如何判断分析进口柴油发动机烧瓦的主要原因?
How to judge the analysis of the main reasons the tile burning imported diesel engine?
一般情况下,柴油机烧瓦时会出现冒白烟现象。轴瓦烧蚀以后,柴油机运转会发出金属撞击异响声.严重时,曲轴与轴瓦烧蚀抱死在一起而无法转动。
In general, diesel engines burning kwh will appear white smoke phenomenon. Bearing ablation, the diesel engine will sound of metal striking noise. When serious, but not the crankshaft and bearing ablation locked together.
曲轴烧蚀的主要原因如下:
The following main reasons crankshaft ablation:
(1)机油容量不足。柴油机正常工作机油容量,应按机油标尺刻线规定随时检查添加,若机油容量较少,机油吸油盘吸收容量将受到影响,从而影响柴油机机油的供应。
(1) the oil capacity. The normal work of the diesel engine oil capacity, according to the provisions of the engine oil dipstick reticle inspection add, if less oil capacity, oil suction disc absorption capacity will be affected, thus affecting the diesel engine oil supply.
(2)机油压力较低。柴油机正常工作机油压力为294kPa--588kPa,当机油压力略低于294kPa(不低于245kPa)时,只要柴油机机油容量在规定上限(机油标尺上刻线),由于机油飞溅效果好,柴油机尚能维持正常工作,反之,若机油压力低于294kPa,机油容量处于规定下限,则柴油机极易出现烧瓦。
(2) the oil pressure low. The oil pressure of the normal work of the diesel engine is 294kPa--588kPa, when the oil pressure is slightly lower than 294kPa (less than 245kPa), as long as the diesel oil capacity in the limit (oil ruler line), because the oil splash effect is good, the diesel engine can still maintain the normal work, on the contrary, if the oil pressure is lower than 294kPa, the oil capacity is lower limit diesel engine, is easy to appear the tile burning.
(3)轴瓦与轴颈配合间隙过大或过小。间隙过大(超过极限值):故障一般发生在新机或大修后柴油机投人使用时间较长。机油压力腔不能形成,机油压力降低。间隙过小:故障常发生在新机或大修后柴油机。
(3) bearing and shaft neck with the gap is too large or too small. The gap is too large (more than the limit value): failure generally occurs investment in new machine or after overhaul diesel engine used for a long time. The oil pressure cavity can not be formed, the oil pressure is reduced. Gap is too small: in the new machine or after the overhaul of diesel engine faults occurred.
(4)曲轴轴颈或气缸体主轴承孔,几何尺寸或形状尺寸超差和曲轴连杆轴颈夹角分度不匀。都会使曲轴轴颈与轴瓦配合间隙较小,润滑油膜难以形成。
(4) the crankshaft journal or a cylinder block main bearing hole, geometric size or shape difference between size and neck of crankshaft angle dividing unevenness. Will make the crankshaft journal and bearing clearance is small, it is difficult to form a lubricating oil film.