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单辊破碎机是烧结终端成品破碎的重要工艺设备,是与烧结主机系统配套的主要装备之一。它的工作条件是高温、低速(齿辊转速4.32～5.81r/min,重载荷。破碎机齿辊支承是ZG25瓦座、ZQSn8—21锡青铜系轴瓦结构,润滑形式为干油润滑,由炉前自动干油站通过输油管道定时压注润滑油脂。由于单辊破碎机位于烧结机尾部、是干油站最远的润滑点,且油管串联于主机弹性滑道等诸多润滑点、到位油压已是强弩之末,加之油管长期经受高温烘烤、油脂易干燥结块,供油不畅或断油现象时有发生。同时齿辊转速慢、负荷重、难以在轴瓦工作表面形成油膜,诸多因素的共同影响,轴瓦润滑状况恶劣。因此单辊破碎机由于轴瓦引发的设备事故频繁,以我厂两台18M~2烧结机单辊破碎为例:1990年发生轴瓦事故18起,故障停机55.58台时,更换铜瓦9次,消耗铜瓦19件(其中上瓦8件、下瓦11件),仅备件费用即达1.5万元。
Single roller crusher is an important technological equipment for crushing the final product of sintering, which is one of the major equipments matching the sintering host system. Its operating conditions are high temperature, low speed (gear speed 4.32 ~ 5.81r / min, heavy load. Crusher gear roller bearing is ZG25 watt seat, ZQSn8-21 tin bronze bearing structure, lubrication form is dry oil lubrication, Before the automatic dry-oil station through the pipeline regularly pressure injection lubricating grease.Because the single roller crusher is located at the tail of the sintering machine, it is the furthest lubrication point of the dry oil station, and the oil pipe is connected in series with lubrication points such as the host elastic slide, Has been a spent force, coupled with long-term oil tubing bake, easy to dry caking oil, poor oil supply or off the oil from time to time there are slow gear, heavy load, it is difficult to form a film on the bearing surface of the work, a lot of factors Common impact, poor lubrication of bushings.So single roller crusher due to frequent accidents caused by bushings, with our two 18M ~ 2 sintering machine single roller crushing as an example: in 1990 occurred 18 bearing accidents, downtime 55.58 Taiwan , 9 replacement copper tiles, consumption of 19 copper tiles (including 8 on the tile, 11 on the tile), only the cost of spare parts is up to 15,000 yuan.