采煤机扭矩轴的设计及载荷谱作用分析

Design and Load Spectrum Analysis of Torque Shaft of Shearer

对MG500/670-BD采煤机进行了扭矩轴设计,通过理论分析确定了扭矩轴的材料、外形尺寸及卸荷槽形式,最终设计了所需扭矩轴。模拟扭矩轴实际应用情况进行了载荷谱加载,结果表明,扭矩轴最小疲劳安全系数为3.43,最小静态安全系数为2.02,满足使用要求。在极限载荷作用下静态安全系数为1.01,为许用静态安全系数的0.84倍,且在U形槽处最大应力超出了材料的剪切应力,出现了破断现象。

Designed the torque shaft of the MG500/670-BD shearer.Through theoretical analysis,the material,external dimension and unloading groove type of the torque shaft were determined,and the required torque shaft was ultimately designed.The load spectrum was loaded by simulating the actual application of the torque shaft,and the results show that the minimum fatigue factor of safety of the torque shaft is 3.43,and the minimum static factor of safety is 2.02,which meets the use requirements.Under the action of ultimate load,the static factor of safety is 1.01,0.84 times the allowable static factor of safety.And the maximum stress at the U-shaped groove exceeded the shear stress of the material,resulting in fracture phenomenon.