Dizel Lokomotif Ağır Hizmet Motorunda Kullanılan Egzoz Supap Bagası Hasarları

Year 2022, Issue: 15, 75 - 83, 31.01.2022

Yalçın Özdemir , Seyid Fehmi Diltemiz Gökhan Kandemir

https://doi.org/10.47072/demiryolu.1050061

Abstract

En genel tanımıyla baga (supap yuvası), içten yanmalı motorlarda silindir başlığında bulunan, supap oturma yüzeyiyle temas ederek sızdırmazlık sağlayan önemli bir motor bileşenidir. Hem egzoz hem de emme supaplarının işlevini doğru bir şekilde yapabilmesi için bagaların da kusursuz bir şekilde çalışması gerekir. Supap ve baganın temas yüzeylerinde meydana gelecek hasar çalışma performansını etkilemektedir. Ağır yük dizel motorlar yüksek güç temini gerektiren araçlarda kullanılan yüksek hacimli motorlardır. Bu araştırma kapsamında baga ele alınmış ve ağır yük dizel motor egzoz supap bagalarına odaklanılmıştır. Egzoz subap bagaları hakkında bilgi verilmiş, örnek bir dizel lokomotif ağır hizmet motoru egzoz subap bagalarında meydana gelen hasarlar değerlendirilmiştir. Numuneler üzerinden alınan kesitler ve hasarlı yüzeylerden elde edilen görüntüler incelenmiştir.

Keywords

Hasar, Dizel Motor, Sübap

Exhaust Valve Seat Insert Damages of Diesel Locomotive Heavy Duty Engine

Abstract

In general definition, the valve seat insert is an important engine component in the cylinder head of internal combustion engines, which provides sealing by contacting the valve seat surface. In order for both the exhaust and intake valves to function properly, valve seat inserts also need to work perfectly. Failures that effects the performance of the engine on the surface of valve and valve seat. Heavy-duty diesel engines are high-volume engines used in vehicles that require high power supply. The scope of this research is valve seats and researchers focused on the heavy-duty diesel engine valve seats. Information about the exhaust valve seats was given, and the damages on the exhaust valve seats of a sample diesel locomotive heavy-duty engine were evaluated. Images and sections were taken from the samples and explanations were given.

Keywords

Failure, Diesel engine, valve

References

• [1] “Article Zings - Blog: Reasons for Valve Seat Failure in Engines”. [Online]. Available: https://article-zings.page4.me/_blog/2019/06/11/12-Reasons-for-Valve-Seat-Failure-in-Engines/. [Accessed Dec. 27, 2021].
• [2] Wikipedia, “Valve seat - Wikipedia”. [Online]. Available: https://en.wikipedia.org/wiki/Valve_seat [Accessed Dec. 27, 2021].
• [3] F. Küçükşahin, Dizel motorları & gemi dizel makinelerinin yapıları ve çalışma ilkeleri . Türkiye: Birsen Yayınevi, 2000.
• [4] W.S. Giles, ''Fundamentals of valve design and material selection,'' SAE Technical Paper 660471, Feb. 1966. https://doi.org/10.4271/660471.
• [5] Y. S. Wang, S. Narasimhan, J. M. Larson, J. E. Larson, and G. C. Barber, “The effect of operating conditions on heavy duty engine valve seat wear,” Wear, vol. 201, no. 1–2, pp. 15–25, Dec. 1996, doi: 10.1016/S0043-1648(96)06945-1.
• [6] R. Zhao, G. C. Barber, Y. S. Wang, and J. E. Larson, “Wear mechanism analysis of engine exhaust valve seats with a laboratory simulator,” Tribol. Trans., vol. 40, no. 2, pp. 209–218, Jan. 1997, doi: 10.1080/10402009708983647.
• [7] L. C. Yang, A. Hamada, and K. Ohtsubo, “Engine Valve Temperature Simulation System,” SAE Tech. Pap., Mar. 2000, doi: 10.4271/2000-01-0564.
• [8] R. Lewis and R. S. Dwyer-Joyce, “An experimental approach to solving combustion engine valve and seat wear problems,” Tribol. Ser., vol. 39, pp. 629–640, 2001, doi: 10.1016/S0167-8922(01)80145-0.
• [9] K. Ando, A. Manabe, and A. Yasuda, “Hardfaced valve and P/M valve seat system for CNG and LPG fuel engines,” SAE Tech. Pap., 2005, doi: 10.4271/2005-01-0718.
• [10] M. H. Shojaefard, A. R. Noorpoor, D. A. Bozchaloe, and M. Ghaffarpour, “Transient Thermal Analysis of Engine Exhaust Valve,” Numerical Heat Transfer, Part A, vol. 48, no. 7, pp. 627–644, Feb. 2007, doi: 10.1080/10407780590959943.
• [11] K. J. Chun, J. H. Kim, and J. S. Hong, “A study of exhaust valve and seat insert wear depending on cycle numbers,” Wear, vol. 263, no. 7–12, pp. 1147–1157, Sep. 2007, doi: 10.1016/J.WEAR.2007.02.006.
• [12] J. S. Hong, Y. S. Kim, and K. J. Chun, “Study on exhaust valve and seat insert wear depending on fuel type,” Int. J. Precis. Eng. Manuf., vol. 13, no. 2, pp. 253–260, Feb. 2012, doi: 10.1007/S12541-012-0031-5.
• [13] F. J. Cavalieri, C. Luengo, J. Risso, F. Zenklusen, and A. Cardona, “Numerical and experimental stress analysis of an internal-combustion engine valve during the closing event,” Proc. Inst. Mech. Eng. Part D J. Automob. Eng., vol. 228, no. 5, pp. 479–489, Ap. 2014, doi: 10.1177/0954407013498862.
• [14] Wikipedia, “TCDD DE24000 - Wikipedia.” [Online]. Available: https://en.wikipedia.org/wiki/TCDD_DE24000 [Accessed: Dec. 31, 2021].
• [15] Y. S. Wang, S. K. Schaefer, C. Bennett and G. C. Barber, “Wear Mechanisms of Valve Seat and Insert in Heavy Duty Diesel Engine,” SAE Technical Paper Series 952476, pp. 686–691, Oct. 1995, https://doi.org/10.4271/952476.
• [16] Otai steel, "H13 Tool Steel | 1.2344 | X40CrMoV5-1 | SKD61 Hot Work Steel". [Online]. Available: http://www.astmsteel.com/product/h13-tool-steel-x40crmov5-1-skd61-hot-work-steel/[Accessed: 13-12-2021]
• [17] J. Zhao, S. Zhang, Z. Dou, Y. Sun, J. Wan and L. Du, "Influence of Sulfur and Additives on Wear of Exhaust Valve Seat of Cylinder Head", Complexity, vol. 2021, 14 p., July 2021, https://doi.org/10.1155/2021/4762184.
• [18] C. Ji, Q. Guo, J. Li, Y. Guo, Z. Yang, W. Yang, D. Xu, and B. Yang, “Microstructure and properties of CrN coating via multi-arc ion plating on the valve seat material surface,” J. Alloys Compd., vol. 891, p. 161966, Jan. 2022, doi: 10.1016/J.JALLCOM.2021.161966.