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https://doi.org/10.21278/TOF.503081625

Structural Design and Fatigue Analysis of Irregular Pinholes in Forged Steel Pistons

Shaolei Gai ; School of Mechanical and Electrical Engineering, Binzhou Polytechnic, Binzhou 256600, China
Shiying Liu ; Shandong Key Laboratory of Advanced Engine Piston Assembly, Binzhou Bohai Piston Co., Ltd., Binzhou 256600, China
Jun Wang ; Shandong Key Laboratory of Advanced Engine Piston Assembly, Binzhou Bohai Piston Co., Ltd., Binzhou 256600, China
Yan Jia ; Shandong Key Laboratory of Advanced Engine Piston Assembly, Binzhou Bohai Piston Co., Ltd., Binzhou 256600, China
Anhai Li ; Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan 250061, China; National Key Laboratory of High-End Metal Forming Equipment and Advanced Technology, Shandong University, Jinan 250061, China *

* Dopisni autor.

Sažetak

Fatigue wear and seizure failure of piston pinholes in engines are critical factors that hinder the improvement of engine power output. A piston with a non-circular pinhole structure was innovatively designed based on the deformation clearance fitting characteristics of piston pins and pinholes during service. The power law function equations governing both the internal and external contour curves of the piston pinholes were developed. A parametric three-dimensional piston assembly model was established using the UG software and imported into ANSYS for finite element-based multi-objective simulation analysis of the irregular pinhole structures with different power law coefficients. Subsequent fatigue wear tests on piston pinholes showed that slight adjustments to the power law coefficient of contour curves resulted in a 17% reduction in the pinhole contact pressure, a 42% improvement in the pin boss fatigue safety, and a 16% enhancement in the pinhole fatigue safety. Experimental observations confirmed significantly improved fatigue wear conditions at the top surface of the pinhole after slight adjustments to the power law coefficients of the piston pinhole contour curve.

Ključne riječi

fatigue analysis; fatigue wear; finite element analysis; irregular pinhole; steel piston

Hrčak ID:

351046

URI

https://hrcak.srce.hr/351046

Datum izdavanja:

16.6.2026.

Posjeta: 0 *