正弦微沟槽织构对柱塞密封副摩擦学性能的影响  

Influence of Sine Micro Groove Texture on the Tribological Performance of Plunger Seal Pair

作　　者：杜文鑫 何霞[1] 陈文斌[2] 王国荣[1] 钟林[1] DU Wen-xin;HE Xia;CHEN Wen-bin;WANG Guo-rong;ZHONG Lin(School of Mechanical Engineering,Southwest Petroleum University,Chengdu 610599,China;CNPC Chuanqing Drilling Engineering Company Limited,Chengdu 610051,China)

机构地区：[1]西南石油大学机电工程学院,成都610599 [2]川庆钻探工程有限公司,成都610051

出　　处：《表面技术》2021年第7期225-232,共8页Surface Technology

基　　金：国家自然科学基金面上项目(51775463)。

摘　　要：目的研究不同工况下正弦沟槽织构对柱塞密封副摩擦性能的影响,以降低压裂泵柱塞密封副的摩擦磨损。方法基于压裂泵柱塞密封副几何模型和流体润滑理论,建立了正弦微沟槽织构化柱塞-橡胶密封副动压润滑数值理论模型,通过仿真模拟研究了不同柱塞密封压力、运动速度对正弦织构减磨性能的影响。结果不同密封压力下,从40 MPa增至140 MPa时,织构化柱塞表面的油膜承载力及其增长率都不断增大,摩擦系数增大,增长率减小,且柱塞运动速度越高,油膜承载力及摩擦系数越大。不同柱塞运动速度下,油膜承载力和柱塞速度成线性增长关系,摩擦系数不断增大,增长率则呈现减小趋势。针对常用的压裂泵工况,柱塞运动速度和密封压力为错峰配合。根据仿真结果可以看出,在柱塞运动速度-密封压力为150冲次/min-80 MPa工况下,油膜承载力最大,摩擦系数最小,而300冲次/min-40 MPa工况下的油膜承载力最小,摩擦系数系数最大。结论正弦沟槽织构能够有效改善柱塞密封副的动压润滑性能,在文中的正弦沟槽织构参数下,随着柱塞密封压力、运动速度的上升,油膜承载力和摩擦系数均呈现增长趋势。The purpose of this paper is to reduce the friction and wear of the plunger sealing pair of the fracturing pump,and study the influence of the sine groove texture on the friction performance of the plunger sealing pair under different working conditions.Based on the geometric model of the plunger sealing pair of the fracturing pump and the fluid lubrication theory,a numerical theoretical model of the sine micro-groove textured plunger-rubber sealing pair is established to study the effect of different plunger sealing pressures and stroke times on the anti-wear performance of sine texture through simulation.Under different sealing pressure,from 40 MPa to 140 MPa,the oil film bearing capacity and its growth rate of textured plunger surface increase,the friction coefficient increases and the growth rate decreases,and the higher the plunger stroke,the greater the oil film bearing capacity and friction coefficient;under different plunger stroke(speed),the oil film bearing capacity and plunger speed have a linear relationship,the friction coefficient increases and the growth rate decreases;according to the simulation results,it can be seen that the oil film bearing capacity is the largest and the friction coefficient is the minimum under the condition of plunger stroke sealing pressure 150/min-80 MPa,while the oil film bearing capacity and friction coefficient are the minimum under the condition of 300/min-40 MPa.The sine groove texture can effectively improve the dynamic pressure lubrication performance of the plunger seal pair.Under the sine groove texture parameters of this article,with the increase of the plunger seal pressure and stroke rate,the oil film bearing capacity and friction coefficient both show an increase trend.

关 键 词：压裂泵 柱塞密封副 正弦沟槽 表面织构 润滑减磨 

分 类 号：TH133[机械工程—机械制造及自动化] TH117