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压裂泵滑动轴承流体动压润滑性能研究 被引量:1

Study on Hydrodynamic Lubrication Performance of Sliding Bearing of Fracturing Pump
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摘要 压裂泵的十字头滑履与导板间隙、供油流量和油压等关键参数,目前主要通过工程经验进行调节,缺乏科学依据,易致导板磨损和烧瓦,严重影响压裂泵服役寿命。针对以上问题,建立3500HP压裂泵的轴瓦、轴承间隙及润滑油组成的流体力学系统,利用计算流体力学软件Fluent进行滑动轴承的流场分析,考察润滑油黏度、轴瓦间隙、润滑流量、润滑油压对压裂泵用滑动轴承的影响。结果表明:随着滑履与导板间隙的减小,导板的形变与应力会增大,最优导板间隙为0.5 mm左右;增大供油流量会使导板的形变与应力降低,供油流量最好不低于2.2 L/min;增大供油黏度会使导板的形变与应力变大,在0.2~0.4 Pa·s范围内供油黏度越小越好;随着供油油压的增大,导板的形变与应力增加显著,当油压大于4 MPa时,导板的应变与应力呈现指数级增大,当供油油压为3 MPa时,导板的形变与应力达到最小值。 The key parameters such as the clearance between crosshead sliding shoe and guide plate,oil supply flow and oil pressure of fracturing pump are mainly adjusted through engineering experience,lacking scientific basis,it is easy to cause guide plate wear and tile burning,seriously affecting the service life of fracturing pump.In view of the above problems,a hydrodynamic system composed of bearing bush,bearing clearance and lubricating oil of a 3500HP fracturing pump was established.Computational fluid dynamics software Fluent was used to analyze the flow field of sliding bearings,and the effects of lubricating oil viscosity,bearing clearance,lubricating oil quantity and lubricating oil pressure on the sliding bearings of the fracturing pumps were investigated.The results show that the deformation and stress of the guide plate will increase with the decrease of the clearance between the sliding shoe and the guide plate,and the optimal clearance of the guide plate is about 0.5 mm.Increasing the oil supply flow will reduce the deformation and stress of the guide plate,and the oil supply flow should not be less than 2.2 L/min.Increasing the oil supply viscosity will increase the deformation and stress of the guide plate,and the smaller the oil supply viscosity within the range of 0.2 Pa·s to 0.4 Pa·s,the better.With the increase of oil supply pressure,the deformation and stress of the guide plate increase significantly.When the oil pressure is greater than 4 MPa,the strain and stress of the guide plate increase exponentially.When the oil supply pressure is 3 MPa,the deformation and stress of the guide plate reach the minimum value.
作者 王安帅 于学会 曾兴昌 周小明 杨雷宇 WANG Anshuai;YU Xuehui;ZENG Xingchang;ZHOU Xiaoming;YANG Leiyu(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China;National Oil and Gas Drilling Equipment Engineering Technology Research Center,Baoji Shaanxi 721000,China)
出处 《润滑与密封》 CAS CSCD 北大核心 2023年第5期16-22,共7页 Lubrication Engineering
基金 国家油气钻井装备工程技术研究中心开放基金项目(BOMCO-J118-JKY001-2021)。
关键词 压裂泵 滑动轴承 间隙 流场分析 流体动压润滑 fracturing pump sliding bearing gap flow field analysis hydrodynamic lubrication
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