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大连机车车辆厂早期设计和生产的16V240ZJB型柴油机主轴承和连杆大端轴承是依据动力计算求得最大轴承负荷、比压和线速度等，结果在实际运用中曾出现过许多失效事故。由于油膜润滑理论的进一步完善和电子计算机的普遍应用，而对16V240ZJB型柴油机的上述轴承进行了不同进油温度、进油压力、曲轴平衡重、负荷和转速等多种方案的轴心轨迹计算和分析，并依据计算结果对曲轴和轴承进行了相应改进，从中得出一些有益的经验，从而在防止轴承失效，避免曲轴烧损、断裂等恶性事故方面，收到明显的经济效益和社会效益。文中给出了某些计算分析结果，并提出了关键计算数据的判定标准，对其它类似柴油机的轴承改进也有普遍意义。
The early design and production of 16V240ZJB diesel engine main bearing and connecting rod big end bearing of Dalian Locomotive & Rolling Stock Plant was based on the dynamic calculation to get the maximum bearing load, specific pressure and linear speed. As a result, many failure accidents occurred in practical application. Due to the further improvement of oil film lubrication theory and the universal application of electronic computer, the axial locus calculation and calculation of various schemes of 16V240ZJB diesel engine with different inlet oil temperature, inlet oil pressure, crankshaft counterweight, load and speed Based on the calculation results, the crankshaft and the bearing are improved accordingly. Some useful experiences are derived from the analysis, and obvious economic and social benefits have been achieved in preventing the bearing failure, avoiding the crankshaft burning and cracking and other serious accidents. Some calculation and analysis results are given in this paper, and the judgment criteria of key calculation data are put forward. It is also of general significance to other similar diesel engine bearings.