摘要
针对MG400/920-WD型采煤机摇臂多次发生断齿问题,采用有限元法对该齿轮进行三维实体建模与齿根弯曲应力分析,分析结果表明齿轮齿根弯曲应力偏大是发生断齿事故的根源。综合互换性要求,在保证中心距不变的前提下,提出增大齿轮模数来改善齿根弯曲强度,对不同模数下的齿轮变位系数进行计算,三维实体建模与有限元分析。分析结果表明:齿根弯曲应力随着模数的增大而减小,当齿轮模数为10,齿根弯曲应力为295 MPa,可以满足强度要求。最后通过样机试验,对改进效果进行验证。
In view of broken teeth in the MG400/920-WD shearer cutting, the three-dimensional solid modeling and tooth root bending stress analysis of the gear are carried out by using the finite element method. The analysis results show that the tooth root bending stress was too large, which was the cause of tooth breakage. Considering the compatibility of installation, and ensuring the same center distance, it is proposed to increase the gear modulus to improve the root flexural strength, to calculate, model and finite element analysis of gear displacement coefficient under different modulus. The results show that the root bending stress decreases with the increase of modulus. When the gear modulus is 10, the gear root bending stress is 295 MPa, which can meet the strength requirements. Finally, the improvement effect is verified by exoeriment.
作者
原晔
YUAN Ye(Shanxi Tiandi Coal Machine Equipment Co.,Ltd.,Taiyuan 030006,China)
出处
《煤炭技术》
CAS
2018年第11期298-300,共3页
Coal Technology
关键词
采煤机
齿轮
强度校核
有限元法
shearer cutting
gear
strength checking
finite element method
