摘要
为解决某型柴油机缸套压装过程中密封圈破损率较高的问题,采用失效模式与影响分析法找出造成密封圈破损的显著影响因子,通过试验并借助Minitab软件分析各影响因子对压装力的影响,提出工艺优化方案并进行试验和生产验证。结果表明:导致密封圈破损的高风险影响因子为密封圈装配温度、装配涂油位置、压装速度、缸套凹槽圆角半径、缸孔倒角和压装力;优化的缸套装配工艺为:缸孔倒角的测点为均布于倒角圆周的4个点,在密封圈和缸孔倒角两处涂抹润滑油,缸套凹槽圆角半径为0.25 mm,缸套压装速度为5 mm/s,密封圈装配温度为60℃;优化后的试验结果表明,缸套平均压装力为1.128 kN,与预测最优压装力接近,优化措施有效;实际生产结果表明,优化后工艺显著提高了缸套装配质量与生产效率。
To address the high failure rate of sealing rings during the press-fitting process of a certain diesel engine cylinder liner,the significant influencing factors causing sealing ring damage are identified through Failure Mode and Effects Analysis(FMEA).The effects of influencing factors on the press-fitting force are analyzed through experiments and with the help of Minitab software.A process optimization plan is proposed and tested for production validation.The results show that the high-risk influencing factors leading to sealing ring damage are the sealing ring assembly temperature,assembly oiling position,press-fitting speed,cylinder liner groove fillet radius,cylinder bore chamfer,and press-fitting force.The optimized cylinder liner assembly process is as follows:the measuring points for the cylinder bore chamfer are four points evenly distributed around the chamfer circumference,lubricating oil is applied to both the sealing ring and the cylinder bore chamfer,the cylinder liner groove fillet radius is 0.25 mm,the cylinder liner press-fitting speed is 5 mm/s,and the sealing ring assembly temperature is 60℃.The optimized experimental results show that the average press-fitting force of the cylinder liner is 1.128 kN,which closely matches the predicted optimal value,thereby confirming the effectiveness of the optimization measures.The actual production results show that the optimized process significantly improve the assembly quality and production efficiency of the cylinder liner.
作者
刘丁丁
王勇超
侯潇帅
栾玉庆
LIU Dingding;WANG Yongcha;HOU Xiaoshuai;LUAN Yuqing(State Key Laboratory of Engine and Powertrain system,Weifang 261061,China;Weichai Power Co.,Ltd.,Weifang 261061,China)
出处
《内燃机与动力装置》
2026年第1期86-92,共7页
Internal Combustion Engine & Powerplant
关键词
柴油机缸套
密封圈破损
压装工艺
工艺优化
diesel engine cylinder liner
sealing ring failure
press-fitting process
process optimization
