Numerical Investigations on the Sealing Performance of a Reciprocating Seal Based on the Inverse Lubrication Method

Abstract

The work presented in this paper describes a new approach to calculate the film profile, friction, and fluid transport of a reciprocating U-cup seal used in a hydraulic piston pump. An innovative partial lubrication model of the seal is developed, which connects the inverse hydrodynamic lubrication method and Greenwood–Williamson asperity contact model. Finite element models (FEM) were established to simulate deformation behavior under-mounted and pressurized process using finite element code ansys. Based on the finite element simulations, corresponding numerical calculations have been made using the matlab with the inverse hydrodynamic lubrication and asperity contact theories. The accuracy of these models was validated against existing experimental data to ensure that they can predict the sealing performance sufficiently. The effects of the operating parameters as well as the magnitude of interference on the sealing performance in terms of friction, fluid transport, and film thickness were discussed. The results of the simulation indicate that the interference fit, sealed pressure, and rod velocity play significant roles to improve the wear and seizure resistance capability that is critical to the service life of the seal.

Research on the sealing performance of a seawater stop valve considering roundness error used in an 11000-m manned submersible

“…31 Previous studies have mainly focused on the effect of surface microtopography, such as surface roughness, on sealing performance. 32,33 Peng et al conducted a comparative analysis of leakage calculations for metallic seals of ball-seat valves based on two contact models: the multi-asperity model and the magnification-based model. This study was verified by experiments.…”

Hybrid lubrication model study of slip ring combination seal under the influence of frictional heat

“…4,5 Building on this, Xiang et al 5 used the EHL method to calculate the initial liquid film thickness using the Inverse Hydrodynamic Lubrication theory. [6][7][8] They obtained the flexibility matrix through hydrodynamic and contact mechanics analysis, and adjusted the liquid film thickness by multiplying it with the imbalance pressure in the sealing zone. This process exhibits rapid convergence and strong stability.…”

An ultrasonic method for measurement of oil films in reciprocating rubber O-ring seals

“…They are designed to prevent leakage of a lubricant or sealed media and ensure efficient and safe operation of hydraulic systems. They are present in almost all aspects of automobile, aerospace, marine, and wider manufacturing sectors [1][2][3]. Hydraulic reciprocating seals encompass rod seals and piston seals.…”