CST液黏传动摩擦副表面织构技术研究  

Research of Surface Texture Technique Used on CST Hydro-Viscous Drive Friction Pair

作　　者：孙少妮[1] 谢里阳[1] 龙日升 SUN Shao-ni;XIE Li-yang;LONG Ri-sheng(School of Mechanical Engineering and Automation,Northeastern University,Liaoning Shenyang 110819,China;Shanxi Key Laboratory of Fully Mechanized Coal Mining Equipment,Shanxi Taiyuan 100013,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]煤矿综采装备山西省重点实验室,山西太原100013

出　　处：《机械设计与制造》2018年第12期117-120,共4页Machinery Design & Manufacture

基　　金：煤矿综采装备山西省重点实验室开放课题项目

摘　　要：可控起动传动装置(Controlled Start Transmission, CST)为重型刮板输送机提供了一种软起动、过载保护和多机功率平衡的可靠方法。液黏摩擦传动单元(Hydro-viscous Drive Unit,HDU)是CST装置的核心,它包括多组摩擦副。摩擦副的可靠性和耐磨性能直接决定了CST装置的整体性能。以粉末冶金和激光表面工程技术为基础,提出以仿生非光滑表面来改善和提高摩擦副机械耐磨性能的新思路。利用激光直接沉积和激光脉冲钻孔技术,制备了具有不同非光滑表面形态和参数的非光滑表面试样。通过表面形貌分析和摩擦磨损试验发现:激光直接沉积过程的基板预热(600℃),有助于提高激光沉积试样的表面质量,包括表面形貌、裂纹抑制控制以及沉积材料与基板结合位置的晶粒细化等;与光滑试样相比,具有非光滑表面形态的试样具有更好的耐磨性能,在试验条件下,当小孔间距等于1 mm,小孔直径等于0.8 mm时,材料表面具有最好的耐磨性能。该研究为CST装置液黏传动摩擦副的未来研究和试制提供了新的方法。The Controlled Start Transmission （CST） equipment provides a feasible way to realize the soft starting, overload protection, and multi-driver power-balance of scraper conveyors. The Hydro-viscous Drive Unit（HDU）, which consists of multiple sets of friction pairs, is the core component of CST. The wear resistance and reliability of friction pairs is the decisive factor for the performance. In order to replace the current imported paper-based friction pair of CST, based on powder metallurgy and laser surface engineering technology, the biomimetic non-smooth surface was proposed to improve the mechanical wear resistance of friction pair. By means of laser direct deposition and laser pulsed drilling, the non-smooth surface samples with different surface structures were prepared. By surface morphology analysis and friction ＆ wear testing, the results show that： When substrate is preheated to 600℃, it is helpful to improve the surface quality of laser deposition samples, including surface morphology, crack control as well as grain refinement of binding sites between deposited material and substrate; the wear resistant performances of biomimetic non-smooth samples are better than that of smooth ones; the wear resistant performance is the best when pits-distance equals 1mm, pit-diameter equals 0.8mm. This research will provide a basis for the future optimal design of HDU of CST.

关 键 词：液黏传动 表面织构 耐磨性能 激光直接沉积技术 

分 类 号：TH16[机械工程—机械制造及自动化] TH117.1