液压阀污染磨损失效研究及影响因素分析  

Study on the Contamination Wear Failure of Hydraulic Valve and the Influencing Factors

作　　者：葛鹏飞[1] 郑长松[1] 马彪[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《兵工学报》2014年第3期298-304,共7页Acta Armamentarii

基　　金：国防科工局"十二五"传动专项基金项目(VTDP-3503)

摘　　要：液压阀的污染磨损失效是履带车辆常见故障之一。从微观角度对液压阀的污染磨损过程进行了分析,运用三体磨损理论和油液分析理论建立了液压阀污染磨损过程模型。通过实例对所建模型进行验证,并对液压阀污染磨损的影响因素进行了分析。研究结果表明:所建模型与实际情况比较吻合;阀芯阀体硬度越接近、运动副接触长度越小、阀芯直径越小,则液压阀污染磨损寿命越长;油液污染度越大、大颗粒所占比例越多、工作油压越高、工作温度越高,则液压阀污染磨损寿命越短。The contamination wear failure of hydraulic valve is one of the common faults of tracked vehi- cle. The contamination wear process of hydraulic valve is analyzed from a micro point of view. A model of contamination wear process is established using the theory of three-body abrasion and oil analysis, and then the model is verified by an example. At last, the influencing factors of the hydraulic valve contami- nation wear are analyzed. Results show that the model is reliable. A lower hardness difference between the spool and the body, a shorter spool contact length and a smaller spool diameter lead to a longer con- tamination wear life ; a higher oil contamination level, a larger proportion of big particles, a higher oper- ating pressure and a higher operating temperature cause a shorter contamination life.

关 键 词：机械学 液压阀 污染磨损 影响因素 

分 类 号：TH137.52[机械工程—机械制造及自动化]