浅析MG750/1920-WD采煤机破碎机故障及解决方案

Analysis of Failure of MG750/1920-WD Shearer Crusher and Its Solutions

摘要: 神华宁煤集团宁东矿区主采煤层厚度在3.8~4.5米，倾角 < 16˚，工作面配套MG750/1920-WD型采煤机，为提高生产效率，采用双向割煤生产工艺，但是实际生产过程中采煤机破碎机破碎大块煤能力差、故障率较高，双向割煤效果差，制约工作面的产能发挥，本文以MG750/1920-WD型采煤机为例，主要介绍采煤机破碎机在使用过程中普遍发生的密封漏油、堵转烧电机、结构件和护罩损坏等故障问题，由于上述问题致使双向割煤时破碎大块煤能力低，由于大块煤堆积导致采煤机牵引速度慢、生产效率低，通过重新选用密封、电动机、结构件整体调质的材料，达到提高密封性能、电机功率、破碎机架强度，实现工作面采煤机正常双向割煤，提高工效的目的。

Abstract: The coal seam thickness of the main mining coal seam in the Ningdong mining area of Shenhua Ningxia coal group is 3.8~4.5 meters, the dip angle is less than 16, and the working face is matched with the MG750/1920-WD coal shearer. In order to improve the production efficiency, the two-way coal cutting process is adopted. However, in the actual production process, the coal shearer crusher has a bad crushing capacity and high failure rate, and the two-way coal cutting effect is poor, limiting the productivity of the working face. Taking the MG750/1920-WD shearer as an example, this paper mainly introduces the problems of sealing oil leakage, blocking the burning motor, the structural parts and the damage of the shield during the use of the shearer crusher. Because of the above problems, the ability of crushing large lump coal is low when the coal is cut in two directions. Due to the accumulation of large lump coal, the haulage speed of the shearer is slow and the production efficiency is low. By improving the material of sealing, motor and structural parts, the sealing performance, motor power and crushing frame strength can be improved, in order to achieve the purpose of cutting coal face and improving work efficiency.