期刊
TRIBOLOGY INTERNATIONAL
卷 52, 期 -, 页码 75-86出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2012.02.024
关键词
Polymer viscoelasticity; Hydraulic seal; Elastohydrodynamics; Finite element
资金
- Georgia Power Company
- National Science Foundation, Engineering Research Center for Compact and Efficient Fluid Power
Viscoelastic effects on the performance of a hydraulic rod seal are examined using a viscoelastohydrodynamic model. The model consists of coupled macro and micro scale deformation and contact mechanics analyses and micro scale fluid mechanics analysis. Dynamic mechanical analysis and a constrained optimization method are used to extract the spectrum of relaxation time scales and corresponding instantaneous elastic moduli associated with the seal polymer, required by the model. Simulation results show that the seal performance, including leakage prevention and friction force, depends on the relationship between the characteristic time constants of the polymer's molecular chains and the seal cycle frequency. (C) 2012 Elsevier Ltd. All rights reserved.
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