相关截割参数对联合截割部受力影响的试验研究

Test study on influence of correlative cutting parameters on combined cutting unit

为了改善采煤机-水射流联合截割系统的联合截割部在截割坚硬煤岩时的受力状况,有必要对影响其受力状况的部分相关截割参数进行研究。利用自行设计的单截齿-喷嘴联合截割试验台,对影响联合截割部受力的3个相关截割参数(切削厚度、截齿截割速度和截齿冲击角)进行了试验研究和分析。正交试验结果表明,在这3个参数中,切削厚度是影响联合截割部受力的最大因素,其次是截齿截割速度,而截齿冲击角对于正交试验结果的影响最小。因此,改善联合截割部的受力状况应首先考虑减少截割坚硬煤岩时的切削厚度,并降低截齿截割速度。

In order to improve the force status of combined cutting unit of the shearer and water jet combined cutting system during cutting hard coal rock, it was necessary to study partial correlative cutting parameters affecting its ibrce status. In the paper, the single-pick and nozzle combined cutting test bed was built to conduct the test study on three correlative cutting parameters such as cutting thickness, pick cutting velocity and impact angle. The orthogonal test results showed that cutting thickness was the dominative factor affecting the force status of the combined cutting unit, pick cutting velocity was the second and the impact angle was the third. So, decrease in the cutting thickness should be considered first so as to improve the force status of the combined cutting unit, and the pick cutting velocity should be reduced too.