采煤机行走轮轮齿与销齿啮合的接触强度研究  

Study on the Contact Strength between the Teeth of the Traveling Wheel and the Pin Teeth of the Shearer

作　　者：陈彪 Chen Biao(Xinliangyou Coal Industry Co.,Ltd.,Linfen Shanxi 041200)

机构地区：[1]山西潞安集团蒲县新良友煤业有限公司,山西临汾041200

出　　处：《机械管理开发》2020年第8期100-102,共3页Mechanical Management and Development

摘　　要：针对采煤机行走轮、销排啮合出现的轮齿断裂的问题,提出采用有限元方法对轮齿、销齿啮合处的接触应力进行研究。以某型采煤机为例,通过选用行走轮中一个轮齿、销齿的啮合作为研究对象,开展了行走轮及销排的结构性能研究。研究结果表明:轮齿啮合处应力小于材料屈服强度,满足静强度要求,但由于制造加工过程中存在表面微裂纹及表面磨损,裂纹或磨损尖端在接触应力的往复作用下,产生塑性区,并积累塑性变形最终形成裂纹萌生、扩展直至断裂的现象。分析结果与实际情况一致,说明了分析方法的可适用性,该方法可以为行走轮等类似产品的设计研发提供理论指导。In view of the problem of tooth fracture in the engagement of traveling wheel and pin row of shearer,the finite element method is proposed to study the contact stress at the engagement of tooth and pin row.Taking a shearer as an example,this paper studies the structure and performance of the walking wheel and pin row by selecting the meshing of one of the teeth and pin teeth as the research object.The results show that the stress at the meshing of gear teeth is less than the yield strength of material,which meets the requirements of static strength.However,due to the existence of micro cracks on the surface and wear on the surface during the manufacturing process,under the reciprocating action of contact stress,the cracks or wear tips produce plastic zones,and accumulated plastic deformation eventually forms the phenomenon of crack initiation,propagation and fracture.The analysis results are consistent with the actual situation,which shows the applicability of the analysis method.This method can provide theoretical guidance for the design and development of similar products,such as walking wheels.

关 键 词：采煤机 行走轮 轮齿折断 疲劳 

分 类 号：TD421.61[矿业工程—矿山机电]