.The distribution of contact pressure is more uniform,and the feasibility of response surface optimization method in the optimization of contact pressure and leakage of single metal sealing are also verified.
引文
[1]罗纬,何其翔.牙轮钻头金属浮动密封研究及设计[J].石油机械,1994,22(12):16-19
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[5]张宝生,陈家庆,刘振宇.牙轮钻头SEMS2单金属浮动密封结构的改进[J].石油机械,2010,38(8):5-7.
[6]张毅,常学平,付玉坤,等.钻井工况下单金属密封接触分析及实验研究[J].中国机械工程,2018,29(03):262-266.
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[9]李俊承,张方晓,张思才.基于响应面模型的刀口金属密封结构稳健设计[J].机械强度,2013,35(5):690-694.
[10]杨玉清.航空发动机用W形金属密封环密封性能分析与优化[D].长沙:湖南大学,2018.
[11]赵德胜.多约束条件下基于改进遗传算法的叶片优化排序[J].机械设计与制造,2010(9):12-14.
[12]卢美亮.单金属密封变形分析与结构优化[D].成都:西南石油大学,2017.
[2]杨启明,许明,黄志强.高速牙轮钻头轴承密封副结构分析[J].摩擦学学报,2002,22(4):483-486.
[3]Shunhe Xiong,Richard F Salant.A Dynamic Model of a Contacting Mechanical Seal for Down-Hole Tools[J].Journal of Tribology,Tanscations of ASME,2003,125:391-402.
[4]Shunhe Xiong,Richard F Salant.A Non-Axisymmetric Steady State Model of a Mechanical Seal for DownHole Tools[J].Journal of Tribology,Tanscations of ASME,2002,124:144-150.
[5]张宝生,陈家庆,刘振宇.牙轮钻头SEMS2单金属浮动密封结构的改进[J].石油机械,2010,38(8):5-7.
[6]张毅,常学平,付玉坤,等.钻井工况下单金属密封接触分析及实验研究[J].中国机械工程,2018,29(03):262-266.
[7]Zhang Yi,Zhang X,Chang X,et al.Wear morphology analysis and structural optimization of cone bit bearing seals[J].Industrial Lubrication&Tribology,2018,70(1):59-67.
[8]崔晓,董彦良,赵克定.基于ADINA的组合式动密封泄漏量与摩擦力计算[J].华南理工大学学报(自然科学版),2010,38(2):95-100.
[9]李俊承,张方晓,张思才.基于响应面模型的刀口金属密封结构稳健设计[J].机械强度,2013,35(5):690-694.
[10]杨玉清.航空发动机用W形金属密封环密封性能分析与优化[D].长沙:湖南大学,2018.
[11]赵德胜.多约束条件下基于改进遗传算法的叶片优化排序[J].机械设计与制造,2010(9):12-14.
[12]卢美亮.单金属密封变形分析与结构优化[D].成都:西南石油大学,2017.