船用低速机关键摩擦副建模分析与摩擦力无线测量验证

低速机结构复杂,其关键摩擦副的性能对船舶运营的经济性、安全性和稳定性有重要影响,然而,目前对低速机摩擦学问题的理论和试验研究很少.对船用低速机关键摩擦副进行建模分析,并对摩擦力进行无线测量验证.结合多体动力学和混合润滑理论建立了低速机关键摩擦副的多学科耦合仿真模型,实现对各摩擦副性能的预测;进而,基于间接测量思想,提出...

Modeling Analysis of Key Friction Pairs in Low-speed Marine Diesel Engines and Verification of Friction Force Based on Wireless Measurement

Tribological properties of low-speed marine diesel engines possessed an important impact on the economy， safety， and stability of ship operations. However， there were few theoretical and experimental studies on the tribology of the engines. The modeling of key friction pairs were realized， and the friction was verified by wireless measurement herein. Firstly， combined with multi-body dynamics and mixed lubrication theory， the tribo-dynamics model of key friction pairs was established. Then， a wireless measurement method of friction force was proposed based on the idea of indirect measurement， and a measurement system was developed to realize the on-line measurement of friction forces under fired conditions. The results show that the simulation results of the friction are consistent with the experimental ones， and the maximum friction errors between the simulation and the experiments are less than 5%. The simulation load of the crosshead bearing is also in good agreement with the experimental load. In addition， for the system oil consumption of the stuffing box， the errors between simulation results and test ones are less than 3%. The results show that the modeling and measurement methods are feasible， and may provide support for tribological design， energy conservation and emission reduction of low-speed marine diesel engines.