Thermo-elastohydrodynamic mixed-lubrication model for reciprocating rod seals. (December 2019)

• Record Type: Journal Article
• Authors: Xiang, Chong; Guo, Fei; Jia, Xiaohong; Wang, Yuming; Huang, Xing
• Is Part Of: Tribology international. Volume 140(2019)
• Publication Date: 2019-12
• Subjects: Alternating direction implicit method -- Finite-difference method -- Thermo-elastohydrodynamic lubrication -- Reciprocating rod seals; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2019.105894
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: A thermo-elastohydrodynamic lubrication model of a typical VL combined reciprocating rod seal is established to analyze thermal-viscous effects on the reciprocating rod sealing system. Both the inverse and elastohydrodynamic lubrication theories are interactively applied to calculate the pressure and thickness of the lubrication film. The influence coefficient method is used to couple the fluid mechanics, macroscopic solid mechanics, and microscopic contact mechanics. The temperature field is solved using the finite-difference method. With the alternating direction implicit method, the classical heat transfer equation is discretized. The calculation results obtained with the present model are compared with those of a model without thermal correction. A considerable difference is found between the two calculations especially at high rod velocities. Highlights: The transient temperature field of reciprocating rod seal is simulated. There is a marked change in temperature during one stroke. At higher temperatures, lubricating film thickness decreases and friction increases. The film thickness is more sensitive to temperature during the instroke than outstroke. The leakage increases with higher temperatures.