Modeling of contact stresses and evaluation of wear life of a valve mechanism guide with lubricating grooves
DOI:
https://doi.org/10.31891/2079-1372-2024-114-4-54-62Keywords:
guide bushing, valve, lubricating grooves, finite element analysis, contact pressure, resourceAbstract
Valve guides are crucial for maintaining proper alignment, positioning, and valve stem clearance as it moves in the cylinder head. Valve bushings are subjected to load and sliding friction; with excessive wear of the guides, the engine begins to consume oil and the valve mechanism becomes noisy. This paper proposes the use of a special knurling to restore and increase the wear resistance of guide bushings. The profile tool is designed to restore valve guides by rolling a spiral groove on the inner surface of the sleeve. After applying this technology, a spiral oil-retaining profile remains on the surface of the sleeve bore. . Using the Solid model, the effect of changing the geometry of the guide bore by the lubricating grooves on the maximum and average stress indices in the guide-valve contact was analyzed. It was found that the maximum stresses of the model with grooves are lower than those of the model with a smooth guide surface. Based on the finite element model, the durability of the valve-guide pair with oil-retaining grooves was analyzed and it was determined how many cycles the contact surface of the guide can withstand. It was established that by reducing the contact pressure, the actual resource of the guide with grooves increased.
References
Buscaglia GC, Ausas RF, Jai M (2006) Optimization tools in the analysis of micro-textured lubricated devices. Inverse Prob Sci Eng 14(4):365–378. https://doi.org/10.1080/17415970600573452
Nikam MD, Shimpi D, Bhole K, Mastud SA (2019) Design and development of surface texture for tribological application. Key Eng Mater 4834:55–59. https://doi.org/10.4028/www.scientific.net/KEM.803.55
Wang HT, Zhu H (2015) Tribology properties of textured surface with ring-shape pits. Lubr Eng 40(01):49–53. https://doi.org/10.3969/j.issn.0254-0150.2015.01.011
Rahmani R, Mirzaee I, Shirvani A, Shirvani H (2010) An analytical approach for analysis and optimisation of slider bearings with infinite width parallel textures. Tribol Int 43(8):1551–1565. https://doi.org/10.1016/j.triboint.2010.02.016
Fu Y, Ji J and Bi Q. The influence of partially textured slider with oriented parabolic grooves on the behaviors of hydrodynamic lubrication. Tribol Trans 2012; 55: 210–217.
Feng, H.; Peng, L. Numerical analysis of water-lubricated thrust bearing with groove texture considering turbulence and cavitation. Ind. Lubr. Tribol. 2018, 70, 1127–1136. [CrossRef]
Brito FP, Miranda AS, Claro JCP, Fillon M. Experimental comparison of the performance of a journal bearing with a single and a twin axial groove configuration. Tribology International 2012; 54:1–8.
Brito FP, Miranda AS, Claro JCP, Fillon M. Experimental comparison of the performance of a journal bearing with a single and a twin axial groove configuration. Tribology International 2012; 54:1–8.
S. B. Malanoski, C. H. T. Pan, The Static and Dynamic Characteris319 tics of the Spiral-Grooved Thrust Bearing, Journal of Basic Engineering 320 87 (3) (1965) 547–555. doi:10.1115/1.3650603.
