油液污染颗粒引起的齿轮泵劣化失效研究  

Failure Analysis of Degradation Induced by Contaminant Particles in Gear Pump

作　　者：刘勇[1,2] 马彪[1] 张赛飞[3] 颜煜[4] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]中北大学机械与动力工程学院,太原030051 [3]伊利诺伊大学厄巴纳-香槟分校多相流研究中心,厄巴纳香槟61820 [4]中国人民解放军驻长沙军事代表室,长沙410014

出　　处：《农业机械学报》2015年第2期316-321,327,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国防科工局'十二五'传动基金资助项目(VTDP-3503);总装'十二五'预研资助项目(40402010104)

摘　　要：综合传动系统油液污染度较高,污染颗粒磨损极易引发齿轮泵流量劣化。基于齿轮泵流量劣化机理,从颗粒破碎的微观角度建立了端面间隙泄漏通道的污染颗粒破碎模型,确定了颗粒破碎常数与泄漏因子的取值。在此基础上推导齿轮泵流量劣化模型,建立了污染颗粒质量与磨损参数的线性关系,并分析了污染颗粒浓度、齿轮泵结构参数等影响因素。试验验证结果表明,齿轮泵流量劣化模型能较好地解释颗粒破碎、磨屑生成等污染磨损过程,并从理论角度提出齿轮泵污染耐受度的估算方法。该模型对于综合传动液压润滑系统设计与污染控制研究有重要的实用价值。The flow degradation of gear pump was induced by the contaminant particles entrained in the fluid within the power shift steering transmission （PSST）. On the basis of the degradation mechanisms of gear pumps, the mathematic model for the broken process of contaminants was proposed through the investigation of contaminants entrained into the leakage path in the clearance between the gear ends and the end plates. Within the model, both the values for the particle broken constant and the leakage rate were determined. Thereafter, the degradation model for gear pump was derived for the inference on the relationship of the contaminant mass with wear parameter. In addition, the effects of the contaminant level and the construction parameters were also analyzed. Results showed that the contaminant wear, including the process of particle broken and wear debris generation, can be well interpreted by the degradation model. Meanwhile, the prediction method of contaminant sensitivity for gear pumps was provided by the model, which was valuable and practical for the improvement of hydraulic and lubricatedsystem in PSST.

关 键 词：齿轮泵 液压 污染颗粒 劣化模型 

分 类 号：TH137.51[机械工程—机械制造及自动化]