탄성유체윤활해석에 의한 연료 펌프 저널베어링 최적간극 선정 연구
A Study on the Optimum Clearance Selection of Fuel Pump Journal Bearing with Elasto-hydrodynamic Lubrication Analysis
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초록
The electric controlled marine diesel engine has fuel pump generating the high pressurized fuel for fuel injection to combustion chamber via a common rail. Fuel pump consists of a cam-roller system. Journal bearing installed between a roller and a cam-roller pin is subjected to fluctuating heavy and instant loads by cam lift. First, Kinematic analysis is carried out to predict bearing loads during one cycle acting on the journal bearing. Second, flexible multi-body dynamic analysis and transient elasto-hydrodynamic(EHD) lubrication analysis for journal bearing considering elastic deformation of cam-roller pin, roller and bearing are conducted using AVL EXCITE/PU software to predict lubrication performance. The clearance ratio and journal groove shape providing lubrication oil are important parameter in bearing design having good performance and can be changed easier than other design parameters such as diameter, width, oil supply pressure and bearing material grade. Generally, journal bearing performance is represented by the minimum oil film thickness(MOFT) and peak oil film pressure( POFP). As well as the traditional design parameters(MOFT, POFP), in this study, temperature rise of lubrication oil is also evaluated through the side leakage flow of supplied oil. By the evaluating MOFT, POFP and temperature rise, the optimum bearing clearance ratio is decided.
Abstract
The electric controlled marine diesel engine has fuel pump generating the high pressurized fuel for fuel injection to combustion chamber via a common rail. Fuel pump consists of a cam-roller system. Journal bearing installed between a roller and a cam-roller pin is subjected to fluctuating heavy and instant loads by cam lift. First, Kinematic analysis is carried out to predict bearing loads during one cycle acting on the journal bearing. Second, flexible multi-body dynamic analysis and transient elasto-hydrodynamic(EHD) lubrication analysis for journal bearing considering elastic deformation of cam-roller pin, roller and bearing are conducted using AVL EXCITE/PU software to predict lubrication performance. The clearance ratio and journal groove shape providing lubrication oil are important parameter in bearing design having good performance and can be changed easier than other design parameters such as diameter, width, oil supply pressure and bearing material grade. Generally, journal bearing performance is represented by the minimum oil film thickness(MOFT) and peak oil film pressure( POFP). As well as the traditional design parameters(MOFT, POFP), in this study, temperature rise of lubrication oil is also evaluated through the side leakage flow of supplied oil. By the evaluating MOFT, POFP and temperature rise, the optimum bearing clearance ratio is decided.
참고문헌 (10)
- Pounder, "Marine Diesel Engines and Gas Turbines, Chap. 8", pp.234~263 (2009), Dongmyungsa
- Sharda, H. B., "EHD analysis of a misaligned journal bearing", International Journal of Mechanical Sciences, 35, pp.415~423 (1993)
- Stanislaw Strzelecki, "Thermoelastohydrodynamic analysis of dynamically loaded journal bearings", Internal Combustion Engines, 7, pp.497~502 (2000)
- Mohamad Ali Ahmad, "Experimental study on the effects of oil groove location on temperature and pressure profiles in journal bearing lubrication", Tribology International, 74, pp.79~86 (2014)
- Brito, F. P., "Analysis of the effect of grooves in single and twin axial groove journal bearings under varying load direction", Tribology International, 103, pp.220~230 (2016)
- Jung Ho Son, "EHD analysis and fretting damage prediction of marine engine’s connecting rod", Proceedings of the KSTLE Spring Conference, pp.53~54 (2011)
- Sang Don Lee, "Elasto-hydrodynamic lubrication analysis of journal bearing under reversed cyclic loading", Proceedings of the KSTLE Spring Conference, pp.105~106 (2014)
- Nadir. Patir, "Application of average flow model to lubrication between rough sliding surfaces", Transactions of the ASME, 101, pp.220~230 (1979)
- Peklenik, J., "New developments in surface characterization and measurement by means of random process analysis", Insts. Mech. Engrs, 182, pp.108~ (1968)
- Patir, N., "Application of average flow model to lubrication between rough sliding surfaces", ASME Journal of Lubrication Technology, 101, pp.220~230 (1979)