1.School of Mechanical Engineering, Liaoning Technical University, Fuxin , China;2.China National Coal Mining Equipment Corporation Limited, Beijing , China

针对采煤机截齿在割煤过程中,截齿由于受到大的压应力、剪切力和动载荷,无法实现采煤机高效割煤等问题,提出了一种基于应变传感器的采煤机截齿受力检测方法。该方法是通过截齿粘贴应变片的方式对采煤机割煤过程中截齿受力进行实时检测,实时显示截齿受力变化曲线,试验结果表明:在采煤机割煤时截齿受力变化曲线能够真实反应截齿受力,所选截齿1-1 X向力最大值为0.70 k N;Y向力最大值为1.72 k N;Z向力最大值为4.16 k N;截齿1力矩0.59 k N·m。考虑误差和相关随机因素的影响,试验结果接近相关理论计算值,能够实现截齿受力检测。该研究可对采煤机截齿磨损程度及失效状态能够实现预判断,及时发现和更换失效截齿、提高采煤机截割头的工作效率和使用寿命。

During the coal cutting process of the cutters on the coal shearer, due to the high compressed stress, shearing force and dynamic load, the cutter could not realize a high efficient coal cutting and others of the coal shearer. A stress detection method of the cutter on the coal shearer was provided based on the strain sensor. The detection method was to conduct the real time detection on the cutter stress during the coal cutting process of the coal shearer with a method to stick the strain gauges on the cutters and a stress variation curve of the cutter could be real timely displayed. The test results showed that during the coal cutting period of the coal shearer, the stressed variation curve of the cutter could actually reflect the cutter stressed and the max X directional force of the cutter 1-1 selected would be about 0.70 kN. The max Y directional force value would be 1.72 kN. The max Z directional force value would be 4.16 kN and the torque of the cutter 1 would be 0.59 kN·m. In consideration of the influences of the error and related random factors, the test results closed to the related theoretical calculation value could realize the stress detection of the cutter. The study could realize the pre-judgement on the wear degree and the failure status of the cutter on the coal shearer, could timely found and replace the failure cutter and would have the important significances to improve the work efficiency and service life of the cutting head on the coal shearer.

辽宁省教育厅基金资助项目(16-1105)；