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在柴油机中,曲轴是将活塞的往复运动转变成圆周运动的主要零件,曲轴的损坏和磨损主要有以下形式: 1.正常磨损。发动机使用一定时间后,各运动部件都有不同程度的磨损,特别是曲轴主轴瓦、连杆轴瓦所承受的交变负荷比其他部位都大。目前,我国生产的曲轴多数为铸钢和锻钢材料(其他材料的曲轴采用的较少),同时对各轴颈都作了表面渗碳处理,使曲轴在一个大修期内磨损极小,而主要是主轴瓦、连杆轴瓦的磨损。一般第一次大修
In a diesel engine, a crankshaft is the main part that transforms the reciprocating motion of a piston into a circular motion. The damage and wear of the crankshaft mainly takes the following forms: 1. Normal wear and tear. Engine used a certain time, all moving parts have different degrees of wear and tear, especially the crankshaft main bearing, connecting rod bearings are subject to greater alternating load than other parts. At present, most crankshafts produced in our country are cast steel and forged steel (other materials use less crankshafts), and at the same time carburizing the surfaces of the journals, the crankshafts wear extremely little in an overhaul period, while Mainly the main bearing, connecting rod bearing wear. General first overhaul