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煤矿刮板输送机中板失效分析
Failure Analysis of Middle Plate of Scraper Conveyor in Coal Mine
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- DOI:
- 作者:
- 朱秀光 邱涵 穆润青 李杰 涂小慧 李卫
ZHU Xiuguang;QIU Han;MU Runqing;LI Jie;TU Xiaohui;LI Wei
- 作者单位:
- 中煤张家口煤矿机械有限责任公司 暨南大学先进耐磨蚀及功能材料研究院 暨南大学高性能金属耐磨材料技术国家地方联合工程研究中心
China Coal Zhangjiakou Coal Mining Machinery Co.,Ltd.,Zhangjiakou 076250,China;Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China;National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology,Jinan University,Guangzhou 510632,China
- 关键词:
- 刮板输送机 中板 磨料磨损 剥层磨损
scraper conveyor middle plate abrasive wear peeling wear
- 摘要:
- 利用扫描电子显微镜(SEM),X射线衍射仪(XRD),透射电子显微镜(TEM)和显微硬度计等表征手段,对国内某煤矿刮板输送机中板的失效行为进行分析研究。结果表明,中板连接处磨损最严重,其磨损失效的主要原因是链条、煤屑和矸石与中板之间相对滑动造成的显微切削;同时,磨损面亚表层组织纳米化造成的疲劳剥落也是导致中板连接处失效的重要因素。因此,在确保一定硬度的情况下,抑制形变层的形成是中板材料设计过程中需考虑的关键问题。
Scanning electron microscope(SEM),X-ray diffractometer(XRD),transmission electron microscope(TEM)and microhardness tester were used to analyze and study the failure behavior of the middle plate of scraper conveyor in a coal mine.The results show that the wear is the most serious at the joint of the plate,and the main reason for the wear failure is the micro-cutting caused by the relative sliding between the chain,coal scraps and gangue and the plate.At the same time,the fatigue spalling caused by the nanostructure of the subsurface of the wear surface is also an important factor leading to the failure of the middle plate joint.Therefore,under the condition of ensuring a certain hardness,the suppression of the formation of deformation layer is a key problem to be considered in the design process of medium plate materials.