Research on Improving Seal Performance of High Pressure Gas for the Accumulator

Lu, Ya Ping; Kang, Jian

doi:10.4028/www.scientific.net/amm.415.442

Cited by 1 publication

(1 citation statement)

References 4 publications

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“…At time 6, the fluid pressure is lowest and the rough peak contact pressure is highest. At this time, the friction will be large, because the friction of the seal is mainly determined by the rough peak contact pressure (Wu, 2016). At the same time, according to the nature of the G-W model (Greenwood and Williamson, 1966), the film thickness corresponds to the contact pressure one by one, which can be inferred that the film thickness is the most prone to wear, so the piston rod experiences considerable friction during the start-stop phase.…”

Section: Resultsmentioning

confidence: 99%

Thermo-elastohydrodynamic lubrication performance study of step seal under transient condition

Wei,

Sun,

Tian

et al. 2023

ILT

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Purpose This paper aims to study the impact of transient velocity changes on sealing performance during reciprocating sealing processes. Design/methodology/approach Establish a model of transient mixed lubrication, solve the transient Reynolds equation, consider the effect of temperature rise at the seal interfaces, and determine the behavior of the seal interfaces, such as film thickness and fluid pressure. Evaluation with friction and leakage rate, calculate the variation of sealing performance with reciprocating velocity under different working conditions, and verify it through bench experiments. Findings Within a reciprocating stroke, the frictional force decreases with increasing velocity, and the frictional force of the outstroke is greater than that of the instroke; at the time of the stroke transition, the fluid pressure is smallest and the rough peak contact pressure is greatest. At present, the dynamic pressure effect of fluids is the largest, and the friction force also increases, which increases the risk of material wear and failure. Friction and leakage increase with increasing pressure and root mean square roughness. As temperature increases, friction increases and leakage decreases. In studying the performance variations of seal components through a reciprocating sealing experiment, it was found that the friction force decreases with increasing velocity, which is consistent with the calculated results and more similar to the calculated results considering the temperature rise. Originality/value This study provides a reference for the study of transient sealing performance.

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Section: Resultsmentioning

confidence: 99%