Abstract
Reciprocating compressors are one of the most common machines, as they are usually found in household refrigerators and air conditioners. The reciprocating compressor is a rotor-crankshaft-piston machine supported by lubricated bearings. They are sealed to retain and store the refrigerating gas, therefore, the maintenance of the compressor is difficult and expensive. Thus reciprocating compressors should be designed to last the life span of the appliance. Most models of reciprocating compressors considers rigid bearings, which completely neglects the influence of the hydrodynamic bearings on the dynamic behavior of the compressor. This work shows the modeling and analysis of a reciprocating compressor with flexible bearings. The rotor which is part of the motor is supported by a pair of hydrodynamic bearings that are modeled using three different analytical models: Capone, Vance and Butenschön. Analytical models of bearing are much faster than numerical ones, such as the ones that use the finite difference (FDM) or finite element method (FEM). The three models have different approaches to solve the Reynolds equation and, therefore, distinct results were found using each one of them. The model was developed in the OpenModelica software using the elements of the Mechanics.Multibody library. The Butenschön model was implemented in C and Fortran 95 and integrated to OpenModelica as an external library.
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References
Bukovnik, S., Dörr, N., Čaika, V., Bartz, W.J., Loibnegger, B.: Analysis of diverse simulation models for combustion engine journal bearings and the influence of oil condition. Tribol. Int. 39(8), 820–826 (2006). https://doi.org/10.1016/j.triboint.2005.07.023
Butenschön, H.J.: Das hydrodynamische, zylindrische gleitlager endlicher breite unter instationärer belastung. Ph.D. thesis, Technische Universitaet Karlsruhe (1976)
Campbell, J., Love, P., Martin, F., Rafique, S.: Paper 4: bearings for reciprocating machinery: a review of the present state of theoretical, experimental and service knowledge. In: Proceedings of the Institution of Mechanical Engineers, Conference Proceedings, vol. 182, pp. 51–74. SAGE Publications, London (1967)
Capone, G.: Descrizione analitica del campo di forze fluidodinamico nei cuscinetti cilindrici lubrificati. Energ. Elettr. 68(3), 105–110 (1991)
Cavalini Jr., A.A., Lara-Molina, F.A., Sales, T.D.P., Koroishi, E.H., Steffen Jr., V.: Uncertainty analysis of a flexible rotor supported by fluid film bearings. Lat. Am. J. Solids Struct. 12(8), 1487–1504 (2015)
Estupinan, E.A., Santos, I.F.: Linking rigid multibody systems via controllable thin fluid films. Tribol. Int. 42(10), 1478–1486 (2009)
Estupiñan, E.A., Santos, I.F.: Modelling hermetic compressors using different constraint equations to accommodate multibody dynamics and hydrodynamic lubrication. J. Braz. Soc. Mech. Sci. Eng. 31(1), 35–46 (2009)
Fritzson, P.: Principles of Object-Oriented Modeling and Simulation with Modelica 2.1. Wiley, Hoboken (2010)
Hannukainen, P., et al.: Non-linear journal bearing model for analysis of superharmonic vibrations of rotor systems. Ph.D. thesis, Lappeenranta University of Technology (2008)
Kim, T.J.: Dynamic analysis of a reciprocating compression mechanism considering hydrodynamic forces. KSME Int. J. 17(6), 844–853 (2003)
Kim, T.J., Han, J.S.: Comparison of the dynamic behavior and lubrication characteristics of a reciprocating compressor crankshaft in both finite and short bearing models. Tribol. Trans. 47(1), 61–69 (2004)
Kurka, P., Izuka, J., Paulino, K.: Dynamic loads of reciprocating compressors with flexible bearings. Mech. Mach. Theory 52, 130–143 (2012)
Okabe, E.: Analytical model of a tilting pad bearing including turbulence and fluid inertia effects. Tribol. Int. 114, 245–256 (2017)
Okabe, E.P., Masarati, P.: Detailed modeling of wind turbine gear set by general-purpose multibody dynamics. In: ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, pp. V006T10A074. American Society of Mechanical Engineers (2014)
Otter, M., Elmqvist, H., Mattsson, S.E.: The new modelica multibody library. In: 3rd International Modelica Conference, pp. 311–330 (2003)
Vance, J.M.: Rotordynamics of Turbomachinery. Wiley, Hoboken (1988)
Yang, B., Bradshaw, C.R., Groll, E.A.: Modeling of a semi-hermetic CO2 reciprocating compressor including lubrication submodels for piston rings and bearings. Int. J. Refrig. 36(7), 1925–1937 (2013)
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Okabe, E.P., Izuka, J.H., Resch, R. (2019). Analysis of Analytical Hydrodynamic Bearing Models on a Reciprocating Compressor. In: Cavalca, K., Weber, H. (eds) Proceedings of the 10th International Conference on Rotor Dynamics – IFToMM. IFToMM 2018. Mechanisms and Machine Science, vol 60. Springer, Cham. https://doi.org/10.1007/978-3-319-99262-4_22
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DOI: https://doi.org/10.1007/978-3-319-99262-4_22
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