摘要
高压轴向柱塞泵滑靴副在油润滑条件下工作,零件的表面结构对接触面油膜性能有重要影响。选择锥形、圆柱形、方形3种不同形貌微坑开设于滑靴底部,探讨在高速高压工况下,当滑靴表面微坑形貌参数改变时,油膜承载能力及温升的变化规律。基于滑靴副静压润滑原理,利用有限元分析方法,研究在相同工况下,微坑形貌、面积率及深径比对35 MPa高压轴向柱塞泵滑靴副油膜压力与温度变化的影响。结果表明:锥形截面油膜承载能力最佳,在一定范围内,接触面平均压力随深径比的增加明显增大;方形表面在面积率小、深径比大时具有最小温升;合理倾斜微坑底面,优化表面形状,选择较大的深径比,能获得良好的油膜性能。
High-pressure axial piston pump works under the condition of oil lubrication,the surface structure of the part has an important effect on the performance of oil film between the contact surfaces.Three different surface micro-pits,conical,cylindrical and square micro pits,were machined at the bottom of the sliding shoe,and the change law of the carry capacity of oil film and the temperature rise was investigated when the parameters of surface micro-pit on the sliding shoe vary.Based on the hydrostatic lubrication technique of slipper pair,the finite element analysis method was used to study the influence of different micro-pit texture,area rate,and depth-diameter ratio to the pressure and temperature changes of oil film of the slipper pair for 35 MPa high pressure axial piston pump under the same working condition.The results show that the conical section at the bottom of the sliding shoe provides the best carrying capacity of oil film. The average interface pressure is increased evidently with the increase of the depth ratio within a certain range.Square surface has the minimum temperature rise under low area rate and high depth-diameter ratio.Excellent oil film performance can be acquired if inclining the underside of micro-pit,optimizing the surface shape and choosing the larger depth-diameter ratio.
作者
倪斯亮
吴怀超
赵丽梅
杨绿
NI Siliang;WU Huaichao;ZHAO Limei;YANG Lv(School of Mechanical Engineering,Guizhou University,Guiyang Guizhou 550025,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2018年第6期30-34,42,共6页
Lubrication Engineering
基金
国家重点基础研究发展计划(973计划)项目(2014CB046404)
贵州省高层次创新型人才培养计划项目(黔科合平台人才【2016】5659)
关键词
表面微坑
轴向柱塞泵
滑靴副
油膜性能
surface micro-pit
axial piston pump
slipper pair
oil film performance
