At home and abroad a large number of experiments show that keep the frame, ring, steel ball processing quality of bearing vibration with different degree of influence, one of the steel ball processing quality had evident effects on bearing vibration, the second is the ring of the processing quality, is the most important factors affecting…

Coal, as a kind of non-renewable resources, and also is a kind of important energy, but also be used in metallurgical, chemical, cement, electricity, heating, heating, boiler industries as high quality fuel.Large coal-fired power plants are still is given priority to with pulverized coal fired boiler, in recent years along with our country coal resources…