Fluid dynamics of axial piston seal

Abstract

Purpose

The purpose of this paper is to investigate, theoretically and experimentally, the sealing performance of the axial piston seal on a larger diameter (100 mm in diameter) axial piston and reveal the sealing mechanism of the axial piston.

Design/methodology/approach

Based on the characteristics of the clearance flow between the seal and the piston, reasonable boundary conditions for Navier‐Stokes' equations are determined and the equations are modified, so that the final equations can describe the real flow state of the clearance flow.

Findings

Through combining the final equations with finite element method, the pressure distributions within the clearance field for the sealing part during the reciprocating motion of the piston and the leakage rate with the pressure are obtained. The deflections of the sealing part which affect sealing performance have been given.

Originality/value

Theoretical and experimental results show the internal relationship between the seal and the piston, also help to develop some newer piston pumps and improve on the seals of present high‐pressure piston pumps.

Citation

Yang, J. (2010), "Fluid dynamics of axial piston seal", Industrial Lubrication and Tribology, Vol. 62 No. 1, pp. 12-15. https://doi.org/10.1108/00368791011012416