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笔者从流体力学的角度分析了煤矿井下排水泵扬程、电动机有效功率与排水管内壁粗糙(结垢)的关系,管内壁粗糙(结垢)对排水管路沿程阻力和局部阻力损失的影响。说明了煤矿井下现场使用中,由于管内壁附着积垢随着使用年限的增加而逐年增加,排水管路阻力增大,使得水泵排水效率降低、电动机功率增大,经过化学法清洗后,排水效率提高提高,节约了电能。
From the perspective of fluid mechanics, the author analyzes the relationship between the head of the drainage pump in the coal mine, the effective power of the motor and the roughness (scaling) of the inner wall of the drainage pipe, and the influence of the roughness (scaling) of the inner wall of the pipe on the resistance along the drainage path and the local resistance loss. It shows that in the underground coal mine, the deposition of scale on the inner wall of pipe increases year by year with the increase of service life, and the resistance of the drainage pipe increases. As a result, the drainage efficiency of the pump decreases and the power of the motor increases. After chemical cleaning, the drainage efficiency Improve and save energy.