A Novel Friction Model Basing on Journal Bearing Theory for Reciprocating Compressor

Abstract:

The paper presents a comprehensive friction model of reciprocating compressor which is able to evaluate friction losses in moving parts. The model consists of crankshaft, connecting rod and piston all supported by bearings as well as the piston ring/cylinder interface viewed as sliding friction. Hydrodynamic lubrication theory reveals relationship between load and friction coefficient and was demonstrated to be helpful to give insight to the lubrication characteristics of journal bearing. The model gave the composition of friction losses, friction coefficient dynamic change with orbiting angle and effect of oil viscosity on compressor performance. The results showed that the friction losses of piston ring/cylinder interface and the rod big end bearing was most part of the friction losses and it was necessary to choose suitable oil viscosity to reach the optimum compressor performance.

• Periodical: Applied Mechanics and Materials (Volume 456)
• Pages: 320-323
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.456.320
• Online since: October 2013
• Authors: Le Wang, Bin Tang, Yuan Yang Zhao
• Keywords: Bearing, Friction Coefficient (FC), Hydrodynamic Lubrication, Load, Viscosity

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