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- W2109687595 abstract "Efficiency and reliability of reciprocating hermetic compressors are of increasing interest, due to stricter energy consumption regulations and customer demands. Optimization of bearing design is particularly important, since one of the main contributors to power loss materializes at the compressor bearings. After prolonged operation, there could be scoring, sometimes scuffing or seizure at the piston pin bearing, which results in a decrease in the efficiency and reliability of the compressor. In this study a model of elastohydrodynamic lubrication of reciprocating compressor wristpin bearing was developed along with the simulation of the slider-crank mechanism of motion. Slider-crank dynamics, wristpin elastohydrodynamic and boundary lubrication, and elastic deformations are simultaneously solved in the computation. Deformations are calculated using the wristpin compliance matrix derived from a finite element model of the wristpin. The methodology was used to understand the physics of lubrication of the small end bearing, particularly the necessity of using an elastic model versus a rigid one. The design parameters were altered to reach a superior design in terms of reduced boundary lubrication and projected wear. NOMENCLATURE A : Coefficient matrix of pressures 4 a : Piston acceleration C : Compliance matrix e : Eccentricity gas F : Gas force on piston 34 F : Force on wristpin h : Clearance array dyn h : Clearance due to geometry L : Bearing axial length b m3 : Connecting rod equivalent mass 4 m : Piston mass P : Oil pressure c P : Contact pressure sc P : Suction pressure R : Wrist-pin radius t : Time z : Axial coordinate on the bearing α : Crank angle β : Connecting rod angle δ : Radial deformation array θ : Angular coordinate on the bearing μ : Viscosity φ : Attitude angle ω : Connecting rod rotational speed" @default.
- W2109687595 created "2016-06-24" @default.
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- W2109687595 date "2002-01-01" @default.
- W2109687595 modified "2023-09-26" @default.
- W2109687595 title "Design Improvement Of A Compressor Bearing Using An Elastohydrodynamic Lubrication Model" @default.
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