孙稀玙,付艳,高礼宁,等.船用柴油机全浮式活塞销摩擦副型线优化设计[J].内燃机工程,2025,46(4):1-9.
船用柴油机全浮式活塞销摩擦副型线优化设计
Profile Optimization of Floating Piston Pin Friction Pairs of a Marine Diesel Engine
DOI：10.13949/j.cnki.nrjgc.2025.04.001
关键词:全浮式活塞销  摩擦副  型线优化  磨损
Key Words:full-floating piston pin  friction pair  profile optimization  wear
基金项目:
作者单位E-mail
孙稀玙* 上海交通大学 新能源动力研究所，上海 200240 929431121@sjtu.edu.cn 
付艳 上海交通大学 新能源动力研究所，上海 200240 fuyan512@sjtu.edu.cn 
高礼宁 上海交通大学 新能源动力研究所，上海 200240 easoning@sjtu.edu.cn 
巫立民 中国船舶集团有限公司第七一一研究所，上海 201108 wulimin@csic711.com 
张萌 上海交通大学 新能源动力研究所，上海 200240 m_zhang@sjtu.edu.cn 
崔毅* 上海交通大学 新能源动力研究所，上海 200240
高新船舶与深海开发装备协同创新中心，上海 200240 		ycui@sjtu.edu.cn 
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摘要:为降低某型船用大功率柴油机全浮式活塞销摩擦副的磨损，提出了一种分段处曲率连续的多项式型线表达方法，对销孔型线进行了优化设计。首先根据热机耦合活塞销摩擦副整体接触模型，建立销–销孔接触区域子模型用于销孔型面优化，可将计算效率提高120倍。然后在该整体接触模型基础上设计高次曲线替代原锥形型线，采用子模型和Python驱动的型面自动设计方法优化了销孔型线，使销孔处最大应力降低12.7%。最后，建立活塞–销–连杆热弹流润滑模型，对销孔型面优化前后的润滑及磨损性能进行了对比，并通过单缸机试验验证了型面优化效果。
Abstract:To reduce the wear of the full-floating piston pin friction pair in a certain high-power marine diesel engine， a polynomial profile expression method with continuous curvature at the segment was proposed， and the profile of the pin hole was optimized. A sub-model for the contact area between the pin and pin hole was established based on the thermo-mechanical coupling model of the piston pin friction pair for pin hole profile optimization， which can improve computational efficiency by 120 times. A high-order curve was designed based on the foundation of the previous job to replace the original conical profile. The pin hole profile was optimized using the sub-model and a Python-driven automatic surface design method， resulting in a 12.7% reduction in the maximum stress of the pin hole. A thermo-elastic hydrodynamic lubrication model for the piston-pin-connecting rod was constructed to compare the lubrication and wear performance before and after the pin hole profile optimization. The effectiveness of the profile optimization was verified through a single-cylinder engine test.
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