摘要
乳化液泵作为煤矿井下综采工作面液压支架系统的核心动力源,其配流副在高频交变载荷和高水基介质工况下易引发摩擦磨损、液压冲击及振动噪声等问题,导致泵体泄漏增加,容积效率显著下降。为提高配流副润滑性能,采用试验及仿真手段,利用多功能摩擦磨损试验机测试并分析不同配对材料(304不锈钢/316L不锈钢、304不锈钢/SAF2507双相不锈钢)的摩擦磨损特性,探究材料对配流盘润滑性能的改善作用;通过优化配流盘三角阻尼槽结构,分析阻尼槽位置、长度、深度角及宽度角对泵输出特性的影响。结果表明:在高水基润滑工况下,304不锈钢与SAF2507双相不锈钢配对时表现出更优的减摩抗磨性能,在100 N载荷下,其平均摩擦因数较304不锈钢/316L不锈钢降低17.38%,磨损量降低47.21%,磨损表面磨痕更浅、更均匀,未出现明显犁沟,表现出良好的油膜形成能力与表面稳定性;通过优化配流盘阻尼槽的结构参数(位置选择吸/排液过渡区2号和4号位置、长度为10 mm、深度角为12°、宽度角为70°),可将流量脉动率降至12.861%,从而有效减缓配流过程中因脉动引发的液压冲击,提高配流副油膜分布的均匀性,改善配流副润滑性能。研究为高水基液压元件的可靠性设计提供了实践依据。
The emulsion pump serves as the core power source for the hydraulic support system in fully mechanized mining faces within coal mines,its distribution assembly is prone to issues such as friction wear,hydraulic shock,and vibration noise under high-frequency alternating loads and high-water-based medium operating conditions,resulting in increased leakage from the pump body.To enhance the lubrication performance of the distribution and flow assembly,experimental and simulation methods were employed.Combined with testing and analysis on a multifunctional friction and wear testing machine,the friction and wear characteristics of different material pairings(304 stainless steel/316L stainless steel,304 stainless steel/SAF2507 duplex stainless steel)were evaluated,investigating the improvement of lubrication performance in distributor plates through material selection.By optimizing the triangular damping groove structure of the flow distribution manifold,the effects of damping slot position,length,depth angle,and width angle on pump output characteristics were analyzed.The results indicate that under high water-base lubrication conditions,the 304 stainless steel exhibits superior anti-friction and wear resistance properties when paired with SAF2507 duplex stainless steel.Under a 100 N load,its average coefficient of friction is 17.38% lower than that of 304 stainless steel/316L stainless steel,wear reduction of 47.21%,with shallower and more uniform wear marks on the surface,no significant plow furrows are observed,demonstrating excellent oil film formation capability and surface stability.The structural parameters of the distributor plate damping groove are optimized(selecting positions 2 and 4 in the suction/discharge transition zone,the length of 10 mm,depth angle of 12°,width angle of 70°),the flow pulsation rate can be reduced to 12.861%,hydraulic shock caused by pulsation during flow distribution is effectively mitigated,the uniformity of the distribution of the secondary oil film in the distribution system is improved,the lubricating performance of the distribution valve is enhanced.This study provides practical guidance for the reliability design of high water-base hydraulic components.
作者
冯淼
廉自生
FENG Miao;LIAN Zisheng(College of Mechanical Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;Shanxi Key Laboratory of Fully Mechanized Coal Mining Equipment,Taiyuan Shanxi 030024,China)
出处
《机床与液压》
北大核心
2026年第5期163-171,共9页
Machine Tool & Hydraulics
关键词
乳化液泵
配流副
润滑性能
摩擦磨损
结构优化
emulsion pump
valve plate pair
lubrication performance
frictional wear
structural optimization
