如何判斷分析進口柴油發動機燒瓦的主要原因?
How to judge the analysis of the main reasons the tile burning imported diesel engine?
一般情況下,柴油機燒瓦時會出現冒白煙現象。軸瓦燒蝕以后,柴油機運轉會發出金屬撞擊異響聲.嚴重時,曲軸與軸瓦燒蝕抱死在一起而無法轉動。
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.
曲軸燒蝕的主要原因如下:
The following main reasons crankshaft ablation:
(1)機油容量不足。柴油機正常工作機油容量,應按機油標尺刻線規定隨時檢查添加,若機油容量較少,機油吸油盤吸收容量將受到影響,從而影響柴油機機油的供應。
(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)機油壓力較低。柴油機正常工作機油壓力為294kPa--588kPa,當機油壓力略低于294kPa(不低于245kPa)時,只要柴油機機油容量在規定上限(機油標尺上刻線),由于機油飛濺效果好,柴油機尚能維持正常工作,反之,若機油壓力低于294kPa,機油容量處于規定下限,則柴油機極易出現燒瓦。
(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)軸瓦與軸頸配合間隙過大或過小。間隙過大(超過極限值):故障一般發生在新機或大修后柴油機投人使用時間較長。機油壓力腔不能形成,機油壓力降低。間隙過小:故障常發生在新機或大修后柴油機。
(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)曲軸軸頸或氣缸體主軸承孔,幾何尺寸或形狀尺寸超差和曲軸連桿軸頸夾角分度不勻。都會使曲軸軸頸與軸瓦配合間隙較小,潤滑油膜難以形成。
(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.